Lucent Technologies MERLIN LEGEND Release 6.1 System Planning Manual page 548

MERLIN LEGENDCommunications System Release 6.1
System Planning 555-661-112
Glossary
barrier code
basic carrier
baud rate
B-channel
Basic Rate
Interface
Bearer-channel
Behind Switch
mode
binary code
bipolar 8 zero
substitution
bipolar signal
bipolar violation
BIS
bit
bit rate
blocking
BMI
Password used to limit access to the Remote Access
feature of the system. In a private network , it is especially
important that barrier codes be required for all types of
remote access.
Hardware that holds and connects the processor module ,
power supply module , and up to five other modules in the
system. See also expansion carrier .
Strictly speaking, a measurement of transmission speed
equal to the number of signal level changes per second. In
practice, often used synonymously with bit rate and bps .
(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 .
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."
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)
Issue 1
August 1998
Page GL-4