Security code selector for telephone access card

Details Security code selector for telephone access card Security code selector for telephone access card

1995-06-14

1997-06-03

Zele, Krista M.

Telephonic communications

Supervisory or control line signaling

Substation originated

379354, 379357, 379145, H04M 100

Patent

active

056362714

ABSTRACT:
A card for tonal entry of PIN codes into a telephone is provided. The keys of a key entry device are contacted in a proscribed sequence to enter a number into the card with each use of the card. The keyed in number is compared with a number stored in the card. If the numbers are the same, an acknowledgement tone is sent. Upon obtaining of the acknowledgement tone, the annunciator in the card is held to the telephone mouthpiece and activated by the user to produce a tonal representation of the PIN number. If an improper number sequence is keyed in by the user, the card produces a warning signal requiring reentry of a number. After three or four successive failures of the user to enter the correct number, the card is disabled and a new one has to be obtained by the cardholder.

REFERENCES:
patent: 5181238 (1993-01-01), Medamana
patent: 5181744 (1993-01-01), Betheil
patent: 5343519 (1994-08-01), Feldman
patent: 5365046 (1994-11-01), Haymann
patent: 5377263 (1994-12-01), Bazemore
patent: 5511114 (1996-04-01), Stimson et al.

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