Digital coin circuit

Details Digital coin circuit Digital coin circuit

H - Electricity

04

J

363/12, 344/25,

H04J 3/12 (2006.01) H04M 17/02 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 1124418

ABSTRACT OF THE DISCLOSURE A circuit which allows a digital network telephone central office to provide coin telephone service without analog-to-digital converters. This circuit controls the transmission of digital data representative of coin tele- phone control signals. Shift registers are used to store this data for asynchronous transmission to a coin telephone, under control of gating logic circuits which insert one bit periodically in preselected frames of data sent to a coin telephone.

313690

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