Document:

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                                                                     Exhibit 4.3

                               DAVOX CORPORATION

                       1991 EMPLOYEE STOCK PURCHASE PLAN

Article 1 - Purpose.
-------------------

     This 1991 Employee Stock Purchase Plan (the "Plan") is intended as an
incentive to, and to encourage stock ownership by, all eligible employees of
Davox Corporation (the "Company") and participating subsidiaries so that they
may share in the growth of the Company by acquiring or increasing their
proprietary interest in the Company. The Plan is designed to encourage eligible
employees to remain in the employ of the Company. It is intended that options
issued pursuant to this Plan will constitute options issued pursuant to an
"employee stock purchase plan" within the meaning of Section 423(b) of the
Internal Revenue Code of 1986, as amended (the "Code").

Article 2 - Administration of the Plan.
--------------------------------------

     The Plan may be administered by a committee appointed by the Board of
Directors of the Company (the "Committee"). The Committee shall consist of not
less than two members of the Company's Board of Directors. The Board of
Directors may from time to time remove members from, or add members to, the
Committee. Vacancies on the Committee, howsoever caused, shall be filled by the
Board of Directors. The Committee may select one of its members as Chairman, and
shall hold meetings at such times and places as it may determine. Acts by a
majority of the Committee, or acts reduced to or approved in writing by a
majority of the members of the Committee, shall be the valid acts of the
Committee.

     The interpretation and construction by the Committee of any provisions of
the Plan or of any option granted under it shall be final, unless otherwise
determined by the Board of Directors. The Committee may from time to time adopt
such rules and regulations for carrying out the Plan as it may deem best,
provided that any such rules and regulations shall be applied on a uniform basis
to all employees under the Plan. No member of the Board of Directors or the
Committee shall be liable for any action or determination made in good faith
with respect to the Plan or any option granted under it.

     In the event the Board of Directors fails to appoint or refrains from
appointing a Committee, the Board of Directors shall have all power and
authority to administer the Plan. In such event, the word "Committee" wherever
used herein shall be deemed to mean the Board of Directors.

Article 3 - Eligible Employees.
------------------------------

     All employees of the Company or any of its participating subsidiaries who
have completed six months of employment with the Company or any of its
subsidiaries shall be eligible to receive options under this Plan to purchase
the Company's Common Stock, and all eligible employees shall have the same
rights and privileges hereunder. Persons who have been so employed for six
months or more on the first day of any Payment Period shall receive their
options as of such day. Persons who attain the status of employment for six
months or more after any date on which options are granted under this Plan shall
be granted options on the next date of the next succeeding Payment Period on
which options are granted to all eligible employees. Directors who are not also
employees of the Company shall not be eligible to receive options under this
Plan. In no event may an employee be granted an option if such employee,
immediately after the option is granted, owns stock possessing 5 percent or more
of the total combined
<PAGE>

voting power or value of all classes of stock of the Company or of its parent
corporation or subsidiary corporations, as the terms "parent corporation" and
"subsidiary corporation" are defined in 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 outstanding options shall be treated as stock owned by the
employee.

     For purposes of this Article 3, the term "employee" shall not include an
employee whose customary employment is 20 hours or less per week or whose
customary employment is for not more than 5 months in any calendar year.

Article 4 - Stock Subject to the Plan.
-------------------------------------

     The stock subject to the options under the Plan shall be shares of the
Company's authorized but unissued Common Stock, $.10 par value per share, or
shares of such Common Stock reacquired by the Company, including shares
purchased in the open market. The aggregate number of shares which may be issued
pursuant to the Plan is 100,000, subject to adjustment as provided in Article
12. In the event any option granted under the Plan shall expire or terminate for
any reason without having been exercised in full or shall cease for any reason
to be exercisable in whole or in part, the unpurchased shares subject thereto
shall again be available under the Plan.

Article 5 - Payment Periods and Stock Options.
---------------------------------------------

     The six-month periods, July 1 to December 31 and January 1 to June 30, are
Payment Periods during which payroll deductions will be accumulated under the
Plan. Each Payment Period includes only regular pay days falling within it. The
first Payment Period under the Plan may be a shortened Payment Period (i)
commencing on the later to occur of July 1, 1991 or the first day of the first
calendar month following effectiveness of the Form S-8 registration statement
filed with the Securities and Exchange Commission covering the shares to be
issued pursuant to the Plan and (ii) expiring on December 31, 1991.

     Twice each year, on the first business day of each Payment Period, the
Company will grant to each eligible employee who is then a participant in the
Plan an option to purchase on the last day of such Payment Period, at the Option
Price hereinafter provided for, a maximum of 250 shares, on condition that such
employee remains eligible to participate in the Plan throughout such Payment
Period. The participant shall be entitled to exercise such option so granted
only to the extent of the participant's accumulated payroll deductions on the
last day of such Payment Period. In the event that the participant's accumulated
payroll deductions on the last day of the Payment Period would enable the
participant to purchase more than 250 shares except for the 250-share
limitation, the excess of the amount of the accumulated payroll deductions over
the aggregate purchase price of the 250 shares shall be promptly refunded to the
participant by the Company, without interest. The Option Price for each Payment
Period shall be the lesser of (i) 85% of the average market price of the
Company's Common Stock on the first business day of the Payment Period or (ii)
85% of the average market price of the Company's Common Stock on the last
business day of the Payment Period, in either event rounded up to avoid
fractions of a dollar other than 1/4, 1/2 and 3/4. The foregoing limitation on
the number of shares which may be granted in any Payment Period and the Option
Price per share shall be subject to adjustment as provided in Article 12.

     For purposes of this Plan, the term "average market price" on any date
means (i) the average (on that date) of the high and low prices of the Company's
Common Stock on the principal national securities exchange on which the Common
Stock is traded, if the Common Stock is then traded on a national
<PAGE>

securities exchange; or (ii) the last reported sale price (on that date) of the
Common Stock on the NASDAQ National Market System, if the Common Stock is not
then traded on a national securities exchange; or (iii) the average of the
closing bid and asked prices last quoted (on that date) by an established
quotation service for over-the-counter securities, if the Common Stock is not
reported on the NASDAQ National Market System. If the Company's Common Stock is
not publicly traded at the time an option is granted under this Plan, "average
market price" shall mean the fair market value of the Common Stock as determined
by the Committee after taking into consideration all factors which it deems
appropriate, including, without limitation, recent sale and offer prices of the
Common Stock in private transactions negotiated at arm's length.

     For purposes of this Plan the term "business day" means a day on which
there is trading on the NASDAQ National Market System or on the aforementioned
national securities exchange, whichever is applicable pursuant to the preceding
paragraph.

