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In this way, he quickly assembled a 700-alarm network, which his father then copied in New York. [8] In 1878, Holmes became the president of the newly established Bell Phone Company. While he sold his interests two years later for US$100,000, [9] he kept his rights to use the company phone lines for his alarm system. [8]
Each user was able to customize the AT&T Digital Life wireless system to fit their home. AT&T Digital Life offered packages, and with a basic system, users could add extra sensors, video cameras, motion sensors, or other devices. [4] AT&T Digital Life users were able to add additional AT&T Digital Life devices to the system at any time.
Sensors: In a security alarm, some sensors detect intrusions. Sensors' locations are at the perimeter of the protected area, within it, or both. Sensors can detect intruders by different methods. Alerting devices indicate an alarm condition. Most commonly, these are bells, sirens, also and or flashing lights. Alerting devices serve the dual ...
Around this time, Faraday began producing notification appliances, such as bells, horns, buzzers, etc. They also rebranded coded fire alarm stations from Holtzer-Cabot . From the 1930s to the 1960s, Faraday was known as " Sperti -Faraday", and the company moved to Adrian, Michigan . [ 1 ]
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Door and window sensors are also implemented in most home security systems. One part of the system is installed on the door or window itself while the other part is installed on the frame of the door or window. The two part system connects securely when a door or window is closed, creating a security circuit. [5]
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Soon after came the wall switch module and the first X10 timer. In the 1980s, the CP-290 computer interface was released. Software for the interface runs on the Commodore 64, Apple II, classic Mac OS, MS-DOS, and Microsoft Windows. In 1985, BSR went out of business, and X10 (USA) Inc. was formed.
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