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Satellite based voice communication services today are typically provided by communication centers interconnecting ground based communication facilities with suitably equipped aircrafts. These communication services are either based on a radio operator relaying the radio calls or by connecting the call automatically to phone lines through a telephone gateway. Calls from ground parties to aircraft typically use telephone numbers on a private telephone network in order to reach the appropriate air-to-ground relay station, which in turn patches the call into the radio call to the aircraft, or via a dispatcher in a communication center.

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