1. Name and Address of Reporting Person
   ABRAMSON, J. RICHARD
   7887 E. Belleview Avenue
   Suite 1000
   Englewood, CO 80111
   USA
2. Issuer Name and Ticker or Trading Symbol
   CSG Systems International, Inc. (CSGS)
3. IRS or Social Security Number of Reporting Person (Voluntary)
4. Statement for Month/Year
   2001
5. If Amendment, Date of Original (Month/Day/Year)
6. Relationship of Reporting Person(s) to Issuer (Check all applicable)
   ( ) Director                   ( ) 10% Owner
   ( ) Officer (give title below) (X) Other (specify below)
   Executive Vice President
7. Individual or Joint/Group Filing (Check Applicable Line)
   (X) Form filed by One Reporting Person
   ( ) Form filed by More than One Reporting Person

TABLE I -- Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

+---------------------------------+----------+-------------+-----------------------------+----------------+-----------+------------+
|1. Title of Security             |2. Trans- |3. Trans-    |4. Securities Acquired (A)   |5. Amount of    |6. Owner-  |7. Nature   |
|                                 |   action |   action    |   or Disposed of (D)        |   Securities   |   ship    |   of In-   |
|                                 |   Date   |   Code      |                             |   Beneficially |   Form:   |   direct   |
|                                 |          |             |                             |   Owned at     |   Direct  |   Bene-    |
|                                 |  (Month/ |             |                             |   End of       |   (D) or  |   ficial   |
|                                 |   Day/   |             +-----------+------+----------+   Year         |   Indirect|   Owner-   |
|                                 |   Year)  |             |Amount     |A/D   |Price     |                |   (I)     |   ship     |
+---------------------------------+----------+-------------+-----------+------+----------+----------------+-----------+------------+
                                                                                               





TABLE II -- Derivative Securities Acquired, Disposed of, or Beneficially Owned

+-------------+--------+----------+---------+-----------+---------------------+----------------+----------+--------+-------+-------+
|1.           |2.      |3.        |4.       |5.         |6.                   |7.              |8.        |9.      |10.    |11.    |
|             |        |          |         |           |                     |                |          |Number  |Owner- |       |
|             |        |          |         |           |                     |                |          |of      |ship   |       |
|             |        |          |         |           |                     |                |          |Deriv-  |Form of|       |
|             |        |          |         |           |                     |Title and Amount|          |ative   |Deriv- |       |
|             |        |          |         |           |                     |of Underlying   |          |Secur-  |ative  |Nature |
|             |Conver- |          |         |Number of  |                     |Securities      |          |ities   |Secur- |of     |
|             |sion or |          |         |Derivative |Date Exercisable     +-------+--------+          |Benefi- |ity:   |In-    |
|             |Exercise|          |         |Securities |and Expiration Date  |       |Amount  |          |cially  |Direct |direct |
|             |Price of|Transac-  |Transac- |Acquired(A)|(Month/Day/Year)     |       |or      |          |Owned   |(D) or |Bene-  |
|Title of     |Deriv-  |tion Date |tion Code|Disposed(D)+----------+----------+       |Number  |Price of  |at End  |In-    |ficial |
|Derivative   |ative   |(Month/   |         +-----+-----+Date Exer-|Expira-   |       |of      |Derivative|of      |direct |Owner- |
|Security     |Security|Day/Year) |         |(A)  |(D)  |cisable   |tion Date |Title  |Shares  |Security  |Year    |(I)    |ship   |
+-------------+--------+----------+---------+-----+-----+----------+----------+-------+--------+----------+--------+-------+-------+
                                                                                     
Stock Options  $34.43   12/14/2001 A         30000       12/14/2002 12/14/2011 Common  30000    $0.0000    30000    D
(Right to buy)                                                                 Stock   
Stock Options  $40.125                                              02/15/2010 Common                      100000   D
(Right to buy)                                                                 Stock
Stock Options  $47      01/17/2001 A         32873       01/17/2002 01/17/2011 Common  32873    $47.0000            D
(Right to buy)                                                                 Stock   
Stock Options  $47      01/17/2001 A         2127        01/17/2005 01/17/2011 Common  2127     $47.0000   35000    D
(Right to buy)                                                                 Stock
Stock Options  $49.1875                                             08/17/2010 Common                      100000   D
(Right to buy)                                                                 Stock

Explanation of Responses:


This stock option is exercisable in 4 equal installments.

This stock option is exercisable in 4 installments of 8,750; 8,750; 8,750 and
6,623, share respectively, beginning on January 17, 2002.



SIGNATURE OF REPORTING PERSON
/s/ J. RICHARD ABRAMSON

DATE
02/01/2002