Concurrent Announces iHawk Real-Time Linux Systems Powered By AMD Opteron Processor-Based Servers From Celestica.

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ATLANTA--(BUSINESS WIRE)--April 28, 2004

iHawk Series 870 Systems Available For Immediate Delivery

Concurrent Computer Corporation (NASDAQ: CCUR), Integrated Solutions Division, today announced the immediate availability of 64-bit versions of its highly deterministic real-time computing systems running RedHawk(TM) Linux(R). iHawk Series 870 systems are powered by 32- and 64-bit capable AMD Opteron(TM) processors and offer the superior floating point performance, increased memory addressability and industry-leading processing power for which the AMD Opteron processor is known.

Concurrent has teamed with Celestica (NYSE: CLS)(TSX: CLS) and AMD (NYSE: AMD) in order to offer its powerful new iHawk Series 870 platform. Celestica and AMD jointly created the Validated Server Program (VSP) to enable world-class server solutions to meet the needs of VSP partners such as Concurrent.

Concurrent's iHawk 870 systems are initially available in three platforms to meet a variety of customer requirements for high-performance data acquisition, simulation, process control and other demanding applications. The initial configurations are a 1U dual-processor rack mount system and a 4U quad-processor rack mount system. These systems are scalable and configurable to meet customer requirements for the most demanding applications. Concurrent will also build its own 3U dual AMD Opteron processor-based rack mount system with high-performance AGP video capabilities for customers with demanding graphics requirements.

Concurrent's 32-bit iHawk Series 860 systems have proven themselves in mission-critical programs throughout the world including the Eurofighter training device, FA-18 and EA-6B simulation systems and the Theater High Altitude Area Defense (THAAD) missile program. They are also used in telecommunications testing, U.S. and European automotive simulation systems and industrial control applications. iHawk Series 870 systems build upon this success and allow our customers the choice of a 32- or 64-bit platform that is best suited to their high-performance, real-time and evolving needs.

"Concurrent has continued its tradition as a leading real-time technology innovator with the introduction of its AMD Opteron processor-powered iHawk systems," said Ben Williams, director of the Server/Workstation Business Segment at AMD. "AMD Opteron processors and iHawk systems offer a range of functionality, industry-standard x86 compatibility, and leading-edge performance that maximizes customer value."

"We are pleased that Concurrent has selected our products for use in such demanding markets as simulation, data acquisition, process control and testing," said Steve Van Binsbergen, vice president and general manager, Computing Systems Unit, Celestica. "Concurrent's offering validates our commitment to supplying the system builder and system integrator communities with technologies that offer exceptional quality, performance and reliability".

"The addition of AMD Opteron processor-based platforms to our iHawk family allows us to address new high-tech markets, such as medical imaging, video encoding/decoding, and the financial industry that require larger memory addressing and increased processing power," said Gary Beerman, director of Marketing, Concurrent Integrated Solutions Division.

About Celestica

Celestica is a world leader in the delivery of innovative electronics manufacturing services (EMS). Celestica operates a highly sophisticated global manufacturing network with operations in Asia, Europe and the Americas, providing a broad range of integrated services and solutions to leading OEMs (original equipment manufacturers). A recognized leader in quality, technology and supply chain management, Celestica provides competitive advantage to its customers by improving time-to-market, scalability and manufacturing efficiency. For further information on Celestica, visit its website at www.celestica.com. The company's security filings can also be accessed at www.sedar.com and www.sec.gov.

About Concurrent

Since 1966, Concurrent (www.ccur.com), headquartered in Duluth, Georgia, has been a premier provider of high-performance, real-time computer systems, solutions, and software for commercial and government markets. The company's Integrated Solutions Division focuses on strategic market areas that include hardware-in-the-loop and man-in-the-loop simulation, data acquisition, industrial systems, and software. Concurrent's Video-On-Demand Division is a recognized leader in the digital cable market, serving North America's major cable operators in 80 markets with over 5.2 million digital subscribers and 15.8 million basic subscribers. Concurrent's proven technology provides a flexible, comprehensive, robust solution for HFC, DSL, and IP-based networks. Concurrent provides sales and support from offices throughout North America, Europe, Asia, and Australia.

Certain statements made or incorporated by reference in this release may constitute "forward-looking statements" within the meaning of the federal securities laws. When used or incorporated by reference in this release, the words "believes," "expects," "estimates," and similar expressions are intended to identify forward-looking statements. Statements regarding future events and developments and our future performance, as well as our expectations, beliefs, plans, estimates, or projections relating to the future, are forward-looking statements within the meaning of these laws. All forward-looking statements are subject to certain risks and uncertainties that could cause actual events to differ materially from those projected. The risks and uncertainties which could affect our financial condition or results of operations include, without limitation: availability of video-on-demand content; delays or cancellations of customer orders; changes in product demand; economic conditions; various inventory risks due to changes in market conditions; uncertainties relating to the development and ownership of intellectual property; uncertainties relating to our ability and the ability of other companies to enforce their intellectual property rights; the pricing and availability of equipment, materials and inventories; the limited operating history of our video-on-demand segment; the concentration of our customers; failure to effectively manage growth; delays in testing and introductions of new products; rapid technology changes; demand shifts from high-priced, proprietary real-time systems to low-priced, open server systems; system errors or failures; reliance on a limited number of suppliers; uncertainties associated with international business activities, including foreign regulations, trade controls, taxes, and currency fluctuations; the highly competitive environment in which we operate; failure to effectively service the installed base; the entry of new well-capitalized competitors into our markets; and the valuation of equity investments and collectibility of notes receivable, including but not limited to our equity and debt investment in Thirdspace.

Other important risk factors are discussed in our Form 10-K filed with the Securities and Exchange Commission on September 25, 2002 and may be discussed in subsequent filings with the SEC. The risk factors discussed in such Form 10-K under the heading "Risk Factors" are specifically incorporated by reference in this press release. Our forward-looking statements are based on current expectations and speak only as of the date of such statements. We undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of future events, new information, or otherwise.

Note to Editors: For additional company or product information from Concurrent Computer Corporation, please contact Concurrent Computer Corporation, 4375 River Green Parkway, Suite 100, Duluth, GA 30096. Call toll free in the U.S. and Canada at [phone], fax [phone]. Readers can also access information through the company's Web site at www.ccur.com.

Concurrent Computer Corporation and its logo are registered trademarks of Concurrent Computer Corporation. All other product names are trademarks or registered trademarks of their respective owners. AMD, AMD Opteron, and combinations thereof, are trademarks of Advanced Micro Devices, Inc.