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DTF

For Whom the Fraud Tolls

Fraud cartoon
Telephone fraud has been going on for a long time. It became prevalent in the 1960s, when DTMF (Dual-Tone Multiple Frequency) dialing was being introduced to replace pulse dialing from then-current rotary phones. Crafty individuals educated themselves and fabricated handheld red, black, and blue boxes that could generate the necessary tones to alter the target phone system's behavior. Soon ...
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