ADTRAN INC
10-Q, 1997-05-09
TELEPHONE & TELEGRAPH APPARATUS
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                        SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C.  20549
                                    FORM 10-Q

            [X]  Quarterly  Report  Pursuant  to Section 13 or 15(d)
               of the Securities Exchange Act of 1934 For the Quarterly
                          Period Ended March 31, 1997

                                        OR
           [  ]  Transition  Report  Pursuant  to  Section  13 or  15(d)
                of the Securities Exchange Act of 1934 For the Transition
                          Period from ______ to ______

                        Commission File Number 0-24612

                                  ADTRAN, INC.
              (Exact name of Registrant as specified in its charter)

         Delaware                                                 63-0918200
  (State of Incorporation)                                   (I.R.S. Employer
                                                           Identification No.)

                901 Explorer Boulevard, Huntsville, Alabama 35806-2807
             (Address of principal executive offices, including zip code)

                                   (205) 963-8000
                (Registrant's telephone number, including area code)

                                 ---------------

     Indicate  by check mark  whether the  Registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934 during the  preceding  twelve  months (or for such shorter  period that the
Registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days. Yes x No

Indicate the number of shares  outstanding  of each of the  issuer's  classes of
Common Stock as of the latest practicable date:

Class                                             Outstanding at April 30, 1997
Common Stock, $.01 Par Value                          39,209,139 shares

                               Page 1 of 16
                      Index of Exhibits on Page 14
<PAGE>



                                 ADTRAN, INC.
                Quarterly Report on Form 10-Q For the Quarter
                           Ended March 31, 1997


                              Table of Contents

Item Number          PART I. FINANCIAL INFORMATION                  Page Number

1                Financial Statements:

                 Condensed Balance Sheets as of December 31, 1996
                 and March 31, 1997                                        3

                 Condensed Statements of Income for the three
                 months ended March 31, 1996 and 1997                      4

                 Condensed Statements of Cash Flows for the three
                 months ended March 31, 1996 and 1997                      5

                 Notes to Condensed Financial Statements                   6

2                Management's Discussion and Analysis of
                 Financial Condition and Results of Operations             8

                    PART II. OTHER INFORMATION

6                Exhibits and Reports on Form 8-K                         12

                                                  SIGNATURE               13

                                              INDEX OF EXHIBITS           14





<PAGE>

                            PART I.  FINANCIAL INFORMATION
Item 1.  Financial Statements
                                    ADTRAN, INC.
                             CONDENSED BALANCE SHEETS
<TABLE>
<CAPTION>
                                      ASSETS
                                                  December 31,       March 31,
                                                     1996              1997
                                                                    (Unaudited)
<S>                                              <C>               <C>
Current assets:
     Cash and cash equivalents................   $44,839,131       $49,542,844
     Short-term investments...................    32,555,930        30,550,210
     Accounts receivable, less allowance for
       doubtful accounts of $872,724 and
       $870,842 in 1996 and 1997,
       respectively........................       33,825,560        32,704,720
     Other receivables.......................        362,578           295,595
     Inventory...............................     40,792,646        48,082,345
     Prepaid expenses........................      2,261,338         1,965,379
     Deferred tax assets.....................      1,598,750         1,598,750
                                                ------------      ------------
               Total current assets              156,235,933       164,739,843

Property, plant and equipment, less accumulated
     depreciation of $13,637,007 and $15,350,751
     in 1996 and 1997, respectively.........      53,971,213        59,779,483
                                                ------------      ------------
                                                $210,207,146      $224,519,326
                                                ============       ============

                        LIABILITIES AND STOCKHOLDER'S EQUITY

Current liabilities:
     Accounts payable......................       $9,350,266       $10,909,111
     Accrued salaries......................        2,454,194         1,494,429
     Accrued income taxes..................        1,803,706         5,609,550
     Accrued taxes other than income taxes.          338,997           337,318
     Accrued interest payable..............           59,594            59,594
     Warranty payable......................        1,026,156         1,026,156
     Accrued vacation......................          693,218           859,804
                                                 -----------       -----------
          Total current liabilities               15,726,131        20,295,962
Long term liabilities:
     Long term debt........................       20,000,000        20,000,000
     Deferred income taxes.................        1,602,116         1,602,116
                                                 -----------       -----------
          Total liabilities                       37,328,247        41,898,078
                                                 -----------        ----------
Stockholders' equity:
     Common stock, par value $.01 per share
        60,000,000 shares authorized:
        38,769,514 and 39,202,689 shares
        issued in 1996 and 1997, respectively        387,695           392,027
     Additional paid-in capital............       90,172,863        90,388,612
     Retained earnings.....................       82,318,341        91,840,609
                                                 -----------      ------------

     Total stockholders' equity.............     172,878,899       182,621,248
                                                ------------      ------------
                                                $210,207,146      $224,519,326
                                                ============      ============

</TABLE>
                          See notes to condensed financial statements



<PAGE>
                                                         ADTRAN, INC.
                                                CONDENSED STATEMENTS OF INCOME

                                                          Unaudited

<TABLE>
<CAPTION>
                                                       Three Months Ended
                                                            March 31,
                                                    1996                1997
<S>                                              <C>               <C>
Sales...................................         $54,544,441        61,230,184
Cost of sales...........................          28,809,326        29,438,797
                                                ------------       -----------

          Gross profit..................          25,735,115        31,791,387

Selling, general and administrative
  expenses..............................           7,257,687        10,537,516
Research and development expenses.......           5,501,374         6,995,257
                                                 -----------        ----------

          Income from operations........          12,976,054        14,258,614

Interest expense........................            (280,036)         (242,534)
Other income, net.......................             411,427           862,465
                                                ------------        -----------

Income before income taxes...............         13,107,445        14,878,545
Provision for income taxes...............         (4,484,057)       (5,356,277)
                                                ------------       ------------

          Net income.....................         $8,623,388        $9,522,268
                                                  ==========        ==========

Net income per common and common
          equivalent share...............        $       .22        $      .24
                                                 -----------        ----------

Weighted average common and common
          equivalent shares outstanding..         39,549,106        39,557,130
                                                 ===========       ===========

</TABLE>


                   See notes to condensed financial statements


<PAGE>
                                  ADTRAN, INC.
                       CONDENSED STATEMENTS OF CASH FLOWS
                                    Unaudited
<TABLE>
<CAPTION>
                                                                                       Three Months Ended
                                                                                            March 31,
                                                                                1996                      1997
                                                                                ----                      ----
<S>                                                                          <C>                        <C>
Cash flows from operating activities:
     Net income...............................................               $8,623,388                 $9,522,268
     Adjustments to reconcile net income to net cash
     provided by operating activities:
        Depreciation..........................................                  975,566                  1,716,073
        Provision for losses on accounts receivable...........                   (1,191)                         0
        Provision for losses on inventory.....................                  596,741                    211,975              
        (Gain) loss on sale of property, plant and equipment..                     (329)                    (2,197)
        (Gain) loss on short-term investments.................                  316,165                      5,720
        Change in operating assets:
             Accounts receivable..............................                  118,515                  1,120,839
             Inventory........................................               (6,879,727)                (7,501,674)
             Other receivables................................                  664,771                     66,984
             Prepaid expenses.................................                 (510,232)                   295,959
        Change in operating liabilities:
             Accounts payable.................................               (1,276,277)                 1,558,845
             Accrued salaries.................................                 (482,505)                  (959,765)
             Accrued income taxes.............................                4,039,760                  3,805,845
             Accrued taxes other than income taxes............                    2,197                     (1,679)
             Accrued interest payable.........................                  226,633                          0
             Accrued vacation.................................                  149,702                    166,586
                                                                             ----------                  ---------
       Net cash provided by operating activities...............               6,563,177                 10,005,779
                                                                            -----------                -----------

Cash flows from investing activities:
     Expenditures for property, plant and equipment...........               (5,967,221)                (7,536,817)
     Proceeds from the disposition of property, plant and
        equipment                                                                 4,602                     14,671
     Net (purchase) sale of short-term investments............               (2,513,100)                 2,000,000
                                                                             -----------               -----------
     Net cash provided by (used in) investing activities......              (8,475,720)                 (5,522,146)
                                                                            -----------                -----------
Cash flows from financing activities:
     Proceeds from issuance of common stock...................                  187,316                    220,080
                                                                            -----------                 ----------
     Net cash provided by financing activities................                  187,316                    220,080
                                                                            -----------                 ----------
     Net increase (decrease) in cash and cash equivalents.....               (1,725,227)                 4,703,713

Cash and cash equivalents, beginning of period................               35,027,609                 44,839,131
                                                                            -----------                 ----------
Cash and cash equivalents, end of period......................              $33,302,382                $49,542,844
                                                                            ===========                ===========
Supplemental disclosure of cash flow information:
     Cash paid during the period for interest, net of
       $393,096 and $72,966 of capitalized interest in
       1996 and  1997, respectively........................                 $   111,458                $   242,534
                                                                            ===========                ===========
     Cash paid during the period for taxes....................              $   500,000                $ 1,714,580
                                                                            ===========                ===========
</TABLE>
                               See notes to condensed financial statements
<PAGE>
                                  ADTRAN, INC.
                     NOTES TO CONDENSED FINANCIAL STATEMENTS
                                   (Unaudited)


1. BASIS OF PRESENTATION

     The accompanying  unaudited condensed  financial  statements of ADTRAN,Inc.
(the  "Company")  have been prepared  pursuant to the rules and  regulations for
reporting on Form 10-Q.  Accordingly,  certain information and notes required by
generally accepted accounting  principles for complete financial  statements are
not included herein. In the opinion of management, all adjustments necessary for
a fair presentation of these interim  statements have been included and are of a
normal and recurring nature.  Operating results for the three months ended March
31, 1997 are not necessarily  indicative of the results that may be expected for
the year ending  December  31,  1997.The  interim  statements  should be read in
conjunction  with the financial  statements  and notes  thereto  included in the
Company's latest Annual Report on Form 10-K.

 2. INVENTORY

     At  December  31,  1996 and  March 31,  1997,  inventory  consisted  of the
following:

                                              December 31,           March 31,
                                                 1996                  1997

     Raw materials                          $24,454,251            $26,419,020
     Work in progress                         2 963,220              4,761,198
     Finished goods                          13,375,175             16,902,127
                                            -----------            -----------
                                            $40,792,646            $48,082,345
                                            ===========            ===========


3. THE ALABAMA STATE  INDUSTRIAL  DEVELOPMENT  AUTHORITY

     The Company's  long-term debt outstanding as of March 31, 1997 consisted of
a loan in the amount of  $20,000,000  related to the  expansion of the Company's
facilities in Huntsville, Alabama. The Company is continuing a project to expand
its  facilities in  Huntsville in several  phases over the next three years at a
cost of  approximately  $131,000,000  of which  $41,261,967 had been incurred at
March 31, 1997. The debt  associated  with  $50,000,000 of this project has been
approved for  participation in an incentive program offered by the Alabama State
Industrial  Development  Authority  (the  "Authority").   That  program  enables
participating companies such as the Company to generate Alabama corporate income
tax credits  that can be used to reduce the amount of Alabama  corporate  income
taxes that would  otherwise be payable.  In January 1995,  the Authority  issued
$20,000,000 of its taxable revenue bonds (the "Original Bond"), pursuant to such
program  and  loaned  the  proceeds  from the sale of the  Original  Bond to the
Company. The Original Bond was purchased by AmSouth Bank of Alabama, Birmingham,
Alabama (the "Bank"),  pursuant to a Financing  Agreement  dated January 1, 1995
(the  "Original  Financing  Agreement").  First Union National Bank of Tennessee
(the "Bondholder")  agreed to purchase the Original Bond from the Bank. On April
21, 1997,  the  Authority  adopted a  resolution  authorizing  the  amendment of
documents relating to the $50,000,000 Taxable Revenue Bond, Series 1995 (ADTRAN,
Inc. Project). On April 25, 1997, the Bondholder,  pursuant to the First Amended
and Restated  Financing  Agreement dated April 25, 1997,  purchased the Original
Bond from the  Bank.  The  Authority  issued an  additional  $30,000,000  of its
taxable  revenue  bonds (the  "Amended  and  Restated  Bond"),  pursuant to such
program and loaned the proceeds form the sale of the Amended and Restaed Bond to
the Company,  increasing the Company's long-term debt to $50,000,000 as of April
25, 1997.  The Amended and Restated  Bond was purchased by the  Bondholder.  The
Amended and Restated Bond will bear interest, payable monthly, at the rate of 45
basis  points over the money  market rate of the  Bondholder  and will mature on
January 1, 2020.  The Company has agreed to make  payments to the  Authority  in
amounts  necessary to pay the principal of and interest on the Original Bond and
the Amended and Restated Bond.  Construction  on the project began in March 1995
and certain phases were  completed by March 31, 1997.  There can be no assurance
that the State of  Alabama  will  continue  to make these  corporate  income tax
credit  available in the future,  and the Company  therefore may not realize the
full benefit of these incentives.

4.  RECENT ACCOUNTING DEVELOPMENTS

     In February 1997, the Financial Accounting Standards Board Issued Statement
of Financial Accounting Standards No. 128, "Earnings Per Share" (SFAS 128). SFAS
128 supersedes existing generally accepted accounting principles relative to the
calculation of earnings per share,  is effective for years ending after December
15,  1997 and  requires  restatement  of all  prior  period  earnings  per share
information upon adoption.  Generally,  SFAS 128 requires a calculation of basic
earnings per share,  which takes into  consideration  income (loss) available to
common shareholders and the weighted average of common shares outstanding.  SFAS
128 also requires the calculation of a diluted  earnings per share,  which takes
into  account the impact of all additional common  shares  that would have been
outstanding  if all  dilutive  potential  common  shares  relating  to  options,
warrants, and convertible securities had been issued, as long as their effect is
dilutive, with a related adjustment of income available for common shareholders,
as  appropriate.  SFAS 128  requires  dual  presentation  of basic  and  diluted
earnings  per share on the face of the  statement of  operations  and requires a
reconciliation  of the numerator and denominator of the basic earnings per share
computation.  The Company does not expect the effect of its adoption of SFAS 128
to be material.

  
<PAGE>

Item 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
        RESULTS OF OPERATIONS

Overview

      ADTRAN, Inc. (the "Company") designs, develops, manufactures,  markets and
services a broad range of high speed digital  transmission  products utilized by
telephone  companies  ("Telcos") and corporate  end-users to implement  advanced
digital data services over existing  telephone  networks.  The Company currently
sells its  products to Telcos  (including  all of the  Regional  Bell  Operating
Companies),  Original Equipment  Manufacturers ("OEMs") and, since 1991, private
end-users in the Customer Premises Equipment ("CPE") market.

      The Company's sales have increased each year due primarily to increases in
the number of units sold to both new and existing customers.  These annual sales
increases  reflect the Company's  strategy of increasing  unit volume and market
share through the  introduction  of succeeding  generations  of products  having
lower  selling  prices and  increased  functionality  as  compared  to the prior
generation of a product and to the products of competitors. An important part of
the Company's  strategy is to engineer the reduction of the product cost of each
succeeding product generation and then to lower the product's price based on the
cost savings  achieved.  As a part of this  strategy,  the Company seeks in most
instances to be a low cost,  high  quality  provider of products in its markets.
The Company's success to date is attributable in large measure to its ability to
initially  design  its  products  with a view  to  their  subsequent  re-design,
allowing  efficient  enhancements  of the  product  in each  succeeding  product
generation. This strategy has enabled the Company to sell succeeding generations
of products to existing  customers  as well as to increase  its market  share by
selling these enhanced products to new customers.

      The Company  intends to retain all earnings for use in the  development of
its  business  and  does  not  anticipate  paying  any  cash  dividends  in  the
foreseeable future.

     When used in this Form 10-Q, the words  "believe,"  "anticipate,"  "think,"
"intend," "will be," and similar expression identify forward looking statements.
Such statements are subject to certain risks and uncertainties which could cause
actual results to differ materially from those projected.  Readers are cautioned
not to place undue reliance on these forward looking statements which speak only
as of the date hereof.  Readers are also urged to carefully  review and consider
the various  disclosures made by the Company which attempt to advise  interested
parties of the  factors  which  affect the  Company's  business,  including  the
disclosures  made in other  periodic  reports on Forms 10-K,  10-Q and 8-K filed
with the Securities and Exchange Commission.

<PAGE>
Results of Operations - Three Months Ended March 31, 1996 Compared to Three
                        Months Ended March 31, 1997

     Sales

     The Company's sales  increased  12.3% from  $54,544,441 in the three months
ended March 31, 1996 to  $61,230,184  in the three  months ended March 31, 1997.
The  increased  sales resulted  from an  increase  in sales  volume to  existing
customers and from increased market penetration. Sales to Telcos increased 14.9%
from  $32,385,385 in the three months ended March 31, 1996 to $37,208,097 in the
three  months  ended  March 31,  1997.  The  increase in Telco sales in the 1997
period resulted  primarily from increased sales of Integrated  Services  Digital
Network  ("ISDN")   products  and  increased  sales  of  High  bit-rate  Digital
Subscriber  Line ("HDSL")  products.  Telco sales as a percentage of total sales
increased  from 59.4% in the three  months  ended March 31, 1996 to 60.8% in the
three months ended March 31, 1997.  Sales of CPE products  increased  16.0% from
$15,143,210 in the three months ended March 31, 1996 to $17,568,943 in the three
months ended March 31, 1997, as a result of increased CPE sales of ISDN products
and T1 Service Unit ("TSU")  products.  OEM sales decreased 8.0% from $7,015,846
in the three months ended March 31, 1996 to $6,453,144 in the three months ended
March 31, 1997.  This  decrease  was  attributable  primarily to reduced  demand
related to mature programs combined with the low volume normally  encountered on
new  programs.   Additionally,  the  Company  has  converted  numerous  products
originally  developed  under OEM  contract  status to  ADTRAN  standard  product
status.  This conversion was accomplished  with permission from the OEM contract
holders and was done to allow the Company to pursue markets directly that will 
no longer support a two tier  distribution  structure.  The financial effect of 
the increase in overall unit volume was offset somewhat by lower unit selling 
prices for many of the Company's products.

     Cost of Sales

     Cost of sales  increased  2.2% from  $28,809,326  in the three months ended
March  31,  1996 to  $29,438,797  in the three  months  ended  March  31,  1997,
primarily as a result of the increase in sales.  As a percentage of sales,  cost
of sales  decreased from 52.8% in the three months ended March 31, 1996 to 48.1%
in the three  months ended March 31, 1997.  An important  part of the  Company's
strategy is to reduce the product cost of each succeeding product generation and
then to lower the  product's  price  based on the cost  savings  achieved.  This
strategy  sometimes  results in variations in the Company's  gross profit margin
due to  timing  differences  between  recognition  of  cost  reductions  and the
lowering  of product  selling  prices.  In view of the rapid pace of new product
introductions  by the Company,  this  strategy may result in variations in gross
profit margins  that,for any particular  financial  period,  can be difficult to
predict.

     Selling, General and Administrative Expenses

     Selling,   general  and   administrative   expenses  increased  45.2%  from
$7,257,687 in the three months ended March 31, 1996 to  $10,537,516 in the three
months ended March 31, 1997.  The  increase  was due to  additional  sales and
support expenditures necessary as a result of the Company's expanded sales base.
Selling,  general and administrative expenses as a percentage of sales increased
from 13.3% in the three months ended March 31, 1996 to 17.2% in the three months
ended March 31, 1997.

     Research and Development Expenses

     Research and  development  expenses  increased 27.2% from $5,501,374 in the
three months ended March 31, 1996 to  $6,995,257 in the three months ended March
31, 1997. The increase was due to increased  engineering  costs  associated with
new product  introductions and product cost and feature enhancement  activities.
As a percentage of sales, research and development expenses increased from 10.1%
in the three  months  ended  March 31, 1996 to 11.4% in the three  months  ended
March 31, 1997.
<PAGE>
     Interest Expense

     Interest  expense  decreased  13.4% from $280,036 in the three months ended
March 31, 1996 to  $242,534  in the three  months  ended  March 31,  1997.  This
decrease was due to  capitalization  of the interest  cost incurred as a part of
the cost of acquiring  certain assets.  The Company paid interest on $20,000,000
of revenue bond proceeds  loaned to the Company in January 1995,  which proceeds
are being used to expand the Company's  facilities in Huntsville,  Alabama.  See
"Liquidity and Capital Resources" below.

     Net Income

     As a  result  of  the  above  factors,  net  income  increased  10.4%  from
$8,623,388  in the three months ended March 31, 1996 to  $9,522,268 in the three
months ended March 31,  1997.  As a percentage  of sales,  net income  decreased
slightly  from 15.8% in the three  months  ended  March 31, 1996 to 15.6% in the
three months ended March 31, 1997.


Liquidity and Capital Resources

     The Company is continuing a project to expand its  facilities in Huntsville
in  several  phases  over  the  next  three  years  at a cost  of  approximately
$131,000,000 of which  $41,261,967 had been incurred at March 31, 1997. The debt
associated with $50,000,000 of this project has been approved for  participation
in an incentive  program  offered by the Alabama  State  Industrial  Development
Authority (the "Authority").  The Authority issued an additional  $30,000,000 of
its taxable  revenue bonds (the "Amended and Restated  Bond"),  pursuant to such
program  and  loaned  the  proceeds  from the sale of the Amended and Restated
Bond to the  Company, increasing the Company's long-term debt to $50,000,000 as
of April 25, 1997. The Company will make payments to the  Authority in amounts  
necessary to pay the principal of and interest on the Amended and Restated Bond,
which  matures on January 1, 2020.

     The Company's  working capital  position  improved from  $140,509,802 as of
December 31, 1996 to $144,443,881 as of March 31, 1997. This  improvement in the
Company's working capital position was due primarily to increased earnings.  The
Company has used,  and expects to continue  to use,  the  remaining  proceeds of
prior public offerings for working capital and other general corporate purposes,
including (i) product  development  activities to enhance its existing  products
and develop new products and (ii)  expansion of sales and marketing  activities.
Inventory  increased  17.9%  from  December  31,  1996 to March 31,  1997.  This
increase  was  attributable  to the  Company's  desire to ship larger  orders to
customers from available stock.

     Capital expenditures totaling $29,661,438 in 1996 and $7,536,817 in the
first three months of 1997 were used to expand the Company's headquarters and to
purchase equipment.

     At March 31, 1997,  the Company's  cash on hand of  $49,542,844  short-term
investments of $30,550,210  and $10,000,000  available under a $10,000,000  bank
line of credit placed the Company's  potential cash availability at $90,093,054,
of which a portion is being used to expand the  Company's  facilities  under the
incentive program described above. The Company's $10,000,000 bank line of credit
bears  interest  at the  rate  of  87.5  basis  points  over  the 30 day  London
inter-bank  offered rate and expires in May 1997.  The Company  intends to renew
its $10,000,000 bank line of credit upon expiration.

     The Company  intends to finance its operations in the future with cash flow
from  operations,  the remaining net proceeds of the public  offerings,  amounts
available under the bank line of credit, borrowed taxable revenue bond proceeds,
and possible additional public financings.  These available sources of funds are
expected to be adequate to meet the  Company's  operating  and capital needs for
the foreseeable future.

<PAGE>

PART II.  OTHER INFORMATION

Item 6.   Exhibits and Reports on Form 8-K

           (a)   The following exhibits are being filed with this report.

