クロスバー交こう換かん機き

noun

crossbar switchboard

A type of telephone exchange that uses a matrix of horizontal and vertical bars to connect circuits. Technical term used in telecommunications engineering.

• クロスバー交こう換かん機きは、かつて電でん話わ局きょくで広ひろく使つかわれていた。

  Crossbar switchboards were once widely used in telephone exchanges.