Protel 7000 and parts:

protel7000.jpgMost of our phones are Protel 7000. These are in widespread use in the US. If you were to buy a new Protel 7000, with a refurbished computer board, you'd have to pay $419.00. You'd then have to add a mounting backplate ($20), pedestal ($129), and enclosure ($129). So the new values of the phones we have would be a total $697, before tax and shipping.

More info on the specific parts we have (including some technical diagrams):

Programming guide to the Protel 7000

Payphone411 says: " we can program your [Protel] phone for FREE if its your personal phone, with ExpressNet Version 1.55":

Hacking Protel Phones: