AT&T Wins Multimillion-Dollar Global Networking Contract from R.R. Donnelley & Sons Company

Chicago, Illinois, May 30, 2006

AT&T Inc. (NYSE: T) today announced that it has won a multimillion-dollar global networking contract from R. R. Donnelley & Sons Company (NYSE: RRD), the world's premier full-service provider of print and related services, including document-based business-process outsourcing. Specific terms of the contract were not disclosed.

Under the agreement, AT&T will provide an Internet Protocol Virtual Private Network (IP VPN) based on AT&T's industry-leading Multiprotocol Label Switching (MPLS) platform that prioritizes and directs network traffic — efficiently and effectively. Since IP is a standardized communications protocol, RR Donnelley will be able to consolidate multiple legacy networking technologies onto a single, secure, reliable and easily scaled network infrastructure that can carry voice, video and other types of data traffic. The AT&T solution will enable RR Donnelley to transition from traditional phone services to Voice over Internet Protocol (VoIP) technology.

The contract renews and expands an existing strategic relationship in which AT&T provides RR Donnelley with a full range of networking services, including local, long distance and conferencing services. AT&T also provides hosting services to RR Donnelley from one of its 30 Internet data centers (IDCs) around the world.

"We're pleased to have AT&T as our global networking services provider," said Ken O'Brien, chief information officer of RR Donnelley.

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 55.8 million wireless customers. Additional information about AT&T Inc. and AT&T products and services is available at www.att.com.

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