Interface between 3825 with T1 Multiflex card and Avaya Definity PBX. Link worked fine as a DSO group. Changed to PRI, now cannot complete calls. About 4 seconds of dead air and then reorder tone. Q921 shows Multiframe established. Q931 debug is below
debug isdn q931
debug isdn q931 is ON.
3825-1#debug isdn q931
debug isdn q931 is ON.
*Jan 24 16:34:29.185: ISDN Se0/0/0:23 Q931: Applying typeplan for sw-type 0xD is 0x0 0x0, Calling num 1123
*Jan 24 16:34:29.185: ISDN Se0/0/0:23 Q931: Applying typeplan for sw-type 0xD is 0x0 0x0, Called num 4345
Yes, I have already been down the Q921 road with the TAC. Output is below. TAC basically told me the same thing - check with your PBX engineer. What I am hoping for is something more specific to tell my PBX engineer (who is not overly excited about this VoIP connection to begin with).
3825-1(config)# debug isdn q921
debug isdn q921 is ON.
Enter configuration commands, one per line. End with CNTL/Z.
It looks like layer 2 is fine, so the issue is almost certainly on the PBX - it should respond to the SETUP message with either a setup-ack, call proceeding, progress or alerting message within milliseconds.
It could be due to an ISDN switch type mismatch or some other PBX setting. There is a lot of material relating to integration of Avaya Definity PBX's with Cisco gear on Cisco.Com - just put in 'avaya definity' in the search box.
I found this note that has screen shots of the PBX config - it may be what your PBX tech needs.
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