NonStop S-Series System Expansion and Reduction Guide

Glossary
G-Series Common Glossary
Glossary-9
branch circuit
branch circuit. The circuit conductors located between the equipment receptacles and the
final overcurrent device in a power distribution panel (PDP) that protect the circuits.
branded product. A software product that is licensed by X/Open to carry the X/Open or
UNIX trademark.
branding process. The activities that lead to the acceptance of a product by X/Open in
accordance with its Trade Mark Licence Agreement.
break condition. An event indicator or sequence of data from a terminal or terminal
emulator that requests interruption of an application program.
bridge rectifier. A full-wave rectifier with four elements, as in a bridge circuit. Alternating
voltage is applied to one pair of opposite junctions, and direct voltage is obtained from
the other pair of junctions.
BSD. Berkeley Software Distribution.
built configuration. A configuration revision for which a system image and activation
package have been created.
built-in command. In the Open System Services (OSS) environment, a command that is
implemented within the
/bin/sh file. Some built-in commands are also available as
separately executable files.
bypass mechanism. Equipment that permits switching from one power source to another.
For example, a bypass mechanism on an uninterruptible power supply (UPS)
would
switch to an alternative power source (such as a standby power generator or
commercial utility source) when maintenance must be performed on the UPS.
byte-synchronous. A type of Open Systems Interconnection (OSI) Layer-2 protocol that
uses synchronous transmission techniques and requires a character code to define
terminal and line control sequences. Data is always transmitted in a block.
cabinet. One or more modules of a system, housed together.
cable channel. A cable management conduit that protects the cables that run between two
system enclosures in a double-high stack. Each system enclosure has two cable
channels running vertically on its service side: one on the left-hand side of the
enclosure, and one on the right-hand side of the enclosure.
cable guidepost. A cable management rod that routes cables exiting the upper enclosure
in a double-high stack to prevent the cables from hanging down in front of the
customer-replaceable units (CRUs) in the base enclosure. A cable guidepost extends
from the base of each cable channel.
cable support. A piece of cable management hardware that secures system cables. The
cable support attaches to the service side of a system enclosure near the bottom of the
enclosure. Cable ties for securing system cables are threaded through the cable