Document:

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                                                                    Exhibit 10.3

                                IFX CORPORATION

                        STOCK OPTION AND INCENTIVE PLAN

                          (as amended on _____, 2001)

1.  Preamble.
    --------

     IFX Corporation, a Delaware corporation (the "Company"), hereby establishes
the IFX Corporation Stock Option and Incentive Plan (the "Plan") as a means
whereby the Company may, through awards of (i) incentive stock options within
the meaning of section 422 of the Code (as herein defined), (ii) stock
appreciation rights, (iii) non-qualified stock options, (iv) restricted stock,
and (v) phantom stock:

          (a) provide employees of the Company and its subsidiaries with
     additional incentive to promote the success of the Company's and its
     subsidiaries' businesses and encourage such employees to remain in the
     employ of the Company and its subsidiaries;

          (b) provide incentive for potential employees to accept employment
     with the Company;

          (c) provide Directors of the Company who are not otherwise employees
     of the Company with additional incentive to promote the success of the
     Company's business; and

          (d) provide consultants and other independent contractors who provide
     services to the Company with additional incentive to promote the success of
     the Company's business.

     The provisions of this Plan do not apply to or affect any option, stock
appreciation right, or stock heretofore or hereafter granted under any other
stock plan of the Company or any subsidiary, and all such options, stock
appreciation right or stock continue to be governed by and subject to the
applicable provisions of the plan or agreement under which they were granted.

2.   Definitions.
     -----------

     2.01  "Board" or "Board of Directors" means the board of directors of the
Company.

     2.02  "Cause" means, as determined in the sole discretion of the Board, a
Participant's (a) commission of a felony; (b) material or repeated dishonesty or
misrepresentation involving the Company or any Subsidiary; (c) serious
misconduct in the performance or non-performance of Participant's
responsibilities as an employee, Officer, Director, consultant or independent
contractor; (d) violation of a material condition of employment; (e)
unauthorized use of trade secrets or confidential information; or (f) aiding a
competitor of the Company or any Subsidiary.
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     2.03  "Change in Control" means the occurrence of any one of the following
events: (a) any consolidation, merger or other similar transaction involving the
Company, if the Company is not the continuing or surviving corporation, or which
contemplates that all or substantially all of the business and/or assets of the
Company will be controlled by another corporation; (b) any sale, lease, exchange
or transfer (in one transaction or series of related transactions) of all or
substantially all of the assets of the Company; (c) approval by the stockholders
of the Company of any plan or proposal for the liquidation or dissolution of the
Company, unless such plan or proposal is abandoned within 60 days following such
approval; (d) the acquisition by any "person" (as such term is used in Sections
13(d) and 14(d)(2) of the Securities Exchange Act of 1934), or two or more
Persons acting in concert, of beneficial ownership (within the meaning of Rule
13d-3 promulgated under the Exchange Act) of 25% or more of the outstanding
shares of voting stock of the Company; provided, however, that for purposes of
the foregoing, "person" excludes UBS Capital Americas III, L.P., UBS Capital,
LLC, Lee S. Casty, the Casty Grantor Subtrust, International Technology
Investments, LC or any of their Affiliates, any underwriter purchasing shares of
the Company with the intent of reselling them, or (e) if, during any period of
24 consecutive calendar months commencing on the date of this Agreement, those
individuals (the "Continuing Directors") who either (i) were directors of the
Company on the first day of each such period, or (ii) subsequently became
directors of the Company and whose actual election or initial nomination for
election subsequent to that date was approved by a majority of the Continuing
Directors then on the board of directors of the Company, cease to constitute a
majority of the board of directors of the Company.

     2.04  "Code" means the Internal Revenue Code of 1986, as it exists now and
as it may be amended from time to time.

     2.05  "Committee" means the committee comprised of two or more Directors
appointed by the Board to administer the Plan.

     2.06  "Common Stock" means the common stock of the Company, $.02 par value
per share.

     2.07  "Company" means IFX Corporation, a Delaware corporation, and any
successor thereto.

     2.08  "Director" means a member of the Board.

     2.09  "Disability" means disability as defined in the Company's long-term
disability plan then in effect.

     2.10  "Exchange Act"  means the Securities Exchange Act of 1934, as it
exists now or from time to time may hereafter be amended.

