1976-06-02
1978-02-14
Claffy, Kathleen H.
179 15R, H04M 1700
Patent
active
040740790
ABSTRACT:
This invention relates to coin-operated telephones and apparatus for preventing the accidental or fraudulent simulation of coin deposit signals. At the beginning of each coin call or overtime period, a coding algorithm is randomly chosen at the coin station and the identity of the chosen algorithm is transmitted over the telephone line to a receiving telephone office. For each coin deposited, the coin station generates accumulated coin deposit information, codes it in accordance with the chosen algorithm and then transmits the coded accumulated deposit information to the telephone office. The office decodes the received information in accordance with the chosen algorithm identity information previously received at the telephone office to ascertain the amount deposited at the coin station.
REFERENCES:
patent: 3012100 (1961-12-01), Mitchell
patent: 3428751 (1969-02-01), Edington
patent: 3624297 (1971-11-01), Chapman
patent: 3696207 (1972-10-01), Lundin et al.
patent: 3760104 (1973-09-01), Thompson et al.
patent: 3886313 (1975-05-01), Branscome et al.
patent: 3952160 (1976-04-01), Pasternack et al.
patent: 3953677 (1976-04-01), Gannett
patent: 3991271 (1976-11-01), Branscome et al.
"Is Automatic Long Distance Coin Calling Possible?" Telephone pp. 75-78, Jan. 21, 1974.
"Automization of Coin Toll Calls and Upgrading the Coin Telephone Service of Single Slot Paystations" Jour. of Nat. Telecommunication Conference Nov. 26, 1973, pp. 10D-1-10D-4.
Prell Edward M.
Rogers Barry W.
Bell Telephone Laboratories Incorporated
Brigance Gerald L.
Claffy Kathleen H.
Landis Martin S.
Samples Kenneth H.
LandOfFree
Coin telephone antifraud system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coin telephone antifraud system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coin telephone antifraud system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-526023