While there is real case that the UAC receives different SDP in 1XX and 200 OK, and should not ignore the SDP in 200 OK. Following is the case I met.
A, B, C are sip UE. B owns sequential ring service(to C). A calls to B, B rings but not to answer B, timer expires, and C rings, C off hook. A talking to C. In the above case, when Invite request reach to B, B may response with 183(SDP) firstly to connect A to a media server to hear announcement. While the first call attempt will be cancelled, and when C off hook, A will got a 200 OK (SDP) related to C. thanks, Nathan _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
