Harmonic NSG 9116 Hardware Installation page 78

70 Ethernet
E
Ethernet
A data link (physical interface) developed
for local area networks (LANs) that supports
transmission rates up to 10 Mbps. Fast
Ethernet supports transmission rates up to
100 Mbps.
G
GbE
Gigabit Ethernet. A transmission technology,
based on the Ethernet frame format and
protocol used in local area networks, that
provides a data rate of 1 billion bits per
second.
H
headend
The distribution point in a TV system.
Hertz
A unit of frequency defined as one cycle
per second. Abbreviated Hz.
Hz
See Hertz.
I
I/O
input/output. Refers to a connection that
inputs and outputs data.
INA
Works as an arbitrator for IP
communications over RF networks. It is
based on the DVB standard. See
also CMTS.
IP address
An identifier for a computer or device on an
Internet Protocol (IP) network. Networks
using IP route messages based on the IP
address of the destination. An IP address is
a 32-bit number written in dotted decimal
notation: four 8-bit sections, separated by
periods, converted from binary to decimal.
Each section is a number from zero to 255.
L
LC
A high-density optical connector used for
single-mode and multimode fiber-optic
applications.
M
MPEG
Moving Picture Experts Group. A joint
working group of the International
Standards Organization and International
Electrotechnical Committee.
multimode fiber
Optical fiber designed to carry multiple light
rays or modes concurrently, each at a
slightly different reflection angle within the
optical fiber core. Multimode fiber
transmission is used for relatively short
distances because the modes tend to
disperse over longer lengths For longer
distances, singlemode fiber is used.
multiplex
The ability to combine multiple signals over
a single communications line or channel.
multiplexer
A function where multiple signals are
combined into a single signal. A device that
merges several lower-speed transmissions
into one high-speed transmission, and vice
versa.
O
OS
operating system.
Glossary