> -----Original Message----- > From: Fred Peyrard [mailto:[EMAIL PROTECTED]] > Sent: Monday, May 14, 2001 8:02 AM > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: Obj:[Sip-implementors] Doubt in sending Cancel, > > > Philip, > > I appreciated the precise answer you made in: > http://lists.cs.columbia.edu/pipermail/sip-implementors/2001-M > arch/000616.html > > But, the points that you mentioned are not currently in rfc2543bis... > Is it mentioned somewhere else or is it planned to be added > in the next release of rfc2543bis? Well, here was the question and the response: >No , the UAS will not send CANCEL/BYE when he wants to reject the request, >but he rejects it with 3xx/4xx/5xx/6xx responses based on whether he wants to >redirect or indicate some type of error. > >CANCEL will be sent only by the side which sent the request. Also BYE makes >sense only if a call is setup. > >rgds >philip > -->-----Original Message----- -->From: Vijeth D [mailto:[EMAIL PROTECTED]] -->Sent: Tuesday, March 06, 2001 3:33 PM -->To: [EMAIL PROTECTED] -->Subject: [Sip-implementors] Doubt in sending Cancel --> --> -->Hi, --> When a UAS receives a request, can it send a CANCEL or BYE -->to reject the request instead of 603 or 4xx response. --> -->regards, --> Vijeth Bis-03 says, in section 15.2: When the initial INVITE request is received at the callee, the callee can accept,redirect, or reject the call. In all of these cases, it formulates a response. I think thats fairly clear. Section 15.1 says: If the UAC desires to end the call before a response is received to the INVITE,itSHOULD send a CANCEL.ThisCANCEL will normally result in a 487 response to be returned to the INVITE, indicating successful cancellation. However, it is possible that the CANCEL and a 200 class response to the INVITE "pass on the wire". In this case, the UAC will receive a 2xx to the INVITE. It then terminates the call by following the procedures described in Section 15.4. WHich now, finally, clearly indicates when to send CANCEL to end a call. 15.4 talks about when to send BYE. So, I believe bis-03 provides the information in the answer provided by Philip. -Jonathan R. --- Jonathan D. Rosenberg, Ph.D. 72 Eagle Rock Ave. Chief Scientist First Floor dynamicsoft East Hanover, NJ 07936 [EMAIL PROTECTED] FAX: (973) 952-5050 http://www.jdrosen.net PHONE: (973) 952-5000 http://www.dynamicsoft.com _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
