diff --git a/tests/msc_vlr/msc_vlr_test_authen_reuse.err b/tests/msc_vlr/msc_vlr_test_authen_reuse.err
index 7ac510b..4b6ea47 100644
--- a/tests/msc_vlr/msc_vlr_test_authen_reuse.err
+++ b/tests/msc_vlr/msc_vlr_test_authen_reuse.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -30,7 +30,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -52,7 +52,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -75,7 +75,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -144,7 +144,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -161,14 +161,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -193,7 +193,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -217,14 +217,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -248,19 +248,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -268,16 +268,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -301,7 +301,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -322,7 +322,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -346,7 +346,7 @@
   cm_service_result_sent == 0
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -370,19 +370,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -390,16 +390,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -418,7 +418,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -430,12 +430,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -453,7 +453,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -477,7 +477,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -499,7 +499,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -518,7 +518,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -603,7 +603,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -620,14 +620,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -652,7 +652,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -676,14 +676,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -702,7 +702,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -721,7 +721,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -729,10 +729,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -740,16 +740,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -773,7 +773,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -794,7 +794,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -818,7 +818,7 @@
   cm_service_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -837,7 +837,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -856,7 +856,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -864,10 +864,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -875,16 +875,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -903,7 +903,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -915,12 +915,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -938,7 +938,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -962,7 +962,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -984,7 +984,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1007,7 +1007,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -1076,7 +1076,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1093,14 +1093,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1125,7 +1125,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1149,14 +1149,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1180,19 +1180,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1200,16 +1200,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1233,7 +1233,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1257,14 +1257,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1288,19 +1288,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1308,16 +1308,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1341,7 +1341,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1365,14 +1365,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1396,19 +1396,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1416,16 +1416,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1444,7 +1444,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -1456,12 +1456,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1479,7 +1479,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1503,7 +1503,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1525,7 +1525,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1544,7 +1544,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1629,7 +1629,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1646,14 +1646,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1678,7 +1678,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1702,14 +1702,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1728,7 +1728,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1747,7 +1747,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -1755,10 +1755,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1766,16 +1766,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1799,7 +1799,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1823,14 +1823,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1849,7 +1849,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1868,7 +1868,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -1876,10 +1876,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1887,16 +1887,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1920,7 +1920,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1944,14 +1944,14 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1970,7 +1970,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1989,7 +1989,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -1997,10 +1997,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -2008,16 +2008,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2036,7 +2036,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -2048,12 +2048,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2071,7 +2071,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -2095,7 +2095,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -2117,7 +2117,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2140,7 +2140,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -2209,7 +2209,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -2226,14 +2226,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2258,7 +2258,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -2279,7 +2279,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -2303,7 +2303,7 @@
   cm_service_result_sent == 0
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2327,19 +2327,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -2347,16 +2347,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2375,7 +2375,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -2387,12 +2387,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2410,7 +2410,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -2434,7 +2434,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -2456,7 +2456,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2475,7 +2475,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -2560,7 +2560,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -2577,14 +2577,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2609,7 +2609,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -2630,7 +2630,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -2654,7 +2654,7 @@
   cm_service_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2673,7 +2673,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -2692,7 +2692,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -2700,10 +2700,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -2711,16 +2711,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2739,7 +2739,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -2751,12 +2751,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_call.err b/tests/msc_vlr/msc_vlr_test_call.err
index 1918357..7a70b4b 100644
--- a/tests/msc_vlr/msc_vlr_test_call.err
+++ b/tests/msc_vlr/msc_vlr_test_call.err
@@ -7,7 +7,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -31,7 +31,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -53,7 +53,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -72,7 +72,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -141,7 +141,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -158,15 +158,15 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - LU was successful, and the conn has already been closed
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -190,7 +190,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -214,7 +214,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -223,7 +223,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -242,7 +242,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -261,7 +261,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -269,14 +269,14 @@
 - a call is initiated
 - SETUP gets forwarded to MNCC
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_SETUP
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
 DCC Unknown transaction ID 8, creating new trans.
 DCC (ti 08 sub MSISDN:42342 callref 80000001) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 3
-DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a)
+DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a: dtap,cm_service,trans_cc)
 DMM MSISDN:42342: rx msg GSM48_MT_CC_SETUP: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12)
+DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12: dtap,trans_cc)
 DCC (ti 08 sub MSISDN:42342) new state NULL -> INITIATED
 DCC Subscriber MSISDN:42342 (42342) sends SETUP to 123
 DMNCC transmit message MNCC_SETUP_IND
@@ -284,7 +284,7 @@
   MSC --> MNCC: callref 0x80000001: MNCC_SETUP_IND
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - MNCC says that's fine
 DMNCC receive message MNCC_CALL_PROC_REQ
 DCC (ti 08 sub 42342) Received 'MNCC_CALL_PROC_REQ' from MNCC in state 1 (INITIATED)
@@ -310,7 +310,7 @@
 - DTAP matches expected message
 - Total time passed: 2.000046 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CONNECT_ACK
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_CONNECT_ACK (0x3:0xf)
 DCC stopping pending timer T313
 DCC (ti 08 sub MSISDN:42342) new state CONNECT_IND -> ACTIVE
@@ -318,21 +318,21 @@
 DCC Sending 'MNCC_SETUP_COMPL_IND' to MNCC.
   MSC --> MNCC: callref 0x80000001: MNCC_SETUP_COMPL_IND
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 ---
 - RTP stream goes ahead, not shown here.
 - Total time passed: 125.000091 s
 ---
 - Call ends
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_DISCONNECT
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_DISCONNECT (0x3:0x25)
 DCC (ti 08 sub MSISDN:42342) new state ACTIVE -> DISCONNECT_IND
 DMNCC transmit message MNCC_DISC_IND
 DCC Sending 'MNCC_DISC_IND' to MNCC.
   MSC --> MNCC: callref 0x80000001: MNCC_DISC_IND
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 DMNCC receive message MNCC_REL_REQ
 DCC (ti 08 sub 42342) Received 'MNCC_REL_REQ' from MNCC in state 12 (DISCONNECT_IND)
 DCC starting timer T308 with 10 seconds
@@ -341,7 +341,7 @@
 - DTAP --RAN_UTRAN_IU--> MS: GSM48_MT_CC_RELEASE: 832d
 - DTAP matches expected message
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_RELEASE_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_RELEASE_COMPL (0x3:0x2a)
 DCC stopping pending timer T308
 DMNCC transmit message MNCC_REL_CNF
@@ -350,17 +350,17 @@
   MS <--Call Release-- MSC: subscr=MSISDN:42342 callref=0x0
 DCC (ti 08 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -385,7 +385,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -409,7 +409,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -431,7 +431,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -450,7 +450,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -519,7 +519,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -536,15 +536,15 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - LU was successful, and the conn has already been closed
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -580,7 +580,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -604,13 +604,13 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -629,7 +629,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(PAGING_RESP:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -650,7 +650,7 @@
 DPAG Paging success for MSISDN:42342 (event=0)
 DPAG Calling paging cbfn.
