VP530 and incorrect answer on initial INVITE with t.38 - Printable Version +- Yealink Forums (http://forum.yealink.com/forum) +-- Forum: Video Collaboration (/forumdisplay.php?fid=5) +--- Forum: VP530 (/forumdisplay.php?fid=25) +--- Thread: VP530 and incorrect answer on initial INVITE with t.38 (/showthread.php?tid=2122) |
VP530 and incorrect answer on initial INVITE with t.38 - lx2006 - 07-23-2014 06:02 PM Dear support, Callee(22222) - Yealink VP530 Firmware Version 23.70.0.40 Hardware Version 23.5.1.201.18.0.8 Caller(11111) - Softphone Kapanga with enabled audio,video,t38 (t.38 in initial INVITE) 1. Caller makes call to callee 2. After answering call drops Initial INVITE SDP from caller INVITE sip:11111@192.168.1.10 SIP/2.0 .... v=0 o=22222 1406098068 1406098115 IN IP4 192.168.1.132 s=Kapanga [1406098068] c=IN IP4 192.168.1.132 t=0 0 m=audio 5106 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=sendrecv a=rtcp:5107 a=maxptime:20 a=ptime:20 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 m=video 5108 RTP/AVP 34 a=rtpmap:34 H263/90000 a=fmtp:34 QCIF=2 a=sendrecv a=rtcp:5109 m=image 5106 udptl t38 a=T38FaxVersion:0 a=T38MaxBitRate:14400 a=T38FaxFillBitRemoval:0 a=T38FaxTranscodingMMR:0 a=T38FaxTranscodingJBIG:0 a=T38FaxMaxBuffer:200 a=T38FaxMaxDatagram:72 a=T38FaxUdpEC:t38UDPRedundancy a=T38FaxRateManagement:transferredTCF SDP: After Answered by callee SIP/2.0 200 OK ... v=0 o=- 20021 20021 IN IP4 192.168.1.160 s=SDP data c=IN IP4 192.168.1.160 t=0 0 m=audio 11790 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=sendrecv a=fmtp:101 0-15 a=rtpmap:101 telephone-event/8000 m=video 11792 RTP/AVP 34 a=rtpmap:34 H263/90000 a=fmtp:34 QCIF=2 a=sendrecv m=image 11790 udptl 0 a=rtpmap:0 PCMU/8000 Why VP530 answers in sdp image section with audio codec? This device doesn't support Fax RE: VP530 and incorrect answer on initial INVITE with t.38 - Bryan Nelson - 07-31-2014 07:32 AM Looks like a default behavior in the sip stack that was not removed. I take it this is giving you trouble, since the Caller then assumes it is a fax call? Though this phone doesn't support fax like you said, so why the fax invites? |