EXHIBIT 11

TELLABS, INC.

COMPUTATION OF PER SHARE EARNINGS

In millions, except per share amounts

	First Quarter
	4/3/09		03/28/08
Numerator:
Net earnings	$	6.5	$	16.6
Denominator:
Denominator for basic earnings per share -
Weighted average shares outstanding		395.8		407.9
Effect of dilutive securities:
Stock options and awards		0.8		1.0
Denominator for diluted earnings per share -
Adjusted weighted average shares outstanding and assumed conversions		396.6		408.9
Net earnings per share – basic	$	0.02	$	0.04
Net earnings per share – diluted	$	0.02	$	0.04

The number of anti-dilutive securities excluded from the weighted average shares outstanding computation was 32.3 million in the first quarter of 2009 and 32.7 million in the first quarter of 2008.