> It is a concern: > 1. 3-step transaction (if we logically > attribute ACK to the INVITE transaction) > brings more complexity in processing of good > flows as well as bed ones, compared to 2-step. > 2. SDP update involves updating media session > (theoretically they may change), and an > implementation may have dependencies if media > stream changes (like ongoing voice recording, > mixing/conferencing, supervising, etc), > processing of which may add up complexity.
If UPDATE is supported, UPDATE without SDP solves both of your concerns. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
