THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

ADTRAN, Inc. (ADTN)

3/31/2006 Proxy Information

Mark C. Smith is one of the co-founders of ADTRAN, Inc. and has served as Chairman since the commencement of operations in January 1986. He also served as Chief Executive Officer until September 2005 and President from 1986 until November 1995.

James L. North, a partner in the law firm of James L. North & Associates, is our director emeritus and as of December 31, 2005, beneficially owned 91,000 shares of our common stock. We paid James L. North & Associates fees of $121,045 for legal services rendered to us during 2005. All bills for services rendered by James L. North & Associates are reviewed and approved by our Chief Financial Officer. We believe that the fees for these services are reasonable and comparable to those charged by other firms for services rendered to us.

Richard A. Anderson, our former director, is the Vice Chairman – Planning and Administration of BellSouth Corporation. For fiscal year 2005, we received payments, directly and indirectly, from BellSouth in the amount of approximately $21.5 million for products supplied to BellSouth. We also paid to BellSouth $471,555 for services provided by BellSouth to us. These payments to and from BellSouth are made in the normal course of business and we believe that they are reasonable.

7/19/2005 8K Information

Mr. Smith is one of the co-founders of ADTRAN, Inc. and has served as Chairman since the commencement of operations in January 1986. He also served as Chief Executive Officer until September 2005 and President from 1986 until November 1995.

4/5/2005 Proxy Information

James L. North, a partner in the law firm of James L. North & Associates, is our director emeritus and as of December 31, 2004, beneficially owned 86,000 shares of our common stock. We paid James L. North & Associates fees of $121,060 for legal services rendered to us during 2004. All bills for services rendered by James L. North & Associates are reviewed and approved by our Chief Financial Officer. We believe that the fees for such services are reasonable and comparable to those charged by other firms for services rendered to us.

Richard A. Anderson, one of our directors, is the Vice Chairman – Planning and Administration of BellSouth Corporation. For fiscal year 2004, we received payments, directly and indirectly, from BellSouth in the amount of approximately $25.3 million for products supplied to BellSouth. We also paid to BellSouth $619,478 for services provided by BellSouth to us. These payments to and from BellSouth are made in the normal course of business and we believe that they are reasonable.

3/12/2004 Proxy Information

James L. North, a partner in the law firm of James L. North & Associates, is one of our directors emeritus and as of December 31, 2003, beneficially owned 191,000 shares of our common stock. We paid James L. North & Associates fees of $120,000 for legal services rendered to us during 2003. All bills for services rendered by James L. North & Associates are reviewed and approved by our Chief Financial Officer. We believe that the fees for such services are comparable to those charged by other firms for services rendered to us.

For fiscal year 2003, we received payments, directly and indirectly, from BellSouth Corporation in the amount of approximately $22.8 million for products supplied to BellSouth. We also paid to BellSouth $566,938 for services provided by BellSouth to us. Richard A. Anderson, one of our directors, is the President – Customer Markets of BellSout.

Lonnie S. McMillian is one of the co-founders of ADTRAN, Inc. and served as Secretary from 1986 to December 2002 and as Senior Vice President from January 1996 until his retirement in June 2001. Mr. McMillian was Vice President of Engineering at ADTRAN from January 1986 until August 1996 and Treasurer from January 1986 to January 1997.

3/10/2003 Proxy Information

James L. North, a partner in the law firm of James L. North & Associates, is one of our directors emeritus and as of December 31, 2002, beneficially owned 146,750 shares of our common stock. We paid James L. North & Associates fees of $120,000 for legal services rendered to us during 2002. All bills for services rendered by James L. North & Associates are reviewed and approved by our Chief Financial Officer. We believe that the fees for such services are comparable to those charged by other firms for services rendered to us.

For fiscal year 2002, we received payments, directly and indirectly, from BellSouth Corporation in the amount of approximately $31.1 million for products supplied to BellSouth. We also paid $409,419 to BellSouth for services provided by BellSouth to us. Richard A. Anderson, one of our directors, is the President—Customer Markets of BellSouth.

Lonnie S. McMillian is a co-founder of ADTRAN, Inc.