Thanks for your reply, but I am not sure you still understand my request. I am not really asking for DID or anything like it.
I have 4 analog lines on the gateway. The gateway knows which line is 1, which is 2, which is 3, and 4. Each Analog line has it's own number. What I want to do is direct any call that comes in on line 4 to bypass the receptionist and go to another user/phone. I want ANY call coming in on that line to do this, not just specific calls, or caller id filtered calls. DID is not really what I am looking for in this case. What we want is a second avenue that special callers can use to bypass the receptionist and go to another person/phone. At this point anyone who calls us has to go through the receptionist, and we don't want that for all of our callers. It is not feasible to add tons of caller ID numbers to the routing list, many callers have several originating numbers, like cells, homes, offices, etc.
Thanks again for your time.