NonStop NS-Series Planning Guide (H06.03+)

Glossary
HP Integrity NonStop NS-Series Planning Guide—529567-004
Glossary-4
fiber-optics
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.
frequency. The number of complete cycles/second of sinusoidal variation. For alternating-
current (AC) power lines, the most common frequencies are 60 hertz and 50 hertz.
Global Customer Support Center (GCSC). A support organization that provides telephone
and remote diagnostic support for HP customers. GCSCs are located all over the
world. See also Online Support Center (OSC).
ground. A conducting connection, whether intentional or accidental, between an electrical
circuit and either the earth or some conducting body that serves in place of the earth,
such as an underground metal water pipe, structural steel, or a ground rod driven into
the earth. See also earth ground.
grounded. Connected to earth or to some conducting body that serves in place of the earth.
grounded conductor. A system or circuit conductor that is intentionally grounded.
harmonic. The sinusoidal component of an alternating-current (AC) voltage that is a
multiple of the waveform frequency.
harmonic distortion. Harmonics that change an alternating-current (AC) waveform from
sinusoidal to complex.
hertz (Hz). A unit of frequency. One hertz equals one cycle/second.
high frequency. A Federal Communications Commission (FCC) designation for a
frequency in the range 30 through 300 megahertz, corresponding to a decametric
wave in the range 10 through 100 meters.
HP NonStop™ S-series servers. The HP NonStop servers having product numbers
beginning with the letter S. These servers implement the ServerNet architecture and
run the HP NonStop operating system.
HP NonStop™ servers. The entire line of HP NonStop servers, including NonStop
NS-series and NonStop S-series servers.
HP NonStop™ Technical Library (NTL). The application for accessing, searching, and
viewing technical publications and support information for the HP NonStop server. NTL
replaces Total Information Manager (TIM).
Hz. See hertz (Hz).
IEC. International Electrotechnical Committee. IEC is a professional organization that
creates or adopts standards for computer hardware, environments, and physical
interconnections.