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An electric switchboard is a piece of equipment that distributes electric power from one or more sources of supply to several smaller load circuits. It is an assembly of one or more panels, each of which contains switching devices for the protection and control of circuits fed from the switchboard. Several manufacturers make switchboards used ...
The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or switches to establish the connections. The electromechanical automatic telephone exchange, invented by Almon Strowger in 1888, gradually replaced manual switchboards in central telephone exchanges ...
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.
A telephone switchboard is a device that allows telephone lines to be interconnected, enabling the routing of calls between different telephones or telephone networks. The switchboard operator was a person who manually connected calls by plugging and unplugging cords on the switchboard.
The Kellogg Switchboard and Supply Company was an American manufacturer of telecommunication equipment. Anticipating the expiration of the earliest, fundamental Bell System patents, Milo G. Kellogg, an electrical engineer , founded the company in 1897 in Chicago to produce telephone exchange equipment and telephone apparatus.
Switchboard [1] is the second-oldest LGBT+ telephone helpline in the United Kingdom, launched the day after Edinburgh Befrienders (later known as Lothian Gay and Lesbian Switchboard ). Switchboard was launched in March 1974 as the London Lesbian and Gay Switchboard, providing help and information to London's gay community, particularly in the ...
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