A fire alarm system is number of devices working together to detect and warn people through visual and audio appliances whensmoke, fire, carbon monoxide or other emergencies are present. These alarms may be activated automatically from smoke detectors, and heat detectors or may also be activated via manual fire alarm activation devices such as manual call points or pull stations. Alarms can be either motorized bells or wall mountable sounders or horns. They can also be speaker strobes which sound an alarm, followed by a voice evacuation message which warns people inside the building not to use the elevators. These days fire alarm systems are divided in two general types:

1. Conventional Fire Alarm System: For residences, shops and small offices.

2. Addressable Fire Alarm System: For large buildings, malls, commercial complexes, etc.