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Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference,
History of telecommunications,
Telephone exchanges
EN
telephone switchboardcordboardManual exchange
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EN
A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century.
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A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century.
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Tuwali Ifugao
Hidatsa
Halkomelem
Ahtna
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