Mike:
Maybe some of the other guys will know something about this. I have worked with ModKeys for a long time--but never put that 60005 on one. In fact, I can't remember even seeing one. How do you test the thing to see if it works? The manual sure doesn't have a whole lot on the subject---but on page 5-10 it does say that you "Dial "08" then press the MEM key to speak to the person at the door. Release the MEM key to hear the person talk to you." What I don't quite get is why do you have to go into Program #3---I thought that was just for C.O. line ringing. Isn't this just a station to station (intercom) call? ..or is this what the box is doing --from station 08 to a line port?? Would Program #7 have anything to do with anything?
I'll keep looking around. I'm curious about this whole thing. Good Luck.