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The head mount freed the switchboard operator's hands, so that he could easily connect the wires of the telephone callers and receivers. The head-mounted telephone receiver in the singular form was called a "headphone". These head-mounted phone receivers, unlike modern headphones, only had one earpiece. By the 1890s a listening device with two ...
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 baseboard.
A graphic symbol that designates a handset is used on cordless and mobile phones to specify placing or ending a telephone call. Usually a button with green upright (off-hook) handset icon is used for starting a call, and a red lying-down (on-hook) handset is used for ending a call. [1] Unicode provides the U+1F4DE 📞 TELEPHONE RECEIVER symbol.
v. t. e. A cellular network or mobile network is a telecommunications network where the link to and from end nodes is wireless and the network is distributed over land areas called cells, each served by at least one fixed-location transceiver (typically three cell sites or base transceiver stations ). These base stations provide the cell with ...
Model 302 telephone. The model 302 telephone is a desk set telephone that was manufactured in the United States by Western Electric from 1937 until 1955, and by Northern Electric in Canada until the late 1950s, until well after the introduction of the 500-type telephone in 1949. The sets were routinely refurbished into the 1960s.
Commercial and general aviation(GA) civil aircraft headsets often use a pair of phone connectors. A standard 1⁄4-inch (6.3 mm) 2 or 3-conductor plug, type PJ-055, is used for headphones. For the microphone, a smaller 3⁄16-inch (0.206 inch / 5.23 mm) diameter 3-conductor plug, type PJ-068, is used.
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