Pre-paid cellular telephone system

Details Pre-paid cellular telephone system Pre-paid cellular telephone system

1996-08-15

2000-08-08

Bost, Dwayne D.

Telecommunications

Radiotelephone system

Usage measurement

455410, 455405, 455407, H04Q 720, H04M 1100

Patent

active

061013781

ABSTRACT:
A cellular telephone system maintains a database of prepaid cellular telephone service accounts, including an amount of money remaining in each account. The system uses modems in a blank-and-burst mode to send data and commands over a voice channel. When a call is attempted over a mobile unit, the system sends identification information stored in the mobile unit to a debit processing unit, which then permits the call and debits the associated account if a sufficient amount of money remains in the account, otherwise it terminates the call.

REFERENCES:
patent: 5376931 (1994-12-01), Marrs
patent: 5485486 (1996-01-01), Gilhousen et al.
patent: 5577100 (1996-11-01), McGregor et al.
patent: 5592535 (1997-01-01), Klotz
patent: 5682602 (1997-10-01), Walker et al.
patent: 5722067 (1998-02-01), Fougnies et al.
patent: 5748720 (1998-05-01), Loder

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