Exhibit 7.1

TELEFONOS DE MEXICO, S.A.B. DE C.V. AND SUBSIDIARIES

RATIOS OF EARNINGS TO FIXED CHARGES

Thousands of Mexican pesos with purchasing power at December 31, 2006



|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|-------------------------------------------------------------------------- |  | ---------- | - |  | ---------- | - |  | ---------- | - |  | ---------- | - |  | ---------- | -
|CONCEPT                                                                    |  | 2002       |   |  | 2003       |   |  | 2004       |   |  | 2005       |   |  | 2006       |  
|Mexican FRS:                                                               |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Income before income tax and employee profit sharing                       |  | 38,980,153 |   |  | 40,113,083 |   |  | 47,458,875 |   |  | 46,194,093 |   |  | 44,664,546 |  
|                                                                           |  |            |   |  |           
|Plus:                                                                      |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Fixed charges:                                                             |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Interest expense                                                           |  | 7,109,333  |   |  | 6,246,289  |   |  | 6,597,709  |   |  | 8,060,066  |   |  | 8,088,002  |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Earnings under Mexican FRS                                                 |  | 46,089,486 |   |  | 46,359,372 |   |  | 54,056,584 |   |  | 54,254,159 |   |  | 52,752,548 |  
|                                                                           |  |            |   |  |           
|Less:                                                                      |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Mexican FRS:                                                               |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Employee profit sharing                                                    |  | 3,530,553  |   |  | 2,923,725  |   |  | 3,105,142  |   |  | 3,049,252  |   |  | 3,001,692  |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|                                                                           |  | 42,558,933 |   |  | 43,435,647 |   |  | 50,951,442 |   |  | 51,204,907 |   |  | 49,750,856 |  
|Inflation adjustment (*)                                                   |  |            |   |  |            |   |  | (1,162,772 | ) |  | (1,168,557 | ) |  |            |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|                                                                           |  | 42,558,933 |   |  | 43,435,647 |   |  | 49,788,670 |   |  | 50,036,350 |   |  | 49,750,856 |  
|                                                                           |  |            |   |  |           
|Plus:                                                                      |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|U.S. GAAP adjustments, net:                                                |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Total U.S. GAAP adjustments, net                                           |  | (2,008,437 | ) |  | (840,376   | ) |  | 429,419    |   |  | (2,054,810 | ) |  | (1,458,043 | )
|Less:                                                                      |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Deferred income tax                                                        |  | (313,258   | ) |  | (289,071   | ) |  | 1,976,490  |   |  | 141,685    |   |  | (452,425   | )
|Interest capitalized                                                       |  | 413,907    |   |  | 111,425    |   |  | 58,411     |   |  | 108,591    |   |  | 112,967    |  
|Depreciation of capitalized interest                                       |  | (531,918   | ) |  | (621,490   | ) |  | (602,171   | ) |  | (593,710   | ) |  | (467,134   | )
|Equity in result of affiliates                                             |  |            |   |  |            |   |  |            |   |  | 260,574    |   |  | 37,427     |  
|Minority interest                                                          |  |            |   |  |            |   |  | 29,078     |   |  | (96,385    | ) |  | 453,084    |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|U.S. GAAP adjustments without deferred income tax and capitalized interest |  | (1,577,168 | ) |  | (41,240    | ) |  | (1,032,389 | ) |  | (1,875,565 | ) |  | (1,141,962 | )
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Earnings under U.S. GAAP                                                   |  | 40,981,765 |   |  | 43,394,407 |   |  | 49,919,053 |   |  | 49,329,342 |   |  | 48,608,894 |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Fixed charges under U.S. GAAP:                                             |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Interest expense                                                           |  | 6,695,426  |   |  | 6,134,864  |   |  | 6,539,298  |   |  | 7,951,475  |   |  | 7,975,035  |  
|Plus:                                                                      |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Interest capitalized                                                       |  | 413,907    |   |  | 111,425    |   |  | 58,411     |   |  | 108,591    |   |  | 112,967    |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|Fixed charges under U.S. GAAP                                              |  | 7,109,333  |   |  | 6,246,289  |   |  | 6,597,709  |   |  | 8,060,066  |   |  | 8,088,002  |  
|                                                                           |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|RATIOS OF EARNINGS TO FIXED CHARGES:                                       |  |            |   |  |            |   |  |            |   |  |            |   |  |            |  
|                                                                           |  |            |   |  |           
|Mexican FRS                                                                |  | 6.5        |   |  | 7.4        |   |  | 8.2        |   |  | 6.7        |   |  | 6.5        |  
|U.S. GAAP                                                                  |  | 5.8        |   |  | 6.9        |   |  | 7.6        |   |  | 6.1        |   |  | 6.0        |  

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|(*) | Adjustment that reverses the restatement of prior periods into constant pesos as of December 31, 2006, using the TELMEX weighted average inflation factor of 1.0648 (see Note 1
II c), and restates such prior periods into constant pesos as of December 31, 2005 using the Mexican only inflation factor of 1.0405, in order to comply with current requirements of Regulation S-X.
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