Fire detection and alarm systems are installed to notify occupants of a fire, summon assistance to fight fires, and initiate automatic suppression systems. There are different types of automatic alarm initiating devices like heat, smoke, and flame detectors that sense fire. Indicating devices like audible alarms and visible strobes alert people of a fire. Automatic alarm systems transmit alarm signals off-site to notify emergency responders. These systems are supervised to ensure proper operation and may include auxiliary functions to support firefighting and safety.