Exhibit 24
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ Mark C. Smith
-----------------
Mark C. Smith
Chairman of the Board, Chief
Executive Officer and Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ Howard A. Thrailkill
------------------------
Howard A. Thrailkill
President, Chief Operating Officer,
and Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ Lonnie S. McMillian
-----------------------
Lonnie S. McMillian
Senior Vice President, Secretary,
and Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ W. Frank Blount
-------------------
W. Frank Blount
Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ William L. Marks
--------------------
William L. Marks
Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ Roy J. Nichols
------------------
Roy J. Nichols
Director
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith and John R. Cooper, and each of them, his true and lawful
attorneys-in-fact and agents, with full power of substitution, for him and in
his name, place and stead, in any and all capacities, to sign the Annual Report
on Form 10-K of ADTRAN, Inc. for the fiscal year ended December 31, 2000, and
any and all amendments thereto, and other documents in connection therewith and
to file the same, with all exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission and the National
Association of Securities Dealers, Inc., granting unto said attorneys-in-fact
and agents, and each of them, full power and authority to do and perform each
and every act and thing requisite or necessary to be done, as fully to all
intents and purposes as he might or could do in person, hereby ratifying and
confirming all that said attorneys-in-fact and agents or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
This 22nd day of March, 2001.
/s/ James L. North
------------------
James L. North
Director