[OpenSIPS-Users] Opensips 2.3.2

[mas_66 at tiscali.co.uk]

Hello there

I'm having an issue with placing external calls.
I can register softphones and place calls between them fine, but have failed in 
the next step which is to hook up to my SBC(working) to call the outside world.
On Opensips my interfaces (with fictional IP's are:

192.168.54.55 ENS160
(159.99.8.111 is my Public IP that points to LAN 192.168.54.55 for my 
softphones to register via)
172.23.100.55 ENS224(this communicates with an interface on my SBC 
172.23.100.250)

so  a call path will be:  159.99.8.111->192.168.54.55->172.23.100.55->172.
23.100.250->carrier

Im sure it has to do with the interface presented to my SBC which currently 
shows as extn111 at 192.168.54.55.
the call hits my SBC but no further, or my routing set up.
I want to force the call to be 111 at 172.23.100.55 but not sure how to.
I have experimented with domains and routing but as a new Opensipper im 
guessing a lot of it and trying to read online too but not much out there that 
relates.
If someone can offer some examples of Dynamic routing or anything that would 
help that would be great.

Many Thanks