Instruction manual

MERLIN LEGEND Communications System Release 5.0
Installation
555-650-140
Issue 1
June 1997
Glossary
Page GL-5
B
B8ZS (bipolar 8 zero substitution) Line-coding format that
encodes a string of eight zeros in a unique binary
sequence to detect
bipolar violation . See also bipolar
signal.
backup Procedure for saving a copy of system programming
onto a floppy disk or
memory card . See also restore .
bandwidth Difference, expressed in hertz, between the highest
and lowest frequencies in a range that determines
channel capacity.
barrier code Password used to limit access to the
Remote Access
feature of the system.
basic carrier Hardware that holds and connects the
processor ,
power supply , and up to five modules in the system.
See also expansion carrier
.
baud rate 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 .
B-channel (Bearer-channel) 64-kbps channel that carries a vari-
ety 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
.
Bearer-channel See B-channel.