Document:

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                                                                     Exhibit 4.5

          The security represented by this certificate was originally issued on
          April 30, 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 30, 1999                             Certificate No. W-6

          FOR VALUE RECEIVED, NET-tel Communications, Inc., a  Delaware
corporation (the "Company"), hereby grants to Tom Marino dba Tandem Associates,
28220 Franklin Road, Southfield Michigan 48034, or its registered assigns (the
"Registered Holder") the right to purchase from the Company 4,500 shares of
Warrant Stock at a price per share of $9.49 (as adjusted from time to time
hereunder, the "Exercise Price") as provided herein. 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 1.  Exercise of Warrant.
                      -------------------

          1A.  Exercise Period.  The purchase rights provided for in this
               ---------------
Warrant are subject to the following vesting requirements: 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 thereafter to and including April 30, 2002 (the "Exercise Period").

          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"):
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          (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 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.

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          (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 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 Pur-

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chaser 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 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

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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.

          "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.

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          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:

               "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.

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               "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

          (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.

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     (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:

          (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

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          (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
     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.

                                       9
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     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 have the right to participate in such registration to the extent
and in the manner specified in Section 7B hereof.

                                       10
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          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 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:

                                       11
<PAGE>

          (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.

          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

                                       12
<PAGE>

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]                Received by Tom Marino

Attest:                         /s/ Tom Marino
                                --------------

/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-6), 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-6) 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<PAGE>

                                                                     Exhibit 4.6

THE SECURITIES REPRESENTED HEREBY HAVE BEEN ACQUIRED IN A TRANSACTION NOT
INVOLVING ANY PUBLIC OFFERING AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES
ACT OF 1933 OR THE SECURITIES LAWS OF ANY STATE.  SUCH SECURITIES MAY NOT BE
SOLD OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION
THEREFROM UNDER SUCH ACT AND LAWS.  THIS WARRANT AND THE SHARES ISSUABLE
HEREUNDER ARE SUBJECT TO CERTAIN TRANSFER AND OTHER RESTRICTIONS SET OUT IN A
CERTAIN INVESTOR RIGHTS AGREEMENT DATED JULY 23,1999.

                          NET-tel Communications, Inc.
                                Washington, D.C.

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

                             STOCK PURCHASE WARRANT

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

                                 August 2, 1999

1.   Grant.  NET-tel Communications, Inc. a Delaware corporation (hereinafter,
the Company), for value received hereby grants to Allied Capital Corporation, a
Maryland corporation or its registered assigns (hereinafter, Holder), or its
nominee, under the terms herein, the right to purchase 474,159.68 of the fully
paid and non-assessable shares of the Company's authorized but unissued $0.0001
par value common stock.  The $0.0001 par value common shares of the Company are
sometimes hereinafter referred to as Common Stock. The Common Stock shares
issuable under this Warrant are sometimes hereinafter referred to as the Warrant
Shares. The number of Warrant Shares stated above is subject to certain
antidilution and other adjustments as set out below. Such number, as it may be
adjusted from time-to-time, is hereinafter referred to as the Warrant Number.

2.   Warrant Purchase Agreement.  This Warrant has been issued under the terms
of a Common Stock Warrant Purchase Agreement among the Company, the Holder and
certain other parties, dated this date (the Warrant Purchase Agreement);
capitalized terms not otherwise defined herein shall have the meanings set forth
in the Warrant Purchase Agreement. This Warrant evidences the obligation of the
Company to issue shares of its capital stock, in the aggregate, corresponding to
One and Eight-Tenths percent (1.8%) of such stock, calculated on a Fully-Diluted
Basis as of Closing. The Holder is entitled to the benefits of the Warrant
Purchase Agreement and all of the exhibits thereto, and reference is made
thereto for a description of the rights and remedies thereunder.

3.   Term.  The right to exercise this Warrant shall expire seven (7) years
after the date hereof.
<PAGE>

4.   Exercise Price.  The exercise price of this Warrant (the Exercise Price)
shall be $100, expressed for the entire Warrant, not on a per-share basis.

