There is an underground telephone network in this country. Al Gilbertson, creator of the "blue box", discovered it the very day news of his own arrest hit the papers. That evening his phone began ringing. Phone phreaks from Seattle, from Florida, from New York, from San Jose, and from Los Angeles began calling him and telling him about the phone-phreak network. He'd get a call from a phone phreak who'd say nothing but, "Hang up and call this number"...