Table of Contents
Advertisement
backbone
backplane
backup
field-replaceable unit
backup FRU
bandwidth
baud
BB_Credit
beaconing
ber
bezel
bidirectional
bit
Cable on which two or more stations or networks may be attached,
typically used to link computer networks at one site with those at
another. Smaller branch networks are sometimes called ribs.
The backplane provides direct current (DC) power distribution and
connections for all logic cards.
Backup FRU. When an active FRU fails, an identical backup FRU
takes over operation automatically (failover) to maintain director or
switch and Fibre Channel link operation. See also
able
unit.
See
backup field-replaceable
(1) The amount of data that can be sent over a given circuit. (2) A
measure of how fast a network can move information, usually mea-
sured in Hertz (Hz).
The unit of signaling speed, expressed as the maximum number of
times per second the signal can change the state of the transmission
line or other medium. The units of baud are seconds to the negative 1
power. Note: With Fibre Channel scheme, a signal event represents a
single transmission bit.
See
buffer-to-buffer
credit.
Use of light-emitting diodes (LEDs) on ports, port cards,
field-replaceable units (FRUs), and directors to aid in the fault-isola-
tion process. When enabled, active beaconing will cause LEDs to flash
in order for the user to locate field-replaceable units (FRU's),
switches, or directors in cabinets or computer rooms.
See
bit error
rate.
A removable panel that covers empty drive bays and port cards.
In Fibre Channel protocol, the capability to simultaneously communi-
cate at maximum speeds in both directions over a link.
Abbreviated as b. (1) Binary digit, the smallest unit of data in comput-
ing, with a value of zero or one (D). (2) A bit is the basic data unit of
all digital computers. It is usually part of a data byte or data word;
however, a single bit can be used to control or read logic ON/OFF
functions. (3) A bit is a single digit in a binary number. Bits are the
active field-replace-
unit.
Glossary
517
Advertisement
Table of Contents