5.   Anti-dilution and Other Adjustments.

     (a) Issuance of Additional Stock; Increase in Warrant Number.  If the
Company at any time after the date hereof shall issue or be deemed to have
issued any Additional Stock for a per-share consideration less than the Base
Price in effect immediately prior to such issuance or deemed issuance, the
Warrant Number after such issuance shall increase to equal the number determined
by multiplying the Warrant Number in effect immediately prior to such issuance
by a fraction, (i) the denominator of which shall be the number of shares of
Common Stock issued and outstanding (or deemed issued) on a Fully Diluted Basis
immediately prior to such issuance plus the number of shares of Common Stock
which the aggregate consideration received by the Company for such Additional
Stock would purchase at the Base Price immediately prior to such issuance, and
(ii) the numerator of which shall be the number of shares of Common Stock issued
and outstanding (or deemed issued) on a Fully Diluted Basis immediately after
such issuance; provided, however, that the Warrant Number shall not increase in
the event of any issuance of Additional Stock that is either Employee Stock or
Excluded Stock as defined in this sub-paragraph. Employee Stock shall mean
                                                 --------------
Common Stock, and/or options, warrants or other rights to purchase Common Stock,
(i) issued or granted to officers, directors, employees or agents of the Company
or any subsidiary of the Company pursuant to any employee stock option plan or
arrangement, employee stock purchase plan or arrangement, or other equity
incentive, bonus, or similar plan or arrangement approved by the board of
directors of the Company (the Board of Directors), provided the total does not
exceed twenty percent (20%) of the shares of Common Stock then outstanding
and/or issuable upon conversion of the outstanding convertible securities,
options, warrants or other rights to acquire Common Stock (the Fully Diluted
Common Stock); (ii) issued or granted pursuant to written agreements with
"branchisees" or similar agreements with "branchisees" or similar agents of the
Company or any subsidiary, provided that any options, warrants or other rights
granted thereunder with respect to Common Stock shall be exercisable at not less
than fair market value (as determined by the Board of Directors) as of the date
of grant; and provided further, that the total shares of Common Stock issuable
              ----------------
upon the exercise of all such options, warrants or other rights shall not exceed
five percent (5%) of the Fully Diluted Common Stock as of any such grant date;
or (iii) approved by the holders of at least 66 2/3% of the shares of Series B
preferred stock of the Company (the Series B Stock) then outstanding, voting
separately as a class. Excluded Stock shall mean (i) Common Stock issuable upon
                       --------------
conversion of shares of Series B Stock which were issued for a consideration of
$7,730 or more per Series B Stock share, (ii) Employee Stock, or (iii) Common
Stock issuable upon the exercise of this Warrant.

     (b) Decrease in Base Price.  The Base Price shall initially be $7.73 per
share. Whenever the Warrant Number increases according to sub-paragraph (a)
above, the Base Price shall thereupon decline according to the following
equation:

                                       2
<PAGE>

                                X = (AP + C) / B
wherein

X = the Base Price to be in effect immediately after the subject issuance or
sale;

A = the number of shares of Common Stock issued and outstanding (or deemed to be
issued) on a Fully Diluted Basis immediately before such issuance or sale;

B = the number of shares of Common Stock issued and outstanding (or deemed to be
issued) on a Fully Diluted Basis immediately after such issuance or sale;

P = the Base Price as in effect immediately prior to such issuance or sale; and

C = the net consideration received for such issuance or sale.

