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bn:02210769n
Noun Concept
Categories: All articles needing additional references, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Telephone exchanges, History of telecommunications
EN
telephone switchboard  cordboard  Manual exchange
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. Wikipedia
Definitions
Relations
Sources
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. Wikipedia
IS A
telecommunications equipment
HAS INSTANCE
DMS-100
Wikipedia
EN
telephone switchboard
Wikidata
EN
telephone switchboard
Wikipedia Redirections
EN
cordboard, Manual exchange

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