 DCC Paging subscr 42342 succeeded!
-DREF MSISDN:42342: MSC conn use + trans_cc == 1 (0x10)
+DREF MSISDN:42342: MSC conn use + trans_cc == 1 (0x10: trans_cc)
 DCC starting timer T303 with 30 seconds
 DCC (ti 00 sub MSISDN:42342) new state NULL -> CALL_PRESENT
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_UTRAN_IU
@@ -661,7 +661,7 @@
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: CC
   paging_stopped == 1
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CALL_CONF
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_CALL_CONF (0x3:0x8)
 DCC stopping pending timer T303
 DCC starting timer T310 with 30 seconds
@@ -672,10 +672,10 @@
   MSC --> MNCC: callref 0x423: MNCC_CALL_CONF_IND
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - Total time passed: 1.000023 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_ALERTING
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_ALERTING (0x3:0x1)
 DCC stopping pending timer T310
 DCC starting timer T301 with 180 seconds
@@ -684,10 +684,10 @@
 DCC Sending 'MNCC_ALERT_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_ALERT_IND
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - Total time passed: 2.000046 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CONNECT
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_CONNECT (0x3:0x7)
 DCC stopping pending timer T301
 DCC (ti 00 sub MSISDN:42342) new state CALL_RECEIVED -> CONNECT_REQUEST
@@ -695,7 +695,7 @@
 DCC Sending 'MNCC_SETUP_CNF' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_SETUP_CNF
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 DMNCC receive message MNCC_SETUP_COMPL_REQ
 DCC (ti 00 sub 42342) Received 'MNCC_SETUP_COMPL_REQ' from MNCC in state 8 (CONNECT_REQUEST)
 DCC (ti 00 sub MSISDN:42342) new state CONNECT_REQUEST -> ACTIVE
@@ -708,14 +708,14 @@
 ---
 - Call ends
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_DISCONNECT
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_DISCONNECT (0x3:0x25)
 DCC (ti 00 sub MSISDN:42342) new state ACTIVE -> DISCONNECT_IND
 DMNCC transmit message MNCC_DISC_IND
 DCC Sending 'MNCC_DISC_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_DISC_IND
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 DMNCC receive message MNCC_REL_REQ
 DCC (ti 00 sub 42342) Received 'MNCC_REL_REQ' from MNCC in state 12 (DISCONNECT_IND)
 DCC starting timer T308 with 10 seconds
@@ -724,7 +724,7 @@
 - DTAP --RAN_UTRAN_IU--> MS: GSM48_MT_CC_RELEASE: 032d
 - DTAP matches expected message
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_RELEASE_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_RELEASE_COMPL (0x3:0x2a)
 DCC stopping pending timer T308
 DMNCC transmit message MNCC_REL_CNF
@@ -733,17 +733,17 @@
   MS <--Call Release-- MSC: subscr=MSISDN:42342 callref=0x0
 DCC (ti 00 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2: dtap)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -768,7 +768,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -792,7 +792,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -814,7 +814,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -833,7 +833,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -902,7 +902,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -919,15 +919,15 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - LU was successful, and the conn has already been closed
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -963,7 +963,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -987,13 +987,13 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1012,7 +1012,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(PAGING_RESP:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1033,7 +1033,7 @@
 DPAG Paging success for MSISDN:42342 (event=0)
 DPAG Calling paging cbfn.
 DCC Paging subscr 42342 succeeded!
-DREF MSISDN:42342: MSC conn use + trans_cc == 1 (0x10)
+DREF MSISDN:42342: MSC conn use + trans_cc == 1 (0x10: trans_cc)
 DCC starting timer T303 with 30 seconds
 DCC (ti 00 sub MSISDN:42342) new state NULL -> CALL_PRESENT
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_UTRAN_IU
@@ -1044,7 +1044,7 @@
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: CC
   paging_stopped == 1
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_CALL_CONF
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_CALL_CONF (0x3:0x8)
 DCC stopping pending timer T303
 DCC starting timer T310 with 30 seconds
@@ -1055,10 +1055,10 @@
   MSC --> MNCC: callref 0x423: MNCC_CALL_CONF_IND
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - Total time passed: 1.000023 s
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_ALERTING
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_ALERTING (0x3:0x1)
 DCC stopping pending timer T310
 DCC starting timer T301 with 180 seconds
@@ -1067,12 +1067,12 @@
 DCC Sending 'MNCC_ALERT_IND' to MNCC.
   MSC --> MNCC: callref 0x423: MNCC_ALERT_IND
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - Total time passed: 16.000046 s
 - The call failed, the BSC sends a BSSMAP Clear Request
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x110)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x110: trans_cc,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 4
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DCC stopping pending timer T301
@@ -1090,10 +1090,10 @@
 DCC stopping pending timer T308
 DCC (ti 00 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x100: release)
 - Iu Release --RAN_UTRAN_IU--> MS
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1119,7 +1119,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1143,7 +1143,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1165,7 +1165,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1184,7 +1184,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1253,7 +1253,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1270,15 +1270,15 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - LU was successful, and the conn has already been closed
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1302,7 +1302,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1326,7 +1326,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -1335,7 +1335,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1354,7 +1354,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1373,7 +1373,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -1381,14 +1381,14 @@
 - a call is initiated
 - SETUP gets forwarded to MNCC
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_SETUP
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
 DCC Unknown transaction ID 8, creating new trans.
