diff --git a/tests/msc_vlr/msc_vlr_test_gsm_authen.err b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
index 65370be..b6b84ed 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_authen.err
+++ b/tests/msc_vlr/msc_vlr_test_gsm_authen.err
@@ -1,9 +1,9 @@
 ===== test_gsm_authen
 - Location Update request causes a GSUP Send Auth Info request to HLR
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -55,19 +55,19 @@
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF IMSI:901700000004620: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(IMSI:901700000004620) received res: 2d 8b 2c 3e 
@@ -162,10 +162,10 @@
   llist_count(&net->subscr_conns) == 0
 ---
 - after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector
-  rx from MS: pdisc=0x05 msg_type=0x24
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000004620
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
@@ -195,18 +195,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:46071) received res: 20 bd e2 40 
@@ -242,16 +242,16 @@
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
-  rx from MS: pdisc=0x0b msg_type=0x3b
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_NC_SS:0x3b
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=11
-DMM MSISDN:46071 pdisc=11 msg_type=0x3b: received_cm_service_request changes to false
+DRLL Dispatching 04.08 message GSM48_PDISC_NC_SS:0x3b (0xb:0x3b)
+DMM MSISDN:46071: rx msg GSM48_PDISC_NC_SS:0x3b: received_cm_service_request changes to false
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
 DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_NC_SS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
@@ -288,10 +288,10 @@
   llist_count(&vsub->cs.requests) == 1
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - MS replies with Paging Response, and VLR sends Auth Request with third key
-  rx from MS: pdisc=0x06 msg_type=0x27
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=6
+DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000004620
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
@@ -320,18 +320,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:46071) received res: a2 95 14 ae 
@@ -361,7 +361,7 @@
 DREF VLR subscr MSISDN:46071 usage increases to: 5
 DREF MSISDN:46071: MSC conn use + 1 == 3
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
@@ -378,9 +378,9 @@
 - conn is still open to wait for SMS ack dance
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
-  rx from MS: pdisc=0x89 msg_type=0x04
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x04
 DREF MSISDN:46071: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
@@ -388,12 +388,12 @@
 DREF MSISDN:46071: MSC conn use - 1 == 2
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
-  rx from MS: pdisc=0x89 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x01
 DREF MSISDN:46071: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 0904
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x04: 0904
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
@@ -418,10 +418,10 @@
   llist_count(&net->subscr_conns) == 0
 ---
 - subscriber detaches
-  rx from MS: pdisc=0x05 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+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
 DMM IMSI DETACH for MSISDN:46071
@@ -439,10 +439,10 @@
 
 ===== test_gsm_authen_tmsi
 - Location Update request causes a GSUP Send Auth Info request to HLR
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -494,19 +494,19 @@
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF IMSI:901700000004620: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(IMSI:901700000004620) received res: 2d 8b 2c 3e 
@@ -577,14 +577,14 @@
   lu_result_sent == 1
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - even though the TMSI is not acked, we can already find the subscr with it
 DREF VLR subscr MSISDN:46071 usage increases to: 2
   vsub != NULL == 1
@@ -593,9 +593,9 @@
   vsub->tmsi == 0xffffffff
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
-  rx from MS: pdisc=0x05 msg_type=0x5b
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
@@ -637,10 +637,10 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 ---
 - after a while, a new conn sends a CM Service Request using above TMSI. VLR responds with Auth Req, 2nd auth vector
-  rx from MS: pdisc=0x05 msg_type=0x24
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(TMSI)=50462976
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_INIT}: Allocated
@@ -670,18 +670,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 20bde240)
 DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:46071) received res: 20 bd e2 40 
@@ -717,16 +717,16 @@
 - a USSD request is serviced
   expecting USSD:
   Your extension is 46071
-  rx from MS: pdisc=0x0b msg_type=0x3b
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_NC_SS:0x3b
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=11
-DMM MSISDN:46071 pdisc=11 msg_type=0x3b: received_cm_service_request changes to false
