Because of the whole POTS line/FCC issue, we just replaced our security alarms to work over DCHP.
Our security company gave us the DMP 7073 LED Keypad. (Digital Monitoring Products, Inc.)
It has a built in Internal Access Control Reader that is 125kHz. Works great with my NExT Implant!
Just scan and it controls the electronic lock and opens our server room.
Disclaimer: I didn’t do that bad wiring 