8 Oo Numbers: No Longer At&T's Private Line

In May, rivals will get a better shot at the toll-free business

Since the 1984 breakup of American Telephone & Telegraph Co., the phone giant has been bloodied by rivals in virtually every segment of the long-distance marketplace, save one: the lucrative, toll-free "800" service. "This is one of the last big pieces of AT&T's monopoly," says Berge A. Ayvazian, a senior vice-president at Yankee Group Inc., a Boston market-research firm.

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