A conventional fire alarm system consists of automatic detectors and manual call points wired to the fire alarm control panel in zones. Each zone is a physical wiring circuit. The fire alarm control panel has zonal LEDs which will illuminate should a device in that zone be activated. The purpose of zones is to narrow down and indicate the location of a possible fire or fault. The control panel is then wired separately to a minimum of two sounder circuits which accommodate the systems audible warning devices. Each detection circuit and sounder circuit has an end of line device for monitoring purposes.