On Tue, 2009-06-23 at 11:55 +0530, Dushyant Dhalia wrote: > I have a basic query regarding offer-answer model. > Why can't/don't UAC & UAS use the same session-id in "o=" line of the > SDP? I agree that RFC 4566 define session-id as > <sess-id> is a numeric string such that the tuple of <username>, > <sess-id>, <nettype>, <addrtype>, and <unicast-address> forms a globally > unique identifier for the session, which makes it different for UAC & > UAS but i want to know what advantage does give it over same session-id > as we have same call-id.
SDP was designed and standardized before SIP -- see RFC 2327/4566. One requirement of SDP is that the identifying tuples must be different if the SDPs are different. Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
