Exhibit (a)(1)(D)

                 EMAIL COMMUNICATION TO ELIGIBLE OPTION HOLDERS
                             DATED JANUARY 28, 2002

To:      ADTRAN Eligible Option Holders
From:    ADTRAN, Inc.
Date:    January 28, 2002
Re:      IMPORTANT:  ADTRAN Stock Option Exchange Offer

We are pleased to announce that ADTRAN is launching an important stock option
exchange program for certain eligible options granted under our stock incentive
plans. Attached to this email message is important information about the stock
option exchange offer. The attachments consist of the following documents:

1.       Letter to ADTRAN Eligible Option Holders
2.       Offer to Exchange dated January 28, 2002
3.       Election Form Concerning Exchange of Stock Options
4.       Form of Notice of Withdrawal

We urge you to read each of these documents carefully. If you would like a paper
copy of any of these documents to be delivered to you, please contact Pat Gill
at (256) 963-8220, email: pat.gill@adtran.com.