[c-nsp] voice call drop on as5400

[a0kunev]

Hi Alex,

this is CAS  with e&m, unfortunatly.

T1s configured as

signaling-class cas test
 profile incoming S<*a<*d<*n

controller T1 7/0:1
 framing esf
 ds0-group 0 timeslots 1-24 type e&m-fgb dtmf dnis
 cas-custom 0
 class test
!
controller T3 7/0
 framing m23
 clock source line
 t1 1-28 controller
!

I dont see much debug info regarding the issue, enabled debugs for:
CAS:
 Channel Associated Signaling debugging is on
Call Management:
 Call Management debugging is on
Call-denial module:
 Call-denial debugging is on
Call Treatment:
 Call treatment action debugging is on

We issue rate is quite high, about 1000 rejections on 5000-6000 calls
every day.

Regards, Andrei

On Tue, Aug 19, 2008 at 4:59 PM, Alex Balashov
<abalashov at evaristesys.com> wrote:
>
> 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
>> _______________________________________________
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>>
>
>
> --
> Alex Balashov
> Evariste Systems
> Web    : http://www.evaristesys.com/
> Tel    : (+1) (678) 954-0670
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>
>