<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
FOR THE SECOND QUARTER ENDED JULY 1, 2000, AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.

<CIK> 0001002531
<NAME> TOLLGRADE COMMUNICATIONS, INC.

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             APR-02-2000
<PERIOD-END>                               JUL-01-2000
<CASH>                                      20,773,332
<SECURITIES>                                24,666,179
<RECEIVABLES>                               12,677,439
<ALLOWANCES>                                   177,811
<INVENTORY>                                 21,635,260
<CURRENT-ASSETS>                            86,667,884
<PP&E>                                      11,294,917
<DEPRECIATION>                               5,586,999
<TOTAL-ASSETS>                              96,021,437
<CURRENT-LIABILITIES>                        6,256,719
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     2,606,112
<OTHER-SE>                                  87,148,656
<TOTAL-LIABILITY-AND-EQUITY>                96,021,437
<SALES>                                     29,666,710
<TOTAL-REVENUES>                            29,666,710
<CGS>                                       11,413,382
<TOTAL-COSTS>                               11,413,382
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                             11,177,879
<INCOME-TAX>                                 4,024,000
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 7,153,879
<EPS-BASIC>                                        .57
<EPS-DILUTED>                                      .54