초록 ▼

A security system consists of a central digital processor system, e.g., a general purpose computer, to which plural remote units are connected by a digital communications link, e.g., telephone. The remote units include plural alarm sensors such as intrusion and heat sensors. In a data base of the ce

A security system consists of a central digital processor system, e.g., a general purpose computer, to which plural remote units are connected by a digital communications link, e.g., telephone. The remote units include plural alarm sensors such as intrusion and heat sensors. In a data base of the central processor system are stored segments of data associated uniquely with remote premises having the remote units. The processor system includes a terminal for delivering alarm message reports, such as to a law enforcement agency. Specifically, the remote units have interrogation circuitry for interrogating the sensors to determine if they have been tripped, logic circuitry for causing transmission to the central processor system via the communications link of a sensor alarm data message in digital format signifying the sensor address and its tripped status. The central processor system includes correlation means for correlating the data message with the data base to determine logical validity or invalidity of the message. Means responsive to logical validity determination causes portions of the data message and corresponding segments of the data base to be assembled into an alarm message report for delivery by said terminal.

대표청구항 ▼

In a security system for centralized monitoring and selective reporting of alarm conditions at a plurality of distant remote units at corresponding remote premises, said system including a central digital processor system, a communications system for providing a digital communications link between s

In a security system for centralized monitoring and selective reporting of alarm conditions at a plurality of distant remote units at corresponding remote premises, said system including a central digital processor system, a communications system for providing a digital communications link between said central processor system and any of said remote units, said remote units being individually adapted for responding to a plurality of sensors each having a normal status or a tripped status, said tripped status resulting in response to occurrence of an alarm situation, said central processor system including a data base constituted by segments of stored preselected data associated uniquely with corresponding remote premises, and terminal means for delivering alarm message reports in a format useful for human intervention in such alarm situation, the improvement comprising interrogation means at individual remote units for interrogating said sensors to determine if each sensor has changed from normal status to tripped status, means responsive to detection of such change in sensor status for causing transmission to said central processor system via said communications link of a sensor alarm data message in a digital format signifying the address and tripped status of each tripped sensor, correlation means at said central processor system for logically correlating said sensor alarm dAta message with said data base to determine logical validity or invalidity of said sensor data message, and means responsive to a logical validity determination be said correlator means for causing at least portions of said sensor data message and corresponding segments of said data base to be assembled into an alarm message report for delivery by said terminal means.