 DCC (ti 08 sub MSISDN:42342 callref 80000002) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 3
-DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a)
+DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a: dtap,cm_service,trans_cc)
 DMM MSISDN:42342: rx msg GSM48_MT_CC_SETUP: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12)
+DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12: dtap,trans_cc)
 DCC (ti 08 sub MSISDN:42342) new state NULL -> INITIATED
 DCC Subscriber MSISDN:42342 (42342) sends SETUP to 123
 DMNCC transmit message MNCC_SETUP_IND
@@ -1396,7 +1396,7 @@
   MSC --> MNCC: callref 0x80000002: MNCC_SETUP_IND
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - MNCC says that's fine
 DMNCC receive message MNCC_CALL_PROC_REQ
 DCC (ti 08 sub 42342) Received 'MNCC_CALL_PROC_REQ' from MNCC in state 1 (INITIATED)
@@ -1419,7 +1419,7 @@
 - DTAP --RAN_UTRAN_IU--> MS: GSM48_MT_CC_RELEASE: 832d
 - DTAP matches expected message
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_RELEASE_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x12: dtap,trans_cc)
 DRLL Dispatching 04.08 message GSM48_MT_CC_RELEASE_COMPL (0x3:0x2a)
 DCC stopping pending timer T308
 DMNCC transmit message MNCC_REL_CNF
@@ -1428,17 +1428,17 @@
   MS <--Call Release-- MSC: subscr=MSISDN:42342 callref=0x0
 DCC (ti 08 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - trans_cc == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1463,7 +1463,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1487,7 +1487,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1509,7 +1509,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1528,7 +1528,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1597,7 +1597,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1614,15 +1614,15 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - LU was successful, and the conn has already been closed
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1646,7 +1646,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1670,7 +1670,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -1679,7 +1679,7 @@
 msc_subscr_conn_is_accepted() == false
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1698,7 +1698,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1717,7 +1717,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -1725,14 +1725,14 @@
 - a call is initiated
 - SETUP gets forwarded to MNCC
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_CC_SETUP
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
 DCC Unknown transaction ID 8, creating new trans.
 DCC (ti 08 sub MSISDN:42342 callref 80000003) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 3
-DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a)
+DREF MSISDN:42342: MSC conn use + trans_cc == 3 (0x1a: dtap,cm_service,trans_cc)
 DMM MSISDN:42342: rx msg GSM48_MT_CC_SETUP: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12)
+DREF MSISDN:42342: MSC conn use - cm_service == 2 (0x12: dtap,trans_cc)
 DCC (ti 08 sub MSISDN:42342) new state NULL -> INITIATED
 DCC Subscriber MSISDN:42342 (42342) sends SETUP to 123
 DMNCC transmit message MNCC_SETUP_IND
@@ -1740,7 +1740,7 @@
   MSC --> MNCC: callref 0x80000003: MNCC_SETUP_IND
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x10: trans_cc)
 - MNCC says that's fine
 DMNCC receive message MNCC_CALL_PROC_REQ
 DCC (ti 08 sub 42342) Received 'MNCC_CALL_PROC_REQ' from MNCC in state 1 (INITIATED)
@@ -1771,15 +1771,15 @@
   MSC --> MNCC: callref 0x80000003: MNCC_REL_CNF
 DCC (ti 08 sub MSISDN:42342) new state RELEASE_REQ -> NULL
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_cc == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - trans_cc == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.err b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
index 24a085f..6671ade 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -30,7 +30,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -70,7 +70,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -93,7 +93,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -147,7 +147,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -157,7 +157,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -176,7 +176,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -199,7 +199,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -217,7 +217,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -241,19 +241,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -261,17 +261,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -305,7 +305,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -328,7 +328,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -345,7 +345,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(PAGING_RESP:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -372,14 +372,14 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000001) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 5
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x22: dtap,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: SMS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -390,15 +390,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -406,11 +406,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -418,7 +418,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -436,7 +436,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -448,12 +448,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -471,7 +471,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -495,7 +495,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -535,7 +535,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -558,7 +558,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -626,7 +626,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -643,15 +643,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -677,7 +677,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(TMSI)=50462976
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -700,7 +700,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -718,7 +718,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -742,19 +742,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:50462976){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -762,17 +762,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -806,7 +806,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(TMSI)=50462976
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -829,7 +829,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -846,7 +846,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(PAGING_RESP:50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -873,14 +873,14 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000002) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 5
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x22: dtap,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: SMS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -891,15 +891,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -907,11 +907,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -919,7 +919,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -938,7 +938,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(TMSI)=50462976 type=IMSI ATTACH
@@ -962,14 +962,14 @@
 - ...expecting sres=5afc8d72
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 5afc8d72)
 DVLR VLR_Authenticate(LU:50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -992,7 +992,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:50462976){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1060,7 +1060,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:50462976){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1076,15 +1076,15 @@
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1110,7 +1110,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=117835012
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1122,12 +1122,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1145,7 +1145,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1169,7 +1169,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1209,7 +1209,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1232,7 +1232,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1296,7 +1296,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1315,16 +1315,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1347,7 +1347,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1359,12 +1359,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1382,7 +1382,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1406,7 +1406,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1446,7 +1446,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1469,7 +1469,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1533,7 +1533,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1542,7 +1542,7 @@
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -1567,7 +1567,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1584,15 +1584,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1616,7 +1616,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=50462976
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1628,12 +1628,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1651,7 +1651,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1675,7 +1675,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1696,7 +1696,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM GSM AUTHENTICATION RESPONSE (sres = 9b36efdf)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1719,7 +1719,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1773,7 +1773,7 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 4
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1783,7 +1783,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1802,7 +1802,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1825,7 +1825,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -1843,7 +1843,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 85aa3130)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1867,19 +1867,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1887,17 +1887,17 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1931,7 +1931,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1954,7 +1954,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -1971,7 +1971,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 69d5f9fb)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1998,14 +1998,14 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:42342 callref 40000003) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 5
-DREF MSISDN:42342: MSC conn use + trans_sms == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + trans_sms == 2 (0x22: dtap,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: SMS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -2016,15 +2016,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
@@ -2032,11 +2032,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -2044,7 +2044,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2062,7 +2062,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -2074,12 +2074,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2098,7 +2098,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -2122,7 +2122,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -2162,7 +2162,7 @@
   lu_result_sent == 0
 - MS sends Authen Response with too short SRES data, auth is thwarted.
