>>-When UAC and UAS are not supporting the SESSION-TIMER,then what will be the >>behaviour of call-stateful proxy?
it will behave as if the proxy doesn't support the session timer mechanism. >>-Will call-stateful proxy still sends the SESSION-TIMER header in the INVITE >>that is forwarded to the terminating side with the value configured locally >>and handles the session-timer? A proxy can insert a Session-Expires and/or a Min-SE header but it won't do anything if neither UA supports session-timer. For session-timer, at least one of the UA's has to handle the refreshing. >From RFC4028: Session-Expires header field in the proxied request), this means that the UAS did not support the session timer. If the proxy remembers that the UAC did not support the session timer either, the proxy forwards the response upstream normally. There is no session expiration for this session. So if neither side can do session timer, there is no session expiration. >>-After SESSION-TIMER has expired the session and dialog details will be >>deleted in call-stateful proxy Again, if neither UA supports session timer, then the proxy cannot delete the dialog details as if there was a session timer. A proxy might have it's own inactivity timeout but this is not behaviour described in RFC 4028. >>and BYE will not be triggered to UAC and >>UAS.Now how the UA's are informed about the release of the call? They cannot be informed. But a UA error, application error or user realisation might inform that the call is no longer useful. Regards, Attila -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of venkatesh chandran Sent: 20 April 2007 12:23 To: [email protected] Subject: [Sip-implementors] Regarding SESSION-TIMER Hello All, I have the following queries regarding the SESSION-TIMER handling. -When UAC and UAS are not supporting the SESSION-TIMER,then what will be the behaviour of call-stateful proxy? -Will call-stateful proxy still sends the SESSION-TIMER header in the INVITE that is forwarded to the terminating side with the value configured locally and handles the session-timer? -After SESSION-TIMER has expired the session and dialog details will be deleted in call-stateful proxy and BYE will not be triggered to UAC and UAS.Now how the UA's are informed about the release of the call? Kind Regards, Venkatesh _______________________________________________ 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
