UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
 
(Amendment No. 2)
                                            

CSG Systems International Inc.
-----------------------------------------------
(Name of Issuer)

Common Stock ($0.01 par value)
-------------------------------------------
(Title of Class of Securities)

126349109
-------------------------------------------
(CUSIP Number)

December 31, 2004
-------------------------------------------
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which 
this Schedule is filed:

                            [X]     Rule 13d-1(b)
                            [   ]     Rule 13d-1(c)
                            [   ]     Rule 13d-1(d)

         The remainder of this cover page shall be filled out for 
a reporting person's initial filing on this form with respect to 
the subject class of securities, and for any subsequent amendment 
containing information which would alter the disclosures provided 
in a prior cover page.

         The information required in the remainder of this cover 
page shall not be deemed to be "filed" for the purpose of Section 
18 of the Securities Exchange Act of 1934 ("Act") or otherwise 
subject to the liabilities of that section of the Act but shall 
be subject to all other provisions of the Act (however, see the 
Notes).

      

------------------------------
CUSIP No. 126349109                        
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Sterling Capital Management LLC
          56-2226389
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          North Carolina 
-----------------------------------------------------------------
------------

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:

5.  SOLE VOTING POWER
                   None
    ---------------------------------------------------------
6.  SHARED VOTING POWER
               4,844,755            
      ----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                    None
                            -------------------------------------
------------
8.  SHARED DISPOSITIVE POWER
             4,844,755              
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            4,844,755
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES   
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IA
-----------------------------------------------------------------
------------
------------------------------
CUSIP No. 126349109                                                
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Sterling MGT, Inc.
          56-2226391
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          North Carolina
-----------------------------------------------------------------
------------

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:

5.  SOLE VOTING POWER
                 None
---------------------------------------------------------
6.  SHARED VOTING POWER
         4,844,755
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                 None
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
         4,844,755             
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         4,844,755      
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARE 
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          CO
-----------------------------------------------------------------
------------
------------------------------
CUSIP No. 126349109
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Eduardo A. Brea
-----------------------------------------------------------------
------------2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]

-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:


5.  SOLE VOTING POWER
               0
---------------------------------------------------------
6.  SHARED VOTING POWER
         4,844,755
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                0
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
         4,844,755
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
          4,844,755
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES  
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IN
-----------------------------------------------------------------
------------
------------------------------
CUSIP No.  126349109                                              
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Alexander W. McAlister
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States
-----------------------------------------------------------------
------------
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:


5.  SOLE VOTING POWER
                 0
---------------------------------------------------------
6.  SHARED VOTING POWER
      4,844,755          
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                 0
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
      4,844,755          
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
      4,844,755    
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES  
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IN
-----------------------------------------------------------------
------------
------------------------------
CUSIP No. 126349109                                                
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          David M. Ralston
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:


5.  SOLE VOTING POWER
                 0
---------------------------------------------------------
6.  SHARED VOTING POWER
     4,844,755          
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                0
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
       4,844,755
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       4,844,755
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES  
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IN
-----------------------------------------------------------------
------------
------------------------------
CUSIP No. 126349109
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Brian R. Walton
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States
-----------------------------------------------------------------
------------
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:


5.  SOLE VOTING POWER
              0
---------------------------------------------------------
6.  SHARED VOTING POWER
       4,844,755
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
              0
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
       4,844,755
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
       4,844,755
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES  
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IN
-----------------------------------------------------------------
------------
------------------------------
CUSIP No. 126349109
------------------------------
-----------------------------------------------------------------
------------
1.  NAME OF REPORTING PERSON
     S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
          Mark Whalen
-----------------------------------------------------------------
------------
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP     

Not Applicable
(a) [  ]
(b) [  ]
-----------------------------------------------------------------
------------
3.  SEC USE ONLY

-----------------------------------------------------------------
------------
4.  CITIZENSHIP OR PLACE OF ORGANIZATION
          United States

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON 
WITH:


5.  SOLE VOTING POWER
                 0
---------------------------------------------------------
6.  SHARED VOTING POWER
        4,844,755
----------------------------------------------------------
7.  SOLE DISPOSITIVE POWER
                    0
-----------------------------------------------------------
8.  SHARED DISPOSITIVE POWER
         4,844,755
-----------------------------------------------------------------
------------
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         4,844,755
-----------------------------------------------------------------
------------
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES 
CERTAIN SHARES  
          Not Applicable
-----------------------------------------------------------------
------------
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          9.3%
-----------------------------------------------------------------
------------
12.  TYPE OF REPORTING PERSON     
          IN
-----------------------------------------------------------------
------------
Item 1(a)         Name of Issuer:

                        CSG Systems International Inc.

Item 1(b)         Address of Issuer's Principal Executive 
Offices:

7887 E. Belleview Avenue
Suite 1000
Englewood, Colorado  80111

Item 2(a)         Name of Person(s) Filing:

Sterling Capital Management LLC ("Sterling")
Sterling MGT, Inc.  ("Sterling Management")
Eduardo A. Brea
Alexander W. McAlister
David M. Ralston
Brian R. Walton
Mark Whalen                        

Item 2(b)         Address of Principal Business Office:

Sterling, Sterling Management, Mr. Brea, Mr. McAlister, Mr. 
Ralston, Mr. Walton and Mr. Whalen are all located at:      

4064 Colony Road, Suite 300
Charlotte, NC  28211 

Item 2(c)         Citizenship:

Sterling is a North Carolina limited liability company. 
Sterling Management is a North Carolina corporation.  
Mr. Brea, Mr. McAlister, Mr. Ralston, Mr. Walton and Mr. Whalen 
are U.S. citizens.