                 Exhibit No.      Description

                      10.1         Documents relating to the $50,000,000 Taxable
                                   Revenue Bond, Series 1995 (ADTRAN, Inc. 
                                   Project) issued by the State Industrial
                                   Development Authority.

                                   (a)  First Amended and Restated Financing  
                                        Agreement dated April 25, 1997
                                        among the State Industrial Development
                                        Authority,a public corporation organized
                                        under the laws of the State of Alabama
                                        (the "Authority"), the Company and First
                                        Union National Bank of Tennessee, a
                                        national banking corporation (the
                                        Bondholder);

                                   (b)  First Amended and Restated Loan 
                                        Agreement dated April 25, 1997
                                        between the Authority and the Company;
                                      
                                   (c)  First Amended and Restated Specimen
                                        Taxable Revenue Bond, Series 1995
                                        (ADTRAN, Inc. Project);
                                  
                                   (d)  First Amended and Restated Specimen Note
                                        from the Company the the Bondholder,
                                        dated April 25, 1997; 
                                     
                                   (e)  Investment Agreement dated April 25, 
                                        1997 among the Company, the Bondholder
                                        and AmSouth Bank  of Alabama, an
                                        Alabama banking corporation;
 
                                   (f)  Resolution of the Authority authorizing 
                                        the amendment of certain documents dated
                                        April 25, 1997 relating to the 
                                        $50,000,000 Taxable Revenue Bond, Series
                                        1995 (ADTRAN, Inc. Project); 
                                                                 
                                   (g)  Resolution of the Company authorizing
                                        the First Amended and Restated Financing
                                        Agreement, the First Amended and
                                        Restated Loan  Agreement, the First 
                                        Amended and Restated Note and the
                                        Investment Agreement.
                                  
                      11           Weighted Average Common and Common Equivalent
                                   Shares Outstanding

                      27           Financial Data Schedule

           (b)   Reports on Form 8-K. None
                 

<PAGE>
                                     SIGNATURE

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
 the  Registrant  has duly  caused this report to be signed on its behalf by the
 undersigned, thereunto duly authorized.


                                            ADTRAN, INC.
                                           (Registrant)


Date:  May 9, 1997                         /s/John R. Cooper
                                           -----------------
                                              John R. Cooper
                                              Vice President - Finance and
                                              Chief Financial Officer
<PAGE>

                                 INDEX OF EXHIBITS


Exhibit No.     Description                                    Page Number

     10.1      Documents relating to the $50,000,000 Taxable
               Revenue Bond, Series 1995 (ADTRAN, Inc.Project
               issued by the State Industrial Development 
               Authority.

              (a)  First Amended and Restated Financing Agreement dated 
                   April 25, 1997, among the State Industrial Development
                   Authority, a public corporation organized under
                   the laws of the State of Alabama (the "Authority")
                   the Company and First Union National Bank of
                   Tennessee, a national banking corporation (the Bondholder)
                                       
              (b)  First Amended and Restated Loan Agreement dated
                   April 25, 1997 between the Authority and the Company;
                                      
              (c)  First Amended and Restated Specimen Taxable Revenue
                   Bond, Series 1995 (ADTRAN, Inc. Project);
                                  
              (d)  First Amended and Restated Specimen Note from the
                   Company the the Bondholder, dated April 25, 1997; 
                                     
              (e)  Investment Agreement dated April 25, 1997 among the
                   Company, the Bondholder and AmSouth Bank of Alabama, 
                   an  Alabama banking corporation;
 
              (f)  Resolution of the Authority authorizing the amendment
                   of certain documents dated April 25, 1997 relating to
                   the $50,000,000 Taxable Revenue Bond, Series 1995
                   (ADTRAN, Inc. Project); 
                                                                 
              (g)  Resolution of the Company authorizing the First Amended
                   and Restated Financing Agreement, the First Amended and
                   Restated Loan  Agreement, the First Amended and Restated
                   Note and the Investment Agreement.
                                  
     
     11       Weighted Average Common and Common Equivalent 
              Share Outstanding                                            15

     27       Financial Data Schedule                                      16



THIS FIRST AMENDED AND RESTATED  FINANCING  AGREEMENT dated as of April 25,
1997 is entered into by the STATE  INDUSTRIAL  DEVELOPMENT  AUTHORITY,  a public
corporation  organized  under the laws of the State of Alabama  (the  "Issuer"),
ADTRAN,  INC., a corporation  organized  under the laws of the State of Delaware
(the "Company"),  and FIRST UNION NATIONAL BANK OF TENNESSEE, a national banking
association, with its principal office in the City of Nashville,  Tennessee (the
"Bondholder").

                              Recitals

      The Issuer has  heretofore  issued its Taxable  Revenue Bond,  Series 1995
(ADTRAN,  Inc.  Project) in an authorized  principal  amount of $50,000,000 (the
"Original  Bond")  pursuant  to that  certain  Financing  Agreement  dated as of
January  1, 1995 among the  issuer,  the  Company  and  AmSouth  Bank of Alabama
("AmSouth") (the "Original Financing Agreement").

     Pursuant to the Original Financing Agreement, AmSouth agreed to make a loan
or loans  ("Advances") to the Issuer in an amount not to exceed  $50,000,000 for
the purpose of financing the acquisition,  construction and equipping of certain
office,   manufacturing,   design,  engineering,   assembling  and  distribution
facilities  referred to as the  "Project".  An Advance of  $20,000,000  was made
pursuant to the Original Financing Agreement.

      The  Bondholder has now agreed to purchase the Original Bond from AmSouth,
and to make a further Advance to the Issuer in an aggregate amount not to exceed
$50,000,000  total authorized  amount  (including the advance under the Original
Financing  Agreement)  in order to complete the  financing  of the  Project.  In
connection with the execution and deliver of this Amended and Restated Financing
Agreement,  the Issuer will issue its Amended and Restated Taxable Revenue Bond,
Series  1995  (ADTRAN,  INC.  Project)  in an  authorized  principal  amount  of
$50,000,000  (the  "Amended  and  Restated  Bond")  pursuant to this Amended and
Restated Financing  Agreement.  The Original Bond as amended and restated by the
Amended and  Restated  Bond is herein  referred to as the "Bond".  The  Original
Financing  Agreement  as amended  and  restated  by this  Amended  and  Restated
Financing Agreement is herein referred to as the "Financing Agreement". The Bond
will continue to evidence the limited obligation of Issuer to repay Advances.

     The Issuer and the Company have  heretofore  entered into that certain Loan
Agreement  dated as of  January  1, 1995 (the  "Original  Loan  Agreement").  In
connection  with  the  execution  and  delivery  of this  Amended  and  Restated
Financing Agreement, the Issuer and the Company shall enter into a First Amended
And  Restated  Loan  Agreement  dated as of April  25,  1997 (the  "Amended  and
Restated Loan Agreement"; the Original Loan Agreement as amended and restated by
the Amended  and  Restated  Loan  Agreement  is herein  referred to as the "Loan
Agreement"),  whereby the Issuer will agree to loan the  proceeds of the Bond to
the Company,  and the Company will agree to make loan  repayments  sufficient to
pay the principal of, premium (if any) and interest on the Bond ("Debt Service")
when due. As evidence of its obligation to make loan  repayments with respect to
Debt  Service  on the  Original  Bond,  the  Company  has  issued  its note (the
"Original  Note") and, in  connection  with the  execution  and  delivery of the
Amended and Restated  Financing  Agreement,  will issue its amended and restated
note (the  "Amended and Restated  Note") as provided in the Amended and Restated
Loan  Agreement.  The  Original  Note as amended and restated by the Amended and
Restated Note is herein referred to as the "Note".

      The Bond is a limited  obligation of the Issuer  payable solely out of the
payments  by the  Company  pursuant  to the Loan  Agreement  and the  Note  (the
"Pledged Revenues").

     As security for the payment of Debt  Service on the bond,  the Issuer shall
assign and pledge to the Bondholder all right,  title and interest of the Issuer
in and to the Pledged  Revenues,  the Loan  Agreement  and the Note  (except for
certain rights personal to the Issuer).

      It is  contemplated  by the parties that in connection  with the execution
and delivery of the Amended and Restated Financing  Agreement (i) the Bondholder
shall  purchase the  Original  Bond from AmSouth as provided in this Amended and
Restated financing  Agreement,  (ii) the Issuer shall transfer the Original Bond
to the Bondholder pursuant to the requirements of this Agreement, by issuing the
amended and Restated Bond provided for under this Amended and Restated financing
Agreement,  (iii) an Advance will be made  pursuant to this Amended and Restated
Financing  Agreement in the principal  amount of  $30,000,000,  (iv) the Company
shall issue the Amended and Restated Note to the  Bondholder  under the terms of
the Amended and  Restated  Loan  Agreement  and (v) the  Bondholder  will sell a
participation  interest  in the Bond  evidencing  the  outstanding  Advances  to
AmSouth pursuant to a Participation  Agreement dated April 25, 1997, between the
Bondholder and AmSouth.  Upon completion of the  transaction  described in these
recitals,  Advances  in the  total  authorized  amount  of  $50,000,000  will be
outstanding under this Financing Agreement.

     NOW,  THEREFORE,  for and in  consideration  of the premises and the mutual
covenants  hereinafter  contained,  the parties hereto covenant,  agree and bind
themselves as follows:

GRANTING CLAUSES

      The  Issuer,  in  consideration  of the  premises  and  the  purchase  and
acceptance of the Bond by the Bondholder,  and of the sum of one dollar,  lawful
money of the United States of America,  to it duly paid by the  Bondholder at or
before the  execution  and  delivery of these  presents,  and for other good and
valuable consideration, the receipt of which is hereby acknowledged, in order to
secure the  Indebtedness  and to secure the  performance  and  observance by the
issuer of all the covenants expressed herein and in the Bond, does hereby assign
and grant a  security  interest  in the  following  to the  Bondholder,  and its
successors  and assigns  forever,  for the  securing of the  performance  of the
obligations of the Issuer hereinafter set forth:

GRANTING CLAUSE FIRST

      All right,  title and interest of the Issuer in and to the Loan Agreement,
the Note,  the  Investment  Agreement and the Pledged  Revenues,  and the Issuer
further  hereby  expressly  assigns and grants to the  Bondholder the exclusive,
present  and  continuing  right to make claim  for,  collect,  receive  and give
receipt for any of the amounts  payable or receivable  under the Loan  Agreement
and the Note  (except  for  amounts  payable  to the Issuer as  Additional  Loan
Payments), to bring actions and proceedings under and otherwise enforce the Loan
Agreement,  the Note and the Investment  Agreement,  and to generally do any and
all things which the Issuer would or would become  entitled to do under the Loan
Agreement,  the Note and the Investment Agreement in the absence of the grant to
the bondholder provided herein,  whether or not an Event of Default exists under
the Loan Agreement, the Note or the Investment Agreement or be regarded, and may
act with respect to the Note, Loan Agreement and Investment Agreement, as though
the  Bondholder  were the holder and  absolute  owner  thereof free of any other
claim  whatsoever,  except only for the rights expressly  reserved by the Issuer
herein as to  Additional  Loan  Payments and the Issuer's  right of notice under
Section 10.2 hereof.

GRANTING CLAUSE SECOND

      All  right,  title and  interest  of the  Issuer in and to all  moneys and
securities (if any) from time to time held by the Bondholder  under the terms of
this financing Agreement.

GRANTING CLAUSE THIRD

      Any and all other  property  rights and interests of every kind and nature
from time to time  hereafter  by  delivery  or by writing  of any kind  granted,
bargained, sold, alienated, demised, released, conveyed, assigned,  transferred,
mortgaged,  pledged,  hypothecated  or otherwise  subjected  hereto,  as and for
additional  security herewith,  by the Company or any other person on its behalf
or with its written  consent or by the Issuer or any other  person on its behalf
or with its written consent,  and the Bondholder is hereby authorized to receive
any and all such  property  at any and all  times and to hold and apply the same
subject to the terms hereof.

      TO HAVE AND TO HOLD all and singular the interests and property covered by
the foregoing, upon the terms herein set forth;

      PROVIDED, HOWEVER, that if the issuer, its successors or assign shall well
and  truly  pay,  or cause to be paid,  the Debt  Service  on the Bond due or to
become  due  thereon,  at the  times  and in the  manner  set  forth in the bond
according to the true intent and meaning thereof, and shall well and truly cause
to be kept,  performed and observed all of its covenants and conditions pursuant
to the terms of this financing  Agreement,  then upon the final payment  thereof
this Financing  Agreement and the rights hereby  granted shall cease,  determine
and be void;  otherwise this financing  Agreement shall remain in full force and
effect.

ARTICLE 1

Definitions and Other Provisions
of General Application

      Section  1.01.   Definitions.  For  all  purposes  of  this
Agreement,  except as otherwise expressly provided or unless  the
context otherwise requires:

          (1) The terms defined in this Article shall have the meanings assigned
            to them in this Article.  Singular terms shall include the plural as
            well as the singular, and vice versa.

          (2) All  references  in  this  instrument  to  designated  "Articles",
            "Sections" and other  subdivisions  are to the designated  Articles,
            Sections and subdivisions of the instrument as originally executed.

          (3) All  accounting  terms  not  otherwise  defined  herein  have  the
            meanings assigned to them, and all computations  herein provided for
            shall be made,  in accordance  with  generally  accepted  accounting
            principles.  All references herein to "generally accepted accounting
            principles"  refer to such  principles  as they exist at the date of
            application thereof.

          (4) The terms "herein",  "hereof",  and "hereunder" and other words of
            similar  import  refer to this  Agreement  as a whole and not to any
            particular Article, Section or other subdivision.

          (5) The term  "person"  shall  include  and  individual,  corporation,
            partnership,  joint  venture,  association,   trust,  unincorporated
            organization  and any government or agency or political  subdivision
            thereof.

      Acquisition Costs shall have the meaning assigned to that term in the Loan
Agreement.

      Additional  Loan  Payments  shall mean the amounts  payable by the Company
pursuant to Section 4.2(b), Section 7.2 and Section 8.4 of the Loan Agreement.

      Advances  shall  mean  the  loans  provided  for in  Section  3.01 of this
Financing Agreement.

      Aggregate  Advances shall mean the total principal  amount of the Advances
made under the Financing Agreement.

      Amended  and  Restated  Bond  shall mean the  amended  and  restated  bond
delivered pursuant to this Amended and Restated Financing Agreement.

      Amended  and  Restated  Financing  Documents  shall mean the  Amended  and
Restated  Financing  Agreement,  the Amended and Restated Loan Agreement and the
Amended and Restated Note.

      Amended  and  Restated  Loan  Agreement  shall mean the First  Amended and
Restated  Loan  Agreement  dated as of April 25, 1997 between the Issuer and the
Company.

      Amended and Restated Note shall mean the promissory  note in the principal
amount of  $50,000,000  delivered  to the  Company  pursuant  to the Amended and
Restated Loan Agreement.

      AmSouth shall mean AmSouth Bank of Alabama,  a state  banking  corporation
under the laws of the State of Alabama,  with its principal place of business in
Birmingham, Alabama.

      Authorized  Company  Representative  shall  mean the  President,  the Vice
President or the Secretary of the Issuer.

      Authorized  Issuer  Representative  shall  mean  the  President,  the Vice
President or the Secretary of the Issuer.

      Basic Loan Payments shall mean the amounts payable by the Company pursuant
to Section 4.2(a) of the Loan Agreement.

      Bond shall mean the Original  Bond, as amended and restated by the Amended
and Restated  Bond  delivered  pursuant to this  Amended and Restated  Financing
Agreement.

     Bond  Payment Date shall mean each date on which Debt Service is payable on
the Bond.

       Bondholder shall mean First Union National Bank of Tennessee, an national
banking  association  with  its  principal  office  in the  City  of  Nashville,
Tennessee, and its successors and assigns.

      Business  Day shall mean any day other than a Saturday,  a Sunday or a day
in which banking institutions are required or authorized to remain closed in the
city where the bondholder maintains its place of business for performance of its
obligations under this Agreement.

      Change of Control means the  occurrence,  after the date of this Financing
Agreement,  of (i) any Person or two or more Persons acting in concert acquiring
beneficial  ownership  (within the meaning of Rule 13d-3 of the  Securities  and
Exchange  Commission  under the Securities  Exchange Act of 1934, as amended) or
control,  directly  or  indirectly,  of  securities  of the  Company  (or  other
securities  convertible  into such  securities)  representing 51% or more of the
combined  voting power of all securities of the Company  entitled to vote in the
election of directors; or (ii) during any period of up to 12 consecutive months,
commencing  before of after the date of this  Agreement,  individuals who at the
beginning of such 12-month  period were directors of the Company ceasing for any
reason to constitute a majority of the Board of Directors of the Company  unless
the Persons  replacing such individuals were nominated by the Board of Directors
of the Company.

      Commitment  shall mean  $50,000,000  (subject to reductions as provided in
Section 3.01(e) hereof).

      Company shall mean ADTRAN, Inc., a corporation organized under the laws of
the State of  Delaware,  until a  successor  corporation  shall have become such
pursuant to the applicable provisions of the Financing Documents, and thereafter
"the Company" shall mean such successor corporation.

      Costs of Issuance  shall mean the  expenses  incurred by the Issuer or the
Company in connection with the issuance of the Bond, including legal, consulting
and accounting fees and expenses.

      Debt  Service  shall mean the  principal,  premium  (if any) and  interest
payable on the Bond.

     Enabling Law shall mean Articles 2 and 2A, Chapter 10, Title 41 of the Code
of Alabama 1975, as amended.

      Environmental  Laws means the  Environmental  Protection Act, the Resource
Conservation and Recovery Act of 1976, the Comprehensive Environmental Response,
Compensation and Liability Act of 1980, the Hazardous  Materials  Transportation
Act and any other federal,  state or municipal law, rule or regulation  relating
to air  emissions,  water  discharge,  noise  emissions,  solid or liquid waster
disposal,  hazardous or toxic waster or  materials,  or other  environmental  or
health matters.

      Event of Default  shall  have the  meaning  state in article 5 hereof.  An
Event of Default shall "exist" if an event of default shall have occurred and be
continuing.

      Financing  Agreement  shall  mean the  Original  Financing  Agreement,  as
amended and restated by this First Amended and Restated Financing Agreement.

     Financing Documents shall mean this Financing Agreement, the Loan Agreement
and the Note.

      Indebtedness shall mean all indebtedness of the Issuer at the time secured
by the Pledged Revenues,  including  without  limitation (i) all Debt Service on
the Bond and (ii) all  reasonable and proper  charges and  disbursements  by the
Bondholder made under the Financing Agreement.

      Interest  Payment  Date  shall mean the first  Business  Day of each month
beginning May 1, 1997.

      Interest  Period  shall mean the 30-day  period  beginning on one Interest
Payment Date and ending on the next Interest Payment Date.

      Investment  Agreement  shall  mean  the  agreement  described  in  Section
3.04(b)(3) hereof.

       Issuer shall mean the State industrial  Development  authority,  a public
corporation organized under the laws of the State of Alabama.

      Loan  Agreement  shall mean the  Original  Loan  Agreement  as amended and
restated by the Amended and Restated Loan Agreement.

     Loan Default  shall mean a "Default"  within the meaning state in Article 8
of the Loan Agreement. A Loan Default shall "exist" if such a Default shall have
occurred and be continuing.

      Material Adverse Effect means any event or condition  which,  singly or in
the aggregate  with other events or conditions,  material and adversely  affects
the business, properties, or operations of the Company.

      Money  Market  Account-Based  Rate  shall  mean a rate 45 basis  points in
excess of the Money Market  Account  Rate,  as determined on the date of initial
issuance  of the  Amended  and  Restate  Bond and  each  Interest  Payment  Date
thereafter.  The Money Market  Account-Based  Rate  determined  on each Interest
Payment Date shall remain in effect until the following Interest Payment Date.

      Money Market  Account  Rate shall mean,  with respect to any time at which
the Money Market  Account-Based  Rate is to be determined,  the rate of interest
announced by the Bondholder as its interest rate applicable to Commercial  Money
Market  Investment  Accounts or, if such  accounts are no longer  offered by the
Bondholder,  the rate applicable to the interest-bearing  demand deposit account
type used by  commercial  customers of the  Bondholder  which,  in  Bondholder's
judgment,  most nearly  approximates  the product known as of the date hereof as
the Commercial Money Market Investment Account.

     Note shall mean the  Original  Note as amended and  restated by the Amended
and Restated Note.

      Opinion of Counsel  shall mean a written  opinion of counsel  who shall be
acceptable to the Bondholder.

      Original  Bond  shall mean the bond  delivered  pursuant  to the  Original
Financing Agreement.

       Original Financing  Agreement shall mean that certain Financing Agreement
dated as of January 1, 1995 among the Issuer, the Company and AmSouth.

       Original  Financing  Documents  shall  mean  the  Original
Financing Agreement, the Original Loan Agreement and the Original
Note.

      Original Loan Agreement shall mean that certain Loan Agreement dated as of
January 1, 1995 between the Issuer and the Company.

      Original Note shall mean the  promissory  note in the principal  amount of
$50,000,000 delivered by the Company pursuant to the Original Loan Agreement.

       Person shall  include any  individual,  corporation,  partnership,  joint
venture,  association,  trust, unincorporated organization and any government or
any agency or political subdivision thereof.

      Pledged  Revenues shall mean all amounts  payable by the Company under the
Loan Agreement, except for Additional Loan Payments.

      Post-Default  Rate shall  mean (i) in  respect of any Debt  Service on the
Bond  which is not paid when due and,  (ii)  with  respect  to any other  amount
payable under the Financing  Documents  which is not paid when due, a rate equal
to the then effective interest rate on the Bond, plus 200 basis points.

      Preliminary  Agreement shall mean that certain Preliminary Agreement dated
as of November  16,  1994,  between  the Issuer and the Company  relating to the
financing of the Project.

      Principal  Office of the  Bondholder  shall  mean the  principal  place of
business  of the  Bondholder,  presently  located  at 150 Fourth  Avenue  North,
Nashville, Tennessee 37219.

      Project  shall mean (I) the Project  Site,  (ii) the Project  Building and
(iii) the Project Equipment, as such terms are defined in the Loan Agreement.

     Section  1.02.  Effect of Headings and Table of  Contents.  The Article and
Section  headings herein and in the Table of Contents are for  convenience  only
and shall not affect the construction hereof.

     Section 1.03.  Date of Agreement.  The date of this Financing  Agreement is
intended as and for a date for the convenient  identification  of this Financing
Agreement  and is not intended to indicate  that this  Financing  Agreement  was
executed and delivered on said date.

      Section 1.04.  Severability  Clause.  If any  provision in this  Financing
Agreement shall be invalid, illegal or unenforceable,  the validity, legality or
enforceability  of the remaining  provisions shall not in any way be affected or
impaired thereby.

      Section  1.05.   Governing Law.  This  Financing  Agreement
shall be construed in accordance with and governed by the laws of
the State of Alabama.

     Section 1.06. Counterparts.  This instrument may be executed
in any number of counterparts, each of which so executed shall be
deemed  an  original,  but all such counterparts  shall  together
constitute but one and the same instrument.

                              ARTICLE 2

                 Representations, Warranties and Covenants

      Section 2.01.  Representation  and  Warranties  of the Issuer.  The Issuer
makes  the  following  representations  and  warranties  as the  basis  for  the
undertakings on its part herein contained:

          (1) It is duly organized as a public  corporation  under the provision
     of the  Enabling  Law and is not in  default  under  any of the  provisions
     contained in its certificate of  incorporation  or in the laws of the State
     of Alabama.

