[SIPForum-discussion] SIP original A-number

[杨伟]

Hi, Singleton

I am not very clear about you case.

In your case, you have three numbers,
caller 333-3333
original callee 111-1111
redirected callee 222-2222
Is this right?

So you add Diversion Header = 111-1111 in the SIP message to show the
original callee number.


Is my understanding correct?

Thanks
Richard



2008/8/28, Singleton, Andrew R. <ANDREW.SINGLETON at mcleodusa.com>:
>
>  The key is diversion header, your application server needs to be able to
> route advance on diversion.  I think some do this with history-info but not
> 100% sure on that one.  We use diversion.
>
>
>
> 333-3333 = Cell phone from external source
>
> 111-1111 = Customers desk phone (find me follow me, or call forward to
> 222-2222)
>
> 222-2222 = customers cell phone
>
>
>
>
>
> 333-3333->111-1111->222-2222
>
>
>
> In ISDN world you have:  OCN, original called number, calling party number,
> called party number and Redirecting number.  In our example:
>
> Calling party number:  333-3333
>
> OCN = 111-1111
>
> Called party number = 222-2222
>
> Redirecting number = 111-1111
>
>
>
> SIP:
>
> From = 333-3333
>
> To = 222-2222
>
> Diversion Header = 111-1111 (I believe populated from the ISDN OCN or
> Redirecting number, not 100% sure here.  Or if not ISDN, as in a IP PBX,
> this should be populated by the customer prem based equipment)
>
>
>
> There are other field but these are the important ones.
>
>
>
> The diversion header is the key.  So as long as the customers equipment
> populates the diversion header information, we are good.
>
>
>
>
>  ------------------------------
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Jimmy Svensson
> *Sent:* Wednesday, August 27, 2008 9:55 AM
> *To:* discussion at sipforum.org
> *Subject:* [SIPForum-discussion] SIP original A-number
>
>
>
> Hi!
>
>
>
> Is there any features in SIP to enable show original A-number? Any special
> fields that can be used?
>
>
>
> We as an operator use SIP-trunking to connect enterprise PBXes and see a
> demand to display the original A-number when doing an external forwarding.
> In this case someone calls an extension in the PBX that is forwarded to an
> external number. A new call leg is created to call this external number,
> here I want the original A-number to be shows as From but this is not
> allowed because of A-number-validation in our application server.
>
>
>
> Any good solutions/workarounds?
>
> Thanks!
>
>
>
> *Jimmy Svensson**
> *Network Engineer
> Technology Planning
>
> TDC Sverige AB
> Box 799
> SE-191 27 SOLLENTUNA
> Tel +46 8 563 101 23 dir.
> Tel +46 8 519 810 00 vxl.
> Mobil +46 701 81 01 23
> Email jimmy.svensson at tdc.se
> Web tdc.se
>
>
>
>
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