court effectively ended AT&T's telephone monopoly, forcing the giant to spin off its regional subsidiaries. AT&T continued to hold a substantial share of the long-distance telephone business, but vigorous competitors such as MCI Communications and Sprint Communications won some of the business, showing in the process that competition could bring lower prices and improved service. A decade later, pressure grew to break up the Baby Bells' monopoly over local telephone service. New technologies -- including cable television, cellular (or wireless) service, the Internet, and possibly others -- offered alternatives to local telephone companies. But economists said the enormous power of the regional monopolies inhibited the development of these alternatives. In particular, they said, competitors would have no chance of surviving unless they could connect, at least temporarily, to the established companies' networks -- something the Baby Bells resisted in numerous ways. In 1996, Congress responded by passing the Telecommunications Act of 1996. The law allowed long-distance telephone companies such as AT&T, as well as cable television and other start-up companies, to begin entering the local telephone business. It said the regional monopolies had to allow new competitors to link with their networks. To encourage the regional firms to welcome competition, the law said they could enter the long-distance business once new competition was established in their domains. At the end of the 1990s, it was still too early to assess the impact of the new law. There were some positive signs. Numerous smaller companies had begun offering local telephone service, especially in urban areas where they could reach large numbers of customers at low cost. The number of cellular telephone subscribers soared. Countless Internet service providers sprung up to link households to the Internet. But there also were developments that Congress had not anticipated or intended. A great number of telephone companies merged, and the Baby Bells mounted numerous barriers to thwart competition. The regional firms, accordingly, were slow to expand into long-distance service. 77