A red box is a phreaking device that generates tones to simulate inserting coins in pay phones, thus fooling the system into completing free calls. In the United States, a nickel is represented by one tone, a dime by two, and a quarter by a set of 5 tones. Any device capable of playing back recorded sounds can potentially be used as a red box. Commonly used devices include modified Radio Shack tone dialers, personal MP3 players, and audio-recording greeting cards.
Famous quotes containing the words red and/or box:
“The dancers crowded about him
And many a sweet thing said,
And a young man brought him red wine
And a young girl white bread.”
—William Butler Yeats (1865–1939)
“Angel of hope and calendars, do you know despair?
That hole I crawl into with a box of Kleenex....”
—Anne Sexton (1928–1974)