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Telephone switchboard. A telephone switchboard is a device used to connect circuits of telephones to establish telephone calls between users or other switchboards. The switchboard is an essential component of a manual telephone exchange, and is operated by switchboard operators who use electrical cords or switches to establish the connections.
A telephone switchboard is a device that allows telephone lines to be interconnected, enabling the routing of calls between different phones or phone networks. [17] The switchboard operator was a person who manually connected calls by plugging and unplugging cords on the switchboard.
Telephone exchange. A telephone operator manually connecting calls with cord pairs at a telephone switchboard. A modern central office, equipped with voice communication and broadband data capabilities. A telephone exchange, also known as a telephone switch or central office, is a crucial component in the public switched telephone network (PSTN ...
A telephone switchboard is a device that allows telephone lines to be interconnected, enabling the routing of calls between different telephones or telephone networks. [38] The switchboard operator was a person who manually connected calls by plugging and unplugging cords on the switchboard.
A business telephone system is a telephone system typically used in business environments, encompassing the range of technology from the key telephone system (KTS) to the private branch exchange (PBX). A business telephone system differs from an installation of several telephones with multiple central office (CO) lines in that the CO lines used ...
Field telephones are telephones used for military communications. They can draw power from their own battery, from a telephone exchange (via a central battery known as CB), or from an external power source. Some need no battery, being sound-powered telephones. Telephone linesmen ford Lunga River during the Guadalcanal Campaign of World War II.
Coy, who had developed the world's first commercial telephone switchboard, was inspired by Bell's discussion of a telephone exchange for business and trade. [1] On November 3, 1877, Coy applied for (and received) a franchise from the Bell Telephone Company for New Haven and Middlesex Counties, Connecticut on the agreement that Bell would own 35 ...
A rotary dial is a component of a telephone or a telephone switchboard that implements a signaling technology in telecommunications known as pulse dialing. It is used when initiating a telephone call to transmit the destination telephone number to a telephone exchange. On the rotary dial, the digits are arranged in a circular layout, with one ...