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM AUTHENTICATION RESPONSE: l3 length invalid: 5
 DMM IMSI:901700000004620: MM AUTHENTICATION RESPONSE: invalid: parsing GSM AKA Auth Response failed with rc=-22; dispatching zero length SRES/RES to trigger failure
@@ -2183,14 +2183,14 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000004620: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 2
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
index d5ddb6a..c05ea8d 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -30,7 +30,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -51,7 +51,7 @@
   auth_request_sent == 1
 - MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -71,7 +71,7 @@
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -151,7 +151,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -161,7 +161,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -180,7 +180,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -203,7 +203,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -221,7 +221,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -242,7 +242,7 @@
 - ...perm algo: 2
 - ...key: 07fa7502e07e1c00
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -271,7 +271,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:46071: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -279,10 +279,10 @@
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -290,17 +290,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -334,7 +334,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -357,7 +357,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -374,7 +374,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(PAGING_RESP:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -395,7 +395,7 @@
 - ...perm algo: 2
 - ...key: e2b234f807886400
 DVLR Process_Access_Request_VLR(PAGING_RESP:901700000004620){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cipher_mode_cmd_sent == 1
@@ -427,7 +427,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000001) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 5
-DREF MSISDN:46071: MSC conn use + trans_sms == 1 (0x20)
+DREF MSISDN:46071: MSC conn use + trans_sms == 1 (0x20: trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -444,15 +444,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -460,11 +460,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -472,7 +472,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -490,7 +490,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -502,12 +502,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -525,7 +525,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -549,7 +549,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -570,7 +570,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -590,7 +590,7 @@
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -685,7 +685,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -702,15 +702,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -736,7 +736,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(TMSI)=50462976
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -759,7 +759,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -777,7 +777,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -798,7 +798,7 @@
 - ...perm algo: 2
 - ...key: 07fa7502e07e1c00
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:50462976){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -827,7 +827,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:50462976){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:50462976){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:46071: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -835,10 +835,10 @@
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -846,17 +846,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -890,7 +890,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(TMSI)=50462976
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -913,7 +913,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -930,7 +930,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(PAGING_RESP:50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -951,7 +951,7 @@
 - ...perm algo: 2
 - ...key: e2b234f807886400
 DVLR Process_Access_Request_VLR(PAGING_RESP:50462976){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cipher_mode_cmd_sent == 1
@@ -983,7 +983,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000002) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 5
-DREF MSISDN:46071: MSC conn use + trans_sms == 1 (0x20)
+DREF MSISDN:46071: MSC conn use + trans_sms == 1 (0x20: trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -1000,15 +1000,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -1016,11 +1016,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1028,7 +1028,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1046,7 +1046,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=50462976
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1058,12 +1058,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1081,7 +1081,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1105,7 +1105,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1126,7 +1126,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1146,7 +1146,7 @@
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1236,7 +1236,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1255,16 +1255,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1287,7 +1287,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1299,12 +1299,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1322,7 +1322,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1346,7 +1346,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1367,7 +1367,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1387,7 +1387,7 @@
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cipher_mode_cmd_sent == 1
@@ -1488,7 +1488,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1498,7 +1498,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1517,7 +1517,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1529,12 +1529,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1552,7 +1552,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1576,7 +1576,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1597,7 +1597,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1617,7 +1617,7 @@
 - ...perm algo: 2
 - ...key: 61855fb81fc2a800
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1707,7 +1707,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1716,7 +1716,7 @@
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -1741,7 +1741,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1758,15 +1758,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1790,7 +1790,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=50462976
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1802,12 +1802,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1825,7 +1825,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1849,7 +1849,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1871,7 +1871,7 @@
   lu_result_sent == 0
 - MS sends *GSM AKA* Authen Response, VLR accepts and sends Ciphering Mode Command to MS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM GSM AUTHENTICATION RESPONSE (sres = dacc4b26)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1891,7 +1891,7 @@
 - ...perm algo: 2
 - ...key: 7a75f0ac9b844400
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1959,7 +1959,7 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 4
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1969,7 +1969,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1988,7 +1988,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -2012,7 +2012,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -2030,7 +2030,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends *GSM AKA* Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 2fb4cfad)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2051,7 +2051,7 @@
 - ...perm algo: 2
 - ...key: da149b11d473f400
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -2069,7 +2069,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -2077,10 +2077,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -2088,17 +2088,17 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2132,7 +2132,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -2156,7 +2156,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -2173,7 +2173,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends *GSM AKA* Authen Response, VLR accepts and requests Ciphering
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 0ff61e0f)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2194,7 +2194,7 @@
 - ...perm algo: 2
 - ...key: 26ec67fad3073000
 DVLR Process_Access_Request_VLR(PAGING_RESP:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cipher_mode_cmd_sent == 1
@@ -2215,7 +2215,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:42342 callref 40000003) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 5
-DREF MSISDN:42342: MSC conn use + trans_sms == 1 (0x20)
+DREF MSISDN:42342: MSC conn use + trans_sms == 1 (0x20: trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -2232,15 +2232,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
@@ -2248,11 +2248,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -2260,7 +2260,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2278,7 +2278,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -2290,12 +2290,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2313,7 +2313,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -2337,7 +2337,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -2359,7 +2359,7 @@
 ---
 - MS sends Authen Response, VLR accepts and wants to send Ciphering Mode Command to MS -- alas, no matching cipher can be found, abort and release
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2383,14 +2383,14 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000004620: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 2
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_hlr_reject.err b/tests/msc_vlr/msc_vlr_test_hlr_reject.err
index ac191be..f151838 100644
--- a/tests/msc_vlr/msc_vlr_test_hlr_reject.err
+++ b/tests/msc_vlr/msc_vlr_test_hlr_reject.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -30,7 +30,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -51,7 +51,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 3
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -61,7 +61,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -86,7 +86,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -110,7 +110,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -131,7 +131,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 3
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -141,7 +141,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -168,7 +168,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -192,7 +192,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -213,7 +213,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -236,7 +236,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -290,7 +290,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -300,7 +300,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -325,7 +325,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -347,7 +347,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -368,7 +368,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -391,7 +391,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -444,7 +444,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -454,7 +454,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -481,7 +481,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -505,7 +505,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -526,7 +526,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -549,7 +549,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -603,7 +603,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -613,7 +613,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -638,7 +638,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -660,7 +660,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -681,7 +681,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -691,7 +691,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -718,7 +718,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -742,7 +742,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -763,7 +763,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -786,7 +786,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -840,7 +840,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -850,7 +850,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -876,7 +876,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -898,7 +898,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -919,7 +919,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -929,7 +929,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -954,7 +954,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -978,7 +978,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -998,7 +998,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 3
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1008,7 +1008,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1033,7 +1033,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1060,7 +1060,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1081,7 +1081,7 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 3
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1090,7 +1090,7 @@
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1115,7 +1115,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1142,7 +1142,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1185,7 +1185,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 4
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1195,7 +1195,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_hlr_timeout.err b/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
index 646f078..dab8e2c 100644
--- a/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_hlr_timeout.err
@@ -7,7 +7,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -31,7 +31,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -53,7 +53,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Close event, cause: CONGESTION
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 2
 - sending LU Reject for IMSI:901700000004620, cause 22
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
@@ -64,7 +64,7 @@
 - SUBSCR_CONN_TIMEOUT has passed, conn is gone.
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -95,7 +95,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -122,7 +122,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -160,7 +160,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Close event, cause: CONGESTION
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 2
 - sending LU Reject for MSISDN:46071, cause 22
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_HLR_UPD}: state_chg to VLR_ULA_S_DONE
@@ -171,7 +171,7 @@
 - SUBSCR_CONN_TIMEOUT has passed, conn is gone.
