McKenna Long & Aldridge LLP
303 Peachtree Street, Suite 5300
Atlanta, Georgia 30308
September 19, 2007
VIA EDGAR AND FACSIMILE (202) 772-9368
United States Securities and Exchange Commission
Division of Corporation Finance
100 F Street, NE
Washington, D.C. 20549
Attn: Mr. Craig Slivka
Re: SEC Comment Letter dated August 21, 2007
Registrant: ADTRAN, Inc.
Definitive Schedule 14A
Filed March 30, 2007
File No. 0-24612
Dear Mr. Slivka:
This is to confirm our telephone conversation of September 19, 2007 concerning the above-referenced Comment Letter. We expect to be able to file ADTRAN's responses not later than the close of business on October 5, 2007.
If you have any questions, please contact me.
Very truly yours,
/s/ Stacy S. Ingram
Stacy S. Ingram
cc: Thomas R. Stanton
James E. Matthews
Thomas Wardell
