INTERVOICE INC
S-8, 1998-11-30
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>   1
       As Filed with the Securities and Exchange Commission on November 30, 1998
                                           Registration Statement No. 333-______
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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

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

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

                                INTERVOICE, INC.
             (Exact name of registrant as specified in its charter)

              TEXAS                                       75-1927578
  (State or other jurisdiction              (I.R.S. Employer Identification No.)
of incorporation or organization)

        17811 WATERVIEW PARKWAY                              75252
           DALLAS, TEXAS                                   (Zip Code)
(Address of Principal Executive Offices)

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

                  INTERVOICE, INC. EMPLOYEE STOCK PURCHASE PLAN
                            (Full title of the Plan)

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

             ROB-ROY J. GRAHAM                                Copy to:
          CHIEF FINANCIAL OFFICER                         DAVID E. MORRISON
                AND SECRETARY                             THOMPSON & KNIGHT
              INTERVOICE, INC.                       A PROFESSIONAL CORPORATION
         17811 WATERVIEW PARKWAY                         1700 PACIFIC AVENUE
           DALLAS, TEXAS 75252                                SUITE 3300
(Name and address of agent for service)                   DALLAS, TEXAS 75201
                                                             (214) 969-1700

                                 (972) 454-8712
                          (Telephone number, including
                        area code, of agent for service)

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
==================================================================================================================

        Title of                                      Proposed           Proposed Maximum            Amount
       Securities                Amount                Maximum               Aggregate                 of
         to be                   to be             Offering Price            Offering             Registration
     Registered(1)            Registered(2)          per Unit(3)             Price(3)                 Fee
- -------------------------------------------------------------------------------------------------------------------
<S>                          <C>                   <C>                   <C>                      <C>
     Common Stock,
      no par value           300,000 shares           $ 25.125            $ 7,537,500.00           $ 2,095.43
       per share
==================================================================================================================
</TABLE>

(1)  This registration statement also covers an equal number of Preferred Share
     Purchase Rights issuable pursuant to InterVoice, Inc.'s Rights Agreement,
     which rights will be transferable only with related shares of Common Stock.

(2)  Pursuant to Rule 416, shares issuable upon any stock split, stock dividend
     or similar transaction with respect to these shares are also being
     registered hereunder.

(3)  Estimated solely for the purposes of determining the registration fee
     pursuant to Rule 457(h) on the basis of the average of the high and low
     prices for the Common Stock ($25.125) as reported on the Nasdaq National
     Market on November 25, 1998.
================================================================================


<PAGE>   2






Documents Incorporated by Reference.

         The contents of the Registration Statement (the "Prior Registration
Statement") of InterVoice, Inc. (the "Registrant") on Form S-8, Registration No.
33-72494, filed with the Securities and Exchange Commission on December 1, 1993,
including the documents incorporated by reference therein, are incorporated by
reference into this Registration Statement.

Amendments to the Plan.

         On May 22, 1998, the Board of Directors of the Registrant adopted
amendments to the Registrant's Employee Stock Purchase Plan (the "Plan") that
increased from 200,000 to 500,000 the aggregate number of shares of the
Registrant's common stock, no par value per share ("Common Stock"), reserved for
issuance under the Plan. The amendment was approved by the shareholders of the
Registrant on July 23, 1998.

Exhibits.

         In addition to the exhibits filed or incorporated by reference into the
Prior Registration Statement, the following documents are filed as exhibits to
this Registration Statement.

         4.1      InterVoice, Inc. Employee Stock Purchase Plan, as amended.

         5.1      Opinion of Thompson & Knight, a Professional Corporation,
                  regarding 300,000 shares of Common Stock.

        24.1      Consent of Ernst & Young, L.L.P., independent public
                  accountants, to incorporation of report by reference.

        24.2      Consent of counsel (included in the opinion of Thompson &
                  Knight, a Professional Corporation, filed herewith as Exhibit
                  5.1).







<PAGE>   3





                                   SIGNATURES

     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 Dallas and State of Texas on the
     30th day of November, 1998.

