<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
FOR THE FIRST QUARTER ENDED APRIL 1, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<RESTATED>
<CIK> 0001002531
<NAME> TOLLGRADE COMMUNICATIONS, INC.

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               APR-01-2000
<CASH>                                      18,065,984
<SECURITIES>                                16,915,641
<RECEIVABLES>                               11,711,244
<ALLOWANCES>                                   177,811
<INVENTORY>                                 20,159,241
<CURRENT-ASSETS>                            68,185,686
<PP&E>                                       5,518,381
<DEPRECIATION>                                 375,036
<TOTAL-ASSETS>                              80,096,221
<CURRENT-LIABILITIES>                       10,315,340
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     2,548,183
<OTHER-SE>                                  67,222,748
<TOTAL-LIABILITY-AND-EQUITY>                80,096,221
<SALES>                                     22,417,535
<TOTAL-REVENUES>                            22,417,535
<CGS>                                        8,371,660
<TOTAL-COSTS>                                8,371,660
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              8,163,614
<INCOME-TAX>                                 2,939,000
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 5,224,614
<EPS-BASIC>                                        .43
<EPS-DILUTED>                                      .39