POWER OF ATTORNEY

Know all by these present, that the undersigned hereby constitutes and appoints
Joseph T. Ruble and Peter Kalan as the undersigned's true and lawful attorneys-
in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned's
	capacity as a reporting person pursuant to Section 16 of the Securities
	Exchange Act of 1934, as amended (the "Exchange Act"), and the rules
	thereunder of CSG Systems International, Inc. (the "Company"), Forms 3,
	4 and 5 in accordance with Section 16(a) of the Exchange Act;
(2)	do and perform any and all acts for and on behalf of the undersigned
	which may be necessary or desirable to complete and execute any such
	Form 3, 4 or 5 and timely file such form with the United States
	Securities and Exchange Commission and stock exchange or similar
	authority; and
(3)	take any other action of any type whatsoever in connection with the
	foregoing which, in the opinion of any of such attorneys-in-fact, may
	be of benefit to, in the best interest of, or legally required by, the
	undersigned, it being understood that the documents executed by any of
	such attorneys-in-fact on behalf of the undersigned pursuant to this
	Power of Attorney shall be in such form and shall contain such terms
	and conditions as any of such attorneys-in-fact may approve in the
	discretion of any of such attorneys-in-fact.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might
or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that any of such attorneys-in-
fact, or the substitute or substitutes of any of such attorneys-in-fact, shall
lawfully do or cause to be done by virtue of this Power of Attorney and the
rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned's responsibilities to comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 3rd day of September, 2002.

Signature:	JANICE OBUCHOWSKI /S/
Name:		Janice Obuchowski