The SK-FFT is a Fire Fighters Telephone
Communication System. The SK-FFT with keypad,
provides indications of phone activation, and
corresponding trouble conditions. The FFT-24 expander
board lets you add additional zones to the SK-FFT.
The SK-FFT can use one FFT-24 for a total of 48
zones. Each zone consists of one addressable monitor
module (SK-Minimon) and a minimum of one Fire
Fighter Telephone Jack (FFT-FPJ).