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Coin operated telephone auditor

  • US 6,052,453 A
  • Filed: 07/31/1998
  • Issued: 04/18/2000
  • Est. Priority Date: 07/29/1996
  • Status: Expired due to Fees
First Claim
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1. A loop length indicator circuit incorporated within a coin operated telephone for indicating that less than a minimum loop current is available, comprising:

  • monitor means for measuring power conditions and for providing a first signal indicative of the power available from the central office;

    control means connected to the monitor means for processing the first signal and generating a second signal if inadequate power is available; and

    indicator means connected to the control means for providing an alerting indication to service personnel at the payphone if the second sign is generated.

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