Modems

Modems

Modems are devices that modulate an analog carrier signal to encode digital information.

Industry: Network hardware

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Modems

Digital loopback

Network hardware; Modems

A test that cheques the modem's RS-232 interface and the cable that connects the terminal or computer and the modem. The modem receives data (in the form of digital signals) from the computer or ...

Digital signals

Network hardware; Modems

Discrete, uniform signals. In this manual, the term refers to the binary digits 0 and 1.

Data terminal equipment (DTE)

Network hardware; Modems

A computer that generates or is the final destination of data.

Duplex

Network hardware; Modems

Indicates a communications channel capable of carrying signals in both directions. See half-duplex, full-duplex.

Error control

Network hardware; Modems

Various techniques that cheque the reliability of characters (parity) or blocks of data. V.42 and MNP error-control protocols use error detection (CRC) and retransmission of flawed frames (ARQ).

Ethernet

Network hardware; Modems

The LAN method developed by Xerox. Uses the CSMA/CD physical access method, special 50 ohm co-axial cable and 10 million bit per second digital transmission.