Instruction manual
MERLIN LEGEND Communications System Release 5.0
System Planning
555-650-112
Issue 1
June 1997
Glossary
Page GL--5
D
CSU (channel service unit) Equipment used on customer
premises to provide
DS1
facility terminations and signaling
compatibility.
CTI Link (Computer Telephony Integration) link. A
hardware/software feature that is part of the PassageWay
Telephony Services application. It allows the use of Lucent
Technologies-certified software applications on a
LAN
running Novell NetWare software in a
Hybrid/PBX mode
system. These applications may provide special features
for client control of such calling activities as power dialing.
See also
screen pop.
Data-channel See
D-channel
.
data
communications
equipment
See
DCE
.
data module A type of
ISDN terminal adapter
that acts as the
DCE
at a
data workstation
that communicates over high-speed
digital
facilities.
data terminal An input/output device (often a personal computer) that can
be connected to the control unit via an interface.
data terminal
equipment
See
DTE
and
data terminal
.
data workstation Special type of extension where data communications take
place; includes
DTE
and
DCE
; sometimes a telephone is
also part of a data workstation.
DCE (data communications equipment) Equipment such as
modems
or ISDN terminal adapters used to establish,
maintain, and terminate a connection between the system
and data terminal equipment (
DTE
), such as printers,
personal computers, host computers, or network
workstations.
D-channel (Data-channel) 16- or 64-kbps channel that carries
signaling information or data on a
PRI
.
dedicated feature
buttons
The imprinted feature buttons on a telephone: Conf or
Conference, Drop, Feature, HFAI (Hands Free Answer on
Intercom), Hold, Message, Mute or Microphone, Recall,
Speakerphone or Spkrphone, and Transfer.
desktop
videoconferencing
system
A system application that allows face-to-face,
simultaneous video and voice communications between
individuals and requires high-speed
data transmission
facilities. See also
group videoconferencing system.
DFT (direct facility termination) See
personal line
.
dial access See
feature code
.