LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned's hereby makes,
constitutes and appoints Michael Foliano, Amy Moss, and
Erika Huber as the undersigned's true and lawful attorney-in-fact,
with full power and authority as hereinafter described on behalf
of and in the name, place and stead of the undersigned to:

(1) prepare, execute, acknowledge, deliver and file
Forms 3, 4, and 5 (including any amendments thereto) with respect
to the securities of ADTRAN, Inc.,a Delaware corporation
(the "Company"), with the United States Securities and Exchange
Commission, any national securities exchanges and the Company, as
considered necessary or advisable under Section 16(a) of the
Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time
(the "Exchange Act");

(2) seek or obtain, as the undersigned's representative and on
the undersigned's behalf, information on transactions in the
Company's securities from any third party, including brokers,
employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any
such information to the undersigned and approves and ratifies
any such release of information; and

(3) perform any and all other acts which in the discretion of
such attorney in-fact are necessary or desirable for and on
behalf of the undersigned in connection with the foregoing.

The undersigned acknowledges that:

(I) this Power of Attorney authorizes, but does not require,
such attorney-in-fact to act in their discretion on information
provided to such attorney-in-fact without independent
verification of such information;

(2) any documents prepared and/or executed by such
attorney-in-fact on behalf of the undersigned pursuant to this
Power of Attorney will be in such form and will contain such
information and disclosure as such attorney-in-fact, in his or
her discretion, deems necessary or desirable;

(3) neither the Company nor such attorney-in-fact assumes
(i) any liability for the undersigned's responsibility to
comply with the requirements of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with
such requirements, or (iii) any obligation or liability of the
undersigned for profit disgorgement under Section 16(b) of the
Exchange Act; and

(4) this Power of Attorney does not relieve the undersigned
from responsibility for compliance with the undersigned's
obligations under the Exchange Act, including without limitation
the reporting requirements under Section 16 of the Exchange Act.

The undersigned hereby gives and grants the foregoing
attorney-in-fact full power and authority to do and perform all
 and every act and thing whatsoever requisite, necessary or
appropriate to be done in and about the foregoing matters as fully
to all intents and purposes as the undersigned might or could do
if present, hereby ratifying all that such attorney-in-fact of,
for and on behalf of the undersigned, shall lawfully do or cause
to be done by virtue of this Limited Power of Attorney.

This Power of Attorney shall remain in full force and effect
until revoked by the undersigned in a signed writing delivered
to such attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be executed as of this 11th day of
September 2019

/s/Daniel T. Whalen
Print Name: Daniel T. Whalen