3Com 1.024.1644-00 Glossary, Default, Detect phase, Dictionary, Digital loopback, Digital signals

Glossary

DCE

Data Communications (or Circuit-Terminating) Equipment is equipment such as dial-up modems that establish and control the data link via the telephone network.

default

Any setting assumed, at startup or reset, by the computer's software and attached devices. The computer or software will use these settings until changed by the user or other software.

detect phase

In the ITU-TV.42 error-control protocol, the first stage in establishing if both modems attempting to connect have V.42 capability.

dictionary

The term used for compression codes built by the V.42 bis data compression algorithm.

digital loopback

A test that checks the modem's RS-232 interface and the cable that connects the terminal (computer) and the modem. The modem receives data (in the form of digital signals) from the computer or terminal, and immediately returns the data to the screen for verification.

digital signals

Signals that are discrete and uniform. In this manual, the term refers to the binary digits 0 and 1. These signals are in contrast with analogue signals.

DTE

Data Terminal (or Terminating) Equipment is a computer that generates or is the final destination of data.

duplex

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

EIA

Electronic Industries Association is a group which defines electronic standards in the U.S.

56K Voice Faxmodem Internal - User’s Guide 45