Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1995-05-02
1997-07-22
Cumming, William
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
H04Q 738
Patent
active
056510500
ABSTRACT:
A ground-to-air telephone calling system is provided including a computer for receiving an airborne telephone number and a call-back number from a calling party and forming the telephone numbers into a data signal comporting with existing protocol filed in the FCC, an uplink unit for uplinking the data signal to a satellite and a plurality of downlink stations for receiving the data signal from the satellite; a plurality of ground stations corresponding to each of the downlink units for receiving the data signals and passing a call signal identifying the airborne telephone and particular ground station to a corresponding transmit/receive unit for subsequent transmission to the aircraft; a call being initiated from the ground station to the calling party over the public switched telephone network if the aircraft responds to the call signal. An alternative embodiment provides for a plurality of telephones on board the aircraft, and is capable of directing a call from a ground based caller to a particular telephone assigned to a passenger on the aircraft.
REFERENCES:
patent: 4835604 (1989-05-01), Kondo et al.
patent: 4866515 (1989-09-01), Tagawa et al.
patent: 4903298 (1990-02-01), Cline
patent: 5278891 (1994-01-01), Bhagat et al.
patent: 5408515 (1995-04-01), Bhagat et al.
patent: 5438610 (1995-08-01), Bhagat et al.
Ambit System, Incorporated, "Airborne Telecommunications Ssystem Description" Jul. 1991.
Bhagat Jai P.
Hays William D.
Oswalt Ernest A.
Cumming William
Mobile Telecommunication Technologies
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