1) According to RFC 3261, why UAS state machine changes state from "Proceeding" to "Terminated" after sending 200 OK? Shouldn't it wait for matching ACK to actually reach "Terminated" state.
2) I have read somewhere that UAS can start sending media after sending 200 OK. Shouldn't UAS always wait for ACK before actually start media ? Best Regards, Manish Jain ----- Original Message ---- From: Markus Hofmann <[EMAIL PROTECTED]> To: "B, Nataraju" <[EMAIL PROTECTED]> Cc: [email protected]; [EMAIL PROTECTED] Sent: Wednesday, October 25, 2006 12:54:08 PM Subject: Re: [Sip-implementors] 3-way handshake 3. And if the UAS never receives an ACK you could be sure that you have a NAT problem. ;) Regards, Markus B, Nataraju wrote: > It serves 2 purposes.... > > 1. to confirm UAS that UAC got the SDP sent in the 200-INV, without ACK > UAS is not sure whether answer reached UAC or not. Before that > confirmation, its like one ended pipe open from UAC to UAS > > 2. to complete the delayed media negotiation > > Thanks, > Nataraju A B > >> -----Original Message----- >> From: [EMAIL PROTECTED] > [mailto:sip-implementors- >> [EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] >> Sent: Monday, September 18, 2006 8:07 PM >> To: [email protected] >> Subject: [Sip-implementors] 3-way handshake >> >> Hi, >> >> What was the intention behind proposing the need for sending ACK after >> 200OK of INVITE under SIP. >> >> >> _______________________________________________ >> 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 _______________________________________________ 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
