Sorry, slight mistake: the second UAS would send the 487 to the CANCELed INVITE, so the proxy need not do this

----- Original Message ----- From: "Markus Hofmann" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Wednesday, May 04, 2005 11:08 AM
Subject: [Sip-implementors] <no subject>



Hello everbody,

I have a question about the following phrases (15 Terminating a session, RFC 3261):

"The caller's UA MAY send a BYE for either confirmed or early dialogs, and the callee's UA MAY send a BYE on confirmed dialogs, but MUST NOT send a BYE on early dialogs."

Do I understand it right, that it is allowed to send a BYE for an early dialog from the UAC side?

Imagine following scenario:

UAS sends an INVITE to a proxy. The proxy forks the INVITE and two provisional response with different to tags are coming back. One UAS sends a 200 OK and the proxy cancels successfuly the INVITE request to the other UAS.

The UAC has now a confirmed dialog and an early dialog. MAY the UAC send a BYE the the successful canceled UAS? When can the UAC clean up the early dialog?

Thank you in advance.

Markus
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