                                        INTERVOICE, INC.
                                        (Registrant)


                                        By:   /s/ Daniel D. Hammond
                                           -------------------------------------
                                              Daniel D. Hammond,
                                              Chairman of the Board of Directors
                                              and Chief Executive Officer

     Pursuant to the requirements of the Securities Act of 1933, this
     Registration Statement has been signed by the following persons in the
     capacities and on the date indicated. The undersigned persons hereby
     constitute and appoint Daniel D. Hammond and Rob-Roy J. Graham, or either
     of them, as our true and lawful attorneys-in-fact with full power to
     execute in our name and on our behalf in the capacities indicated below any
     and all amendments to this Registration Statement to be filed with the
     Securities and Exchange Commission and hereby ratify and confirm all that
     such attorneys-in-fact shall lawfully do or cause to be done by virtue
     hereof.


<TABLE>
<CAPTION>

Signature                                   Title                                            Date
- ---------                                   -----                                            ----
<S>                                         <C>                                              <C>
/s/ Daniel D. Hammond                       Chairman of the Board of Directors               November 30, 1998
- ----------------------------------          and Chief Executive Officer
Daniel D. Hammond                           


/s/ Rob-Roy J. Graham                       Chief Financial Officer and Secretary            November 30, 1998
- ----------------------------------          (Principal Financial Officer and
Rob-Roy J. Graham                           Principal Accounting Officer)
                          


/s/ Joseph J. Pietropaolo                   Director                                         November 30, 1998
- ----------------------------------
Joseph J. Pietropaolo


/s/ George C. Platt                         Director                                         November 30, 1998
- ----------------------------------
George C. Platt


/s/ Grant A. Dove                           Director                                         November 30, 1998
- ----------------------------------
Grant A. Dove


/s/ David W. Brandenburg                    Director                                         November 30, 1998
- ----------------------------------
David W. Brandenburg
</TABLE>



<PAGE>   4





                                INDEX TO EXHIBITS

<TABLE>
<CAPTION>


                                                                                     Sequentially
                                                                                       Numbered
Exhibit Number                        Exhibit                                            Page
- --------------                        -------                                        -------------
<S>               <C>                                                                <C>
     4.1          InterVoice, Inc. Employee Stock Purchase Plan, as amended.                 5

     5.1          Opinion of Thompson & Knight, a Professional Corporation,
                  regarding 300,000 shares of Common Stock.                                 10

    24.1          Consent of Ernst & Young, independent public accountants, to
                  incorporation of report by reference.                                     11

    24.2          Consent of counsel (included in the opinion of Thompson &
                  Knight, a Professional Corporation, filed herewith as Exhibit
                  5.1).                                                                     10 
</TABLE>

<PAGE>   1
                                                                     EXHIBIT 4.1

                                INTERVOICE, INC.

                          EMPLOYEE STOCK PURCHASE PLAN



         Section 1. Purpose. It is the purpose of the Plan to promote the
interests of the Company and its shareholders by providing a method by which
eligible employees may use voluntary payroll deductions to purchase shares of
Common Stock at a discount, thereby affording them the opportunity to invest in
the Company at a preferential price, and to acquire a proprietary interest in
the Company and an increased personal interest in its continued success and
progress. The Plan is intended to qualify as an employee stock purchase plan
within the meaning of Section 423 of the Code and shall be construed
accordingly.

         Section 2. Definitions. As used herein the following terms have the
following meanings:

         (a)   "Affiliate" means any corporation that is a subsidiary 
corporation of the Company within the meaning of Section 424(f) of the Code and
that has been designated by the Committee as an Affiliate for purposes of the
Plan.

         (b)   "Board of Directors" means the Board of Directors of the Company.

         (c)   "Code" means the United States Internal Revenue Code of 1986,as 
from time to time amended.

         (d)   "Committee" means the Committee described in Section 4 hereof.

         (e)   "Common Stock" means the Common Stock, no par value, of the
Company.

         (f)   "Company" means InterVoice, Inc.

         (g)   "Compensation" for an option period means the total compensation 
of an employee for services rendered to the Company or any Affiliate. The
Compensation of an employee who does not receive salary or wages computed in
United States dollars shall be determined by converting such salary or wages
into United States dollars in accordance with the Compensation Exchange Rate.

         (h)   "Compensation Exchange Rate" means the New York foreign currency
exchange rate as reported in The Wall Street Journal for the first business day
immediately preceding the first business day of the applicable option period.

         (i)   "Eligible Employee" means any employee of the Company or an
Affiliate who is eligible to participate in the Plan pursuant to Section 5
hereof.

