[EMAIL PROTECTED] wrote:
>
> Thanks Sanjay, Paul
> now in this scenario (in early dialog) can UAS initiates the same
> requests(OPTIONS or INFO) towards UAC?
> I mean after responding with 18X response and before responding 2XX
> response can UAS initiates an OPTIONS or INFO requests..?
I thought I already covered that. If the UAS has received something from
the UAC indicating that it knows there is an early dialog then the UAS
can safely send something within the dialog. If the UAS has sent a
provisional with a to-tag but has not yet received any indication that
the UAC has received that, sending something within the dialog is
chancy. If for some reason the provisional was lost then the request
within the dialog will fail.
Paul
> Regards,
> --Tanmay
>
>
> *Paul Kyzivat <[EMAIL PROTECTED]>*
>
> 03/22/2007 02:23 PM
>
>
> To
> "Sanjay Sinha (sanjsinh)" <[EMAIL PROTECTED]>
> cc
> Tanmay Paul/BLR/[EMAIL PROTECTED], [email protected]
> Subject
> Re: [Sip-implementors] One Doubt about OPTIONS and INFO
>
>
>
>
>
>
>
>
>
>
> Sanjay Sinha (sanjsinh) wrote:
> > It can, if early dialog is established. Early dialog is considered
> > established if 18X with to-tag is sent reliably.
>
> An unreliable provisional with to-tag is sufficient to establish the
> early dialog. Certainly if the UAC receives such a provisional then both
> it and the UAS are aware of the dialog so its ok for it to send an
> OPTIONS or INFO within the dialog. If the UAS has sent the unreliable
> provisional then it cannot be certain that it has been received. It can
> still send an OPTIONS or INFO and hope that the provisional was received
> to establish the early dialog, but it runs the risk of the OPTIONS or
> INFO failing if the provisional was lost.
>
> Paul
>
> >> -----Original Message-----
> >> From: [EMAIL PROTECTED]
> >> [mailto:[EMAIL PROTECTED] On Behalf Of
> >> [EMAIL PROTECTED]
> >> Sent: Wednesday, March 21, 2007 11:21 AM
> >> To: [email protected]
> >> Subject: [Sip-implementors] One Doubt about OPTIONS and INFO
> >>
> >> Hi All,
> >> I have one doubt about OPTIONS and INFO requests.
> >> Consider the scenario where UAC is going to initiate a dialog
> >> by sending INVITE and UAS has responded with 1XX response.
> >> Now before receiving final response (2XX), can UAC initiate a
> >> OPTIONS or INFO request towards UAS?
> >> To be precise is it allowed to initiate a INFO or OPTIONS
> >> request in a early dialog. Please put some comments on it.
> >> Thank you.
> >>
> >> Regards,
> >> --Tanmay
> >>
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