With a Conventional Fire Alarm System, physical cabling is used to connect several points and detectors. The signals which are generated from the devices are wired directly back to the main control unit. The control panel displays a signal when these components activate.
The main problem with conventional fire alarm systems is that when a fire alarm component produces a signal and it appears on the control panel there is no way to know which component it is in the building. Therefore, all points and detectors with a conventional system are arranged in “Zones” to simplify locating the cause of the alarm. Each zone is indicated at the Fire Alarm Control Panel either with an indicator lamp, a text display or in some cases both. The Control Panel is wired to a minimum of two sounder circuits. These circuits could contain bells, electronic sounders or other audible devices. These devices would sound if the alarm were triggered.