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_ms_timeout.err b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
index a6f5411..eb40a97 100644
--- a/tests/msc_vlr/msc_vlr_test_ms_timeout.err
+++ b/tests/msc_vlr/msc_vlr_test_ms_timeout.err
@@ -7,7 +7,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -31,7 +31,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -73,7 +73,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Close event, cause: CONGESTION
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100)
+DREF IMSI:901700000004620: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr IMSI:901700000004620 usage increases to: 2
 - sending LU Reject for IMSI:901700000004620, cause 22
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
@@ -84,7 +84,7 @@
 - SUBSCR_CONN_TIMEOUT has passed, conn is gone.
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -115,7 +115,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -139,7 +139,7 @@
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -160,7 +160,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(LU:901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -183,7 +183,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -237,7 +237,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -247,7 +247,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -266,7 +266,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -289,7 +289,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -317,7 +317,7 @@
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Close event, cause: CONGESTION
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_WAIT_AUTH}: Cancel: OSMO_FSM_TERM_ERROR
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_WAIT_AUTH}: proc_arq_fsm_done(CONGESTION)
@@ -331,7 +331,7 @@
 - SUBSCR_CONN_TIMEOUT has passed, conn is gone.
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -361,7 +361,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -388,7 +388,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -442,7 +442,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -452,7 +452,7 @@
   lu_result_sent == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -519,7 +519,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 4
@@ -535,13 +535,13 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
   paging_stopped == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_no_authen.err b/tests/msc_vlr/msc_vlr_test_no_authen.err
index 90bf697..d75baba 100644
--- a/tests/msc_vlr/msc_vlr_test_no_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_no_authen.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -33,7 +33,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -99,7 +99,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -109,7 +109,7 @@
   lu_result_sent == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -128,7 +128,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -150,23 +150,23 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -174,10 +174,10 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -185,7 +185,7 @@
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -219,7 +219,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -244,7 +244,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000001) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 6
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21: compl_l3,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -254,7 +254,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -265,15 +265,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -281,11 +281,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -293,7 +293,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -311,7 +311,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -323,12 +323,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -346,7 +346,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -373,7 +373,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -453,7 +453,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -470,15 +470,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -504,7 +504,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(TMSI)=50462976
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -526,23 +526,23 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:50462976){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -550,17 +550,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -594,7 +594,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(TMSI)=50462976
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_NEW}: Updated ID
@@ -619,7 +619,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000002) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 6
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21: compl_l3,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -629,7 +629,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -640,15 +640,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -656,11 +656,11 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -668,7 +668,7 @@
   bssap_clear_sent == 1
 - SMS is done, conn is gone
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -687,7 +687,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(TMSI)=50462976 type=IMSI ATTACH
@@ -712,7 +712,7 @@
 DVLR upd_hlr_vlr_fsm(LU:50462976){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -792,7 +792,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:50462976){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -808,15 +808,15 @@
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:50462976){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -842,7 +842,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=117835012
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -854,12 +854,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -877,7 +877,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -904,7 +904,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -980,7 +980,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -999,16 +999,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1031,7 +1031,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1043,12 +1043,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1066,7 +1066,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1093,7 +1093,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1169,7 +1169,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1178,7 +1178,7 @@
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -1196,7 +1196,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1213,16 +1213,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1246,7 +1246,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1258,12 +1258,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1281,7 +1281,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1301,12 +1301,12 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI-SV)=4234234234234275
 DVLR set IMEISV on subscriber; IMSI=901700000004620 IMEISV=4234234234234275
@@ -1322,7 +1322,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1392,7 +1392,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1402,7 +1402,7 @@
   lu_result_sent == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1421,7 +1421,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1433,12 +1433,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1456,7 +1456,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1476,12 +1476,12 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI-SV)=4234234234234275
 DVLR set IMEISV on subscriber; IMSI=901700000004620 IMEISV=4234234234234275
@@ -1497,7 +1497,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1577,7 +1577,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -1596,16 +1596,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1628,7 +1628,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -1640,12 +1640,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1663,7 +1663,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1683,12 +1683,12 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI-SV)=4234234234234275
 DVLR set IMEISV on subscriber; IMSI=901700000004620 IMEISV=4234234234234275
@@ -1704,7 +1704,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1788,7 +1788,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1805,15 +1805,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1833,7 +1833,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1851,12 +1851,12 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI-SV)=5234234234234276
 DVLR set IMEISV on subscriber; IMSI=901700000004620 IMEISV=5234234234234276
@@ -1872,7 +1872,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1956,7 +1956,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1972,15 +1972,15 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2006,7 +2006,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(TMSI)=117835012
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -2018,12 +2018,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2041,7 +2041,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -2061,12 +2061,12 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_WAIT_IMEISV
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - MS replies with an Identity Response, causes LU to commence with a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI-SV)=4234234234234275
 DVLR set IMEISV on subscriber; IMSI=901700000004620 IMEISV=4234234234234275
@@ -2082,7 +2082,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -2162,7 +2162,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS replies with an Identity Response
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423420
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423420
@@ -2171,7 +2171,7 @@
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: lu_compl_vlr_new_tmsi()
 DVLR lu_compl_vlr_fsm(LU:901700000004620){LU_COMPL_VLR_S_WAIT_IMEI_TMSI}: state_chg to LU_COMPL_VLR_S_WAIT_TMSI_CNF
 - sending LU Accept for MSISDN:46071, with TMSI 0x03020100
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
 - a LU Accept with a new TMSI was sent, waiting for TMSI Realloc Compl
@@ -2189,7 +2189,7 @@
 DRLL subscr MSISDN:46071: Message not permitted for initial conn: SMS:0x01
