Glossary
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I
IFL
Inter-Facility Link
IMSO
International Mobile Satellite Organisation. An intergovernmental organisation that
oversees certain public satellite safety and security communication services provided via
the Inmarsat satellites.
IP
Ingress Protection. An international classification system for the sealing effectiveness of
enclosures of electrical equipment against the intrusion into the equipment of foreign
bodies (i.e. tools, dust, fingers) and moisture. This classification system uses the letters "IP"
followed by two or three digits. An "x" is used for one of the digits if there is only one class
of protection; e.g. IPX4 which addresses moisture resistance only.
IP
Internet Protocol. The method or protocol by which data is sent from one computer to
another on the Internet.
K
KDM
Keyboard and Display Module of the ACU
L
LAN
Local Area Network
LED
Light Emitting Diode
LNB
Low Noise Blockdown Converter. A device used to amplify or boost the weak received
signal without amplifying the noise signals (hence the “low noise” part of LNB) and to
convert the high frequencies of the signal into lower frequencies, a process called down
converting, for conveyance to the indoor equipment (demodulator) for processing.
M
MDM
Modem
MIB
Management Information Base. A Formal description of a set of network objects that can
be managed using the Simple Network Management Protocol (SNMP).
O
ODU
OutDoor Unit. Another word for antenna.
OID
Object Identifier, in the context of the Simple Network Management Protocol (SNMP),
consists of the object identifier for an object in a Management Information Base (MIB).
P
PAST
Person Activated Self Test
PC
Personal Computer
POST
Power On Self Test. A system test that is activated each time the system is powered on.
R
RF
Radio Frequency. Electromagnetic wave frequencies between about 3 kHz and about 300
GHz including the frequencies used for communications signals (radio, television, cell-
phone and satellite transmissions) or radar signals.
