Here's an overview of the Radionics D8112 panel, a pretty neat system that has a lot of features. I'll be demonstrating the more complicated stuff it can do later on but for now this shows the basic operation and the neat keypad tones.
Thanks to the HappyJigg brothers for getting some of these older keypads for me, go check out their channel:
https://www.youtube.com/user/HappyJigg
