Sonet or SDH Demystified

Аннотация

Although the best-known impact of divestiture was the breakup of AT&T (one result of which was the liberalization of the telecommunications marketplace in the U.S.), a second decision that was tightly intertwined with the Bell System’s breakup was largely invisible to the public, yet was at least as important to AT&T competitors, MCI and Sprint, as the breakup itself. This decision, known as Equal Access, had one seminal goal: to make it possible for end customers to take advantage of one of the products of divestiture, the ability to select one’s long-distance provider from a pool of available service providers—in this case AT&T, MCI, or Sprint.