On Fri, 2006-01-13 at 12:15 +0200, [EMAIL PROTECTED] wrote:
> I was wondering why the new request should contain the same Call-ID, To
> and

The session refresh request is an INVITE within an existing dialog,
hence it needs to have the same identifiers as the dialog it is part of.

> >From i.e. what will actually happen if the new request will contain
> newly
> generated Call-ID, To and From?

Because it has a different Call-Id, such an INVITE would be considered
part of a different dialog, probably a new dialog, unless by chance the
Call-Id of the refresh INVITE matched some other dialog.  So the INVITE
would appear to be an INVITE outside of an existing dialog.  But in that
case, the recipient would notice that the INVITE has a to-tag, which an
INVITE outside of a dialog cannot have.  So the request would likely be
either rejected as erroneous or would be treated as starting a new
dialog.

Dale


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