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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.
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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.
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 ...
The company also provides 'security systems' such as access control, CCTV, intruder alarms, fire detection, video analytics and security and building systems integration technology. [78] ' Monitoring and response services' is another core service, where G4S provides key holding, mobile security patrol and response services and alarm receiving ...
In January 2020, Vivint completed a merger with Mosaic Acquisition Corp. and became a publicly traded company on the New York Stock Exchange. [19] In December 2022, NRG announced the acquisition of Vivint Smart Home for $2.8 billion in cash, adding home security and automation to its offerings, expected to close on the first quarter of 2023. [20]
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.
The Alexander M. Cutler Stock Index From April 2008 to December 2012, if you bought shares in companies when Alexander M. Cutler joined the board, and sold them when he left, you would have a -8.0 percent return on your investment, compared to a 2.9 percent return from the S&P 500.