9-1
9. SYSTEM
DESCRIPTION
Inmarsat Fleet F55
The Inmarsat Fleet F55 system provides 4.8 kbps voice communications service
and 64 kbps data transmissions to and from mobile/fixed subscribers anywhere
within the worldwide coverage of the Inmarsat 3 spot Beam system,
see
“Satellite Coverage Map”
on page 3-4.
The benefit of the INMARSAT system is its high capacity, and the rapid and
reliable connection between the land based (fixed) users and the
Mobile Earth
Stations (MESs)
.
Each satellite region is under the control of a
Network Coordinating Station
(NCS)
, which controls and monitors the traffic between the MESs and the LESs.
NCS:
Network Coordinating Station, one in each Ocean Region (supervises all
messages and signals sent in the Inmarsat system).
LES:
Land Earth Station w/Net service providers interconnects fixed
telecommunication networks with the Inmarsat system.
MES:
Mobile Earth Station (FELCOM 50, user terminal for the Inmarsat system).
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LES
TELEPHONE
NETWORKS
DATA
NETWORKS
NCS
MES
Overview of the Inmarsat system.
Содержание Felcom 50
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