Andy, It is allowed, but since reINVITEs often don't involve user interaction (and hence typically give a final response quickly, no "ringing.....") it is not recommended. You would almost always be too late, it's better to wait for the reINVITE response
Regards, Jeroen ----- Original Message ----- From: "Sweeney, Andrew (Andrew)" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, May 19, 2006 2:15 PM Subject: [Sip-implementors] Cancelling a Re-Invite?? > > Is it valid to cancel a re-invite as in the call flow shown below? > > I have never seen it. I though Cancels were only sent before a dialog was > established. > > Thanks > Andy > > LOCAL-SIP REMOTE-SIP > INVITE > ---------------------> > 180 > <--------------------- > 200 > <--------------------- > ACK > ----------------------> > (re)INVITE > <--------------------- > some error response > ----------------------> > CANCEL > <--------------------- > 200 > ---------------------> > 487 > ---------------------> > ACK > <-------------------- > BYE > <-------------------- > > _______________________________________________ > Sip-implementors mailing list > [email protected] > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
