42 lines
1.8 KiB
Plaintext
42 lines
1.8 KiB
Plaintext
Red Boxing With Whistles by THE
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RESEARCHER
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This article is presented as a news item only. It is not to be taken as an
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encouragement to make fraudulent telephone calls.
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Red boxing consists of simulating the tones produced when coins are deposited
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in a pay phone. Coin tones are beeps of 2200 Hz + 1700 Hz as follows:
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5 cents - 1 beep, 66 milliseconds duration.
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10 cents - 2 beeps, each 66 milliseconds duration with 66
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millisecond pause between beeps.
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25 cents - 5 beeps, each 33 milliseconds duration with a 33
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millisecond pause between beeps.
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Two methods have commonly been used by phone phreaks to produce these tones
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and make free calls.
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1. The traditional Red Box consisting of a pair of Wien-bridge oscillators
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with the timing controlled by 555 timer chips.
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2. Producing the signals with a computer which are recorded and then
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played back into the mouth piece of a pay phone.
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A third method has recently appeared which is a real mind blower. A phreak
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in the Midwest has extensively tested a method of red boxing which uses nothing
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more than a pair of brass or aluminum whistles. The whistles are 1/4 inch in
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diameter by 4 inches long and are tuned by means of a wooden dowel rod which
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fits snugly inside. The whistles can be brought precisely on frequency by
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tuning them against a known signal source such as a computer capable of
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producing the tones. Once tuned, the whistles are glued or taped together so
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they can be blown together to produce the dual tone used in coin signaling.
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It has been tested and proven that with a little practice these whistles can be
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used to make free calls. Now you can blow your money without spending a
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cent.
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Please note these whistles are available (for test purposes only) from
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P-80 $35 send orders to P-80 3310 5th Avenue Charleston, WV. 253
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