Press Release

RadiSys To Present At The 12th Annual Needham & Company Growth Conference On January 12, 2010

HILLSBORO, Ore. —December 18, 2009 — RadiSys® Corporation (NASDAQ: RSYS), a leading global provider of advanced embedded solutions, announced that it will participate in the 12th Annual Needham & Company Growth Conference to be held on January 12, 2010 in New York, NY. Brian Bronson, RadiSys Chief Financial Officer, will present an overview of the Company's business and strategy on Tuesday, January 12, 2010 at 9:20 a.m. ET.

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/.

For more information, contact:

Brian Bronson
Chief Financial Officer
1–503–615–1281
brian.bronson@radisys.com

Holly Stephens
Finance and Investor Relations Manager
1–503–615–1321
holly.stephens@radisys.com

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.