+DRLL Dispatching 04.08 message GSM48_PDISC_NC_SS:0x3b (0xb:0x3b)
+DMM MSISDN:46071: rx msg GSM48_PDISC_NC_SS:0x3b: received_cm_service_request changes to false
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
 DMM MSISDN:46071: MSISDN = 46071
 DMSC msc_tx 43 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_NC_SS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d27310cd06bbc51a0d
 - DTAP matches expected message
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
@@ -763,10 +763,10 @@
   llist_count(&vsub->cs.requests) == 1
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 - MS replies with Paging Response using TMSI, and VLR sends Auth Request with third key
-  rx from MS: pdisc=0x06 msg_type=0x27
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=6
+DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(TMSI)=50462976
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_INIT}: Allocated
@@ -795,18 +795,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = a29514ae)
 DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:46071) received res: a2 95 14 ae 
@@ -836,7 +836,7 @@
 DREF VLR subscr MSISDN:46071 usage increases to: 5
 DREF MSISDN:46071: MSC conn use + 1 == 3
 DMSC msc_tx 91 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x01: 09015801000791447758100650004c0005806470f1000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 4
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
@@ -853,9 +853,9 @@
 - conn is still open to wait for SMS ack dance
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
-  rx from MS: pdisc=0x89 msg_type=0x04
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x04
 DREF MSISDN:46071: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
@@ -863,12 +863,12 @@
 DREF MSISDN:46071: MSC conn use - 1 == 2
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
-  rx from MS: pdisc=0x89 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x01
 DREF MSISDN:46071: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 0904
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x04: 0904
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 3
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
@@ -894,10 +894,10 @@
 ---
 - subscriber sends LU Request, this time with the TMSI
 - Location Update request causes an Auth Req to MS
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(50462976){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -926,9 +926,9 @@
   auth_request_sent == 1
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:46071: MM GSM AUTHENTICATION RESPONSE (sres = 5afc8d72)
 DVLR VLR_Authenticate(50462976){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:46071) received res: 5a fc 8d 72 
@@ -999,14 +999,14 @@
   lu_result_sent == 1
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - even though the TMSI is not acked, we can already find the subscr with it
 DREF VLR subscr MSISDN:46071 usage increases to: 3
   vsub != NULL == 1
@@ -1015,9 +1015,9 @@
   vsub->tmsi == 0x03020100
 DREF VLR subscr MSISDN:46071 usage decreases to: 2
 - MS sends TMSI Realloc Complete
-  rx from MS: pdisc=0x05 msg_type=0x5b
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(50462976){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(50462976){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
@@ -1058,10 +1058,10 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 ---
 - subscriber detaches, using new TMSI
-  rx from MS: pdisc=0x05 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+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
 DMM IMSI DETACH for MSISDN:46071
@@ -1079,10 +1079,10 @@
 
 ===== test_gsm_authen_imei
 - Location Update request causes a GSUP Send Auth Info request to HLR
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -1134,19 +1134,19 @@
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF IMSI:901700000004620: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(IMSI:901700000004620) received res: 2d 8b 2c 3e 
@@ -1209,7 +1209,7 @@
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_WAIT_IMEI
 DMSC msc_tx 3 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 051802
+- DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051802
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
@@ -1220,18 +1220,18 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS replies with an Identity Response
-  rx from MS: pdisc=0x05 msg_type=0x59
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423423
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423423
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_ID_IMEI
@@ -1273,10 +1273,10 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 ---
 - subscriber detaches
-  rx from MS: pdisc=0x05 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+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
 DMM IMSI DETACH for MSISDN:46071
@@ -1294,10 +1294,10 @@
 
 ===== test_gsm_authen_tmsi_imei
 - Location Update request causes a GSUP Send Auth Info request to HLR
