DENVER, March 10, 2005 ? Qwest Communications International Inc. (NYSE: Q) today announced a new contract to significantly expand network connectivity for several U. S. Department of Energy (DOE) sites in support of the Energy Sciences Network (ESnet) run by the DOE?s Lawrence Berkeley National Laboratory. The five-year, multimillion-dollar contract continues Qwest?s relationship with ESnet, which began in 1999.

Under the contract, Qwest will create a cost-effective, fully managed metropolitan area network that will be large enough to support the vast amount of data generated by DOE researchers. The network will be 20 gigabits per second (Gbps) (20,000 megabits/sec) Ethernet connections with the capability to expand to over 100 Gbps ? roughly equivalent to having each lab exchanging 25 full CDs per second.

ESnet, supported by Qwest, connects scientists at some of the world?s most prestigious research facilities located in the San Francisco Bay Area. The sites include the Stanford Linear Accelerator Center at Stanford University in Menlo Park; the Joint Genome Institute in Walnut Creek; the Lawrence Livermore and Sandia National Laboratories in Livermore; the Lawrence Berkeley National Laboratory in Berkeley; the National Energy Research Scientific Computing Center in Oakland; and two hubs in Sunnyvale.

?As scientists rely increasingly on ESnet for gathering, transferring and analyzing massive amounts of scientific data, this metro area network will provide both higher bandwidth and greater reliability to ensure that researchers have access to the necessary resources,? said William Johnston, ESnet program manager at Lawrence Berkeley National Laboratory. ?This agreement with Qwest is the first in a planned series of similar upgrades in areas populated with DOE facilities.?

Qwest already provides access and backbone services for the DOE ESnet, also managed by the Lawrence Berkeley National Laboratory. ESnet operates a multi-gigabit backbone network connecting more than 40 DOE research sites around the country.

?We are very excited to provide this capability to the Department of Energy,? said Mark Stine, chief technology officer for Qwest government services. ?The network promises to open up new possibilities for scientific collaboration and discovery.?

About Qwest

Qwest Communications International Inc. (NYSE: Q) is a leading provider of voice, video and data services. With more than 40,000 employees, Qwest is committed to the ?Spirit of Service? and providing world-class services that exceed customers? expectations for quality, value and reliability. For more information, please visit the Qwest Web site at www.qwest.com.

About ESnet

The ESnet project mission is to help accelerate the pace of progress for the broad scientific research activities within the DOE by providing advanced communications and networking support to the research community. The project focus is to provide high performance and leading-edge capabilities on a cost effective and reliable basis. Because of the broad range of research activities within the DOE, a diverse range of capabilities is required of ESnet, including very high end-to-end performance levels, global interconnectivity, remote access to very costly experimental facilities, state-of-the-art collaboration tools and support, and high reliability and availability. Additional information is available at www.es.net and http://www.sc.doe.gov/ascr/mics/esnet/index.html.


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