Hi The 488 response is what I get when I connect our office PBX (Alcatel-Lucent OmniPCX Enterprise 9.0 - AKA OXE) to Microsoft's Office Communication Server R2 via SIP and call from the OXE to OCS (the reverse way works just fine.
I fired up Wireshark and this is what happens between the two systems. Actors: caller: 3462 (10.145.26.27) on PBX 10.145.27.72 (OXE) Mediation Server: 10.145.206.156 (that's the server that translates G.711 to Microsoft's proprietary RTAudio codec) INVITE sip:[email protected];transport=TCP;user=phone SIP/2.0 Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, SUBSCRIBE, OPTIONS, UPDATE, INFO Supported: replaces,timer,100rel User-Agent: OmniPCX Enterprise R9.0 h1.301.25 Session-Expires: 1800;refresher=uac Min-SE: 900 P-Asserted-Identity: "Tarzis Kessler" <sip:[email protected];user=phone> Content-Type: application/sdp To: <sip:[email protected];user=phone> From: "Tarzis Kessler" <sip:[email protected]>;tag=a46f56845e2649610af4db5cbb5864ba Contact: <sip:10.145.27.72;transport=TCP> Call-ID: [email protected] CSeq: 1993218136 INVITE Via: SIP/2.0/TCP 10.145.27.72;branch=z9hG4bK1b582e17fe997251482147f190c49344 Max-Forwards: 70 Content-Length: 316 v=0 o=OXE 1233842864 1233842864 IN IP4 10.145.27.72 s=abs c=IN IP4 10.145.26.27 t=0 0 m=audio 32514 RTP/AVP 8 0 4 97 a=sendrecv a=rtpmap:8 PCMA/8000 a=ptime:20 a=maxptime:30 a=rtpmap:0 PCMU/8000 a=ptime:20 a=maxptime:30 a=rtpmap:4 G723/8000 a=ptime:30 a=maxptime:30 a=rtpmap:97 telephone-event/8000 SIP/2.0 100 Trying FROM: "Tarzis Kessler"<sip:[email protected]>;tag=a46f56845e2649610af4db5cbb5864ba TO: <sip:[email protected];user=phone> CSEQ: 1993218136 INVITE CALL-ID: [email protected] VIA: SIP/2.0/TCP 10.145.27.72;branch=z9hG4bK1b582e17fe997251482147f190c49344 CONTENT-LENGTH: 0 SIP/2.0 488 Invalid incoming Gateway SDP: Invalid media FROM: "Tarzis Kessler"<sip:[email protected]>;tag=a46f56845e2649610af4db5cbb5864ba TO: <sip:[email protected];user=phone>;epid=3CAD90C5CE;tag=43d88de011 CSEQ: 1993218136 INVITE CALL-ID: [email protected] VIA: SIP/2.0/TCP 10.145.27.72;branch=z9hG4bK1b582e17fe997251482147f190c49344 CONTENT-LENGTH: 0 SERVER: RTCC/3.5.0.0 MediationServer Seeing as there is no RTP traffic whatsoever, I figure the Mediation Server must be objecting to the SDP in the original INVITE. However, at first glance I don't see anything that's off and the MS support newgroups are a bust so I'm wondering if somebody here sees something off in that exchange that could point me towards a solution. Thanks in advance Stephan _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
