The breakup of the Bell System was mandated on January 8, 1982 by an agreed consent decree providing that AT&T Corporation would, as had been initially proposed by AT&T, relinquish control of the Bell Operating Companies that had provided local telephone service in the United States and Canada up until that point. This effectively took the monopoly that was the Bell System and split it into entirely separate companies that would continue to provide telephone service. AT&T would continue to be a provider of long-distance service, while the now-independent Regional Bell Operating Companies (RBOCs) would provide local service, and would no longer be directly supplied with equipment from AT&T subsidiary Western Electric.
This divestiture was initiated by the filing in 1974 by the United States Department of Justice of an antitrust lawsuit against AT&T. AT&T was, at the time, the sole provider of telephone service throughout most of the United States. Furthermore, most telephonic equipment in the United States was produced by its subsidiary, Western Electric. This vertical integration led AT&T to have almost total...
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