[SIPForum-discussion] use of multiple contact

Tomasz Zieleniewski tzieleniewski at gmail.com
Mon Jun 8 08:00:05 UTC 2009


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. This provides a way to use a rendezvous mechanism
in which the devices with the right capabilities are located.
But in case when UAC initiates a request towards UAS this request can
only one SIP URI in the Contact header. Although You can not provide
contact information You can change the contact address during the session
by sending target refresh request like for instance INVITE.

Kind regards,
- Tomasz Zieleniewski

2009/6/6 VG <vikasraigupta at gmail.com>

> 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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