[Serusers] peering

[Joao Pereira]

Hello to all
I whant my SIP clients to be able to do calls to any other SIP network, 
and to do It, I writed this line (for the IPTEL.ORG case):

     if(uri=~"@iptel.org"){     
        forward(iptel.org,5060);     
        break;
      }

But this way, I need to put theese 4 lines to all VoIP providers.
Is there any way of saying:
if( ! uri=~"@fccn.pt" ) {  # if the invite isnt for my domain (fccn.pt)
    send it to the correct domain

Thanks

João Pereira