     No employee shall be granted an option which permits the employee's right
to purchase Common Stock under the Plan and under all other Section 423(b)
employee stock purchase plans of the Company or any parent or subsidiary
corporations to accrue at a rate which exceeds $25,000 of fair market value of
such stock (determined at the time such option is granted) for each calendar
year in which such option is outstanding at any time. The purpose of the
limitation in the preceding sentence is to comply with Section 423(b)(8) of the
Code.

Article 6 - Exercise of Option.
------------------------------

     Each eligible employee who continues to be a participant in the Plan on the
last business day of a Payment Period shall be deemed to have exercised his or
her option on such date and shall be deemed to have purchased from the Company
such number of full shares of Common Stock reserved for the purpose of the Plan
as his or her accumulated payroll deductions on such date will pay for at the
Option Price, subject to the 250-share limit of the option. If a participant is
not an employee on the last business day of a Payment Period, he or she shall
not be entitled to exercise his or her option. Only full shares of Common Stock
may be purchased under the Plan. Unused payroll deductions remaining in an
employee's account at the end of a Payment Period (other than amounts refunded
to the employee pursuant to Article 5) will be carried forward to the succeeding
Payment Period.

Article 7 - Authorization for Entering the Plan.
-----------------------------------------------

     An employee may enter the Plan by filling out, signing and delivering to
the Company an authorization:

     A.  Stating the percentage to be deducted regularly from the employee's
   pay;

     B.  Authorizing the purchase of stock for the employee in each Payment
   Period in accordance with the terms of the Plan; and

     C.  Specifying the exact name in which stock purchased for the employee is
   to be issued as provided under Article 11 hereof.

     Such authorization must be received by the Company at least 10 days before
the beginning date of the next succeeding Payment Period.
<PAGE>

     Unless an employee files a new authorization or withdraws from the Plan,
the deductions and purchases under the authorization the employee has on file
under the Plan will continue from one Payment Period to succeeding Payment
Periods as long as the Plan remains in effect.

     The Company will accumulate and hold for the employee's account the amounts
from his or her pay. No interest will be paid on these amounts.

Article 8 - Maximum Amount of Payroll Deductions.
------------------------------------------------

     An employee may authorize payroll deductions in an amount not less than .5%
but not more than 10% of the employee's regular pay.

Article 9 - Change in Payroll Deductions.
----------------------------------------

     Deductions may not be increased or decreased during a Payment Period.
However, an employee may withdraw in full from the Plan.

Article 10 - Withdrawal from the Plan.
-------------------------------------

     An employee may withdraw from the Plan in whole but not in part, at any
time prior to the last business day of each Payment Period by delivering a
withdrawal notice to the Company, in which event the Company will promptly
refund the entire balance of the employee's deductions not theretofore used to
purchase stock under the Plan.

     To re-enter the Plan, an employee who has previously withdrawn must file a
new authorization at least 10 days before the beginning date of the next Payment
Period. The employee's re-entry into the Plan cannot, however, become effective
before the beginning of the next Payment Period following his or her withdrawal.
Employees who are subject to Section 16 of the Securities Exchange Act of 1934,
as amended, may not re-enter the Plan earlier than the Payment Period beginning
six months following the date of withdrawal from the Plan by such employee.

Article 11 - Issuance of Stock.
------------------------------

     Certificates for stock issued to participants will be delivered as soon as
practicable after each Payment Period.

     Stock purchased under the Plan will be issued only in the name of the
employee, or if his or her authorization so specifies, in the name of the
employee and another person of legal age as joint tenants with rights of
survivorship.

Article 12 - Adjustments.
------------------------

     Upon the happening of any of the following described events, an optionee's
rights under options granted hereunder shall be adjusted as hereinafter
provided:

     A.  In the event shares of Common Stock of the Company shall be subdivided
   or combined into a greater or smaller number of shares or if, upon a merger,
   consolidation, reorganization, split-up, liquidation, combination,
   recapitalization or the like of the Company, the shares of the Company's
   Common Stock shall be exchanged for other securities of the Company or of
   another corporation, each optionee shall be entitled, subject to the
   conditions herein stated, to purchase such
<PAGE>

   number of shares of Common Stock or amount of other securities of the Company
   or such other corporation as were exchangeable for the number of shares of
   Common Stock of the Company which such optionee would have been entitled to
   purchase except for such action, and appropriate adjustments shall be made in
   the purchase price per share to reflect such subdivision, combination, or
   exchange; and

     B.  In the event the Company shall issue any of its shares as a stock
   dividend upon or with respect to the shares of stock of the class which shall
   at the time be subject to option hereunder, each optionee upon exercising
   such an option shall be entitled to receive (for the purchase price paid upon
   such exercise) the shares as to which he or she is exercising his or her
   option and, in addition thereto (at no additional cost), such number of
   shares of the class or classes in which such stock dividend or dividends were
   declared or paid, and such amount of cash in lieu of fractional shares, as is
   equal to the number of shares thereof and the amount of cash in lieu of
   fractional shares, respectively, which he or she would have received if he or
   she had been the holder of the shares as to which he or she is exercising his
   or her option at all times between the date of the granting of such option
   and the date of its exercise.

     Upon the happening of any of the foregoing events, the class and aggregate
number of shares set forth in Article 4 hereof which are subject to options
which have been or may be granted under the Plan and the limitations set forth
in the second paragraph of Article 5 shall also be appropriately adjusted to
reflect the events specified in paragraphs A and B above. Notwithstanding the
foregoing, any adjustments made pursuant to subsections A or B shall be made
only to the extent that the Committee, based on advise of counsel for the
Company, determines that such adjustments will not constitute a change requiring
stockholder approval under Section 423(b)(2) of the Code.

     If the Company is to be consolidated with or acquired by another entity in
a merger, a sale of all or substantially all of the Company's assets or
otherwise (an "Acquisition"), the Committee shall, with respect to options then
outstanding under this Plan, either (i) make appropriate provision for the
continuation of such options by arranging for the substitution on an equitable
basis for the shares then subject to such options the consideration payable with
respect to the outstanding shares of the Company's Common Stock in connection
with the Acquisition; or (ii) terminate all outstanding options in exchange for
a cash payment equal to the excess of the fair market value of the shares
subject to the options (determined as of the date of the Acquisition) over the
Option Price thereof (determined with reference only to the first business day
of the applicable Payment Period).

     The Committee shall determine the adjustments to be made under this Article
12, and its determination shall be conclusive.

Article 13 - No Transfer or Assignment of Employee's Rights.
-----------------------------------------------------------

     An employee's rights under the Plan are the employee's alone and may not be
transferred or assigned to, or availed of by, any other person other than by
will or the laws of descent and distribution. Any option granted to an employee
may be exercised, during the employee's lifetime, only by the employee.

