<ARTICLE>                     5
<LEGEND>
     RESTATED FINANCIAL DATA SCHEDULE
This schedule contains summary financial information extracted from the 
condensed statement of income for the year ended March 31, 1997 and the 
condensed balance sheet as of March 31, 1997 and is qualified in its entirety
by reference to such financial statements.
</LEGEND>
<CIK>                         0000926282                     
<NAME>                        ADTRAN, Inc.
<MULTIPLIER>                                   1
<CURRENCY>                                     U.S. Dollar
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997
<PERIOD-END>                                   MAR-31-1997
<EXCHANGE-RATE>                                         1
<CASH>                                         49,542,844
<SECURITIES>                                   30,550,210
<RECEIVABLES>                                  33,575,563
<ALLOWANCES>                                     (870,842)
<INVENTORY>                                    48,082,345
<CURRENT-ASSETS>                              164,739,843
<PP&E>                                         75,130,234
<DEPRECIATION>                                (15,350,751)
<TOTAL-ASSETS>                                224,519,326
<CURRENT-LIABILITIES>                          20,295,962
<BONDS>                                        20,000,000
<PREFERRED-MANDATORY>                                   0
<PREFERRED>                                             0
<COMMON>                                          392,027
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<TOTAL-LIABILITY-AND-EQUITY>                  224,519,326
<SALES>                                        61,230,184
<TOTAL-REVENUES>                               61,230,184
<CGS>                                          29,438,797
<TOTAL-COSTS>                                  29,438,797
<OTHER-EXPENSES>                               10,537,516
<LOSS-PROVISION>                                        0
<INTEREST-EXPENSE>                                242,534
<INCOME-PRETAX>                                14,878,545
<INCOME-TAX>                                    5,356,277
<INCOME-CONTINUING>                             9,522,269
<DISCONTINUED>                                          0
<EXTRAORDINARY>                                         0
<CHANGES>                                               0
<NET-INCOME>                                    9,522,269
<EPS-PRIMARY>                                        0.25
<EPS-DILUTED>                                        0.24