Item 2(d)  Title of Class of Securities:
Common Stock ($0.01 par value) (the "Stock")

Item 2(e)  CUSIP Number:
126349109

Item 3  Type of Person:

(e)  Sterling is an Investment Adviser registered under section 
203 of the Investment Advisers Act of 1940, as amended.

(g) Sterling Management is the Managing Member of Sterling.  Mr. 
Brea, Mr. McAlister, Mr. Ralston, Mr. Walton and Mr. Whalen are 
controlling shareholders of Sterling Management.  Sterling 
Management, Mr. Brea, Mr. McAlister, Mr. Ralston, Mr. Walton and 
Mr. Whalen are control persons under 17 C.F.R. 240.13d-
1(b)(1)(ii)(G).

Item 4  Ownership:

(a)  Amount beneficially owned: 

See Item 9 of Cover Pages.

(b)  Percent of class:

See Item 11 of Cover Pages.

(c)  Number of shares as to which such person has:

(i)  Sole power to vote or to direct the vote:

See Item 5 of Cover Pages.

(ii)  Shared power to vote or to direct the vote:

See Item 6 of Cover Pages

(iii)  Sole power to dispose or direct the disposition of:

See Item 7 of Cover Pages.

(iv)  Shared power to dispose or direct the disposition of:

See Item 8 of Cover Pages.

Item 5  Ownership of Five Percent or Less of a Class:

Not Applicable
      
Item 6  Ownership of More than Five Percent on Behalf of Another 
Person:

Sterling is a registered investment adviser whose clients have 
the right to receive or the power to direct the receipt of 
dividends from, or the proceeds from the sale of, the Stock.  
None of these clients to the knowledge of Sterling, Sterling 
Management, Mr. Brea, Mr. McAlister, Mr. Ralston, Mr. Walton or 
Mr. Whalen beneficially owns more than 5% of the Stock. 

Item 7

Identification and Classification of the Subsidiary Which 
Acquired the Security Being Reported on by the Parent Holding 
Company:

Sterling is an Investment Adviser registered under section 203 of 
the Investment Advisers Act of 1940, as amended.

Sterling Management is the Managing Member of Sterling.  Mr. 
Brea, Mr. McAlister, Mr. Ralston, Mr. Walton and Mr. Whalen are 
controlling shareholders of Sterling Management.

Item 8  Identification and Classification of Members of the 
Group:

Not Applicable

Item 9  Notice of Dissolution of Group:

Not Applicable

Item 10  Certification:

By signing below I certify that, to the best of my knowledge and 
belief, the securities referred to above were acquired and are 
held in the ordinary course of business and were not acquired and 
are not held for the purpose of or with the effect of changing or 
influencing the control of the issuer of the securities and were 
not acquired and are not held in connection with or as a 
participant in any transaction having that purpose or effect.


SIGNATURE

After reasonable inquiry and to the best of my knowledge and 
belief, I certify that the information set forth in this 
statement is true, complete and correct.

Date:  January 7, 2005

STERLING CAPITAL MANAGEMENT LLC 

By:  Sterling MGT, Inc.
Its Manager 

By:  /s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
--------------------------
Mark Whalen
President

STERLING MGT, INC.

By:  /s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
--------------------------
Mark Whalen
President

EDUARDO A. BREA

/s/ Kenneth R. Cotner, Attorney in Fact for Eduardo A. Brea
------------------------------

ALEXANDER W. MCALISTER

/s/ Kenneth R. Cotner, Attorney in Fact for Alexander W. 
McAlister
-------------------------------------

DAVID M. RALSTON

/s/ Kenneth R. Cotner, Attorney in Fact for David M. Ralston
-------------------------------------

BRIAN R. WALTON

/s/ Kenneth R. Cotner, Attorney in Fact for Brian R. Walton
-------------------------------------

MARK WHALEN

/s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
-------------------------------------


EXHIBIT INDEX


Exhibit 1

Joint Filing Agreement dated as of January 7, 2005 by and among 
Sterling 
Capital Management LLC, Sterling MGT, Inc., Eduardo A. Brea, 
Alexander W.
McAlister David M. Ralston, Brian R. Walton and Mark Whalen. 

Exhibit 1


JOINT FILING AGREEMENT

This will confirm the agreement by and between the undersigned 
that the Schedule 13G (the "Statement") to which this Agreement 
is attached is being filed on behalf of the persons listed below.  
Each of the persons listed hereby acknowledges that pursuant to 
Rule 13d-1(k) promulgated under the Securities Exchange Act of 
1934, as amended, each person on whose behalf the Statement is 
filed is responsible for the timely filing of such statement and 
any amendments thereto, and for the completeness and accuracy of 
the information concerning such person contained therein, and 
that such person is not responsible for the completeness or 
accuracy of the information concerning the other persons making 
the filing, unless such person knows or has reason to believe 
that such information is inaccurate. 

Dated:  January 7, 2005

STERLING CAPITAL MANAGEMENT LLC 

By:  Sterling MGT, Inc.
Its Manager 

By:  /s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
--------------------------
Mark Whalen
President

STERLING MGT, INC.

By:  /s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
--------------------------
Mark Whalen
President

EDUARDO A. BREA

/s/ Kenneth R. Cotner, Attorney in Fact for Eduardo A. Brea
------------------------------

ALEXANDER W. MCALISTER

/s/ Kenneth R. Cotner, Attorney in Fact for Alexander W. 
McAlister
-------------------------------------

DAVID M. RALSTON

/s/ Kenneth R. Cotner, Attorney in Fact for David M. Ralston
-------------------------------------

BRIAN R. WALTON

/s/ Kenneth R. Cotner, Attorney in Fact for Brian R. Walton
-------------------------------------

MARK WHALEN

/s/ Kenneth R. Cotner, Attorney in Fact for Mark Whalen
-------------------------------------