Does anyone have an example cfg with a call forwarded from a trusted ip (ie, no registration is ever sent)?

This is what I am trying, but with no luck...

if (src_ip==DIALINGATEAY && method=="ACK" ) { record_route(); use_media_proxy(); setflag(1); log(1, "Prepaid Call ACK Detected\n"); rewritehostport("TERMGATEWAY:5060"); forward(uri:host, uri:port); break; };

Thanks, Doug