     2.11  "Fair Market Value" means for the relevant day:

           (a) If shares of Common Stock are listed or admitted to unlisted
     trading privileges on any national or regional securities exchange, the
     last reported sale price,

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     regular way, on the composite tape of that exchange on the day Fair Market
     Value is to be determined;

           (b) If the Common Stock is not listed or admitted to unlisted trading
     privileges as provided in paragraph (a), and if sales prices for shares of
     Common Stock are reported by the National Association of Securities
     Dealers, Inc. Automated Quotations, Inc. National Market System ("Nasdaq
     System"), then the last sale price for Common Stock reported as of the
     close of business on the day Fair Market Value is to be determined, or if
     no such sale takes place on that day, the average of the high bid and low
     asked prices so reported and, if Common Stock is not traded on that day,
     the next preceding day on which such stock was traded; or

           (c) If trading of the Common Stock is not reported by the Nasdaq
     System or on a stock exchange, Fair Market Value will be determined by the
     Committee in its discretion based upon the best available data.

     2.12  "ISO" means incentive stock options within the meaning of Section 422
of the Code.

     2.13  "Naked SAR" means a SAR issued not in connection with an ISO or NSO.

     2.14  "NSO" means non-qualified stock options, which are not intended to
qualify under Section 422 of the Code.

     2.15  "Option" means the right of a Participant, whether granted as an ISO
or an NSO, to purchase a specified number of shares of Common Stock, subject to
the terms and conditions of the Plan.

     2.16  "Option Date" means the date upon which an Option, SAR, Restricted
Stock or Phantom Stock is awarded to a Participant under the Plan.

     2.17  "Option Price" means the price per share at which an Option may be
exercised.

     2.18  "Participant" means an individual to whom an Option, SAR, Phantom
Stock or Restricted Stock has been granted under the Plan.

     2.19  "Phantom Stock" means a hypothetical share of Common Stock issued as
phantom stock under the Plan.

     2.20  "Plan" means the IFX Corporation Stock Option Plan, as set forth
herein and as from time to time amended.

     2.21  "Restricted Stock" means Common Stock awarded to a Participant
pursuant to this Plan and subject to the restrictions contained in Section 9.

     2.22  "SAR" means a stock appreciation right.  A SAR may be a Naked SAR or
a Tandem SAR.

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     2.23  "Securities Act" means the Securities Act of 1933, as it exists now
or from time to time may hereinafter be amended.

     2.24  "Subsidiary" means any corporation or other entity of which the
majority voting power or equity interest is owned directly or indirectly by the
Company.

     2.25  "Tandem SAR" means a SAR associated with and issued in connection
with an ISO or NSO.

     2.26  Rules of Construction.

           (a) Governing Law.  The construction and operation of this Plan are
     governed by the laws of the State of Delaware.

           (b) Undefined Terms.  Unless the context requires another meaning,
     any term not specifically defined in this Plan has the meaning given to it
     by the Code.

           (c) Headings.  All headings in this Plan are for reference only and
     are not to be utilized in construing the Plan.

           (d) Gender.  Unless clearly appropriate, all nouns of whatever gender
     refer indifferently to persons of any gender.

           (e) Singular and Plural.  Unless clearly inappropriate, singular
     terms refer also to the plural and vice versa.

           (f) Severability.  If any provision of this Plan is determined to be
     illegal or invalid for any reason, the remaining provisions shall continue
     in full force and effect and shall be construed and enforced as if the
     illegal or invalid provision did not exist, unless the continuance of the
     Plan in such circumstances is not consistent with its purposes.

           (g) Termination of Employment.  For all purposes of this Plan, an
     employee will have terminated employment with the Company when the
     employee's employment relationship with the Company and all of its
     subsidiaries is terminated. Additionally, with respect to consultants and
     independent contractors, for all purposes of the Plan such consultant's or
     independent contractor's "employment with the Company" shall be considered
     terminated upon the termination of any consulting or independent contractor
     agreement, or when the consultant or independent contractor no longer
     performs any services for the Company.

3.   Stock Subject to the Plan.
     -------------------------

     Except as otherwise provided in Section 13, the aggregate number of shares
of Common Stock that may be issued under Options or as Restricted Stock under
this Plan may not exceed 4,631,790 shares of Common Stock. Reserved shares may
be either authorized but unissued shares or treasury shares, in the Board's
discretion. If any awards hereunder shall terminate or expire, as to any number
of shares, new Options, and Restricted Stock may thereafter be awarded

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with respect to such shares. Except as otherwise provided in Section 13, no
Participant may be granted awards under the Plan in any calendar year in respect
of more than 300,000 shares of Common Stock.

