I have a CUCM 8.6 integrated to CUC 8.6 via SIP. All my features are running properly, however when I try to call the VM Pilot from the PSTN I got a message that the user is busy on my gateway:
Calling Party Number i = 0x2183, '11974954XXX' Plan:ISDN, Type:National Called Party Number i = 0x81, '65XX' Plan:ISDN, Type:Unknown Oct 10 11:45:32.715 gmt: ISDN Se0/1/0:15 Q931: Received SETUP callref = 0xA49B callID = 0x0C82 switch = primary-net5 interface = User
Oct 10 11:45:32.719 gmt: ISDN Se0/1/0:15 Q931: TX -> CALL_PROC pd = 8 callref = 0xA49B Channel ID i = 0xA9838C Exclusive, Channel 12 Oct 10 11:45:32.831 gmt: ISDN Se0/1/0:15 Q931: TX -> ALERTING pd = 8 callref = 0xA49B Oct 10 11:45:32.891 gmt: ISDN Se0/1/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0xA49B Cause i = 0x8091 - User busy Oct 10 11:45:32.951 gmt: ISDN Se0/1/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x249B
Just to add more info, I have another service using the same SIP TRUNK into the Unity that is AA that is working fine. All calls from PSTN is completed.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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