           (2) Under the  provisions of the Enabling Law and its  certificate of
     incorporation, it has the power to consummate the transactions contemplated
     by the Financing Documents to which it is a party.

           (3) By proper  corporate  action it has duly authorized the execution
     and  delivery  of the  Financing  Documents  to which it is a party and the
     consummation of the transactions contemplated therein.

            (4) It has  obtained all  consents,  approvals,  authorizations  and
     order of governmental authorities that are required to be obtained by it as
     a condition  to the  delivery of the  Financing  Documents to which it is a
     party.

          (5) The  execution  and delivery by it of the  Financing  Documents to
     which  it is a  party  and  the  consummation  by it  of  the  transactions
     contemplated  therein  will not  conflict  which,  be in  violation  of, or
     constitute  (upon  notice or lapse of time,  or both) a  default  under its
     certificate  of  incorporation,   and  to  its  knowledge,  any  indenture,
     mortgage, deed of trust or other contract, agreement or instrument to which
     it is a part or is subject,  or any resolution,  order,  rule,  regulation,
     writ, injunction, decree or judgment of any governmental authority or court
     having jurisdiction over it.

           (6) The Financing  Documents to which it is a party constitute legal,
     valid and binding  obligations and are enforceable against it in accordance
     with the terms of such  instruments,  except as enforcement  thereof may be
     limited by (I) bankruptcy,  insolvency, or other similar laws affecting the
     enforcement  of  creditors'  rights and (ii) general  principles of equity,
     including the exercise of judicial discretion in appropriate cases.

      Section 2.20  Representations  and Warranties of the Company.  The Company
makes  the  following  representations  and  warranties  as the  basis  for  the
undertakings on its part herein contained:

           (1) It is duly organized as a corporation under the laws of the state
     of its  incorporation  and is not in  default  under any of the  provisions
     contained in its certificate of  incorporation  or bylaws or in the laws of
     the state of its incorporation.

           (2) It has the corporate  power and  authority to own its  properties
     and assets and to carry on its business as now being  conducted and is duly
     qualified to do business in every  jurisdiction  where the character of its
     properties  or  the  nature  of its  activities  makes  such  qualification
     necessary.

           (3)  Its  financial  statements  that  have  been  furnished  to  the
     Bondholder  are  complete  and  correct and fairly  present  its  financial
     condition as of the date or dates indicated and for the periods involved in
     accordance  with  generally  accepted  accounting  principles  applied on a
     consistent  basis.  There  has been no  materially  adverse  change  in its
     financial  condition  or  operations  since  the  date of its  most  recent
     financial statements furnished to the Bondholder.

           (4) It has good and marketable title to all its properties and assets
     reflected on its most recent  balance  sheet  furnished to the  Bondholder,
     except for such  properties  and  assets as have been  dispose of since the
     date of such  balance  sheet as no longer  used or useful in the conduct of
     its  business  or as have been  disposed of in the  ordinary  course of its
     business. All such properties and assets are free and clear of liens of any
     nature, except as disclosed in such financial statements.

           (5) It has filed or caused to be filed all  federal,  state and local
     tax returns which are required to be filed by it, and has paid or caused to
     be paid all taxes as shown on such returns or on any  assessments  received
     by it to the extent that such taxes have become due and payable.

          (6) It does not  intend to use any part of the  proceeds  of the Bond,
     and has not incurred any  indebtedness to be reduced,  retired or purchased
     by it out of such  proceeds,  for the purpose of purchasing or carrying any
     margin stock  within the meaning of  Regulation U of the Board of Governors
     of the Federal Reserve System,  and it does not own and has no intention of
     acquiring any such margin stock.

           (7) The execution and delivery of the Financing Documents to which it
     is a party will not involve any prohibited  transaction  within the meaning
     of the Employee Retirement Income Security Act of 1974, as amended (ERISA),
     or the Internal  Revenue  Code.  It has  fulfilled  its  obligations  under
     minimum  funding  standards of ERISA and is in  compliance  in all material
     respects with the applicable provisions of ERISA.

           (8) It has the power to consummate the  transactions  contemplated by
     the Financing Documents to which it is a party.

           (9) By proper  corporate  action it has duly authorized the execution
     and  delivery  of the  Financing  Documents  to which it is a party and the
     consummation of the transactions contemplated therein.

            (10) It has obtained all  consents,  approvals,  authorizations  and
     orders of governmental  authorities  that are required to be obtained by it
     as a condition to the execution and delivery of the Financing  Documents to
     which it is a party.

           (11) The execution  and delivery by it of the Financing  Documents to
     which  it is a  party  and  the  consummation  by it  of  the  transactions
     contemplated  therein will not (I) conflict  with,  be in violation  of, or
     constitute  (upon  notice  or lapse of time or both) a  default  under  its
     certificate of incorporation or bylaws,  any indenture,  mortgage,  deed of
     trust or other contract,  agreement or instrument to which it is a party or
     is subject, or any resolution,  order, rule, regulation,  writ, injunction,
     decree  or  judgment  of  any   governmental   authority  or  court  having
     jurisdiction  over  it  or  (ii)  result  in or  require  the  creation  or
     imposition  of any lien of nay  nature  upon or with  respect to any of its
     properties no owned or hereafter  acquired,  except as  contemplated by the
     Financing Documents.

           (12) The Financing Documents to which it is a party constitute legal,
     valid and binding  obligations and are enforceable against it in accordance
     with the terms of such  instruments,  except as enforcement  thereof may be
     limited by (I) bankruptcy,  insolvency, or other similar laws affecting the
     enforcement  of  creditors'  rights and (ii) general  principles of equity,
     including the exercise of judicial discretion in appropriate cases.

           (13) There is not action, suit, proceeding,  inquiry or investigation
     pending before any court or governmental  authority,  or threatened against
     it or affecting it or its properties, that (I) involves the consummation of
     the transactions contemplated by, or the validity or enforceability of, any
     of the Financing  Documents or (ii) could have a materially  adverse impact
     upon its financial condition or operations.

           (14) The Project  constitutes a "project" of the type  authorized and
     permitted by the Enabling Law.

           (15)  The  Company  is duly  qualified  and  authorized  to  transact
     business in the State of Alabama.

            (16) No investment bankers or underwriters are providing services of
     any nature in  connection  with the  issuance  and sale of the Bond and the
     various transactions associated therewith.

     Section   2.03.  Representations  and  Warranties   of   the
     Bondholder.

     (a) Enforcement of this Agreement.  The Bondholder  represents and warrants
that this Financing Agreement  constitutes a legal, valid and binding obligation
of the Bondholder and is enforceable  against the Bondholder in accordance  with
the terms of this instrument, except as enforcement hereof may be limited by (I)
bankruptcy,  insolvency,  or other  similar laws  affecting the  enforcement  of
creditors' rights and (ii) general principles of equity,  including the exercise
of judicial discretion in appropriate cases.

     (b) Company's  Credit.  The Bondholder  represents and warrants that it has
made its own  investigation  of the  Company's  credit and the  adequacy  of the
Pledged  Revenues to pay Debt  Service and the  Bondholder  does not rely on any
representation  of  the  Issuer  with  respect  to the  creditworthiness  of the
Company,  the amount or  adequacy  of the  Pledged  Revenues  or the  investment
quality of the Bond.

     Section 2.04  Reporting Requirements of Company.

     (a) Quarterly Financial Reports. As soon as available,  and in any event by
the 45h. day of each fiscal  quarter end other than the fiscal  quarter ending a
fiscal year, the Company shall deliver to the Bondholder a balance sheet, income
statement  and  statement  of cash flows of the Company for and as of the end of
the preceding fiscal quarter,  all prepared by the Company on a consistent basis
and  certified  by the  Company's  president  or chief  financial  officer to be
complete and correct and to present  fairly,  in accordance with GAAP (excluding
year-end adjustments and required footnote disclosures), the financial condition
of the Company and its consolidated  affiliates,  if any, as of the date of such
statements  and the results of its  operations  for such period.  The  quarterly
financial  information  shall include a compliance  certificate  executed by the
President or Chief Financial Officer of the Company.

     (b) Annual Financial Reports. As soon as available, and in any event within
90 days after the end of each  fiscal  year,  the Company  shall  deliver to the
Bondholder  the audited  balance sheet of the Company as of the end of such year
and the related statements of income,  retained earnings and cash flows for such
year,  together  with  supporting  schedules and  management  letters or similar
communications from the accountants,  all such statements prepared in accordance
with GAAP on a consolidated and consolidating basis by an independent  certified
public accountant  acceptable to the Bondholder showing the financial  condition
of the Company and its consolidated affiliates at the close of such year and the
results of its  operations  during such year. The annual  financial  information
shall  include a  compliance  certificate  executed  by the  President  or Chief
Financial Officer of the Company.

     (c) Other  Information.  The Company shall provide the Bondholder with such
additional information regarding the financial condition, properties, operations
and prospects of the Company and its consolidated entities as the Bondholder may
reasonably require.

     The Company further covenants with the Bondholder as follows:

     (1)  Compliance  with Laws.  The Company is not in  violation of any law or
regulation  to which the  Company,  its  business or any of its  properties  are
subject, the violation of which would likely have a Material Adverse Effect, and
there are no outstanding citations, notices or orders of noncompliance issued to
the  Company  under any such law or  regulation,  the  violation  of which would
likely have a Material  Adverse  Effect.  The Company has obtained all licenses,
permits,  franchises,  or other  governmental  authorizations  necessary  to the
ownership of its properties or to the conduct of its business.

     (2) Full  Disclosure of Material  Facts.  The Company has fully advised the
Bondholder of all matters involving the Company's financial condition, business,
operations,  properties or industry that would be reasonably  expected to have a
Material Adverse Effect. No information,  exhibit,  or report furnished or to be
furnished by the Company to the  Bondholder  in  connection  with the  Agreement
contains,  as of the date thereof,  any  misrepresentation  of fact or failed or
will fail to state any  material  fact,  the  omission of which would render the
statements therein materially false or misleading.

     (3) Environmental  Compliance.  The Company has duly complied with, and its
properties are owned and operated in compliance  with, all  Environmental  Laws,
the  violation  of which would have  Material  Adverse  Effect.  The Company has
obtained all required federal, state and local licenses, certificates or permits
relating to it and its properties that are required by applicable  Environmental
Laws.

     (4)  Maintenance of Existence and Business.  The Company shall maintain its
corporate existence,  name, rights, and franchises and shall continue to operate
primarily in the same type of business as it engages in as of the date hereof.

     (5) Notice of  Litigation.  The Company  shall give the  Bondholder  prompt
written  notice  of  any  litigation,  arbitration,  tax  audit,  administrative
proceeding  or  investigation  that may hereafter be instituted or threatened in
writing in which the Company would be a party or which  otherwise any affect the
Company or any of its  business,  operations or  properties,  except for actions
which, if adversely determined, would not have a Material Adverse Effect.

     (6) Other  Notices.  The Company shall  promptly  notify the  Bondholder in
writing  if  the  Company  learns  of  the  occurrence  of (I)  any  event  that
constitutes  and Event of Default,  together  with a detailed  statement  of the
steps being taken as a result thereof, or (ii) any other event or condition that
has a Material Adverse Effect.

     (7) Taxes.  The Company shall make due and timely payment or deposit of all
federal,  state and local taxes,  assessments or contributions required of it by
law,  and  execute  and  deliver  to  the  Bondholder,  on  demand,  appropriate
certificates  attesting to the payment or deposit  thereof;  provided,  however,
that the  Company  shall  not be  required  to pay or  discharge  any such  tax,
assessment,  charge or claim for as long as it is being diligently  contested in
good faith by proper  proceedings and for which  appropriate  reserves are being
maintained.

     (8)  Compliance  with Laws.  The Company  shall observe and comply with all
laws and regulations, and shall maintain all certificates,  franchises, permits,
licenses,  and  authorizations  necessary  to the conduct of its business or the
operation of its properties.

     (9) Accounts and  Records.  The Company  shall  maintain  current  books of
record and account,  in which,  full,  true, and correct entries will be made of
all transactions.

     (10) Environmental Matters

           (a) COMPLIANCE WITH  ENVIRONMENTAL  LAWS. The Company will (i) employ
     in connection  with its operations,  appropriate  technology and compliance
     procedures to maintain  compliance with any applicable  Environmental Laws,
     (ii) obtain and maintain  any and all  materials  permits or other  permits
     required by applicable Environmental Laws in connection with its operations
     and (iii)  dispose of any and all  Hazardous  Substances  (as so treated in
     Environmental  Laws)  only  at  facilities  and  with  carriers  reasonably
     believed to possess  valid permits under  Environmental  Laws.  The Company
     shall use its best efforts to obtain all certificates required by law to be
     obtained by the  Company  from all  contractors  employed by the Company in
     connection with the transport or disposal of any Hazardous Substances.

            (b)  REMEDIAL   WORK.  If  any   investigation,   site   monitoring,
     containment,  clean-up, removal,  restoration or other remedial work of any
     kind or nature with respect to the  Company's  properties is required to be
     performed by the Company under any applicable  local,  state or federal law
     or   regulation,   any  judicial   order,   or  by  any   governmental   or
     non-governmental  entity or Person  because of, or in connection  with, the
     current  or future  presence,  suspected  presence,  release  or  suspected
     release of a Hazardous  Substance  in or into the air,  soil,  groundwater,
     surface  water or soil  vapor at,  on,  about,  under or within  any of the
     Company's  property (or any portion  thereof),the  Company  shall within 30
     days after written demand for  performance  thereof (or such shorter period
     of time as may be  required  under  applicable  law,  regulation,  order or
     agreement) commence and thereafter diligently prosecute to completion,  all
     such remedial work.

           (c)  INDEMNIFICATION  OF  THE  BONDHOLDER.   The  Company  agrees  to
     indemnify,  defend (with counsel  satisfactory  to the Bondholder) and hold
     harmless  Bondholder  against  any  loss,  liability,   claim  or  expense,
     including  attorney's  fees,  that  Bondholder may incur as a result of the
     violation or alleged  violation of any  Environmental Law by the Company or
     with respect to any other violation of  Environmental  Laws with respect to
     the Company's properties.  This covenant shall survive the repayment of the
     Bond.

      (11)  Change of Control.  The Company shall not  suffer  or
permit the occurrence of a Change of Control.

                              ARTICLE 3

               Agreement to Make Advance and Purchase Bond

      Section 3.01. Advance. The Bondholder agrees, on the terms of this Amended
and Restated Financing  Agreement,  to make a loan (the "Advance") to the Issuer
in an aggregate  amount at any one time  outstanding up to but not exceeding the
amount of the  Commitment  then in effect.  The  Advance  made  pursuant  to the
Original  Financing  Agreement  in the amount of  $20,000,000  was loaned to the
Company  contemporaneously  with the  execution  and  delivery  of the  Original
Financing  Agreement.  In  connection  with the  execution  and delivery of this
Amended and Restated  Financing  Agreement,  the  Bondholder  will  purchase the
Original Bond from AmSouth and the Issuer will transfer the Original Bond to the
Bondholder  pursuant to the terms  hereof by issuing  the  Amended and  Restated
Bond.  In  addition,  an  Advance  under this  Amended  and  Restated  Financing
Agreement  shall be made in the amount of $30,000,000 and shall be loaned to the
Company  contemporaneously  with the execution  and delivery of this  Agreement,
raising the Aggregate  Advances as of the date of execution and delivery  hereof
to the Commitment amount of $50,000,000.

      Section 3.02. Purchase of Bond.  Contemporaneously  with the execution and
delivery of this Amended and Restated  Financing  Agreement the Bondholder shall
purchase  the Original  Bond From AmSouth at a purchase  price equal to Advances
under the Original  Financing  Agreement  plus accrued  interest (if any) on the
Original  Bond.  The  Aggregate  Advances  shall be evidenced by the Amended and
Restated  Bond in  substantially  the form  contained  in Article 4 hereof.  The
obligation of the Bondholder to make the Advances shall  constitute the purchase
price of the Bond.

      Section 3.03. Use of Proceeds of Advances.  The Advance hereunder shall be
used to fund an identical and contemporaneous  loan by the Issuer to the Company
under the Loan Agreement.  Accordingly,  not later than 12:00 noon  (Birmingham,
Alabama  time) on the date  specified  for the Advance,  the  Bondholder  shall,
subject to the terms and conditions of this Financing Agreement,  make available
the amount of the  Advance to be made on such date by  delivering  the same,  in
immediately  available funds, to the Company. The Company shall use the proceeds
of the Advance and the corresponding loan solely to pay or reimburse Acquisition
Costs or Costs of Issuance.

     Section 3.04  Conditions Precedent to the Advance.

      (a) The Advance.  The  obligation  of the  Bondholder  to make the Advance
hereunder  in the  amount  of  $30,000,000  is  subject  to the  receipt  by the
Bondholder of the following  documents,  each of which shall be  satisfactory to
the Bondholder in form and substance:

      (1)    Original Financing Documents and Original  Bond.   A
specimen copy
of  the duly executed Original Bond and a counterpart of each  of
the
Original Financing Documents, duly executed.

     (2)   Amended and Restated Bond.  The Amended and Restated
Bond, duly
executed.

     (3)   Amended and Restated Financing Documents.  A
counterpart of each
of the Amended and Restated Financing Documents, duly executed.

      (4)    Opinion of Bond Counsel.  An opinion of bond counsel
(Maynard,
Cooper & Gale, P.C., Birmingham, Alabama)  in form and substance
satisfactory to the Bondholder.

     (5)   Opinion of Company Counsel.  An opinion of counsel for
Company  (James L. North, Esq., Birmingham, Alabama) in form  and
substance satisfactory to the Bondholder.

     (6) Organization of Issuer and Approvals.  Certificates with respect to the
certificate of incorporation of the Issuer and all corporate action taken by the
Issuer   approving  the  Financing   Documents  and  the   consummation  of  the
transactions contemplated thereby (including,  without limitation, a certificate
setting forth the  resolutions  of the board of directors of the Issuer for such
purpose).

     (7)  Organization  of the Company and  Approvals.  Certified  copies of the
charter and bylaws of the Company and all corporate  action taken by the Company
approving  the  Financing  Documents and the  consummation  of the  transactions
contemplated thereby (including, without limitation,  acertificate setting forth
the  resolutions of the board of directors of the Company for such purpose and a
certificate  of incumbency  identifying  all officers of the Company who execute
any of the  Financing  Documents or any other  document  executed in  connection
therewith).

     (8) No Litigation Certificates.  Execution and delivery of a certificate by
the Issuer and the Company stating that there is no litigation presently pending
or to their  knowledge  threatened  against the Issuer or the Company (or if so,
describing  the same) which,  in the opinion of the  Bondholder  or its counsel,
might adversely affect the Bond or the Bondholder's security.

     (9)  Certificate of the Issuer.  Execution and delivery of a certificate of
the Issuer  certifying  that as of the date of the  Advance:  the Issuer has not
made any assignment for the benefit of creditors, nor has a receiver, liquidator
or trustee of the Issuer or any of the Issuer's  property been appointed nor has
any petition for bankruptcy  reorganization  or other  arrangement of the Issuer
pursuant to the Federal  Bankruptcy  Code,  been filed,  nor has the Issuer been
adjudicated  a  bankrupt  or  insolvent,  nor is any  voluntary  or  involuntary
petition by or against the Issuer as debor seeking an order for relief  pursuant
to the United States Bankruptcy Code, or any similar statute,  pending, nor been
filed nor has a state  court  entered an order for relief for the Issuer nor has
the Issuer been  liquidated  or dissolved or its  articles of  incorporation  or
charter expires or been revoked.

     (10) Certificate of the Company. Execution and delivery of a certificate of
the Company  certifying that as of the date of the Advance:  the Company has not
made any assignment for the benefit of creditors, not has a receiver, liquidator
or trustee of the Company or any of the Company's  property  been  appointed nor
has any petition  for  bankruptcy  reorganization  or other  arrangement  of the
Company pursuant to the Federal Bankruptcy Code, been filed, nor has the Company
been  adjudicated a bankrupt or insolvent,  nor is any voluntary or  involuntary
petition  by or  against  the  Company  as debtor  seeking  an order for  relief
pursuant to the United States Bankruptcy Code, or any similar statute,  pending,
nor been filed nor has a state court entered an order for relief for the Company
nor  has  the  Company  been   liquidated   or  dissolved  or  its  articles  of
incorporation or charter expired or been revoked.

      (11)  Schedule of Expenses.  A schedule (in summary  form) of all expenses
incurred in connection with the Original Financing  Agreement to date,  together
with  certification by an officer of the Company that all such expenditures have
been  made  in  accordance  with  the  requirements  of the  Original  Financing
Documents and applicable law.

      (b)  Other Conditions.  The obligation of the Bondholder to
make  the  Advance  under  this Amended  and  Restated  Financing
Agreement is subject to the further conditions precedent that:

          (1) No Default and Accuracy of Representations.  As of the date of the
Advance and after  giving  effect  thereto:  (I) no Event of Default  shall have
occurred  and to be  continuing;  (ii)  no  event  shall  have  occurred  and be
continuing  which,  with notice or lapse of time or both,  would  constitute  an
Event of Default under this Financing  Agreement,  and (iii) the representations
and  warranties  made by the Company in Section 2.02 hereof shall be true on and
as of the date of the making of such  Advance  with the same force and effect as
if made on and as of such date.

           (2)  Security.  On the date of the  Advance  under this  Amended  and
Restated  Financing  Agreement the Company shall  establish money market deposit
accounts with the Bondholder and any Participant in the Bond (collectively,  the
"Money Market Account") and shall enter into an Investment Agreement dated April
25,  1997,  with  the  Bondholder  and any  such  Participant.  Pursuant  to the
Investment Agreement, the Company shall grant as security for the payment of the
Note a first priority right of setoff against and first priority  perfected lien
security  interest in the Money Market  Account.  The pledge of the Money Market
Account shall be pursuant to documentation  satisfactory to the Bondholder.  The
Company may not use the  proceeds of any Advance  pursuant to this  Agreement to
make such deposit or to otherwise effect the pledge required by this Agreement.

Additional Evidence.  The Bondholder may require the delivery of such additional
legal opinions,  certificates,  proceedings,  instruments and other documents as
the Bondholder or its counsel may reasonably  request to evidence (I) compliance
by the Issuer and the Company with laws and legal  requirements,  (ii) the truth
and accuracy,  as of the date of the Advance, of the respective  representations
of the  Issuer and the  Company  contained  in the  Financing  Documents  or the
documentation  required  by this  Section,  and  (iii)  the due  performance  or
satisfaction  by the  Issuer  and the  Company  at or  prior to the date of such
Advance, of all agreements then required to be performed and all conditions then
required to be satisfied by the Issuer and the Company pursuant to the Financing
Documents.


                              ARTICLE 4

                              The Bond

     Section 4.01.  General Terms of the Bond.

      (a) The Bond shall be issued to evidence the  obligation  of the Issuer to
repay the Aggregate Advances made under the Financing Agreement.  The Bond shall
be entitled "Taxable Revenue Bond, Series 1995 (ADTRAN, Inc. Project)" and shall
be dated January 13, 1995.

      (b) The  principal  amount of the Bond  shall  mature  and be  payable  on
January 1, 2020.

      (c) Except as otherwise  provided below,  the outstanding  unpaid Advances
and the Bond shall bear interest during each Interest Period as the Money Market
Account-Based Rate for such Interest Period. The Money Market Account-Based Rate
applicable to the outstanding  unpaid  Advances for the initial  Interest Period
shall be  determined  as the  date of  delivery  of this  Amended  and  Restated
Financing  Agreement and thereafter shall be determined on the first day of each
succeeding Interest Period.

