We have a CUCM 7.1 and a 2821 with 2PRI connected to the PSTN.
When calling outbound from an IP Phone 79xx (7911, 7945, etc) to the PSTN we got the following error:
Dec 14 10:18:26.249: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x070D
Cause i = 0x80AC - Requested circuit/channel not available
When calling from a Softphone (CUPC or CIPC) the call works fine. Also when using "csim start" in the gateway it does work fine.
We tried to change the IP address of a 79xx into the Data Vlan as the Softphones, but the problem remains the same.
Does anyone faced a similar problem? Or do you know how to solve it?
I attach the configs and the debug traces.
We have run into problems like this lately, go into the Enterprise Parameters and turn off 'advertize g722), and then make sure that you have a voip peer in the gateway that includes the codec that you want to use, and put an 'incoming called number . (dot)" under that peer, to force calls coming into the router to match that peer.