modem
A device that converts digital signals to analog for transmission over telephone lines and vice versa. Common in computing contexts.
I connected the new modem to my computer.
I installed a modem to connect to the internet.
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'.