Johansson Olle E schrieb:
>
> 29 jan 2009 kl. 10.15 skrev Theo Zourzouvillys:
>
>> On Thu, Jan 29, 2009 at 8:53 AM, Klaus Darilion
>> <[email protected]> wrote:
>>
>>> Problem: How to signal the called phone number? Usually the called phone
>>> number is in the RURI, but the service provider retargets the RURI with
>>> the REGISTER contact, thus this information is lost.
>>>
>>> [snip]
>>>
>>> Any other workarounds left?
>>
>> strong consensus was reached at IETF 73 in minneapolis for adopting:
>>
>> http://tools.ietf.org/id/draft-rosenberg-sip-target-uri-delivery-00.txt
>
>
> From a quick reading, it only handles proxys and UAs, but not B2BUA's
> or gateways.
Just split it:
enterprise service provider
<--------------|---------------------------->
PBX <-----SIP---> Proxy <--SIP--> GW <---ISDN---
In this case the proxy could do routing instead of retargeting.
Now just consider Asterisk as Proxy and GW in one.
klaus
>
> I gather that the way to do this would be for Asterisk, receiving an
> ISDN call to 123456 and forwarding to a SIP account that has a valid
> registration, to add a History-info header with ;target in the initial
> outbound request in the SIP channel. This would apply to most equipment
> in VoIP service provider's networks.
>
> It would be good if this scenario could be added to section 5 of the draft.
>
> (Added the author, Jonathan Rosenberg, on the CC list)
> /O
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