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The 2600hz Project BY Eugene Liu August 10, 2010 Remember the good ol’ days when you could build (or buy) a blue box to make free longdistance phone calls? The blue box generates the 2600 Hz tone which instructs the ol
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Document Date: 2014-05-27 07:48:08
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The 2600hz Project BY Eugene Liu August 10, 2010 Remember the good ol’ days when you could build (or buy) a blue box to make free longdistance phone calls? The blue box generates the 2600 Hz tone which instructs the ol