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Glossary
D
data compression
The elimination of empty fields, redundancies, and gaps in order
to reduce storage capacity needs and the amount of data to be
transmitted. Anything that is eliminated is restored after the data
is received.
Data mode
One of two general operating modes; the other is Command
mode. When in Data mode, the modem considers any input from
the computer to be data and transmits it across the telephone
line to the remote modem.
DCE
Data Communications Equipment. A modem.
dial command modifiers
A modifier used in the dial string that instructs the modem how
to process a dialed telephone number.
dial string
A series of characters that consists of numbers and modifiers
used to dial a telephone number.
digital signal
A type of signal used to transfer data between a locally attached
computer and a modem.
download
A file transfer in which a file is received from another computer.
DSR
Data Set Ready. A signal from the modem to the computer, sent
via Pin 6 of an RS-232 interface, that indicates the modem is
turned ON and is connected to the computer.
GL-4
Issue 2
July 1995
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