System for the payment of telephone calls in a private self-swit

Details System for the payment of telephone calls in a private self-swit System for the payment of telephone calls in a private self-swit

1989-04-11

1991-03-26

Schreyer, Stafford D.

Telephonic communications

With check operated control

Other than coin

379155, H04M 166, H04M 1516, H04M 1700

Patent

active

050035851

ABSTRACT:
A telephone system uses a badge which contains electronically stored data including information about pre-paid credits. When a call is made, data is read from and into the badge to leave a credit balance standing in the badge after the charges for a call have been deducted.

REFERENCES:
patent: 3870866 (1975-03-01), Halpern
patent: 4045619 (1977-08-01), Harrington

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