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:46071: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -2206,16 +2206,16 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -2240,7 +2240,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -2252,12 +2252,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_reject_concurrency.err b/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
index bc14fa4..9cbb58f 100644
--- a/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
+++ b/tests/msc_vlr/msc_vlr_test_reject_concurrency.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -33,7 +33,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -42,7 +42,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -57,15 +57,15 @@
 DVLR vlr_lu_fsm(LU:901700000004620){VLR_ULA_S_IDLE}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
 DREF VLR subscr IMSI:901700000004620 usage decreases to: 1
 DRR 901700000004620: internal error during Location Updating attempt
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
   lu_result_sent == 2
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -130,7 +130,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -140,7 +140,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -165,7 +165,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -192,7 +192,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -200,10 +200,10 @@
 ---
 - Another Location Update Request from the same subscriber on the same conn is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Cannot accept another LU, conn already busy establishing authenticity; extraneous LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -260,7 +260,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -270,7 +270,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -295,7 +295,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -322,7 +322,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -330,7 +330,7 @@
 ---
 - A CM Service Request in the middle of a LU is rejected
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Cannot accept CM Service Request, conn already busy establishing authenticity
@@ -338,7 +338,7 @@
 DMSC msc_tx 3 bytes to IMSI:901700000004620 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_CM_SERV_REJ: 052216
 - DTAP matches expected message
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -397,7 +397,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -407,7 +407,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -432,7 +432,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -459,7 +459,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -467,10 +467,10 @@
 ---
 - An erratic Paging Response is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
-DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000004620: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DMM Ignoring Paging Response, conn already busy establishing authenticity
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -527,7 +527,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -537,7 +537,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -564,7 +564,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -591,7 +591,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -646,7 +646,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -656,7 +656,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -675,7 +675,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -697,27 +697,27 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
 - A LU request on an open conn is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Cannot accept another LU, conn already established; extraneous LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
 ---
 - subscriber detaches
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 3
@@ -728,15 +728,15 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 3 (0x10a)
-DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 3 (0x10a: dtap,cm_service,release)
+DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 2
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -762,7 +762,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -789,7 +789,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -844,7 +844,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -854,7 +854,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -873,7 +873,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -895,30 +895,30 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
 - A second CM Service Request on the same conn is accepted without another auth dance
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM MSISDN:46071: re-using already accepted connection
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Updated ID
 - sending CM Service Accept for MSISDN:46071
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
   llist_count(&net->subscr_conns) == 1
 ---
 - subscriber detaches
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 3
@@ -929,15 +929,15 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 3 (0x10a)
-DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 3 (0x10a: dtap,cm_service,release)
+DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 2
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -963,7 +963,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -990,7 +990,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1045,7 +1045,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1055,7 +1055,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1074,7 +1074,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1096,22 +1096,22 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000004620){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:46071
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9)
+DREF MSISDN:46071: MSC conn use + cm_service == 2 (0x9: compl_l3,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 msc_subscr_conn_is_accepted() == true
 ---
 - An erratic Paging Response on the same conn is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DMM Ignoring Paging Response, conn already established
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   llist_count(&net->subscr_conns) == 1
 ---
 - The original CM Service Request can conclude
@@ -1119,10 +1119,10 @@
   expecting USSD:
   Your extension is 46071
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:46071: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:46071: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -1130,17 +1130,17 @@
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - all requests serviced, conn has been released
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1166,7 +1166,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1193,7 +1193,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1248,7 +1248,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1258,7 +1258,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1289,7 +1289,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1314,7 +1314,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000001) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 6
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21: compl_l3,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -1324,7 +1324,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - conn is still open to wait for SMS ack dance
@@ -1332,23 +1332,23 @@
 ---
 - MS sends erratic LU Request, which is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Cannot accept another LU, conn already established; extraneous LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   lu_result_sent == 0
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -1356,18 +1356,18 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1394,7 +1394,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1421,7 +1421,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1476,7 +1476,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1486,7 +1486,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1517,7 +1517,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1542,7 +1542,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000002) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 6
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21: compl_l3,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -1552,7 +1552,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - conn is still open to wait for SMS ack dance
@@ -1560,28 +1560,28 @@
 ---
 - CM Service Request during open connection is accepted
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM MSISDN:46071: re-using already accepted connection
-DREF MSISDN:46071: MSC conn use + cm_service == 3 (0x2a)
+DREF MSISDN:46071: MSC conn use + cm_service == 3 (0x2a: dtap,cm_service,trans_sms)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Updated ID
 - sending CM Service Accept for MSISDN:46071
-DREF MSISDN:46071: MSC conn use - dtap == 2 (0x28)
+DREF MSISDN:46071: MSC conn use - dtap == 2 (0x28: cm_service,trans_sms)
   cm_service_result_sent == 1
   llist_count(&net->subscr_conns) == 1
   g_conn->received_cm_service_request == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 3 (0x2a)
+DREF MSISDN:46071: MSC conn use + dtap == 3 (0x2a: dtap,cm_service,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 2 (0x28)
+DREF MSISDN:46071: MSC conn use - dtap == 2 (0x28: cm_service,trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 3 (0x2a)
+DREF MSISDN:46071: MSC conn use + dtap == 3 (0x2a: dtap,cm_service,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -1589,15 +1589,15 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0xa)
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:46071: MSC conn use - trans_sms == 2 (0xa: dtap,cm_service)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x8: cm_service)
   dtap_tx_confirmed == 1
 - SMS is done
   llist_count(&net->subscr_conns) == 1
 ---
 - subscriber detaches
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 3
@@ -1608,15 +1608,15 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 3 (0x10a)
-DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102)
+DREF MSISDN:46071: MSC conn use + release == 3 (0x10a: dtap,cm_service,release)
+DREF MSISDN:46071: MSC conn use - cm_service == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:46071 usage increases to: 2