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(901700000004620){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -1349,19 +1349,19 @@
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr IMSI:901700000004620: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF IMSI:901700000004620: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000004620: MM GSM AUTHENTICATION RESPONSE (sres = 2d8b2c3e)
 DVLR VLR_Authenticate(901700000004620){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(IMSI:901700000004620) received res: 2d 8b 2c 3e 
@@ -1424,7 +1424,7 @@
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: Received Event LU_COMPL_VLR_E_SUB_PRES_COMPL
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_SUB_PRES}: state_chg to LU_COMPL_VLR_S_WAIT_IMEI_TMSI
 DMSC msc_tx 3 bytes to MSISDN:46071 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 051802
+- DTAP --RAN_GERAN_A--> MS: GSM48_MT_MM_ID_REQ: 051802
 - DTAP matches expected message
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 <-- GSUP rx OSMO_GSUP_MSGT_UPDATE_LOCATION_RESULT: vlr_gsupc_read_cb() returns 0
@@ -1435,18 +1435,18 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS replies with an Identity Response
-  rx from MS: pdisc=0x05 msg_type=0x59
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_ID_RESP
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
 DMM IDENTITY RESPONSE: MI(IMEI)=423423423423423
 DVLR set IMEI on subscriber; IMSI=901700000004620 IMEI=423423423423423
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_ID_IMEI
@@ -1461,14 +1461,14 @@
   lu_result_sent == 1
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:46071: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:46071: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - even though the TMSI is not acked, we can already find the subscr with it
 DREF VLR subscr MSISDN:46071 usage increases to: 2
   vsub != NULL == 1
@@ -1477,9 +1477,9 @@
   vsub->tmsi == 0xffffffff
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 - MS sends TMSI Realloc Complete
-  rx from MS: pdisc=0x05 msg_type=0x5b
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_TMSI_REALL_COMPL
 DREF MSISDN:46071: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_TMSI_REALL_COMPL (0x5:0x1b)
 DMM TMSI Reallocation Completed. Subscriber: MSISDN:46071
 DVLR vlr_lu_fsm(901700000004620){VLR_ULA_S_WAIT_LU_COMPL}: Received Event VLR_ULA_E_NEW_TMSI_ACK
 DVLR lu_compl_vlr_fsm(901700000004620){LU_COMPL_VLR_S_WAIT_TMSI_CNF}: Received Event LU_COMPL_VLR_E_NEW_TMSI_ACK
@@ -1519,10 +1519,10 @@
 DREF VLR subscr MSISDN:46071 usage decreases to: 1
 ---
 - subscriber detaches, using TMSI
-  rx from MS: pdisc=0x05 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+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
 DMM IMSI DETACH for MSISDN:46071
@@ -1540,10 +1540,10 @@
 
 ===== test_gsm_milenage_authen
 - Location Update request causes a GSUP Send Auth Info request to HLR
-  rx from MS: pdisc=0x05 msg_type=0x08
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_LOC_UPD_REQUEST
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_LOC_UPD_REQUEST (0x5:0x8)
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_INIT}: Allocated
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_INIT}: Received Event SUBSCR_CONN_E_START
@@ -1586,9 +1586,9 @@
   auth_request_sent == 1
   lu_result_sent == 0
 - MS sends Authen Response, VLR accepts and sends GSUP LU Req to HLR
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF IMSI:901700000010650: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM IMSI:901700000010650: MM GSM AUTHENTICATION RESPONSE (sres = 9b36efdf)
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(IMSI:901700000010650) received res: 9b 36 ef df 
@@ -1683,10 +1683,10 @@
   llist_count(&net->subscr_conns) == 0
 ---
 - after a while, a new conn sends a CM Service Request. VLR responds with Auth Req, 2nd auth vector
-  rx from MS: pdisc=0x05 msg_type=0x24
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_CM_SERV_REQ
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_CM_SERV_REQ (0x5:0x24)
 DMM <- CM SERVICE REQUEST serv_type=0x08 MI(IMSI)=901700000010650
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_INIT}: Allocated
@@ -1716,18 +1716,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts with a CM Service Accept
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:42342: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 85aa3130)
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:42342) received res: 85 aa 31 30 
@@ -1763,16 +1763,16 @@
 - a USSD request is serviced
   expecting USSD:
   Your extension is 42342
-  rx from MS: pdisc=0x0b msg_type=0x3b
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_NC_SS:0x3b
 DREF MSISDN:42342: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=11
-DMM MSISDN:42342 pdisc=11 msg_type=0x3b: received_cm_service_request changes to false
