[c-nsp] voice call drop on as5400

[Alex Balashov]

Is there anything that be gleaned from either the debug on the SIP side
or the ISDN (are these PRIs?) side?  ("debug isdn q931")

On Tue, August 19, 2008 8:36 am, a0kunev wrote:
> Hello
>
> I would like to share the problem we recently got on our network. We have
> DS3 coming to as5400, that converting PSTN calls to VOIP. We're handling
> only incoming calls, so the dial-pear config is simple, one voice and one
> voip provider. Recently we've started receiving complains from our
> customers on dead air and drops during their conferences. The issues
> looked like this - person dialed to the DID and nobody answered during
> 10-120 secounds, then the call terminated by timeout.
>
> recently we're able to reproduce this, with debug 'call-mgmnt' it's
> dumping the following on console:
> Aug 19 11:08:06.478: msg_to_calls_mgmt: msg type CPM_VOICE_CALL_MOD_REJ
> received
> Aug 19 11:08:06.478: msg_to_calls_mgmt: msg type CPM_VOICE_CALL_MOD_REJ
> received
> Aug 19 11:08:06.478: msg_to_calls_mgmt: msg type CPM_VOICE_CALL_MOD_REJ
> received
> Aug 19 11:08:06.478: msg_to_calls_mgmt: msg type CPM_VOICE_CALL_MOD_REJ
> received
> Aug 19 11:08:06.482: from Trunk(7): Bad CID 2A3(2A7) s3/p85 u1/c7 event 3
> Aug 19 11:08:06.482: from Trunk(7): Bad CID 2A4(2AB) s3/p86 u1/c6 event 3
> Aug 19 11:08:06.486: from Trunk(7): Bad CID 2A5(2A8) s3/p87 u1/c8 event 3
> Aug 19 11:08:06.486: from Trunk(7): Bad CID 2A6(2AB) s3/p88 u1/c6 event 3
>
> I've checked with tcpdump cisco do not send anything to IP bridge to
> establish the call at that time. Telco says they see a lot of rejected
> calls from our side, but there is nothing on our end(I have not seen yet)
>
> as5400 were recently updated to 12.4(9)T4.
>
> Please advise on how to debug this problem.
> regards, Andrei
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>


-- 
Alex Balashov
Evariste Systems
Web    : http://www.evaristesys.com/
Tel    : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599