Document:

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                                                                   Exhibit 10.16

                             NETWORK ENGINES, INC.

                           1999 Stock Incentive Plan

                                First Amendment
                                ---------------

     The Network Engines, Inc. 1999 Stock Incentive Plan, pursuant to Section
9(e) thereof, is hereby amended as follows, effective as of March 16, 2000.

     Section 4(a) is amended to read in its entirety as follows:

          Subject to adjustment under Section 4(c), Awards may initially be made
          under the Plan for up to an aggregate of 8,047,902 shares (after
          taking into account the 2.5-for-1 stock split approved by the Board on
          May 15, 2000 (the "Stock Split")) of Common Stock; provided, however,
          that on October 1 of each year commencing on October 1, 2000 through
          and including October 1, 2008, the number of shares of Common Stock
          reserved for issuance under the Plan shall be automatically increased
          by the lesser of (a) 4,000,000 shares (after taking into account the
          Stock Split), (b) 5% of the Company's outstanding stock on such date
          or (c) an amount determined by the Board. Except as provided below, in
          no event may the aggregate number of shares of Common Stock issued
          pursuant to Incentive Stock Options (as hereinafter defined) and any
          other Awards during the life of the Plan exceed 20,047,902 (after
          taking into account the Stock Split). If any Award expires or is
          terminated, surrendered or canceled without having been fully
          exercised or is forfeited in whole or in part or results in any Common
          Stock not being issued, the unused Common Stock covered by such Award
          shall again be available for the grant of Awards under the Plan,
          subject, however, in the case of Incentive Stock Options, to any
          limitation required under the Code. Shares issued under the Plan may
          consist in whole or in part of authorized but unissued shares or
          treasury shares.

                               Adopted by the Board of Directors: March 16, 2000

                               Approved by the Stockholders:            , 2000
                                                             -----------<PAGE>

                                                                     Exhibit 4.2

          The security represented by this certificate was originally
          issued on April 8, 1999 has not been registered under the
          Securities Act of 1933, as amended (the "Securities Act"),
          and may not be transferred unless a registration statement
          under the Securities Act is in effect with respect to such
          security at the time of such transfer except pursuant to (i)
          an effective registration statement under the Securities
          Act, (ii) Rule 144 under the Securities Act (or any other
          rule under the Securities Act relating to the disposition of
          securities), or (iii) an opinion of counsel, reasonably
          satisfactory to counsel for the Company, that an exemption
          from such registration is available.

                    NET-tel Communications, Inc.

                       STOCK PURCHASE WARRANT
                       ----------------------

Date of Issuance:  April 8, 1999                             Certificate No. W-3

          FOR VALUE RECEIVED, NET-tel Communications, Inc., a Delaware
corporation (the "Company"), hereby grants to Leasing Technologies
International, Inc. ("LTI") or its registered assigns (the "Registered Holder")
the right to purchase from the Company 12,500 shares of Warrant Stock at a price
per share of $8.00 (as adjusted from time to time hereunder, the "Exercise
Price") as provided herein. This Stock Purchase Warrant (this "Warrant") is one
of two warrants issued in connection with the transactions contemplated by that
certain Master Lease Agreement dated as of April 8, 1999 between NET-tel
Corporation and LTI. Certain capitalized terms used herein are defined in
Section 4 or Section 7 hereof, as applicable. The amount and kind of securities
obtainable pursuant to the rights granted hereunder and the purchase price for
such securities are subject to adjustment pursuant to the provisions contained
in this Warrant.

          This Warrant is subject to the following provisions:

          Section   Exercise of Warrant.
                    -------------------

          1A.   Exercise Period.   The Registered Holder may exercise, in whole
                ---------------
or in part (but not as to a fractional share of Warrant Stock), the purchase
rights represented by this Warrant at any time and from time to time after the
Date of Issuance to and including April 7, 2004 (the "Exercise Period").
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          1B.    Exercise Procedure.
                 ------------------

          (i)    This Warrant (or any portion hereof) shall be deemed to have
been exercised when the Company has received all of the following items (the
"Exercise Time"):

          (a)    a completed Exercise Agreement, as described in Section 1C
     below, executed by the Person exercising all or part of the purchase rights
     represented by this Warrant (the "Purchaser");

          (b)    this Warrant;

          (c)    if this Warrant is not registered in the name of the Purchaser,
     an Assignment or Assignments in the form set forth in Exhibit II hereto
                                                           ----------
     evidencing the assignment of this Warrant to the Purchaser, in which case
     the Registered Holder shall have complied with the provisions set forth in
     Section 5 hereof; and

