6760 ServerNet/DA Manual

Glossary
6760 ServerNet/DA Manual—424879-003
Glossary-31
fault tolerance
NonStop™ S-series server. The 3863 FESA installs directly into an existing Ethernet
port, and one FESA is supported in each system enclosure.
fault tolerance. The ability of an HP NonStop™ S-series system to continue processing
despite the failure of any single software or hardware component within the system.
feature-test macro. In C and C++ programs, a symbol that, if defined in a program’s source
code, includes specific other symbols from a header within that program’s source code
and makes those symbols visible.
feeder circuit. The circuit conductors installed between the facility’s main service entrance
and the power distribution panels (PDPs) that supply the branch circuits.
ferrule. A cylindrical end terminal sometimes used on resistors, cartridge fuses, and other
parts to permit quick insertion and removal from holders that have corresponding
spring contacts.
FESA. See Fast Ethernet ServerNet adapter (FESA).
Fiber Optic Extension (FOX). Refers to two products, FOX II and ServerNet/FX, which
allow you to create high-speed (up to 4 megabytes/second) networks of as many as 14
systems connected by dual fiber-optic cables.
fiber-optic plug-in card (F-PIC). A plug-in card (PIC) for the 6760 ServerNet device
adapter (ServerNet/DA) that uses a fiber-optic interface to connect an HP NonStop™
S-series system to external disk drives and to some tape drives that contain a
back-end board (BEB) that translates fiber-optic signals from the F-PIC into SCSI
commands and information for the tape drive. See also plug-in card (PIC)
and SCSI
plug-in card (S-PIC).
fiber optics. A medium for data transmission that conveys light or images through very fine,
flexible, glass or plastic fibers. Fiber-optic cables (light guides) are a direct replacement
for conventional coaxial and wire pairs.
fiber-optic ServerNet addressable controller (F-SAC). A ServerNet addressable
controller (SAC) that is contained within a fiber-optic plug-in card (F-PIC).
fiber-optic ServerNet cable. A ServerNet cable that uses fiber optics to transmit data. HP
NonStop™ S-series servers support two types of fiber-optic ServerNet cables:
multimode fiber-optic (MMF) ServerNet cable
and single-mode fiber-optic (SMF)
ServerNet cable.
field. In a structured programming language, an addressable entry within a data structure.
The term “field” is sometimes used to mean “member
.”
field-programmable gate array (FPGA). A programmable integrated circuit that can be
customized to perform specific functions.