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431 pages, Hardcover
First published February 5, 2013
Certain telephone exchanges in some areas of the country, notably Los Angeles and San Jose in California, had busy signals that were shared among all callers. An example was San Jose’s 291 exchange in the 408 area code. If you and I both happened to call busy numbers in 408-291 we would be connected, faintly, over the busy signal—along with anyone else who happened to have called a busy number at that moment. If we shouted we could hear each other. Of course, we’d be constantly annoyed by the baaa...baaa...baaa of the busy signal. And that busy signal was loud; our voices would be in the background to the busy signal in the foreground. “It was an insane way to try to communicate,” recalls Jim Fettgather…There are so many things to learn in this book, from the fundamentals of multifrequency harmonics to the advent of transistors and how they altered so many industries. You see modernity collapse the barrier of distance through communication technologies, and then watch as clever folks smash that magical infrastructure into even more amazing bits.
And FBI memo [indicated]: “As a source of income, the underground is manufacturing and selling ‘red boxes’ in large quantities. These boxes duplicate the tones generated by coins deposited in pay telephones. Through the use of ‘red boxes’ an individual is able to make long distance call[s] without depositing money. These boxes cost the underground $6 or $7 to manufacture and are currently retailing on the street at $100. All money obtained from the sale of red boxes is going towards purchase of technical equipment for further research.”Anyone with even the slightest interest in communications technology—or modern infrastructure; or the analogue-to-digital transition; or counter-culture; or regulatory history—should jump all over this book. And if you’ve never heard of “Ma Bell,” well, this is a wicked place to start learning.
Swell. Just swell. A shadowy underground organization made up of technical wizards—wizards who might have spies within the phone company—can monitor your calls from anywhere and who might, if they chose, sell the results to of their wiretapping to the highest bidder.