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I am trying to establish a chat session(MSRP) with two sipclients endpoints by registering to kamailio server(4.0.0), but I am getting 500 Internal server error(Reason: SIP ;text="media stream failed to start" ;cause=500). What might be the problem?? Does it mean that kamailio can not handle msrp session? If yes how to enable it in the server? Please help me in this regard.

Request-Line: INVITE sip:03271485@172.16.7.82:50666 SIP/2.0
Record-Route: sip:172.16.7.201;lr=on
Via: SIP/2.0/UDP 172.16.7.201;branch=z9hG4bKce48.40d19c96.0
Via: SIP/2.0/UDP 172.16.7.46:45669;rport=45669;
branch=z9hG4bKPj28UvXKngB3PjBBmoyrTFZXoeNcVx4oIm
Max-Forwards: 16
From: sip:511@172.16.7.201;tag=-4TgMXfcfaV0Cj5VnCIxOkL1QmHji8PL
To: sip:411@172.16.7.201
Contact: sip:80945273@172.16.7.46:45669
Call-ID: bpOWizGe-SHsjIZXSLKptnnDBVi7dMnY
CSeq: 3687 INVITE
Allow: SUBSCRIBE, NOTIFY, PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, MESSAGE, REFER
Supported: 100rel, replaces, norefersub, gruu
User-Agent: sipsimple 1.3.0
Content-Type: application/sdp
Content-Length:297
v=0
o=- 3612147894 3612147894 IN IP4 172.16.7.46
s=sipsimple 1.3.0
c=IN IP4 172.16.7.46
t= 0 0
m=message 2855 TCP/TLS/MSRP *
a=path:msrps://172.16.7.46:2855/7ad200ec7137e5ed1a58;tcp
a=accept-types:message/cpim text/* application/im-iscomposing+xml
a=accept-wrapped-types:*
a=setup:active
Status-Line: SIP/2.0 500 Internal Server Error
Via: SIP/2.0/UDP 172.16.7.201;received=172.16.7.201;branch=z9hG4bKce48.40d19c96
Via: SIP/2.0/UDP 172.16.7.46:45669;rport=45669 branch=z9hG4bKPj28UvXKngB3PjBBmoyrTFZXoeNcVx4oIm
Record-Route: <sip:172.16.7.201;lr>
Call-ID: bpOWizGe-SHsjIZXSLKptnnDBVi7dMnY
From: sip:511@172.16.7.201;tag=-4TgMXfcfaV0Cj5VnCIxOkL1QmHji8PL
To: sip:411@172.16.7.201;tag=XKuUttlVFnfBakd5ATHkw9nhmIEOtCL2
CSeq:3687 INVITE
Server: sipsimple 1.3.0
AllowSUBSCRIBE, NOTIFY, PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, MESSAGE, REFER
Reason: SIP ;text=\"media stream failed to start\" ;cause=500
Content-Length:  0
Stephen Ostermiller
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user3755959
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1 Answers1

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Though I could not establish MSRP session through a relay, I could establish the session between the endpoints. In Sipclients, msrp.connection_model should be set to "acm" for end to end msrp session. So I can say that it is not a problem with kamailio server

user3755959
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