Special Features:

4-wire or 2-wire telephone facility compatible, microwave, or other transmission; 16 digital control inputs/outputs; fifteen analog 0-5v level inputs; automated digital & analog loop back; audio bandpass is 300 hz to 1800 hz + 1/-3 db; voltage-12 to 28 vdc and/or 120/240 vac, 47-63 hz; transmitting and receiving impedance 600 ohms

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.