          (d)    either (1) a check payable to the Company in an amount equal to
     the product of the Exercise Price multiplied by the number of shares of
     Warrant Stock being purchased upon such exercise (the "Aggregate Exercise
     Price"), (2) the surrender to the Company of debt or equity securities of
     the Company having a Market Price equal to the Aggregate Exercise Price of
     the Warrant Stock being purchased upon such exercise (provided that for
     purposes of this subparagraph, the Market Price of any note or other debt
     security or any preferred stock shall be deemed to be equal to the
     aggregate outstanding principal amount or liquidation value thereof plus
     all accrued and unpaid interest thereon or accrued or declared and unpaid
     dividends thereon) or (3) a written notice to the Company that the
     Purchaser is exercising the Warrant (or a portion thereof) by authorizing
     the Company to withhold from issuance a number of shares of Warrant Stock
     issuable upon such exercise of the Warrant which when multiplied by the
     Market Price of the Warrant Stock is equal to the Aggregate Exercise Price
     (and such withheld shares shall no longer be issuable under this Warrant).

          (ii)   Certificates for shares of Warrant Stock purchased upon
exercise of this Warrant shall be delivered by the Company to the Purchaser
within five business days after the date of the Exercise Time. Unless this
Warrant has expired or all of the purchase rights represented hereby have been
exercised, the Company shall prepare a new Warrant, substantially identical
hereto, representing the rights formerly represented by this Warrant which have
not expired or been exercised and shall, within such five-day period, deliver
such new Warrant to the Person designated for delivery in the Exercise
Agreement.

          (iii)  The Warrant Stock issuable upon the exercise of this Warrant
shall be deemed to have been issued to the Purchaser at the Exercise Time, and
the Purchaser shall be deemed for all purposes to have become the record holder
of such Warrant Stock at the Exercise Time.

          (iv)   The issuance of certificates for shares of Warrant Stock upon
exercise of this Warrant shall be made without charge to the Registered Holder
or the Purchaser for any issuance tax

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in respect thereof or other cost incurred by the Company in connection with such
exercise and the related issuance of shares of Warrant Stock. Each share of
Warrant Stock issuable upon exercise of this Warrant shall, upon payment of the
Exercise Price therefor, be fully paid and nonassessable and free from all liens
and charges with respect to the issuance thereof.

          (v)    The Company shall not close its books against the transfer of
this Warrant or of any share of Warrant Stock issued or issuable upon the
exercise of this Warrant in any manner which interferes with the timely exercise
of this Warrant. The Company shall from time to time take all such action as may
be necessary to assure that the par value per share of the unissued Warrant
Stock acquirable upon exercise of this Warrant is at all times equal to or less
than the Exercise Price then in effect.

          (vi)   The Company shall assist and cooperate with any Registered
Holder or Purchaser required to make any governmental filings or obtain any
governmental approvals prior to or in connection with any exercise of this
Warrant (including, without limitation, making any filings required to be made
by the Company).

          (vii)  Notwithstanding any other provision hereof, if an exercise of
any portion of this Warrant is to be made in connection with a registered public
offering or the sale of the Company, the exercise of any portion of this Warrant
may, at the election of the holder hereof, be conditioned upon the consummation
of the public offering or the sale of the Company in which case such exercise
shall not be deemed to be effective until the consummation of such transaction.

          (viii) The Company shall at all times reserve and keep available out
of its authorized but unissued shares of Warrant Stock solely for the purpose of
issuance upon the exercise of the Warrants, such number of shares of Warrant
Stock issuable upon the exercise of all outstanding Warrants. The Company shall
take all such actions as may be necessary to assure that all such shares of
Warrant Stock may be so issued without violation of any applicable law or
governmental regulation or any requirements of any domestic securities exchange
upon which shares of Warrant Stock may be listed (except for official notice of
issuance which shall be immediately delivered by the Company upon each such
issuance). The Company shall not take any action which would cause the number of
authorized but unissued shares of Warrant Stock to be less than the number of
such shares required to be reserved hereunder for issuance upon exercise of the
Warrants.

          (ix)   Upon any exercise of this Warrant, the Company may require
customary investment representations from the Registered Holder and the
Purchaser to assure that the issuance of the Warrant Stock hereunder shall not
require registration or qualification under the Securities Act or any state
securities laws.