     (c) Options and Warrants.  If the Company shall at any time other than
pursuant to this Warrant or with respect to Employee Stock or Excluded Stock,
issue or grant any options or rights to subscribe for or to purchase Common
Stock, all shares of Common Stock which the holders of such options or rights
shall be entitled to subscribe for or to purchase thereunder shall be deemed to
be issued as of the date of the issuing or granting of such options or rights;
and the minimum aggregate consideration specified in such options or rights for
the shares covered thereby, plus the cash consideration, if any, received by the
Company for the issuance of such options or rights, shall be deemed to be the
consideration actually received by the Company for the issuance of such shares;
except as may be provided in subparagraph (n) below, no further adjustments to
the Warrant Number or the Base Price shall be made upon the actual issuance of
Common Stock upon exercise of such options or rights;

     (d) Convertible Securities.  If the Company shall at any time other than
pursuant to this Warrant or with respect to Employee Stock or Excluded Stock,
issue any stock or obligations directly or indirectly convertible into or
exchangeable for Common Stock, then such issuance shall be deemed to be an
issuance (as of the date of issue of such stock or obligations) of the total
maximum number of shares of Common Stock necessary to effect the exchange or
conversion of all such stock or obligations. The amount received or receivable
by the Company in consideration for the issuance of such stock or obligations
(deducting therefrom any commissions or expenses paid or incurred by the Company
for any underwriting of, or otherwise in connection with, such issuance), plus
the minimum aggregate amount of premiums, if any, payable to the Company upon
exchange or conversion, shall be deemed to be the consideration actually
received by the Company for such Common Stock; except as may be provided in
subparagraph (n) below, no further adjustments to the Warrant Number or the Base
Price shall be made upon the actual issuance of Common Stock upon the conversion
or exchange of such stock or obligations;

     (e) Calculation of Consideration.  In the case of an issuance of Common
Stock for cash, the consideration received by the Company therefor shall be
deemed to be the net proceeds received for such shares, deducting therefrom any
commissions or expenses paid or incurred by

                                       3
<PAGE>

the Company for any underwriting of, or otherwise in connection with, the issue
of such shares; provided, however, that in any such case where the shares of
                -----------------
Common Stock so issued are part of a unit or combination of securities of the
Company consisting of one or more shares of Common Stock and other securities of
the Company, if the amount of the cash consideration received by the Company for
the Stock so issued is not deterrminable at the time of such issuance, such
amount shall be deemed to be such portion of the total cash consideration
received by the Company for such units or combinations as reasonably determined
in good faith by the Company's Board of Directors, regardless of the accounting
treatment thereof by the Company;

     (f) Non-Cash Consideration.  In the case of an issuance (other than as a
dividend or other distribution on any Common Stock or upon conversion or
exchange of other securities of the Company) of shares of Additional Stock for a
consideration part or all of which shall be other than cash, the amount of such
consideration other than cash shall for purposes of this Warrant be the fair
market value of such consideration as reasonably determined in good faith by the
Company's Board of Directors regardless of the accounting treatment thereof by
the Company;

     (g) Resale of Treasury Stock.  The sale or other disposition of any shares
of Common Stock of the Company or other securities held in the treasury of the
Company today, or of any securities resulting from any reclassification or
reclassifications of such shares or other securities which were effected while
they were held in the treasury of the Company, shall be deemed an issuance
thereof; provided, however, that if any such share or other security is sold or
disposed of and subsequently re-acquired by the Company, no future sale or other
disposition thereof shall be deemed an issuance thereof.

     (h) Stock Split or Dividend.  In case the shares of Common Stock at any
time outstanding shall be subdivided into a greater or combined into a lesser
number of shares of Common Stock, by stock-split, reverse split or otherwise, or
in case shares of Common Stock shall be issued as a stock dividend, the Warrant
Number and the Base Price, shall be increased or decreased, as applicable, to
amounts which shall bear the same relation to the Warrant Number and the Base
Price in effect immediately prior to such subdivision, combination or stock
dividend as the total number of shares of Common Stock issued and outstanding
(or deemed issued) immediately prior to such subdivision, combination or stock
dividend shall bear to the total number of shares of Common Stock issued and
outstanding (or deemed issued) immediately after such subdivision, combination
or stock dividend; an adjustment pursuant to this subparagraph shall become
effective immediately after the effective date of such subdivision, combination
or stock dividend, retroactive to the record date (if any) for such subdivision,
combination or stock dividend;

