Zhone IMACS 8000 User Manual page 761

B7R
Bit #7 Redundant
B7R card
A network card used to provide Network Management capability for the system.
B8ZS
Bipolar 8-Zero Substitution, a coding scheme that maintains minimum-ones density on a T1
line.
Baud Rate
A measure of transmission speed over an analog phone line
B-channel
In ISDN, a full-duplex, 64 kbps ("bearer") channel that carries user data.
BECN
Backward Explicit Congestion Notification
BER
Bit Error Rate, the number of errored bits divided by the total number of bits.
BERT
Bit Error Rate Tester
BES
A Bursty Errored Second is any second with more than one and fewer than 320 CRC-6 (ESF),
BPV (D4/D-frame), or CRC-4 (E1) errors
bit
Contraction of the words "binary" and "digit."
bps
Bits per second (not to be confused with Baud Rate)
BRI
Reference Guide E-3