-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 EeznarQ2HT4NluroctGN6rrKJWih0AulXXnz/IrVW/xB6gkDxjlT7k1AiseYWNNE
 YsTCOfPbwEnugNCobo/ymw==

<SEC-DOCUMENT>0001263923-03-000004.txt : 20030917
<SEC-HEADER>0001263923-03-000004.hdr.sgml : 20030917
<ACCEPTANCE-DATETIME>20030917121730
ACCESSION NUMBER:		0001263923-03-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030915
FILED AS OF DATE:		20030917

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEPIANE CHRISTIAN ANTHONY
		CENTRAL INDEX KEY:			0001263923

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-26844
		FILM NUMBER:		03899004

	BUSINESS ADDRESS:	
		STREET 1:		5445 NE DAWSON CREEK DRIVE
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
		BUSINESS PHONE:		5036151789

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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-09-15</periodOfReport>
    <issuer>
        <issuerCik>0000873044</issuerCik>
        <issuerName>RADISYS CORP</issuerName>
        <issuerTradingSymbol>RSYS</issuerTradingSymbol></issuer><reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001263923</rptOwnerCik>
            <rptOwnerName>LEPIANE CHRISTIAN ANTHONY</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5445 NE DAWSON CREEK DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>HILLSBORO</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97124</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP of Worldwide Sales</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Incentive Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>17.58</value></conversionOrExercisePrice><transactionDate><value>2003-09-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>17064</value></transactionShares><transactionPricePerShare><footnoteId id="F2"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-09-15</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2010-09-15</value></expirationDate><underly
ingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>17064</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>17064</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Non-Qualified Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>17.58</value></conversionOrExercisePrice><transactionDate><value>2003-09-15</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>57936</value></transactionShares><transactionPricePerShare><footnoteId id=
"F2"/></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-09-15</value><footnoteId id="F1"/></exerciseDate><expirationDate><value>2010-09-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>57936</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>57936</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value/></natureOfOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">ISO and NQ grant on this date vest in conjunction with each other under the ISO 100,000 limit rule.  Vesting schedule is one year from date of grant, option shall be exercisable for one-third of the to
tal option shares and shall be exercisable in monthly increments equal to 1/36th of the total option shares, cumulatively, each month thereafter.</footnote><footnote id="F2">No price available upon grant of shares,</footnote></footnotes><remarks/><ownerSignature><signatureName>Julia Harper - Attorney-in-fact</signatureName><signatureDate>2003-09-17</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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