          1C.    Exercise Agreement.  Upon any exercise of this Warrant, the
                 ------------------
Exercise Agreement shall be substantially in the form set forth in Exhibit I
                                                                   ---------
hereto, except that if the shares of Warrant Stock are not to be issued in the
name of the Person in whose name this Warrant is registered, the Exercise
Agreement shall also state the name of the Person to whom the certificates for
the shares of Warrant Stock are to be issued, and if the number of shares of
Warrant Stock to be issued does not include all the shares of Warrant Stock
purchasable hereunder, it shall also state the

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name of the Person to whom a new Warrant for the unexercised portion of the
rights hereunder is to be delivered. Such Exercise Agreement shall be dated the
actual date of execution thereof.

          1D.   Fractional Shares.  If a fractional share of Warrant Stock
                -----------------
would, but for the provisions of paragraph 1A, be issuable upon exercise of the
rights represented by this Warrant, the Company shall, within five business days
after the date of the Exercise Time, deliver to the Purchaser a check payable to
the Purchaser in lieu of such fractional share in an amount equal to the
difference between the Market Price of such fractional share as of the date of
the Exercise Time and the Exercise Price of such fractional share.

          Section 2.  Adjustment of Exercise Price and Number of Shares.  In
                      -------------------------------------------------
order to prevent dilution of the rights granted under this Warrant, the Exercise
Price shall be subject to adjustment from time to time as provided in this
Section 2, and the number of shares of Warrant Stock obtainable upon exercise of
this Warrant shall be subject to adjustment from time to time as provided in
this Section 2.

          2A.   Subdivision or Combination of Common Stock.  If the Company at
                ------------------------------------------
any time subdivides (by any stock split, stock dividend, recapitalization or
otherwise) one or more classes of its outstanding shares of Common Stock into a
greater number of shares, the Exercise Price in effect immediately prior to such
subdivision shall be proportionately reduced and the number of shares of Warrant
Stock obtainable upon exercise of this Warrant shall be proportionately
increased. If the Company at any time combines (by reverse stock split or
otherwise) one or more classes of its outstanding shares of Common Stock into a
smaller number of shares, the Exercise Price in effect immediately prior to such
combination shall be proportionately increased and the number of shares of
Warrant Stock obtainable upon exercise of this Warrant shall be proportionately
decreased.

          2B.   Reorganization, Reclassification, Consolidation, Merger or Sale.
                ---------------------------------------------------------------
Any recapitalization, reorganization, reclassification, consolidation, merger,
sale of all or substantially all of the Company's assets or other transaction,
which in each case is effected in such a way that the holders of Common Stock
are entitled to receive (either directly or upon subsequent liquidation) stock,
securities or assets with respect to or in exchange for Common Stock is referred
to herein as "Organic Change." Prior to the consummation of any Organic Change,
the Company shall make appropriate provision to insure that each of the
Registered Holders of the Warrants shall thereafter have the right to acquire
and receive, in lieu of or in addition to (as the case may be) the shares of
Warrant Stock immediately theretofore acquirable and receivable upon the
exercise of such holder's Warrant, such shares of stock, securities or assets as
may be issued or payable with respect to or in exchange for the number of shares
of Warrant Stock immediately theretofore acquirable and receivable upon exercise
of such holder's Warrant had such Organic Change not taken place. In any such
case, the Company shall make appropriate provision (as determined by its board
of directors) with respect to such holders' rights and interests to insure that
the provisions of this Section 2 and Section 3 hereof shall thereafter be
applicable to the Warrants. The Company shall not effect any such consolidation,
merger or sale, unless prior to the consummation thereof, the successor entity
(if other than the Company) resulting from consolidation or merger or the entity
purchasing such assets assumes by written instrument (in form and substance
satisfactory to the Registered Holders of Warrants representing a majority of
the Warrant Stock obtainable upon exercise of all of the

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Warrants then outstanding), the obligation to deliver to each such holder such
shares of stock, securities or assets as, in accordance with the foregoing
provisions, such holder may be entitled to acquire.

          2C.  Certain Events.  If any event occurs of the type contemplated by
               --------------
the provisions of this Section 2 but not expressly provided for by such
provisions, then the Company's board of directors may make an appropriate
adjustment in the Exercise Price and the number of shares of Warrant Stock
obtainable upon exercise of this Warrant.

          Section 3.  No Dividends or Other Rights.  This Warrant shall not
                      ----------------------------
entitle the holder thereof to any voting, dividend, liquidation, or other rights
of a stockholder prior to the Exercise Time.

          Section 4.  Definitions.  The following terms have meanings set forth
                      -----------
below:

          "Common Stock" means, collectively, the Company's Common Stock, par
           ------------
value $.0001 per share, and any capital stock of any class of the Company
hereafter authorized which is not limited to a fixed sum or percentage of par or
stated value in respect to the rights of the holders thereof to participate in
dividends or in the distribution of assets upon any liquidation, dissolution or
winding up of the Company.

