[asterisk-users] Outbound Calls via Proxy to use Call ID from registration

[Joshua Colp]

On Mon, Aug 28, 2017, at 05:45 AM, Benoit Panizzon wrote:
> Hello List
> 
> > I work at an SIP Provider and we have added and SBC in front of our
> > Voice Switch to protect it.
> 
> Well using two peers for incomming and outgoing calls solve the
> previous issue.
> 
> Now I have a new one.
> 
> The SBC in use needs to match incomming calls from the asterisk with
> the call id used in the registration.
> 
> We have tested this with a couple of PBX, which do use the call ID used
> during registration automatically for outbound invites.
> 
> Not so my asterisk server.
> 
> So I assumed that when I refer to a 'peer' definition in the register
> statement, I could make asterisk understand, that the registration and
> outgoing peers belong together and then use the same call ID.

Can you define what exactly you mean by call id? If you are referring to
the Call-ID SIP header that's not how it works. It's unique within a
dialog and not reused like that[1][2].

[1] https://tools.ietf.org/html/rfc3261#page-37
[2] https://tools.ietf.org/html/rfc3261#section-20.8

-- 
Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
Check us out at: www.digium.com & www.asterisk.org