AT&T is the incumbent carrier in 22 states, a competitive access provider across 100+ metros with hundreds of POPs and a nationwide next-generation switched optical mesh network. AT&T has it all in SONET: reach, flexibility and diversity. This report contains insight and analysis of the product or service strengths and weaknesses, list of buying criteria and how the product or service fares in each category, and a comprehensive table of product or service metrics and specifications. This report is useful for purchasers who need to evaluate products, or as a source of competitive intelligence for vendors.