EXHIBIT 11

TELLABS, INC.

COMPUTATION OF PER SHARE EARNINGS

In millions, except per share amounts

	Third Quarter				Nine Months
	09/28/07		09/29/06		09/28/07		09/29/06
Numerator:
Net earnings	$	3.6	$	59.1	$	58.7	$	165.0
Denominator:
Denominator for basic earnings per share -
Weighted average shares outstanding		439.2		445.5		438.5		447.7
Effect of dilutive securities:
Stock options and awards		5.3		5.7		5.3		9.2
Denominator for diluted earnings per share -
Adjusted weighted average shares outstanding and assumed conversions		444.5		451.2		443.8		456.9
Net earnings per share – basic	$	0.01	$	0.13	$	0.13	$	0.37
Net earnings per share – diluted	$	0.01	$	0.13	$	0.13	$	0.36