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User’s Guide EMS-MN-1110-10048
83
Glossary
bit rate
The number of bits transmitted per
second (bps).
INMARSAT
The international organization that
operates the satellite system
network.
Inmarsat Mobile Number
(IMN)
Assigned by Inmarsat, these
numbers act as ‘aircraft telephone
numbers’.
ISDN
Integrated Service Digital Network
is a telecommunications technology
that provides high-speed data
transfer over a range of
communication services: Internet,
fax, voice, and data.
Land Earth Station (LES)
Land Earth Stations are operated by
Inmarsat Service Providers. They
provide the connection between the
orbiting satellites and the
international ground
communications network.
Mobile Earth Station
(MES)
The mobile terminal that
provides the communication link
between the aircraft and the
satellite network. The HSD
Transceiver acts as a Mobile
Earth Station.
Ocean Region
The beam coverage area of an
Inmarsat satellite.
subnet mask
A subnet mask is used to determine
what subnet an IP address belongs
to. Subnetting allows the network
administrator to divide the host part
of the address into two or more
subnets.
terminal adapter
An ISDN modem device.