As I know, according to RFC4733 section 2.5.1.1: If the sender receives an "events" parameter from the receiver, it MUST restrict the set of events it sends to those listed in the received "events" parameter.
Both UAC and UAS must use telephone-event for DTMF, your case is invalid. 2018-03-02 5:00 GMT+07:00 F Yuan <fuliangy...@gmail.com>: > Hi All, > > I have a case that both offer and answer SDPs support the same > telephone(DTMF) event with G711 codec, is it possible that called party > (answer SDP) uses only encoded G711 audio packet for DTMF instead of using > DTMF event although called party included the same DTMF event in answer > SDP? > > Are there recommendations defined in RFCs for this case? > > Thanks > > Frank > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
