Marconi Introduces High-Speed Media and Protocol Gateway for High-Performance Computing Community Marconi's MPG-1000 Moves Data With Highest Speed Encryption for Worldwide Access and Security PITTSBURGH, Nov. 8 /PRNewswire-FirstCall/ -- Marconi Corporation plc (LONDON: MONI and Nasdaq: MRCIY) today announced a new networking device, the MPG(TM)-1000, an OC-192c Media and Protocol Gateway that extends the benefits of high-speed encryption to a variety of network interfaces in use over local-area, wide-area and storage-area networks (LAN, WAN and SAN). The MPG-1000 will be demonstrated at the SC2004 High Performance Computing, Networking and Storage Conference in Pittsburgh on November 8 - 11 in the StorCloud booth (#1542) and will be on display at Marconi Federal's booth #1132. "The MPG-1000 Media and Protocol Gateway fills a need in the high-performance computing community by connecting a variety of interfaces to very high-speed, reliable, secure networks, making mission-critical data available worldwide at an instant's notice," said Gerry Kolosvary, president of Marconi Communications Federal, Inc. "The MPG-1000 gives high-performance computing users -- whether they are in the government, research or private industry -- a simple, cost-effective device for transporting their data across the WAN as if locally interconnected through SCSI, Fiber Channel or Infiniband." In addition, by supporting encryption of data traffic at speeds up to OC-192c (10 Gbps) via a variety of network interfaces, Marconi's MPG-1000 ensures that all mission-critical applications -- regardless of transport protocol -- can be secured across LANs, WANs and SANs for defense, intelligence and high-performance computing users, such as cluster, grid or supercomputing. Examples of critical applications might include secure transport of multimedia, such as real-time surveillance video from fixed or mobile cameras or other sensor-derived data; the transport of very large, image-rich data, such as geo-positioning files used in weather forecasting, oil and gas exploration; and defense and intelligence activities. The MPG-1000 will provide 1 Gbps and 10 Gbps Ethernet services over OC-48c and OC-192c transport technologies -- Synchronous Optical Network (SONET), Optical Cross Connect, and Asynchronous Transport Mode (ATM) -- in its initial release, planned for early 2005. In future releases, the platform will support interfaces for Infiniband, Packet over SONET, Fiber Channel, and SMPTE 292M (High-Definition Television). "The MPG-1000 will permit US Government customers to support mission-critical IP services at gigabit speeds by bulk encrypting IP packets, using existing KG75 encryptors over the newest Government networks, including GIG-BE," said Kolosvary. About Marconi Communications Federal, Inc. Marconi Communications Federal, Inc. is a trusted partner of the U.S. Federal Government, providing mission-critical networking and telecommunications equipment; communication facilities survey, design and construction; classified and unclassified professional services and customer support. Marconi Communications Federal supports a $1.5 billion installed base of systems within various U.S. government agencies. Marconi Communications Federal, Inc. is a wholly owned subsidiary of Marconi Corporation plc (LONDON: MONI and Nasdaq: MRCIY) . About Marconi Corporation plc Marconi Corporation plc is a global telecommunications equipment, services and solutions company. The company's core business is the provision of innovative and reliable optical networks, broadband routing and switching and broadband access technologies and services. The company's customer base includes many of the world's largest telecommunications operators. The company is listed on the London Stock Exchange under the symbol MONI and listed on NASDAQ under the symbol MRCIY. Additional information about Marconi Corporation can be found at http://www.marconi.com/. All brands or product names are trademarks of their respective holders. This press release contains forward-looking statements with respect to products, partners, customers, future growth and other matters. Please refer to the Form 10-K report filed by Marconi Corporation plc with the United States Securities and Exchange Commission for a discussion of risks that could cause actual results to differ materially from such statements. Press enquiries: Geof Becker, tel: 724-742-6377; email: Investor enquiries: Heather Green, tel: + 44 207 306 1735; email: Industry Analyst enquiries: Colleen Rosander tel: 724-742-7794; email: DATASOURCE: Marconi Corporation plc CONTACT: Press - Geof Becker, +1-724-742-6377, , or Investor enquiries - Heather Green, +44-207-306-1735, , or Industry Analyst enquiries - Colleen Rosander, +1-724-742-7794, , both of Marconi Corporation plc Web site: http://www.marconi.com/

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