SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-X and HSD-Xi High-speed Data Terminal
23-15-30
1-1
8 MAY 09
SYSTEM DESCRIPTION
This section includes basic information about the HSD-Xi terminal, and includes the following
sections:
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HSD-Xi Terminal System Interfaces
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1.
Inmarsat System Overview
The satellite communication system includes global satellite networks, LESs, and Mobile Earth
Stations (MESs).
The LES is the part of the satellite communication system that is on the ground. These
numerous, international stations are responsible for routing voice and data calls from the MES
to their destinations around the world.
The MES is the part of the satellite communication system that is on the aircraft. This station
includes the following components:
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HSD terminal
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Antenna subsystem
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Cabin communications system
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Analog connected telephones
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Cockpit voice system
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Other aircraft avionics
Figure 1-1 illustrates a simplified satellite communications system.