         (j)   "Fair Market Value" means the closing sale price on the date in
question (or, if there was no reported sale on such date, on the last preceding
day on which any reported sale occurred) of the Common Stock on the NASDAQ
National Market System or such other national stock exchange or stock market on
which the Common Stock may from time to time be traded.

         (k)   "Option" means any option to purchase shares of Common Stock
granted by the Committee pursuant to the provisions of the Plan.

                                        1

 



<PAGE>   2



                           (l) "Participant" means an Eligible Employee who
                  elects to participate in the Plan pursuant to Section 6
                  hereof.

                           (m) "Plan" means this InterVoice, Inc. Employee Stock
                  Purchase Plan.

                           Section 3. Number of Shares. The aggregate number of
                  shares of Common Stock issued pursuant to Options granted
                  under the Plan shall not exceed a total of 500,000 shares. The
                  maximum number of shares of Common Stock available for sale
                  under the Plan is subject to adjustment as provided in Section
                  14. The Common Stock to be delivered upon exercise of Options
                  may consist of authorized but unissued shares of Common Stock
                  or shares of Common Stock previously issued and reacquired by
                  the Company.

                           Section 4. Administration of the Plan. The Plan
                  shall be administered by the Committee, which shall consist of
                  three or more directors or executive officers of the Company.
                  Each member of the Committee shall be appointed by and shall
                  serve at the pleasure of the Board of Directors. The Board of
                  Directors shall have the sole continuing authority to appoint
                  members of the Committee both in substitution for members
                  previously appointed and to fill vacancies however caused. The
                  following provisions shall apply to the administration of the
                  Plan by the Committee:

                           (a) The Committee shall designate one of its members
                  as Chairman and shall hold meetings at such times and places
                  as it may determine. Each member of the Committee shall be
                  notified in writing of the time and place of any meeting of
                  the Committee at least two days prior to such meeting,
                  provided that such notice may be waived by a Committee member.
                  A majority of the members of the Committee shall constitute a
                  quorum and any action taken by a majority of the members of
                  the Committee present at any duly called meeting at which a
                  quorum is present (or action unanimously approved in writing)
                  shall constitute action by the Committee.

                           (b) The Committee may appoint a Secretary (who need
                  not be a member of the Committee) who shall keep minutes of
                  its meetings. The Committee may make such rules and
                  regulations for the conduct of its business as it may
                  determine.

                           (c) The Committee shall have full authority, subject
                  to the express provisions of the Plan to interpret the Plan,
                  to provide, modify and rescind rules and regulations relating
                  to it and to make all other determinations and perform such
                  actions as the Committee deems necessary or advisable to
                  administer the Plan.

                           (d) No member of the Committee shall be liable for
                  any action taken or determination made in good faith with
                  respect to the Plan or any Option granted hereunder.

                           Section 5. Eligible Employees. Each employee of the
                  Company or an Affiliate who is employed by the Company or an
                  Affiliate on the date his participation in the Plan is to
                  become effective shall be eligible to participate in the Plan;
                  provided, however, that:

                           (a) An employee shall not be granted an Option if
                  such employee would, immediately after grant of the Option,
                  own stock possessing 5% or more of the total combined voting
                  power or value of all classes of stock of the Company or any
                  parent or subsidiary corporation of the Company (within the
                  meaning of Section 424(e) and (f) of the Code). For purposes
                  of determining stock ownership under this paragraph, the rules
                  of Section 424(d) of the Code shall apply, and stock which the
                  employee may purchase under any outstanding options shall be
                  treated as stock owned by the employee; and

                           (b) No employee shall be granted an Option under the
                  Plan which would permit such employee's rights to purchase
                  shares of stock under all employee stock purchase plans of the
                  Company and its parent and subsidiary corporations (within the
                  meaning of Section 424(e) and (f) of the Code) to accrue
                  (within the meaning of Section 423(b)(8) of the Code) at a
                  rate which exceeds U.S. $25,000 of fair market value of such 
                  stock

                                        2





<PAGE>   3







         (determined at the time such option is granted) for each calendar year
         during which any such option granted to such employee is outstanding at
         any time.

                  For purposes of this Section 5, the term "employee" shall not
         include an employee whose customary employment is 20 hours or less per
         week or is for not more than five months in any calendar year.

