asterisk users - Dec 2007 - Can Asterix seperate the signalling and the media ip's with Quintum

New to Asterix and perhaps someone can help.

The plnned configuration is that the Quintums are to register to the Asterix 
and the signalling to be handled by the Asterix but the media (G 729 code) 
to be directed to the service provider.

Thanks Shaun