diff --git a/doc/sequence_charts/voice_call_internal_mncc.msc b/doc/sequence_charts/voice_call_internal_mncc.msc
index 69af60e..898c1ff 100644
--- a/doc/sequence_charts/voice_call_internal_mncc.msc
+++ b/doc/sequence_charts/voice_call_internal_mncc.msc
@@ -13,29 +13,29 @@
 moms =>> momsc	[label="CC SETUP"];
 momsc note momsc	[label="CC starts guard timer (180s)"];
 momsc abox momsc	[label="CC state:\nINITIATED"];
-momsc =>> mncc	[label="MNCC_SETUP_IND"];
+momgw <<= momsc	[label="for CN: CRCX\nrtpbridge/*@msc"];
+momgw =>> momsc	[label="for CN: CRCX OK\nEP-1 CI-1 IP:port-1"];
+momsc =>> mncc	[label="MNCC_SETUP_IND\nIP:port-1"];
 momsc <<= mncc	[label="MNCC_CALL_PROC_REQ"];
 momsc note momsc	[label="CC stops guard timer"];
 momsc note momsc	[label="CC starts guard timer (180s)"];
 momsc abox momsc	[label="CC state:\nMO_CALL_PROC"];
 moms <<= momsc	[label="CC CALL_PROC"];
-momgw <<= momsc	[label="for RAN: CRCX\nrtpbridge/*@msc"];
 momsc <<= mncc	[label="MNCC_LCHAN_MODIFY"];
 momsc note momsc	[label="CC stops guard timer"];
 momsc note momsc	[label="CC starts guard timer (180s)"];
-mtmsc <<= mncc	[label="MNCC_SETUP_REQ"];
+mtmsc <<= mncc	[label="MNCC_SETUP_REQ\nIP:port-1"];
 mtms <<= mtmsc	[label="Paging"];
-momgw =>> momsc	[label="for RAN: CRCX OK\nEP-1 CI-1 IP:port-1"];
+momgw <<= momsc	[label="for RAN: CRCX\nEP-1"];
+momgw =>> momsc	[label="for RAN: CRCX OK\nEP-1 CI-2 IP:port-2"];
 moms <<= momsc	[label="(BSSMAP) ASSIGNMENT_COMMAND"];
-moms =>> momsc	[label="(BSSMAP) Assignment Complete"];
-momgw <<= momsc	[label="for RAN: MDCX\nEP-1 CI-1"];
-momgw =>> momsc	[label="for RAN: MDCX OK\nEP-1 CI-1 IP:port-1"];
-momgw <<= momsc	[label="for CN: CRCX\nEP-1"];
-momgw =>> momsc	[label="for CN: CRCX OK\nEP-1 CI-2 IP:port-2"];
-momsc =>> mncc	[label="MNCC_RTP_CREATE\nIP:port-2"];
 mtms =>> mtmsc	[label="(BSSMAP) Complete Layer 3 Information"];
 mtms =>> mtmsc	[label="RR PAG_RESP"];
 mtms <<= mtmsc	[label="MM AUTH_REQ"];
+moms =>> momsc	[label="(BSSMAP) Assignment Complete"];
+momgw <<= momsc	[label="for RAN: MDCX\nEP-1 CI-2"];
+momsc =>> mncc	[label="MNCC_RTP_CREATE\nIP:port-1"];
+momgw =>> momsc	[label="for RAN: MDCX OK\nEP-1 CI-2 IP:port-2"];
 mtms =>> mtmsc	[label="MM AUTH_RESP"];
 mtms <<= mtmsc	[label="(BSSMAP) CIPHER_MODE_COMMAND"];
 mtms =>> mtmsc	[label="(BSSMAP) Ciphering Mode Complete"];
@@ -47,49 +47,49 @@
 mtms =>> mtmsc	[label="CC CALL_CONF"];
 mtmsc note mtmsc	[label="CC stops timer T303"];
 mtmsc note mtmsc	[label="CC starts timer T310 (30s)"];
+mtmgw <<= mtmsc	[label="for CN: CRCX\nrtpbridge/*@msc"];
 mtmsc abox mtmsc	[label="CC state:\nMO_TERM_CALL_CONF"];
-mtmgw <<= mtmsc	[label="for RAN: CRCX\nrtpbridge/*@msc"];
 mtmsc =>> mncc	[label="MNCC_CALL_CONF_IND"];
 mtmsc <<= mncc	[label="MNCC_LCHAN_MODIFY"];
 mtmsc note mtmsc	[label="CC starts guard timer (180s)"];
-mtmgw =>> mtmsc	[label="for RAN: CRCX OK\nEP-2 CI-3 IP:port-3"];
