Exhibit 99.1

IR Contacts:
Julia Harper
Chief Financial Officer
503-615-1250
julia.harper@radisys.com

Brian Bronson
VP of Finance and Business Development
RadiSys Corporation
503-615-1281
brian.bronson@radisys.com

RadiSys Announces Fourth quarter and year-end Results
Full year revenues and earnings up over prior year

     HILLSBORO, OR — February 2, 2006 — RadiSys Corporation (Nasdaq: RSYS), a leading global provider of advanced embedded systems, reported revenues of $61.9 million for the quarter ended December 31, 2005. Net income for the quarter was $4.9 million, or $.20 per diluted share, versus net income of $2.8 million, or $.13 per diluted share, a year ago. The results for the fourth quarter include a tax benefit of $2.2 million, or $.08 per share, associated primarily with a projected increase in future utilization of deferred tax assets. For the year ended December 31, 2005, revenues were $260.2 million, which is up from $245.8 million for the year ended December 31, 2004. Net income for the year ended December 31, 2005 was $16.0 million, or $.68 per diluted share, compared to net income of $13.0 million, or $.59 per diluted share for the year ended December 31, 2004.

     “Overall, I am very pleased with our progress in 2005,” said Scott Grout, Chief Executive Officer. “Although our fourth quarter wireless infrastructure revenue finished below our original expectations, we delivered another year of revenue and earnings growth and increased our net cash position by approximately $35 million in the year. Strategically, we made very significant progress on our new products such as ATCA and Com-E, to position ourselves to take advantage of what we believe are large emerging opportunities in our target markets. In the fourth quarter, we closed additional business with our new Promentum and Procelerant product lines in applications such as broadband wireless packet networks, IP telephony, QOS management, multimedia messaging and industrial and medical imaging systems.”

     In conjunction with the 3GSM trade show later this month in Barcelona, Spain, the Company will formally introduce the Promentum SYS-6010, a 10 Gigabit ATCA application ready platform targeted for use in high-bandwidth dataplane applications. Until now, ATCA has principally been targeted for use in ancillary network control applications such as session setup, monitoring and management. With the introduction of the Promentum SYS-6010 platform, RadiSys expands the domain of use for ATCA into core traffic-bearing applications that require significantly greater bandwidth and traffic processing capabilities. The Promentum SYS-6010 will deliver the highest speed I/O, switching and packet processing capacities to be implemented in an ATCA system. Scheduled for early availability mid-2006, this solution will be implemented in a highly flexible and reliable architecture that includes comprehensive system management capability. The SYS-6010 is targeted at applications such as IMS (IP Multimedia Subsystem), Radio Network Controllers, Base Station Controllers, Media Gateways, and Call Servers.

     Business Outlook

     The following statements are based on current expectations as of the date of this press release. These statements are forward-looking, and actual results may differ materially. The Company assumes no obligation to update these statements.

     Commenting on the business outlook, Scott Grout, CEO, said, “For the first quarter, we currently expect to see revenues of $64 to $67 million and diluted earnings per share, excluding stock compensation expense of approximately $1 million, in the range of $0.10 to $0.12. We expect revenue to be sequentially higher as our wireless business moves toward recent run-rate levels.

     In closing, Mr. Grout stated, “Our team has made tremendous progress over the past year. We are confident that our strategy will put us in a position of strength to capitalize on the growing movement toward standards-based platforms across our target markets. We are still in the early and defining days of this movement and we believe that our customer intimacy, market-leading products and technologies and talented global team, will put us in a leadership role as this market opportunity unfolds.”

     RadiSys will provide more details about the reported results and current outlook during a conference call scheduled for 5 PM Eastern Time today. The public is invited to participate in the conference call by either calling 1-888-333-0027 and referencing conference ID# 3970936 or listening via live audio webcast on the RadiSys web-site at www.radisys.com. Replays of the call will be available through February 17, 2006 at 1-800-642-1687 for domestic dial-in, 706-645-9291 for international dial-in, referencing conference ID# 3970936, or via audio webcast at: www.radisys.com.

     About RadiSys

     RadiSys (Nasdaq: RSYS) is a leading provider of advanced embedded solutions for the Communications Networking and Commercial Systems markets. Through intimate customer collaboration, and combining innovative technologies and industry leading architecture, RadiSys helps OEMs bring better products to market faster and more economically. RadiSys products include embedded boards, platforms and systems, which are used in today’s complex computing, processing and network intensive applications.

     RadiSys, Procelerant and Promentum are registered trademarks of RadiSys Corporation.

