Press Release

RadiSys To Present At The RBC Capital Markets' 2009 Technology, Media and Communications Conference on June 9, 2009

HILLSBORO, Ore. —May 27, 2009 — RadiSys® Corporation (NASDAQ: RSYS), a leading global provider of advanced embedded solutions, announced that it will participate in the RBC Capital Markets’ 2009 Technology, Media and Communications Conference to be held June 9-10, 2009 in San Francisco, CA. Brian Bronson, RadiSys Chief Financial Officer, will present an overview of the Company’s business and strategy on Tuesday, June 9, 2009 at 9 a.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/ .

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.