As filed with the Securities and Exchange Commission on May 28, 1998
                                                  Registration No. 333-         

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                          SECURITIES AND EXCHANGE COMMISSION
                                Washington, D.C. 20549

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

                                       FORM S-8
                                REGISTRATION STATEMENT
                                        UNDER
                              THE SECURITIES ACT OF 1933

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

                             APPLIED DIGITAL ACCESS, INC.
                (Exact name of registrant as specified in its charter)

          DELAWARE                                        68-0132939
(State or other jurisdiction                 (IRS Employer Identification No.)
of incorporation or organization)

                   9855 SCRANTON ROAD, SAN DIEGO, CALIFORNIA 92121
                (Address of principal executive offices)    (Zip Code)

                        1994 STOCK OPTION/STOCK ISSUANCE PLAN
                         1998 EMPLOYEE STOCK PURCHASE PLAN
                  1998 EMPLOYEE STOCK PURCHASE PLAN FOR ADA CANADA
                             (Full title of the plans)

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

                                  Peter P. Savage
                       President and Chief Executive Officer
                            APPLIED DIGITAL ACCESS, INC.
                  9855 SCRANTON ROAD, SAN DIEGO, CALIFORNIA 92121
                      (Name and address of agent for service)
                                   (619) 623-2200
           (Telephone number, including area code, of agent for service)

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

This Registration Statement shall become effective immediately upon filing with
the Securities and Exchange Commission, and sales of the registered securities
will thereafter be effected upon option exercises, share issuances or purchases
effected under the plans.

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

                           CALCULATION OF REGISTRATION FEE


                                                                                                 Proposed
                   Title of                                              Proposed Maximum        Maximum 
                  Securities                          Amount                 Offering           Aggregate             Amount of
                    to be                             to be                   Price              Offering            Registration
                  Registered                       Registered(1)           per Share(2)           Price                  Fee
                  ----------                       -------------         --------------        -----------         --------------
                                                                                                      
1994 STOCK OPTION/STOCK ISSUANCE PLAN
Common Stock, par value $0.001                        300,000              $ 5.41              $ 1,623,000


1998 EMPLOYEE STOCK PURCHASE PLAN
Common Stock, par value $0.001                        300,000              $ 4.60              $ 1,380,000


1998 EMPLOYEE STOCK PURCHASE PLAN FOR
ADA CANADA
Common Stock, par value $0.001                        100,000              $ 4.60              $   460,000


TOTAL                                                 700,000                                  $ 3,463,000         $ 1,021.59



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(1)  This Registration Statement shall also cover any additional shares of
     Common Stock which become issuable under the plans listed above by reason
     of any stock dividend, stock split, recapitalization or other similar
     transaction effected without the receipt of consideration which results in
     an increase in the number of the Company's outstanding shares of Common
     Stock.

(2)  Estimated solely for the purpose of computing the amount of the
     registration fee under Rules 457(h) and 457(c) of the Securities Act of
     1933, as amended. The employee stock purchase plans establish a 
     purchase price equal to 85% of the fair market value of the Company's 
     Common Stock and, therefore, the price for shares issuable under these 
     plans is based on 85% of the average of the high and low prices of the 
     Common Stock on May 22, 1998. As to shares issuable under the 1994 Stock 
     Option/Stock Issuance Plan, the price is based on the average of the 
     high and low prices of the Common Stock on May 22, 1998.



                                       PART II

                  INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.  INCORPORATION OF DOCUMENTS BY REFERENCE

          Applied Digital Access, Inc. (the "Company") hereby incorporates by
reference into this Registration Statement the following documents previously
filed with the Securities and Exchange Commission (the "Commission"):

          (a)  The Company's Annual Report on Form 10-K for the year ended
               December 31, 1997.

          (b)  The Company's Reports on Form 8-K and Form 8-K/A, filed on
               December 23, 1997 and January 12, 1998, respectively, as File No.
               0-23698.

          (c)  The Form 8-A filed by the Company on March 28, 1994 with the
               Commission as Registration No. 0-23698 (and all amendments
               thereto), in which there is described the terms, rights and
               provisions applicable to the Company's outstanding Common Stock.

          All reports and other documents subsequently filed by the Company
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of
1934 (the "1934 Act") prior to the filing of a post-effective amendment which
indicates that all securities offered hereby have been sold or which deregisters
all securities then remaining unsold, shall be deemed to be incorporated by
reference into this Registration Statement and to be a part hereof from the date
of filing of such documents.

Item 4.   DESCRIPTION OF SECURITIES

          Not applicable.

Item 5.   INTERESTS OF NAMED EXPERTS AND COUNSEL

          Not applicable.

