[asterisk-users] RTP IP re-write

[Joshua Colp]

Thomas Kenyon wrote:
> I am having a problem trying to get a particular softphone working on my
> setup.
>
> The machine it runs on has more than one interface. When the softphone
> registers, it registers fine, and asterisk is given the correct IP for
> registration.
>
> Whenever RTP is set-up however, the client gives the wrong IP to connect
> to and I get the inevitable problem with one-way media.
>
> Is there any way of forcing that SIP account to have the rtp always sent
> to a particular IP. (I know that this still may not work, because the
> device is probably listening on the wrong interface as well, but it's
> worth a try).

It's not possible to do this as you describe but if you set "nat=yes" 
the RTP module will lock on to the source of the incoming media after a 
certain number of packets. This does require that the softphone send 
packets to Asterisk and that they make it, of course.

Cheers,

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