Hi All, I am working on the development of SIP user agent. I have got a problem in SDP negotiation. My problem is as follows.
Suppose user agent A sends an INVITE request to user agent B with SDP as follows v=0 o=A 1907016736 1907016736 IN IP4 151.209.33.171 s=Calling User c=IN IP4 PGS-451 t=0 0 m=audio 2074 RTP/AVP 3 5 a=rtpmap:3 GSM/4000 a=rtpmap:5 GSM/8000 Then user agent B sends OK response along with the following SDP v=0 o=B 1907015736 1907015736 IN IP4 151.209.33.190 s=Answering the call c=IN IP4 pgs-477 t=0 0 m=audio 0 RTP/AVP 3 m=audio 5 RTP/AVP 5 Now since it is understood that user agent B does not support payload of type 3 what should be the response of A. is it user agent A has to send a ACK to the user agent B or send a 3xx response? please give me a clarification. _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
