Good idea, maybe I can social engineer a COCOT company out of the administration software? Some things that might make it easier to figure out a way:
1) The COCOT accepts incoming calls, even though it says "No Incoming Calls." When I called it from a cell phone, on both ends, it said "Payphone, Payphone" but then it let me talk on both ends. Maybe the COCOT owner didn't configure it properly, since it says "No Incoming Calls"?
2) When I was trying the 800# hangup trick, I noticed that on one number, I got a message saying that the number was not accessible from a payphone. I don't remember the number as I was just dialing any random number.
3) The rates are expensive which is the second clue that it's a COCOT - 50 cents for 5 minutes, and it also doesn't state Qwest on the payphone. Qwest payphones are 50 cents for unlimited minutes on local calls, if I recall correctly. I believe it also has *11 for collect calls.
4) The payphone looks like this:
http://www.payphone-directory.org/7022154056.jpg. One thing about it is that the box next to the coin return thing is black, not metal like some of the other ones I've seen.