Land Earth Stations (Les) - EMS HSD series User Manual

Land Earth Stations (LES)

Inmarsat Service Providers (ISPs) operate Land Earth
Stations (LES). The ISPs are typically public telephone
companies of the country where the LES is located.
Using satellite communications antenna and up-and-
downlink communications equipment, the LES converts the
space segment to a format compatible with public and
private telephone and data networks.
Each satellite is associated with a number of Land Earth
Stations that fall within its coverage.
Mobile Earth Stations (MES)
The Mobile Earth Station (MES) provides ISDN service
over the Satellite network similar to the ISDN services
installed by telecommunications companies for land-based
data communication.
The HSD Aeronautical Transceiver acts as a Mobile Earth
Station providing the connection to the Inmarsat Swift64
service.
Figure 2 shows the basic connection between the MES,
Satellite, LES, and land network connections.
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Copyright © EMS Technologies Canada, Ltd.
User's Guide EMS-MN-1110-10048
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