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1642,7 +1642,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -1669,7 +1669,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1724,7 +1724,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -1734,7 +1734,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1765,7 +1765,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -1790,7 +1790,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:46071 callref 40000003) New transaction
 DREF VLR subscr MSISDN:46071 usage increases to: 6
-DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21)
+DREF MSISDN:46071: MSC conn use + trans_sms == 2 (0x21: compl_l3,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -1800,7 +1800,7 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - conn is still open to wait for SMS ack dance
@@ -1808,21 +1808,21 @@
 ---
 - MS sends another erratic Paging Response which is dropped silently
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DMM Ignoring Paging Response, conn already established
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:46071: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:46071: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
@@ -1830,18 +1830,18 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
-DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:46071: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_rest.err b/tests/msc_vlr/msc_vlr_test_rest.err
index d9c69e4..5f2d30f 100644
--- a/tests/msc_vlr/msc_vlr_test_rest.err
+++ b/tests/msc_vlr/msc_vlr_test_rest.err
@@ -27,13 +27,13 @@
 - CLOSE event marks conn_fsm as released and frees the conn
 DMM Subscr_Conn{SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 1 (0x100)
+DREF unknown: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr unknown usage increases to: 2
 DREF VLR subscr unknown usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -55,7 +55,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
@@ -69,15 +69,15 @@
 - sending CM Service Reject for unknown, cause: MS_IDENTITY_NOT_DERVIVABLE
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Event SUBSCR_CONN_E_COMPLETE_LAYER_3 not permitted
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - conn was released
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -99,7 +99,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -126,7 +126,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -192,7 +192,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -202,7 +202,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -222,7 +222,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000004620 type=IMSI ATTACH
@@ -247,7 +247,7 @@
 DVLR upd_hlr_vlr_fsm(LU:901700000004620){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -312,7 +312,7 @@
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -322,7 +322,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000004620){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -341,7 +341,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000004620
 DREF VLR subscr MSISDN:46071 usage increases to: 2
@@ -353,12 +353,12 @@
 DREF freeing VLR subscr MSISDN:46071
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -376,7 +376,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(TMSI)=591536962 type=IMSI ATTACH
@@ -396,7 +396,7 @@
 - DTAP matches expected message
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF TMSI:0x23422342: MSC conn use - compl_l3 == 0 (0x0)
+DREF TMSI:0x23422342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -412,7 +412,7 @@
 DRLL subscr TMSI:0x23422342: Message not permitted for initial conn: SMS:0x01
 - MS tells us the IMSI, causes a GSUP LU request to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
-DREF TMSI:0x23422342: MSC conn use + dtap == 1 (0x2)
+DREF TMSI:0x23422342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMSI)=901700000004620
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
@@ -429,7 +429,7 @@
 DVLR GSUP tx: 04010809710000004026f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000004026f0
 DVLR upd_hlr_vlr_fsm(LU:591536962){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000004620: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -495,7 +495,7 @@
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:46071: MSC conn use + release == 1 (0x100)
+DREF MSISDN:46071: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:46071 usage increases to: 4
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - BSSAP Clear --RAN_GERAN_A--> MS
@@ -505,7 +505,7 @@
 - LU was successful, and the conn has already been closed
   lu_result_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:46071: MSC conn use - release == 0 (0x0)
+DREF MSISDN:46071: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:591536962){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
diff --git a/tests/msc_vlr/msc_vlr_test_umts_authen.err b/tests/msc_vlr/msc_vlr_test_umts_authen.err
index e460fd1..539e721 100644
--- a/tests/msc_vlr/msc_vlr_test_umts_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_umts_authen.err
@@ -6,7 +6,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -30,7 +30,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -52,7 +52,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -75,7 +75,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -144,7 +144,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -161,14 +161,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -188,7 +188,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -212,7 +212,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -230,7 +230,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -254,19 +254,19 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 - sending CM Service Accept for MSISDN:42342
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + cm_service == 2 (0xa: dtap,cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x8: cm_service)
   cm_service_result_sent == 1
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_GERAN_A-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -274,16 +274,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -318,7 +318,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -342,7 +342,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -359,7 +359,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 706f996719ba609c)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -386,14 +386,14 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:42342 callref 40000001) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 5
-DREF MSISDN:42342: MSC conn use + trans_sms == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + trans_sms == 2 (0x22: dtap,trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
 - DTAP --RAN_GERAN_A--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: connection still has active transaction: SMS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   dtap_tx_confirmed == 1
   paging_stopped == 1
 - SMS was delivered, no requests pending for subscr
@@ -404,15 +404,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_GERAN_A-- MS: SMS:0x04
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_GERAN_A-- MS: SMS:0x01
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
@@ -420,18 +420,18 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
   dtap_tx_confirmed == 1
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -450,7 +450,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -462,12 +462,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -485,7 +485,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -509,7 +509,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -531,7 +531,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e41)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -550,7 +550,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=27497388b6cb044648f396aa155b95ef
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -635,7 +635,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -652,14 +652,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -679,7 +679,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -703,7 +703,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   cm_service_result_sent == 0
@@ -721,7 +721,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 7db47cf7f81e4dc7)
 DVLR VLR_Authenticate(CM_SERVICE_REQ:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -740,7 +740,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=1159ec926a50e98c034a6b7d7c9f418d
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -759,7 +759,7 @@
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_WAIT_CIPH}: state_chg to PR_ARQ_S_DONE
 DVLR Process_Access_Request_VLR(CM_SERVICE_REQ:901700000010650){PR_ARQ_S_DONE}: Process Access Request result: PASSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_ACCEPTED
-DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8)
+DREF MSISDN:42342: MSC conn use + cm_service == 1 (0x8: cm_service)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: subscr_conn_fsm_has_active_transactions: still awaiting first request after a CM Service Request
   cm_service_result_sent == 0
@@ -767,10 +767,10 @@
   expecting USSD:
   Your extension is 42342
   MSC <--RAN_UTRAN_IU-- MS: NCSS:0x3b
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0xa: dtap,cm_service)
 DRLL Dispatching 04.08 message NCSS:0x3b (0xb:0x3b)
 DMM MSISDN:42342: rx msg NCSS:0x3b: received_cm_service_request changes to false
-DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2)
+DREF MSISDN:42342: MSC conn use - cm_service == 1 (0x2: dtap)
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
@@ -778,16 +778,16 @@
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: NCSS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(CM_SERVICE_REQ:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -822,7 +822,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
@@ -846,7 +846,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   auth_request_sent == 1
@@ -863,7 +863,7 @@
 DRLL subscr MSISDN:42342: Message not permitted for initial conn: SMS:0x01
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM UMTS AUTHENTICATION RESPONSE (res = 706f996719ba609c)
 DVLR VLR_Authenticate(PAGING_RESP:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -882,7 +882,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=eb50e770ddcc3060101d2f43b6c2b884
 DVLR Process_Access_Request_VLR(PAGING_RESP:901700000010650){PR_ARQ_S_WAIT_AUTH}: state_chg to PR_ARQ_S_WAIT_CIPH
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -905,7 +905,7 @@
 DPAG Calling paging cbfn.
