Simplified Anti Toll Fraud Circuit Diagram

Published:2011/9/7 0:43:00 Author:Vicky | Keyword: Simplified Anti Toll Fraud Circuit | From:SeekIC

Simplified anti toll fraud circuit is shown in the above picture. The picture is a simplified anti toll fraud circuit. When the telephone is made normally, the indication light is luminous. When anyone wiretaps and makes calls, the circuit will give out fierce alarming sound which prevents the telephone from regular usage. The input lines of the circuit can be divided into positive and negative. The output lines can be connected with the telephone arbitrarily.



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