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AT&T Inc. (AT&T) is a provider of telecommunications services in the United States. It offers its services and products to consumers in the United States, and services and products to businesses and other providers of telecommunications services worldwide. The services and products that it offers vary by market, and include wireless communications, local exchange services, long-distance services, data/broadband and Internet services, video services, telecommunications equipment, managed networking, wholesale services and directory advertising and publishing. Its traditional wireline local exchange subsidiaries operate in 22 states: Alabama, Arkansas, California, Connecticut, Illinois, Indiana, Florida, Georgia, Kentucky, Louisiana, Kansas, Michigan, Mississippi, Missouri, Nevada, North Carolina, Ohio, Oklahoma, South Carolina, Tennessee, Texas and Wisconsin (22-state area). In March 2008, Black Box Corporation acquired AT&T's NEC TDM voice CPE business line in AT&T's southeast region.