CCM Call Disconnect Issue

Unanswered Question
May 7th, 2009
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Hi,


We are currently facing an issue with Callers disconnecting from the PSTN and callstate on the IP Phone shows active. The call flow is as below


PSTN-->Cisco 3845--->CUCM 5.1


Signalling between the Voice GW & CUCM is SIP and the configs seem fine. Whenever the caller disconnects we recv Q931 disconnect with cause value 31 (Normal Unspecified) and Sip bye with Q850 reason = 31 sent to the callmanager and CUCM responds back with a 200 ok. On the IP Phone the call stays active for 30 secs and then disconnects.


CUCM ver 5.1.2.3000-2

IOS 12.4 15 T9 on Cisco 3845 platform.

Any idea what could be causing the problem?


Thanks


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