          "Market Price" means as to any security the average of the closing
           ------------
prices of such security's sales on all domestic securities exchanges on which
such security may at the time be listed, or, if there have been no sales on any
such exchange on any day, the average of the highest bid and lowest asked prices
on all such exchanges at the end of such day, or, if on any day such security is
not so listed, the average of the representative bid and asked prices quoted in
the NASDAQ System as of 4:00 P.M., New York time, on such day, or, if on any day
such security is not quoted in the NASDAQ System, the average of the highest bid
and lowest asked prices on such day in the domestic over-the-counter market as
reported by the National Quotation Bureau, Incorporated, or any similar
successor organization, in each such case averaged over a period of 21 days
consisting of the day as of which "Market Price" is being determined and the 20
consecutive business days prior to such day; provided that if such security is
listed on any domestic securities exchange the term "business days" as used in
this sentence means business days on which such exchange is open for trading. If
at any time such security is not listed on any domestic securities exchange or
quoted in the NASDAQ System or the domestic over-the-counter market, the "Market
Price" shall be the fair value thereof determined by the Company's board of
directors.

          "Options" means any rights or options to subscribe for or purchase
           -------
Common Stock or securities convertible into Common Stock.

          "Person" means an individual, a partnership, a joint venture, a
           ------
corporation, a limited liability company, a trust, an unincorporated
organization and a government or any department or agency thereof.

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          "Warrant Stock" means the Company's Common Stock, par value $.0001 per
           -------------
share; provided that if there is a change such that the securities issuable upon
exercise of the Warrants are issued by an entity other than the Company or there
is a change in the type or class of securities so issuable, then the term
"Warrant Stock" shall mean one share of the security issuable upon exercise of
the Warrants if such security is issuable in shares, or shall mean the smallest
unit in which such security is issuable if such security is not issuable in
shares.

          Section 5.  Warrant Transferable.
                      --------------------

          5A.  Subject to the transfer conditions referred to in the legend
endorsed hereon and in this Section 5, this Warrant and all rights hereunder are
transferable, in whole or in part, without charge to the Registered Holder, upon
surrender of this Warrant with a properly executed Assignment (in the form of
Exhibit II hereto) at the principal office of the Company.
----------

          5B.  Restrictive Legend.  Each certificate representing (i) this
               ------------------
Warrant, (ii) the Warrant Stock, (iii) any other securities issued in respect of
the Warrant Stock or Warrant Stock issued upon conversion of the Common Stock
upon any stock split, stock dividend, recapitalization, merger, consolidation or
similar event, shall (unless otherwise permitted by the provisions of Section 5C
below, or unless such securities have been registered under the Securities Act
or sold under Rule 144) be stamped or otherwise imprinted with a legend
substantially in the form (in addition to any legend required under applicable
state securities laws) set forth on the first page of this Warrant.

          5C.    Restrictions on Transfer.  The holder of this Warrant and each
                 ------------------------
person to whom this Warrant is subsequently transferred represents and warrants
to the Company (by acceptance of such transfer) that it will not transfer the
Warrant (or securities issuable upon exercise hereof) unless a registration
statement under the Securities Act is in effect with respect to such securities
at the time of such transfer except pursuant to (i) an effective registration
statement under the Securities Act, (ii) Rule 144 under the Securities Act (or
any other rule under the Securities Act relating to the disposition of
securities), or (iii) an opinion of counsel, reasonably satisfactory to counsel
for the Company, that an exemption from such registration is available.

          Section 6.  Warrant Exchangeable for Different Denominations.  This
                      ------------------------------------------------
Warrant is exchangeable, upon the surrender hereof by the Registered Holder at
the principal office of the Company, for new Warrants of like tenor representing
in the aggregate the purchase rights hereunder, and each of such new Warrants
shall represent such portion of such rights as is designated by the Registered
Holder at the time of such surrender.  The date the Company initially issues
this Warrant shall be deemed to be the "Date of Issuance" hereof regardless of
the number of times new certificates representing the unexpired and unexercised
rights formerly represented by this Warrant shall be issued.  All Warrants
representing portions of the rights hereunder are referred to herein as the
"Warrants."

          Section 7.  Registration Rights
                      -------------------

          7A.  Certain Definitions.  As used in this Section 7, the following
               -------------------
terms shall have the following meanings:

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               "Commission" shall mean the Securities and Exchange Commission or
                ----------
any other federal agency at the time administering the Securities Act.

