Avaya Communication Manager Administrator's Manual page 1792

Glossary and Abbreviations
D
D
DAC
1. Dial access code or Direct Agent Calling
2. See digital-to-analog converter
data channel
A communications path between two points used to transmit digital signals.
data-communications equipment (DCE)
The equipment (usually a modem, data module, or packet assembler/disassembler) on the network
side of a communications link that makes the binary serial data from the source or transmitter
compatible with the communications channel.
data link
The configuration of physical facilities enabling end terminals to communicate directly with each
other.
data module
An interconnection device between a BRI or DCP interface of the switch and data terminal equipment
or data communications equipment.
data path
The end-to-end connection used for a data communications link. A data path is the combination of all
elements of an interprocessor communication in a DCS.
data port
A point of access to a computer that uses trunks or lines for transmitting or receiving data.
data rate
See bit rate.
data service unit (DSU)
A device that transmits digital data on transmission facilities.
data terminal
An input/output (I/O) device that has either switched or direct access to a host computer or to a
processor interface.
data terminal equipment (DTE)
Equipment consisting of the endpoints in a connection over a data circuit. In a connection between a
data terminal and host, the terminal, the host, and their associated modems or data modules make up
the DTE.
dB
Decibel
dBA
Decibels in reference to amperes.
dBrnC
Decibels above reference noise with C filter.
DC
Direct current
DCE
Data-communications equipment
1792
(DAC).
Administrator's Guide for Avaya Communication Manager
November 2003