AT&T Extends Relationship with Underwriters Laboratories, Wins Asia Pacific Networking Contract

Northbrook, Illinois, November 20, 2006

AT&T Inc. (NYSE: T) today announced that AT&T has extended its relationship with Underwriters Laboratories Inc. (UL), a leader in product-safety testing and certification, for another three years. The new agreement includes all existing networking services in the U.S., Canada, Latin America and EMEA along with new networking services in Asia.

The agreement builds upon an existing relationship in which AT&T provides a comprehensive portfolio of long distance voice and data services.

AT&T will continue to provide an Internet Protocol Virtual Private Network (IP VPN) solution that serves as UL's primary data network — integrating UL's Northbrook headquarters with 50 locations worldwide and providing fast and secure online access to the organization's mission-critical business applications, including human resources, payroll, and financial and operational functions.

The AT&T solution supports UL's customer service management applications, helping customers understand the product submittal process, providing assistance as manufacturers work with UL on testing and certification projects and enabling the organizations customer service professionals to respond to requests coming from UL's Web site.

In addition, AT&T will provide a backup network that supports applications, such as e-mail and Web-browsing. Connectivity between the primary and secondary networks enhances UL's business-continuity capabilities by providing automatic routing of traffic from one network to the other to offering uninterrupted access to its critical applications.

"Extending our conformity-assessment services to help companies achieve global acceptance for their products is what's driving the future success of our organization," said Mark Sklenar, UL senior vice president and chief information officer. "AT&T's global networking capabilities make it a natural choice for us to work with, as we continue to expand our presence in major world markets."

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About Underwriters Laboratories Inc.
Underwriters Laboratories Inc. (UL) is an independent, not-for-profit product safety certification organization that has been testing products and writing Standards for Safety for more than 110 years. UL tests more than 19,000 types of products annually, and more then 20 billion UL Marks appear on products each year. Worldwide, UL's family of companies and its network of service providers include 62 laboratories, and testing and certification facilities.

About AT&T
AT&T Inc. is one of the world's largest telecommunications holding companies and is the largest in the United States. Operating globally under the AT&T brand, AT&T companies are recognized as the leading worldwide providers of IP-based communications services to business and as leading U.S. providers of high speed DSL Internet, local and long distance voice, and directory publishing and advertising services. AT&T Inc. holds a 60 percent ownership interest in Cingular Wireless, which is the No. 1 U.S. wireless services provider with 58.7 million wireless customers. Additional information about AT&T Inc. and AT&T products and services is available at http://www.att.com.

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