Flow 2 is correct. The Cancel is not needed as the INVITE transaction is already finished.
klaus On Thu, July 27, 2006 1:00, Sumeet Gupta said: > Hello, > > I am having an issue regarding a particular call flow through OpenSER. I > was > hoping someone could clarify. Basically this vendor claims that it is > incorrect to send a CANCEL in response to a negative INVITE even after it > has recieved a provisional response like a 183. > > Call from Party A to Party B > > Call flow 1: > (A) INVITE > (B) 100 > (B) 183 > (B) 503 > (A) ACK > (A) CANCEL > > > Vendor claims it should be like this with no CANCEL. > Call Flow 2: > (A) INVITE > (B) 100 > (B) 183 > (B) 503 > (A) ACK > > Which flow is correct? > > Thanks, > Sumeet > > _________________________________________________________________ > On the road to retirement? Check out MSN Life Events for advice on how to > get there! http://lifeevents.msn.com/category.aspx?cid=Retirement > > > _______________________________________________ > Devel mailing list > Devel@openser.org > http://openser.org/cgi-bin/mailman/listinfo/devel > _______________________________________________ Devel mailing list Devel@openser.org http://openser.org/cgi-bin/mailman/listinfo/devel
