[Freeswitch-users] internal/external dialing between different domains

Hello, what is the best way to dial between domains (multi tentat) on same FS? Is better to route it internal or external (sbc send it back and use public dialplan to send it to right domain)? What would be the best way to route it internally, so that dialplan would not change if I add more domains? Users are now registered like this: if domain is enterprise.test.com, user will be number.enterprise. Thanks! BR; Miha