Imagine an INVITE with an SDP that looks roughly like this that is received by a UA:
v=0 m=audio 10000 AVP/RTP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-11 If that UA can send, but not receive telephone-event, what is the answer SDP then supposed to look like? More exactly what would the SDP answer below indicate? v=0 m=audio 20000 AVP/RTP 0 a=rtpmap:0 PCMU/8000 Of course it means that both sides will use PCMU for both send and receive with PT=0. The question is if the UA that sent the answer if allowed to send telephone-event's with PT=101? Should the UA that sent the offer always be prepared to receive with all the codecs it announced or should it "cease to listen" to codecs that wasn't mentioned in the SDP answer? / Christian Jansson _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