               The terms "controls" and "controlling" have the meaning within
                          --------       -----------
the Securities Act and the rules and regulations thereunder.

               "Holder" shall mean any holder of Warrants or of Registrable
                ------
Securities as hereinafter defined.

               The terms "register" and "registration" shall refer to a
                          --------       ------------
registration effected by preparing and filing a registration statement in
compliance with the Securities Act and applicable rules and regulations
thereunder, and the declaration or ordering of the effectiveness of such
registration statement.

               "Registrable Securities" shall mean (i) shares of Common Stock
                ----------------------
issued or issuable upon exercise of the Warrants and (ii) any Common Stock
issued in respect of such securities upon any stock split, stock dividend,
recapitalization or similar event.

               "Registration Expenses" shall mean all expenses incurred by the
                ---------------------
Company in compliance with Section 7B hereof, including, without limitation, all
registration and filing fees, printing expenses, reasonable fees and
disbursements of counsel for the Company, blue sky fees and expenses, and the
expense of any special audits incident to or required by any such registration
(but excluding the compensation of regular employees of the Company and expenses
of regular annual and periodic audits, which shall be paid in any event by the
Company) and the expenses associated with the Company's obligations under
Section 7D hereof.

               "Restricted Securities" shall refer collectively to the
                ---------------------
securities of the Company required to bear the legend referred to in Section 5B
hereof.

               "Securities Act" shall mean the Securities Act of 1933, as
                --------------
amended, or any similar federal statute and the rules and regulation of the
Commission thereunder, all as the same shall be in effect at the time.

               "Selling Expenses" shall mean all underwriting discounts and
                ----------------
selling commissions applicable to the sale of Registrable Securities and all
reasonable fees and disbursements of counsel for any Holder.

          7B.  Piggyback Registration Rights.
               -----------------------------

     (a)  If the Company shall determine to register any of its securities under
the Securities Act either for its own account or the account of any security
holder or holders, other than a registration relating solely to employee
benefits plans or corporate reorganizations or other transactions under Rule 145
of the Securities Act, the Company will:

          (i)  Promptly give to each Holder written notice thereof; and

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          (ii) Except as set forth in Section 7B(b), include in such
registration (and any related qualification under state blue sky laws and other
compliance filings, and in any underwriting involved therein) all the
Registrable Securities specified in a written request or requests received by
the Company from a Holder within 15 days after the written notice from the
Company is given.

     (b)  If the registration of which the Company gives notice is for a
registered public offering involving an underwriting, the Company shall so
advise the Holders as part of the written notice given pursuant to Section
7B(a)(i). In such event the right of any Holder to registration pursuant to
Section 7B shall be conditioned upon such Holder's participation in such
underwriting and the inclusion of such Holder's Registrable Securities in the
underwriting to the extent provided herein. All Holders proposing to distribute
their securities through such underwriting shall (together with the Company and
the other persons distributing their securities through such underwriting) enter
into an underwriting agreement in customary form with the underwriter or
underwriters selected or approved for underwriting by the Company.
Notwithstanding any other provision of this Section 7B, if the underwriter
determines that marketing factors require a limitation on the number of shares
that may be included in the offering, the underwriter may (subject to the
allocation priority set forth below) exclude from such registration and
underwriting some or all of the Registrable Securities which would otherwise be
underwritten pursuant hereto. The Company shall so advise all Holders of
securities requesting registration, and the number of shares of securities that
are entitled to be included in the registration and underwriting shall be
reduced in the following manner: (i) if such registration is being made in
respect of a sale for the account of the Company, pro rata among the requesting
Holders and all other security holders based upon the number of securities
requested to be registered by such Holders and other security holders and (ii)
if such registration is being made in respect of a sale for the account of other
security holders, first, pro rata among all Holders and other security holders
(other than those security holders on account of whom such registration is being
made) based upon the number of securities requested to be registered by them,
second, by any shares proposed to be registered by the Company and third, pro
rata among all security holders on account of whom such registration is being
made. Notwithstanding the foregoing provisions, the Company may withdraw any
registration statement referred to in this Section 7 without thereby incurring
any liability to the Holders of Registrable Securities. If any Holder of
Registrable Securities or any officer, director or other security holder
requesting registration disapproves of the terms of any such underwriting, such
person may elect to withdraw therefrom by written notice to the Company and the
underwriter. Any Registrable Securities or other securities excluded or
withdrawn from such underwriting shall be withdrawn from such registration.

