[SIPForum-discussion] Query regarding Voicemail-Subscription

[Niraj Rathod]

Yup. Same here. Don't need explicit subscribe. You can refer to NICC ND1033
spec if your implementation is for NGA.

Thanks
Niraj
On 29 Sep 2014 19:22, "Aniella Juverdeanu" <Aniella.Juverdeanu at telus.com>
wrote:

> Yes - with VM it can be implicit subscribe to avoid lots of messages - we
> use it in our network - some vendors set this implicit subscribe - worked
> well for the last few years now.
>
> Thx
> Aniella
>
> -----Original Message-----
> From: discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] On Behalf Of Paul Kyzivat
> Sent: September 27, 2014 10:31 AM
> To: discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] Query regarding Voicemail-Subscription
>
> On 9/23/14 8:08 AM, Durgesh kumar singh wrote:
> > Hello
> >
> > I have one query related to our SIP project.
> >
> > *Is it possible to receive voicemil Notify without sending any
> > subscribe to SIP server ?*
> >
> > Actually in our case we are using Intraswitch SIP server to register
> > our client which support the Voicemail.
> >
> > So when our client register then without sending any SUBSCRIBE packet
> > we receiving the NOTIFY from server which indicate our Voicemail counter.
>
> This is incorrect according to all published IETF specs I am aware of.
> But I know it occurs in the wild. What software is generating it?
>
>         Thanks,
>         Paul
>
> > Till now what i know that, for any type of Notification, SIP client
> > first need to send subscribe (For Voicemail) to SIP server and then we
> > receive Notify from SIP server whose SIP flow is below mentioned.
> >
> >
> > SIP Client  |-----SUBSCRIBE---->| SIP Server SIP Client
> > |<-------200--------| SIP Server SIP Client  |<------NOTIFY----- | SIP
> > Server SIP Client  |--------200------->| SIP Server
> >
> >
> > So please help me to figure out this query that for any Notify,
> > Subscribe is necessary or it's depend on server configuration.
> >
> >
> > Thanks,
> > Durgesh K singh
> >
> >
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>
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