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A fence-mounted perimeter intrusion detection system installed on a chain link fence. A perimeter intrusion detection system (PIDS) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area.
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The Underwriters Laboratories' UL 365 is a safety standard that governs the construction, performance, and maintenance of police station-connected burglar alarm units and systems. These systems are designed primarily for use in mercantile premises, including mercantile safes and vaults, as well as bank safes and vaults.
Guardian Alarm installs, monitors, and services home and business security systems. The company offers various security systems such as burglar alarm systems, 24/7 security monitoring, indoor and outdoor cameras, video surveillance, smart automation, access control systems, and fire, water, and carbon monoxide detection.
ADT began to expand into new areas, such as fire alarms and security alarms, between 1910 and 1930, but was kept separate from AT&T's Holmes alarm business. ADT became a publicly traded company in the 1960s. [12] In 1964, ADT was found to be a monopoly in restraint of trade. It was shown to provide almost 80% of the central station alarm ...
A voice-activated radio-dispatched alarm, or VARDA-alarm, is a type of burglar alarm that, when activated or "tripped", broadcasts the type of the alarm and the transmitter location over the local police radio frequency using a pre-recorded audio message. [1] In 1968, the voice-activated radio dispatched alarm (VARDA), was invented.