Special Features:

Asynchronous; full duplex; data rates v.32 bis, v.22 bis, v.22; error control v.42 and mnp 2 to 4; data compression v.42 bis; external

Properties:

An item which modulates and demodulates one or more electrical signals. It connects data terminal equipment to a communication line or network such as telephone, radio or telegraph. It may include the multiplexing and demultiplexing circuits, circuit amplifiers and source(s) of carrier frequency. For items designed for light signals, see modem, fiber optic.