      Interest accrued on the outstanding  unpaid Advances and on the Bond shall
be computed on the basis of an assumed year of 360 days for the actual number of
days  elapsed,  payable on each  Interest  Payment  Date. At least ten (10) days
prior to each Interest  Payment Date, the Bondholder shall provide the Company a
written  statement  calculating  the amount due as  interest on the Bond on such
Interest  Payment Date based upon the  interest  rate option in effect since the
prior Interest Payment Date.

      (d) Interest on overdue principal and premium,  if any, and (to the extent
legally enforceable) on any overdue installment of interest on the Bond shall be
payable at the Post-Default Rate.

      (e) Debt  Service on the Bond  payable on any Bond  Payment  Date shall be
paid to the person in whose  name the Bond is  registered  on such Bond  Payment
Date (or,  if such Debt  Service  is not paid on the due date,  to the person in
whose name the Bond is  registered  on the date that the Issuer makes payment of
such Debt Service).

     (f) Debt  Service  on the  Bond  shall  be paid by wire  transfer  or other
same-day  funds to the account  designated  by the  Bondholder  by notice to the
Issuer and to the Company,  except for Debt Service  payable on the Bond Payment
Date on which the  outstanding  principal  balance  of the Bond is to be paid in
full,  which shall be paid only upon  surrender  of the Bond to the Issuer.  All
such  payments  shall be made in such coin or currency  of the United  States of
America as of the time of payment is legal  tender for the payment of public and
private debts.

     Section 4.02.  Redemption

      (a) The issuer shall have the right  (exercised  upon the direction of the
Company  if no Loan  Default  exists)  to redeem,  without  penalty,  all or any
portion of the unpaid  principal  amount of the Bond (in  integral  multiples of
$5,000) at any time at a redemption price equal to 100 % of the principal amount
to be redeemed plus accrued interest thereon to the redemption date.

      (b) Notice of redemption  having been given as provided in this  Financing
Agreement,  the principal of the Bond to be redeemed  shall,  on the  redemption
date, become due and payable at the redemption price specified in subsection (a)
of this  Section,  and from and after such date (unless the Issuer shall default
in the  payment of the  redemption  price)  such  principal  shall cease to bear
interest.

     Section 4.03.  Optional Tender

     (a) The Bondholder shall have the option to tender the Bond for purchase in
whole on April 25, 1999. If not exercised,  the  Bondholder's  right of optional
tender shall be extended as follows.  Unless the Bondholder  notifies the Issuer
and the Company to the contrary in writing prior to February 1 of any year,  the
optional  tender date shall be  automatically  extended for an additional  year,
with no further action  required of the  Bondholder,  the Issuer or the Company.
The optional tender date may not be extended in this automatic manner beyond the
date 5 years  from the date of the  Advance  under  this  Amended  and  Restated
Financing  Agreement unless the Bondholder,  at its sole option,  reinstates the
automatic  renewal  provision for an additional 5 years by giving written notice
to that effect. The automatic optional tender extension  provision may similarly
operate into the future, with the Bondholder's affirmative written reinstatement
being necessary to continue the automatic  renewal feature for successive 5 year
periods.

     (b) The  election  of the  Bondholder  to  exercise  any right of  optional
redemption  shall be evidenced  by written  notice to the Company and the Issuer
dated at least 30 days prior to the optional tender date.

       Section  4.04.  Form of Bond.  The Bond  shall  be  substantially  in the
following form, with such appropriate insertions,  omissions,  substitutions and
other variations as are required or permitted by this Financing Agreement:

               [Form of Amended and Restated Bond]

        State Industrial Development Authority (Alabama)
                Taxable Revenue Bond, Series 1995
                     (ADTRAN, Inc. Project)

     The STATE INDUSTRIAL  DEVELOPMENT AUTHORITY, a public corporation organized
under the laws of the  State of  Alabama  (the  "Issuer"),  for value  received,
hereby  promises  to  pay to  the  registered  owner  identified  below,  or its
registered assigns, the principal sum of FIFTY MILLION DOLLARS ($50,000,000), or
such lesser amount as shall equal the aggregate  unpaid  principal amount of the
Advances  made by the  Bondholder  to the Issuer under the  Financing  Agreement
referred  to below,  on  January  1,  2020,  and to pay  interest  on the unpaid
principal  amount of each such Advance from the date of such Advance  until such
Advance is paid in full, at the rate per annum and on the dates  provided in the
Financing  Agreement.  All payments of principal and interest on this bond shall
be made in lawful  money of the United  States of America  by wire  transfer  or
other same-day funds to the account designated by the Bondholder, except for the
final payment of principal and interest  which shall be made only upon surrender
of this bond to the Issuer.

     This bond is issued under and pursuant to that certain Financing  Agreement
dated as of January 1, 1995,  as amended and restated by an Amended and Restated
Financing  Agreement  dated as of April 25,  1997 (the  "Financing  Agreement"),
among the Issuer,  First Union  National Bank of Tennessee,  a national  banking
association,  with  its  principal  office  in the  City of  Nashville,  TN (the
"Bondholder"),  and ADTRAN, Inc., a corporation  organized under the laws of the
State of Delaware  (the  "Company").  Capitalized  terms not other wise  defined
herein shall have the meanings assigned in the Financing Agreement.

Pursuant to the Financing Agreement, the Bondholder has agreed to make a loan or
loans  (the  "Advances")  to the  Issuer in an  aggregate  amount not to exceed,
$50,000,000  for the purpose of financing the costs of  acquiring,  constructing
and equipping of certain office, manufacturing,  design, engineering, assembling
and  distribution  facilities  refereed  to in the  Financing  Agreement  as the
"Project".  As  evidence  of its  repayment  obligation  with  respect  to  such
Advances, the Issuer has issued this bond.

     Pursuant to a Loan  Agreement  dated as of January 1, 1995,  as amended and
restated as of April 25, 1997 (the "loan Agreement"), between the Issuer and the
Company,  the amounts  received as Advances by the Issuer and the  Company,  the
amounts received as Advances by the Issuer have and will be loaned by the Issuer
to the  Company  and the Company has agreed to repay such loan or loans at times
and in amounts  which will be  sufficient  to pay Debt Service on this bond when
due. The Company's repayment  obligations under the Loan Agreement are evidenced
by the Note.

      Debt services on this bond is payable solely out of the amounts payable by
the Company pursuant to the Loan Agreement.  As security for the payment of Debt
Service on this bond,  the Issuer has assigned and pledged to the Bondholder all
right,  title and  interest of the Issuer in and to the Loan  Agreement  and the
Note (except for certain rights personal to the Issuer).

      THIS  BOND IS A LIMITED  OBLIGATION  OF THE  ISSUER  PAYABLE  SOLELY  FROM
AMOUNTS PAYABLE BY THE COMPANY UNDER THE LOAN AGREEMENT AND THE NOTE AND SECURED
SOLELY BY THE PLEDGED REVENUES. THIS BOND WILL NOT CONSTITUTE AN INDEBTEDNESS OR
OTHER LIABILITY OF THE STATE OF ALABAMA OR OF ANY POLITICAL SUBDIVISION THEREOF.
NEITHER  THE  FAITH  OR  CREDIT  OF THE  STATE  OF  ALABAMA  NOR  ANY  POLITICAL
SUBDIVISION THEREOF SHALL BE PLEDGED TO THE PAYMENT OF THIS BOND OR THE INTEREST
THEREON  AND THE  ISSUANCE  OF THIS  BOND  SHALL  NOT  DIRECTLY,  INDIRECTLY  OR
CONTINGENTLY  OBLIGATE THE STATE OF ALABAMA OR ANY POLITICAL SUBDIVISION THEREOF
TO APPLY  MONEY FOR,  OR LEVY OR PLEDGE  ANY FORM OF  TAXATION  WHATEVER  TO THE
PAYMENT OF, THE PRINCIPAL OF, PREMIUM, IF ANY, OR THE INTEREST OF THIS BOND, THE
ISSUER HAS NO TAXING POWER.

      The  Issuer  may  at  is  option   (exercised  at  the  direction  of  the
Company)redeem  all or any portion of the  principal  of this bond (in  integral
multiples of $5,000) at any time prior to maturity,  upon the terms  provided in
the financing Agreement.

     The  Bondholder  shall have the option to tender this Bond for  purchase in
whole on April 25, 1999 (or such later date as  provided  under the terms of the
Financing  Agreement).  If not  exercised,  the  Bondholder's  right of optional
tender shall be extended upon there terms provided in the Financing Agreement.

     If an "Event of  "Default"  as defined  in the  Financing  Agreement  shall
occur,  the  principal of this bond may become or de declared due and payable in
the manner and with the effect provided in the Financing Agreement.

     This bond is  transferable  on the Bond Register  maintained by the Issuer,
upon  surrender  of this bond for  transfer  at the office of the  Issuer,  duly
endorsed  by,  or  accompanied  by a  written  instrument  of  transfer  in form
satisfactory to the Issuer duly executed by, the registered holder hereof or his
attorney  duly  authorized in writing,  and thereupon  evidence of such transfer
shall be  endorsed by the Issuer on the  certificate  of  registration  attached
hereto.

     No service charge shall be made for any transfer  hereinbefore referred to,
but the Issuer may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection therewith.

     The  Issuer,  the  Company  and any agent of the Issuer or the  Company may
treat the person in whose name this bond is registered as the owner of this bond
for the purpose of  receiving  payment of Debt  Service on this bond and for all
other purposes  whatsoever,  whether or not any payment on this bond is overdue,
and, to the extent  permitted  by law,  neither the Issuer,  the Company nor nay
such agent shall be affected by notice to the contrary.

     No covenant or agreement  contained in this bond or the Financing Agreement
shall be deemed to be a covenant or agreement of any officer,  agent or employee
of the Issuer,  and neither any member of the board of  directors  of the Issuer
nor any officer  executing this bond shall be liable  personally on this bond or
be subject to any personal liability or accountability by reason of the issuance
of this bond.

     It is hereby certified,  recited and declared that all acts, conditions and
things required to be performed by the Issuer  precedent to and in the execution
and delivery of the Financing Agreement and issuance of this bond do exist, have
happened  and have been  performed  in due time,  form and manner as required by
law.

     IN WITNESS  WHEREOF,  the Issuer has caused  this bond to be duly  executed
under its corporate seal.

Dated:  January 13, 1995.

                                 STATE   INDUSTRIAL   DEVELOPMENT
AUTHORITY



     By:_______________________________________
                                                    Its President

(S E A L)

Attest________________________
                 Secretary


                   Certificate of Registration

   This             bond is  registered  on the Bond Register in the name of the
                    person listed below:

        Date of             Name of             Signature of
      Registration     Registered Holder         Authorized
                                              Officer of Issuer

   January 13, 1995     AmSouth Bank of
                            Alabama
                      First Union National
                       Bank of Tennessee


     Section 4.05. Registration and Transfer.

     (a) The Bondholder, as designee of the Issuer shall cause to be kept at its
principal  place of  business a register  (herein  sometimes  referred to as the
"Bond  Register") in which,  subject to such  reasonable  regulations  as it may
prescribe,  the Issuer shall  provide for the  registration  of the Bond and the
registration of transfers of the Bond as herein provided.

     (b)  Upon  surrender  for  transfer  of  the  Bond  at  the  office  of the
Bondholder,  as designee of the Issuer shall cause to be noted such  transfer in
the  Bond  Register  and  shall  record  such  transfer  in the  certificate  of
registration attached to the Bond.

      c Upon  presentation  or  surrender  for  transfer,  the Bond shall (if so
required  by the  Issuer)  be duly  endorsed,  or be  accompanied  by a  written
instrument of transfer in form  satisfactory  to the Issuer duly  executed,  the
registered holder thereof or his history attorney duly authorized in writing.

     (d) No service  charge  shall be made for any  transfer  or exchange of the
Bond, but the Issuer may require payment of a sum sufficient to cover any tax or
other governmental charge that may be imposed in connection with any transfer or
exchange of the Bond.

       (e) The  Issuer,  the  Company and any agent of the Issuer or the Company
     may treat the person in whose name the Bond is  registered  as the owner of
     the purpose of  receiving  payment of Debt  Service on the Bond and for all
     other purposes whatsoever whether or not any payment on the Bond is overdue
     and, to the extent  permitted by law,  neither the Issuer,  the Company nor
     any such agent shall affected by notice to the contrary.

    Section  4.06.   Execution.  The Bond shall  be  executed  on
behalf of the Issuer by it President or Vice President under  its
corporate seal and attested by its Secretary.


                            ARTICLE 5

                      Defaults and Remedies


      Section 5.01.  Events of Default.  Any one or more of the following  shall
constitute  an Event of Default  under this  Financing  Agreement  (whatever the
reason for such event and whether it shall be  voluntary  or  involuntary  or be
effected by operation of law or pursuant to any judgment, decree or order of any
court to any order,  rule or  regulation  of any  administrative  or  government
body):

     (1)  default in the payment of interest upon the Bond when such
interest becomes due and payable; or

     (2) default in the payment of the principal of (or premium, if any, on) the
Bond when such principal ( or premium, if any) becomes due and payable,  whether
at its stated maturity, by declaration or acceleration or call for redemption or
otherwise; or

     (3)  default in the purchase of the Bonds as required pursuant to
Section 4.03: or

     (4) default in the performance,  or breach,  of any covenant or warranty of
the Issuer or the Company in this Financing  Agreement (other than a covenant or
warranty,  a default in the  performance or breach of which is elsewhere in this
Section  specifically  dealt with),  and  continuance  of such default or breach
period of 30 days after there has been given,  registered or certified  mail, to
the Issuer and the Company by the  Bondholder a written notice  specifying  such
default or breach and  requiring  it to be remedied and stating that such notice
is a "notice of default: hereunder; or

     (5) any representation or warranty made by the Issuer or the Company herein
or in any document,  instrument or  certificate  furnished to the  Bondholder in
connection with the transactions  contemplated by this Financing Agreement shall
at any time prove to have been false or incorrect in any material  respect as of
the time made; or

     (6) the  occurrence of any event  default,  as therein  defined,  under any
other Financing Document,  and the expiration of the applicable grace period, if
any, specified therein;

      (7) the  occurrence  of an event of  default  under  any  other  agreement
evidencing or securing the Company's  obligation for repayment of money borrowed
from the  Bondholder  or AmSouth,  and the  expiration of the  applicable  grace
period, if any, specified therein; or

      (8) the occurrence of an event of default under the  Investment  Agreement
described in Section 3.04(b)(3) of this Agreement.

      Section 5.02.  Acceleration  of Maturity.  If an event of Default  exists,
then and in every such case the Bondholder may declare the principal of the Bond
and the interest accrued thereon to be due and payable immediately,  by a notice
in  writing to the Issuer and the  Company  and upon any such  declaration  such
principle  and the interest  accrued  thereon shall become  immediately  due and
payable.

      Section 5.03.  Rights and Remedies  Cumulative.  No right or remedy herein
conferred  upon  reserved to the  Bondholder  is intended to be exclusive of any
other right or remedy and every right and remedy shall, to the extent  permitted
by law, be cumulative and in addition to every other right and remedy given here
under  or now or  hereafter  existing  at law or in  equity  or  otherwise.  The
assertion or employment of any right or remedy  hereunder,  or otherwise,  shall
not prevent the  concurrent  assertion or  employment  of any other  appropriate
right or remedy.

      Section  5.04.  Delay or Omission Not Waiver.  No delay or omission of the
Bondholder  to exercise  any right or remedy  accruing  upon an Event of Default
shall  impair any such right or remedy or  constitute a waiver of any such Event
of Default or an  acquiescence  therein.  Every  right and remedy  given by this
Article or by law to the Bondholder may be exercised from time to time, as often
as may demand expedient, by the Bondholder.

     Section 5.05. Waiver of Appraisement and other Laws.

     (a) To the full extent that they may lawfully so agree,  the Issuer and the
Company  will not at any time insist upon,  plead,  claim or take the benefit or
advantage of, any appeasement,  valuation, stay, extension or redemption law now
or  hereafter  in force in order to prevent or hinder  the  enforcement  of this
Financing Agreement;  and the Issuer and the Company, for themselves and all who
may claim under them, so far as they now or hereafter may lawfully do so, hereby
waive the benefit of all such laws.

     (b) If any law in this Section  referred to and now in force,  of which the
Issuer or the  Company  or their  respective  successors  might  take  advantage
despite this Section,  shall hereafter be repealed or cease to be in force, such
law shall not thereafter be deemed to constitute any part of the contract herein
contained or to preclude of this Section.
     Section 6.01.  Payments.

     (a) Except to the extent otherwise provided herein, all payments under this
Financing  Agreement  (including  Debt  Service  on the  Bond)  shall be made in
immediately  available  funds to the  Bondholder at the Principal  Office if the
Bondholder,  not later than 1:00 P.M. (Birmingham,  Alabama time) on the date on
which such  payment  shall become due (each such payment made after such time on
such due date to be deemed to have  been  made on the next  succeeding  Business
Day).

     (b) If any payment under this Financing  Agreement is due on a day which is
not a Business Day, such payment may be made on the first  succeeding  day which
is a Business  Day with the same  effect as if made on the day such  payment was
due.

     Section 6.02.  Company  Appointed as Agent.  The Issuer hereby appoints the
Company  as its agent  for the  purpose  of  giving  the  required  notices  for
redemption's under this Financing Agreement; provided, however, that the Company
shall have no authority it obligate the Issuer for payment from any source other
than the Pledged Revenues, it being understood that the Issuer's liability under
this Financing Agreement is limited as provided in Section 6.03.

     Section 6.03.  Limitation of Liability of Issuer.

     (a) The liability of the Issuer for the payment of any money due under this
Financing  Agreement  and the  Bond  shall  be  limited  solely  to the  Pledged
Revenues.

      (b) The Bond shall not be a general  obligation of the Issuer but shall be
a limited and special  obligation  payable solely out so payments by the Company
pursuant to the Loan  Agreement  and the Note.  THE BOND WILL NOT  CONSTITUTE AN
INDEBTEDNESS  OR OTHER  LIABILITY  OF THE STATE OF ALABAMA  OR OF ANY  POLITICAL
SUBDIVISION THEREOF. NEITHER THE FAITH OR CREDIT OF THE STATE OF ALABAMA NOR ANY
POLITICAL SUBDIVISION THEREOF SHALL BE PLEDGED TO THE PAYMENT OF DEBT SERVICE ON
THE BOND AND THE  ISSUANCE  OF THE BOND  SHALL NOT BE  DIRECTLY,  INDIRECTLY  OR
CONTINGENTLY  OBLIGATE THE STATE OF ALABAMA OR ANY POLITICAL SUBDIVISION THEREOF
TO APPLY  MONEY FOR,  OR LEVY OR PLEDGE  ANY FORM OF  TAXATION  WHATEVER  TO THE
PAYMENT OF, DEBT SERVICE ON THE BOND. THE ISSUER HAS NO TAXING POWER.

     (c) No recourse  under or upon any covenant or agreement of this  Financing
Agreement shall be had against any past, present or future incorporator,  agent,
officer or member of the Board of Directors of the Issuer,  or of any  successor
corporation,  either  directly or through  the Issuer,  whether by virtue of any
constitution,  statue or rule of law, or by the enforcement of any assessment or
penalty  or  otherwise;  it  being  expressly  understood  that  this  Financing
Agreement  is solely a  corporate  obligation,  and that no  personal  liability
whatever  shall  attach to, or is or shall be  incurred  by,  any  incorporator,
agent,  officer  or  member  of the  Board of  Directors  of the  Issuer  or any
successor  corporation,  or any of them,  under or by reason of the covenants or
agreements contained in this Agreement.


     Section 6.04. Purchase for Investment

     (a)  Except as  described  in  subsection  (b)  below,  the  Bondholder  is
purchasing the Bond solely for its own account and for the purpose of investment
and not for resale,  and the Bondholder has no present intention of distributing
or reselling the Bond, but subject, nevertheless, to the disposition of the Bond
being at all times within the Bondholder's control.

     (b) When the  Advance is made under this  Amended  and  Restated  Financing
Agreement,  the  Bondholder  will sell a  participation  interest in the Bond to
AmSouth. AmSouth shall execute and deliver to the Bondholder, the Issuer and the
Company an  investment  letter  stating  in effect  that it is  purchasing  such
participation  interest  for its own  account  and will  not  sell or  otherwise
distribute  such interest  without the consent of the Company and the Bondholder
and compliance with the Issuer's rules and regulations regarding the purchase or
distribution of securities issued by the Issuer.

       Section  6.05.  Consent  of  Bondholder.  Except as  otherwise  expressly
provided in this Financing  Agreement,  any consent by the  Bondholder  required
pursuant to this  Financing  Agreement may be withheld by the Bondholder for any
reasonable cause.

       Section 6.06.  Form and Effective  Date of Notice.  Any request,  demand,
authorization,  direction, notice, consent, waiver or other document provided or
permitted by this Financing Agreement to be made upon, given or furnished to, or
filed with the, the Issuer,  the  Bondholder  or the Company shall be sufficient
for every purpose  hereunder if in writing and (except as otherwise  provided in
this Financing  Agreement)  either (I) delivered  personally to the party or, if
such party is not an individual,  to an officer, partner or legal representative
of the  party to whom  the same is  directed  (provided  that any such  document
delivered personally to the Bondholder must be delivered at its Principal Office
during normal business hours), or (ii) mailed by certified mail, postage prepaid
and addressed as follows:

           (1)   if  to  the  Issuer,  at  105-N  State  Capitol,
Montgomery,    Alabama 36130, Attention:  Finance Director;

          (2)  if to the Bondholder, at 150 Fourth Avenue North,
Nashville, Tennessee  37219, Attention:  Timothy B. Fouts and
Gregory Bowers; and

           (3)   if  to  the Company, at 901 Explorer  Boulevard,
Huntsville,                   Alabama   35806-2807,    Attention:
Chairman of the Board.

The Issuer,  the Bondholder and the Company may specify a different  address for
the receipt of such  documents by mail by giving notice of the change in address
to the other parties named in this Section.

      Section 6.07. Payment of Expenses.  The Company agrees to pay all expenses
of the  Bondholder  (including  reasonable  fees and expenses of its counsel) in
connection  with the  preparation  of the  Financing  Documents  and the related
documentation  and the  consummation  of the  transactions  contemplated  by the
Financing Documents.

      Section 6.08.  Termination.  This Financing Agreement shall
terminate  when all amounts due to the Bondholder  hereunder  and
under the Bond have been fully paid.

      Section 6.09. Successors and Assigns. All covenants and agreements in this
Financing  Agreement  by the Issuer,  the Company or the  Bondholder  shall bind
their respective successors and assigns, whether so expressed or not.

      Section 6.10.  Assignment.  The Company may not assign  its
rights or obligations under this Financing Agreement without  the
prior written consent of the Bondholder.

      Section 6.11. Benefits of Agreement.  Nothing in this Financing Agreement,
express or  implied,  is  intended  to give any  person,  other than the parties
hereto and their  successors and (subject to the  requirements  of Section 6.09)
assigns hereunder,  any benefit or any legal or equitable right, remedy or claim
under this Financing Agreement.

