Sakonnet Technology Selects AT&T for New Network Services

AT&T Will Serve as Primary Network and Data Services Provider

New York, New York, June 13, 2007

AT&T Inc. (NYSE: T) today announced a new contract to provide network services to Sakonnet Technology, LLC (www.sknt.com), a market leader in Software as a Service (SaaS) for energy trading and risk management.

Under the terms of the three-year contract, AT&T will now serve as Sakonnet's primary network and data services provider, using AT&T's Internet Protocol (IP)-enabled Virtual Private Network (VPN) services to connect AT&T Internet data center sites hosting Sakonnet's Xenon® application and Sakonnet's Application Service Provider (ASP) clients in Europe and the U.S.

The fully managed IP-enabled VPN service provided by AT&T meets Sakonnet's demand for expanded bandwidth and fast, secure data flows. Sakonnet will use AT&T's VPN service to enhance performance of its Xenon trading and risk application, by accelerating price and trade data flows between client remote workstations and Xenon server sets in AT&T's Internet data center. The network will also be used to continuously transmit client trade data to servers at a second AT&T Internet data center, as part of Sakonnet's disaster-recovery (DR) service.

The VPN solution leverages AT&T's Multiprotocol Label Switching (MPLS)-enabled network, providing a secure, fully private and meshed network while delivering robust Quality of Service (QoS) capabilities that allow Sakonnet to prioritize the transfer of its most critical data. AT&T's MPLS network also provides the highest levels of reliability and redundancy and can be scaled to incorporate future growth of Sakonnet's client base.

"As our ASP clients include some of the highest-volume traders in European power markets, we need a first-rate platform for data flow," said Eric Min, Sakonnet's chief operating officer. "The network solution provided by AT&T is an example of Sakonnet's commitment to harnessing the latest technological innovations that improve our application performance and client service."

FOR MORE INFORMATION ONLINE
Web Site Links:

This AT&T news release and other announcements are available as part of an RSS feed at www.att.com/rss.

About Sakonnet Technology
Sakonnet Technology is the market leader in Software as a Service (SaaS) for energy trading and risk management. Sakonnet's expert international teams provide an unrivalled level of hosting, support, upgrade and consulting services linked to its advanced Xenon® platform. These services along with Xenon's streamlined interfaces and workflow, transform the end-user experience, resulting in higher productivity, stronger risk control and a trading edge. Sakonnet addresses the needs of energy companies, banks and hedge funds trading in power, natural gas, crude oil and related markets and has offices in New York, London and Rio de Janeiro. For more information, visit www.sknt.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.

©2007 AT&T Knowledge Ventures. All rights reserved. AT&T and the AT&T logo are trademarks of AT&T Knowledge Ventures. Subsidiaries and affiliates of AT&T Inc. provide products and services under the AT&T brand.