Strange early media SDP behavior
Late negotiation is on, bypass_media=true. Leg B receives the following SDP in SIP 183 message: v=0 o=root 4913 4913 IN IP4 64.21.13.41 s=session c=IN IP4 64.21.13.41 t=0 0 m=audio 37650 RTP/AVP 0 8 18 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv 3 codecs in SDP offer. Freeswitch send to leg A SIP 183 with the following SDP: v=0 o=root 4913 4913 IN IP4 64.21.13.41 s=session c=IN IP4 64.21.13.41 t=0 0 m=audio 37650 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 1 codec only. Why 2 other codecs are removed from SDP? Tested on today's git, older versions have the same behavior. Is it expected behavior or a bug?
Any feedback from FS developers? On Saturday 14 August 2010, Sergey Okhapkin wrote:
Late negotiation is on, bypass_media=true. Leg B receives the following SDP in SIP 183 message:
v=0 o=root 4913 4913 IN IP4 64.21.13.41 s=session c=IN IP4 64.21.13.41 t=0 0 m=audio 37650 RTP/AVP 0 8 18 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20 a=sendrecv
3 codecs in SDP offer. Freeswitch send to leg A SIP 183 with the following SDP:
v=0 o=root 4913 4913 IN IP4 64.21.13.41 s=session c=IN IP4 64.21.13.41 t=0 0 m=audio 37650 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - a=ptime:20
1 codec only. Why 2 other codecs are removed from SDP? Tested on today's git, older versions have the same behavior. Is it expected behavior or a bug?
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No ringbacks, it's bypass_media mode. On Monday 16 August 2010, Brian West wrote:
I suspect you have FreeSWITCH generating ringback..... because we NEVER answer with a 200 OK with more then one codec.
/b
On Aug 15, 2010, at 7:00 PM, Sergey Okhapkin wrote:
Any feedback from FS developers?
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participants (2)
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Brian West
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Sergey Okhapkin