LIMITED POWER OF ATTORNEY
FOR SECTION 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned hereby makes, constitutes and
appoints each of Michael Foliano, Dana Crim, Dan Ragsdale, Kevin Berg and Erika
Huber, signing singly, 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 Holdings, Inc.,
a Delaware corporation (the "Company"), with the United States Securities and
Exchange Commission (the "SEC") or any national securities exchanges or similar
authority, 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:
(1) this Limited Power of Attorney (this "Power of Attorney") authorizes, but
does not require, each such attorney-in-fact to act in his or her discretion on
information provided to such attorney-in-fact without independent verification
of such information;
(2) any documents prepared and/or executed by each 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) none of the Company and such attorneys-in-fact assume (i) any liability for
the undersigned's responsibility to comply with the requirements of Section 16
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 each 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 each such attorney-in-fact of, for and
on behalf of the undersigned, shall lawfully do or cause to be done by virtue of
this Power of Attorney.
This Power of Attorney is governed by Alabama law.
Any reproduced copy of this signed original shall be deemed to be an original of
this Power of Attorney.
This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file Forms 3, 4, and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.  The undersigned shall have the right to revoke
this Power of Attorney at any time.
By signing below, the undersigned does hereby revoke any and all other power of
attorney documents previously and otherwise executed in connection with the
undersigned's obligations as a director of the Company to prepare and file Forms
3, 4 and 5, or other forms or reports, or any amendments thereto, with the SEC
or any national securities exchanges or similar authority, pursuant to Section
16(a) of the Exchange Act. The undersigned hereby gives notice to all who have
received, relied on or acted upon such previously executed power of attorney
documents and all other interested parties that the undersigned withdraws every
power and authority thereby given and declares such power of attorney documents
null and void and of no further force or effect.
IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 8th day of July 2022.

/s/ Kathryn A. Walker
Name: Kathryn A. Walker