Article 14 - Termination of Employee's Rights,
---------------------------------------------

     An employee's rights under the Plan will terminate when he or she ceases to
be an employee because of retirement, resignation, lay-off, discharge, death,
change of status or for any other reason, except that if any employee is on a
leave of absence from work during the last three months of any
<PAGE>

Payment Period, he or she shall be deemed to be a participant in the Plan on the
last day of the Payment Period. A withdrawal notice will be considered as having
been received from the employee on the day his or her employment ceases, and all
payroll deductions not used to purchase stock will be refunded.

     If an employee's payroll deductions are interrupted by any legal process, a
withdrawal notice will be considered as having been received from the employee
on the day the interruption occurs.

Article 15 - Termination and Amendments to Plan.
-----------------------------------------------

     The Plan may be terminated at any time by the Company's Board of Directors
but such termination shall not affect options then outstanding under the Plan.
It will terminate in any case when all or substantially all of the unissued
shares of stock reserved for the purposes of the Plan have been purchased. If at
any time shares of stock reserved for the purpose of the Plan remain available
for purchase but not in sufficient number to satisfy all then unfilled purchase
requirements, the available shares shall be apportioned among participants in
proportion to their options and the Plan shall terminate. Upon such termination
or any other termination of the Plan, all payroll deductions not used to
purchase stock will be refunded.

     The Committee or the Board of Directors may from time to time adopt
amendments to the Plan provided that, without the approval of the shareholders
of the Company, no amendment may increase the number of shares that may be
issued under the Plan or change the class of employees eligible to receive
options under the Plan.

Article 16 - Limitations on Sale of Stock Purchased
---------------------------------------------------
Under the Plan.
--------------

     The Plan is intended to provide Common Stock for investment and not for
resale. The Company does not, however, intend to restrict or influence any
employee in the conduct of his or her own affairs. An employee may, therefore,
sell stock purchased under the Plan at any time the employee chooses, subject to
compliance with any applicable Federal or state securities laws; provided,
however, that because of certain Federal tax requirements, each employee agrees
by entering the Plan, promptly to give the Company notice of any such stock
disposed of within two years after the date of grant of the applicable option
showing the number of such shares disposed of. THE EMPLOYEE ASSUMES THE RISK OF
ANY MARKET FLUCTUATIONS IN THE PRICE OF THE STOCK.

Article 17 - Participating Subsidiaries.
---------------------------------------

     The term "participating subsidiaries" shall mean any subsidiary of the
Company, as that term is defined in Section 424(f) of the Code, which is
designated by the Board of Directors to participate in the Plan. The Board of
Directors shall have the power to make such designation before or after the Plan
is approved by the shareholders.

Article 18 - Optionees Not Shareholders.
---------------------------------------

     Neither the granting of an option to an employee nor the deductions from
his or her pay shall constitute such employee a shareholder of the shares
covered by an option until such shares have been purchased by and issued to the
employee.

Article 19 - Application of Funds.
---------------------------------
<PAGE>

     The proceeds received by the Company from the sale of Common Stock pursuant
to options granted under the Plan will be used for general corporate purposes.

Article 20 - Governmental Regulations.
-------------------------------------

     The Company's obligation to sell and deliver shares of the Company's Common
Stock under this Plan is subject to the approval of any governmental authority
required in connection with the authorization, issuance or sale of such shares,
including the Securities and Exchange Commission and the Internal Revenue
Service.

     The Company intends to apply to the Internal Revenue Service for a ruling
regarding the tax aspects of the Plan. If the Company does not receive a
favorable tax ruling before the last day of the first Payment Period under the
Plan, December 31, 1991, the Company reserves the right to rescind all options
granted to employees on the first day of such Payment Period, in which event all
payroll deductions will be promptly refunded to participating employees without
interest.

Article 21 - Approval of Shareholders.
-------------------------------------

     The Plan shall be subject to approval by the holders of a majority of the
shares of the Common Stock of the Company present or represented by proxy at a
duly called meeting of shareholders, which approval must occur by April 22,
1992. The Plan was adopted by the Board of Directors on April 22, 1991 subject
to approval by the shareholders. In the event that the approval of the
shareholders is not received by April 22, 1992, any and all options granted
prior to April 22, 1992 shall be rescinded, and the Company will promptly refund
the entire balance of each participating employee's deductions. In addition, in
such event the Plan will be deemed terminated as of April 22, 1992.
<PAGE>

                                AMENDMENT NO. 1

                                    TO THE

                               DAVOX CORPORATION

                       1991 EMPLOYEE STOCK PURCHASE PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on January 26, 2000, the Corporation's 1991 Employee Stock
Purchase Plan (the "Plan") is amended effective as of such date by:

1.   Amending Article 4 thereof to increase the aggregate number of shares which
may be issued pursuant to the Plan to 450,000 shares.

Except as modified hereby, the Plan shall remain in full force and effect.<PAGE>

                                                                     Exhibit 4.4

                               DAVOX CORPORATION

                                1996 STOCK PLAN
                                ---------------

     1.  Purpose. The purpose of the Davox Corporation 1996 Stock Plan (the
         -------
"Plan") is to encourage key employees of Davox Corporation (the "Company") and
of any present or future parent or subsidiary of the Company (collectively,
"Related Corporations") and other individuals who render services to the Company
or a Related Corporation, by providing opportunities to participate in the
ownership of the Company and its future growth through (a) the grant of options
which qualify as "incentive stock options" ("ISOs") under Section 422(b) of the
Internal Revenue Code of 1986, as amended (the "Code"); (b) the grant of options
which do not qualify as ISOs ("Non-Qualified Options"); (c) awards of stock in
the Company ("Awards"); and (d) opportunities to make direct purchases of stock
in the Company ("Purchases"). Both ISOs and Non-Qualified Options are referred
to hereafter individually as an "Option" and collectively as "Options." Options,
Awards and authorizations to make Purchases are referred to hereafter
collectively as "Stock Rights." As used herein, the terms "parent" and
"subsidiary" mean "parent corporation" and "subsidiary corporation,"
respectively, as those terms are defined in Section 424 of the Code.