          7C.  Expenses of Registration.  All Registration Expenses incurred  on
               ------------------------
behalf of the Holders in connection with any registration, qualification or
compliance pursuant to this Section 7 shall be borne by the Company, and all
Selling Expenses shall be borne by the Holders of the securities so registered
pro rata on the basis of the number of their shares so registered.

          7D.  Registration Procedures.  In the case of each registration
               -----------------------
effected by the Company pursuant to this Section 7, the Company will advise each
Holder in writing as to the initiation of each registration and as to the
completion thereof. The Company will:

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          (a)  Use its best efforts to keep such registration effective for a
     period of 120 days or until the Holder or Holders have completed the
     distribution described in the registration statement relating thereto,
     whichever first occurs; and

          (b)  Furnish such number of prospectuses and other documents incident
     thereto as a Holder from time to time may reasonably request.

          7E.  Indemnification.
               ---------------

          (a)  The Company will indemnify each Holder, each of its officers,
     directors and partners, and each person controlling such Holder with
     respect to which registration, qualification or compliance has been
     effected pursuant to this Section 7, and each underwriter, if any, and each
     person who controls any underwriter, against all claims, losses, damages
     and liabilities (or actions in respect thereof) arising out of or based on
     (i) any untrue statement (or alleged untrue statement) of a material fact
     contained in any prospectus, offering circular or other document (including
     any related registration statement or notification) incident to any such
     registration, qualification or compliance, or based on any omission (or
     alleged omission) to state therein a material fact required to be stated
     therein or necessary to make the statements therein not misleading, or (ii)
     any violation by the Company of the Securities Act or any rule or
     regulation thereunder applicable to the Company and relating to action or
     inaction required of the Company in connection with any such registration,
     qualification or compliance, and the Company will reimburse each such
     Holder, each of its officers, directors and partners, and each person
     controlling such Holder, each such underwriter and each person who controls
     any such underwriter, for any legal and any other expenses reasonably
     incurred in connection with investigating and defending any such claim,
     loss, damage, liability or action; provided, however, that the Company will
     not be liable in any such case to the extent that any such claim, loss,
     damage, liability or expense arises out of or is based on (x) any true
     statement or omission based upon written information furnished to the
     Company by such Holder or underwriter and stated to be specifically for use
     therein or (y) any failure by any such Holder or underwriter to comply with
     the prospectus delivery requirements of the Securities Act.

          (b)  Each Holder and other security holder will, if Registrable
     Securities held by it are included in the securities as to which such
     registration, qualification or compliance is being effected, indemnify the
     Company, each of its directors and officers and each underwriter, if any,
     of the Company's securities covered by such a registration statement, each
     person who controls the Company or such underwriter, each other such Holder
     and other security holder and each of their officers, directors and
     partners, and each person controlling such Holder or other security holder,
     against all claims, losses, damages and liabilities (or actions in respect
     thereof) arising out of or based on any untrue statement (or alleged untrue
     statement) of a material fact contained in any such registration statement,
     prospectus, offering circular or other document (including any related
     registration statement or notification), or any omission (or alleged
     omission) to state therein a material fact necessary to make the statements
     made therein not misleading. Each Holder and other security holder will, if
     Registrable Securities held by him are included in the securities as to

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     which such registration, qualification or compliance is being affected,
     reimburse the Company and such Holders, other security holders, directors,
     officers, partners, persons, underwriters or control persons for any legal
     or any other expenses reasonably incurred in connection with investigation
     and defending any such claim, loss, damage, liability or action.  The
     obligation to indemnify and reimburse assumed under this Section 7E(b)
     shall be limited to an untrue statement (or alleged untrue statement) or
     omission (or alleged omission) made in such registration statement,
     prospectus, offering circular or other document in reliance upon and in
     conformity with written information furnished to the Company by such Holder
     or other security holder (as the case may be) and stated to be specifically
     for use therein; provided, however, that the obligations of such Holders
                      --------  -------
     and other security holders hereunder shall be limited to an amount equal to
     the proceeds to each such Holder or other security holder (as the case may
     be) of securities sold as contemplated herein.

