Telephone switchboard
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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 telep
PBX switchboard, 1975
Telephone operator, c. 1900
A large Bell System international switchboard in 1943
U.S. Air Force operator works a switchboard in the underground command post at Strategic Air Command headquarters, Offutt Air Force Base, Nebraska in 1967.
Switchboard operator
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In the early days of telephony, companies used manual telephone switchboards, and switchboard operators connected calls by inserting a pair of phone plugs into the appropriate jacks. They were gradual
Telephone switchboard
…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. The switchboard saw the peak of its use in the 20th century before wider adoption…
Seattle telephone operators in a private branch exchange in 1952
New York telephone exchange in the 1880s, with both men and women as operators
Paris telephone exchange, 1900
Telephone operators in Stockholm, Sweden 1902–1903