Correct -- if the party receiving the G.722 packets did not advertise support for the G.722 payload type in its SDP stanza, it should just ignore them if they arrive anyway.
On Thu, Nov 15, 2018 at 06:21:14AM +0000, Sundbaum Per-Johan (Telenor Sverige AB) wrote: > I should have given more details, in the example I gave there was actual a > couple of G.722 packets that was marked with payload type G.722 received in a > session where G.711A(PCMA/8000) was established as the agreed codec, the > receiving PBX did not have support for G.722. > As I interpret RFC 3550 the PBX should drop the G.722 packets and let the > session continue, and same applies also in case where G.722 is supported by > PBX, am I wrong ? > BR/pj > > -----Original Message----- > From: sip-implementors-boun...@lists.cs.columbia.edu > [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Dale R. > Worley > Sent: den 15 november 2018 05:10 > To: Paul Heitkemper > Cc: sip-implementors@lists.cs.columbia.edu > Subject: Re: [Sip-implementors] RTP with wrong payload > > Paul Heitkemper <pheitkem...@iedaudio.com> writes: > > RFC 3550 Section 5.1 > > > > " A receiver MUST ignore packets with payload types that it does not > > understand." > > Though this rule is based on the payload type code, and not the encoding. > The original post says only that the packets contain G.722 data, but if that > data is marked with the payload type code that was negotiated for G.711A, the > recipient will try to decode it as G.711A. > Perhaps the recipient can determine that the data is invalid (as G.711A) and > discard it, but more likely it will decode it into some sort of noise which > it will present to the user. > > Dale > _______________________________________________ > 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 -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
