-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
 GSERsLD6WpVvEZBx6Q5s3s56V4sHqkE3UXMY5Cw3HjBrZjTPbzK3tIEfemJegdnS
 dL8El1Yr3c+3xh5PzqQHRQ==

<SEC-DOCUMENT>0000873044-04-000019.txt : 20040623
<SEC-HEADER>0000873044-04-000019.hdr.sgml : 20040623
<ACCEPTANCE-DATETIME>20040609133934
ACCESSION NUMBER:		0000873044-04-000019
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040601
FILED AS OF DATE:		20040602
DATE AS OF CHANGE:		20040623

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RADISYS CORP
		CENTRAL INDEX KEY:			0000873044
		STANDARD INDUSTRIAL CLASSIFICATION:	COMPUTER PERIPHERAL EQUIPMENT, NEC [3577]
		IRS NUMBER:				930945232
		STATE OF INCORPORATION:			OR
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5445 NE DAWSON CREEK DR
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
		BUSINESS PHONE:		5036461800

	MAIL ADDRESS:	
		STREET 1:		5445 NE DAWSON CREEK DRIVE
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			PATKAY JEAN PIERRE D
		CENTRAL INDEX KEY:			0001230509

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26844
		FILM NUMBER:		04855536

	BUSINESS ADDRESS:	
		STREET 1:		724 LINDEN AVE
		CITY:			LOS ALTOS
		STATE:			CA
		ZIP:			94022
		BUSINESS PHONE:		6502796130

	MAIL ADDRESS:	
		STREET 1:		724 LINDEN AVE
		CITY:			LOS ALTOS
		STATE:			CA
		ZIP:			94022
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgardoc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-06-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000873044</issuerCik>
        <issuerName>RADISYS CORP</issuerName>
        <issuerTradingSymbol>RSYS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001230509</rptOwnerCik>
            <rptOwnerName>PATKAY JEAN PIERRE D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5445 NE DAWSON CREEK DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HILLSBORO</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97124</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2004-06-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>899</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.66</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5968.6208</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>*</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>By: Brian Bronson, Attorney-in-fact  For: Jean-Pierre D. Patkay</signatureName>
        <signatureDate>2004-06-02</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----