Concurrent Announces Version 2.1 RedHawk Real-Time Linux Operating System For Intel And AMD Processors.

Business Editors/High-Tech Writers

Linux On Wall Street Booth #212

ATLANTA--(BUSINESS WIRE)--April 27, 2004

RedHawk(TM) Linux 2.1(R) Offers Superior Performance

On 32-Bit and 64-Bit Platforms

Concurrent Computer Corporation (NASDAQ: CCUR), Integrated Solutions Division, today announced availability of version 2.1 of its RedHawk Linux real-time operating system. RedHawk 2.1 is one of the most deterministic Linux operating system available today, supporting both 32-bit Intel(R) Xeon(TM) and 64-bit AMD(R) Opteron(TM) platforms in the same release. Based on the 2.6.3 Linux kernel, RedHawk 2.1 is compatible with the popular Red Hat(TM) Inc. Enterprise Linux distribution. It began shipping with Concurrent's iHawk COTS systems this month and is now in use by customers on Xeon and Opteron platforms developing 32-bit and 64-bit real-time applications.

RedHawk 2.1 provides the same high performance level, API and user interface on Xeon and Opteron platforms, allowing customers the choice of processor families to suit their needs. RedHawk incorporates all the standard Linux advancements provided by the 2.6.3 kernel such as significant file system performance improvements plus a wealth of Concurrent real-time enhancements. Concurrent's refinements include kernel-level priority inheritance support, a Frequency Based Scheduler (FBS), process and IRQ shielding extensions, user-level real-time Hyper-Treading control for Intel Xeon platforms, user-level spin locks, significant real-time performance tuning and many additional improvements. A prime example of RedHawk's real-time superiority is its guaranteed interrupt response time of less than 30 microseconds on a shielded processor.

RedHawk 2.1 on 32-bit Xeon-based iHawks supports features such as user-level control of Hyper-Threading which allows each physical CPU to be divided into two logical CPUs for more efficient processing. On 64-bit Opteron iHawks, users can run existing off-the-shelf 32-bit applications, recompile 32-bit RedHawk applications into 64-bit mode for improved performance and extended addressing, as well as develop new 64-bit applications on the same platform. RedHawk 2.1 is designed to utilize the unique features of both processor families for maximum flexibility and performance.

RedHawk Linux on Concurrent's 32-bit Intel(R) Xeon(TM) powered iHawk systems has already proven itself 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. RedHawk is also used in telecommunications testing, U.S. and European automotive simulation systems and industrial control applications.

"Concurrent's support for the Opteron platform 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, Concurrent director of Marketing, Integrated Solutions Division. "RedHawk 2.1 is available on iHawk COTS systems allowing our customers the choice of 32-bit or 64-bit platforms that are best suited to their high-performance, mission-critical needs."

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.