                  Section 6. Method of Participation. Each person who will be an
         Eligible Employee on any December 1 or June 1 may elect to participate
         in the Plan by executing and delivering, on or before the immediately
         preceding November 30 or May 31, respectively, a payroll deduction
         authorization as provided in this Section; provided, however, that an
         Eligible Employee who elects not to participate on a given December 1
         or June 1 shall not be eligible to participate in the Plan until the
         following December 1 or June 1, respectively. Such Eligible Employee
         shall thereby become a Participant on such December 1 or June 1 and
         shall remain a Participant until such Eligible Employee's participation
         is terminated as provided in Section 10 or 11 hereof.

                  The payroll deduction authorization executed by a Participant
         shall request withholding, by means of substantially equal payroll
         deductions over the period during which he or she is a Participant, of
         an amount which shall be no more than 10% nor less than 1% of such
         Participant's Compensation for a given option period. A Participant may
         change the withholding rate of his or her payroll deduction
         authorization within such limits by delivering a new payroll deduction
         authorization form to the Company on or before the November 30 or May
         31, as the case may be, immediately preceding the option period with
         respect to which the change is to be effective. A Participant may not
         change the withholding rate of his or her payroll deduction
         authorization with respect to an option period at any time after the
         deadline set forth in the immediately preceding sentence. All amounts
         withheld in accordance with a Participant's payroll deduction
         authorization shall be credited to a withholding account for such
         Participant. No interest shall be payable on withholding accounts.

                  Section 7. Grant of Options. The Plan will be implemented in
         twelve-month option periods beginning on the first day of December and
         the first day of June and ending on the following November 30 and May
         31, respectively, until the Plan is terminated. Each Participant shall
         be granted an Option on the first day of each option period to purchase
         the number of whole shares of Common Stock determined by dividing (x)
         the aggregate payroll deduction authorized by such Participant for the
         option period by (y) 85% of the Fair Market Value per share of Common
         Stock on the first day of the option period. Each Option shall be
         exercisable as provided in Section 9 on the last business day of an
         option period. In no event shall the number of shares with respect to
         which an Option is granted to a Participant for a calendar year exceed
         that number of shares which has an aggregate Fair Market Value
         (determined on the date of grant) of U.S.$25,000, and the number of
         shares actually purchased by a Participant in a calendar year may not
         exceed this number. The Company shall reduce, on a substantially
         proportionate basis, the number of shares of Common Stock receivable by
         each Participant upon exercise of an Option in the event that the total
         number of shares then available under the Plan is less than the total
         number of shares with respect to which all Participants exercise
         Options in such option period.

                  Section 8. Option Price. The purchase price per share of 
         Common Stock under each Option shall equal the lesser of (a) 85% of the
         Fair Market Value per share of Common Stock on the date of grant of the
         Option or (b) 85% of the Fair Market Value per share of Common Stock on
         the date on which the Option is exercised. If the Common Stock of the
         Company is not admitted to trading on any of the aforesaid dates for
         which closing prices of the stock are to be determined, then reference
         shall be made to the Fair Market Value of the stock on that date, as
         determined on such basis as shall be established or specified for the
         purpose by the Committee.

                  Section 9. Exercise of Options. An employee who is a
         Participant in the Plan on the last business day of an option period
         shall be deemed automatically to have exercised the current installment
         of the Option granted to him or her for that option period. Upon such
         exercise, the Company shall apply the entire balance of the
         Participant's withholding account to the purchase of the maximum number
         of whole shares of Common Stock as determined under Section 7. For
         purposes of this Section 9, the balance in the withholding account of a
         Participant whose salary or wages are not computed in United States
         dollars shall be converted into United

                                        3





<PAGE>   4
         States dollars in accordance with the New York foreign currency
         exchange rate as reported in The Wall Street Journal for the last
         business day of the option period. Certificates representing shares of
         Common Stock purchased for a Participant under the Plan shall be issued
         and delivered to the Participant as soon as practicable after such
         shares are purchased; provided, however, that the obligation of the
         Company to deliver shares of Common Stock shall be postponed for such
         period of time as may be necessary to register or qualify the purchased
         shares under the Securities Act of 1933 and any applicable foreign or
         state securities law.

                  A Participant shall possess none of the rights or privileges
         of a shareholder of the Company with respect to Common Stock purchased
         under the Plan unless and until certificates representing such shares
         have been issued. No fractional shares shall be issued upon exercise of
         any installment of an Option. Any balance remaining in a Participant's
         withholding account following exercise of an installment shall be
         returned to the Participant. The cash proceeds received by the Company
         upon exercise of an Option shall constitute general funds of the
         Company. Any unexercised portion of an Option shall expire and become
         null and void as of the end of the option period in which such Option
         was granted.

