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COMSPHERE 3800 Series Modems
Glossary-4 September 1998 3810-A2-GB30-30
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 face of the modem that continuously provides status
information about the modem’s operation and allows an operator to manage its operation.
This is a generic term used for both the standalone and carrier-mounted models. See
SDCP.
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 A communications circuit that is established by a switched circuit connection in the dial
network.
dial network See PSTN.
Dial Standby A function available when the modem is operating in Dial Backup mode, allowing the
modem to switch back to lease-line operation while still maintaining the dial-line
connection.
dial string A series of characters that consists of numbers and modifiers used to dial a telephone
number.
digital signal A signal composed of only two discrete values, representing the binary digits 0 and 1.
directory location Nonvolatile memory that stores up to ten telephone numbers. Each directory location can
have up to 40 characters entered.
DOC Canadian Department of Communication.
download A process that transfers modem firmware from a locally attached PC to a modem or
allows the cloning of firmware from a local modem to a remote modem. Also, the
process of moving data from a host computer to an attached computer.
DTE The equipment (Data Terminal Equipment), such as a computer or terminal, that
provides data in the form of digital signals.
edit area A temporary work area used to view and change configuration options from the DCP
without impacting modem operation. The edit area can be loaded from one of five
configuration option areas, Active (Operating), Active (Saved), Customer 1, Customer 2,
or Factory.
EIA Electronic Industries Association. This organization provides standards for the data
communications industry.
EIA-232-D An Electronic Industries Association’s standard defining the 25-position interface
between data terminal equipment and data communications equipment.
EIA RS-366-A An Electronic Industries Association’s standard defining the 25-position interface
between data terminal equipment and data communications automatic calling equipment.