Can someone explain the outbound prefix for the callback option please? Am I correct in assuming that I set an arbitrary number for the prefix, then create outbound rules that match that prefix, and then strip the prefix? I currently have three main outbound rules (7, 10, and 11 digits) which do not prepend or strip any digits; the calls go outbound the same as they're dialed. Can I simply recreate these same outbound rules, but with the callback outbound prefix and then stripped? Will that make it work for any incoming number that needs to be called back, calling it back exactly as the CID came in?