Company to launch the AXR Access Radio solution and announce a new partnership with Allot Communication at this year's show LAS VEGAS, Oct. 24 /PRNewswire-FirstCall/ -- TELECOM '05 -- Marconi Corporation plc (LONDON: MONI and Nasdaq: MRCIY) will launch the AXR Access Radio for North America, a multiservice point-to-point, and point-to-multipoint fixed wireless radio solution for Ethernet, cellular and broadband backhaul, at this year's TELECOM '05. The company will also announce a new partnership with Allot Communications, a leading provider of high-performance traffic management solutions. These announcements reinforce Marconi's commitment to providing carrier-class telecommunications solutions designed to meet the stringent requirements of service provider networks. At the Marconi exhibit, the company will showcase the Marconi Service Router, an edge router designed to help carriers "virtualize" their networks, delivering premium IP services with fewer devices, managed more effectively. Marconi will have technical experts available to discuss its fixed wireless access solutions, IP edge, core and access routers, and Ethernet switches and switch routers. Tom Nolle, president of CIMI Corporation, a leading U.S. telecoms consultancy, will host a series of free presentations on service-oriented architectures, next-generation IP services, IPTV trends and virtual private application networks. Allot Communications will also present at the Marconi booth and discuss its NetEnforcer family of traffic management and monitoring applications. Allot will review the importance of an open delivery platform, as in the Marconi Service Router's Dynamic Services Blade, and its suitability for empowering service providers with the NetEnforcer application by utilizing a completely open standard Linux environment. Marconi is also sponsoring a hospitality suite for customers, partners and invited guests on Tuesday, October 25, 2005, from 6:00 p.m. to 7:00 p.m. in Veronese Room 2402 on the casino level of the Venetian Hotel Resort and Casino. Notes to editors Press and Industry Analyst Meetings At TELECOM '05, Marconi business executives will be available for press and industry analyst briefings. Press and analysts interested in scheduling briefings should contact Colleen Rosander, Director of Analyst and Media Relations, at 724-742-7794 or . About TELECOM '05 Held in the Venetian Conference Center in Las Vegas, Nevada, on October 24-26, 2005, TELECOM '05 is a preview of what's next for the communications industry. Recently named one of the "Fastest 50" growing trade shows in North America by TradeShow Week magazine, TELECOM '05 draws key communications leaders from around the world to view new technologies and learn more about all aspects of the communications industry as lines between cable, wireline, wireless and satellite platforms continue to blur. For more information on TELECOM '05, visit http://www.telecom05.com/ . About Allot Communications Allot's high-performance traffic management solutions are deployed by some of the world's largest service providers, enterprises and universities to improve application performance, control bandwidth costs and optimize network efficiency. In enterprise networks, Allot's highly scalable solutions help network managers ensure quality of service (QoS) by linking business policies to specific network actions that improve user productivity and contain networking costs. In service provider networks, Allot's QoS and service level agreement (SLA) enforcement capabilities maximize return on investment by managing over-subscription, throttling P2P traffic and delivering tiered rate plans along with a host of innovative service capabilities. 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 access technologies, data networks and related professional and support 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 on NASDAQ under the ticker 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 and Industry Analyst inquiries: Colleen Rosander tel: 724-742-7794; email: Investor inquiries: Karen Keyes tel: +44 207 306 1345; email: DATASOURCE: Marconi Corporation plc CONTACT: Media: Colleen Rosander, +1-724-742-7794, or , or Investors: Karen Keyes, +44-207-306-1345, or , both of Marconi Corporation plc Web site: http://www.marconi.com/ http://www.telecom05.com/

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