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  2. Telephone switchboard - Wikipedia

    en.wikipedia.org/wiki/Telephone_switchboard

    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.

  3. Switchboard operator - Wikipedia

    en.wikipedia.org/wiki/Switchboard_operator

    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.

  4. Telephone exchange - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange

    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 ...

  5. History of the telephone in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_the_telephone...

    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.

  6. Business telephone system - Wikipedia

    en.wikipedia.org/wiki/Business_telephone_system

    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 ...

  7. Field telephone - Wikipedia

    en.wikipedia.org/wiki/Field_telephone

    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.

  8. First Telephone Exchange - Wikipedia

    en.wikipedia.org/wiki/First_Telephone_Exchange

    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 ...

  9. Rotary dial - Wikipedia

    en.wikipedia.org/wiki/Rotary_dial

    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 ...