LSTI-AN system enables the realization of automatic telephone communication for the fast information flow between plant personnel and mine dispatcher (after pressing the button DYSP or ALARM) and sending the information and orders between the plant employees during the regular mine exploitation. It can be used as telephone communication system and emergency-loudspeaking system, as well as for the remote control of safety and production parameters in small working or liquidated methane and non-methane mining plants where the maximum number of underground facilities do not exceed 64 pieces, or as a local telephone communication system for the underground hauling. It can be also utilized at coke, chemical, petrochemical and other plants characterized by high degree of explosion hazard of the II group.