                  Section 10. Cancellation of Option and Withdrawal From the
         Plan. A Participant who holds an Option under the Plan may at any time
         prior to exercise thereof pursuant to Section 9 cancel the remaining
         unexercised portion of such Option by written notice delivered to the
         Treasurer of the Company. Upon such cancellation, the balance in the
         Participant's withholding account shall be returned to such Participant
         and he or she shall cease to be a Participant. Partial cancellations
         shall not be permitted.

                  A Participant may terminate his payroll deduction
         authorization as of any date by written notice delivered to the
         Treasurer of the Company and shall thereby cease to be a Participant as
         of such date. Partial termination of a payroll deduction authorization
         shall not be permitted, except to the extent expressly permitted by
         Section 6 of this Plan. Any Participant who voluntarily terminates his
         or her payroll deduction authorization prior to the last business day
         of an option period shall be deemed to have cancelled his or her option
         for such option period.

                  A Participant who withdraws from the Plan pursuant to this
         Section 10 may re-enroll as of any subsequent December 1 or June 1 on
         which he or she is an Eligible Employee in accordance with the
         procedure set forth in Section 6 of this Plan; provided, however, that
         a Participant shall not be permitted to reenroll in the Plan until a
         December 1 or June 1 that is at least one month after the date of his
         or her withdrawal.

                  Section 11. Termination of Employment. Upon the termination of
         a Participant's employment with the Company or an Affiliate for any
         reason, such person shall cease to be a Participant, the Option held by
         such Participant under the Plan shall be deemed cancelled, the balance
         of such Participant's withholding account shall be returned to such
         Participant (or, in the event of the Participant's death, to the
         executor or administrator of his or her estate) and he or she shall
         have no further rights under the Plan.

                  All Participants shall have the same rights and privileges
         under the Plan. Notwithstanding the foregoing, nothing in the Plan
         shall confer upon any Participant any right to continue in the employ
         of the Company or an Affiliate or in any way interfere with the right
         of the Company or an Affiliate to terminate the employment of the
         Participant at any time, with or without cause. Transfers of employment
         among the Company and its Affiliates and approved leaves of absence not
         exceeding 90 days shall not be considered terminations of employment
         for purposes of this Plan.

                  Section 12. Transferability. An Option granted under the Plan
         shall not be transferable by the Participant and shall be exercisable
         only by the Participant.

                  Section 13. Adjustments Upon Changes in Common Stock. In the
         event the Company shall effect a split of the Common Stock or declare a
         dividend payable in Common Stock, or in the event the outstanding
         Common Stock shall be combined into a smaller number of shares, the
         maximum number of shares as to which

                                        4


<PAGE>   5






         Options may be granted under the Plan shall be increased or decreased
         proportionately, and the Fair Market Value per share of Common Stock as
         of the date of grant of all outstanding Options shall be adjusted, for
         purposes of making the determination required by Section 8 of this
         Plan, in a manner deemed appropriate by the Board of Directors.

                  In the event of a reclassification of Common Stock not covered
         by the foregoing, or in the event of a liquidation or reorganization of
         the Company, including a merger, consolidation or sale of assets, the
         Board of Directors shall make such adjustments, if any, as it may deem
         appropriate in the number, purchase price and kind of shares that are
         covered by Options theretofore granted under the Plan or that are
         otherwise subject to the Plan. The provisions of this Section shall
         only be applicable if, and only to the extent that, the application
         thereof does not conflict with any valid governmental statute,
         regulation or rule.

                  Section 14. Amendment and Termination of the Plan. Subject to
         the right of the Board of Directors to terminate the Plan prior
         thereto, the Plan shall terminate when all or substantially all of the
         Common Stock reserved for purposes of the Plan has been purchased. No
         Options may be granted after termination of the Plan. The Board of
         Directors may alter or amend the Plan but may not without the approval
         of the shareholders of the Company and of any regulatory authorities
         having jurisdiction make any alteration or amendment thereof which
         operates (a) to increase the total number of shares of Common Stock
         which may be issued under the Plan (other than as provided in Section
         13), (b) to modify the criteria for determining the employees (or class
         of employees) eligible to receive Options under the Plan or (c) to
         materially increase benefits accruing under the Plan to Participants
         who are subject to Section 16 of the Securities Exchange Act of 1934
         (the "Exchange Act").

