Hi Re-INVITE and UPDATE can be used to modify session parameters
A Re-INVTE can be sent only after establishing a session Where as UPDATE can be sent in early dialog -Regards Ramya -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Iñaki Baz Castillo Sent: Thursday, May 15, 2008 1:20 PM To: [email protected] Subject: Re: [Sip-implementors] Reg. SIP reinvite, UPDATE and OPTIONS El Thursday 15 May 2008 08:59:00 Robins George escribió: > AFAIK > > the sip re-invite is used to make session alive. > and re-invite is send by UAC/UAS(based on who sets the session refresh > timer) when session refresh timer fires, > which will happen before a session expires. > > the UPDATE method is used to update the session > parameters(port,media type etc) of the existing session. > > and OPTIONS is used to find out the capabilities(accept-encoding, > content type etc) of the UA. this method can be send inside/outside the > dialogue. Also in-dialog OPTIONS is used to verify the state of an existing dialog since the UAS is supposed to answer "200 OK" in case a dialog with that "To" tag exists. -- Iñaki Baz Castillo [EMAIL PROTECTED] _______________________________________________ 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
