modem
A device that converts digital signals to analog for transmission over telephone lines and vice versa. Common in computing contexts.
インターネットに接続するためにモデムを設置した。
I installed a modem to connect to the internet.
I connected the new modem to my computer.
このモデムでインターネットに接続しています。
I'm connecting to the internet using this modem.
The modem hasn't been working well lately and keeps disconnecting.
null modem
modem connection
internal modem; integral modem
high-speed modem
modem card
Borrowed from English 'modem', short for 'modulator-demodulator'.