Inbound SIP Trunk not working - all ckts busy message

Unanswered Question
Jul 6th, 2009


Outbound Calls from this AT&T SIP Trunk work and Inbound Calls used to work, not sure what has changed. Was testing dtmf to CVP when noticed Inbound was no longer working. Inbound calls result in “All Ckts Busy” or a fast busy, but calls are hitting the router as evidenced by attached sip trace so must assume it is an issue with the CUBE. IOS is 12.4(20)T2.

Attached is CCSIP All trace, Looks like perhaps CM is no longer getting the invite and a 503 error is sent back to provider almost right away. Dial-Peers attached as well, desperately need help.



I have this problem too.
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