4.   Administration.
     --------------

     The Plan shall be administered by the Committee, subject to any rights of
approval by preferred stockholders of the Company and approval by the Board if
required to meet any legal or regulatory requirements. In addition to any other
powers set forth in this Plan, the Committee has the authority, subject to the
preceding sentence:

          (a) to construe and interpret the Plan, and to remedy any ambiguities
     or inconsistencies therein;

          (b) to establish, amend and rescind appropriate rules and regulations
     relating to the Plan;

          (c) subject to the express provisions of the Plan, to determine the
     individuals who will receive awards of Options, Restricted Stock, Phantom
     Stock and/or SARs, the times when they will receive them, the number of
     shares to be subject to each award and the Option Price, payment terms,
     payment method, and expiration date applicable to each award;

          (d) to contest on behalf of the Company or Participants, at the
     expense of the Company, any ruling or decision on any matter relating to
     the Plan or to any awards of ISOs, NSOs, Restricted Stock, Phantom Stock
     and/or SARs;

          (e) generally, to administer the Plan, and to take all such steps and
     make all such determinations in connection with the Plan and the awards of
     ISOs, NSOs, Restricted Stock, Phantom Stock and/or SARs granted thereunder
     as it may deem necessary or advisable;

          (f) to determine the form in which payment of a SAR or a Phantom
     Stock award granted hereunder will be made (i.e., cash, Common Stock or a
     combination thereof) or to approve a participant's election to receive cash
     in whole or in part in settlement of the SAR or Phantom Stock award;

          (g) to determine the form in which tax withholding under Section 16
     of this Plan will be made; and

          (h) to amend the Plan or any Option, Restricted Stock, Phantom Stock
     or SAR granted or awarded hereunder as may be necessary in order for any
     business combination involving the Company to qualify for pooling-of-
     interest treatment under APB No. 16.

5.   Eligible Participants.
     ---------------------

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     Subject to the provisions of the Plan, the Committee shall determine from
time to time (a) those employees, officers, Directors, consultants and
independent contractors of the Company or a Subsidiary, and non-employees and
non-officers to whom the Company or any Subsidiary has extended an offer of
employment, who shall be designated as Participants, and (b) the number of
Options, SARs, Restricted Stock, and Phantom Stock, or any combination thereof,
to be awarded to each such Participant; provided, however, that no ISOs or
Tandem SARs granted with respect to ISOs shall be awarded under the Plan more
than ten years after the date this Plan is adopted by the Board. In addition, no
ISOs may be awarded to a Participant who is not an employee of the Company or a
Subsidiary.

6.   Terms and Conditions of Incentive Stock Options.
     -----------------------------------------------

     The Committee, in its discretion, may grant ISOs to any Participant under
the Plan; provided, however, that no ISOs may be granted to a Director or other
Participant who is not an employee of the Company or a Subsidiary. Each ISO
shall be evidenced by an agreement between the Company and the Participant in a
form approved by the Committee. Unless the Committee, in its discretion,
determines otherwise, each ISO agreement shall be subject to the following terms
and conditions and to such other terms and conditions as the Committee may deem
appropriate;

          (a) Option Period.  Each ISO will expire as of the earliest of:

              (i)   the date on which it is forfeited under the provisions of
                    Section 12;

              (ii)  10 years (or five years as specified in Section 6(e)) from
                    the Option Date;

              (iii) three months after the Participant's termination of
                    employment for any reason other than death or Disability; or

              (iv)  six months after the Participant's death or Disability.

          (b) Option Price.  Subject to the provisions of Section 6(e), the
     Option Price per share shall be determined by the Committee at the time any
     ISO is granted, and shall not be less than the Fair Market Value of the
     Common Stock subject to the ISO on the Option Date.

          (c) Other Option Provisions.  The form of ISO authorized by the Plan
     may contain such other provisions as the Committee may, from time to time,
     determine; provided, however, that such other provisions may not be
     inconsistent with any requirements imposed on incentive stock options under
     Section 422 of the Code.

