[asterisk-users] Using Asterisk to route call via an outbound proxy

Nitesh Bansal nitesh.bansal at gmail.com
Wed Apr 13 15:11:27 CDT 2016

I'm using chan_sip, I experimented with adding a 'Route' header in the
originate command and used the Dial command like 'SIP/peer/exten', but
is that Request-URI isn't populated correctly.
I'm using Asterisk 13.


On Wed, Apr 13, 2016 at 10:09 PM, Joshua Colp <jcolp at digium.com> wrote:

> Nitesh Bansal wrote:
>> Hello,
>> I want to use Asterisk to use Kamailio as an outbound proxy for routing
>> calls to remote SIP end points, one option could be to use a default
>> peer, but in my case, my outbound proxy can change
>> based on the remote end point, so this option doesn't work.
>> And another problem is that I don't know how to configure Asterisk to
>> prepare the Request-URI
>> based on the remote end point and not based on the outbound proxy address?
>> What is the best way to do it?
> You'll have to be specific with the channel driver in use. Speaking from
> chan_pjsip it does not have a mechanism to set the outbound proxy on a
> per-call basis, it's strictly controlled by the endpoint. You'd need
> multiple or construct endpoints dynamically (for example using the ARI push
> configuration). As for not rewriting the request URI you need to use loose
> routing by specifying ;lr in the outbound proxy URI.
> Example:
> sip:example.com;lr
> If used in a configuration file:
> sip:example.com\;lr
> The '\' is so the configuration parser does not treat it as a comment.
> Cheers,
> --
> 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
> --
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