Comment inline Regards Ajit
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of priya pandit Sent: Friday, December 23, 2005 10:59 AM To: [email protected] Subject: [Sip-implementors] Multiple 2xx responses Section 13.1 of RFC 3261 says: "After possibly receiving one or more provisional responses, the UAC will get one or more 2xx responses or one non-2xx final response." My questions are: 1. What is the use of receiving multiple 2xx responses and why does it happen? -> Multiple 2xx response can be received in two case-- a) As the request has been forked and is being responded by multiple UAS. b) Due to the response retransmission done by the UAS. This is done as the UAS has not yet received the ACK and the transport used is unreliable. 2. Though an ACK is sent back to all, which one should be considered finally ? -> their will be only one ACK response from UAC that will the server transaction to transition itself from completed to confirmed state, rest of all ACK's will be absorbed by UAS having no effect of server transaction state. 3.Can all of them contain SDPs (pbly answer SDPs)? -> each of the 200Ok response can or need not have the SDP, if one retransmission has SDP answer than all will have. Remember answer can also be sent in 1xx provisional response like 180 ringing. Regards, Priya. _______________________________________________ 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
