Radisys To Report First Quarter 2010 Earnings And Host Conference Call on April 27, 2010

HILLSBORO, OR — April 8, 2010 — Radisys® Corporation (NASDAQ: RSYS), a leading provider of innovative hardware and software platforms for next generation IP-based wireless, wireline and video networks, will announce results for the first quarter of 2010 at 4:05 p.m. ET on Tuesday, April 27, 2010. Following the release, Scott Grout, Chief Executive Officer and Brian Bronson, Chief Financial Officer, will host a conference call at 5:00 p.m. ET to discuss the Company’s results, along with business highlights and the outlook.

To participate in the live conference call, dial (888) 333-0027 in the U.S. and Canada or (706) 634-4990 for all other countries and reference conference ID# 67989520. The live conference call will also be available via webcast on the Radisys investor relations website at http://investor.radisys.com/.

A replay of the conference call will be available two hours after the call is complete until 11:59 p.m. ET on Tuesday, May 11, 2010. To access the replay, dial (800) 642-1687 in the U.S. and Canada or (706) 645-9291 for all other countries with conference ID# 67989520. A replay of the webcast will be available for an extended period of time on the Radisys investor relations website at http://investor.radisys.com/.

For more information, contact:

About Radisys

Radisys (NASDAQ: RSYS) is a leading provider of embedded wireless infrastructure solutions for telecom, aerospace, defense and public safety applications. Radisys’ market-leading ATCA, IP Media Server and COM Express platforms coupled with world-renowned Trillium software, services and market expertise enable customers to bring high-value products and services to market faster with lower investment and risk. Radisys solutions are used in a wide variety of 3G & 4G / LTE mobile network applications including: Radio Access Networks (RAN) solutions from femtocells to picocells and macrocells, wireless core network applications, Deep Packet Inspection (DPI) and policy management; conferencing and media services including voice, video and data, as well as customized mobile network applications that support the aerospace, defense and public safety markets.

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