Modem

A device that allows a computer system to transmit data over telephone or cable lines.

A piece of hardware that lets one computer talk to another computer over a phone line.

Modulator-Demodulator (Telecomm/Computer term).

A modulator-demodulator. A hardware device used to connect a digital computer to an analogue telephone network by turning analogue signals into digital signals, and vice versa.

Acronym for modulator/demodulator. 1. In general, a device that both modulates and demodulates signals. 2. In computer communications, a device used for converting digital signals into, and recovering them from, quasi-analog signals suitable for transmission over analog communications channels. Note: Many additional functions may be added to a modem to provide for customer service and control features. Synonym signal conversion equipment. 3. In FDM carrier systems, a device that converts the voice band to, and recovers it from, the first level of frequency translation.