Lucent Technologies MERLIN LEGEND Release 7.0, System Programming Manual

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MERLIN LEGEND Communications System Release 7.0
System Programming
555-670-111
Issue 1
April 1999
Glossary
GL-9
D
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 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 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.
D-Channel
Data-Channel
. 16- or 64-kbps channel that carries
signaling information or data on a PRI or BRI .
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.