 DCC (ti 00 sub MSISDN:42342 callref 40000002) New transaction
 DREF VLR subscr MSISDN:42342 usage increases to: 5
-DREF MSISDN:42342: MSC conn use + trans_sms == 1 (0x20)
+DREF MSISDN:42342: MSC conn use + trans_sms == 1 (0x20: trans_sms)
 DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_UTRAN_IU
 - DTAP --RAN_UTRAN_IU--> MS: SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
@@ -921,15 +921,15 @@
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
   MSC <--RAN_UTRAN_IU-- MS: SMS:0x04
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x20: trans_sms)
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
   MSC <--RAN_UTRAN_IU-- MS: SMS:0x01
-DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22)
+DREF MSISDN:42342: MSC conn use + dtap == 2 (0x22: dtap,trans_sms)
 DRLL Dispatching 04.08 message SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_UTRAN_IU
@@ -937,18 +937,18 @@
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
-DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2)
-DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - trans_sms == 1 (0x2: dtap)
+DREF MSISDN:42342: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_COMMUNICATING}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 1 (0x100)
+DREF MSISDN:42342: MSC conn use + release == 1 (0x100: release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
   dtap_tx_confirmed == 1
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(PAGING_RESP:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -967,7 +967,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_IMSI_DETACH_IND (0x5:0x1)
 DMM IMSI DETACH INDICATION: MI(IMSI)=901700000010650
 DREF VLR subscr MSISDN:42342 usage increases to: 2
@@ -979,12 +979,12 @@
 DREF freeing VLR subscr MSISDN:42342
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF unknown: MSC conn use + release == 2 (0x101)
+DREF unknown: MSC conn use + release == 2 (0x101: compl_l3,release)
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF unknown: MSC conn use - compl_l3 == 1 (0x100)
+DREF unknown: MSC conn use - compl_l3 == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF unknown: MSC conn use - release == 0 (0x0)
+DREF unknown: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn{SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1002,7 +1002,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1026,7 +1026,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1048,14 +1048,14 @@
   lu_result_sent == 0
 - MS sends Authen Failure with Resync cause, VLR sends GSUP to HLR to resync
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_FAIL
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_FAIL (0x5:0x1c)
 DMM IMSI:901700000010650: MM R99 AUTHENTICATION SYNCH (AUTS = 979498b1f72d3e28c59fa2e72f9c)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_FAIL
 DVLR GSUP tx: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -1079,7 +1079,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = 1df5f0b4f22b696e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP_RESYNC}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1102,7 +1102,7 @@
 DVLR GSUP tx: 04010809710000000156f0
 GSUP --> HLR: OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST: 04010809710000000156f0
 DVLR upd_hlr_vlr_fsm(LU:901700000010650){UPD_HLR_VLR_S_INIT}: state_chg to UPD_HLR_VLR_S_WAIT_FOR_DATA
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -1171,7 +1171,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1188,14 +1188,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1221,7 +1221,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1245,7 +1245,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1267,14 +1267,14 @@
   lu_result_sent == 0
 - MS sends Authen Failure with Resync cause, VLR sends GSUP to HLR to resync
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_FAIL
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_FAIL (0x5:0x1c)
 DMM IMSI:901700000010650: MM R99 AUTHENTICATION SYNCH (AUTS = 979498b1f72d3e28c59fa2e72f9c)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_FAIL
 DVLR GSUP tx: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 GSUP --> HLR: OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST: 08010809710000000156f0260e979498b1f72d3e28c59fa2e72f9c201039fa2f4e3d523d8619a73b4f65c3e14d
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_SAI_RESYNC
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   gsup_tx_confirmed == 1
@@ -1298,7 +1298,7 @@
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends SecurityModeControl
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = 1df5f0b4f22b696e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP_RESYNC}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1317,7 +1317,7 @@
 - sending SecurityModeControl for UE ctx 42 send_ck=0 new_key=1
 - ...ik=8a90c769b7272f3bb7a1c1fbb1ea9349
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_WAIT_CIPH
-DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - dtap == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   security_mode_ctrl_sent == 1
@@ -1402,7 +1402,7 @@
 DREF VLR subscr MSISDN:42342 usage decreases to: 1
 - MS sends TMSI Realloc Complete
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
-DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2)
+DREF MSISDN:42342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:42342
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
@@ -1419,14 +1419,14 @@
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_ACCEPTED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF MSISDN:42342: MSC conn use + release == 2 (0x102)
+DREF MSISDN:42342: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr MSISDN:42342 usage increases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100)
+DREF MSISDN:42342: MSC conn use - dtap == 1 (0x100: release)
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF MSISDN:42342: MSC conn use - release == 0 (0x0)
+DREF MSISDN:42342: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1452,7 +1452,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1476,7 +1476,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1498,7 +1498,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1517,15 +1517,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1550,7 +1550,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1574,7 +1574,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1596,7 +1596,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1615,15 +1615,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1648,7 +1648,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1672,7 +1672,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1694,7 +1694,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e4123)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1713,15 +1713,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1746,7 +1746,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1770,7 +1770,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1792,7 +1792,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM UMTS AUTHENTICATION RESPONSE (res = e229c19e791f2e4123)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1811,15 +1811,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1844,7 +1844,7 @@
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1868,7 +1868,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1890,7 +1890,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts: GERAN reports an SRES mismatch
   MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM GSM AUTHENTICATION RESPONSE (sres = e229c19e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -1909,15 +1909,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - BSSAP Clear --RAN_GERAN_A--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   bssap_clear_sent == 1
 - BSS sends BSSMAP Clear Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)
@@ -1942,7 +1942,7 @@
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DMM Subscr_Conn{SUBSCR_CONN_S_NEW}: Allocated
-DREF unknown: MSC conn use + compl_l3 == 1 (0x1)
+DREF unknown: MSC conn use + compl_l3 == 1 (0x1: compl_l3)
 DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Updated ID
 DMM LOCATION UPDATING REQUEST: MI(IMSI)=901700000010650 type=NORMAL
@@ -1966,7 +1966,7 @@
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_NEEDS_AUTH}: state_chg to VLR_SUB_AS_NEEDS_AUTH_WAIT_AI
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: Received Event SUBSCR_CONN_E_COMPLETE_LAYER_3
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_NEW}: state_chg to SUBSCR_CONN_S_AUTH_CIPH
-DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - compl_l3 == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Awaiting results for Auth+Ciph, overruling event SUBSCR_CONN_E_UNUSED
   lu_result_sent == 0
@@ -1988,7 +1988,7 @@
   lu_result_sent == 0
 - MS sends Authen Response of wrong RES size, VLR thwarts: UTRAN disallows GSM AKA altogether
   MSC <--RAN_UTRAN_IU-- MS: GSM48_MT_MM_AUTH_RESP
-DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2)
+DREF IMSI:901700000010650: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM GSM AUTHENTICATION RESPONSE (sres = e229c19e)
 DVLR VLR_Authenticate(LU:901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
@@ -2007,15 +2007,15 @@
 DVLR vlr_lu_fsm(LU:901700000010650){VLR_ULA_S_WAIT_AUTH}: state_chg to VLR_ULA_S_DONE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: Received Event SUBSCR_CONN_E_CN_CLOSE
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_AUTH_CIPH}: state_chg to SUBSCR_CONN_S_RELEASING
-DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102)
+DREF IMSI:901700000010650: MSC conn use + release == 2 (0x102: dtap,release)
 DREF VLR subscr IMSI:901700000010650 usage increases to: 2
 DREF VLR subscr IMSI:901700000010650 usage decreases to: 1
 - Iu Release --RAN_UTRAN_IU--> MS
-DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100)
+DREF IMSI:901700000010650: MSC conn use - dtap == 1 (0x100: release)
   lu_result_sent == 2
   iu_release_sent == 1
 - RNC sends Iu Release Complete
-DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0)
+DREF IMSI:901700000010650: MSC conn use - release == 0 (0x0: )
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: Received Event SUBSCR_CONN_E_UNUSED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASING}: state_chg to SUBSCR_CONN_S_RELEASED
 DMM Subscr_Conn(LU:901700000010650){SUBSCR_CONN_S_RELEASED}: Terminating (cause = OSMO_FSM_TERM_REGULAR)