Press Release

RadiSys to Present at the Thomeas Weisel Partners Technology and Telecom Conference on Feburary 9, 2010

HILLSBORO, Ore. — January 29, 2010 — RadiSys® Corporation (NASDAQ: RSYS), a leading global provider of application-ready software and hardware platforms for use in the communications, multi-media, defense and medical markets, announced that it will participate in the Thomas Weisel Partners Technology and Telecom Conference to be held February 8-10 in San Francisco, CA. Brian Bronson, RadiSys Chief Financial Officer, will present an overview of the Company’s business and strategy on Tuesday, February 9, 2010 at 4:25 p.m. PT. A live audio webcast and a replay of the event will be available on the Company’s investor relations website at http://investor.radisys.com/ .

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About Radisys

RadiSys (NASDAQ: RSYS) is a leading provider of application-ready software and hardware platforms for use in the communications, multi-media, defense and medical markets. RadiSys’ innovative and market leading technologies help equipment manufacturers and network operators bring the most advanced products and services to market faster and more economically. For more information, visit http://www.radisys.com, write to info@radisys.com, or call 800-950-0044 or 503-615-1100. Editors seeking more information may contact Lyn Pangares at RadiSys Corporation at 503-615-1220 or lyn.pangares@radisys.com.