     2.   Administration of the Plan.
          ---------------------------

          A.   Board or Committee Administration.  The Plan shall be
               ---------------------------------
     administered by the Board of Directors of the Company (the "Board") or,
     subject to Paragraph 2D (relating to compliance with Section 162(m) of the
     Code), by a committee appointed by the Board (the "Committee").
     Hereinafter, all references in this Plan to the "Committee" shall mean the
     Board if no Committee has been appointed. Subject to ratification of the
     grant or authorization of each Stock Right by the Board (if so required by
     applicable state law), and subject to the terms of the Plan, the Committee
     shall have the authority to (i) determine to whom (from among the class of
     employees eligible under paragraph 3 to receive ISOs) ISOs shall be
     granted, and to whom (from among the class of individuals and entities
     eligible under paragraph 3 to receive Non-Qualified Options and Awards and
     to make Purchases) Non-Qualified Options, Awards and authorizations to make
     Purchases may be granted; (ii) determine the time or times at which Options
     or Awards shall be granted or Purchases made; (iii) determine the purchase
     price of shares subject to each Option or Purchase, which prices shall not
     be less than the minimum price specified in paragraph 6; (iv) determine
     whether each Option granted shall be an ISO or a Non-Qualified Option; (v)
     determine (subject to paragraph 7) the time or times when each Option shall
     become exercisable and the duration of the exercise period; (vi) extend the
     period during which outstanding Options may be exercised; (vii) determine
     whether restrictions such as repurchase options are to be imposed on shares
     subject to Options, Awards and Purchases and the nature of such
     restrictions, if any, and (viii) interpret the Plan and prescribe and
     rescind rules and regulations relating to it. If the Committee determines
     to issue a Non-Qualified Option, it shall take whatever actions it deems
     necessary, under Section 422 of the Code and the regulations promulgated
     thereunder, to ensure that such Option is not treated as an ISO. The
     interpretation and construction by the Committee of any provisions of the
     Plan or of any Stock Right granted under it shall be final unless otherwise
     determined by the Board. The Committee may from time to time adopt such
     rules and regulations for carrying out the Plan as it may deem advisable.
     No member of the Board or the Committee shall be liable for any action or
     determination made in good faith with respect to the Plan or any Stock
     Right granted under it.

          B.   Committee Actions.  The Committee may select one of its members
               -----------------
     as its chairman, and shall hold meetings at such time and places as it may
     determine. A majority of the Committee
<PAGE>

     shall constitute a quorum and acts of a majority of the members of the
     Committee at a meeting at which a quorum is present, or acts reduced to or
     approved in writing by all the members of the Committee (if consistent with
     applicable state law), shall be the valid acts of the Committee. From time
     to time the Board may increase the size of the Committee and appoint
     additional members thereof, remove members (with or without cause) and
     appoint new members in substitution therefor, fill vacancies however
     caused, or remove all members of the Committee and thereafter directly
     administer the Plan.

          C.   Grant of Stock Rights to Board Members.  Stock Rights may be
               --------------------------------------
     granted to members of the Board. All grants of Stock Rights to members of
     the Board shall in all respects be made in accordance with the provisions
     of this Plan applicable to other eligible persons. Members of the Board who
     either (i) are eligible to receive grants of Stock Rights pursuant to the
     Plan or (ii) have been granted Stock Rights may vote on any matters
     affecting the administration of the Plan or the grant of any Stock Rights
     pursuant to the Plan, except that no such member shall act upon the
     granting to himself or herself of Stock Rights, but any such member may be
     counted in determining the existence of a quorum at any meeting of the
     Board during which action is taken with respect to the granting to such
     member of Stock Rights.

          D.   Performance-Based Compensation.  The Board, in its discretion,
               ------------------------------
     may take such action as may be necessary to ensure that Stock Rights
     granted under the Plan qualify as "qualified performance-based
     compensation" within the meaning of Section 162(m) of the Code and
     applicable regulations promulgated thereunder ("Performance-Based
     Compensation"). Such action may include, in the Board's discretion, some or
     all of the following (i) if the Board determines that Stock Rights granted
     under the Plan generally shall constitute Performance-Based Compensation,
     the Plan shall be administered, to the extent required for such Stock
     Rights to constitute Performance-Based Compensation, by a Committee
     consisting solely of two or more "outside directors" (as defined in
     applicable regulations promulgated under Section 162(m) of the Code), (ii)
     if any Non-Qualified Options with an exercise price less than the fair
     market value per share of Common Stock are granted under the Plan and the
     Board determines that such Options should constitute Performance-Based
     Compensation, such options shall be made exercisable only upon the
     attainment of a pre-established, objective performance goal established by
     the Committee, and such grant shall be submitted for, and shall be
     contingent upon shareholder approval and (iii) Stock Rights granted under
     the Plan may be subject to such other terms and conditions as are necessary
     for compensation recognized in connection with the exercise or disposition
     of such Stock Right or the disposition of Common Stock acquired pursuant to
     such Stock Right, to constitute Performance-Based Compensation.

     3.  Eligible Employees and Others. ISOs may be granted only to employees of
         -----------------------------
the Company or any Related Corporation. Non-Qualified Options, Awards and
authorizations to make Purchases may be granted to any employee, officer or
director (whether or not also an employee) or consultant of the Company or any
Related Corporation. The Committee may take into consideration a recipient's
individual circumstances in determining whether to grant a Stock Right. The
granting of any Stock Right to any individual or entity shall neither entitle
that individual or entity to, nor disqualify such individual or entity from,
participation in any other grant of Stock Rights.

     4.  Stock.  The stock subject to Stock Rights shall be authorized but
         -----
unissued shares of Common Stock of the Company, par value $.10 per share (the
"Common Stock"), or shares of Common Stock reacquired by the Company in any
manner. The aggregate number of shares which may be issued pursuant to the Plan
is equal to the "Plan Share Limit" as defined below. If any Option granted under
the Plan shall expire or terminate for any reason without having been exercised
in full or shall cease for any reason to be exercisable in whole or in part or
shall be repurchased by the Company, the unpurchased
<PAGE>

shares of Common Stock subject to such Option shall again be available for
grants of Stock Rights under the Plan.

     For purposes of this Plan the "Plan Share Limit" shall be 900,000 shares,
such total to include the number of shares that are available for grant, award
or purchase under the Company's 1986 Stock Plan (the "Old Plan") at the time of
expiration of the Old Plan.

     No employee of the Company or any Related Corporation may be granted
Options to acquire, in the aggregate, more than 500,000 shares of Common Stock
during any fiscal year of the Company. If any Option granted under the Plan
shall expire or terminate for any reason without having been exercised in full
or shall cease for any reason to be exercisable in whole or in part or shall be
repurchased by the Company, the shares subject to such Option shall be included
in the determination of the aggregate number of shares of Common Stock deemed to
have been granted to such employee under the Plan.

     5.   Granting of Stock Rights.  Stock Rights may be granted under the Plan
          ------------------------
at any time on or after July 25, 1996 and prior to July 25, 2006. The date of
grant of a Stock Right under the Plan will be the date specified by the
Committee at the time it grants the Stock Right; provided, however, that such
date shall not be prior to the date on which the Committee acts to approve the
grant.

