電でん話わ交こう換かん局きょく

noun

telephone exchange; telephone switching station; central office

Technical term for a facility that connects telephone calls; used in telecommunications contexts.

• この地ち域いきの電でん話わ交こう換かん局きょくは、最さい新しんのデジタル設せつ備びに更こう新しんされた。

  The telephone exchange in this area has been upgraded to the latest digital equipment.