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Glossary
Glossary-33825-A2-GB30-20 November 1996
Customer 1 A user-defined configuration area containing customized configuration options for a specific
application.
Customer 2 A user-defined configuration area containing customized configuration options for a specific
application.
data bank An area within the modem used to store the modem’s firmware.
data carrier A continuous frequency signal that can be modulated by another signal that contains information
to be transmitted.
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 modem operating modes. When in Data mode, the modem transmits and
receives data instead of accepting commands.
DB-25 connector A 25-pin connector that is used to connect a cable which enables communications between two
devices.
dBm A decibel referenced to one milliwatt into 600 ohms. This unit measures relative signal power.
DCE The equipment (Data Communications Equipment or Data Circuit Terminating Equipment) that
provides the functions required to establish, maintain, and end a connection. This equipment also
provides the signal conversion required for communication between the DTE and the telephone
line. A modem is a DCE.
DCP Diagnostic Control Panel. The front panel of modems such as the 3810Plus, or the shared
controller of nest-mount modems such as the 3811Plus. The DCP permits control and
configuration of local and remote modems.
demodulation The process of recovering data from a modulated carrier wave.
dial command modifiers A modifier used in the dial string that instructs the modem how to process a dialed telephone
number.
dial line