          (c) Each party entitled to indemnification under this Section 7E (the
     "Indemnified Party") shall give notice to the party required to provide
     indemnification (the "Indemnifying Party") promptly after such Indemnified
     Party has actual knowledge of any claim as to which indemnity may be
     sought, and shall permit the Indemnifying Party to assume the defense of
     any such claim or any litigation resulting therefrom, provided that counsel
     for the Indemnifying Party, who shall conduct the defense of such claim or
     any litigation resulting therefrom, shall be approved by the Indemnified
     Party (whose approval shall not unreasonably be withheld), and the
     Indemnified Party may participate in such defense at such party's expense,
     and provided further that the failure of any Indemnified Party to give
     notice as provided herein shall not relieve the Indemnifying Party of its
     obligations under this Section 7E, except to the extent that the
     Indemnifying Party is actually prejudiced by such failure to give notice.
     No Indemnified Party, in the defense of any such claim of litigation,
     shall, except with the consent of each Indemnified Party, consent to entry
     of any judgment or enter into any settlement which does not include as an
     unconditional term thereof the giving by the claimant or plaintiff to such
     Indemnified Party of a release from all liability in respect to such claim
     or litigation and, if such defense is assumed by the Indemnifying Party,
     the Indemnifying Party will not be subject to any liability for any
     settlement made by the  Indemnified Party without the consent of the
     Indemnifying Party (such consent not to be unreasonably withheld).

          7F.  Information by Holder.  Each Holder of Registrable Securities,
               ---------------------
and each person holding securities included in any registration, shall furnish
to the Company in writing such information regarding such Holder or other person
as the Company may reasonably request in writing and as shall be reasonably
required in connection with any registration, qualification or compliance
referred to in this Section 7.

          7G.  Limitations on Registration of Issues of Securities. From and
               ---------------------------------------------------
after the Date of Issuance of this Warrant, the Company shall not enter into any
agreement with any holder or prospective holder of any securities of the Company
giving such holder or prospective holder the right to require the Company to
register any securities of the Company unless such agreement specifically
provides that, in the case of any registration initiated by such holders, the
Holders shall

                                       10
<PAGE>

have the right to participate in such registration to the extent and in the
manner specified in Section 7B hereof.

          7H.  Rule 144 Reporting.  With a view of making available the benefits
               ------------------
of certain rules and regulations of the Commission which may permit the sale of
the Restricted Securities to the public without registration, the Company agrees
to:

          (a)  Use its best efforts to make and keep public information
     available as those terms are understood and defined in Rule 144 under the
     Securities Act, at all times from and after 90 days following the effective
     date of the first registration under the Securities Act filed by the
     Company for an offering of its securities to the general public;

          (b)  Use its best efforts to file with the Commission in a timely
     manner all reports and other documents required of the Company under the
     Securities Act and the Securities Exchange Act of 1934, as amended (the
     "Exchange Act") at any time during which it is subject to such reporting
     requirements; and

          (c)  So long as a Holder owns any Restricted Securities, furnish to
     the Holder forthwith upon written request a written statement by the
     Company as to its compliance with the reporting requirements of Rule 144
     (at any time from and after 90 days following the effective date of the
     first registration statement filed by the Company for an offering of its
     securities to the general public), and of the Securities Act and the
     Exchange Act (at any time during which it is subject to such reporting
     requirements), a copy of the most recent annual or quarterly report of the
     Company, and such other reports and documents so filed as a Holder may
     reasonably request in availing itself of any rule or regulation of the
     Commission allowing a Holder to sell any such securities without
     registration.

          7I.  Transfer of Registration Rights.  The rights to cause the Company
               -------------------------------
to register securities granted by the Company under Section 7B may be assigned
by any Holder to transferees or assignees of Restricted Securities who, after
such assignment or transfer, hold at least 10% of such Holder's Restricted
Securities; provided, however, that the Company is given written notice at the
            --------  -------
time of or within a reasonable time after said transfer, stating the name and
address of said transferees or assignees and identifying the securities with
respect to which such registration rights are being assigned; and, provided,
                                                                   --------
further, that the transferees or assignees of such rights assume the obligations
-------
of such Holder under this Section 7 and that the Company shall have the right to
require such transferee or assignee to execute a counterpart of this Warrant as
a condition to such transferee's or assignee's claim to any rights hereunder.
The foregoing requirement as to the minimum percentage of shares to be
transferred or assigned in connection with any assignment of registration rights
shall not apply to an assignment by a Holder to any person or entity which is
affiliated with such Holder.

          7J.  "Market Stand-Off" Agreement. Each Holder agrees, if requested by
                ---------------------------
the Company and the underwriter of Common Stock (or other securities) of the
Company, not to sell or otherwise transfer or dispose of any Registrable
Securities without the prior written consent of the Company or such underwriter,
for a specified period of time (not to exceed 180 days) following the

                                       11
<PAGE>

effective date of any registration statement of the Company filed under the
Securities Act with respect to any underwritten public offering of securities of
the Company, as provided in Section 7B hereof, provided that:

          (a)  all Holders, other security holders whose securities are included
     in such registration statement and officers and directors of the Company
     shall also enter into similar agreements, except as provided in Section
     7B(b); and

          (b)  such agreement shall be in writing in a form satisfactory to the
     Company and such underwriter.

