Dear All, I need the help from in one of my sip call scenario. Call flow is as below.
UA -> 187.28.162.5 -> SBC Realm 1 (200.182.99.75) -> Machine SIP Realm 1 (187.60.58.133) -> SBC Realm 2 (187.60.52.80) -> Termination Provider Realm 1 (200.216.239.196). However the problem i am seeing rightnow is that whenever my SBC is sending the call from from *second last entity to Termination Provider REALM1 then the termination provider realm is not replying to the INITIAL invite at all. * Although i checked the content type value in message body and seeing something odd, not sure if this is the valid headers or not as below. UA--->to SBC(And in this SBC recieved the INVITE from UAC and forwarded to next hope(Which means SBC Ingress realm and it sends the 100 Trying) ===== Content-Length: 455 Content-Type: multipart/mixed;boundary=ssboundary --ssboundary Content-Length: 249 Content-Type: application/sdp ===== Also SDP ====== m=audio 17774 RTP/AVP 18 8 4 2 a=rtpmap:18 G729/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:4 G723/8000 a=rtpmap:2 G726-32/8000 a=fmtp:18 annexb=yes --ssboundary Content-Length: 30 Content-Type: application/isup;version=itu-t92+ ..h. .. ......%..... ....#v.C. --ssboundary-- ===== *Now from here the situation got worst where Termination Realm is not replying to MSX at all, where also i can see another VIA header is added by MSX(could by due to proxy)* ====== INVITE sip:[email protected];user=phone SIP/2.0 Max-Forwards: 66 Session-Expires: 3600;refresher=uac Min-SE: 600 Supported: timer, 100rel To: <sip:[email protected]:5060;user=phone> From: <sip:[email protected]>;tag=3544361906-29701 Call-ID: [email protected] CSeq: 1 INVITE Allow: INVITE, BYE, OPTIONS, CANCEL, ACK, REGISTER, NOTIFY, INFO, REFER, SUBSCRIBE, PRACK, UPDATE, MESSAGE, PUBLISH Record-Route: <sip:187.60.58.133> Via: SIP/2.0/UDP 187.60.58.133:5060;branch=z9hG4bK60c2d2733c5e07c55fee0d1 Via: SIP/2.0/UDP 200.182.99.75:5060 ;branch=z9hG4bK9d9c30880484a3108ccd4d447b928f24 Contact: <sip:[email protected]:5060> Call-Info: <sip:200.182.99.75>;method="NOTIFY;Event=telephone-event;Duration=1000" Content-Type: multipart/mixed;boundary=1140858378-1335373106-29811 Content-Length: 459 --1140858378-1335373106-29811 Content-Type: application/SDP v=0 o=RISNEXT01 24425908 24425908 IN IP4 200.182.99.75 s=sip call c=IN IP4 200.182.99.92 t=0 0 m=audio 47666 RTP/AVP 18 8 4 2 a=rtpmap:18 G729/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:4 G723/8000 a=rtpmap:2 G726-32/8000 a=fmtp:18 annexb=yes --1140858378-1335373106-29811 Content-Type: application/ISUP;version=itu-t92+ ====== Could anyone please check and help me to investigate the issue. For the reference i also attached both legs of ethereal traces. Thanks, Nitin
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