<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. <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