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MERLIN LEGEND Communications System Release 6.0
System Manager’s Guide
555-660-118
Issue 1
February 1998
Glossary
Page GL-8
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.
cyclic redundancy
check
See
CRC
.
D4 framing format
Framing format
consisting of a sequence of individual
frames of 24 eight-
bit
slots and one signal bit (193 bits) in a
12-frame superframe. See also
ESF
.
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 rate See
bps
.
data station Special type of extension where data communications take
place; includes
DTE
and
DCE
; sometimes a telephone is
also part of a data station.
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.
DCP (Digital Communications Protocol) AT&T proprietary
protocol to transmit digitized voice and data over the same
communications link.