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Red Box

Posted: September 27th, 2009 Author: Jolly Roger

Red boxing is simulating the tones produced by public payphones when you drop your money in. The tones are beeps of 2200 Hz + 1700 Hz Nickle = 1 beep for 66 milliseconds.

Dime = 2 beeps, each 66 milliseconds with a 66 millisecond pause between beeps.
Quarter = 5 beeps, each 33 milliseconds with a 33 millisecond pause between beeps. There are two commonly used methods being used by Phreaks to make free calls.

1. An electronic hand-held device that is made from a pair of Wien-bridge oscillators with the timing controlled by 555 timing chips.
2. A tape recording of the tones produced by a home computer.

One of the best computers to use would be an Atari ST. It is one of the easier computers to use because the red box tones can be produced in basic with only about 5 statments.

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