3Com U.S. Robotics 56K Voice User Manual page 51

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-T V.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