-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 uhgslNhGnOkgjIEcfdWHiw==

<SEC-DOCUMENT>0000919574-03-002181.txt : 20031112
<SEC-HEADER>0000919574-03-002181.hdr.sgml : 20031112
<ACCEPTANCE-DATETIME>20031112190751
ACCESSION NUMBER:		0000919574-03-002181
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031014
FILED AS OF DATE:		20031112

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CSG SYSTEMS INTERNATIONAL INC
		CENTRAL INDEX KEY:			0001005757
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374]
		IRS NUMBER:				860704792
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		7887 EAST BELLEVIEW AVE
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111
		BUSINESS PHONE:		3037962850

	MAIL ADDRESS:	
		STREET 1:		7887 E. BELLVIEW AVE.
		STREET 2:		SUITE 1000
		CITY:			ENGLEWOOD
		STATE:			CO
		ZIP:			80111

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			OKUMUS AHMET H
		CENTRAL INDEX KEY:			0001127685

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27512
		FILM NUMBER:		03995457

	BUSINESS ADDRESS:	
		STREET 1:		575 LEXINGTON AVE
		STREET 2:		7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2123501575

	MAIL ADDRESS:	
		STREET 1:		575 LEXINGTON AVE
		STREET 2:		7TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>p439844_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<!-- - EDGAR Ease Plus 1.0                                   07/25/03  TT    -->
<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>3</documentType>
   <periodOfReport>2003-10-14</periodOfReport>
    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001005757</issuerCik>
        <issuerName>CSG SYSTEMS INTERNATIONAL INC</issuerName>
        <issuerTradingSymbol>CSGS</issuerTradingSymbol>
   </issuer>
   <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001127685</rptOwnerCik>
            <rptOwnerName>OKUMUS AHMET H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>575 LEXINGTON AVE</rptOwnerStreet1>
            <rptOwnerStreet2>7TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
         <isDirector>0</isDirector>
         <isOfficer>0</isOfficer>
         <isTenPercentOwner>1</isTenPercentOwner>
         <isOther>0</isOther>
      </reportingOwnerRelationship>
   </reportingOwner>
 <derivativeTable>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.50</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-14</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>39742</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Opportunity Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.00</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-14</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>27413</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Opportunity Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.00</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-14</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>4400</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Technology Value Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.00</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-14</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>10980</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Diversified Value Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>7.50</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-12-19</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>5900</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Diversified Value Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.00</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-14</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>39742</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Opportunity Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>7.50</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-21</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>12760</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Technology Value Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>7.50</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-21</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>31800</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Diversified Value Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Option (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>7.50</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-21</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>13160</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Market Neutral Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
   <derivativeHolding>
      <securityTitle>
         <value>Put Optiion (Option to Buy)</value>
      </securityTitle>
      <conversionOrExercisePrice>
         <value>8.25</value>
      </conversionOrExercisePrice>
      <exerciseDate>
         <value>2003-10-14</value>
      </exerciseDate>
      <expirationDate>
         <value>2003-11-28</value>
      </expirationDate>
      <underlyingSecurity>
         <underlyingSecurityTitle>
           <value>Common Stock</value>
         </underlyingSecurityTitle>
         <underlyingSecurityShares>
           <value>190733</value>
         </underlyingSecurityShares>
      </underlyingSecurity>
      <ownershipNature>
         <directOrIndirectOwnership>
           <value>I</value>
         </directOrIndirectOwnership>
         <natureOfOwnership>
           <value>By Okumus Opportunity Partners, LP</value>
            <footnoteId id="F1"/>
         </natureOfOwnership>
      </ownershipNature>
   </derivativeHolding>
 </derivativeTable>
   <footnotes>
      <footnote id="F1"> The securities reported on this filing are held in the accounts of certain unregistered investment companies over which the Reporting Person has investment discretion by virtue of the Reporting Person's position in the general partners of these unregistered investment companies. The Reporting Person in turn has a pecuniary interest in the securities held by said unregistered investment companies equal to his portion of the incentive allocation potentially made to the general partners of said entities each year in unaffiliated capital accounts in said entities, plus his capital accounts in said entities.</footnote>
   </footnotes>
   <remarks>++ The Reporting Person, the unregistered investment companies and the general partners affirmatively disclaim being a &quot;group&quot; for purposes of Section 16 of the Securities Exchange Act of 1934, as amended.</remarks>
   <ownerSignature>
      <signatureName>/s/ Ahmet H. Okumus++</signatureName>
      <signatureDate>2003-11-12</signatureDate>
   </ownerSignature>
</ownershipDocument>

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