On Wed, 2008-12-10 at 13:32 +0530, Nabam Serbang wrote: > 1) If the offer being presented in 2xx (200 OK) for INVITE is not acceptable > by UAC, what would be the valid answer in that ACK? Remember this not > re-INVITE which will have prior SDP.
No doubt you can take the SDP in the 200, modify in slightly in a few places, and convert it into an SDP answer that is value *with respect to the SDP offer*. Of course, since you are going to terminate the dialog immediately, it does not matter if the SDP answer has any relationship to the capabilities of the UA itself. > 2) if same offer is not acceptable by UAC, it means there is no media > streams. Why send valid answer in ACK when offer is not acceptable ? So that every SDP offer receives an SDP answer (except when the offer is in a request and the request receives a failure response). > Again > sending BYE immediately means terminating the session? If you are sure to > terminate the session soon, why to send answer in ACK? Shouldn't UAS > consider that ACK has never been received and UAS send BYE rather than UAC? If the UAC does not receive an ACK, it must resend the 200 until it receives an ACK. The fact that one or both UAs has sent a BYE for the dialog does not change that rule. Dale _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
