It's standard SDP offer/answer. Fresswitch will not send three audio streams with three codecs. You're advertising three codecs with PCMU first. Freeswitch supports PCMU in your configuration and agrees on that codec. There are several configuration options in freeswitch and the phone that can influence this behavior. -- Kristian Kielhofner http://blog.krisk.org ----- Original Message ----- From: freeswitch-users-bounces@lists.freeswitch.org <freeswitch-users-bounces@lists.freeswitch.org> To: FreeSWITCH Users Help <freeswitch-users@lists.freeswitch.org> Sent: Sat Aug 14 11:19:07 2010 Subject: [Freeswitch-users] 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? _______________________________________________ FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org