EXHIBIT 12.10

CSG Systems International, Inc.

Ratio of Earnings to Fixed Charges

(in thousands, except ratios)

	Year Ended December 31, 2005
Income from continuing operations before income taxes	$	72,961
Fixed Charges:
Interest on long-term and short-term debt including amortization of debt expense		7,537
Interest element of rentals		3,718
Total fixed charges		11,255
Earnings before income taxes and fixed charges	$	84,216
Ratio of earnings to fixed charges		7.48