      Section 6.12. Limitation of Liability of Bondholder. The Company agrees to
indemnify,  defend  (with  counsel  satisfactory  to the  Bondholder)  and  hold
harmless the Bondholder against any loss, liability, claim or expense, including
attorneys'   fees,  that  the  Bondholder  may  incur  in  connection  with  its
relationship  with the Company  hereunder,  except for such losses as may result
from the gross  negligence  or willful  misconduct of the  Bondholder  regarding
Advances hereunder. The bondholder shall not be liable to the Company except for
matters resulting from the Bondholder's gross negligence or willful  misconduct,
and liability for all other  matters in connection  therewith is hereby  waived.
The Bondholder and the Company shall not in any event be liable to the other for
special,  consequential,  exemplary  or  punitive  damages  with  respect to the
Advances.

      Section 6.13. No  Warranties.  The Company  recognizes  that the plans and
specifications  for the Project  will be  furnished,  prepared,  revised  and/or
implemented  substantially to the Company's requirements;  therefore, THE ISSUER
MAKES NO EXPRESS OR IMPLIED  WARRANTY OF ANY KIND WHATSOEVER WITH RESPECT TO THE
PROJECT  INCLUDING,  BUT NOT  LIMITED  TO,  THE  MERCHANTABILITY  THEREOF OR THE
FITNESS THEREOF FOR ANY PARTICULAR  PURPOSES;  THE DESIGN OR CONDITION  THEREOF;
THE  WORKMANSHIP,  QUALITY OR  CAPACITY  THEREOF;  COMPLIANCE  THEREOF  WITH THE
REQUIREMENTS OF ANY LAW, RULE  SPECIFICATIONS,  OR CONTRACT  PERTAINING THERETO;
PATENT INFRINGEMENT;  LATENT DEFECTS; OR THAT THE PROCEEDS DERIVED FROM THE SALE
OF THE BOND WILL BE SUFFICIENT TO PAY IN FULL FOR SAME.

<PAGE>
  THIS FIRST  AMENDED AND  RESTATED  LOAN  AGREEMENT,  dated as of April 25,
1997, between the STATE INDUSTRIAL  DEVELOPMENT  AUTHORITY, a public corporation
organized  under the laws of the State of Alabama  (the  "Issuer")  and  ADTRAN,
INC.,  a  corporation  organized  and  existing  under  the laws of the State of
Delaware (the "Company");

                                   WITNESSETH:

      That the parties hereto, intending to be legally bound hereby, and for and
in consideration of the premises and the mutual covenants hereinafter contained,
do hereby covenant, agree and bind themselves as follows:

                                    ARTICLE 1

                                   Definitions

      All capitalized,  undefined terms used herein shall have the same meanings
as  used  in  Article  1 of the  hereinafter  defined  Financing  Agreement.  In
addition, the following words and phrases shall have the following meanings:

      Acquisition  Costs  shall have the  meaning  set forth in  Section  5.1(d)
hereof.

      Amended and Restated Financing  Agreement shall mean the First Amended and
Restated  Financing  Agreement dated as of April 25, 1997 among the Issuer,  the
Company and the Bondholder.

      Default means any Default under this Agreement as specified in and defined
by Section 8.1 hereof.

      Financing  Agreement means the Original Financing Agreement as amended and
restated by the Amended and Restated Financing Agreement.

      Note means the promissory  note delivered by the Company  pursuant to this
Agreement.

       Original Financing  Agreement shall mean that certain Financing Agreement
dated as of January 1, 1995 among the Issuer,  the  Company and AmSouth  Bank of
Alabama.

     Project  means the  Project  Site,  the  Project  Building  and the Project
Equipment, as they may at any time exist.

       Project Building means those certain buildings and structures constructed
on the Project Site, described generally in Exhibit "B" hereto.

      Project Equipment means the personal property and fixtures acquired by the
Company and installed in the Project  Building,  described  generally in Exhibit
"C" hereto.

       Project Site means the real property described in Exhibit "A" hereto.

     State means the State of Alabama.

                                    ARTICLE 2

           Representations, Covenants and Warranties

      Section 2.1.  Representations, Covenants and Warranties  of
the Issuer.  The Issuer represents, covenants and warrants that:

          (1) It is duly organized as a public  corporation under the provisions
     of the  Enabling  Law and is not in  default  under  any of the  provisions
     contained in its certificate of incorporation or in the laws of the State.

           (2) Under the  provisions of the Enabling Law and its  certificate of
     incorporation, it has the power to consummate the transactions contemplated
     by the Financing Documents to which it is a party.

           (3) By proper  corporate  action it has duly authorized the execution
     and  delivery  of the  Financing  Documents  to which it is a party and the
     consummation of the transactions contemplated therein.

            (4) It has  obtained all  consents,  approvals,  authorizations  and
     orders of governmental  authorities  that are required to be obtained by it
     as a condition to the execution and delivery of the Financing  Documents to
     which it is a party.

           (5) The execution  and delivery by it of the  Financing  Documents to
     which  it is a  party  and  the  consummation  by it  of  the  transactions
     contemplated  therein  will not  conflict  with,  be in  violation  of,  or
     constitute  (upon  notice or lapse of time,  or both) a  default  under its
     certificate  of  incorporation,  and,  to  its  knowledge,  any  indenture,
     mortgage, deed of trust or other contract, agreement or instrument to which
     it is a party or is subject,  or any resolution,  order, rule,  regulation,
     writ, injunction, decree or judgment of any governmental authority or court
     having jurisdiction over it.

           (6) The Financing  Documents to which it is a party constitute legal,
     valid and binding  obligations and are enforceable against it in accordance
     with the terms of such  instruments,  except as enforcement  thereof may be
     limited by (i) bankruptcy,  insolvency, or other similar laws affecting the
     enforcement  of  creditors'  rights and (ii) general  principles of equity,
     including the exercise of judicial discretion in appropriate cases.

      Section 2.2.  Representations, Covenants and Warranties  of
the  Company.   The  Company represents, covenants  and  warrants
that:

           (1) It is duly organized as a corporation under the laws of the state
     of its  incorporation  and is not in  default  under any of the  provisions
     contained in its certificate of  incorporation  or bylaws or in the laws of
     the state of its incorporation.

           (2) It has the corporate  power and  authority to own its  properties
     and assets and to carry on its business as now being  conducted and is duly
     qualified to do business in every  jurisdiction  where the character of its
     properties  or  the  nature  of its  activities  makes  such  qualification
     necessary.

           (3)  Its  financial  statements  that  have  been  furnished  to  the
     Bondholder  are  complete  and  correct and fairly  present  its  financial
     condition as of the date or dates indicated and for the periods involved in
     accordance  with  generally  accepted  accounting  principles  applied on a
     consistent  basis.  There  has been no  materially  adverse  change  in its
     financial  condition  or  operations  since  the  date of its  most  recent
     financial statements furnished to the Bondholder.

           (4) It has good and marketable title to all its properties and assets
     reflected on its most recent  balance  sheet  furnished to the  Bondholder,
     except for such  properties  and assets as have been  disposed of since the
     date of such  balance  sheet as no longer  used or useful in the conduct of
     its  business  or as have been  disposed of in the  ordinary  course of its
     business. All such properties and assets are free and clear of liens of any
     nature, except as disclosed in such financial statements.

           (5) It has filed or caused to be filed all  federal,  state and local
     tax returns which are required to be filed by it, and has paid or caused to
     be paid all taxes as shown on such returns or on any  assessments  received
     by it to the extent that such taxes have become due and payable.

          (6) It does not  intend to use any part of the  proceeds  of the Bond,
     and has not incurred any  indebtedness to be reduced,  retired or purchased
     by it out of such  proceeds,  for the purpose of purchasing or carrying any
     margin stock  within the meaning of  Regulation U of the Board of Governors
     of the Federal Reserve System,  and it does not own and has no intention of
     acquiring any such margin stock.

           (7) The execution and delivery of the Financing Documents to which it
     is a party will not involve any prohibited  transaction  within the meaning
     of the Employee Retirement Income Security Act of 1974, as amended (ERISA),
     or the Internal  Revenue  Code.  It has  fulfilled  its  obligations  under
     minimum  funding  standards of ERISA and is in  compliance  in all material
     respects with the applicable provisions of ERISA.

           (8) It has the power to consummate the  transactions  contemplated by
     the Financing Documents to which it is a party.

           (9) By proper  corporate  action it has duly authorized the execution
     and  delivery  of the  Financing  Documents  to which it is a party and the
     consummation of the transactions contemplated therein.

            (10) It has obtained all  consents,  approvals,  authorizations  and
     orders of governmental  authorities  that are required to be obtained by it
     as a condition to the execution and delivery of the Financing  Documents to
     which it is a party.

           (11) The execution  and delivery by it of the Financing  Documents to
     which  it is a  party  and  the  consummation  by it  of  the  transactions
     contemplated  therein will not (i) conflict  with,  be in violation  of, or
     constitute  (upon  notice or lapse of time,  or both) a  default  under its
     certificate of incorporation or bylaws,  any indenture,  mortgage,  deed of
     trust or other contract,  agreement or instrument to which it is a party or
     is subject, or any resolution,  order, rule, regulation,  writ, injunction,
     decree  or  judgment  of  any   governmental   authority  or  court  having
     jurisdiction  over  it  or  (ii)  result  in or  require  the  creation  or
     imposition  of any lien of any  nature  upon or with  respect to any of its
     properties now owned or hereafter  acquired,  except as contemplated by the
     Financing Documents.

           (12) The Financing Documents to which it is a party constitute legal,
     valid and binding  obligations and are enforceable against it in accordance
     with the terms of such  instruments,  except as enforcement  thereof may be
     limited by (i) bankruptcy,  insolvency, or other similar laws affecting the
     enforcement  of  creditors'  rights and (ii) general  principles of equity,
     including the exercise of judicial discretion in appropriate cases.

           (13) There is no action, suit,  proceeding,  inquiry or investigation
     pending before any court or governmental  authority,  or threatened against
     it or affecting it or its properties, that (i) involves the consummation of
     the transactions contemplated by, or the validity or enforceability of, any
     of the Financing  Documents or (ii) could have a materially  adverse impact
     upon its financial condition or operations.

           (14) The Project  constitutes a "project" of the type  authorized and
     permitted by the Enabling Law.

           (15)  The  Company  is duly  qualified  and  authorized  to  transact
     business in the State of Alabama.

            (16) No investment bankers or underwriters are providing services of
     any nature in  connection  with the  issuance  and sale of the Bond and the
     various transactions associated therewith.



                                    ARTICLE 3

                              Issuance of the Bond

      Section  3.1.  Agreement to Issue the Bond;  Loan  of  Bond
Proceeds.

       The Issuer,  concurrently  with the  execution  of this  Agreement,  will
issue, sell, and deliver the Bond in accordance with the provisions of Article 4
of the Financing  Agreement and will loan the proceeds thereof to the Company in
accordance with the provisions of Article 4 of this Agreement.

                                    ARTICLE 4

                                    The Loan

     Section 4.1. Loan of Bond  Proceeds.  The Issuer does hereby loan and agree
to loan the  principal  amount of the  Advances  with respect to the Bond to the
Company, and the Company does hereby borrow and agree to borrow such amount from
the  Issuer.  The  Company  shall  execute  and  deliver the Note in the form of
Exhibit D hereto in evidence of such loan. The Issuer shall cause the Bondholder
to deliver the proceeds of the Advances  directly to the Company,  whereupon the
amount of the Advances  shall be deemed to have been loaned by the Issuer to the
Company under this Agreement. The proceeds of the Advance under this Amended and
Restated Loan Agreement (in addition to the Advance under the Original Financing
Documents)  shall be  $30,000,000,  and the Issuer will cause the  Bondholder to
deliver such  proceeds to the Company  contemporaneously  with the execution and
delivery hereof.

     Section 4.2.  Loan Payments.

      (a) The  Company  hereby  covenants  and  agrees  that on or  before  each
Interest  Payment  Date and on or before each Bond  Payment Date for the Bond or
any other date on which Debt Service on the Bond is required to be paid pursuant
to the  Financing  Agreement,  until the  principal  of,  premium,  if any,  and
interest  on the Bond shall have been fully paid or  provision  for the  payment
thereof shall have been made,  the Company shall pay, in  immediately  available
funds,  to the  Bondholder as assignee of the Issuer,  amounts which will at all
times be sufficient to pay the amount  payable on each such date as principal of
(whether at maturity, upon redemption or acceleration or otherwise), premium, if
any,  and  interest on the Bond as provided in the  Financing  Agreement.  It is
understood and agreed that all payments  payable by the Company under subsection
(a) of this Section 4.2 have been assigned by the Issuer to the Bondholder.  The
Company  assents to such  assignment.  The Issuer hereby directs the Company and
the Company hereby agrees to pay to the  Bondholder all payments  payable by the
Company  pursuant to this subsection by wire transfer or other same-day funds to
an account designated by the Bondholder.

      (b) The Company  will also pay, as  additional  payments,  the  reasonable
expenses of the Issuer related to the issuance of the Bond. The Issuer  reserves
the right to adopt and impose an  administrative  fee to be paid annually by the
Company to the Issuer during the term of the Bond (such fee not to exceed 1/10th
of 1% of the principal  amount of Bond  outstanding),  and the Company agrees to
pay such administrative fee to the Issuer if, as and when, requested.

      (c) If the  Company  should fail to make any of the  payments  required in
this Section 4.2, the item or  installment  so in default  shall  continue as an
obligation  of the  Company  until the amount in  default  shall have been fully
paid,  and the  Company  agrees to pay the same with  interest  thereon,  to the
extent  permitted  by law,  from the date  when  such  payment  was due,  at the
applicable Post Default Rate.

      Section 4.3. Obligations of Company Unconditional.  The obligations of the
Company to make the payments  required in Section 4.2 and to perform and observe
the other agreements  contained herein shall be absolute and  unconditional  and
shall not be subject to any  defense  or any right of  setoff,  counterclaim  or
recoupment  arising  out of any  breach by the Issuer or the  Bondholder  of any
obligation  to  the  Company,  whether  hereunder  or  otherwise,  or out of any
indebtedness  or liability at any time owing to the Company by the Issuer or the
Bondholder, and shall not be affected by the occurrence of any event which might
otherwise  give rise to a claim of failure of  consideration  or  frustration of
purpose.  Until such time as the principal of, premium,  if any, and interest on
the Bond  shall  have been  fully  paid,  the  Company  (i) will not  suspend or
discontinue any payments  provided for in Section 4.2 hereof,  (ii) will perform
and observe all other agreements contained in this Agreement and (iii) except as
otherwise  provided  herein,  will not terminate  this  Agreement for any cause.
Nothing  contained in this Section shall be construed to release the Issuer from
the  performance of any of the agreements on its part herein  contained,  and in
the event the Issuer should fail to perform any such  agreement on its part, the
Company may  institute  such  action  against the Issuer as the Company may deem
necessary  to compel  performance  so long as such action does not  abrogate the
obligations of the Company contained in the first sentence of this Section.

      Section  4.4.  Delivery of Note.  Simultaneously  with the delivery of the
Bond,  the Company  shall  execute and  deliver the Note to the  Bondholder,  as
assignee of the Issuer,  in a principal  amount  equal to  $50,000,000  (or such
lesser  amount  as shall  equal the  aggregate  unpaid  principal  amount of the
Advances),  and payable at times and in amounts  corresponding  to the  required
payments of Debt Service on the Bond.  The Note shall be considered  evidence of
and security for the Company's  obligation  to make loan payments  under Section
4.2(a) of this  Agreement.  All loan payments made pursuant to Section 4.2(a) of
this Agreement  with respect to the Bond shall be credited  against the required
payments under the Note, all to the end that the unpaid  principal amount of the
Bond shall be equal to the unpaid  principal  amount of the Note.  Whenever  all
Debt  Service on the Bond has been fully  paid,  the Note shall be deemed  fully
paid,  and the Issuer shall cause the  Bondholder  to surrender  the Note to the
Company.


                                    ARTICLE 5

                                   The Project

      Section 5.1.  Acquisition, Construction and Installation of
the Project.

      (a) The real  property,  building(s),  structure(s)  and  equipment  to be
acquired,  constructed  and  installed by the Company as part of the Project are
described in Exhibits A, B and C.

      (b)  The  Company  may  cause  changes  or  amendments  to be  made in the
description  of the Project,  provided that such changes or amendments  will not
change the nature of the  Project to the extent  that it would not  qualify  for
financing under the Enabling Law.

     (c) The Issuer  shall  cause the Advance of  $30,000,000  to be made by the
Bondholder  with respect to the Bond and will loan the  proceeds  thereof to the
Company under the  provisions of Article 4 of this  Agreement  contemporaneously
with the execution and delivery  hereof.  The proceeds of the Advance and of the
corresponding  loan  hereunder  shall  be  applied  solely  to  the  payment  or
reimbursement of Acquisition Costs and Costs of Issuance.

      (d) For purposes of this  Agreement,  the term  "Acquisition  Costs" shall
mean all costs of acquiring,  constructing and installing the Project, including
without limitation:

           (1)   all  costs  related to the acquisition  of  real
     property or any interest therein,

            (2)   the  cost  of  labor,  materials  and  supplies
     furnished   or   used  in  the  construction,  installation,
     renovation, or rehabilitation of buildings and structures,

          (3)  acquisition, transportation and installation costs
     for personal property and fixtures,

           (4)   fees  for architectural, engineering, legal  and
     supervisory services,

          (5)  expenses incurred in the enforcement of any remedy
     against  any contractor, subcontractor, materialman, vendor,
     supplier or surety,

           (6) interest  accruing on indebtedness  incurred by the Issuer or the
     Company  (including  the  Bond)  in  connection  with the  acquisition  and
     construction of, or other work on, the Project for the period ending on the
     date the Project is placed in service,

          (7)  fees for an appraisal of the Project,

           (8)   insurance premiums and taxes incurred until  the
     Project is (or was) placed in service, and

           (9)   any  fee payable to the Bondholder in connection
     with its commitment to purchase the Bond.

       Section  5.2.   Requests  for  Advances.   [This   Section
intentionally omitted.]

      Section 5.3.  Completion of the Project.  The completion of
the  Project shall be evidenced by a certificate delivered to the
Bondholder  and  the  Issuer and signed by an Authorized  Company
Representative stating that

           (1) the acquisition, construction and installation of the Project has
     been  completed in accordance  with the plans and  specifications  therefor
     (including  any  changes or  amendments  to such  plans and  specifications
     pursuant to Section 5.1), and

          (2) all amounts  due for labor,  materials,  supplies  and other costs
     incurred in connection with the acquisition,  construction and installation
     of the Project have been paid.

                                    ARTICLE 6

                                Special Covenants

     Section 6.1. Further Assurances and Corrective Instruments.  The Issuer and
the Company agree that they will,  from time to time,  execute,  acknowledge and
deliver, or cause to be executed,  acknowledged and delivered,  such supplements
hereto and such further  instruments  as may reasonably be required for carrying
out the expressed intention of this Agreement.

      Section  6.2.  Issuer  and  Company  Representatives.  Whenever  under the
provisions  of this  Agreement  the  approval  of the  Issuer or the  Company is
required  or the Issuer or the  Company is  required  to take some action at the
request of the  other,  such  approval  or such  request  shall be given for the
Issuer  by an  Authorized  Issuer  Representative  and  for  the  Company  by an
Authorized Company Representative.  The Bondholder shall be authorized to act on
any such approval or request.

      Section 6.3. Financial Reports. So long as any portion of the Bond remains
outstanding  and unpaid,  the Company  shall furnish or cause to be furnished to
the Issuer and to the Bondholder the information furnished by the Company to its
public  shareholders  in the forms and at the times so furnished  and such other
information as the Issuer or the Bondholder shall reasonably request.

      Section 6.4.  Eligibility of Project for Financing.  The Company makes the
following  representations  and  warranties  regarding  the  eligibility  of the
Project for financing under the Enabling Law:

           (a) The Project will be used in a trade or business  described in SIC
     Code Major Group 36.

           (b) Either (1) the average hourly wage for full-time hourly wage paid
     employees at the Project will be at least $8.00 per hour or (2) the average
     total compensation (including benefits) for full-time paid employees at the
     Project will be at least equivalent to $10.00 per hour.

            (c)  The  Company   expects  and  agrees  to  invest   approximately
     $20,000,000  in  the  Project  within  twenty-four  (24)  months  from  the
     commencement of  construction of the Project and anticipates  investing not
     less than an additional  $30,000,000  in the Project by not later than five
     years  thereafter.  In any event, the Company's  capital  investment in the
     Project shall equal or exceed the aggregate Advances.

           (d) The Company  expects and agrees to employ at least 250  full-time
     new  employees  at the  Project  within  18  months  from the date that the
     Project is placed in service.  The Company  also  anticipates  employing at
     least 500 additional  full-time  employees within the following five years.
     For purposes of this  paragraph,  the Company will subtract from the number
     of new employees  employed at the Project the total number of employees who
     have been laid off by the Company in Alabama during the two years preceding
     the date of delivery of this Agreement.  The term "new employees"  includes
     only those  individuals  (i) who have not  previously  been employed by the
     Company in Alabama; (ii) will be employed at the Project; and (iii) will be
     subject to the personal  income tax imposed by Section  40-18-2 of the Code
     of Alabama (1975) upon commencement of employment at the Project.

           (e) The Company did not commence the  acquisition or  construction of
     the Project prior to the date of the  Preliminary  Agreement dated November
     16, 1994 with  respect to the  Project.  For  purposes  of this  paragraph,
     preliminary expenditures not exceeding 10% of the total cost of the Project
     for items such as  architectural,  engineering,  surveying,  soil  testing,
     feasibility  and similar costs shall not be considered as the  commencement
     of acquisition or construction.

           (f) The amount of Job  Development  Fees (as defined in the  Enabling
     Law)  assessed by the Company and withheld  from the gross wages of its new
     employees  at the  Project  shall not exceed the  amount  permitted  by the
     Enabling  Law and the rules and  regulations  of the Issuer and the Alabama
     Revenue Department.

           (g)  The  Company  has  complied  and  will  comply  with  all of the
     provisions  of the  Enabling  Law and the  Issuer's  rules and  regulations
     applicable to it.

      Failure to comply with  representations  and warranties  contained in this
Section shall not  constitute a Default  under Section 8.1 but shall  constitute
grounds  for  the  reduction,  suspension  or  denial  by  the  Alabama  Revenue
Department of the job development fee and the credits against  corporate  income
taxes granted by the Enabling Law.

     ARTICLE 7

            Assignment; Indemnification; Redemption

      Section 7.1. Assignment. This Agreement may not be assigned, as a whole or
in part,  without the prior written  consent of the  Bondholder  and the Issuer;
provided,  however,  that no  such  assignment  shall,  in the  opinion  of Bond
Counsel, violate any provisions of the Enabling Law.

     Section 7.2.  Release and Indemnification Covenants.

      (a) The Company  shall and hereby  agrees to indemnify and save the Issuer
harmless against and from all claims (including  reasonable fees and expenses of
Issuer's  counsel) by or on behalf of any  person,  firm,  corporation  or other
legal entity arising out of or in connection  with the issuance of the Bond, the
acceptance of the Issuer's duties and  responsibilities  under this Agreement or
the Financing Agreement, the acquisition,  construction,  operation or occupancy
of the Project or the Issuer's  performance  or  observance  of any agreement or
covenant on its part to be observed or  performed  under this  Agreement  or the
Financing Agreement,  including without limitation (1) the offer and sale of the
Bond  or a  subsequent  sale or  distribution  of any of the  Bond,  and (2) the
exercise,  or failure to exercise,  any right,  privilege or power of the Issuer
under this  Agreement.  The Company shall indemnify and save the Issuer harmless
from any such claim  arising as aforesaid,  or in connection  with any action or
proceeding  brought thereon,  and upon notice from the Issuer, the Company shall
defend the Issuer in any such action or proceeding.

