The usual way is that the address of the Voice Mail Server has to be
configured in the user's phone. The user phone needs to send SUBSCRIBE
for message-summary event and the Voice Mail Server will NOTIFY the
user if there is a change in his mailbox.

The presence engine is responsible for collecting and distributing
"presence" information: event "presence". I don't understand why you
want to use presence engine to collect and distribute MWI. Unless, you
have some framework like Presence Engine that work for message-summary
event too.

On 9/3/07, Sai P. Varanasi <[EMAIL PROTECTED]> wrote:
> Hi All,
>
>   Is there a standard for a third party voicemail subsystem to notify the
> presence server that a user has a new message? How does the presence server
> notify a particular user about MWI on a voicemail engine?
>
> Thanks & Regards,
> Sai Prabhakar Varanasi
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Vikram
> Chhibber
> Sent: Monday, September 03, 2007 12:54 PM
> To: Goyal, Amit
> Cc: [email protected]
> Subject: Re: [Sip-implementors] Route Header in INVITE.
>
> I guess the second option as the PCSCF has the capability to Route the
> invite to ICSCF of the calling party domain or directly to the SCSCF
> if it has the registration cache.
>
> On 9/3/07, Goyal, Amit <[EMAIL PROTECTED]> wrote:
> > Hi,
> >
> >
> >
> > In IMS environment if we get 200 OK for REGISTER without Service-Route,
> > Then what should be the Route set for out going INVITE ?
> >
> >
> >
> > 1.      No Route
> >
> >              OR
> >
> >      2 Route with only P-CSCF Address
> >
> >
> >
> > Or something else.
> >
> >
> >
> > Regards,
> >
> > Amit
> >
> > _______________________________________________
> > Sip-implementors mailing list
> > [email protected]
> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
> >
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