交こう換かん器きこうかんきMeanings1nountelephone switchboardRefers to the equipment used to manually connect telephone calls, especially in older systems.昔むかしの電でん話わ交こう換かん器きはオペレーターが手しゅ動どうで接せつ続ぞくしていた。Old telephone switchboards were manually connected by operators.
