AT&T MERLIN LEGEND Release 3.1 System Manager's Manual page 390

Glossary
Automatic Route
Selection
auxiliary power unit
B
backup
barrier code
basic carrier
B-channel
Basic Rate Interface
Bearer-channel
Behind Switch
mode
BIS
bit
bit rate
BMI
board
board assignment
See ARS .
Device that provides additional power to the system.
Procedure for saving a copy of system programming onto
a floppy disk or memory card . See also restore.
Password used to limit access to the Remote Access
feature of the system.
Hardware that holds and connects the processor module ,
power supply module , and up to five other modules in the
system. See also expansion carrier .
(Bearer-channel) 64- or 56-kbps channel that carries a
variety of digital information streams, such as voice at 64
kbps, data at up to 64 kbps, wideband voice encoded at
64 kbps, and voice at less than 64 kbps, alone or
combined .
See BRI .
See B-channel .
One of three modes of system operation, in which the
control unit is connected to (behind) another telephone
switching system, such as Centrex or DEFINITY, which
provides features and services to telephone users. See
also Hybrid/PBX mode and Key mode .
(Built-In Speakerphone) Part of the model name of some
analog multiline telephones.
(binary digit) One unit of information in binary notation; it
can have one of two values, zero or one.
Speed at which bits are transmitted, usually expressed in
bps . Also called "data rate."
(Broadcast Music Incorporated)
A module, for example, 100D or 408 MLX GS/LS, that
allows you to connect lines/trunks and extensions to the
communication system.
System Programming and Maintenance (SPM) procedure
for assigning line/trunk and extension modules to slots on
the control unit.
System Manager's Guide
GL–3