Blue Box Jesse Russell

ISBN: 9785512240267

Published: January 22nd 2012

Paperback

110 pages


Description

Blue Box  by  Jesse Russell

Blue Box by Jesse Russell
January 22nd 2012 | Paperback | PDF, EPUB, FB2, DjVu, talking book, mp3, RTF | 110 pages | ISBN: 9785512240267 | 3.20 Mb

High Quality Content by WIKIPEDIA articles! An early phreaking tool, the blue box is an electronic device that simulates a telephone operators dialing console. It functioned by replicating the tones used to switch long-distance calls and using themMoreHigh Quality Content by WIKIPEDIA articles! An early phreaking tool, the blue box is an electronic device that simulates a telephone operators dialing console. It functioned by replicating the tones used to switch long-distance calls and using them to route the users own call, bypassing the normal switching mechanism.

The most typical use of a blue box was to place free telephone calls - inversely, the Black Box enabled one to receive calls which were free to the caller. The blue box no longer works in most western nations, as modern switching systems are now digital and no longer use the in-band signaling which the blue box emulates. Instead, signaling occurs on an out-of-band channel which cannot be accessed from the line the caller is using (called Common Channel Interoffice Signaling (CCIS)).



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