          (d) Limitations on Awards.  The aggregate Fair Market Value,
     determined as of the Option Date, of Common Stock with respect to which
     ISOs are exercisable by a Participant for the first time during any
     calendar year under all ISO plans of the Company and any Subsidiary shall
     not exceed $100,000.

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          (e) Awards to Certain Stockholders.  Notwithstanding Sections 6(a) and
     6(b) hereof, if an ISO is granted to a Participant who owns stock
     representing more than 10% of the voting power of all classes of stock of
     the Company or a Subsidiary (as determined under the Code), the exercise
     period specified in the ISO agreement for which the ISO thereunder is
     granted shall not exceed five years from the Option Date and the Option
     Price shall be at least 110% of the Fair Market Value (as of the Option
     Date) of the Common Stock subject to the ISO.

7.   Terms and Conditions of Non-Qualified Stock Options.
     ---------------------------------------------------

     The Committee, in its discretion, may grant NSOs to any Participant under
the Plan.  Each NSO shall be evidenced by an agreement between the Company and
the Participant in a form approved by the Committee.  Unless the Committee, in
its discretion, determines otherwise, each NSO agreement shall be subject to the
following terms and conditions and to such other terms and conditions as the
Committee may deem appropriate:

          (a) Option Period.  Each NSO will expire as of the earliest of:

              (i)   the date on which it is forfeited under the provisions of
                    Section 12;

              (ii)  the date three months after the Participant's termination of
                    employment for any reason other than death or Disability; or

              (iii) the date six months after the Participant's death or
                    Disability.

          (b) Option Price.  At the time when the NSO is granted, the Committee
     will fix the Option Price. The Option Price may be greater than, less than,
     or equal to Fair Market Value on the Option Date.

          (c) Other Option Provisions.  The form of NSO authorized by the Plan
     may contain such other provisions as the Committee may from time to time
     determine.

8.   Terms and Conditions of Stock Appreciation Rights.
     -------------------------------------------------

     The Committee may, in its discretion, grant a SAR to any Participant under
the Plan. Each SAR shall be evidenced by an agreement between the Company and
the Participant, in a form approved by the Committee, and may be a Naked SAR or
a Tandem SAR. Unless the Committee, in its discretion, determines otherwise,
each SAR awarded to Participants under the Plan shall be subject to the
following terms and conditions and to such other terms and conditions as the
Committee may deem appropriate:

          (a) Tandem SARs.  Tandem SARs shall terminate on the same date as the
     related ISO or NSO. A Tandem SAR shall be exercisable only if the Fair
     Market Value of a share of Common Stock on the date of surrender exceeds
     the Option Price for the related Option, and then shall be exercisable to
     the extent, and only to the extent, that the related Option is exercisable.
     A Tandem SAR shall entitle the Participant to whom it is granted the right
     to elect, so long as such Tandem SAR is exercisable and subject to such

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     limitations as the Committee shall have imposed, to surrender any then
     exercisable portion of his related Option, in whole or in part, and receive
     from the Company in exchange, without any payment of cash (except for
     applicable employee withholding taxes), that number of shares of Common
     Stock having an aggregate Fair Market Value on the date of surrender equal
     to the product of (i) the excess of the Fair Market Value of a share of
     Common Stock on the date of surrender over the per share Option Price, and
     (ii) the number of shares of Common Stock subject to such Option or portion
     thereof which is surrendered. Any Option or portion thereof which is
     surrendered shall no longer be exercisable. The Committee, in its sole
     discretion, may allow the Company to settle all or part of the Company's
     obligation arising out of the exercise of a Tandem SAR by the payment of
     cash equal to the aggregate Fair Market Value of the shares of Common Stock
     which the Company would otherwise be obligated to deliver.

          (b) Naked SARs.  Naked SARs shall terminate as provided in the
     Participant's SAR agreement. The Committee may at the time of granting any
     Naked SAR add such conditions and limitations to the Naked SAR as it shall
     deem advisable, including but not limited to, limitations on the period
     within which the Naked SAR shall be exercisable and the maximum amount of
     appreciation to be recognized with regard to such Naked SAR.

          (c) Other Conditions.  If a Participant is subject to Section 16(a)
     and Section 16(b) of the Exchange Act, the Committee may at any time add
     such additional conditions and limitations to such SAR which the Committee,
     in its discretion, deems necessary or desirable in order to comply with
     Section 16(a) or Section 16(b) of the Exchange Act and the rules and
     regulations issued thereunder, or in order to obtain any exemption
     therefrom.