     Use of Non-GAAP Financial Measures

          In addition to disclosing financial results calculated in accordance with GAAP, the financial outlook statements in the Company’s earnings release contain non-GAAP financial measures that exclude the effects of non-cash, equity-based stock compensation expense recognized as a result of the Company’s adoption of FAS 123R. Beginning with the first quarter 2006 earnings release, the Company will include non-GAAP financial measures of its financial results for the reporting period that exclude the income statement effects of non-cash, equity-based stock compensation expense. The Company believes that the presentation of results excluding non-cash, equity-based stock compensation expense will provide meaningful supplemental information to investors that are indicative of the Company’s core operating results. The non-GAAP financial measures disclosed by the Company should not be considered a substitute for or superior to financial measures calculated in accordance with GAAP, and reconciliations between GAAP and non-GAAP financial measures should be carefully evaluated. The non-GAAP financial measures used by the Company may be calculated differently from, and therefore may not be comparable to, similarly titled measures by other companies.

     Forward-looking Statements

          This press release contains forward-looking statements, including the statements about the Company’s guidance for the first quarter, particularly with respect to anticipated revenues, diluted earnings per share, the amount of stock compensation expense and our business strategy. Actual results could differ materially from our guidance and expectations in these forward-looking statements as a result of a number of risk factors, including, the risk factors listed from time to time in RadiSys’ SEC reports, including those listed under “Risk Factors” in RadiSys’ Annual Report on Form 10-K for the year ended December 31, 2004, and in the RadiSys Quarterly Reports on Form 10-Q filed with the SEC each fiscal quarter, and other filings with the SEC, copies of which may be obtained by contacting the Company at 503-615-1100 or from the Company’s investor relations web site at http://www.RadiSys.com. Although forward-looking statements help provide complete information about RadiSys, investors should keep in mind that forward-looking statements are inherently less reliable than historical information. All information in this press release is as of February 2, 2006. The Company undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the Company’s expectations.

          For press information only: Lyn Pangares, RadiSys Corporation, 503-615-1220, lyn.pangares@radisys.com.

RADISYS CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share amounts, unaudited)

	For the Three Months Ended						For the Year Ended
	December 31,						December 31,
	2005			2004			2005			2004
Revenues	$	61,905		$	62,710		$	260,234		$	245,824
Cost of sales		44,725			42,464			183,398			166,652
Gross margin		17,180			20,246			76,836			79,172
Research and development		7,571			7,690			29,784			28,214
Selling, general and administrative		7,509			7,365			30,084			30,448
Intangible assets amortization		513			514			2,052			2,226
Restructuring and other charges		127			1,442			1,128			1,012
Income from operations		1,460			3,235			13,788			17,272
Loss on repurchase of convertible subordinated notes		(46	)		—			(50	)		(387	)
Interest expense		(457	)		(545	)		(2,053	)		(3,565	)
Interest income		2,017			986			6,337			3,416
Other expense, net		(270	)		(234	)		(879	)		(472	)
Income before income tax provision (benefit)		2,704			3,442			17,143			16,264
Income tax provision (benefit)		(2,181	)		606			1,185			3,253
Net income	$	4,885		$	2,836		$	15,958		$	13,011
Net income per share:
Basic	$	0.24		$	0.15		$	0.79		$	0.69
Diluted	$	0.20		$	0.13		$	0.68		$	0.59
Weighted average shares outstanding:
Basic		20,543			19,296			20,146			18,913
Diluted		25,231			24,085			24,832			23,823

RADISYS CORPORATION

CONSOLIDATED BALANCE SHEETS
(In thousands)

	December 31,		December 31,
	2005		2004
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	90,055	$	80,566
Short-term investments, net		135,800		78,303
Accounts receivable, net		39,055		42,902
Other receivables		3,886		2,808
Inventories, net		21,629		22,154
Other current assets		2,426		2,675
Deferred tax assets		4,033		4,216
Total current assets		296,884		233,624
Property and equipment, net		13,576		14,002
Goodwill		27,463		27,521
Intangible assets, net		2,159		4,211
Long-term investments, net		—		39,750
Long-term deferred tax assets		25,000		23,224
Other assets		4,082		2,906
Total assets	$	369,164	$	345,238
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	36,903	$	31,585
Accrued wages and bonuses		4,829		5,626
Accrued interest payable		224		378
Accrued restructuring		856		1,569
Other accrued liabilities		8,279		7,832
Total current liabilities		51,091		46,990
Long-term liabilities:
Convertible senior notes, net		97,279		97,148
Convertible subordinated notes, net		2,498		9,867
Total long-term liabilities		99,777		107,015
Total liabilities		150,868		154,005
Shareholders’ equity :
Preferred stock — $.01 par value, 10,000 shares authorized; none issued or outstanding		—		—
Common stock — no par value, 100,000 shares authorized; 20,703 and 19,655 shares issued and outstanding at December 31, 2005 and December 31, 2004		193,839		182,705
Retained earnings		20,275		4,317
Accumulated other comprehensive income:
Cumulative translation adjustments		4,182		4,211
Total shareholders’ equity		218,296		191,233
Total liabilities and shareholders’ equity	$	369,164	$	345,238