<TABLE> <S> <C>
<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.
</LEGEND>
<CIK> 0001002531
<NAME> TOLLGRADE COMMUNICATIONS, INC.
<S> <C>
<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
0
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
</TABLE>