Toshiba Medical Systems Europe Chooses MCI To Provide Private IP Network Services

New Private IP solution enables TMSE to benefit from high network performance

Amsterdam, 14 June 2005 - MCI, Inc. (NASDAQ: MCIP) today announced that it has been selected to provide a Private IP network for Toshiba Medical Systems Europe (TMSE). TMSE is a subsidiary of Toshiba Corporation, a leader in information and communications systems, electronic components, consumer products and power systems.

TMSE has been an MCI customer since 2002 and are using MCI's Public IP, MCI's Internet Access Service and Global Roaming Remote Access solution.

To better support the communication demands associated with TMSE's site expansion, the company has recently migrated to a Private IP solution. This solution provides a high performance, reliable network that offers maximum flexibility, security, any-to-any connectivity and high network performance for the approximately 600 end-users of TMSE in Austria, Belgium, Germany, France, Italy, the Netherlands, Portugal, Spain, Switzerland and the UK.

"MCI's extended relationship with TMSE reflects our approach to understand our customers' objectives and to deliver products and services designed to help them meet their business goals," said Paul Jansen, Sales Director for MCI in the Netherlands. "With MCI's Private IP solution, applications can be prioritised, which enables the end users in different countries to work more efficiently and effectively."

MCI in the Netherlands provides a comprehensive portfolio of voice, data and Internet services enabling organizations and businesses to migrate their individual communication solutions to innovative and efficient technologies at their own pace. The range of dedicated Internet services offers organizations like TMSE a variety of access line speeds and bandwidth options creating a seamless platform for all-digital communications and convergence applications.

About Toshiba Medical Systems Europe
A high quality range of diagnostic systems, including CT, has made Toshiba Medical Systems one of the world's leading suppliers of medical imaging tools. With a strong commitment to R&D, innovative technology is combined with a range of business services to produce total healthcare solutions. These advanced applications not only meet your most immediate clinical needs, they provide a solid foundation for a lifetime of diagnostic confidence.

About Toshiba Corporation
Toshiba Corporation is a leader in information and communications systems, electronic components, consumer products and power systems. The company's integration of these wide-ranging capabilities assures its position as an innovator in advanced components, products and systems. Toshiba has more than 161,000 employees worldwide and annual sales of US$53 billion (FY2003).

About MCI, Inc.

MCI, Inc. (NASDAQ: MCIP) is a leading global communications provider, delivering innovative, cost-effective, advanced communications connectivity to businesses, governments and consumers. With one of the most expansive global IP backbones and wholly-owned data networks, MCI develops the converged communications products and services that are the foundation for commerce and communications in today's market. For more information, go to www.mci.com.