     (i) Adjustment for initial Errors.  The Warrant Number specified in
paragraph 1 above was calculated upon the Company's representation of the amount
of outstanding Common Stock on a Fully Diluted Basis as of Closing and with the
intention that the full exercise of this Warrant will result in the holders
thereof obtaining Common Stock constituting a certain percentage of the
Company's equity securities, calculated on such basis. If for any reason it
shall hereafter be determined that such representation is incorrect and the
actual amount of such Common Stock corresponding to such percentage is greater
than as specified in paragraph 1, then

                                       4
<PAGE>

the Company or the Holder (whichever shall discover such error) shall notify the
other of such determination and the Company shall forthwith reissue this
Warrant, with an appropriate proportional adjustment in the Warrant Number to be
effective from the date hereof.

     (j) Merger.  In case of any capital reorganization, or any reclassification
of the Common Stock of the Company, or in case of any consolidation of the
Company with or the merger of the Company into any other entity (other than a
consolidation or merger in which the Company is the surviving entity), this
Warrant shall after such reorganization, reclassification, consolidation or
merger be exercisable upon the terms and conditions specified herein, for the
number of shares of stock or other securities or property of the Company, or of
the other entity resulting from such consolidation or surviving such merger (as
the case may be), which the holder of this Warrant would have been entitled to
receive, under the terms of such reorganization, reclassification, consolidation
or merger, if this Warrant had been exercised in full prior to such
reorganization, reclassification, consolidation or merger. In any such case, if
necessary, the provision set forth in this Warrant with respect to the rights
and interests thereafter of the Holder shall be appropriately adjusted so as to
be applicable, as nearly as may reasonably be, to any shares of stock or other
securities or property thereafter deliverable on the exercise of this Warrant.
The subdivision or combination of shares of Common Stock at any time outstanding
into a greater or lesser number of shares of Common Stock shall not be deemed to
be a reclassification of the Common Stock of the Company for the purposes of
this subparagraph. The Company shall not effect any such consolidation or merger
unless, prior to or simultaneously with the consummation thereof, the surviving
entity (if other than the Company) resulting from such consolidation or merger
shall assume, by written agreement executed and delivered to the Company, the
obligation to deliver to the Holder such shares of stock, securities or assets
to which in accordance with the foregoing provisions, such Holder may be
entitled, as well as any other obligations arising under this Warrant;

     (k) Dividends in Kind.  If the Company shall declare a dividend upon Common
Stock payable other than from earnings or earned surplus or other than in shares
of Common Stock or stock or obligations directly or indirectly convertible into
or exchangeable for Common Stock, the holder of this Warrant shall, upon
exercise hereof in whole or in part, be entitled, in addition to the shares of
Common Stock deliverable upon such exercise, to the cash, stock or other
securities or property which Holder would have received as dividends if
continuously since the date hereof such Holder

          (i) had been the holder of record of the Common Stock deliverable upon
such exercise, and

          (ii) had retained all dividends in stock or other securities (other
than shares of Common Stock or such convertible or exchangeable stock or
obligations) paid or payable in respect of such Common Stock or in respect of
any such stock or other securities so paid or payable as such dividends.

For purposes of this subparagraph, a dividend payable other than in cash shall
be considered to be payable from earnings or earned

                                       5
<PAGE>

surplus only to the extent that such earnings or earned surplus shall be charged
in an amount equal to the fair value of such dividend as determined in good
faith by the Board of Directors of the Company;

     (l) Adjustments to Numbers of Other Securities.  If as a result of any
provision of this paragraph 5 the Holder shall become entitled to acquire any
securities of the Company other than or in addition to Common Stock, the number
or amount of such other securities to which the Holder is entitled shall be
subject to adjustment from time to time in a manner and on terms as nearly
equivalent as practicable to the provisions applicable to the Warrant Number,
and the provisions of this paragraph with respect thereto shall apply as nearly
as may be practicable to such other securities.

