Washington, D. C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

       Date of Report (Date of earliest event reported): October 17, 2005

                                  ADTRAN, Inc.
             (Exact name of registrant as specified in its charter)

        Delaware                     0-24612                    63-0918200
(State of Incorporation)     (Commission file number)        (I.R.S. Employer
                                                         (Identification Number)

             901 Explorer Boulevard, Huntsville, Alabama 35806-2807
          (Address of principal executive offices, including zip code)

                                 (256) 963-8000
              (Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_|  Written communications pursuant to Rule 425 under the Securities Act (17
     CFR 230.425)

|_|  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR

|_|  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

|_|  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))

Item 2.02.  Results of Operations and Financial Condition.

On October 17, 2005, ADTRAN, Inc. announced its financial results for the fiscal
quarter ended September 30, 2005 and certain other information. ADTRAN also
announced that its Board of Directors declared a quarterly cash dividend. The
quarterly cash dividend is $0.09 per common share to be paid to holders of
record at the close of business on November 4, 2005. The ex-dividend date is
November 2, 2005 and the payment date is November 17, 2005. A copy of ADTRAN's
press release announcing such financial results and other information is
attached as Exhibit 99.1 hereto and incorporated by reference herein.

Item 9.01.  Financial Statements and Exhibits.

               (c)  Exhibits.

               The following exhibit is furnished as part of this Current Report
               on Form 8-K.

Exhibit Number            Description
--------------            -----------
          99.1            Press Release dated October 17, 2005


     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized on October 17, 2005.

                                     ADTRAN, Inc.

                                     By: /s/ James E. Matthews
                                         James E. Matthews
                                         Senior Vice President - Finance,
                                         Chief Financial Officer and Treasurer

                                  EXHIBIT INDEX

Exhibit Number            Description
--------------            -----------
          99.1            Press Release dated October 17, 2005