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COMSPHERE 3800 Series Modems – Model 3830
Glossary-4 August 1998 3830-A2-GB91-30
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 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. 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.
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.