      (b)  Notwithstanding  the fact  that it is the  intention  of the  parties
hereto that the Issuer shall not incur any pecuniary  liability by reason of the
terms of this Agreement or the undertakings required of the Issuer hereunder, by
reason of the issuance of the Bond,  by reason of the execution of the Financing
Agreement, by reason of the acquisition, construction, operation or occupancy of
the Project or by reason of the  performance  of any act requested of the Issuer
by  the  Company,  including  all  claims,  liabilities  or  losses  arising  in
connection  with the violation of any statutes or  regulation  pertaining to the
foregoing;   nevertheless,  if  the  Issuer  should  incur  any  such  pecuniary
liability,  then in such event the Company  shall  indemnify and hold the Issuer
harmless against all claims,  demands or causes of action  whatsoever,  by or on
behalf of any person,  firm or  corporation or other legal entity arising out of
the same or out of any  offering  statement  or lack of  offering  statement  in
connection  with the sale or  resale  of the Bond  and all  costs  and  expenses
incurred in connection  with any such claim or in connection  with any action or
proceeding  brought thereon,  and upon notice from the Issuer, the Company shall
defend the Issuer in any such action or proceeding. All references to the Issuer
in this Section shall be deemed to include its directors,  officers,  employees,
and agents.

      Notwithstanding  anything to the contrary  contained  herein,  the Company
shall  have no  liability  to  indemnify  the Issuer  against  claims or damages
resulting  exclusively  from  the  Issuer's  own  gross  negligence  or  willful
misconduct.

      Section  7.3.  Redemption  of Bond.  The Company  shall have and is hereby
granted  the option to cause all or a portion of the Bond to be  redeemed at the
times permitted by the Financing  Agreement.  The Issuer,  at the request of the
Company,  shall  forthwith  take all steps  (other than the payment of the money
required  for  such  redemption)   necessary  under  the  applicable  redemption
provisions of the Financing Agreement to effect redemption of all or part of the
Bond,  as may be  specified  by the Company,  on the date  established  for such
redemption.  So long as no Loan Default exists,  the Company shall be authorized
to take all steps necessary on behalf of the Issuer to effectuate  redemption of
the Bond.

      Section 7.4.  Issuer to Grant  Security  Interest to the  Bondholder.  The
parties hereto agree that pursuant to the Financing Agreement,  the Issuer shall
assign to the  Bondholder,  in order to secure  payment of the Bond,  all of the
Issuer's right,  title,  and interest in and to this  Agreement,  except for the
Issuer's rights under Sections 4.2(b), 7.2, 8.4 and 10.2 hereof.


                                    ARTICLE 8

                              Defaults and Remedies

      Section 8.1.  Defaults  Defined.  The following shall be "Defaults"  under
this  Agreement and the term "Default"  shall mean,  whenever it is used in this
Agreement, any one or more of the following events:

           (a)  Failure by the  Company to pay any  amount  required  to be paid
     under subsection (a) of Section 4.2 hereof.

           (b)  Failure by the  Company to observe  and  perform  any  covenant,
     condition or agreement on its part to be observed or performed,  other than
     as  referred to in Section  8.1(a),  for a period of thirty (30) days after
     written notice  specifying  such failure and requesting that it be remedied
     shall  have been  given to the  Company  by the  Issuer or the  Bondholder,
     unless the Issuer and the Bondholder shall agree in writing to an extension
     of such time prior to its  expiration;  provided,  however,  if the failure
     stated in the notice cannot be corrected within the applicable  period, the
     Issuer and the Bondholder will not  unreasonably  withhold their consent to
     an extension of such time if corrective action is instituted by the Company
     within the applicable  period and diligently  pursued until such failure is
     corrected.

           (c)  The  dissolution  or  liquidation  of  the  Company,  except  as
     authorized  by Section  2.2  hereof,  or the  voluntary  initiation  by the
     Company  of any  proceeding  under any  federal  or state law  relating  to
     bankruptcy, insolvency, arrangement,  reorganization,  readjustment of debt
     or any other form of debtor relief,  or the initiation  against the Company
     of any such proceeding which shall remain  undismissed for sixty (60) days,
     or failure by the  Company  to  promptly  have  discharged  any  execution,
     garnishment  or attachment of such  consequence as would impair the ability
     of the Company to carry on its operations at the Project,  or assignment by
     the Company for the benefit of creditors,  or the entry by the Company into
     an agreement of composition with its creditors or the failure  generally by
     the Company to pay its debts as they become due.

           (d)   The occurrence of an Event of Default under  the
     Financing Agreement.

      Section  8.2.  Remedies on Default.  Whenever  any Default  referred to in
Section 8.1 hereof shall have happened and be continuing, the Bondholder, or the
Issuer  with  the  written  consent  of  the  Bondholder,  may  take  one or any
combination of the following remedial steps:

            (a) If the  Bondholder  has  declared the Bond  immediately  due and
     payable  pursuant to Section 5.02 of the  Financing  Agreement,  by written
     notice to the Company,  declare an amount equal to all amounts then due and
     payable on the Bond,  whether by  acceleration  of maturity (as provided in
     the Financing Agreement) or otherwise, to be immediately due and payable as
     liquidated damages under this Agreement and not as a penalty, whereupon the
     same shall become immediately due and payable;

           (b)  Declare  the  principal  of  the  Note  to be  due  and  payable
     immediately,  and upon any such declaration the same shall become and shall
     be immediately  due and payable,  anything in this Agreement or in the Note
     to the contrary notwithstanding; or

           (c) Take whatever action at law or in equity may appear  necessary or
     desirable to collect the amounts then due and  thereafter to become due, or
     to enforce  performance  and  observance  of any  obligation,  agreement or
     covenant of the Company under this Agreement.

      Any amounts collected pursuant to action taken under this Section shall be
paid first to the  Bondholder  to the extent  necessary to pay all  indebtedness
then  outstanding,  and  thereafter  to the Issuer;  it being  understood,  that
notwithstanding  any other  provision of this Agreement,  any amounts  collected
upon default, shall be applied first to any amounts due to the Issuer's attorney
for fees and expenses as provided in Section 8.4 hereof.

      Section  8.3. No Remedy  Exclusive.  No remedy  herein  conferred  upon or
reserved to the Issuer or the  Bondholder  is intended  to be  exclusive  of any
other  available  remedy or  remedies,  but each and every such remedy  shall be
cumulative  and shall be in  addition  to every  other  remedy  given under this
Agreement or now or hereafter existing at law or in equity. No delay or omission
to exercise any right or power  accruing  upon any Default shall impair any such
right or power or shall be construed to be a waiver thereof,  but any such right
or power  may be  exercised  from  time to time  and as  often as may be  deemed
expedient.  In order to entitle the Issuer or the  Bondholder  to  exercise  any
remedy  reserved to it in this  Article,  it shall not be  necessary to give any
notice,  other than such notice as may be required in this Article.  Such rights
and  remedies  as are  given  the  Issuer  hereunder  shall  also  extend to the
Bondholder,  and the  Bondholder,  subject to the  provisions  of the  Financing
Agreement,  shall be  entitled to the benefit of all  covenants  and  agreements
herein contained.

     Section 8.4. Agreement to Pay Attorneys' Fees and Expenses.  If the Company
should  default  under any of the  provisions  of this  Agreement and the Issuer
should employ  attorneys or incur other  expenses for the collection of payments
required  hereunder or the  enforcement  of  performance  or  observance  of any
obligation or agreement on the part of the Company herein contained, the Company
agrees that it will on demand  therefor pay to the Issuer the  reasonable fee of
such attorneys and such other expenses so incurred by the Issuer.

      Section 8.5. No Additional  Waiver Implied by One Waiver. If any agreement
contained in this  Agreement  should be breached by either party and  thereafter
waived by the other party, such waiver shall be limited to the particular breach
so waived and shall not be deemed to waive any other breach hereunder.


                                    ARTICLE 9

                            Prepayment and Redemption

      Section 9.1. Prepayment and Redemption.  The Company shall have the option
to prepay its  obligations  hereunder and under the Note at the times and in the
amounts as  necessary to exercise its option to cause the Bond to be redeemed as
set forth in Section  4.02 of the  Financing  Agreement  and Section 7.3 of this
Agreement.  The Issuer, at the request of the Company,  shall forthwith take all
steps  (other  than the  payment  of the  money  required  for such  redemption)
necessary under the applicable  redemption provisions of the Financing Agreement
to effect  redemption  of all or part of the Bond,  as may be  specified  by the
Company, on the date established for such redemption.


                                   ARTICLE 10

                                  Miscellaneous

      Section 10.1. Term of Agreement. This Agreement shall remain in full force
and effect from the date hereof to and including  January 1, 2020, or until such
time as all  indebtedness,  all fees and  expenses of the Issuer and all amounts
payable to the Bondholder  under the Financing  Agreement  shall have been fully
paid.

      Section 10.2. Notices.  All notices,  certificates or other communications
hereunder shall be  sufficiently  given and shall be deemed given when delivered
or mailed by registered mail, postage prepaid, addressed as follows:

If to the Issuer:        State Industrial Development Authority
                    105-N State Capitol
                            Montgomery, Alabama 36130
                           Attention: Finance Director

If to the Company:       ADTRAN, Inc.
                             901 Explorer Boulevard
                         Huntsville, Alabama 35806-2807
                    Attention: Chairman of the Board

If to the Bondholder:    First Union National Bank of Tennessee
                             150 Fourth Avenue North
                           Nashville, Tennessee 37219
                   Attention: Timothy B. Fouts and J. Gregory
Bowers

A  duplicate  copy of each  notice,  certificate  or other  communication  given
hereunder  by the Issuer or the Company  shall also be given to the  Bondholder.
The  Issuer,  the  Company,  and the  Bondholder  may, by written  notice  given
hereunder,  designate  any further or different  addresses  to which  subsequent
notices, certificates or other communications shall be sent.

      Section 10.3.  Binding Effect.  This Agreement shall  inure
to  the  benefit  of and shall be binding upon  the  Issuer,  the
Company,  the  Bondholder  and their  respective  successors  and
assigns.

      Section 10.4.  Severability.  If any provision of this Agreement  shall be
held  invalid or  unenforceable  by any court of  competent  jurisdiction,  such
holding shall not invalidate or render unenforceable any other provision hereof.

       Section 10.5.  Amendments,  Changes and Modifications.  Subsequent to the
issuance of the Bond and prior to its payment in full,  and except as  otherwise
herein  expressly  provided,  this  Agreement  may not be  effectively  amended,
changed,  modified,  altered or  terminated  without the written  consent of the
Bondholder.

      Section  10.6.   Execution  in   Counterparts.   This   Agreement  may  be
simultaneously  executed  in  several  counterparts,  each of which  shall be an
original and all of which shall constitute but one and the same instrument.

      Section  10.7.   Applicable Law.  This Agreement  shall  be
governed  by  and construed in accordance with the  laws  of  the
State.

      Section 10.8.  Captions.  The captions and headings in this
Agreement are for convenience only and in no way define, limit or
describe  the  scope or intent of any provisions or  Sections  of
this Agreement.

      IN WITNESS WHEREOF,  the Issuer and the Company have caused this Agreement
to be  executed  in  their  respective  corporate  names  and  their  respective
corporate  seals to be hereunto  affixed and  attested by their duly  authorized
officers, all as of the date first above written.

                                     STATE INDUSTRIAL DEVELOPMENT
                                     AUTHORITY


                                     By:  /s/ Ira J. Silverman
[S E A L]
                                     Title: President
Attest:

By:  /s/G. Sage Lyons

Title: Secretary
                                      ADTRAN, INC.


                                      By: /s/Mark C. Smith
[S E A L]
                                     Title: CEO and Chairman of the Board
Attest:

By: /s/Lonnie S. McMillian

Title: Senior Vice President


                                    EXHIBIT A

                                  Project Site


      The following  described  real estate  situated in the City of Huntsville,
Madison County, Alabama:

                Lot 5, Block 1, according to the map of survey of Replat of Part
          of Block 1, Lots 4 & 5,  Cummings  Research  Park West, as recorded in
          Plat  Book 25 at page 82 in the  Office  of the  Judge of  Probate  of
          Madison County, Alabama.

                Lots 7 & 8,  Block 1 of the Plat of Part of  Blocks 1, 4, 5, and
          6,  Cummings  Research Park West, as recorded in Plat Book 22, page 54
          Probate Records of Madison County, Alabama.


                                    EXHIBIT B

                                Project Building

      ADTRAN  Phase  III is a  facilities  expansion  project  to meet  ADTRAN's
growing space requirements due to company growth.  The building  facilities will
be expanded on property  already  acquired by/for ADTRAN,  in Cummings  Research
Park West,  Huntsville,  Alabama,  including a 21.68 acre site purchased in 1990
and a 14.2 acre site purchased in 1993.

      The Phase III  building  expansion  will  include:  a 125,000  square foot
(M/L),  5-story  building for office and laboratory  space; a 35,000 square foot
(M/L), 1-story building for manufacturing/assembly; a 70,000 square foot 1-story
highbay warehouse facility;  parking facilities for 1,000 cars; and related site
and utility improvements.


                                   EXHIBIT C

                                Project Equipment

     The Equipment will consist, inter alia, of the following:

           (a) All  equipment  in any of its forms,  now or  hereafter  existing
     (including,  but not limited to, all  industrial  machinery,  computers and
     related  equipment,   electronic  testing  equipment,   materials  handling
     equipment,  equipment and fixtures,  office  machinery,  furniture,  tools,
     spare  parts and  building  materials)  and all  goods  and other  tangible
     personal  property of the Company acquired or to be acquired by the Company
     in conjunction with the Project.

          (b)  to the extent not described above, all fixtures of
     the Company now or hereafter located on the Project Site;

           (c) Any and all  accessions  and additions  now or hereafter  made or
     added to any of the property described in subparagraphs (a) and (b), above,
     any  substitutions  and  replacements  therefor,  and all  attachments  and
     improvements now or hereafter placed upon or used in connection  therewith,
     or any part thereof.


                                    EXHIBIT D

                         First Amended and Restated Note

$50,000,000.00                           ______________, ________
                                               ____________, 1997

      FOR VALUE RECEIVED,  ADTRAN, INC., a Delaware corporation (the "Company"),
hereby promises to pay to the order of FIRST UNION NATIONAL BANK OF TENNESSEE, a
national  banking  association,  with  its  principal  office  in  the  City  of
Nashville, Tennessee, as assignee under the Financing Agreement described below,
or its assigns, the principal amount of

            FIFTY MILLION DOLLARS ($50,000,000.00),

or such lesser amount as may be outstanding hereunder,  and to pay interest from
the date hereof until payment in full of the unpaid principal  balance hereof at
times and in amounts  corresponding  to  payments  due under the Loan  Agreement
described below with respect to the Bond described below.

      This note is issued to evidence and secure the loan repayment  obligations
of the Company under that certain Loan Agreement dated as of January 1, 1995 and
amended and  restated as of April 25,  1997 (the "Loan  Agreement")  between the
State Industrial Development Authority, a public corporation organized under the
laws of the State of Alabama (the  "Issuer"),  and the  Company.  The Issuer has
issued its Taxable Revenue Bond, Series 1995 (ADTRAN, Inc. Project) (the "Bond")
pursuant to that certain  Financing  Agreement  dated as of January 1, 1995 (the
"AmSouth Financing  Agreement") among the Issuer,  ADTRAN,  Inc. (the "Company")
and AmSouth Bank of Alabama ("AmSouth").  First Union National Bank of Tennessee
(the "Bondholder") has agreed to purchase the Bond and to make a further advance
to be evidenced by the Bond pursuant to a Financing  Agreement dated as of April
25,  1997 (the  "Financing  Agreement")  among the  Issuer,  the Company and the
Bondholder.  Pursuant to the Loan Agreement,  the Issuer has loaned the proceeds
of the Bond to the Company,  and the Company has agreed to make loan  repayments
at times and in amounts sufficient to pay the principal of, premium (if any) and
interest  on the Bond.  Pursuant  to the  Financing  Agreement  the  Issuer  has
assigned to the Bondholder substantially all its rights under the Loan Agreement
and this note.

      The payments due on this note shall  correspond  to the payments due under
the Loan  Agreement  with respect to principal of, premium (if any) and interest
on the Bond.  The terms of payment  of  principal,  premium  and  interest  with
respect to the Bond issued under the Financing  Agreement (and the corresponding
payments  under the Loan  Agreement)  are hereby adopted by reference and made a
part of this note as if set out herein in full. The outstanding principal amount
of the Bond shall be deemed to be the outstanding principal amount of this note.

      This note shall be subject to prepayment prior to maturity at times and in
amounts  corresponding to the Financing Agreement provisions with respect to the
redemption of the Bond.  Any notice of redemption of the Bond shall be deemed to
be a notice of prepayment of this note.

      If an event of  default  occurs and is  continuing  under the terms of the
Loan Agreement,  the principal of this note and the interest  accrued hereon may
be declared  due and  payable in the manner and with the effect  provided in the
Loan Agreement.

      IN WITNESS WHEREOF, the Company has caused this note to be executed in its
name and on its behalf by the undersigned officer.

                                             ADTRAN, INC.

                         By:

                         Title:  
                                
<PAGE>
                State Industrial Development Authority (Alabama)
                         Taxable Revenue Bond, Series 1995
                              (ADTRAN, Inc. Project)


       The  STATE  INDUSTRIAL   DEVELOPMENT   AUTHORITY,  a  public  corporation
organized  under  the laws of the State of  Alabama  (the  "Issuer"),  for value
received,  hereby promises to pay to the registered owner  identified  below, or
its   registered   assigns,   the  principal   sum  of  FIFTY  MILLION   DOLLARS
($50,000,000),  or such  lesser  amount  as shall  equal  the  aggregate  unpaid
principal  amount of the Advances made by the Bondholder to the Issuer under the
Financing  Agreement  referred to below, on January 1, 2020, and to pay interest
on the  unpaid  principal  amount  of each  such  Advance  from the date of such
Advance  until such Advance  shall be paid in full, at the rate per annum and on
the dates  provided in the  Financing  Agreement.  All payments of principal and
interest  on this bond  shall be made in lawful  money of the  United  States of
America by wire transfer or other  same-day  funds to the account  designated by
the  Bondholder,  except for the final payment of principal  and interest  which
shall be made only upon surrender of this bond to the Issuer.

      This bond is issued under and pursuant to that certain Financing Agreement
dated as of January 1, 1995,  as amended and restated by an Amended and Restated
Financing  Agreement  dated as of April 25,  1997 (the  "Financing  Agreement"),
among the Issuer,  First Union  National Bank of Tennessee,  a national  banking
association, with its principal office in the City of Nashville,  Tennessee (the
"Bondholder"),  and ADTRAN, Inc., a corporation  organized under the laws of the
State of Delaware  (the  "Company").  Capitalized  terms not  otherwise  defined
herein shall have the meanings assigned in the Financing Agreement.

      Pursuant to the Financing  Agreement,  the Bondholder has agreed to make a
loan or loans  (the  "Advances")  to the  Issuer in an  aggregate  amount not to
exceed  $50,000,000  for the  purpose  of  financing  the  costs  of  acquiring,
constructing   and   equipping  of  certain   office,   manufacturing,   design,
engineering, assembling and distribution facilities referred to in the Financing
Agreement as the "Project". As evidence of its repayment obligation with respect
to such Advances, the Issuer has issued this bond.

     Pursuant to a Loan  Agreement  dated as of January 1, 1995,  as amended and
restated as of April 25, 1997 (the "Loan Agreement"), between the Issuer and the
Company,  the  amounts  received as Advances by the Issuer have been and will be
loaned by the Issuer to the  Company  and the  Company  has agreed to repay such
loan or loans at times  and in  amounts  which  will be  sufficient  to pay Debt
Service on this bond when due. The  Company's  repayment  obligations  under the
Loan Agreement are evidenced by the Note.

      Debt Service on this bond is payable solely out of the amounts  payable by
the Company pursuant to the Loan Agreement.  As security for the payment of Debt
Service on this bond,  the Issuer has assigned and pledged to the Bondholder all
right,  title and  interest of the Issuer in and to the Loan  Agreement  and the
Note (except for certain rights personal to the Issuer).

      THIS  BOND IS A LIMITED  OBLIGATION  OF THE  ISSUER  PAYABLE  SOLELY  FROM
AMOUNTS PAYABLE BY THE COMPANY UNDER THE LOAN AGREEMENT AND THE NOTE AND SECURED
SOLELY BY THE PLEDGED REVENUES. THIS BOND WILL NOT CONSTITUTE AN INDEBTEDNESS OR
OTHER LIABILITY OF THE STATE OF ALABAMA OR OF ANY POLITICAL SUBDIVISION THEREOF.
NEITHER  THE  FAITH  OR  CREDIT  OF THE  STATE  OF  ALABAMA  NOR  ANY  POLITICAL
SUBDIVISION THEREOF SHALL BE PLEDGED TO THE PAYMENT OF THIS BOND OR THE INTEREST
THEREON  AND THE  ISSUANCE  OF THIS  BOND  SHALL  NOT  DIRECTLY,  INDIRECTLY  OR
CONTINGENTLY  OBLIGATE THE STATE OF ALABAMA OR ANY POLITICAL SUBDIVISION THEREOF
TO APPLY  MONEY FOR,  OR LEVY OR PLEDGE  ANY FORM OF  TAXATION  WHATEVER  TO THE
PAYMENT OF, THE PRINCIPAL OF, PREMIUM, IF ANY, OR THE INTEREST ON THIS BOND. THE
ISSUER HAS NO TAXING POWER.

      The Issuer may at its option  (exercised  at the direction of the Company)
redeem all or any portion of the  principal of this bond (in integral  multiples
of  $5,000)  at any time  prior to  maturity,  upon the  terms  provided  in the
Financing Agreement.

     The  Bondholder  shall have the option to tender this Bond for  purchase in
whole on April 25, 1999 (or such later date as  provided  under the terms of the
Financing  Agreement).  If not  exercised,  the  Bondholder's  right of optional
tender shall be extended upon the terms provided in the Financing Agreement.

      If an "Event of  Default"  as defined  in the  Financing  Agreement  shall
occur,  the  principal of this bond may become or be declared due and payable in
the manner and with the effect provided in the Financing Agreement.

     This bond is  transferable  on the Bond Register  maintained by the Issuer,
upon  surrender  of this bond for  transfer  at the office of the  Issuer,  duly
endorsed  by,  or  accompanied  by a  written  instrument  of  transfer  in form
satisfactory to the Issuer duly executed by, the registered holder hereof or his
attorney  duly  authorized in writing,  and thereupon  evidence of such transfer
shall be  endorsed by the Issuer on the  certificate  of  registration  attached
hereto.

       No service  charge shall be made for any transfer  hereinbefore  referred
to, but the Issuer may require  payment of a sum  sufficient to cover any tax or
other governmental charge payable in connection therewith.

      The  Issuer,  the  Company  and any agent of the Issuer or the Company may
treat the person in whose name this bond is registered as the owner of this bond
for the purpose of  receiving  payment of Debt  Service on this bond and for all
other purposes  whatsoever,  whether or not any payment on this bond is overdue,
and, to the extent  permitted  by law,  neither the Issuer,  the Company nor any
such agent shall be affected by notice to the contrary.

