Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 124)

Acronyms and Definitions
Glossary-4 Verilink Access System 2000: Basics
B
b See bit .
B See byte .
B3ZS See bipolar three-zero
substitution (B3ZS) .
B8ZS See binary eight-zero
substitution (B8ZS) .
BABT British Approvals Board for
Telecommunications, a standards
organization.
backbone network The core portion of a network
connecting various nodes. A
group of devices connected by
facilities operating at a higher
speed than individual links to
routers, muiltiplexers, and other
components on the network edge.
backup channel A seondary circuit path which
assumes a primary circuit function
if the primary circuit fails.
bandwidth The maximum available data rate
that information is sent over a
facility. The bandwidth of a T1 line
is 1.544 Megabits per second. The
bandwidth of an E1 line is 2.048
Megabits per second.
baud A measurement of signaling speed
for data transmission devices
(modem). Baud rate can be
determined by calculating the
maximum number of signaling
elements (or discrete waveforms)
generated per second.
BER See bit error rate (BER) .
BECN Backward Explicit Congestion
Notification. When a frame relay
network experiences congestion,
the network sends a bit to the
sending device to notify it that
congestion avoidance procedures
need to be initiated.
BERS See bit error rate seconds
(BERS) .
BES See bursty-errored second
(BES) .