[Serusers] Communication between SER as Proxy and a SIP Server

[Anthony Chapellier]

Hi,

I need to configure SER as a SIP proxy and that all SIP requests go 
through SER. To do it, you normally add SER as an outbound proxy into a 
routing table in your SIP server. But actually I can't modify the server...

So, the solution I wish to implement is a way to register SER in SIP 
server as an "UAC" when it receives a REGISTER request from a real one. 
So first things first,  is it possible ?

I think you could do it by doing the following :

- Save UAC real location.
- Rewrite Contact Header Field in SIP packet request with SER IP adress 
and forward this request to SIP server.

Then when you receive a request from SIP server, SER searches for UAC 
real location and forward request to it.

So finally, how could you do it ? I tought I could use subst() function 
but it seems I can't master this function perfectly to make it work.

So does anyone have an idea ?

Thanks,

Anthony