Hi There,
The Asterisk server is originally sending an INVITE message to the Cisco VGW with a lot of different codecs being offered (including and additional m line for video).
*Jan 27 10:54:32.380: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
INVITE sip:994125555555@10.10.100.50:5060 SIP/2.0
Via: SIP/2.0/UDP 10.10.10.10:5060;branch=z9hG4bK00e67cff
Max-Forwards: 70
From: <sip:121234567@10.10.10.10>;tag=as2dc40b5a
To: <sip:994125555555@10.10.100.50:5060>
Contact: <sip:121234567@10.10.10.10:5060>
Call-ID: 1b6627780b08c7df73fc9d66001ff970@10.10.10.10:5060
CSeq: 102 INVITE
User-Agent: Asterisk PBX
Date: Fri, 27 Jan 2017 10:09:36 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
Remote-Party-ID: "121234567" <sip:121234567@10.10.10.10>;party=calling;privacy=off;screen=no
Content-Type: application/sdp
Content-Length: 516
v=0
o=root 957168965 957168965 IN IP4 10.10.10.10
s=Asterisk PBX 11.17.1
c=IN IP4 10.10.10.10
b=CT:10240
t=0 0
m=audio 59792 RTP/AVP 0 9 3 18 8 101
a=rtpmap:0 PCMU/8000
a=rtpmap:9 G722/8000
a=rtpmap:3 GSM/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv
m=video 49946 RTP/AVP 99
a=rtpmap:99 H264/90000
a=fmtp:99 redundant-pic-cap=0;parameter-add=0;packetization-mode=0;level-asymmetry-allowed=0
a=sendrecv
The Cisco gateway then sends a "500 Internal Server Error" message with the cause code of 127.
*Jan 27 10:54:32.384: //267264/D162593A861C/SIP/Msg/ccsipDisplayMsg:
Sent:
SIP/2.0 500 Internal Server Error
Via: SIP/2.0/UDP 10.10.10.10:5060;branch=z9hG4bK00e67cff
From: <sip:121234567@10.10.10.10>;tag=as2dc40b5a
To: <sip:994125555555@10.10.100.50:5060>;tag=332D0BD8-173D
Date: Fri, 27 Jan 2017 10:54:32 GMT
Call-ID: 1b6627780b08c7df73fc9d66001ff970@10.10.10.10:5060
CSeq: 102 INVITE
Allow-Events: telephone-event
Reason: Q.850;cause=127
Server: Cisco-SIPGateway/IOS-12.x
Content-Length: 0
The cause code of 127 indicates that there is some sort of inter-working issue that the gateway can not solve.
Would it be possible for you to try and disabling all of those extra codecs which are being offered in the initial INVITE message from Asterisk to the Cisco VGW?
Other next steps would be:
- Make another test call with the following debugs enabled:
- debug ccsip messages
- debug voip ccapi inout
