RE: [Sip] Extension mobility in SIP

Hi, 

The Extension Mobility feature dynamically configures a phone according
to the current user. Once a user logs in, the phone adopts
the user individual user default device profile information, including
line numbers, speed dials, services links, and other user-specific
properties of a phone.

For example, when user A occupies a desk and logs in to the phone, her
directory number(s), services, speed dials, and other properties appear
on that phone; but when user B uses the same desk at a different time,
his information appears.

Hope this is clear. How is this achieved in SIP ?

Thanks & Regards,
Anisha

-----Original Message-----
From: James M. Polk [mailto:jmpolk@cisco.com] 
Sent: Thursday, January 31, 2008 11:58 AM
To: Dean Willis; Anisha Kumar
Cc: sip@ietf.org
Subject: Re: [Sip] Extension mobility in SIP

At 11:28 PM 1/30/2008, Dean Willis wrote:

>On Jan 30, 2008, at 10:30 PM, Anisha Kumar wrote:
>
>>Hi ,
>>
>>  Is there a separate RFC for the implementation of extension mobility

>>in SIP Uas ? If not, is it possible to achieve that ?
>What do you mean "extension mobility"? Are you thinking of the use case

>where a SIP user agent is moving around and occasionally changes its IP

>address and point of attachment to the Internet? Do you expect call 
>continuity in such a case, quick recovery of the call afterward, or 
>call drop?

A lot of times, 'extension mobility' means the number to call a phone
(UA) changes based on who logged (or registered) onto it -- which is
very different that what is above.

>--
>Dean
>
>
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_______________________________________________
Sip mailing list  https://www1.ietf.org/mailman/listinfo/sip
This list is for NEW development of the core SIP Protocol
Use sip-implementors@cs.columbia.edu for questions on current sip
Use sipping@ietf.org for new developments on the application of sip