Lucent Technologies PacketStar PSAX, User Manual

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255-700-243 Glossary-7
PacketStar
®
PSAX 12-Port Medium-Density DS1 Multiservice Module User Guide , Issue 1 Release 8.0
Glossary
Bc committed burst size. This parameter is used in frame relay,
and is the maximum number of bits transferred during time
interval “T.” Time interval “T” is the time interval over which
the number of bits used to average the number of bits trans-
mitted is averaged. The formula to calculate “T” is:Bc/CIR = T.
Be excess burst size. This parameter is used in frame relay, and is
the maximum number of uncommitted bits transferred dur-
ing time interval “T”. The formula to calculate “T” is:
Bc/CIR = T.
bearer channel This basic communication channel has no enhanced or value-
added services other than bandwidth transmission capability.
Bellcore The research and development arm formed by the Regional
Bell Operating Companies (RBOCs). Bellcore, now Telcordia
Technologies, focused on developing standards and proce-
dures for the RBOCs. A prime example is the Bellcore stan-
dard NEBS, Network Equipment Building Standards. Net-
work carriers who interoperate with RBOCs typically are
required to obtain Level 3 NEBS compliance on their tele-
communications equipment.
BER bit error rate. This parameter is the ratio of error bits to the
total number of bits transmitted, usually expressed as a num-
ber to the power of 10.
binaries Software programs written in binary, machine-readable code
that has been compiled or assembled.
bipolar 8 Zero substitution See B8ZS.
B-ISDN Broadband Integrated Services Digital Network. This type of
communications channel has the capability to integrate any
type of communications signals (voice, data, image, or multi-
media) and carry them over a single broadband channel at
150 Mbps, and higher.
bit The word created from the term binary digit , which represents
the value high or low, or yes or no. A bit is written as either
the value zero or the value 1.
bit error rate See BER.
bit stuffing The technique of inserting a zero-bit into a string of one-bits
to prevent the receiver from interpreting the series of one-bits
as something else, such as a flag control character. The sender
inserts the zero-bit automatically, and the receiver automati-
cally deletes it.
BITS building integrated timing supply. A single-building master
timing that provides and distributes timing to a wireline net-
work’s lower levels.
bits per second See bps.