Hello, we recently ordered a Cisco phone system which uses Cisco Call Manager and a bunch of 7961 IP Phones. We need the capability of masking our Caller ID, or "spoofing" our caller id some might say because we do business for many different cities and what we need is for instance if I'm calling from Detroit but I'm calling for a client in Chicago I need a Chicago number to show up. Is that possible with Cisco Call Manager, and if so, how? The main thing is, this has to work externally, we don't really care about what it will say on people's caller id when we're dialing internally. But we need it to say whatever we want when we make a phone call to an external caller. I've looked everywhere through the on-line manuals (we actually don't have the system yet but it's on order) but I don't see any specifics on it. Any ideas?