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Using VoIP to Compete

Since Alexander Graham Bell’s day, businesses have bought telephone services the same way they’ve purchased electricity, janitorial functions, and water for the cooler—as packaged offerings defined by an outside provider. Sure, companies could choose from a menu of configuration options and service plans, but, in the end, the phone company or vendor called the shots. The breakup of telephone monopolies such as AT&T in the 1980s changed the mix of providers, but it left intact the century-old public-switched telephone network they employ, and it left service decisions up to suppliers. As a result, companies have been constrained—more than they know—by the legacy phone systems they’ve depended on.

A version of this article appeared in the September 2005 issue of Harvard Business Review.

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