CSG Systems International (CSGS) 10-Q 2006 Q2 Quarterly report

EXHIBIT 12.10

CSG Systems International, Inc.

Ratio of Earnings to Fixed Charges

(in thousands, except ratio)

	Six Months Ended June 30, 2006 (unaudited)
Income from continuing operations before income taxes	$	50,100
Fixed Charges:
Interest on long-term and short-term debt including amortization of debt expense		3,788
Interest element of rentals		1,734
Total fixed charges		5,522
Earnings before income taxes and fixed charges	$	55,622
Ratio of earnings to fixed charges		10.07