Red Boxing With Whistles=20


This article is presented as a news item only. It is not to be taken as =
an
encouragement to make fraudulent telephone calls.

Red boxing consists of simulating the tones produced when coins are =
deposited
in a pay phone. Coin tones are beeps of 2200 Hz + 1700 Hz as follows:

5 cents - 1 beep, 66 milliseconds duration.

10 cents - 2 beeps, each 66 milliseconds duration with 66
millisecond pause between beeps.

25 cents - 5 beeps, each 33 milliseconds duration with a 33
millisecond pause between beeps.

Two methods have commonly been used by phone phreaks to produce these =
tones
and make free calls.

1. The traditional Red Box consisting of a pair of Wien-bridge =
oscillators
with the timing controlled by 555 timer chips.

2. Producing the signals with a computer which are recorded and then
played back into the mouth piece of a pay phone.

A third method has recently appeared which is a real mind blower. A =
phreak
in the Midwest has extensively tested a method of red boxing which uses =
nothing
more than a pair of brass or aluminum whistles. The whistles are 1/4 =
inch in
diameter by 4 inches long and are tuned by means of a wooden dowel rod =
which
fits snugly inside. The whistles can be brought precisely on frequency =
by
tuning them against a known signal source such as a computer capable of
producing the tones. Once tuned, the whistles are glued or taped =
together so
they can be blown together to produce the dual tone used in coin =
signaling.
It has been tested and proven that with a little practice these whistles =
can be
used to make free calls. Now you can blow your money without spending a =
cent.



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