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Glossary
Glossary-33980-A2-GB30-40 October 1998
An outlet on equipment and cables that provides a connection.
Central Processing Unit. The main or only computing device in a data processing system.
Canadian Standards Association.
Clear To Send. A signal indicating that the device is ready for the DTE to transmit data. Usually
occurs in response to Request To Send (RTS).
A user-defined configuration area containing customized configuration options for a specific
application.
A user-defined configuration area containing customized configuration options for a specific
application.
An area within the modem used to store the modem’s firmware.
A continuous frequency signal that can be modulated by another signal that contains information
to be transmitted.
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 compressed is restored after
the data is received.
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.
A 25-position connector used on cables or devices.
A decibel referenced to one milliwatt into 600 ohms. This unit measures relative signal power.
Data Communications Equipment. The equipment that provides the functions required to
establish, maintain, and end a connection. It also provides the signal conversion required for
communication between the DTE and the network.
Diagnostic Control Panel. The front panel of a device that continuously provides status
information about the device’s operation and allows an operator to manage its operation. A
generic term used for both the standalone and carrier-mounted models.
The process of recovering data from a modulated carrier wave.
A modifier used in the dial string that instructs the modem how to process a dialed telephone
number.
A communications circuit that is established by a switched circuit connection in the dial network.
See PSTN.
A series of characters that consists of numbers and modifiers used to dial a telephone number.
Nonvolatile memory that stores up to ten telephone numbers. Each directory location can have
up to 40 characters entered.
Canadian Department of Communication.
A process that transfers device firmware and software from a locally-attached PC to a device, or
allows the duplication of firmware and software from a local device to a remote device.
Data Set Ready. A signal from the modem to the DTE that indicates the modem is turned ON
and connected to the DTE.
Data Terminal Equipment. The equipment, such as a computer or terminal, that provides data in
the form of digital signals for transmission.
connector
CPU
CSA
CTS
Customer 1
Customer 2
data bank
data carrier
data compression
Data mode
DB25 connector
dBm
DCE
DCP
demodulation
dial command
modifiers
dial line
dial network
dial string
directory location
DOC
download
DSR
DTE