Item 6.   INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Section 145 of the Delaware General Corporation Law permits indemnification
of officers and directors of the Company under certain conditions and subject to
certain limitations.  Section 145 of the Delaware General Corporation Law also
provides that a corporation has the power to purchase and maintain insurance on
behalf of its officers and directors against any liability asserted against such
person and incurred by him or her in such capacity, or arising out of his or her
status as such, whether or not the corporation would have the power to indemnify
him or her against such liability under the provisions of Section 145 of the
Delaware General Corporation Law.

     Article VII, Section 1 of the Bylaws of the Company provides that the
Company shall indemnify its directors and executive officers to the fullest
extent not prohibited by the Delaware General Corporation Law.  The rights to
indemnity thereunder continue as to a person who has ceased to be a director,
officer, employee or agent and inure to the benefit of the heirs, executors and
administrators of the person.  In addition, expenses incurred by a director or
executive officer in defending any civil, criminal, administrative or
investigative action, suit or proceeding by reason of the fact that he or she is
or was a director or officer of the Company (or was serving at the Company's
request as a director or officer of another corporation) shall be paid by the
Company in advance of the final disposition of such action, suit or proceeding
upon receipt of an undertaking by or on behalf of such director or officer to
repay such amount if it shall ultimately be determined that he or she is not
entitled to be indemnified by the Company as authorized by the relevant section
of the Delaware General Corporation Law.

     As permitted by Section 102(b)(7) of the Delaware General Corporation Law,
Article V, Section (A) of the Company's Certificate of Incorporation provides
that a director of the Company shall not be personally liable for monetary
damages for breach of fiduciary duty as a director, except for liability (i) for
any breach of the director's duty of loyalty to the Company or its stockholders,
(ii) for acts or omissions not in good faith or acts or omissions that involve
intentional misconduct or a knowing violation of law, (iii) under Section 174 of
the Delaware General Corporation Law or (iv) for any transaction from which the
director derived any improper personal benefit.


                                         II-1


     The Company has entered into indemnification agreements with each of its
directors and executive officers.  Generally, the indemnification agreements
attempt to provide the maximum protection permitted by Delaware law as it may be
amended from time to time.  Moreover, the indemnification agreements provide for
certain additional indemnification.  Under such additional indemnification
provisions, however, an individual will not receive indemnification for
judgments, settlements or expenses if he or she is found liable to the Company
(except to the extent the court determines he or she is fairly and reasonably
entitled to indemnity for expenses), for settlements not approved by the Company
or for settlements and expenses if the settlement is not approved by the court. 
The indemnification agreements provide for the Company to advance to the
individual any and all reasonable expenses (including legal fees and expenses)
incurred in investigating or defending any such action, suit or proceeding.  In
order to receive an advance of expenses, the individual must submit to the
Company copies of invoices presented to him or her for such expenses.  Also, the
individual must repay such advances upon a final judicial decision that he or
she is not entitled to indemnification.

     The Company has purchased directors' and officers' liability insurance.  

Item 7.  EXEMPTION FROM REGISTRATION CLAIMED

          Not Applicable.

Item 8.  EXHIBITS




        Exhibit
        Number     Exhibit
        --------   -------
                
          4.1      Certificate of Incorporation*
          4.2      Bylaws*
          5        Opinion and Consent of Company Counsel
         23.1      Consent of Company Counsel is contained in Exhibit 5
         23.2      Consent of Independent Accountants, Coopers & Lybrand
         24        Power of Attorney.  Reference is made to page II-4 of this
                   Registration Statement.
         99.1      Second Amendment to 1994 Stock Option/Stock Issuance Plan
         99.2      1998 Employee Stock Purchase Plan
         99.3      Form of Stock Purchase Agreement
         99.4      1998 Employee Stock Purchase Plan for ADA Canada
         99.5      Form of Stock Purchase Agreement



     *    Filed as an Exhibit to the Company's Report on Form 8-K filed on
          December 23, 1997 (File No. 000-23698) and incorporated herein by
          reference.

Item 9.  UNDERTAKINGS

     1.   The undersigned registrant hereby undertakes:  

          (a)       To file, during any period in which offers or sales are
being made, a post-effective amendment to this registration statement:

          (i)       To include any prospectus required by Section 10(a)(3) of
     the Securities Act of 1933, as amended (the "1933 Act");

          (ii)      To reflect in the prospectus any facts or events arising
     after the effective date of this registration statement (or the most recent
     post-effective amendment thereof) which, individually or in the aggregate,
     represent a fundamental change in the information set forth in this
     registration statement; and 

          (iii)     To include any material information with respect to the plan
     of distribution not previously disclosed in this registration statement or
     any material change to such information in this registration statement;

PROVIDED, HOWEVER, that paragraphs (a)(i) and (a)(ii) shall not apply if the
information required to be in a post-effective amendment by those paragraphs is
contained in periodic reports filed by the Company pursuant to Section 13 or


                                         II-2


Section 15(d) of the 1934 Act that are incorporated by reference into this
registration statement.  

