SIP call fail

[ilana_ilana]

Hello,

We have two sites having CME both are connected to each other via SIP Trunk.

One site (e.g. siteA) is having SCCP phones, other site (e.g. siteB) is having SIP phones.

Calls from Site A to Site B are successful, where calls from Site B to Site A are failing.

Following logs are from Site B:

451056: Nov 30 12:43:58.206: //76677/B5FD59DFBB62/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 488 Not Acceptable Media
Via: SIP/2.0/UDP 10.40.31.7:5060;branch=z9hG4bK2A2D3C70
From: "Stefani Roland" <sip:25360@10.40.31.7>;tag=282A336C-11CF
To: <sip:666@10.40.38.7>;tag=37F92FDC-1860
Date: Mon, 30 Nov 2015 09:43:58 GMT
Call-ID: B674FBC5-967D11E5-BB69D2A8-538F58AD@10.40.31.7
Timestamp: 1448876638
Server: Cisco-SIPGateway/IOS-12.x
CSeq: 101 INVITE
Allow-Events: telephone-event
Reason: Q.850;cause=65
Content-Length: 0

I have configured voice class codecs on both ends and defined it under In & Out dial-peers of both sites still im getting SIP/2.0 488 Not Acceptable Media.

Can any one suggest any solution ?

[Carlo Poggiarelli]

Hi,

can you please send the full output of a debug ccsip message from both VG?

Thanks 

Regards

Carlo

[Nadeem Ahmed]

along with debug please share the show run from both VG too.

Regards

Nadeem Ahmed

[ilana_ilana]

Hello all,

The issue is fixed by configuring transcoder on both the ends.

Appologize I didnt able to gather logs because of site A router health issue. On enabling debug ccsip and ccapi, the router performance went down and all sccp phones were getting unregistered abnormally.

Thank you all for your time and reply.

Regards,

[rothomas2]

Well we are certaint it's a codec issue. Now codec issues can happen due to a range of conditions. We will need debug CCSIP messages from the call to see what codecs were offered on both sides, also a debug voip ccapi inout would be ideal to identify the dialpeers involved, along a show run to review them. 

Robert Thomas Blog.