Kleinfelder Selects AT&T to Upgrade Its Network Technology

San Diego, California, April 19, 2007

AT&T Inc. (NYSE: T) announced today that Kleinfelder Inc. has signed a new networking agreement with AT&T for a three-year, $2.2 million contract. Under the terms of the agreement, AT&T will provide Kleinfelder with a new MPLS-enabled Virtual Private Network (VPN) and AT&T Virtual Private Network Tunneling Service (AVTS), which will provide consistent network services to company locations, as well as reliable redundancy.

Kleinfelder is a leading professional services firm in natural and built environments for municipalities, government agencies, multinational companies and industrial concerns across the nation, providing planning, engineering, scientific, technical and management solutions.

Kleinfelder approached AT&T because its needs exceeded the capabilities of its self-hosted data center in Sacramento and it was planning a move into a new data center. Kleinfelder required new network services that would meet its needs today and in the future. The company's original network technologies were scattered among Frame Relay, dedicated private line and MPLS, with limited redundancy.

AT&T proposed the AT&T VPN with automatic failover to AVTS in the event of a failure. The AT&T VPN will meet the customer's applications and videoconferencing needs today, as well as potential future needs, including Voice over IP. Additionally, Kleinfelder has delay-sensitive, mission-critical business applications that benefit from AT&T's VPN Class of Service option. The VPN also provides Kleinfelder with reliable videoconferencing transport between locations.

AT&T's AVTS solution provides low-cost network redundancy and allows for primary connectivity between smaller offices and the customer's data center.

"With the new network upgrade, AT&T is helping us to service our company's current and future needs and enabling us to react to unique data intensive challenges brought by our clients," said Ed Rothenbaum, Internet technology director at Kleinfelder. "The AT&T VPN solution provides Kleinfelder reliable, guaranteed performance levels to our 53 locations that will help to prevent applications from timing out, provide quality videoconferencing capabilities and allow for future Voice over IP deployment."

The agreement renews and expands a relationship between the two companies spanning nearly four years.

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About Kleinfelder
Kleinfelder is a leading professional services firm in natural and built environments for municipalities, government agencies, multinational companies and industrial concerns across the nation. With a staff of nearly 2,000 Kleinfelder is one of the nation's largest employee-owned firms providing planning, engineering, scientific, technical and management solutions. Visit www.kleinfelder.com.

About AT&T
AT&T Inc. is a premier communications holding company. Its subsidiaries and affiliates, AT&T operating companies, are the providers of AT&T services in the United States and around the world. Among their offerings are the world's most advanced IP-based business communications services and the nation's leading wireless, high speed Internet access and voice services. In domestic markets, AT&T is known for the directory publishing and advertising sales leadership of its Yellow Pages and YELLOWPAGES.COM organizations, and the AT&T brand is licensed to innovators in such fields as communications equipment. As part of its three-screen integration strategy, AT&T is expanding its TV entertainment offerings. Additional information about AT&T Inc. and the products and services provided by AT&T subsidiaries and affiliates is available at www.att.com.

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