音おん響きょうカプラ

noun

acoustic coupler

A device that converts digital signals into sound for transmission over telephone lines, used historically with modems.

• 昔むかしのパソコン通つう信しんでは音おん響きょうカプラを使つかって電でん話わ回かい線せんに接せつ続ぞくした。

  In the early days of PC communication, we connected to the telephone line using an acoustic coupler.