On Thu, 2008-12-04 at 14:28 -0500, Dan Mongrain wrote: > I have a SIP UA that sends an INVITE to the proxy. The proxy responds > with the 100 Trying but this message [the 100] fails to get to the SIP [UAC] > so it > retransmits the INVITE. Should the proxy re-send a 100 Trying? I see > that the SIP UA did not increment the Cseq header in the retransmit, > should it have? I find RFC 3261 a bit nebulous on this point.
If the proxy receives a duplicate INVITE (via UDP), it should resend the 100, as the proxy has no way to know that the UAC received the first 100. Retransmits have the same CSeq because they are "the same message". Dale _______________________________________________ sipx-dev mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-dev Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-dev
