ATM Adapter Installation and Support Guide

Glossary
ATM Adapter Installation and Support Guide—420013-002
Glossary-2
communications subsystem
communications subsystem. The combination of data communications hardware and
software processes that function together as an integrated unit to provide services and
access to wide and local area networks.
Compaq TSM package. A software product for NonStop S-series servers that provides the
information needed to perform functions such as querying resources and testing,
provides notification of problems on the system, and allows local or remote access to
the system for service and maintenance. See also HP NonStop™ Open System
Management (OSM) software.
configuration. (1) The arrangement of enclosures, system components, and peripheral
devices into a working unit. (2)þThe definition or alteration of characteristics of an
object.
controller. See ServerNet addressable controller (SAC).
CRU. See customer-replaceable unit (CRU).
customer-replaceable unit (CRU). A subset of field-replaceable units (FRUs) that can be
installed and serviced (replaced) by customers, without using special tools or special
HP training. CRUs can be replaced while the system is running. See also field-
replaceable unit (FRU).
download. The process of loading software into a device.
enclosure. Similar to a cabinet in NonStop K-series systems. An enclosure can contain
components of a system or a peripheral, such as a card cage, a backplane, a disk
drive, or a fan. Base enclosures are placed on the floor and can have other enclosures
stacked on top of them. Stackable enclosures can be place on top of other enclosures.
error. A condition encountered when performing a command or other operation that causes
the command or operation to fail.
fabric. A simplified way of representing a complex set of interconnections through which
there can be multiple and (to the user) unknown paths from point to point. The term
fabric is used to refer to the X or Y portion of the ServerNet system area network
(ServerNet SAN), for example the X fabric.
fault tolerance. The ability of a HP NonStop server to continue processing despite the
failure of any single software or hardware component within the system.
field-replaceable unit (FRU). (1) Any system component that can be serviced by customer
or system engineers trained by HP. See also customer-replaceable unit (CRU). (2) A
unit that can be replaced in the field only by qualified personnel. FRUs that are not also
CRUs cannot be replaced by customers.