Automatic telephone call recording circuit


Posted on Dec 11, 2010    7685

DC voltage present on the telephone line is usually about 45 to 50V, on-hook and off-hook to 6V. The step-down circuit relay is activated. Relay control tape recorder. Audio is


Automatic telephone call recording circuit
Click here to download the full size of the above Circuit.

input through the network to tape the microphone.




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