Hi all, I was exploring the possibility for the UPDATE to send the Answer, As I haven't found any explicit restriction in RFC 3311. I went through the older Thread http://lists.cs.columbia.edu/pipermail/sip-implementors/2004-January/006017. html <http://lists.cs.columbia.edu/pipermail/sip-implementors/2004-January/006017 .html> and came across following Qs which I found not clarified though. 1. Can UPDATE be used to send an answer SDP ? Consider the following scenario: - INVITE was sent without SDP - 18x is received with Offer SDP - There is no PRACK exchange because 18x does not contain a Require:100rel header Now can UPDATE be used to send answer SDP?? 2. As per RFC 3311, UPDATE method should be used only if dialog is established. If INVITE/18x exchange happened without PRACK, can both ends treat this as early dialog and feel free to use UPDATE ? 3. Is 18x send/recv over TCP considered reliable ? In the following scenario: - INVITE with offer sdp sent - 18x over TCP with answer sdp recvd (No PRACK exchange happened) Now can the caller/calleee use UPDATE ?
Can any body clarify the same? Thanks in advance, Bhavik Chauhan _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
