Things are clear now, thanks Brett.

Cheers,
Aman

On Mon, Aug 10, 2015 at 3:24 PM, Brett Tate <br...@broadsoft.com> wrote:

> > So UAC should send the PRACK to each 183 received
> > (with new 'To Tag') from P2?
>
> From an RFC perspective, the UAC must support INVITE forking interactions
> (i.e. potential for multiple early/confirmed dialogs).  However as
> discussed
> within draft-jesske-dispatch-forking-answer-correlation-03, not every UAC
> is
> compliant.
>
>
> > Is this the desired behavior as per the RFC?
>
> Yes; support for forking is not optional within RFC 3261.
>
> Similarly, RFC 3262 section 4 indicates the following.
>
> "The provisional response MUST establish a dialog if one is not yet
> created.
>
> Assuming the response is to be transmitted reliably, the UAC MUST
> create a new request with method PRACK.  This request is sent within
> the dialog associated with the provisional response (indeed, the
> provisional response may have created the dialog)."
>
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