Avaya MERLIN MAGIX Maintenance And Troubleshooting Manual page 272

Behind Switch Mode
One of three modes of system operation in which the control unit is connected to
(behind) another telephone switching system, such as
which provides features and services to telephone users. See also
Mode and Key Mode.
Binary Code
Electrical representation of quantities or symbols expressed in the base-2 number
system, which includes zeros and ones.
Bipolar 8 Zero Substitution
See B8ZS.
Bipolar Signal
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
Bit
Binary Digit. One unit of information in binary notation; it can have one of two
values–zero or one.
Bit Rate
Speed at which bits are transmitted, usually expressed in bps. Also called "data
rate."
Blocking
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.
BMI
Broadcast Music
Board
Module–for example, 100D or 408 MLX GS/LS–that allows you to connect lines/
trunks and extensions to the communications system.
Board Assignment
System Programming and Maintenance (SPM) procedure for assigning line/trunk
and extension modules to slots on the control unit.
Bipolar Violation.
AMI and B8ZS.
Incorporated.
Glossary
Centrex or DEFINITY,
Hybrid/PBX
GL-5