On 26 Mar 2014, at 19:14, Mickael MONSIEUR <mickael.monsi...@gmail.com> wrote:

> Hello,
> 
> When I get a SIP INVITE as follows: 
>> INVITE sip:s@10.1.0.191:5060 SIP/2.0
>> Max-Forwards: 69
>> From: "0475XXXXXX" <sip:1053...@sip.domain.com>;tag=as7df9ab18
>> To: <sip:02XXXXXX@IP:5060>
>> Contact: <sip:1053212@IP:5060>
>> Call-ID: 344d42bd16975a54141d11f635bdf...@sip.domain.com
>> CSeq: 102 INVITE
>> Date: Wed, 26 Mar 2014 15:06:01 GMT
>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, 
>> PUBLISH
>> Supported: replaces, timer
>> Content-Type: application/sdp
>> Content-Length: 252
>> 
> 
> Asterisk considers that the extension is 's'. (The Register) 
> How to make the extension number that is shown in the 'To' ??

You never route calls on the To: header in SIP. You route on the request URI. 
Unless this is something where you used the REGISTER statement in sip.conf and 
forgot to add an extension or you register once for multiple DIDs.

I would suggest changing your register statement to include an extension. In 
that extension you read the To: header with the SIP_HEADER() dialplan function 
and issue a goto so you end up with the extension in the To header.

The IETF has with help of the SIP forum written a standard extension to SIP to 
handle this use-case, something called GIN. It's now part of the SIPConnect 
specification. using the gin extension, you would get the called phone number 
in the r-uri.

/O

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