Avaya 6424D+M User Manual page 166

GL-4
GLOSSARY
designation strip
digital circuit packs
digital communications
protocol (DCP)
digital service level-1 (DS1)
digital signals cross-connect
(DSX)
digital terminal
digital terminal data module
(DTDM)
direct inward dialing (DID)
display module
distributed communications
system (DCS)
A clear plastic strip installed between the terminal strips of the
110A-type cross-connect blocks to hold and protect insert labels.
The circuit packs installed in port carriers to serve digital terminals.
A digital protocol used by AT&T System 85 and DEFINITY Generic
2 .
The multiplexing of 24 voice and/or data communication onto a
single channel for transmission.
A special cross-connect assembly used to terminate and cross-
connect cables carrying DS1 signals.
A terminal that uses the digital communications protocol (DCP) to
transmit voice, data and station control information to and from the
switch simultaneously through a two-wire-pair connection.
An add-on data module for the model 7403D and 7405D voice
terminals. It converts RS232C signals to digital communication
protocol (DCP) to permit an RS232C data terminal to share the voice
terminal's wiring connection to the switch.
A feature of the communications system that allows an incoming call
from the public network, not FX (foreign exchange) or WATS (Wide
Area Telecommunications Service) to reach a specific voice terminal
of the private network without attendant assistance.
A 40-character screen that attaches to the 7405D voice terminal to
display messages and calling information.
A private network of multiple switches with transparent operation of
certain attendant and terminal features between the switches. To
users, the DCS appears to be one switch.