      No covenant or agreement contained in this bond or the Financing Agreement
shall be deemed to be a covenant or agreement of any officer,  agent or employee
of the Issuer,  and neither any member of the board of  directors  of the Issuer
nor any officer  executing this bond shall be liable  personally on this bond or
be subject to any personal liability or accountability by reason of the issuance
of this bond.

      It is hereby certified, recited and declared that all acts, conditions and
things required to be performed by the Issuer  precedent to and in the execution
and delivery of the Financing Agreement and issuance of this bond do exist, have
happened  and have been  performed  in due time,  form and manner as required by
law.

      IN WITNESS  WHEREOF,  the Issuer has caused this bond to be duly  executed
under its corporate seal.

     Dated:  January 13, 1995.

                                    STATE INDUSTRIAL DEVELOPMENT
                                    AUTHORITY


                                    By: /s/ Ira J. Silverman
                                             Its President
[S E A L]

Attest: /s/G.Sage Lyons
            Secretary



                           Certificate of Registration

      This  bond is  registered  on the  Bond  Register  in the name of the last
person listed below:

   Date of                    Name of           Signature of Authorized
 Registration              Registered Holder      Officer of Issuer

January 13,               AmSouth Bank of
1995                      Alabama
                          First Union National
                          Bank of Tennessee
<PAGE>
          

                   First Amended and Restated Note

$50,000,000.00                                Birmingham, Alabama
                                                   April 25, 1997

      FOR VALUE RECEIVED,  ADTRAN, INC., a Delaware corporation (the "Company"),
hereby promises to pay to the order of FIRST UNION NATIONAL BANK OF TENNESSEE, a
national  banking  association,  with  its  principal  office  in  the  City  of
Nashville, Tennessee, as assignee under the Financing Agreement described below,
or its assigns, the principal amount of

            FIFTY MILLION DOLLARS ($50,000,000.00),

or such lesser amount as may be outstanding hereunder,  and to pay interest from
the date hereof until payment in full of the unpaid principal  balance hereof at
times and in amounts  corresponding  to  payments  due under the Loan  Agreement
described below with respect to the Bond described below.

      This note is issued to evidence and secure the loan repayment  obligations
of the Company under that certain Loan Agreement dated as of January 1, 1995 and
amended and  restated as of April 25,  1997 (the "Loan  Agreement")  between the
State Industrial Development Authority, a public corporation organized under the
laws of the State of Alabama (the  "Issuer"),  and the  Company.  The Issuer has
issued its Taxable Revenue Bond, Series 1995 (ADTRAN, Inc. Project) (the "Bond")
pursuant to that certain  Financing  Agreement  dated as of January 1, 1995 (the
"AmSouth Financing  Agreement") among the Issuer,  ADTRAN,  Inc. (the "Company")
and AmSouth Bank of Alabama ("AmSouth").  First Union National Bank of Tennessee
(the "Bondholder") has agreed to purchase the Bond and to make a further advance
to be evidenced by the Bond pursuant to a Financing  Agreement dated as of April
25,  1997 (the  "Financing  Agreement")  among the  Issuer,  the Company and the
Bondholder.  Pursuant to the Loan Agreement,  the Issuer has loaned the proceeds
of the Bond to the Company,  and the Company has agreed to make loan  repayments
at times and in amounts sufficient to pay the principal of, premium (if any) and
interest  on the Bond.  Pursuant  to the  Financing  Agreement  the  Issuer  has
assigned to the Bondholder substantially all its rights under the Loan Agreement
and this note.

      The payments due on this note shall  correspond  to the payments due under
the Loan  Agreement  with respect to principal of, premium (if any) and interest
on the Bond.  The terms of payment  of  principal,  premium  and  interest  with
respect to the Bond issued under the Financing  Agreement (and the corresponding
payments  under the Loan  Agreement)  are hereby adopted by reference and made a
part of this note as if set out herein in full. The outstanding principal amount
of the Bond shall be deemed to be the outstanding principal amount of this note.

      This note shall be subject to prepayment prior to maturity at times and in
amounts  corresponding to the Financing Agreement provisions with respect to the
redemption of the Bond.  Any notice of redemption of the Bond shall be deemed to
be a notice of prepayment of this note.

      If an event of  default  occurs and is  continuing  under the terms of the
Loan Agreement,  the principal of this note and the interest  accrued hereon may
be declared  due and  payable in the manner and with the effect  provided in the
Loan Agreement.

      IN WITNESS WHEREOF, the Company has caused this note to be executed in its
name and on its behalf by the undersigned officer.

                                             ADTRAN, INC.

                                     By:  /s/ John R. Cooper

                                    Title: Vice President and CFO
 
<PAGE>
                            INVESTMENT AGREEMENT                    
     
                 This Investment  Agreement  ("Agreement") is entered into as of
the 25th day of April , 1997, by and among  ADTRAN,  INC.  (the  "Borrower"),  a
Delaware corporation; FIRST UNION NATIONAL BANK OF TENNESSEE (the "Bondholder"),
a national banking association;  and AMSOUTH BANK OF ALABMA (the "Participant"),
an Alabama banking corporation.

                               W I T N E S S E T H

          WHEREAS,  concurrently with the execution hereof, the State Industrial
Development  Authority  for the State of Alabama (the  "Issuer")  has issued its
Taxable Revenue Bond, Series 1995 (ADTRAN, Inc. Project) in the principal amount
of Fifty  Million and No/100  ($50,000,000.00)  (the"  Bond") to the  Bondholder
pursuant to that First Amended and Restated Financing  Agreement (the "Financing
Agreement") dated as of April 25, 1997 among the Issuer,  the Bondholder and the
Borrower; and

          WHEREAS,  concurrently with the execution hereof, the Borrower and the
Issuer have entered into that First  Amended and Restated  Loan  Agreement  (the
"Loan Agreement") dated as of April 25, 1997, and the Issuer has assigned to the
Bondholder  all of the rights of the Issuer  under the Loan  Agreement  with the
intention  that the Bondholder  enjoy all of the rights of the Issuer  therunder
except to the extent of certain  rights  reserved with respect to certain rights
to notice and "Additional Payments," as defined in the Financing Agreement; and

          WHEREAS,  concurrently  with the execution hereof, as further evidence
of its  obligations  to the  Bondholder  arising under the Loan  Agreement,  the
Borrower has executed  that First  Amended and Restated  Note (the "Note") dated
April 25, 1997 payable to the order of the  Bondholder in the maximum  principal
amount of Fifty Million and No/100 Dollars ($50,000,000.00); and

          WHEREAS,  concurrently with the execution hereof,  the Participant has
acquired a participation interest in the Bond; and WHEREAS, one condition to the
Bondholder's  agreement to purchase the Bond is that the Borrower  shall grant a
first priority lien upon certain deposit accounts maintained with the Bondholder
and the  Participant  to secure the payment of the Note and the Loan  Agreement:
and

          WHEREAS,  it is a further  condition to the Bondholder's  agreement to
purchase  the Bonds  that the  deposits  pledged to secure the Note and the Loan
Agreement be derived from sources other than the proceeds of the Bond; and

          WHEREAS,  the Borrower  desires  assurances  that,  should  either the
Bondholder or the Participant  fail in its obligation to pay to the Borrower the
amount deposited with them and pledged to secure the payment of the Note and the
Loan Agreement upon the payment in full of those obligations,  the Borrower will
have the right to set off the amount of the deposited  funds against the balance
due under the Note and the Loan Agreement:

          NOW,  THEREFORE,  as an inducement to cause the Bondholder to purchase
the Bond, as an inducement to cause the  Participant to acquire a  participation
interest  in the Bond,  and for other  valuable  consideration,  the receipt and
sufficiency of which are acknowledged, it is agreed as follows:


          1.  ESTABLISHMENT AND MAINTENANCE OF BONDHOLDER  ACCOUNT.  Prior to or
concurrently with the execution of this Agreement,  the Borrower has established
a  commercial  money market  deposit  account  with the  Bondholder  bearing the
account number 2020000174613 (the "Bondholder  Account") in the amount of Thirty
Million and No/100 Dollars  ($30,000,000.00).  The  Bondholder  Account has been
established  in the name of the  Borrower  and is and  shall be  subject  to the
restriction that the Borrower shall have no access to the deposited funds absent
the consent of the Bondholder. The interest rate on the Bondholder Account shall
change no more  often  than once per  month.  The  Bondholder  shall  notify the
Participant as these changes occur.

          2. ESTABLISHMENT AND MAINTENANCE OF PARTICIPANT  ACCOUNT.  Prior to or
concurrently with the execution of this Agreement,  the Borrower has established
a  certificate  of deposit  with the  Participant  bearing  the  account  number
28455029  (together with all subsequent  certificates of deposit funded with the
proceeds of the initial  certificate of deposit,  the "Participant  Account") in
the  amount  of  Twenty  Million  and  No/100  Dollars   ($20,000,000.00).   The
Participant  Account has been established in the name of the Borrower and is and
shall be subject to the  restriction  that the Borrower  shall have no access to
the deposited  funds absent the consent of the  Participant  and the Bondholder.
The  Participant  Account shall bear the same rate of interest as the Bondholder
Account.

          3.  SOURCE OF  DEPOSITED  FUND.  Funds  deposited  by the  Borrower to
establish the Bondholder Account and the Participant Account  (collectively the
"Deposit Accounts") shall not be funds that are proceeds of the Bond.

          4.  DEFINITION  OF  SECURED  INDEBTEDNESS.  As used  herein,  "Secured
Indebtedness"  shall mean all present and future debts and other  obligations of
the Borrower evidenced by the Note and the Loan Agreement, as they may hereafter
be amended, modified, extended, renewed or restated, and all obligations arising
hereunder.

          5. SECURITY INTEREST; ASSIGNMENT. To secure the payment of the Secured
Indebtedness,  the  Borrower  hereby  assigns to the  Bondholder  and grants the
Bondholder  a lien and  security  interest  upon the  Deposit  Accounts  and all
replacement   accounts,   however,   denominated,   and  all  proceeds   thereof
(collectively the "Accounts").

          6.  WARRANTIES.   The Borrower warrants and represents to the
Bondholder and the Participant the following:

              a.   TITLE. The Borrower is the sole legal and equitable owner of
 the Accounts.

              b.   NO ENCUMBRANCES.  The Accounts are not subject to any
 assignment,  lien or other encumbrance other than rights in favor of the
 Bondholder  and the Participant pursuant to this Agreement.

              c.   VALID LIEN.  This Agreement provides the Bondholder  with a
valid first priority assignment of and lien interest in the Accounts.

           7.  COVENANTS. The Borrower covenants with the Bondholder as follows:

               a.  NO TRANSFER.   The Borrower shall not sell or assign the
Accounts in whole or in part and will not grant or allow any other lien or
encumbrance to attach  thereto.

               b. NO WITHDRAWAL.  The Borrower shall not withdraw any funds from
the Accounts or convert the Accounts to any other savings instrument or account,
in whole  or in  part,  without  the  prior  specific  written  approval  of the
Bondholder;  provided,  however,  (i) in the  absence  of an  Event  of  Default
hereunder,  the Borrower  shall be entitled to receive  interest  accrued on the
Accounts as such  interest  would  normally  become  payable under the terms and
conditions of the respective account contracts, and (ii) the Borrower may at any
time use funds from the Accounts to prepay the Secured Indebtedness, in whole or
in part.

          8.  PERFECTION.   The  Borrower   acknowledges  and  agrees  that  the
Bondholder Account is a bank deposits that is not presently subject to Article 9
of the Uniform  Commercial  Code as adopted in either  Tennessee  or Alabama and
that the Bondholder's  security  interest therein is duly protected against lien
creditors of the Borrower, bond fide purchasers from the Borrower and the rights
of the Borrower or a Trustee for Borrower  under any filing under the Bankruptcy
Code by the absolute  control of the  Bondholder  as to the right of  withdrawal
from the  Bondholder  Account.  The  Borrower  acknowledges  and agrees that the
certificate of deposit  evidencing the  Participant  Account is an  "instrument"
under  Alabama  law for the purpose of  perfection  and that  possession  of the
certificate  evidencing  the  Participant  Account  from  time  to  time  is the
appropriate means of perfecting a security  interest therein.  Bondholder hereby
appoints  Participant  as the agent of Bondholder for the purposes of possessing
the original  certificates  of deposit  issued with  respect to the  Participant
Account for the purpose of perfecting  Bondholder's security interest therein by
possession.  Should the Bondholder in the future  determine that the filing of a
financing  statement  or other  action is  necessary  or  desirable  as  further
evidence of the  perfection  of the interest of the  Bondholder in the Accounts,
the  Borrower  shall  bear  all  costs of the  preparation  and  filing  of such
financing  statements  or  the  taking  of  such  other  action,  including  the
reasonable fees and expenses of the Bondholder's attorneys.

          9. THE BONDHOLDERS'  RIGHT OF SETOFF.  As a further  inducement to the
Bondholder to purchase the Bond,  the Borrower  hereby grants to the  Bondholder
(and  acknowledges  the existence of) the right of setoff against the Bondholder
Account and grants to the  Bondholder  (and  acknowledges  the  existence  of) a
banker's  lien  against the  Bondholder  Account,  both of which rights serve as
additional security for the Secured Obligations.

          10.  THE  PARTICIPANT'S  RIGHT  OF  SETOFF.  As an  inducement  to the
Participant  to  purchase a  participation  interest in the Bond,  the  Borrower
hereby grants to the Participant  (and  acknowledges the existence of) the right
of setoff against the  Participant  Account and grants to the  Participant  (and
acknowledges the existence of) a banker's lien against the Participant  Account,
both of which rights serve as additional security for the Secured Obligations.

          11.  THE  BORROWER'S  RIGHT OF  SETOFF  AGAINST  THE  BONDHOLDER.  The
Bondholder  hereby grants to the Borrower and  acknowledges the existence of the
Borrower's right to set off the balance of the Bondholder Account against and to
the reduction of all or part of the balance of the Secured  Indebtedness  in the
event that the  Bondholder  should fail to pay to the  Borrower the funds in the
Bondholder  Account upon the tender of full payment of the Secured  Indebtedness
or upon the tender of  partial  payment  thereof,  to the  extent  such  partial
payment is then allocated to the Bondholder's  interest in the Bond by agreement
with the Participant.

          12.  THE  BORROWER'S  RIGHT OF SETOFF  AGAINST  THE  PARTICIPANT.  The
Participant  hereby grants to the Borrower and acknowledges the existence of the
Borrower's  right to set off the balance of the Participant  Account against and
to the reduction of all or part of the Participant Account in the event that the
Participant  should  fail to pay to the  Borrower  the funds in the  Participant
Account upon the tender of full payment of the Secured  Indebtedness or upon the
tender of partial  payment  thereof,  to the extent such partial payment is then
allocated  to the  Participant's  interest  in the  Bond by  agreement  with the
Bondholder.  For this  purpose,  the  parties  agree  that the funds owed by the
Borrower under the Note and the Loan  Agreement  shall be regarded as funds owed
directly to the  Participant  to the extent of the  Participant's  participation
interest  therein  and the  Bondholder  agrees to  credit  against  the  Secured
Indebtedness  any amount applied thereto through the  Participant's  exercise of
this right.

          13. WARRANTY OF THE BONDHOLDER. The Bondholder represents and warrants
that this  Agreement  constitutes a legal,  valid and binding  obligation of the
Bondholder  and is  enforceable  against the  Bondholder in accordance  with its
terms,   except  as  enforcement  hereof  may  be  limited  by  (i)  bankruptcy,
insolvency, or other similar laws affecting the enforcement of creditors' rights
and (ii)  general  principles  of equity,  including  the  exercise  of judicial
discretion in appropriate cases.

          14. EVENT OF DEFAULT DEFINED. The occurrence of any one or more of the
following events shall constitute an Event of Default under this Agreement.

               a. FINANCING AGREEMENTS.  The occurrence of an Event of Default
under the Financing Agreement, the Loan Agreement or the Note.

               b. MONETARY DEFAULT.   The Borrower's failure to pay any amount
due to the Bondholder under this Agreement within five (5) days of demand.

               c. BREACH OF COVENANT.   The Borrower's failure to perform or
observe any obligation or covenant made herein with respect to the Secured
Indebtedness.

               d. BREACH OF WARRANTY. The Borrower's making of any
representation or warranty in connection with this Agreement or the Secured
Indebtedness that is materially false.

          15.  REMEDIES UPON EVENT OF DEFAULT.  Upon the occurrence of an Even
of Default hereunder, the Bondholder (and the Participant as to the right of
setoff) may pursue any or all of the following remedies without any notice to
the Borrower except as required below:

               a.  WITHDRAWAL FROM ACCOUNTS.  The Bondholder may withdraw some
or all of the funds in either or both of the Accounts and apply the proceeds
thereof to the Secured Indebtedness.  The Borrower hereby appoints the
Bondholder as the Borrower's attorney-in-fact for the purpose of withdrawing
funds from the Accounts in such event.

               b. EXERCISE OF SETOFF   Either or both of the Bondholder and the
Participant may exercise its right of setoff and lien against the Accounts.

               c. OTHER REMEDIES.   The Bondholder may pursue any other remedy
that may be available to it under any other document pertaining to the Secured
Indebtedness or that may otherwise be available to the Bondholder at law or
equity.

               d.   APPLICATION  OF  PROCEEDS.   All  amounts  received  by  the
Bondholder  for the  Borrower's  account by exercise of its  remedies  hereunder
shall be applied as follows:  First, to the payment of all expenses  incurred by
the Bondholder in exercising its rights  hereunder,  including  attorney's fees,
and any other  expenses due the  Bondholder  from the Borrower;  Second,  to the
payment of all interest included in the Secured  Indebtedness,  in such order as
the Bondholder may elect; Third, to the payment of all principal included in the
Secured  Indebtedness,  in such order as the Bondholder  may elect;  and Fourth,
surplus to the Borrower or other party entitled thereto.

          16.  PARTICIPATION  AGREEMENT.  As  between  the  Bondholder  and  the
Participant,  certain provisions hereof are subject to additional agreements set
forth in that  Participation  Agreement  dated as of the date hereof between the
Bondholder and the Participant,as it may hereafter be amended from time to time.

          17. EXPENSES Upon demand,  the Borrower will advance to the Bondholder
or, at the  Bondholder's  option,  reimburse the  Bondholder  for, the following
expenses:

               a. TAXES.  All taxes that the Bondholder may be required to pay
because of the Secured Indebtedness (excluding taxes based upon the net income
of the Bondholder) or because of the Bondholder's interest in any property
securing the payment of the Secured Indebtedness;

               b. ADMINISTRATION.  All expenses that the Bondholder may incur in
connection with the preparation, execution, administration or enforcement of
this Agreement or of any other document pertaining to the Secured Indebtedness;

               c. PROTECTION OF COLLATERAL. All cost of preserving or disposin
of any collateral securing the Secured Indebtedness;

               d.  COST OF COLLECTION.  All court cost and other cost of
collecting any debt, overdraft or other obligation included in the Secured
Indebtedness, including compensation for time spent by employees of the
Bondholder;

               e.   LITIGATION.   All  cost   arising   from   any   litigation,
investigation,  or administrative proceeding (whether or not the Bondholder is a
party  thereto)  that  the  Bondholder  may  incur as a  result  of the  Secured
Indebtedness or as a result of the  Bondholder's  association with the Borrower,
including, but not limited to, expenses incurred by the Bondholder in connection
with a case or  proceeding  involving  the  Borrower  under any  chapter  of the
Bankruptcy Code or any successor statute thereto;

               f.  ATTORNEYS FEES.  Reasonable attorneys' fees incurred in
connection with any of the foregoing.

If the Bondholder pays any of the foregoing  expenses,  they shall become a part
of the  Secured  Indebtedness  and  shall  bear  interest  at the  highest  rate
applicable to the Secured  Indebtedness  from time to time. This paragraph shall
remain  in  full  effect   regardless   of  the  full  payment  of  the  Secured
Indebtedness,  the purported termination of this Agreement,  the delivery of the
executed original of this Agreement to the Borrower,  or the content or accuracy
of any representation made by the Borrower to the Bondholder; provided, however,
the  Bondholder  may terminate this paragraph by executing and delivering to the
Borrower a written  instrument  of  termination  specifically  referring to this
paragraph.

          18. CONSENT TO JURISDICTION.  The Borrower hereby irrevocably consents
to the  jurisdiction of the United States District Court for the Middle District
of  Tennessee  and of all  Tennessee  state courts  sitting in Davidson  County,
Tennessee,  for the purpose of any  litigation to which the  Bondholder may be a
party and which  concerns  this  Agreement  or the Secured  Indebtedness.  It is
further agreed that venue for any such action shall lie exclusively  with courts
sitting in  Davidson  County,  Tennessee,  unless the  Bondholder  agrees to the
contrary  in writing.  This  provision  shall  apply to those  matters for which
judicial  proceedings are appropriate under the arbitration  provision set forth
below, and does not limit the effect of the arbitration provision in any way.

          19. NOT  PARTNERS;  NO THIRD PARTY  BENEFICIARIES.  Nothing  contained
herein or in any related  document  shall be deemed to render the  Bondholder  a
partner of the Borrower for any purpose.  This  Agreement  has been executed for
the sole benefit of the  Bondholder and the  Participant,  and no third party is
authorized to rely upon the  Bondholder's  rights  hereunder or to rely upon any
assumption  that the  Bondholder  has or will  exercise  its  rights  under this
Agreement or under any document referred to herein.


          20. NO  MARSHALING  OF ASSETS.  The  Bondholder  may  proceed  against
collateral securing the Secured Indebtedness and against parties liable therefor
in such order as it may elect,  and neither the Borrower nor any creditor of the
Borrower  shall be entitled to require the  Bondholder  to marshal  assets.  The
benefit of any rule of law or equity to the contrary is hereby expressly waived.

          21. NOTICES.  Any communications concerning this Agreement or the
credit described  herein shall be addressed as provided in the Financing
Agreement and further, to the Participant, as follows:

               AmSouth Bank of Alabama
               200 West Clinton Avenue
               Huntsville, Alabama 35801

          22.  NO  RELIANCE  ON  THE   BONDHOLDER'S   ANALYSIS.   The   Borrower
acknowledges and represents  that, in connection with the Secured  Indebtedness,
the Borrower has not relied upon any financial projection, budget, assessment or
other analysis by the Bondholder or upon any representation by the Bondholder as
to the risks,  benefits or prospects of the  Borrower's  business  activities or
present or future  capital needs  incidental  thereto,  all such  considerations
having been examined fully and independently by the Borrower.

          23.  LEGAL AND  BINDING  AGREEMENT.  The  Borrower  warrants  that the
execution and  performance  of this  Agreement  will not violate any judicial or
administrative order or governmental law or regulation,  and that this Agreement
is valid,  binding and  enforceable  in every  respect  according  to its terms,
subject to principles  of equity and laws  applicable to the rights of creditors
generally, including bankruptcy laws.

          24. NO CONSENT  REQUIRED.  The Borrower  warrants that the  Borrower's
execution, delivery and performance of this Agreement do not require the consent
of or the giving of notice to any third party including, but not limited to, any
other lender,  governmental body or regulatory authority, except for the Issuer,
to whom such notice has been given.

          25.  INDULGENCE  NOT  WAIVER.  The  Bondholder's   indulgence  in  the
existence of an Event of Default hereunder or any other departure from the terms
of this  Agreement  shall not  prejudice the  Bondholder's  rights to declare an
Event of Default or otherwise demand strict compliance with this Agreement.

