<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q
FOR THE PERIOD ENDED JUNE 28, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0001002531
<NAME> TOLLGRADE COMMUNICATIONS, INC.
       
                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-28-1997
<CASH>                                       7,035,725
<SECURITIES>                                13,556,808
<RECEIVABLES>                                5,954,472
<ALLOWANCES>                                    50,000
<INVENTORY>                                  8,289,566
<CURRENT-ASSETS>                            35,292,680
<PP&E>                                       4,805,490
<DEPRECIATION>                               1,946,659
<TOTAL-ASSETS>                              38,321,258
<CURRENT-LIABILITIES>                        4,664,842
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     1,138,309
<OTHER-SE>                                  32,349,652
<TOTAL-LIABILITY-AND-EQUITY>                38,321,258
<SALES>                                     20,534,431
<TOTAL-REVENUES>                            20,734,431
<CGS>                                        9,222,176
<TOTAL-COSTS>                                9,243,766
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                50,000
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                              5,117,006
<INCOME-TAX>                                 1,904,252
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 3,212,754
<EPS-PRIMARY>                                     0.54
<EPS-DILUTED>                                     0.54