     (m) De Minimis.  Anything in this paragraph to the contrary
notwithstanding, no adjustment shall be made hereunder in any case where the
increase in the Warrant Number would be less than one (1) share of Common Stock;
but in such case any adjustment that would otherwise be made shall be delayed
and the adjustment shall be made only after the next issuance or deemed issuance
of Additional Stock which, together with any and all such issuances, shall
entitle Holder to receive at least one (1) whole additional share of such stock;

     (n) Changes to Options and Convertible Securities.  Upon any change to the
consideration specified in any option or night described in subparagraph (c),
above for the Common Stock issuable thereunder, or to the rate of conversion or
exchange specified in any stock or obligation described in subparagraph (d)
above, in any case where the issuance or grant thereof had previously been the
basis for an adjustment of the Warrant Number and the Base Price, the Warrant
Number and the Base Price then in effect shall forthwith be readjusted to the
Warrant Number and the Base Price which would have been in effect if the
adjustments made upon the original issuance or grant thereof had been made on
the basis of such consideration or rate as so changed. Upon the exercise of
options or rights described in subparagraph (c) hereof, in any case where the
issuance or grant thereof had previously been the basis for an adjustment of the
Warrant Number and the Base Price, if the actual aggregate consideration
received for the shares covered thereby is greater than the minimum
consideration which was deemed to have been received according to such
subparagraph, the Warrant Number and the Base Price in effect at the time of
such exercise shall forthwith be readjusted to the Warrant Number and the Base
Price which would have been in effect if the adjustment made upon the issuance
or grant thereof had been made on the basis of such consideration actually
received. Likewise, upon the conversion or exchange of stock or obligations
described in subparagraph (d), above, in any case where the issuance thereof had
previously been the basis for an adjustment of the Warrant Number and the Base
Price, if the actual number of shares of Common Stock issued upon such
conversion or exchange shall be less than the maximum number deemed, according
to such subparagraph, to have been issued, or if the actual aggregate premium
paid to the Company upon such conversion or exchange shall be greater than the
minimum premium deemed (according to such subparagraph,) to have been paid, the
Warrant Number and the Base Price in effect at the time of such conversion or
exchange shall forthwith be readjusted to the Warrant Number and the Base Price
which would have been in effect if the adjustment on the original issuance
thereof had been made on the basis of the actual number of shares issued or, (as
the case may be) the actual premium paid.

                                       6
<PAGE>

     (o)  Expiration of Options; Retirement of Convertible Securities.  Upon the
expiration or lapse of options or rights described in subparagraph (c) above in
any case where the issuance or grant thereof had previously been the basis for
an adjustment of the Warrant Number and the Base Price, the Warrant Number and
the Base Price then in effect shall forthwith be readjusted to the Warrant
Number and the Base Price which would have been in effect if the adjustments
made upon the original issuance or grant of such options or rights had excluded
from the calculation of Common Stock issued and outstanding (or deemed issued)
immediately after such issuance or grant, all Common Stock which the holders of
such expired or lapsed options or rights had been entitled to acquire
thereunder, and had excluded from the calculation of consideration deemed to
have been received by the Company, the consideration deemed by the terms of sub-
paragraph (c) to have been received for such expired or lapsed options or
warrants. Upon the retirement without conversion or exchange of obligations
described in subparagraph (d) above in any case where the issuance thereof had
previously been the basis for an adjustment of the Warrant Number and the Base
Price, the Warrant Number and the Base Price then in effect shall forthwith be
readjusted to the Warrant Number and the Base Price which would have been in
effect if the adjustments made upon the original issuance of such obligations
had excluded from the calculation of Common Stock issued and outstanding (or
deemed issued) immediately after such issuance, all Common Stock which the
holders of such retired obligations had been entitled to acquire thereunder, and
had excluded from the calculation of consideration deemed to have been received
by the Company, all consideration deemed, by the terms of subparagraph (d), to
have been received for such retired obligations.

