________________________________________ From: [email protected] [[email protected]] On Behalf Of Iñaki Baz Castillo [[email protected]]
Hi, is it valid the following (fragment of an) SDP?: m=audio 5970 RTP/AVP 18 0 4 8 96 a=rtpmap:18 G729/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:4 G723/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:96 telephone-event/8000 I know that RFC 2833 or 4733/4734 do not mandate a specific payload value for DTMF, but AFAIK values below 100 are reserved, am I wrong? This is, values below 100 are supposed to indicate standarized values (as some codecs). Please correct me if I'm wrong. _______________________________________________ It is valid to assign a codec to payload 96. IIRC, it is *valid* but not recommended to assign a codec to any payload number, including those that have static assignments. But historically, some Cisco gear only used payload 101 for receiving telephone-event, even if the SDP specified a different payload number. So it has become conventional to always use 101 for telephone-event. Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