     6.   Minimum Option Price; ISO Limitations.
          -------------------------------------

          A.   Price for Non-Qualified Options, Awards and Purchases.  Subject
               -----------------------------------------------------
     to Paragraph 2D (relating to compliance with Section 162(m) of the Code),
     the exercise price per share specified in the agreement relating to each
     Non-Qualified Option granted, and the purchase price per share of stock
     granted in any Award or authorized as a Purchase, under the Plan may be
     less than the fair market value of the Common Stock of the Company on the
     date of grant, provided that, in no event shall such exercise price or such
     purchase price be less than the minimum legal consideration required
     therefor under the laws of any jurisdiction in which the Company or its
     successors in interest may be organized. The Committee may, in its
     discretion, subject any Stock Right granted under the Plan to any terms or
     conditions necessary for compensation recognized in connection with the
     exercise of such Stock Right or the disposition of Common Stock acquired
     pursuant to such Stock Right, to constitute qualified performance-based
     compensation under Section 162(m) of the Code and applicable regulations
     promulgated thereunder.

          B.   Price for ISOs.  The exercise price per share specified in the
               --------------
     agreement relating to each ISO granted under the Plan shall not be less
     than the fair market value per share of Common Stock on the date of such
     grant. In the case of an ISO to be granted to an employee owning stock
     possessing more than ten percent (10%) of the total combined voting power
     of all classes of stock of the Company or any Related Corporation, the
     price per share specified in the agreement relating to such ISO shall not
     be less than one hundred ten percent (110%) of the fair market value per
     share of Common Stock on the date of grant. For purposes of determining
     stock ownership under this paragraph, the rules of Section 424(d) of the
     Code shall apply. The date of grant for purposes of this subparagraph shall
     mean the date that the Company or a Related Corporation completes the
     corporate action constituting an offer of stock for sale to an individual.

          C.   $100,000 Annual Limitation on ISO Vesting.  Each eligible
               -----------------------------------------
     employee may be granted Options treated as ISOs only to the extent that, in
     the aggregate under this Plan and all incentive stock option plans of the
     Company and any Related Corporation, ISOs do not become exercisable for the
     first time by such employee during any calendar year with respect to stock
     having a fair market value (determined at the time the ISOs were granted)
     in excess of $100,000. The Company intends to designate any Options granted
     in excess of such limitation as Non-
<PAGE>

     Qualified Options and the Company shall issue separate certificates to the
     optionee with respect to Options that are Non-Qualified Options and Options
     that are ISOs.

          D.   Determination of Fair Market Value.  If, at the time an Option
               ----------------------------------
     is granted under the Plan, the Company's Common Stock is publicly traded,
     "fair market value" shall be determined as of the date of grant or, if the
     prices or quotes discussed in this sentence are unavailable for such date,
     the last business day for which such prices or quotes are available prior
     to the date of grant and shall mean (i) the average (on that date) of the
     high and low prices of the Common Stock on the principal national
     securities exchange on which the Common Stock is traded, if the Common
     Stock is then traded on a national securities exchange; or (ii) the last
     reported sale price (on that date) of the Common Stock on the Nasdaq
     National Market, if the Common Stock is not then traded on a national
     securities exchange; or (iii) the closing bid price (or average of bid
     prices) last quoted (on that date) by an established quotation service for
     over-the-counter securities, if the Common Stock is not reported on the
     Nasdaq National Market. If the Common Stock is not publicly traded at the
     time an Option is granted under the Plan, "fair market value" shall mean
     the fair value of the Common Stock as determined by the Committee after
     taking into consideration all factors which it deems appropriate,
     including, without limitation, recent sale and offer prices of the Common
     Stock in private transactions negotiated at arm's length.

     7.   Option Duration.  Subject to earlier termination as provided in
          ---------------
paragraphs 9 and 10 or in the agreement relating to such Option, each Option
shall expire on the date specified by the Committee, but not more than (i) ten
years from the date of grant in the case of Options generally and (ii) five
years from the date of grant in the case of ISOs granted to an employee owning
stock possessing more than ten percent (10%) of the total combined voting power
of all classes of stock of the Company or any Related Corporation, as determined
under paragraph 6(B). Subject to earlier termination as provided in paragraphs 9
and 10, the term of each ISO shall be the term set forth in the original
instrument granting such ISO, except with respect to any part of such ISO that
is converted into a Non-Qualified Option pursuant to paragraph 16.

     8.   Exercise of Option.  Subject to the provisions of Paragraphs 9 through
          ------------------
12, each Option granted under the Plan shall be exercisable as follows:

          A.   Vesting.  The Option shall either be fully exercisable on the
               -------
     date of grant or shall become exercisable thereafter in such installments
     as the Committee may specify.

          B.   Full Vesting of Installments.  Once an installment becomes
               ----------------------------
     exercisable it shall remain exercisable until expiration or termination of
     the Option, unless otherwise specified by the Committee.

          C.   Partial Exercise.  Each Option or installment may be exercised
               ----------------
     at any time or from time to time, in whole or in part, for up to the total
     number of shares with respect to which it is then exercisable.

          D.  Acceleration of Vesting.  The Committee shall have the right to
              -----------------------
     accelerate the date that any installment of any Option becomes exercisable;
     provided that the Committee shall not, without the consent of an optionee,
     accelerate the permitted exercise date of any installment of any Option
     granted to any employee as an ISO (and not previously converted into a Non-
     Qualified Option pursuant to paragraph 16) if such acceleration would
     violate the annual vesting limitation contained in Section 422(d) of the
     Code, as described in paragraph 6(C).

     9.  Termination of Employment.  Unless otherwise specified in the agreement
         -------------------------
relating to such ISO, if an ISO optionee ceases to be employed by the Company
and all Related Corporations other than
<PAGE>

by reason of death or disability as defined in paragraph 10, no further
installments of his or her ISOs shall become exercisable, and his or her ISOs
shall terminate on the earlier of (a) three months after the date of termination
of his or her employment, or (b) their specified expiration dates, except to the
extent that such ISOs (or unexercised installments thereof) have been converted
into Non-Qualified Options pursuant to paragraph 16. For purposes of this
paragraph 9, employment shall be considered as continuing uninterrupted during
any bona fide leave of absence (such as those attributable to illness, military
obligations or governmental service) provided that the period of such leave does
not exceed 90 days or, if longer, any period during which such optionee's right
to reemployment is guaranteed by statute or by contract. A bona fide leave of
absence with the written approval of the Committee shall not be considered an
interruption of employment under this paragraph 9, provided that such written
approval contractually obligates the Company or any Related Corporation to
continue the employment of the optionee after the approved period of absence.
ISOs granted under the Plan shall not be affected by any change of employment
within or among the Company and Related Corporations, so long as the optionee
continues to be an employee of the Company or any Related Corporation. Nothing
in the Plan shall be deemed to give any grantee of any Stock Right the right to
be retained in employment or other service by the Company or any Related
Corporation for any period of time.