+mtmgw =>> mtmsc	[label="for CN: CRCX OK\nEP-2 CI-3 IP:port-3"];
+mtmgw <<= mtmsc	[label="for RAN: CRCX\nEP-2"];
+mtmgw =>> mtmsc	[label="for RAN: CRCX OK\nEP-2 CI-4 IP:port-4"];
 mtms <<= mtmsc	[label="(BSSMAP) ASSIGNMENT_COMMAND"];
 mtms =>> mtmsc	[label="(BSSMAP) Assignment Complete"];
-mtmgw <<= mtmsc	[label="for RAN: MDCX\nEP-2 CI-3"];
-mtmgw =>> mtmsc	[label="for RAN: MDCX OK\nEP-2 CI-3 IP:port-3"];
-mtmgw <<= mtmsc	[label="for CN: CRCX\nEP-2"];
-mtmgw =>> mtmsc	[label="for CN: CRCX OK\nEP-2 CI-4 IP:port-4"];
-mtmsc =>> mncc	[label="MNCC_RTP_CREATE\nIP:port-4"];
+mtmgw <<= mtmsc	[label="for RAN: MDCX\nEP-2 CI-4"];
+mtmsc =>> mncc	[label="MNCC_RTP_CREATE\nIP:port-3"];
+mtmgw =>> mtmsc	[label="for RAN: MDCX OK\nEP-2 CI-4 IP:port-4"];
 mtms =>> mtmsc	[label="CC ALERTING"];
 mtmsc note mtmsc	[label="CC stops timer T310"];
 mtmsc note mtmsc	[label="CC starts timer T301 (180s)"];
 mtmsc abox mtmsc	[label="CC state:\nCALL_RECEIVED"];
-mtmsc =>> mncc	[label="MNCC_ALERT_IND"];
-momsc <<= mncc	[label="MNCC_ALERT_REQ"];
+mtmsc =>> mncc	[label="MNCC_ALERT_IND\nIP:port-3"];
+momsc <<= mncc	[label="MNCC_ALERT_REQ\nIP:port-3"];
 momsc note momsc	[label="CC stops guard timer"];
 momsc note momsc	[label="CC starts guard timer (180s)"];
 momsc abox momsc	[label="CC state:\nCALL_DELIVERED"];
+momgw <<= momsc	[label="for CN: MDCX\nEP-1 CI-1"];
 moms <<= momsc	[label="CC ALERTING"];
+momgw =>> momsc	[label="for CN: MDCX OK\nEP-1 CI-1 IP:port-1"];
 mtms =>> mtmsc	[label="CC CONNECT"];
 mtmsc note mtmsc	[label="CC stops timer T301"];
 mtmsc abox mtmsc	[label="CC state:\nCONNECT_REQUEST"];
-mtmsc =>> mncc	[label="MNCC_SETUP_CNF"];
+mtmsc =>> mncc	[label="MNCC_SETUP_CNF\nIP:port-3"];
 mtmsc <<= mncc	[label="MNCC_SETUP_COMPL_REQ"];
 mtmsc note mtmsc	[label="CC stops guard timer"];
 mtmsc note mtmsc	[label="CC starts guard timer (180s)"];
 mtmsc abox mtmsc	[label="CC state:\nACTIVE"];
 mtmsc note mtmsc	[label="CC stops guard timer"];
 mtms <<= mtmsc	[label="CC CONNECT_ACK"];
-momsc <<= mncc	[label="MNCC_SETUP_RSP"];
+momsc <<= mncc	[label="MNCC_SETUP_RSP\nIP:port-3"];
 momsc note momsc	[label="CC stops guard timer"];
 momsc note momsc	[label="CC starts guard timer (180s)"];
 momsc note momsc	[label="CC starts timer T313 (30s)"];
 momsc abox momsc	[label="CC state:\nCONNECT_IND"];
 moms <<= momsc	[label="CC CONNECT"];
-mtmgw <<= mtmsc	[label="for CN: MDCX\nEP-2 CI-4"];
-momgw <<= momsc	[label="for CN: MDCX\nEP-1 CI-2"];
-mtmgw =>> mtmsc	[label="for CN: MDCX OK\nEP-2 CI-4 IP:port-4"];
-momgw =>> momsc	[label="for CN: MDCX OK\nEP-1 CI-2 IP:port-2"];
+mtmgw <<= mtmsc	[label="for CN: MDCX\nEP-2 CI-3"];
+mtmgw =>> mtmsc	[label="for CN: MDCX OK\nEP-2 CI-3 IP:port-3"];
 moms =>> momsc	[label="CC CONNECT_ACK"];
 momsc note momsc	[label="CC stops timer T313"];
 momsc abox momsc	[label="CC state:\nACTIVE"];