          26.  CUMULATIVE REMEDIES. The remedies provided the Bondholder in this
Agreement are not exclusive of any other remedies that may be available to the
Bondholder under any other document or at law or equity.

          27.  AMENDMENT AND WAIVER IN WRITING.  No provision of this Agreement
can be amended or waived, except by a statement in writing signed by the party
against which enforcement of the amendment or waiver is sought.

          28. ASSIGNMENT.  This Agreement shall be binding upon and inure to the
benefit of the  respective  heirs,  successors and assigns of the parties except
that the  Borrower  shall not  assign  any rights or  delegate  any  obligations
arising  hereunder  without the prior  written  consent of the  Bondholder.  Any
attempted  assignment or delegation by the Borrower  without the required  prior
consent shall be void.

          29. ENTIRE AGREEMENT.  This Agreement and the other written agreements
among the parties represent the entire agreement among the parties concerning
the subject matter hereof, and all oral discussions and prior agreements are
merged herein.

          30.  SEVERABILITY.   Should any provision of this Agreement be invalid
or unenforceable for any reason, the remaining provisions hereof shall remain in
full effect.


          31. TIME OF ESSENCE. Time is of the essence of this Agreement, and all
dates and time periods specified herein shall be strictly observed, except that
the Bondholder may permit specific deviations therefrom by its written consent.

          32. APPLICABLE LAW. The validity, construction and enforcement of this
Agreement shall be determined  according to the laws of Tennessee  applicable to
contracts  executed and performed entirely within that state. In this regard, it
is  acknowledged  that the Note,  Loan  Agreement  and  Financing  Agreement are
governed by the substantive  laws of the State of Alabama,  and the parties wish
for Tennessee law to apply hereto because the  Bondholder  Account is located in
the State of  Tennessee,  where the  Bondholder  has its places of business  and
where all payments on the Secured Indebtedness are due.

          33.  GENDER AND NUMBER.  Words used herein indicating gender or number
shall be read as context may require

          34. CAPTIONS NOT CONTROLLING. Captions and headings have been included
in this Agreement for the convenience of the parties, and shall not be construed
as affecting the content of the respective paragraphs.

          35. ARBITRATION.  Upon demand of any party hereto, whether made before
or  after  institution  of  any  judicial  proceeding,  any  dispute,  claim  or
controversy arising out of, connected with or relating to this Agreement and any
other  of the  Financing  Documents  (as  defined  in the  Financing  Agreement)
("Disputes")  between or among  parties to this  Agreement  shall be resolved by
binding arbitration as provided herein.  Institution of a judicial proceeding by
a party does not waive the right of that party to demand arbitration  hereunder.
Disputes may include, without limitation, tort claims,  counterclaims,  disputes
as to  whether  a matter  is  subject  to  arbitration,  claims  brough as class
actions,  claims arising from  Financing  Documents  executed in the future,  or
claims  arising  out of or  connected  with the  transaction  reflected  by this
Agreement.  Notwithstanding the foregoing,  this arbitration provision shall not
apply to any dispute  between the  Bondholder  and the  Participant to which the
Borrower is not a substantive party.

          Arbitration  shall be conducted  under and governed by the  Commercial
Financial  Disputes  Arbitration Rues (the "Arbitration  Rules") of the American
Arbitration  Association  (the  "AAA")  and  Title  9  of  the  U.S.  Code.  All
arbitration hearings shall be conducted in Nashville,  Tennessee.  The expedited
procedures  set  forth  in Rule 51 et seq.  of the  Arbitration  Rules  shall be
applicable  to  claims of less  that  $1,000,000.  All  applicable  statutes  of
limitation shall apply to any Dispute.  A judgment upon the award may be entered
in any court  having  jurisdiction.  The panel  from which all  arbitrators  are
selected  shall be  comprised  of  licensed  attorneys.  The  single  arbitrator
selected for expedited procedure shall be a retired judge from the highest court
of general  jurisdiction,  state or federal, of the state where the hearing will
be conducted or if such person is not available to serve, the single  arbitrator
may be a licensed  attorney.  Notwithstanding  the foregoing,  this  arbitration
provision does not apply to disputes under or related to swap agreements.

          Notwithstanding  the preceding  binding  arbitration  provisions,  the
Bondholder,  the  Participant  and  the  Borrower  agree  to  preserve,  without
diminution,  certain  remedies  that any party  hereto  may  employ or  exercise
freely,  independently or in connection with an arbitration  proceeding or after
an  arbitration  action is brought.  The  Bondholder,  the  Participant  and the
Borrower shall have the right to proceed in any court of proper  jurisdiction or
by self-help to exercise or prosecute the following remedies, as applicable: (i)
all rights to foreclose  against any real or personal property or other security
by  exercising  a power  of sale  granted  under  Financing  Documents  or under
applicable law or by judicial  foreclosure  and sale,  including a proceeding to
confirm the sale;  (ii) all rights of self-help  including  set-off and peaceful
possession  of personal  property;  (iii)  obtaining  provisional  or  ancillary
remedies including injunctive relief,  sequestration,  garnishment,  attachment,
appointment of receiver and filing an  involuntary  bankruptcy  proceeding;  and
(iv) when  applicable,  a judgment by  confession of judgment.  Preservation  of
these  remedies  does not  limit  the power of an  arbitrator  to grant  similar
remedies that may be requested by a part in a Dispute.

          The Borrower and the  Participant  each agree with the  Bondholder and
the Bondholder  agrees with each of the Borrower and the  Participant  that they
shall not have a remedy of punitive or  exemplary  damages  against the other in
any Dispute and hereby waive any right or claim to punitive or exemplary damages
they have now or which may arise in the future in  connection  with any  Dispute
whether the Dispute is resolved by arbitration or judicially.



          Executed as of the date first written above.


                                  ADTRAN, INC.


                              By:   /s/ John R. Cooper
                                       John R. Cooper

                              Title: Vice President


                            FIRST UNION NATIONAL BANK
                                  OF TENNESSEE


                            By: /s/ Timothy B. Fouts
                                       Timothy B. Fouts

                              Title:   Vice President


                             AMSOUTH BANK OF ALABAMA


                              By:  /s/ Randall S. Phillips
                                       Randall S. Phillips

                                       Title: Vice President
<PAGE>
           
      
                    RESOLUTION AUTHORIZING AMENDMENT OF DOCUMENTS
                RELATING TO $50,000,000 TAXABLE REVENUE BOND, SERIES 1995
                               (ADTRAN, INC. PROJECT)

     WHEREAS, the State Industrial  Development  Authority (the "Authority") has
heretofore issued its Taxable Revenue Bond,  Series 1995 (ADTRAN,  Inc. Project)
in an authorized  principal amount of $50,000,000 (the "Original Bond") pursuant
to that  certain  Financing  Agreement  dated as of  January  1, 1995  among the
Authority,  Adtran, Inc., a corporation organized under the laws of the State of
Delaware (the "Company") and AmSouth Bank of Alabama  ("AmSouth") (the "Original
Financing Agreement");


     WHEREAS,  First  Union  National  Bank of  Tennessee,  a  national  banking
association, with its principal office in the City of Nashville,  Tennessee (the
"Bondholder") has now agreed to purchase the Original Bond from AmSouth,  and to
make a further  Advance to the  Authority in an  aggregate  amount not to exceed
$50,000,000  total authorized  amount  (including the Advance under the Original
Financing Agreement) in order to complete the financing of the Project;

      WHEREAS,the Authority, the Bondholder and the Company have agreed to enter
into a First Amended and Restated Financing Agreement dated as of April 25, 1997
whereby the Authority will issue its Amended and Restated  Taxable  Revenue Bond
Series  1995  (ADTRAN,  Inc.  Project)  in an  authorized  principal  amount  of
$50,000,000 (the "Amended and Restated  Bond");  the Original Bond as amende and
restated by the Amended and Restated  Bond is herein  referred to as the "Bond";
the  Original  Financing  Agreement  as amended and  restated by the Amended and
Restated Financing Agreement is herein referred to as the "Financing Agreement";
the Bond will  continue to evidence the limited  obligation  of the Authority to
repay Advances;

     WHEREAS,  the Authority and the Company have  heretofore  entered into that
certain  Loan  Agreement  dated  as of  January  1,  1995  (the  "Original  Loan
Agreement");  in  connection  with the execution and delivery of the Amended and
Restated Financing Agreement, the Authority and the Company have agreed to enter
into a First Amended and Restated Loan Agreement dated as of April 25, 1997 (the
"Amended and Restated Loan  Agreement";  the Original Loan  Agreement as amended
and restated by the Amended and Restated Loan Agreement is herein referred to as
the "Loan Agreement"),  whereby the Authority will agree to loan the proceeds of
the Bond to the  Company,  and the  Company  will agree to make loan  repayments
sufficient to pay the  principal  of,  premium (if any) and interest on the Bond
("Debt Service") when due; as evidence of its obligation to make loan repayments
with respect to Debt Service on the  Original  Bond,  the Company has issued its
note (the "Original Note") and, in connection with the execution and delivery of
the  Amended  and  Restated  Financing  Agreement,  will issue its  amended  and
restated note (the  "Amended and Restated  Note") as provided in the Amended and
Restated  Loan  Agreement;  the  Original  Note as amended  and  restated by the
Amended and Restated Note is herein referred to as the "Note"

     WHEREAS,  the Bond is a limited  obligation of the Authority payable solely
out of the payments by the Company  pursuant to the Loan  Agreement and the Note
(the "Pledged Revenues");

     WHEREAS,  as  security  for the  payment of Debt  Service on the Bond,  the
Authority  shall  assign  and  pledge to the  Bondholder  all  right,  title and
interest of the Authority in and to the Pledged Revenues, the Loan Agreement and
the Note (except for certain rights personal to the Authority);

     WHEREAS,  it is  contemplated  by the parties that in  connection  with the
execution and delivery of the Amended and Restated  Financing  Agreement (i) the
Bondholder  shall  purchase  the  Original  Bond from AmSouth as provided in the
Amended and Restated Financing Agreement,  (ii) the Authority shall transfer the
Original Bond to the Bondholder  pursuant to the  requirements of the Agreement,
by issuing the  Amended and  Restated  Bond  provided  for under the Amended and
Restated  Financing  Agreement,  (iii) an Advance  will be made  pursuant to the
Amended and Restated Financing Agreement in the principal amount of $30,000,000,
(iv) the Company  shall issue the Amended and  Restated  Note to the  Bondholder
under the terms of the Amended and  Restated  Loan  Agreement,  (v) the Original
Bond shall be delivered to the Authority and cancelled, (vi) the Bondholder will
sell a participation interest in the Bond evidencing the outstanding Advances to
AmSouth pursuant to a Participation  Agreement dated April 25, 1997, between the
Bondholder and AmSouth,  and (vii) upon completion of the transaction  described
therein and herein,  Advances in the total authorized amount of $50,000,000 will
be outstanding under the Financing Agreement;

     WHEREAS,  copies of the proposed Amended and Restated  Financing  Agreement
and Amended and Restated Loan Agreement (herein the "Financing  Documents") have
been  presented  to,  considered  and  approved by the Board of Directors of the
Authority; and

     WHEREAS,  the Board of Directors of the Authority,  upon evidence submitted
to and  considered  by it,  has  found  and  determined  that  the  acquisition,
construction  and equipping of the  Facilities is in  furtherance of the objects
and powers of the  Authority and the purposes for the existence of the Authority
under the laws of the  State of  Alabama  pursuant  to which  the  Authority  is
organized and will promote (i) the increased  development and growth of industry
in the state and (ii) the creation of new jobs within the state;

     NOW, THEREFORE,  BE IT RESOLVED BY THE BOARD OF DIRECTORS OF THE AUTHORITY,
as follows:

          1. The Board of Directors does hereby approve,  authorize,  ratify and
     confirm  (i) the  issuance  of the  Amended  and  Restated  Bond,  (ii) the
     execution  and delivery by the  Authority of the  Financing  Documents  and
     (iii) the consummation of all other transactions  described in the recitals
     to this resolution and  contemplated by the Financing  Documents (the "Plan
     of Financing").

          2.  The  President  or  Vice-President  of the  Authority,  is  hereby
     authorized  and directed to execute and deliver the Financing  Documents to
     which the Authority will be a party in substantially  the form presented to
     the Board of  Directors  at this  meeting  with such  changes or  additions
     thereto or  deletions  therefrom  as the officer  executing  the same shall
     approve, which approval shall be conclusively evidenced by his execution of
     such instruments.  The Secretary of the Authority, is hereby authorized and
     directed to affix the corporate  seal of the Authority to such  instruments
     and to attest the same.

          3. The Amended and Restated  Bond shall be issued under the  Financing
     Agreement as therein  provided.  The Amended and Restated  Bond shall be in
     the form and  shall  contain  the  terms  and  provisions  provided  in the
     Financing  Agreement.  To  the  extent  the  Financing  Agreement  provides
     alternative  methods for  execution of the Amended and Restated  Bond,  the
     officers of the  Authority  executing  the Amended  and  Restated  Bond are
     hereby  authorized to select the method of execution.  The President or the
     Vice  President  of the  Authority  is hereby  authorized  and  directed to
     execute the Amended and Restated Bond on behalf of the  Authority,  and the
     Secretary of the Authority is hereby  authorized  and directed to affix the
     official  corporate  seal of the Authority to the Amended and Restated Bond
     and to attest the same. Upon delivery to the Authority of the Original Bond
     for cancellation,  the officers executing the Amended and Restated Bond are
     hereby  authorized and directed to deliver the Amended and Restated Bond so
     executed to the Bondholder.

          4. The Amended and Restated  Bond shall be sold to the  Bondholder  on
     the terms and conditions contained in the Financing Agreement.

          5. The officers of the Authority and any person or persons  designated
     and  authorized  by any officer of the  Authority to act in the name and on
     behalf of the  Authority,  or any one or more of them, are authorized to do
     and perform or cause to be done and  performed in the name and on behalf of
     the Authority  such other acts, to pay or cause to be paid on behalf of the
     Authority  such related costs and  expenses,  and to execute and deliver or
     cause to be executed and  delivered in the name and behalf of the Authority
     such other notices, requests,  demands,  directions,  consents,  approvals,
     orders,  applications,  certificates,  agreements,  further assurances,  or
     other  instruments  or  communications,  under  the  corporate  seal of the
     Authority,  or  otherwise,  as  they  or any of them  may  deem  necessary,
     advisable,  or  appropriate in order to (i) complete the Plan of Financing,
     (ii) carry into effect the intent of the provisions of this  resolution and
     the Financing Documents,  and (iii) demonstrate the validity of the Amended
     and Restated Bond and the absence of any pending or  threatened  litigation
     with  respect  to the  Bond,  the  Financing  Documents  and  the  Plan  of
     Financing.

          6. Each act of any officer or officers of the  Authority or any person
     or persons  designated  and  authorized to act by the Board of Directors or
     any officer of the Authority,  which act would have been  authorized by the
     foregoing  provisions of this resolution  except that such action was taken
     prior to the adoption of this resolution,  is hereby  ratified,  confirmed,
     approved and adopted.

          7. The firm of Maynard, Cooper & Gale,P.C. is hereby confirmed as bond
     counsel and the firm of Hand Arendall, L.L.C.is hereby confirmed as counsel
     to the Authority

     8. This resolution shall take effect immediately upon its             
<PAGE>
                           
                           RESOLUTIONS OF THE BOARD OF
                            DIRECTORS OF ADTRAN, INC.
                            Adopted on April 23, 1997


      WHEREAS,  the Board of  Directors  of ADTRAN,  Inc.  (the  "Company")  has
determined  that it is in the best  interest  of the  Company to  authorize  the
execution and delivery of (i) an Amended and Restated  Financing  Agreement (the
"Financing  Agreement")  dated  April 25,  1997,  among the  Company,  the State
Industrial Development Authority, a public corporation under the laws of Alabama
(the "Authority") and First Union National Bank of Tennessee (the "Bondholder"),
(ii) an Amended  and  Restated  Loan  Agreement  dated April 25, 1997 (the "Loan
Agreement") between the Authority and the Company, (iii) an Investment Agreement
among the Company,  the  Bondholder  and AmSouth Bank of Alabama dated April 25,
1997 (the "Investment  Agreement"),  and (iv) an Amended and Restated Note dated
April 25, 1997 (the "Note") from the Company to the  Bondholder,  as assignee of
the Authority (said Financing  Agreement,  Loan Agreement,  Investment Agreement
and Note being hereinafter together called the "Financing Documents").

      WHEREAS,  the  Financing  Documents  are being  executed and  delivered in
connection  with the  issuance by the  Authority  of its Taxable  Revenue  Bond,
Series 1997 (ADTRAN,  Inc.  Project) in the principal amount of $50,000,000 (the
"Bond"),  for the  purpose  of  paying a  portion  of the  costs  of  acquiring,
constructing and equipping certain office,  manufacturing,  design,  engineering
and distribution  facilities (the "Facilities") in Huntsville,  Alabama, for use
by the Company;

      WHEREAS,  the Authority and the Company will enter into the Loan Agreement
providing  that the  proceeds of the Bond shall be loaned to the Company for the
purpose of acquiring,  constructing and equipping the Facilities; as evidence of
and as security for the  Company's  obligations  under the Loan  Agreement,  the
Company will issue the Note in the principal  amount of $50,000,000,  payable to
the Bondholder as assignee of the  Authority;  the Note will be payable at times
and in  amounts  corresponding  to the  payment  of debt  service  on the  Bond;
payments by the Company under the Loan  Agreement  will be credited  against the
payments due under the Note; pursuant to the Financing Agreement,  the Authority
will assign and pledge to the  Bondholder all the  Authority's  rights under the
Loan  Agreement,   except  for  certain  rights  relating  to   indemnification,
reimbursement of expenses and receipt of notices and other communications;

      WHEREAS,  copies  of  the  Financing  Documents  have  been presented  to,
considered and approved by the Board of Directors; and

      WHEREAS, the Board of Directors, upon evidence submitted to and considered
by it, has found and determined that the acquisition, construction and equipping
of the Facilities and the execution and delivery of the Financing  Documents are
in the best interest of the Company;

      NOW,  THEREFORE,  BE IT RESOLVED BY THE BOARD OF DIRECTORS OF THE COMPANY,
as follows:

           1. The Board of Directors does hereby approve,  authorize, ratify and
     confirm  the  execution  and  delivery  by the  Company  of  the  Financing
     Documents and the consummation of all other  transactions  described in the
     recitals to this  resolution and  contemplated  by the Financing  Documents
     (the "Plan of Financing").

           2. Mark C. Smith,  Chairman of the Board and Chief Executive  Officer
     of the Company,  is hereby  authorized  and directed to execute and deliver
     the  Financing   Documents  to  which  the  Company  will  be  a  party  in
     substantially  the form presented to the Board of Directors at this meeting
     with such changes or additions  thereto or deletions  therefrom as he shall
     approve, which approval shall be conclusively evidenced by his execution of
     such instruments.  Lonnie S. McMillian, Secretary of the Company, is hereby
     authorized  and directed to affix the corporate seal of the Company to such
     instruments and to attest the same.

          3. The  officers of the  Company and any person or persons  designated
     and  authorized  by any  officer  of the  Company to act in the name and on
     behalf of the Company, or any one or more of them, are authorized to do and
     perform or cause to be done and  performed in the name and on behalf of the
     Company  such  other  acts,  to pay or  cause to be paid on  behalf  of the
     Company  such  related  costs and  expenses,  and to execute and deliver or
     cause to be executed  and  delivered  in the name and behalf of the Company
     such other notices, requests,  demands,  directions,  consents,  approvals,
     orders,  applications,  certificates,  agreements,  further assurances,  or
     other  instruments  or  communications,  under  the  corporate  seal of the
     Company,  or  otherwise,  as  they  or  any of  them  may  deem  necessary,
     advisable,  or  appropriate in order to (i) complete the Plan of Financing,
     (ii) carry into effect the intent of the provisions of this  resolution and
     the Financing  Documents,  and (iii) demonstrate the absence of any pending
     or threatened  litigation with respect to the Bond, the Financing Documents
     and the Plan of Financing.

           4. Each act of any  officer or  officers of the Company or any person
     or persons  designated  and  authorized to act by the Board of Directors or
     any officer of the  Company,  which act would have been  authorized  by the
     foregoing  provisions of this resolution  except that such action was taken
     prior to the adoption of this resolution,  is hereby  ratified,  confirmed,
     approved and adopted.

   


<TABLE>
<CAPTION>
                                                                  EXHIBIT 11

                                    ADTRAN, INC

        WEIGHTED AVERAGE COMMON AND COMMON EQUIVALENT SHARES OUTSTANDING
              For the Three Months Ended March 31, 1996 and 1997

                                                          Three Months Ended
                                                              March 31,
                                                        1996            1997
                                                        ----            ----
<S>                                                  <C>           <C>
Weighted average common shares outstanding.......... 38,295,634     39,030,371
Net weighted average common stock
   options outstanding  under the treasury
   stock method.....................................  1,253,472        526,759
                                                     ----------      ---------
Weighted average common  and common
   equivalent shares  outstanding................... 39,549,106     39,557,130
                                                     ==========     ==========


Net income.........................................  $8,623,388     $9,522,268
                                                     ==========     ==========


Net income per common and common.....
   equivalent share...............................   $      .22     $      .24
                                                     ==========     ==========


</TABLE>

<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED STATEMENT OF INCOME FOR THE THREE MONTHS ENDED MARCH 31, 1997
AND THE CONDENSED BALANCE SHEET AS OF MARCH 31, 1997 AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>                         0000926282
<NAME>                        ADTRAN, INC.
<MULTIPLIER>                  1
<CURRENCY>                    US DOLLAR
       
<S>                           <C>
<PERIOD-TYPE>                 3-MOS
<FISCAL-YEAR-END>             DEC-31-1997
<PERIOD-START>                JAN-01-1997
<PERIOD-END>                  MAR-31-1997
<EXCHANGE-RATE>               1
<CASH>                                         $49,542,844
<SECURITIES>                                    30,550,210
<RECEIVABLES>                                   33,575,563
<ALLOWANCES>                                      (870,842)
<INVENTORY>                                     48,082,345
<CURRENT-ASSETS>                               164,739,843
<PP&E>                                          75,130,234
<DEPRECIATION>                                 (15,350,751)
<TOTAL-ASSETS>                                 224,519,326
<CURRENT-LIABILITIES>                           20,295,962
<BONDS>                                         20,000,000
                                    0
                                              0
<COMMON>                                           392,027
<OTHER-SE>                                     182,229,221
<TOTAL-LIABILITY-AND-EQUITY>                   224,519,326
<SALES>                                         61,230,184
<TOTAL-REVENUES>                                61,230,184
<CGS>                                           29,438,797
<TOTAL-COSTS>                                   29,438,797
<OTHER-EXPENSES>                                10,537,516
<LOSS-PROVISION>                                         0
<INTEREST-EXPENSE>                                 242,534
<INCOME-PRETAX>                                 14,878,545
<INCOME-TAX>                                     5,356,277
<INCOME-CONTINUING>                              9,522,269
<DISCONTINUED>                                           0
<EXTRAORDINARY>                                          0
<CHANGES>                                                0
<NET-INCOME>                                     9,522,269
<EPS-PRIMARY>                                         0.24
<EPS-DILUTED>                                         0.24
        





</TABLE>


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