6.   Covenants As To Par Value, Authority and Charges.  If at any time the per
share exercise price of this Warrant shall be less than the par value of one
share of Common Stock, the Company shall take such action as shall be necessary
to reduce such par value to an amount less than the per share exercise price of
this Warrant. The Company shall take such action as shall be necessary to
maintain the authority to issue validly, upon exercise hereof according to the
terms herein, the number of shares of Common Stock provided herein, and shall
cause such shares, upon payment of the Exercise Price, to be fully paid, free of
preemptive rights and free from all taxes, liens, security interests and charges
with respect to the issuance thereof.

7.   Notice of Stock Sales and Other Adjustments.  Whenever there is an issuance
or sale of Additional Stock, the Company shall promptly place on file at the
Company's principal office a certificate signed by its Chief Financial Officer
stating the per-share price applicable to the transaction, a detailed
calculation of such price, the number of shares of Common Stock sold or issued,
the consideration received, and all fees and expenses incurred, and further
describing the transaction in detail and the adjustments (if any) to the Base
Price and the Warrant Number resulting therefrom; and cause a copy of such
certificate to be sent to the Holder. Whenever the number of Warrant Number or
the Base Price shall change other than upon the issuance of Additional Stock,
the Company shall promptly notify the Holder in writing of such change and
deliver to Holder a statement setting forth the Warrant Number and the Base
Price after such adjustment(s), and a brief statement of the facts requiring
such adjustment(s) and the computation by which such adjustment(s) was made.

                                       7
<PAGE>

8.   Holder's Rights to Redemptions and Dividends.  The Holder shall be entitled
to a ratable portion of any redemption of stock by the Company from Gold & Appel
Transfer, S.A., James Kenefick, or any other owner of at least fifteen percent
of the Common Stock (a Qualifying Redemption). If the Company makes a Qualifying
Redemption or otherwise purchases for value any of its Common Stock from any
owner of stock described in the preceding sentence prior to full exercise of
this Warrant, the Company shall provide to the Holder at the time of the
exercise hereof, in addition to the Warrant Shares, the same proceeds the Holder
would have been entitled to receive if this Warrant had been exercised in full
prior to the record date for such redemption and Holder had been entitled to
have a ratable portion of its Warrant Shares redeemed at the same price per
Share. Likewise, the Holder will be entitled to a ratable portion of any
dividends or other distributions paid by the Company. If the Company pays any
dividend or makes any distribution (whether in cash, property or securities) to
the holders of Common Stock prior to full exercise of this Warrant, then the
Company shall provide the Holder, at the time of exercise hereof, in addition to
the Warrant Shares, the same proceeds the Holder would have been entitled to
receive on the Warrant Shares if this Warrant had been exercised in full prior
to the record date for such dividend or distribution or, if no record is taken,
the date as of which the record holders of Common Stock entitled to such
dividend or distribution are to be determined.

9.   Exercise Procedure.

     (a) Unconditional Subscription.  This Warrant may be exercised by
presenting it and tendering the aggregate Exercise Price in legal tender or by
bank's, cashier's or certified check to the Company at its address specified in
the Warrant Purchase Agreement, along with written subscription substantially in
the form of Exhibit 9.00 hereof. The date on which this Warrant is thus
            ------------
presented, accompanied by tender or payment as hereinbefore or hereinafter
provided, is referred to herein as the Exercise Date. The Company shall
forthwith at its expense (including the payment of issue taxes), issue and
deliver the proper number of shares of Common Stock, and such shares shall be
deemed validly issued for all purposes as of the opening of business on the
Exercise Date regardless of any delay in the actual issuance.

