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Modern emergency telephone powered by sound alone. A sound-powered telephone is a communication device that allows users to talk to each other with the use of a handset, similar to a conventional telephone, but without the use of external power. This technology has been used since at least 1944 [ 1 ] for both routine and emergency communication ...
An electronic hook switch (EHS) is a device which electronically connects a wireless headset and phone. An EHS passes predefined signalling. Either bluetooth headset or DECT headset can be used. Users can handle calls with the headset only, freeing them from remaining next to the phone. Switching from handset to headset is typically ...
Plain Old Telephone Service (POTS), or Plain Ordinary Telephone System, [1] is a retronym for voice-grade telephone service employing analog signal transmission over copper loops. Originally POTS stood for Post Office Telephone Service as early phone lines in most parts of the world were operated directly by the local Post Office .
Apple’s AirPods Pro and Powerbeats Pro earbuds check most of the boxes we care about when it comes to wireless listening — quality sound, sleek design, and decent battery life. The one they ...
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Telephone jack and plug. A telephone jack and a telephone plug are electrical connectors for connecting a telephone set or other telecommunications apparatus to the telephone wiring inside a building, establishing a connection to a telephone network. The plug is inserted into its counterpart, the jack, which is commonly affixed to a wall or ...
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AT&T Merlin. AT&T Merlin is a corporate telephone system by American Telephone and Telegraph (AT&T) that was introduced in late 1983, when it was branded American Bell Merlin. After the breakup of AT&T in 1984, it was rebranded and later also supplied by Lucent and Avaya. The system was designed at the beginning of the 1980s prior to the Bell ...