          7K.  Termination of Registration Rights.  The right to cause the
               ----------------------------------
Company to register securities granted by the Company under Section 7B shall
terminate with respect to any Holder at such time as all of the Registrable
Securities of such Holder can be sold within a given three-month period in
accordance with Rule 144 of the Commission provided, however, that,
notwithstanding the foregoing, the registration rights provided in Section 7B
shall terminate on the fifth anniversary of the Date of Issuance.

          Section 8.  Replacement.  Upon receipt of evidence reasonably
                      -----------
satisfactory to the Company (an affidavit of the Registered Holder shall be
satisfactory) of the ownership and the loss, theft, destruction or mutilation of
any certificate evidencing this Warrant, and in the case of any such loss, theft
or destruction, upon receipt of indemnity reasonably satisfactory to the
Company, or, in the case of any such mutilation upon surrender of such
certificate, the Company shall execute and deliver in lieu of such certificate a
new certificate of like kind representing the same rights represented by such
lost, stolen, destroyed or mutilated certificate and dated the date of such
lost, stolen, destroyed or mutilated certificate.

          Section 9.  Notices.  Except as otherwise expressly provided herein,
                      -------
all notices referred to in this Warrant shall be in writing and shall be
delivered personally, sent by reputable overnight courier service (charges
prepaid) or sent by registered or certified mail, return receipt requested,
postage prepaid and shall be deemed to have been given when so delivered, sent
or three days after deposited in the U. S. Mail (i) to the Company, at its
principal executive offices and (ii) to the Registered Holder of this Warrant,
at such holder's address as it appears in the records of the Company (unless
otherwise indicated by any such holder).

          Section 10. Amendment and Waiver.  Except as otherwise provided
                      --------------------
herein, the provisions of the Warrants may be amended and the Company may take
any action herein prohibited, or omit to perform any act herein required to be
performed by it, only if the Company has obtained the written consent of the
Registered Holders of Warrants representing a majority of the shares of Warrant
Stock obtainable upon exercise of the Warrants; provided that no such action may
change the Exercise Price of the Warrants or the number of shares or class of
stock obtainable upon exercise of each Warrant without the written consent of
the Registered Holders of Warrants representing at least 80% of the shares of
Warrant Stock obtainable upon exercise of the Warrants.

                                       12
<PAGE>

          Section 11.  Descriptive Headings; Governing Law.  The descriptive
                       -----------------------------------
headings of the several Sections and paragraphs of this Warrant are inserted for
convenience only and do not constitute a part of this Warrant.  The corporation
laws of the State of Delaware shall govern all issues concerning the relative
rights of the Company and its stockholders.  All other questions concerning the
construction, validity, enforcement and interpretation of this Warrant shall be
governed by the internal law of the State of Delaware, without giving effect to
any choice of law or conflict of law provision or rule (whether of the State of
Delaware or any other jurisdictions) that would cause the application of the
laws of any jurisdictions other than the State of Delaware.

                              *     *     *     *

                                       13
<PAGE>

          IN WITNESS WHEREOF, the Company has caused this Warrant to be signed
and attested by its duly authorized officers under its corporate seal and to be
dated the Date of Issuance hereof.

                                NET-tel Communications, Inc.

                                By /s/ James F. Kenefick
                                   ---------------------

                                Its President
                                    ---------

[Corporate Seal]

Attest:

/s/ Thomas Lera
---------------
     Secretary

                                       14
<PAGE>

                                                                       EXHIBIT I

                              EXERCISE AGREEMENT
                              ------------------

To:                                 Dated:

          The undersigned, pursuant to the provisions set forth in the attached
Warrant (Certificate No. W-3), hereby agrees to subscribe for the purchase of
______ shares of the Warrant Stock covered by such Warrant and makes payment
herewith in full therefor at the price per share provided by such Warrant.

                                Signature ____________________

                                Address ______________________

                                                                      EXHIBIT II

                                  ASSIGNMENT
                                  ----------

          FOR VALUE RECEIVED, _________________________________ hereby sells,
assigns and transfers all of the rights of the undersigned under the attached
Warrant (Certificate No. W-3) with respect to the number of shares of the
Warrant Stock covered thereby set forth below, unto:

Name of Assignee           Address                   No. of Shares
----------------           -------                   -------------

Dated:                          Signature  _______________________

                                           _______________________

                                Witness    _______________________

                                       15

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