+DRLL Dispatching 04.08 message GSM48_PDISC_NC_SS:0x3b (0xb:0x3b)
+DMM MSISDN:42342: rx msg GSM48_PDISC_NC_SS:0x3b: received_cm_service_request changes to false
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM USSD: Own number requested
 DMM MSISDN:42342: MSISDN = 42342
 DMSC msc_tx 43 bytes to MSISDN:42342 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_NC_SS:0x2a: 8b2a1c27a225020100302002013b301b04010f0416d9775d0e2ae3e965f73cfd7683d273104d36a3c91a0d
 - DTAP matches expected message
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: bump: releasing conn
@@ -1809,10 +1809,10 @@
   llist_count(&vsub->cs.requests) == 1
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 - MS replies with Paging Response, and VLR sends Auth Request with third key
-  rx from MS: pdisc=0x06 msg_type=0x27
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_RR_PAG_RESP
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=6
+DRLL Dispatching 04.08 message GSM48_MT_RR_PAG_RESP (0x6:0x27)
 DRR PAGING RESPONSE: MI(IMSI)=901700000010650
 DREF unknown: MSC conn use + 1 == 2
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_INIT}: Allocated
@@ -1841,18 +1841,18 @@
 - needs auth, not yet accepted
 msc_subscr_conn_is_accepted() == false
   requests shall be thwarted
-DRLL Dispatching 04.08 message, pdisc=3
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x03 msg_type=0x05
-DRLL Dispatching 04.08 message, pdisc=5
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x05 msg_type=0x33
-DRLL Dispatching 04.08 message, pdisc=6
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x06 msg_type=0x19
-DRLL Dispatching 04.08 message, pdisc=9
-DRLL subscr MSISDN:42342: Message not permitted for initial conn: pdisc=0x09 msg_type=0x01
+DRLL Dispatching 04.08 message GSM48_MT_CC_SETUP (0x3:0x5)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_MT_CC_SETUP
+DRLL Dispatching 04.08 message unknown 0x33 (0x5:0x33)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: unknown 0x33
+DRLL Dispatching 04.08 message GSM48_MT_RR_SYSINFO_1 (0x6:0x19)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_MT_RR_SYSINFO_1
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
+DRLL subscr MSISDN:42342: Message not permitted for initial conn: GSM48_PDISC_SMS:0x01
 - MS sends Authen Response, VLR accepts and sends pending SMS
-  rx from MS: pdisc=0x05 msg_type=0x54
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_AUTH_RESP
 DREF MSISDN:42342: MSC conn use + 1 == 2
-DRLL Dispatching 04.08 message, pdisc=5
+DRLL Dispatching 04.08 message GSM48_MT_MM_AUTH_RESP (0x5:0x14)
 DMM MSISDN:42342: MM GSM AUTHENTICATION RESPONSE (sres = 69d5f9fb)
 DVLR VLR_Authenticate(901700000010650){VLR_SUB_AS_WAIT_RESP}: Received Event VLR_AUTH_E_MS_AUTH_RESP
 DVLR SUBSCR(MSISDN:42342) received res: 69 d5 f9 fb 
@@ -1882,7 +1882,7 @@
 DREF VLR subscr MSISDN:42342 usage increases to: 5
 DREF MSISDN:42342: MSC conn use + 1 == 3
 DMSC msc_tx 91 bytes to MSISDN:42342 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x01: 09015801000791447758100650004c0005802443f2000007101000000000445079da1e1ee7416937485e9ea7c965373d1d6683c270383b3d0ed3d36ff71c949e83c22072799e9687c5ec32a81d96afcbf4b4fb0c7ac3e9e9b7db05
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 4
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_BUMP
@@ -1899,9 +1899,9 @@
 - conn is still open to wait for SMS ack dance
   llist_count(&net->subscr_conns) == 1
 - MS replies with CP-ACK for received SMS
-  rx from MS: pdisc=0x89 msg_type=0x04
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x04
 DREF MSISDN:42342: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x04 (0x9:0x4)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_ACCEPTED}: state_chg to SUBSCR_CONN_S_COMMUNICATING
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_BUMP
@@ -1909,12 +1909,12 @@
 DREF MSISDN:42342: MSC conn use - 1 == 2
   llist_count(&net->subscr_conns) == 1
 - MS also sends RP-ACK, MSC in turn sends CP-ACK for that
-  rx from MS: pdisc=0x89 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_PDISC_SMS:0x01
 DREF MSISDN:42342: MSC conn use + 1 == 3
-DRLL Dispatching 04.08 message, pdisc=9
+DRLL Dispatching 04.08 message GSM48_PDISC_SMS:0x01 (0x9:0x1)
 DMM Subscr_Conn(901700000010650){SUBSCR_CONN_S_COMMUNICATING}: Received Event SUBSCR_CONN_E_COMMUNICATING
 DMSC msc_tx 2 bytes to MSISDN:42342 via RAN_GERAN_A
-- DTAP --RAN_GERAN_A--> MS: 0904
+- DTAP --RAN_GERAN_A--> MS: GSM48_PDISC_SMS:0x04: 0904
 - DTAP matches expected message
 DREF VLR subscr MSISDN:42342 usage decreases to: 3
 DREF VLR subscr MSISDN:42342 usage decreases to: 2
@@ -1939,10 +1939,10 @@
   llist_count(&net->subscr_conns) == 0
 ---
 - subscriber detaches
-  rx from MS: pdisc=0x05 msg_type=0x01
+  MSC <--RAN_GERAN_A-- MS: GSM48_MT_MM_IMSI_DETACH_IND
   new conn
 DREF unknown: MSC conn use + 1 == 1
-DRLL Dispatching 04.08 message, pdisc=5
+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
 DMM IMSI DETACH for MSISDN:42342