[cisco-voip] SIP 500 Error on CUBE and CUCMBE

Tue Sep 3 11:29:17 EDT 2013

See; m=audio 19426 RTP/AVP 18 101

The 18 equals G729, the 101 is related to DTMF.

You should see AVP 0 101 for G711.

Watch your debug ccsip messages for the codecs being sent in the SDP.  It looks like you have a mismatch, I wasn't clear the direction of the below SIP packet (inbound vs outbound) but it's not showing G711 as you indicated is your codec. Which would requires a Transcoder.

https://supportforums.cisco.com/docs/DOC-27105

From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Kenneth Hayes
Sent: Sunday, September 01, 2013 10:57 AM
To: Cisco VoIPoE List
Subject: [cisco-voip] SIP 500 Error on CUBE and CUCMBE

I posted this on the Cisco forums but I wanted to reach out to you
guys here as well.

So Inbound calls works fine with no issues, however outbound I'm
getting a busy signal when I dial out to the PSTN, not your typical
CSS fast busy but busy like someone who does not have call waiting.
Here are the debugs below.

*Sep 1 15:33:16.855: //10/38360D000000/SIP/Msg/ccsipDisplayMsg:

Sent:

SIP/2.0 500 Internal Server Error

Via: SIP/2.0/UDP 192.168.1.8:5060;branch=z9hG4bK12d271b8c5e

From: "user - 1000"
<sip:2089013875 at 192.168.1.8>;tag=645~82127680-9903-4752-ad60-3545686b7a7f-25789895

To: <sip:+17705000140 at 192.168.1.3>;tag=1DD304-1CA2

Date: Sun, 01 Sep 2013 15:33:16 GMT

Call-ID: 38360d00-2231532b-11c-801a8c0 at 192.168.1.8<mailto:38360d00-2231532b-11c-801a8c0 at 192.168.1.8>

CSeq: 101 INVITE

Allow-Events: telephone-event

Server: Cisco-SIPGateway/IOS-12.x

Reason: Q.850;cause=44

Content-Length: 0

192.168.1.3= CUBE

192.168.1.8= CUCMBE

v=0

o=CiscoSystemsCCM-SIP 645 1 IN IP4 192.168.1.8

s=SIP Call

c=IN IP4 192.168.1.3

t=0 0

m=audio 19426 RTP/AVP 18 101

a=rtpmap:18 G729/8000

a=ptime:20

a=fmtp:18 annexb=no

a=rtpmap:101 telephone-event/8000

a=fmtp:101 0-15

SIP trunk between CUCMBE and CUBE are MTP codec method is 711ulaw, in
my Regions my CUBE is set to g729r8, and phones are set to 711ulaw.
I'm not sure what's happening but it's very frustrating.

Anyone can be of assistance?
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