     10.  Death; Disability.
          -----------------

             A.   Death.  If an ISO optionee ceases to be employed by the
                  -----
     Company and all Related Corporations by reason of his or her death, any ISO
     owned by such optionee may be exercised, to the extent otherwise
     exercisable on the date of death, by the estate, personal representative or
     beneficiary who has acquired the ISO by will or by the laws of descent and
     distribution, until the earlier of (i) the specified expiration date of the
     ISO or (ii) 180 days from the date of the optionee's death.

             B.  Disability.  If an ISO optionee ceases to be employed by the
                 ----------
     Company and all Related Corporations by reason of his or her disability,
     such optionee shall have the right to exercise any ISO held by him or her
     on the date of termination of employment, for the number of shares for
     which he or she could have exercised it on that date, until the earlier of
     (i) the specified expiration date of the ISO or (ii) 180 days from the date
     of the termination of the optionee's employment. For the purposes of the
     Plan, the term "disability" shall mean "permanent and total disability" as
     defined in Section 22(e)(3) of the Code or any successor statute.

     11.     Assignability.  No Stock Right shall be assignable or transferable
             -------------
by the grantee except by will, by the laws of descent and distribution or, in
the case of Non-Qualified Options only, pursuant to a valid domestic relations
order. Except as set forth in the previous sentence, during the lifetime of a
grantee each Stock Right shall be exercisable only by such grantee.

     12.     Terms and Conditions of Options.  Options shall be evidenced by
             -------------------------------
instruments (which need not be identical) in such forms as the Committee may
from time to time approve. Such instruments shall conform to the terms and
conditions set forth in paragraphs 6 through 11 hereof and may contain such
other provisions as the Committee deems advisable which are not inconsistent
with the Plan, including restrictions applicable to shares of Common Stock
issuable upon exercise of Options. The Committee may specify that any Non-
Qualified Option shall be subject to the restrictions set forth herein with
respect to ISOs, or to such other termination and cancellation provisions as the
Committee may determine. The Committee may from time to time confer authority
and responsibility on one or more of its own members and/or one or more officers
of the Company to execute and deliver such instruments. The proper officers of
the Company are authorized and directed to take any and all action necessary or
advisable from time to time to carry out the terms of such instruments.
<PAGE>

     13.  Adjustments.  Upon the occurrence of any of the following events, an
          -----------
optionee's rights with respect to Options granted to such optionee hereunder
shall be adjusted as hereinafter provided, unless otherwise specifically
provided in the written agreement between the optionee and the Company relating
to such Option:

             A.  Stock Dividends and Stock Splits.  If the shares of Common
                 --------------------------------
     Stock shall be subdivided or combined into a greater or smaller number of
     shares or if the Company shall issue any shares of Common Stock as a stock
     dividend on its outstanding Common Stock, the number of shares of Common
     Stock deliverable upon the exercise of Options shall be appropriately
     increased or decreased proportionately, and appropriate adjustments shall
     be made in the purchase price per share to reflect such subdivision,
     combination or stock dividend.

             B.  Consolidations or Mergers.  If the Company is to be
                 -------------------------
     consolidated with or acquired by another entity in a merger or other
     reorganization in which the holders of the outstanding voting stock of the
     Company immediately preceding the consummation of such event, shall,
     immediately following such event, hold, as a group, less than a majority of
     the voting securities of the surviving or successor entity, or in the event
     of a sale of all or substantially all of the Company's assets or otherwise
     (each, an "Acquisition"), the Committee or the board of directors of any
     entity assuming the obligations of the Company hereunder (the "Successor
     Board"), shall, as to outstanding Options, either (i) make appropriate
     provision for the continuation of such Options by substituting on an
     equitable basis for the shares then subject to such Options either (a) the
     consideration payable with respect to the outstanding shares of Common
     Stock in connection with the Acquisition, (b) shares of stock of the
     surviving or successor corporation or (c) such other securities as the
     Successor Board deems appropriate, the fair market value of which shall not
     materially exceed the fair market value of the shares of Common Stock
     subject to such Options immediately preceding the Acquisition; or (ii) upon
     written notice to the optionees, provide that all Options must be
     exercised, to the extent then exercisable or to be exercisable as a result
     of the Acquisition, within a specified number of days of the date of such
     notice, at the end of which period the Options shall terminate; or (iii)
     terminate all Options in exchange for a cash payment equal to the excess of
     the fair market value of the shares subject to such Options (to the extent
     then exercisable or to be exercisable as a result of the Acquisition) over
     the exercise price thereof.

             C.  Recapitalization or Reorganization.  In the event of a
                 ----------------------------------
     recapitalization or reorganization of the Company (other than a transaction
     described in subparagraph B above) pursuant to which securities of the
     Company or of another corporation are issued with respect to the
     outstanding shares of Common Stock, an optionee upon exercising an Option
     shall be entitled to receive for the purchase price paid upon such exercise
     the securities he or she would have received if he or she had exercised
     such Option prior to such recapitalization or reorganization.

             D.  Modification of ISOs.  Notwithstanding the foregoing, any
                 --------------------
     adjustments made pursuant to subparagraphs A, B or C with respect to ISOs
     shall be made only after the Committee, after consulting with counsel for
     the Company, determines whether such adjustments would constitute a
     "modification" of such ISOs (as that term is defined in Section 424 of the
     Code) or would cause any adverse tax consequences for the holders of such
     ISOs. If the Committee determines that such adjustments made with respect
     to ISOs would constitute a modification of such ISOs or would cause adverse
     tax consequences to the holders, it may refrain from making such
     adjustments.

             E.  Dissolution or Liquidation.  In the event of the proposed
                 --------------------------
     dissolution or liquidation of the Company, each Option will terminate
     immediately prior to the consummation of such proposed action or at such
     other time and subject to such other conditions as shall be determined by
     the Committee.
<PAGE>

          F.   Issuances of Securities.  Except as expressly provided herein,
               -----------------------
     no issuance by the Company of shares of stock of any class, or securities
     convertible into shares of stock of any class, shall affect, and no
     adjustment by reason thereof shall be made with respect to, the number or
     price of shares subject to Options. No adjustments shall be made for
     dividends paid in cash or in property other than securities of the Company.

          G.   Fractional Shares.  No fractional shares shall be issued under
               -----------------
     the Plan and the optionee shall receive from the Company cash in lieu of
     such fractional shares.

          H.   Adjustments.  Upon the happening of any of the events described
               -----------
     in subparagraphs A, B or C above, the class and aggregate number of shares
     set forth in paragraph 4 hereof that are subject to Stock Rights which
     previously have been or subsequently may be granted under the Plan shall
     also be appropriately adjusted to reflect the events described in such
     subparagraphs. The Committee or the Successor Board shall determine the
     specific adjustments to be made under this paragraph 13 and, subject to
     paragraph 2, its determination shall be conclusive.

