Iñaki Baz Castillo schrieb: > 2009/2/25 Klaus Darilion <[email protected]>: >> I think if Alice announces G711 and G729, and Bob answers with G.729, >> Alice must send with G729 and Bob can send with G711 too. Is this correct? > > If Bob answers G729 then Alice expects that Bob will send G729.
I wonder why? If I offer somebody to talk to me in English or German, I have to be prepared to receive English or German, even if I started talking in German. Thus from a logical point of view, all the offered codecs should be supported. If the device supports only a single on at the time, it can send reINVITE with a single offer to lock down on a single codec. > But if Bob sends G711, how will detect Alice that the incoming RTP is not > G729? There is the payloadtype field in the RTP header. So it is easy to differ them. klaus > The negoziation is supposed to have place during the SDP exchange and > it must be deterministic, am I wrong? > _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
