Thanks to trunkslammer I finally found the manual that had more details about the control box. It says that C04-6 are optional. How the heck do I find out about the options installed/not installed. I was probably hooking up to a "dead" input.

I did but my buttset on the end of the line coming from the callbox (which was a cat5e twisted pair direct burial with no splices about 250'). I heard it ringing, but when I picked it up the person couldn't hear me and I couldn't hear them. My buttset could have been on mute a rookie mistake. I forgot to test voltage but I am sure that will tell me alot.

What is a "filtered 24vdc or 48vdc talk battery power supply". Do you have a link?

Anybody in Dallas that could knock this out for me in a couple of hours?