POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 11th day of March, 1997.
/s/ MARK C. SMITH
------------------------
MARK C. SMITH
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 11th day of March, 1997.
/s/Lonnie S.McMillian
---------------------
Lonnie S. McMillian
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 12th day of March, 1997.
/s/Howard A. Thrailkill
-----------------------
Howard A. Thrailkill
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 6th day of March, 1997.
/s/John R. Cooper
-----------------
John R. Cooper
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 6th day of March, 1997.
/s/Roy J. Nichols
----------------
Roy J. Nichols
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 21st day of February, 1997.
/s/William L.Marks
------------------
William L. Marks
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 21st day of February, 1997.
/s/ O.Gene Gabbard
------------------
O. Gene Gabbard
POWER OF ATTORNEY
KNOW ALL MEN BY THESE PRESENTS, that the undersigned constitutes and
appoints Mark C. Smith, Lonnie S. McMillian 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, 1996, and any and all amendments thereto, 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 Security 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 21st day of February, 1997.
/s/James L. North
-----------------
James L. North