AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 390

Glossary
Bearer-channel
Behind Switch mode One of three modes of system operation, in which the
binary code
bipolar 8 zero
substitution
bipolar signal
bipolar violation
BIS
bit
bit rate
blocking
BMI
board
See B-channel .
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 .
Electrical representation of quantities or symbols
expressed in the base-2 number system, which includes
zeros and ones.
See B8ZS .
Digital signal in which pulses (ones) alternate between
positive and negative. See also AMI , B8ZS , and bipolar
violation .
Condition occurring when two positive or two negative
pulses are received in succession. See also AMI and
B8ZS .
(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." See also baud rate.
Condition in which end-to-end connections cannot be
made on calls because of a full load on all possible
services and facilities. See also glare.
(Broadcast Music Incorporated)
A module , for example, 100D or 408 MLX GS/LS, that
allows you to connect lines/trunks and extensions to the
communications system or holds the processor or power
supply.
Maintenance and Troubleshooting
GL–5