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Re: [Sip] Connected Destination in SIP

Jonathan Rosenberg <jdrosen@cisco.com> Thu, 29 September 2005 14:00 UTC

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Message-ID: <433BF37C.6090208@cisco.com>
Date: Thu, 29 Sep 2005 10:00:28 -0400
From: Jonathan Rosenberg <jdrosen@cisco.com>
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To: Frank Derks <frank.derks@philips.com>
Subject: Re: [Sip] Connected Destination in SIP
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This subject has gotten a fair bit of discussion and remains a somewhat 
controversial one. Some of the recent drafts on it:

http://www.watersprings.org/pub/id/draft-peterson-sipping-retarget-00.txt
http://www.watersprings.org/pub/id/draft-jennings-sipping-connected-00.txt

There remains strong interest in solving this "connected party problem", 
however.

-Jonathan R.

Frank Derks wrote:

> Hi,
> 
> I went through several SIP specifications to find out how the following 
> could be achieved, but thusfar I have not been able to find this is 
> supposed to be done with SIP. Hopefully someone has an idea.
> 
> When an INVITE is retargeted by a SIP proxy, the actual destination 
> changes. The sender of the INVITE, however, remains unaware of this. 
> I.e. the original sender of the INVITE has no clue as to "who" is at
> the other end. E.g. Alice calls Bob, but Bob has instructed the SIP 
> proxy to forward his calls to Carl. Alice ends up being connected to 
> Carl, but SIP does not communicate this. Only when Carl answers the 
> phone, Alice realises that she's not talking to Bob. 
> 
> I have not seen an obvious way to inform Alice about the identity of 
> the actual destination. Does anyone have ideas?
> 
> Cheers,
> 
> Frank
> 
> _______________________________________________
> 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
> 

-- 
Jonathan D. Rosenberg, Ph.D.                   600 Lanidex Plaza
Director, Service Provider VoIP Architecture   Parsippany, NJ 07054-2711
Cisco Systems
jdrosen@cisco.com                              FAX:   (973) 952-5050
http://www.jdrosen.net                         PHONE: (973) 952-5000
http://www.cisco.com

_______________________________________________
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

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