EXHIBIT 12-a

ADC Telecommunications Ratio of
Earnings to Fixed Charges

|                                                                 | Fiscal Year Ended October 31
|---------------------------------------------------------------- | ----------------------------
|
|Earnings
         Income (loss) before income taxes              |                             
|ADD
         + Adjustment for minority interests in consolidated |                             
|subsidiaries or income or loss from equity investees             |                             
|+ Fixed Charges                                                  |                             
|+ Distributed income of equity investees                         |                             
|+ ADC's share of pre-tax losses of equity investees for          |                             
|which charges arising from guarantees are included in            |                             
|fixed charges                                                    |                             
|                                                                 |                             
|Sub-total                                                        |                             
|                                                                 |                             
|                                                                 |                             
|SUBTRACT                                                         |                             
|- Interest Capitalized                                           |                             
|- Preference security dividend requirements of                   |                             
|consolidated subsidiaries                                        |                             
|- Minority interest in pre-tax income of subsidiaries            |                             
|that have not incurred fixed charges                             |                             
|                                                                 |                             
|Sub-total                                                        |                             
|                                                                 |                             
|Total Earnings                                                   |                             
|                                                                 |                             
|                                                                 |                             
|                                                                 |                             
|Fixed Charges                                                    |                             
|Interest Expensed                                                |                             
|Interest Capitalized                                             |                             
|Amortized premiums, discounts & capitalized expenses             |                             
|related to indebtedness                                          |                             
|Interest Within Rental Expense                                   |                             
|Preference Security Dividend Requirements                        |                             
|                                                                 |                             
|Total Fixed Charges                                              |                             
|                                                                 |                             
|Ratio of Earnings to Fixed Charges                               |                             
|Deficiency of Earnings to Fixed Charges                          |                             

__________

---