Hi all, New to this list. Apologies if this question has been asked many times before (my searches showed that it has, but i was still unable to find a definitive answer). The question is about SDP telephone-event (DTMF) payload negotiation. Imagine the following call setup between A and B: INVITE A->B SDP: (among other media formats) a=sendrecv a=rtpmap:101 telephone-event/8000 200 OK B->A SDP: (among other media formats) a=sendrecv a=rtpmap:97 telephone-event/8000 The question is: Is the above legal? I.e. is B allowed to choose a different PT than proposed y A. In case yes, what PT should the telephone-events be sent... from A to B? from B to A? Please corroborate your answers by providing normative references if possible. I studied RFC 3264 (SDP Offer/Answer Model) intensively, but could not conclude for a definitive answer in that particular case.
Regards, Lars Ruoff _______________________________________________ Sip mailing list https://www.ietf.org/mailman/listinfo/sip This list is essentially closed and only used for finishing old business. Use [email protected] for questions on how to develop a SIP implementation. Use [email protected] for new developments on the application of sip. Use [email protected] for issues related to maintenance of the core SIP specifications.
