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List:       sip-implementors
Subject:    Re: [Sip-implementors] Number delivery in diversion header
From:       <jan.van.geel () belgacom ! be>
Date:       2009-05-28 9:24:24
Message-ID: 7141C8DE5865094593D2F8DC452B745D0313BA2014 () AE7202 ! BGC ! NET
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Indeed, the HISTORY-INFO header should be used for that and is also able to contain \
the original called number (if I remember well)


Jan Van Geel
IT and Network Development Specialist
Belgacom SDE/SDV/PSE/NST/NCP
Tel: +32 2 202 1035
Tel: +32 2 207 4442
Tel: +32 2 207 9032
Mobile: +32 477 841830
Email : jan.van.geel@belgacom.be
www.cyberwezz.tk

-----Original Message-----
From: sip-implementors-bounces@lists.cs.columbia.edu \
[mailto:sip-implementors-bounces@lists.cs.columbia.edu] On Behalf Of Alejandro \
                Orellana
Sent: 14 May 2009 17:29
To: Lehto, Susan
Cc: sip-implementors@lists.cs.columbia.edu
Subject: Re: [Sip-implementors] Number delivery in diversion header

The original dialed number  is   supposed to be carried in a diversion
header.
for example say :
A calls B
B forwards to C
C sends you an invite

you should received an invite with a diversion like
Diversion: <c@x.x.x.x> reason=unconditional ,;  some other parameters
Diverssion: <b@y.y.y.y>;

also you can get one Diversion header with comma separated  like
Diversion: <b@y.y.y.y> reason=busy; more parameters   , <c@x.x.x.x> ;
reason=unconditional; more paramertes

so the bottom most it is always the original called number and topmost is the dialed \
number (current one).

take a look at  the following draft for details.
draft-levy-sip-diversion-08.txt

Please also notice the diversion header was never moved to an RFC , rather the \
History header it is the "official" . however Diversion it is widely implemented.


--
alejandro


On Thu, May 14, 2009 at 10:43 AM, Lehto, Susan <slehto@bu.edu> wrote:

> To deliver the number originally dialed, is there an area in the SIP
> diversion header to carry the called "telephone number" for delivery
> to a voice mail system?
> 
> Our TDM telephone system is optioned to deliver to the voice mail
> system the number dialed, so that if the called line forwards to voice
> mail,
> 
> 
> 
> 1.  the voice mail system can respond with the called person's
> greeting
> 
> 2.  if the called line forwards to another line, which in turn
> forwards to voice mail, the voice mail system can respond with the
> greeting of the person originally dialed.
> 
> 
> 
> Can SIP achieve the same result?
> 
> We are testing a SIP system, and the vendor does not know of a solution.
> 
> I see that a similar question had been posed on the listserve in
> October 2000, but I have not yet found the answer
> 
> Thanks for applying your expertise to this issue.
> 
> 
> 
> Susan Lehto
> 
> Sr. Analyst
> 
> Boston University
> 
> slehto@bu.edu
> 
> _______________________________________________
> Sip-implementors mailing list
> Sip-implementors@lists.cs.columbia.edu
> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
> 
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