I have a program that runs on a server that only allows connections from 1 extension, but have 5 extensions that need to be able to call it. Is there a way to "mask" the extensions? For example, I want to be able to dial from extension 101 or 102 or 103 (etc.) to the 3CX server, but then have the receiving extension think that the call is coming from extension 100 regardless of the originating extension (to clarify, we would not be dialing from all extensions at the same time, only one would be in use at a time). Is this possible? Using 3CX free version (just downloaded, should be current version) and the 3CXPhone software program (also just downloaded, should be current).