INTRUDER AND FIRE ALARM SYSTEM Russian patent published in 2004 - IPC

FIELD: electronic and computer equipment, particularly for alarm signals transmission. SUBSTANCE: system for centralized property protection and fire protection of multisite objects with the use of engaged and commutable telephone lines includes at least one centralized observation station. Observation station has automated duty operator workplaces, which are formed as personal computers linked to each other by computing net. System also has communications muldem with automatic telephone system (ATS), modems communicating with ATS, group of automated signaling system users, group of non-automated signaling system users, ATS equipment set. Each ATS equipment set includes communications muldem with centralized observation station, modems communicating with centralized observation station, at least one interface block for communication with group of non-automated signaling system users. Each modem communicating with ATS and each modem communicating with centralized observation station are connected by straight pair of dedicated telephone line and at least by one commutable telephone line. EFFECT: increased number of protected objects, reduced cost in comparison with analogous systems having equal functional capabilities. 9 cl, 8 dwg