Radisys Earns Sixth Consecutive #1 Media Server Vendor Ranking

Radisys Recognized for Leadership in IP Media Server Market by Market Research Firm Infonetics Research.

HILLSBORO, OR – March 1, 2010 – Radisys® Corporation (NASDAQ: RSYS), a leading global provider of application–ready software and hardware platforms, has been named the market leader in media servers for the sixth consecutive year by premier market research firm, Infonetics Research. In its study, “Service Provider VoIP Equipment and Subscribers: Quarterly Worldwide and Regional Market Share, Size and Forecasts,” Infonetics Research reported Radisys’ family of Convedia® media servers captured 60 percent of the total market for fourth quarter 2009 and 57 percent overall for calendar year 2009, an eight and 10 percent gain respectively from 2008.

“For an impressive sixth year in a row, Radisys not only continued its position as the top vendor of IP media servers, but also managed to expand its worldwide market share in 2009, said Diane Myers, Directing Analyst, Service Provider VoIP and IMS, Infonetics Research. “As testament of true innovation and product category leadership, Radisys continues to be a key influencer among media server vendors, staying strong and thriving in today’s challenging market conditions.”

Radisys’ leadership in IP media server products and technology is driven by its increasing global success and commitment to delivering innovative products. Radisys recently announced its new Integrated Mobile Media Server (IMMS), enhancing Mobile Service Providers’ ability to grow new revenues from the explosion of 3G mobile video services and emerging 4G Long Term Evolution (LTE) deployments.

“We are pleased to continue our leadership in the exciting media server market, expanding our overall market share, while continuing to introduce industry–first product enhancements to our customers, such as our Voice Quality Enhancement (VQE) features introduced during 2009, along with our recent IMMS announcement,” said David Smith, General Manager, Media Server Business Unit, Radisys. “We look forward to continued success in 2010, committing ourselves to an ongoing delivery of revenue–generating products and services that our customers desire.”

About Convedia Media Servers

Radisys Convedia Media Servers support a broad set of IP audio, video, speech and fax media processing features essential for next–generation telecommunications applications. Ranked the market–leading IP media server vendor for six consecutive years by market research firm Infonetics Research, the Radisys Convedia Media Server family delivers optimal performance and reliability, scalability, and a low total cost of ownership for media–intensive IP Multimedia Subsystem (IMS) networks and services. These media servers enable fixed mobile convergence by delivering a shared IP media processing resource for any access network, including wireless, broadband, cable, PSTN or satellite. The system’s multi–service versatility enables service providers, and their application development partners, to rapidly deploy innovative revenue–generating telecommunications services including multimedia conferencing, ringback tones, unified communications and IP contact center applications.

About Radisys

Radisys (NASDAQ: RSYS), a global leader in open telecom solutions, enables service providers to drive disruption with new open architecture business models. Radisys’ innovative disaggregated and virtualized enabling technology solutions leverage open reference architectures and standards, combined with open software and hardware to power business transformation for the telecom industry, while its world-class services organization delivers systems integration expertise necessary to solve communications and content providers’ complex deployment challenges.

Radisys, Continuous Computing and Trillium are registered trademarks of Radisys Corporation.