I'm trying to setup an extension to send a call to a user as a DID number not their user. I want to be able to do one of two things: One, I want the Request URI to match the contact from their REGISTER and To header to be "+1NXXNXXXXXX@contactdomain" Two, I want to make both the Request URI and the To header be "+1NXXNXXXXXX@contactdomain". I looked at "force-user" but that gives me the ability to do one DID to a user (by forcing the user to the DID). So, how do I need to setup the call for these scenarios?