                  No termination or amendment of the Plan shall adversely affect
         the rights of a Participant under an outstanding Option, except with
         the consent of such Participant.

                  Section 15. Requirements of Law. The granting of Options and
         the issuance of Common Stock upon the exercise of an Option shall be
         subject to all applicable laws, rules and regulations and to such
         approval by governmental agencies as may be required.

                  Section 16. Effective Date of the Plan. The Plan shall become
         effective, as of the date of its adoption by the Board of Directors, if
         it is duly approved at the 1994 annual meeting of shareholders of the
         Company. The affirmative vote of the holders of at least a majority of
         the shares of stock of the Company present and voting on the approval
         of the Plan at the meeting, provided that the total number of shares
         voting for the proposal represents more than 50% of the total number of
         shares of stock present in person or represented by proxy and entitled
         to vote at such annual meeting, shall be required to approve the Plan.
         If the Plan is not so approved, the Plan shall terminate, the
         unexercised portions of all Options granted hereunder shall be null and
         void and all shares of Common Stock theretofore issued upon the
         exercise of Options under the Plan shall be deemed cancelled.
         Certificates representing shares issued to Participants prior to
         shareholder approval of the Plan shall bear appropriate legends
         indicating that the shares have been issued contingent upon shareholder
         approval and are cancelable in the event such approval is not obtained.
         Upon such cancellation, Participants shall promptly deliver to the
         Company all certificates representing cancelled shares and the Company
         shall promptly return to the Participants, without interest, all funds
         obtained from such Participants through payroll deductions and used for
         the purchase of such shares.

                  Section 17. Rule 16b-3 Compliance. Transactions under this
         Plan are intended to comply with all applicable conditions of Rule
         16b-3 or its successors adopted under the Exchange Act, some of which
         conditions are not set forth herein. To the extent any provision of the
         Plan or action by the Committee fails to so comply, it shall be deemed
         null and void, to the extent permitted by law and deemed advisable by
         the Committee.

                                        5






<PAGE>   1
                                                                     EXHIBIT 5.1


(214) 969-1368

                                November 30, 1998


INTERVOICE, INC.
17811 Waterview Parkway
Dallas, TX  75252

Attention:  Mr. Dean C. Howell, Vice President and Corporate Counsel

Gentlemen:

         Thompson & Knight, P.C. has acted as counsel to InterVoice, Inc.
("InterVoice") in connection with its Registration Statement on Form S-8 (the
"Registration Statement") to be filed with the Securities and Exchange
Commission relating to 300,000 shares of common stock, no par value per share,
of the Company (the "Shares"), subject to the InterVoice, Inc. Employee Stock
Purchase Plan (the "Plan"). In connection with the foregoing, we have examined,
among other things, the Registration Statement and such other documents and
instruments as we have deemed necessary as a basis for this opinion. In such
examination, we have assumed the genuineness of all signatures, the authenticity
of all documents submitted to us as originals and the conformity with the
original documents of documents submitted to us as copies. As to certain facts
material to this opinion, we have relied, to the extent we considered
appropriate, on certificates of officers of the Company.

         Based upon the foregoing, and subject to the qualifications set forth
herein, it is our opinion that the Shares, when issued pursuant to the
provisions of the Plan, will be validly issued, fully paid and non-assessable.

         We hereby consent to the filing of a copy of this opinion as an exhibit
to the Registration Statement.

                                         Respectfully submitted,

                                         THOMPSON & KNIGHT, P.C.


                                         By: /s/ DAVID E. MORRISON
                                            ------------------------------------
                                               David E. Morrison, Attorney

<PAGE>   1
                                                                   EXHIBIT 24.1



                        Consent of Independent Auditors


We consent to the incorporation by reference in the Registration Statement 
(Form S-8) pertaining to the InterVoice, Inc. Employee Stock Purchase Plan of 
our report dated April 7, 1998, with respect to the consolidated financial 
statements and schedule of InterVoice, Inc. included in its Annual Report (Form 
10-K) for the year ended February 28, 1998, filed with the Securities and 
Exchange Commission.

                                             ERNST & YOUNG LLP

November 30, 1998
Dallas, Texas




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