SPS-31 Fire Alarm System is a computer-aided analogue addressable system designed for collecting and processing data and automatic detection of fire and pre-fire situations, indication of alarm and warning signals on built-in TsPI, VPI, PSI-1 (2) displays and transmitting them to external circuits, as well as transmitting current information on fire-hazardous situation in monitored premises to interfaced devices with generation of recommendations for crew acting in fire situation.