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- Inmarsat
-
- Vast areas of the world are still beyond the reach of fixed and cellular
- telecommunication networks. These areas are either sparsely populated or
- too economically depressed to support conventional communications
- infrastructure. Inmarsat has been operating a global satellite system since
- 1982. Through a system of four satellites, Inmarsat provides a worldwide
- range of high quality telecommunications services that are easy to setup
- and operate and for a fraction of the cost of conventional systems.
-
- Access to the system is provided through satellite communication terminals
- like the mobilfone, Compact-M, or Worldphone. When a call is made, the
- terminal directs a signal to one of the four satellites which in turn
- redirects the signal back to an Inmarsat receiving station on earth called
- a Land Earth Station (LES). The signal is then routed through the Public
- Switched Telephone Network to complete the call.
-
- To reach another Inmarsat terminal, the LES would redirect the signal back
- to one of the four satellites corresponding to the other terminal's
- location which in turn redirects it down to the other terminal to complete
- the call. The same basic process is used to transmit fax and data
- information as well.
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