**EXHIBIT11**

**TELLABS, INC.**

**COMPUTATION OF PER SHARE EARNINGS**

In millions,except per share amounts
| ** **                                                            | ** ** | **Second Quarter** | ** ** | **Six Months** |
|-----------------------------------------------------------------------|------------|-------------------------|------------|---------------------|
| ** **                                                            | ** ** | **06/30/06**            | ** ** | **07/1/05**         | ** ** | **06/30/06** | ** ** | **07/1/05** | ** ** |
| Numerator:                                                            |       |                    |       |                |   |   |   |   |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Net earnings                                                          |       | $                       | 53.5       |                | $ | 41.1 |   | $ | 105.9 |   | $ | 41.8 |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Denominator:                                                          |       |                    |       |                |   |   |   |   |   |
| Denominator for basic  earnings per share —                      |       |                    |       |                |   |   |   |   |   |
| Weighted average  shares outstanding                                  |       | 447.7                   |       | 447.7               |   | 448.8 |   | 451.8 |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Effect of dilutive  securities:                                       |       |                    |       |                |   |   |   |   |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Employee stock options  and awards                                    |       | 10.8                    |       | 3.7                 |   | 10.8 |   | 3.4 |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Denominator for diluted  earnings per share —                    |       |                    |       |                |   |   |   |   |   |
| Adjusted  weighted average shares outstanding and assumed conversions |       | 458.5                   |       | 451.4               |   | 459.6 |   | 455.2 |   |
|                                                                  |       |                    |       |                |   |   |   |   |   |
| Net earnings per share —  basic                                  |       | $                       | 0.12       |                | $ | 0.09 |   | $ | 0.24 |   | $ | 0.09 |   |
| Net earnings per share — diluted                                 |       | $                       | 0.12       |                | $ | 0.09 |   | $ | 0.23 |   | $ | 0.09 |   |

 

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