<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
FOR THE PERIOD ENDED 6/26/99 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0001002531
<NAME> TOLLGRADE COMMUNICATIONS, INC.
<MULTIPLIER> 1

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-START>                             MAR-28-1999
<PERIOD-END>                               JUN-26-1999
<CASH>                                       9,666,494
<SECURITIES>                                12,073,738
<RECEIVABLES>                               12,028,872
<ALLOWANCES>                                   198,801
<INVENTORY>                                 14,875,931
<CURRENT-ASSETS>                            48,091,953
<PP&E>                                       7,613,021
<DEPRECIATION>                               4,088,543
<TOTAL-ASSETS>                              53,408,726
<CURRENT-LIABILITIES>                        4,702,258
<BONDS>                                              0
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<OTHER-SE>                                  47,504,505
<TOTAL-LIABILITY-AND-EQUITY>                53,408,726
<SALES>                                     14,269,719
<TOTAL-REVENUES>                            14,269,719
<CGS>                                        5,902,774
<TOTAL-COSTS>                                5,902,774
<OTHER-EXPENSES>                                     0
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<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              3,713,034
<INCOME-TAX>                                 1,339,855
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<NET-INCOME>                                 2,373,179
<EPS-BASIC>                                       0.41
<EPS-DILUTED>                                     0.41