Anyone still make a polarity reversal central monitor system

FireLite 4XTMF.

If not, they're not difficult to make ...... depending upon the source equipment and voltage.

There's always that company out in ( I think) California called OFA if you're looking for a specific Mfgs piece of equipment. They supply old stuff.

If you want to follow that lead, let me know, I've got the address/ telephone number someplace. I'll look it up for you.

I used to have good luck looking for old stuff on equipment matching. Rojas origianlly pointed me to them.

Small town?? Heck most of the Chicagoland metro area is still using r.p. for fire alarm signal transmission. Most manufactures still make an r.p. module (or have some way of making it happen.) Try finding parts for the old Keltron tone cards...

Jewellfish

Or the Ademco Modularm, #130 or 131.

I think we have some Old Diebold Central Station Direct Wire Receiver Housing, Power Supplies and Modules somewhere if they will do you any good. We would not have any of the subscriber alarm modules.

Bob. I have a bunch of Ademco equipment laying around in my basement .

Plus two (2) chip programmers.