     14.  Means of Exercising Options.  An Option (or any part or installment
          ---------------------------
thereof) shall be exercised by giving written notice to the Company at its
principal office address, or to such transfer agent as the Company shall
designate. Such notice shall identify the Option being exercised and specify the
number of shares as to which such Option is being exercised, accompanied by full
payment of the purchase price therefor either (a) in United States dollars in
cash or by check, (b) at the discretion of the Committee, through delivery of
shares of Common Stock having a fair market value equal as of the date of the
exercise to the cash exercise price of the Option, (c) at the discretion of the
Committee, by delivery of the grantee's personal recourse note bearing interest
payable not less than annually at no less than 100% of the lowest applicable
Federal rate, as defined in Section 1274(d) of the Code, (d) at the discretion
of the Committee and consistent with applicable law, through the delivery of an
assignment to the Company of a sufficient amount of the proceeds from the sale
of the Common Stock acquired upon exercise of the Option and an authorization to
the broker or selling agent to pay that amount to the Company, which sale shall
be at the participant's direction at the time of exercise, or (e) at the
discretion of the Committee, by any combination of (a), (b), (c) and (d) above.
If the Committee exercises its discretion to permit payment of the exercise
price of an ISO by means of the methods set forth in clauses (b), (c), (d) or
(e) of the preceding sentence, such discretion shall be exercised in writing at
the time of the grant of the ISO in question. The holder of an Option shall not
have the rights of a shareholder with respect to the shares covered by such
Option until the date of issuance of a stock certificate to such holder for such
shares. Except as expressly provided above in paragraph 13 with respect to
changes in capitalization and stock dividends, no adjustment shall be made for
dividends or similar rights for which the record date is before the date such
stock certificate is issued.

     15.  Term and Amendment of Plan.  This Plan was adopted by the Board on
          --------------------------
July 25, 1996, subject, with respect to the validation of ISOs granted under the
Plan, to approval of the Plan by the stockholders of the Company at the next
Meeting of Stockholders or, in lieu thereof, by written consent. If the approval
of stockholders is not obtained prior to July 25, 1997, any grants of ISOs under
the Plan made prior to that date shall be Non-Qualified Options. The Plan shall
expire at the end of the day on July 24, 2006 (except as to Options outstanding
on that date). Subject to the provisions of paragraph 5 above, Options may be
granted under the Plan prior to the date of stockholder approval of the Plan.
The Board may terminate or amend the Plan in any respect at any time, except
that, without the approval of the stockholders obtained within 12 months before
or after the Board adopts a resolution authorizing any of the following actions:
(a) the total number of shares that may be issued under the Plan may not be
increased (except by adjustment pursuant to paragraph 13); (b) the provisions of
paragraph 3 regarding eligibility for grants of ISOs may not be modified; (c)
the provisions of paragraph 6(B) regarding the
<PAGE>

exercise price at which shares may be offered pursuant to ISOs may not be
modified (except by adjustment pursuant to paragraph 13); and (d) the expiration
date of the Plan may not be extended. Except as otherwise provided in this
paragraph 15, in no event may action of the Board or stockholders alter or
impair the rights of a grantee, without such grantee's consent, under any Stock
Right previously granted to such grantee.

     16.  Modifications of ISOs; Conversion of ISOs into Non-Qualified Options.
          --------------------------------------------------------------------
Subject to Paragraph 13D, without the prior written consent of the holder of an
ISO, the Committee shall not alter the terms of such ISO (including the means of
exercising such ISO) if such alteration would constitute a modification (within
the meaning of Section 424(h)(3) of the Code). The Committee, at the written
request or with the written consent of any optionee, may in its discretion take
such actions as may be necessary to convert such optionee's ISOs (or any
installments or portions of installments thereof) that have not been exercised
on the date of conversion into Non-Qualified Options at any time prior to the
expiration of such ISOs, regardless of whether the optionee is an employee of
the Company or a Related Corporation at the time of such conversion. Such
actions may include, but shall not be limited to, extending the exercise period
or reducing the exercise price of the appropriate installments of such ISOs. At
the time of such conversion, the Committee (with the consent of the optionee)
may impose such conditions on the exercise of the resulting Non-Qualified
Options as the Committee in its discretion may determine, provided that such
conditions shall not be inconsistent with this Plan. Nothing in the Plan shall
be deemed to give any optionee the right to have such optionee's ISOs converted
into Non-Qualified Options, and no such conversion shall occur until and unless
the Committee takes appropriate action. Upon the taking of such action, the
Company shall issue separate certificates to the optionee with respect to
Options that are Non-Qualified Options and Options that are ISOs.

     17.  Application Of Funds.  The proceeds received by the Company from the
          --------------------
sale of shares pursuant to Options granted and Purchases authorized under the
Plan shall be used for general corporate purposes.

     18.  Notice to Company of Disqualifying Disposition.  By accepting an ISO
          ----------------------------------------------
granted under the Plan, each optionee agrees to notify the Company in writing
immediately after such optionee makes a Disqualifying Disposition (as described
in Sections 421, 422 and 424 of the Code and regulations thereunder) of any
stock acquired pursuant to the exercise of ISOs granted under the Plan. A
Disqualifying Disposition is generally any disposition occurring on or before
the later of (a) the date two years following the date the ISO was granted or
(b) the date one year following the date the ISO was exercised.

     19.  Withholding of Additional Income Taxes.  Upon the exercise of a Non-
          --------------------------------------
Qualified Option, the grant of an Award, the making of a Purchase of Common
Stock for less than its fair market value, the making of a Disqualifying
Disposition (as defined in paragraph 18), the vesting or transfer of restricted
stock or securities acquired on the exercise of an Option hereunder, or the
making of a distribution or other payment with respect to such stock or
securities, the Company may withhold taxes in respect of amounts that constitute
compensation includible in gross income. The Committee in its discretion may
condition (i) the exercise of an Option, (ii) the grant of an Award, (iii) the
making of a Purchase of Common Stock for less than its fair market value, or
(iv) the vesting or transferability of restricted stock or securities acquired
by exercising an Option, on the grantee's making satisfactory arrangement for
such withholding. Such arrangement may include payment by the grantee in cash or
by check of the amount of the withholding taxes or, at the discretion of the
Committee, by the grantee's delivery of previously held shares of Common Stock
or the withholding from the shares of Common Stock otherwise
<PAGE>

deliverable upon exercise of a Option shares having an aggregate fair market
value equal to the amount of such withholding taxes.

     20.  Governmental Regulation.  The Company's obligation to sell and deliver
          -----------------------
shares of the Common Stock under this Plan is subject to the approval of any
governmental authority required in connection with the authorization, issuance
or sale of such shares.

     Government regulations may impose reporting or other obligations on the
Company with respect to the Plan. For example, the Company may be required to
send tax information statements to employees and former employees that exercise
ISOs under the Plan, and the Company may be required to file tax information
returns reporting the income received by grantees of Options in connection with
the Plan.

