<ARTICLE>                     5
<LEGEND>
     RESTATED FINANCIAL DATA SCHEDULE
This schedule contains summary financial information extracted from the
condensed statement of income for the quarter ending September 30, 1997 and the
condensed balance sheet as of September 30, 1997 and is qualified in its 
entirety by reference to such financial statements.
</LEGEND>
<CIK>                         0000926282
<NAME>                        ADTRAN, Inc.
<MULTIPLIER>                  1
<CURRENCY>                    U.S. Currency
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997
<PERIOD-END>                                   SEP-30-1997
<EXCHANGE-RATE>                                          1
<CASH>                                          27,082,564
<SECURITIES>                                    33,533,240
<RECEIVABLES>                                   38,579,530
<ALLOWANCES>                                      (900,000)
<INVENTORY>                                     46,618,219
<CURRENT-ASSETS>                               148,855,911
<PP&E>                                          83,373,251
<DEPRECIATION>                                 (18,982,515)
<TOTAL-ASSETS>                                 263,446,647
<CURRENT-LIABILITIES>                           13,191,515
<BONDS>                                         50,000,000
<PREFERRED-MANDATORY>                                    0
<PREFERRED>                                              0
<COMMON>                                           393,683
<OTHER-SE>                                     198,259,333
<TOTAL-LIABILITY-AND-EQUITY>                   263,446,647
<SALES>                                        190,934,367
<TOTAL-REVENUES>                               190,934,367
<CGS>                                           94,418,912
<TOTAL-COSTS>                                   94,418,912
<OTHER-EXPENSES>                                32,640,664
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                               1,272,649
<INCOME-PRETAX>                                 43,192,315
<INCOME-TAX>                                    15,549,233
<INCOME-CONTINUING>                             27,643,082
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                    27,643,082
<EPS-PRIMARY>                                         0.28
<EPS-DILUTED>                                         0.28