          (b)  That, for the purpose of determining any liability under the 1933
Act, each such post-effective amendment shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial BONA FIDE offering
thereof; and 

          (c)  To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold upon the
termination of the offering.

     2.   The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the 1933 Act, each filing of the Company's
annual report pursuant to Section 13(a) or Section 15(d) of the 1934 Act (and,
where applicable, each filing of an employee benefit plan's annual report
pursuant to Section 15(d) of the 1934 Act) that is incorporated by reference in
this registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     3.   Insofar as indemnification for liabilities arising under the 1933 Act
may be permitted to directors, officers or controlling persons of the Company
pursuant to the foregoing provisions, or otherwise, the Company has been advised
that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the 1933 Act and is,
therefore, unenforceable.  In the event that a claim for indemnification against
such liabilities (other than the payment by the Company of expenses incurred or
paid by a director, officer or controlling person of the Company in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Company will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the 1933 Act and will be governed by the final
adjudication of such issue.


                                         II-3


                                      SIGNATURE

          Pursuant to the requirements of the Securities Act of 1933, the
registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-8, and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of San Diego, State of California, on this 28th day
of May, 1998.

                                             APPLIED DIGITAL ACCESS, INC.

                                             By     /s/ Peter P. Savage
                                                --------------------------------
                                                Peter P. Savage
                                                President and Chief Executive
                                                Officer


                                  POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENTS:

          That the undersigned officers and directors of Applied Digital Access,
Inc., a Delaware corporation, do hereby constitute and appoint Peter P. Savage
and James L. Keefe, and each of them, the lawful attorneys-in-fact and agents
with full power and authority to do any and all acts and things and to execute
any and all instruments which said attorneys and agents, and either one of them,
determine may be necessary or advisable or required to enable said corporation
to comply with the Securities Act of 1933, as amended, and any rules or
regulations or requirements of the Securities and Exchange Commission in
connection with this Registration Statement.  Without limiting the generality of
the foregoing power and authority, the powers granted include the power and
authority to sign the names of the undersigned officers and directors in the
capacities indicated below to this Registration Statement, to any and all
amendments, both pre-effective and post-effective, and supplements to this
Registration Statement, and to any and all instruments or documents filed as
part of or in conjunction with this Registration Statement or amendments or
supplements thereof, and each of the undersigned hereby ratifies and confirms
that all said attorneys and agents, or either of them, shall do or cause to be
done by virtue hereof.  This Power of Attorney may be signed in several
counterparts.

          IN WITNESS WHEREOF, each of the undersigned has executed this Power of
Attorney as of the date indicated.

          Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below by the following persons in the
capacities indicated on May 28, 1998.


 


          Signature                                 Title
          ---------                                 -----



          /s/ Peter P. Savage                President and Chief
          ---------------------------       Executive Officer and
          Peter P. Savage                    Director (Principal
                                               Executive Officer)


          /s/ James L. Keefe             Vice President, Finance and
          ---------------------------       Administration, Chief
          James L. Keefe                 Financial Officer (Principal
                                            Financial and Accounting
                                                    Officer)


          /s/ Christopher B. Paisley               Director
          ---------------------------
          Christopher B. Paisley


          /s/ Edward F. Tuck                       Director
          ---------------------------
          Edward F. Tuck


          /s/ Kenneth E. Olson                     Director
          ---------------------------
          Kenneth E. Olson




                                      II-4




                                 EXHIBIT INDEX




     Exhibit
     Number        Exhibit
     --------      -------
                
        4.1        Certificate of Incorporation*
        4.2        Bylaws*
        5          Opinion and Consent of Company Counsel
       23.1        Consent of Company Counsel is contained in
                   Exhibit 5.
       23.2        Consent of Independent Accountants, Coopers &
                   Lybrand
       24          Power of Attorney.  Reference is made to page II-4
                   of this Registration Statement.
       99.1        Second Amendment to 1994 Stock Option/Stock Issuance
                   Plan
       99.2        1998 Employee Stock Purchase Plan
       99.3        Form of Stock Purchase Agreement
       99.4        1998 Employee Stock Purchase Plan for ADA Canada
       99.5        Form of Stock Purchase Agreement



       *           Filed as an Exhibit to the Company's Report on Form 8-K
                   filed on December 23, 1997 (File No. 000-23698) and 
                   incorporated herein by reference.