     21.  Governing Law.  The validity and construction of the Plan and the
          -------------
instruments evidencing Options shall be governed by the laws of the State of
Delaware, or the laws of any jurisdiction in which the Company or its successors
in interest may be organized.
<PAGE>

                                AMENDMENT NO. 1

                                    TO THE

                               DAVOX CORPORATION

                                1996 STOCK PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on April 27, 1997, the Corporation's 1996 Stock Plan (the
"Plan") is amended effective as of such date by:

1.   Amending and restating Section 6(A) thereof so that said Section 6(A) shall
read in its entirety as follows:

"A.  Price for non-Qualified Options, Awards and Purchases.  Subject to
     ------------------------------------------------------
Paragraph 2D (relating to compliance with Section 162(m) of the Code), the
exercise price per share specified in the agreement relating to each Non-
Qualified Option granted, and the purchase price per share of stock granted in
any Award or authorized as a Purchase, under the Plan may be less than the fair
market value of the Common Stock of the Company on the date of grant, provided
that (i) in no event shall such exercise price or such purchase price be less
than the minimum legal consideration required therefor under the laws of any
jurisdiction in which the Company or its successors in interest may be
organized, (ii) options representing the right to purchase in the aggregate a
maximum of ten percent (10%) of the number of shares authorized under the Plan
(as set forth in Section 4 hereof) may be granted with exercise prices below
fair market value, and (iii) no option may be granted with an exercise price of
less than eighty-five percent (85%) of fair market value. The Committee may, in
its discretion, subject any Stock Right granted under the Plan to any terms or
conditions necessary for compensation recognized in connection with the exercise
of such Stock Right or the disposition of Common Stock acquired pursuant to such
Stock Right, to constitute qualified performance-based compensation under
Section 162(m) of the Code and applicable regulations promulgated thereunder."

Except as modified hereby, the Plan shall remain in full force and effect.
<PAGE>

                                AMENDMENT NO. 2

                                    TO THE

                               DAVOX CORPORATION

                                1996 STOCK PLAN

     Pursuant to actions taken by the Board of Directors of Davox Corporation
(the "Corporation"), the Corporation's 1996 Stock Plan (the "Plan") is amended
as follows:

1.   Amending Section 4 thereof to increase the Plan Share Limit so that the
aggregate number of shares which may be issued pursuant to the Plan is increased
to 1,950,000 shares.

Except as modified hereby, the Plan shall remain in full force and effect.
<PAGE>

                                AMENDMENT NO. 3
                                    TO THE
                               DAVOX CORPORATION
                                1996 STOCK PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on July 23, 1998, the Corporation's 1996 Stock Plan (the
"Plan") is amended effective as of such date by:

     1.   Amending and restating the first (1st) sentence of Section 2(C) of the
Plan so that said sentence shall read in its entirety as follows:

          "Stock Rights may be granted to members of the Board who are also
          employees of the Company; members of the Board who are not employees
          of the Company shall not be eligible to receive Stock Rights."

     2.   Amending and restating the second (2nd) sentence of Section 3 of the
Plan so that said sentence shall read in its entirety as follows:

          "Non-Qualified Options, Awards and authorizations to make Purchases
          may be granted to any employee, officer or director (provided such
          director is also an employee) or consultant of the Company or any
          Related Corporation."

     3.   Amending and restating the fifth (5th) sentence of Section 15 of the
Plan so that said sentence shall read in its entirety as follows:

          "The Board may terminate or amend the Plan in any respect at any time,
          except that, without the approval of the stockholders obtained within
          12 months before or after the Board adopts a resolution authorizing
          any of the following actions: (a) the total number of shares that may
          be issued under the Plan may not be increased (except by adjustment
          pursuant to paragraph 13); (b) the provisions of paragraph 3 regarding
          eligibility for grants of Stock Rights may not be modified; (c) the
          provisions of paragraph 6(B) regarding the exercise price at which
          shares may be offered pursuant to ISOs may not be modified (except by
          adjustment pursuant to paragraph 13); (d) the expiration date of the
          Plan may not be extended; (e) the exercise price of more than ten
          percent (10%) of outstanding ISOs may not be reduced; and (f) benefits
          under the Plan and the group of persons eligible to receive Stock
          Rights under the Plan may not be increased."

     Except as modified hereby, the Plan shall remain in full force and effect.
<PAGE>

                                AMENDMENT NO. 4

                                    TO THE

                               DAVOX CORPORATION

                                1996 STOCK PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on January 26, 1999, the Corporation's 1996 Stock Plan (the
"Plan") is amended effective as of such date by:

1.   Amending Section 4 thereof to increase the Plan Share Limit so that the
aggregate number of shares which may be issued pursuant to the Plan is increased
to 2,700,000 shares.

Except as modified hereby, the Plan shall remain in full force and effect.
<PAGE>

                                AMENDMENT NO. 5

                                    TO THE

                               DAVOX CORPORATION

                                1996 STOCK PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on January 26, 2000, the Corporation's 1996 Stock Plan (the
"Plan") is amended effective as of such date by:

1.   Amending Section 4 thereof to increase the Plan Share Limit so that the
aggregate number of shares which may be issued pursuant to the Plan is increased
to 3,350,000 shares.

Except as modified hereby, the Plan shall remain in full force and effect.
<PAGE>

                                AMENDMENT NO. 6

                                    TO THE

                               DAVOX CORPORATION

                                1996 STOCK PLAN

     Pursuant to action taken by the Board of Directors of Davox Corporation
(the "Corporation") on May 4, 2000, the Corporation's 1996 Stock Plan (the
"Plan") is amended effective as of such date by:

1.   Amending and restating the fifth (5th) sentence of Section 15 of the Plan
so that said sentence shall read in its entirety as follows:

          "The Board may terminate or amend the Plan in any respect at any time,
          except that, without the approval of the stockholders obtained within
          12 months before or after the Board adopts a resolution authorizing
          any of the following actions: (a) the total number of shares that may
          be issued under the Plan may not be increased (except by adjustment
          pursuant to paragraph 13); (b) the provisions of paragraph 3 regarding
          eligibility for grants of Stock Rights may not be modified; (c) the
          provisions of paragraph 6(B) regarding the exercise price at which
          shares may be offered pursuant to ISOs may not be modified (except by
          adjustment pursuant to paragraph 13); (d) the expiration date of the
          Plan may not be extended; (e) the exercise price of more than ten
          percent (10%) of outstanding Non-Qualified Options and ISOs may not be
          reduced; and (f) benefits under the Plan and the group of persons
          eligible to receive Stock Rights under the Plan may not be increased."

Except as modified hereby, the Plan shall remain in full force and effect.

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