I think I have missed something here. Why do we need to maintain codec numbers relationship with the previous offer/answer (Between Alice and Bob)? My understanding is that offer/answer model does not have any state dependency with previous one except for "o" line and maintaining media description ordering.
I will say preserving m line ordering is definitely the reason. Codec number for dynamic payload can change within same session. On Tue, Sep 23, 2008 at 1:12 AM, <[EMAIL PROTECTED]> wrote: > From: "Vikram Chhibber" <[EMAIL PROTECTED]> > > In the call flow that the draft describes, isn't it better to send > re-INVITE > without SDP towards the music-store? The reason is that "Alice" UA may > send > back codecs previously negotiated with "Bob" whose intersection with > media-source may be 0. > > If the first INVITE (F5) is sent to Music Source, then Music Source > can choose codec numbers without any relationship to the codec numbers > that have been used in the dialog between Alice and Bob, which makes > it impossible to use the SDP offer returned by Music Source as an > offer to Alice. > > Dale > _______________________________________________ > Sip-implementors mailing list > Sip-implementors@lists.cs.columbia.edu > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
