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Low power control apparatus for a coin operated telephone

  • US 4,926,458 A
  • Filed: 05/26/1988
  • Issued: 05/15/1990
  • Est. Priority Date: 05/26/1988
  • Status: Expired due to Fees
First Claim
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1. A low power, coin operated telephone controller for controlling a coin operated telephone which has an on-hook state and an off-hook state, said controller being energized with power from tip and ring lines of a loop circuit from a central office during said telephone'"'"'s off-hook state, said controller having:

  • a standby mode during said telephone'"'"'s on-hook state in which substantially no power is drawn by said controller from the tip and ring lines of the loop circuit;

    an audio network;

    a totalizer control means for signalling of accepted coin value to the central office;

    an electric coin mechanism for electronically testing coins and for generating coin data in the form of electrical signals for each coin deposited into said telephone;

    a power supply circuit having a plurality of outputs and which is energized with power from said tip and ring lines of the loop circuit for energizing said telephone controller during said telephone'"'"'s off-hook state;

    interface circuitry for set up of status indicators and for monitoring telephone conditions during periods when no current is available between the tip and ring lines; and

    a single processing element comprising timing means for establishing times or durations of events or calls, and nonvolatile digital memory for storing a plurality of bits of data during both the off-hook state and on-hook state of the coin operated telephone, for processing said coin data and controlling the electronic coin mechanism, and for controlling operation of said audio network, said interface circuitry and said power supply circuit.

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