     (b) Conditional Exercise.  This Warrant may also be exercised conditionally
in contemplation of the future consummation of one or more transactions, by
presenting it and tendering the aggregate Exercise Price in the manner specified
in subparagraph (a) above, along with a notice clearly stating the conditional
nature of the exercise, specifying the conditions precedent to the exercise in
reasonable detail and the date after which the exercise shall be deemed
withdrawn if such conditions remain unsatisfied, and otherwise containing the
information called for in Exhibit 9.00. Upon such presentment, tender and
                          ------------
notice, if the specified conditions are satisfied within the specified period
without prior revocation of the exercise by Holder, the Company shall forthwith
issue and deliver the proper number of shares of Common Stock in the manner
described above. In such case, the date on which the last remaining condition
was met shall be referred to herein as the Exercise Date, and such shares shall
be deemed validly issued for all purposes as of the opening of business on such
exercise date, regardless of any delay in the actual issuance. If, on the other
hand, after any such presentment, tender and notice, any condition is
unsatisfied on the specified date, or if the Holder revokes such exercise in
writing prior to the satisfaction of all conditions, the Company shall forthwith
return

                                       8
<PAGE>

this Warrant and the Exercise Price to the Holder and this Warrant shall be
deemed not to have been exercised.

10.  Exchange of Shares for Exercise Price.  The Holder at its option may
provide the Exercise Price under this Warrant by reducing the number of shares
for which the Warrant is otherwise exercisable by the number of shares having
fair market value equal to the Exercise Price. In such a case, delivery of the
Exercise Price shall be effected by Holder's written notice to the Company of
such reduction. For purposes hereof, the average of any publicly-reported
closing bid and asked prices for the Common Stock on the last ten (10) trading
days prior to the Exercise Date, shall be deemed to be the fair market value of
the Common Stock.

11.  Sale or Exchange of Company or Assets.  If prior to the exercise in full
hereof, the Company sells or exchanges all or substantially all of its assets,
or all or substantially all the outstanding Common Stock is sold or exchanged to
any party other than the Holder, then the Holder at its option may receive upon
exercise hereof, in lieu of the Warrant Shares, such money or property it would
have been entitle to receive if this Warrant had been exercised in full prior to
such sale or exchange.

12.  Resale of Warrant or Shares.  Neither this Warrant nor other shares of
common stock issuable upon exercise hereof, have been registered under the
Securities Act of 1933 as amended, or under the securities laws of any state.
----------------------
Neither this Warrant nor any shares when issued may be sold, transferred,
pledged or hypothecated in the absence of (i) an effective registration
statement for this Warrant or the shares, as the case may be, under the
Securities Act of 1933 as amended and such registration or qualification as may
----------------------
be necessary under the securities laws of any state, or (ii) an opinion of
counsel reasonably satisfactory to the Company that such registration or
qualification is not required. The Company shall cause a certificate or
certificates evidencing all or any of the shares issued upon exercise hereof
prior to said registration and qualification of such shares to bear the
following legend:

          The shares evidenced by this certificate have not been registered
          under the Securities Act of 1933 as amended, or under the securities
                    ----------------------
          laws of any state. The shares may not be sold, transferred, pledged or
          hypothecated in the absence of an effective registration statement
          under the Securities Act of 1933, as amended, and such registration or
                    ----------------------
          qualification as may be necessary under the securities laws of any
          state, or an opinion of counsel satisfactory to the Company that such
          registration or qualification is not required.

13.  Transfer.  This Warrant shall be registered on the books of the Company
which shall be kept at its principal office for that purpose, and shall be
transferable in whole or in part but only on such books by the Holder in person
or by duly authorized attorney with written notice substantially in the form of
Exhibit 13.00 hereof, and only in compliance with the preceding paragraph. The
-------------
Company may issue appropriate stop orders to its transfer agent to prevent a
transfer in violation of the preceding paragraph.

                                       9
<PAGE>

14.  Closing of Books.  The Company shall not close its transfer books against
the transfer of this Warrant or any Common Stock or other securities issuable
upon the exercise of this Warrant in any manner which interferes with the
exercise of this Warrant.

