
ArcLight Hub User’s Guide
xx 1081006
Rev.
001
IDU
Indoor unit
Hardware installed within a building
enclosure.
IFL
Inter-facility link
A communications link between facilities.
IP
Internet protocol
A unique address that devices use to
identify and communicate with each other
on a computer network utilizing the
Internet Protocol standard.
KVM switch
A rack-mounted Avocet switch
An ArcLight module that runs Avocet
software.
LAN
Local area network
A computer network covering a local area,
like a home, office, or group of buildings.
LNB
Low noise block converter
Used in communications satellite
reception. The LNB is usually fixed on or
in the satellite dish.
LO
Local oscillator
A device used to generate a signal which
is beat against the signal of interest to mix
it to a different frequency.
MAC
Machine address code
An address directly understandable by a
computer's central processing unit.
M&C
Monitor and control
A process to monitor and control the
VMTs of a satellite network.
MCD
Multi-channel demodulator
Uses a monitor and control card running
VxWorks OS and ViaSat application
software, and a WAM card with no OS,
CDC and UC software.
MDLP Management
download
protocol
A
process to manage downloads between
the Hub and its VMTs.
MDLS
Management download server
An ArcLight server dedicated to managing
download traffic.
MF-TDMA
Multi-frequency time division
A multi-frequency channel access method
multiple-access
for shared medium (usually radio)
networks.
MHz
Mega-Hertz
(10
6
)
Unit of measure, millions of Hertz.
MSPS
Mega symbols per second
The number of symbols (in millions) that
can be transmitted in a second.
Monitor Server
IBM class machine with
A server that emulates a remote VMT.
Windows
2000
OS
NAS
Network attached storage
Dedicated data storage technology that
can be connected directly to a computer
network to provide centralized data access
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