See inline. Regards, Anshuman
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. [ASR] I think the above explanation might be incorrect. Section 13.1 in 3261 states that - "A 2xx response to an INVITE establishes a session, and it also creates a dialog between the UA that issued the INVITE and the UA that generated the 2xx response. Therefore, when multiple 2xx responses are received from different remote UAs (because the INVITE forked), each 2xx establishes a different dialog. All these dialogs are part of the same call." This explanation should also answer the original question. 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. [ASR] I think that it still has to send SDP in 200 OK even if the answer has been sent by a provisional response. Can some 3rd person confirm? Regards, Priya. _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ********************** Legal Disclaimer **************************** "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." ********************************************************************** _______________________________________________ Sip-implementors mailing list Sip-implementors@cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