15.  Replacement of Warrant.  At the request of the Holder and on production of
evidence reasonably satisfactory to the Company of the loss, theft, destruction
or mutilation of this Warrant and (in the case of loss, theft, or destruction)
if required by the Company, upon delivery of an indemnity agreement with surety
in such reasonable amount as the Company may determine thereof, the Company at
its expense will issue in lieu thereof a new Warrant of like tenor.

16.  Investment Covenant.  The Holder by its acceptance hereof covenants that
this Warrant is, and any stock issued hereunder will be, acquired for investment
purposes, and that the Holder will not distribute the same in violation of any
state or federal law or regulation.

17.  Notice.  Any notice or other communication required by this Warrant to be
given to the Holder shall be provided according to the notice provisions in the
Warrant Purchase Agreement.

18.  Waiver of Jury Trial.  THE COMPANY WAIVES ALL RIGHT TO TRIAL BY JURY OF ALL
CLAIMS, DEFENSES, COUNTERCLAIMS AND SUITS OF ANY KIND DIRECTLY OR INDIRECTLY
ARISING FROM OR RELATING TO THIS WARRANT OR THE DEALINGS OF THE PARTIES IN
RESPECT HERETO. THE COMPANY ACKNOWLEDGES AND AGREES THAT THIS PROVISION IS A
MATERIAL TERM OF THIS WARRANT AND THAT THE HOLDER WOULD NOT EXTEND ANY FUNDS
UNDER THE LOAN DOCUMENTS IF THIS WAIVER OF JURY TRIAL WERE NOT A PART OF THIS
WARRANT. THE COMPANY ACKNOWLEDGES THAT THIS IS A WAIVER OF A LEGAL RIGHT AND
THAT IT MAKES THIS WAIVER VOLUNTARILY AND KNOWINGLY AFTER CONSULTATION WITH, OR
THE OPPORTUNITY TO CONSULT WITH, COUNSEL OF ITS CHOICE. THE COMPANY AGREES THAT
ALL SUCH CLAIMS, DEFENSES, COUNTERCLAIMS AND SUITS SHALL BE TRIED BEFORE A JUDGE
OF A COURT OF COMPETENT JURISDICTION, WITHOUT A JURY.

     IN WITNESS WHEREOF, the Company has caused this Warrant to be signed on its
behalf by its undersigned officer, and its corporate seal to be hereunto
affixed, as of the date first above written.

                                Net-tel Communications, Inc.

Attest:

By:  /s/ Thomas Lera           By:   /s/ James F. Kenefick
   ---------------------           -------------------------------
   Thomas Lera, Secretary          James F. Kenefick, President

                                       10
<PAGE>

                                  Exhibit 9.00

                            IRREVOCABLE SUBSCRIPTION

To:  Net-Tel Communications, Inc.

Gentlemen:

The undersigned hereby elects to exercise its right under the attached Warrant
by purchasing _________________ shares of the Common Stock of your company, and
hereby irrevocably subscribes to such issue. The certificates for such shares
shall be issued in the name of

------------------------------------------------------------------------------
(Name)

------------------------------------------------------------------------------
(Address)

------------------------------------------------------------------------------
(Taxpayer Number)

and deliver to _______________________________________________________________
                   (Name)

------------------------------------------------------------------------------
(Address)

The exercise price of $________________ is enclosed.

Date:__________________________________________

Signed:________________________________________ (Name of Holder, Please Print)

------------------------------------------------------------------------------
(Address)

------------------------------------------------------------------------------
(Signature)

                                       11
<PAGE>

                                 Exhibit 13.00

                                   ASSIGNMENT

FOR VALUE RECEIVED: __________________________________________________________

------------------------------------------------------------------------------
(Name)

------------------------------------------------------------------------------
(Address)

                 the attached Warrant together with all right, title and
----------------
interest therein, and does hereby irrevocably appoint ______________________
attorney to transfer said Warrant on the books of Net-Tel Communications, Inc.,
with full power of substitution in the premises.

Done this _____ day of _______________, 19___.

Signed:______________________________________

By:__________________________________________

Its:_________________________________________

                                       12

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