From: junpark <[EMAIL PROTECTED]> In the following call flows which transport layer protocol should be chosen? My guess is that UA1 should send out PRACK message by UDP because the contact header of "180 Ringing" indicates transport=udp (no transport header means use of UDP)
You are correct that the Contact header of the 180 Ringing is the address to be used for the remote end of the dialog. But since the URI provides no transport specification, the transport to be used is determined by RFC 3263 (as Brett explains), possibly modified by local policy. Dale _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
