[SIPForum-discussion] use of multiple contact

[Tomasz Zieleniewski]

Hi,

As I mentioned in my previous answer, forking is possible because
in SIP there can be multiple registrations corresponding to the same AOR.
This means that particular SIP URI can be reachable under multiple
physical destinations. Each such registration can be performed by one or
more
REGISTER message exchanges with registrar. Both REGISTER request and
as well as the response can contain more then one address bindings in the
Contact header.
But the meaning of the Contact header in REGISTER request and
it response is completely different then those in other requests.
Similarly with 3xx responses sent by redirect server.

Kind regards,
- Tomasz Zieleniewski

2009/6/8 prakash k <prakash_12305 at yahoo.co.in>

> Hi Abishek,
>
> I have one doubt if there is no concept of  multiple contact in SIP then
> how come this forking concept will be there?
> Also there is possibility of multiple contact in responses sent by
> redirection server.
>
> Regards
> Prakash k
>
>
> ------------------------------
> *From:* "abhishek.chattopadhyay at wipro.com" <abhishek.chattopadhyay at contact
> wipro.com>
> *To:* vikasraigupta at gmail.com; discussion at sipforum.org
> *Sent:* Monday, 8 June, 2009 1:17:35 PM
> *Subject:* Re: [SIPForum-discussion] use of multiple contact
>
> Contact should be only one according to RFC3261.
> BTW what might be the use of more than one ?
> Moreover sip dialogs are peer to peer relationships.
>
>
>
> Regards
> ABHISHEK
>
>
> -----Original Message-----
> From: discussion-bounces at sipforum.org
> [mailto:discussion-bounces at sipforum.org] On Behalf Of VG
> Sent: Saturday, June 06, 2009 10:57 AM
> To: discussion at sipforum.org
> Subject: [SIPForum-discussion] use of multiple contact
>
> hi,
>
> In sip is their any mechanism to provide multiple contact information.
>
> Also if UAS wants to keep only first contact then what message will it
> shoot to UAC.
>
> Regards,
> VG
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