Hi,
Early bis drafts support CANCEL for any request.
How UAS (bis 09) should respond to CANCEL for none-INVITE request from UAC (early bis) ?
Thanks,
Amihay Fuxbruner
System Engineering - Signaling R&D
Comverse
-----Original Message-----
From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@lmf.ericsson.se]
Sent: Tuesday, March 19, 2002 4:43 PM
To: Fuxbruner, Amihay
Cc: sip@ietf.org
Subject: Re: [Sip] Question on UPDATE after INVITE completion
Hello,
"Fuxbruner, Amihay" wrote:
>
> What is the purpose of sending UPDATE after INVITE completion ?
> Is this another way for re-INVITE ?
UPDATE involves only two messages, so it can be useful for saving
bandwidth. re-INVITE is still needed, though, because in some scenarios
you cannot provide an offer in the re-INVITE, and you have to wait for
an offer in the response. UPDATe does not support this
three-way-handshake.
Regards,
Gonzalo