9.   Terms and Conditions of Restricted Stock Awards.
     ------------------------------------------------

     The Committee, in its discretion, may grant Restricted Stock to any
Participant under the Plan. Each grant of Restricted Stock shall be evidenced by
an agreement between the Company and the Participant in a form approved by the
Committee. Unless the Committee, in its discretion, determines otherwise, all
shares of Common Stock awarded to Participants under the Plan as Restricted
Stock shall be subject to the following terms and conditions and to such other
terms and conditions as the Committee may deem appropriate:

          (a) Restricted Period.  Shares of Restricted Stock awarded to
     Participants may not be sold, transferred, pledged or otherwise encumbered
     before they vest as provided for in Section 12 hereof. Subject to the
     provisions of subparagraphs (b) and (c) below and any other restrictions
     imposed by law, certificates evidencing shares of Restricted Stock that
     vest will be transferred to the Participant or, in the event of his death,
     to the beneficiary or beneficiaries designated by writing filed by the
     Participant with the Committee for such purpose or, if none, to his estate.

          (b) Forfeitures.  A Participant shall forfeit all unpaid accumulated
     dividends and all shares of Restricted Stock which have not vested prior to
     the date that his employment with the Company is terminated for any reason.

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          (c) Certificates Deposited With Company.  Each certificate issued in
     respect of shares of Restricted Stock awarded under the Plan shall be
     registered in the name of the Participant and deposited with the Company.
     Each such certificate shall bear the following (or a similar) legend:

     "The transferability of this certificate and the shares of stock
     represented hereby are subject to the terms and conditions (including
     forfeiture) relating to Restricted Stock contained in the IFX Corporation
     Stock Option Plan and an agreement entered into between the registered
     owner and IFX Corporation. Copies of such Plan and agreement are on file at
     the principal office of IFX Corporation."

          (d) Stockholder Rights.  Subject to the foregoing restrictions, each
     Participant shall have all the rights of a stockholder with respect to his
     shares of Restricted Stock including, but not limited to, the right to vote
     such shares.

          (e) Dividends.  On each Common Stock dividend payment date, each
     Participant shall receive an amount equal to the dividend paid on that date
     on a share of Common Stock, multiplied by his number of shares of
     Restricted Stock.

10.  Terms and Conditions of Phantom Stock.
     -------------------------------------

     The Committee may, in its discretion, award Phantom Stock to any
Participant under the Plan. Each award of Phantom Stock shall be evidenced by an
agreement between the Company and the Participant. The Committee may at the time
of awarding any Phantom Stock add such additional conditions and limitations to
the Phantom Stock as it shall deem advisable, including, but not limited to, the
right for Participants to receive dividends equivalent to those paid on Common
Stock, limitations on the period or periods within which the Phantom Stock may
be surrendered, and the maximum amount of appreciation to be recognized with
regard to such Phantom Stock. An award of Phantom Stock shall entitle the
Participant to whom it is awarded the right to elect, so long as such Phantom
Stock is vested and subject to such limitations as the Committee shall have
imposed, to surrender any then vested portion of the Phantom Stock, in whole or
in part, and receive from the Company in exchange therefor the Fair Market Value
on the date of surrender of the Common Stock to which the surrendered Phantom
Stock relates in cash or in shares of Common Stock as the Committee may
determine. If a Participant is subject to Section 16(a) and Section 16(b) of the
Exchange Act, the Committee may at any time add such additional conditions and
limitations to such Phantom Stock which, in its discretion, the Committee deems
necessary or desirable in order to comply with Section 16(a) or Section 16(b) of
the Exchange Act and the rules and regulations promulgated thereunder, or in
order to obtain any exemption therefrom.

11.  Manner of Exercise of Options.
     -----------------------------

     To exercise an Option in whole or in part, a Participant, any permitted
transferee of a Participant or, after his death, a Participant's executor or
administrator must give written notice to the Committee, stating the number of
shares to which he intends to exercise the Option. The Company will issue the
shares with respect to which the Option is exercised upon payment in

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full of the Option Price. The Option Price may be paid (i) in cash, (ii) in
shares of Common Stock having an aggregate Fair Market Value, as determined on
the date of delivery, equal to the Option Price (provided that such shares have
been held by the Participant for at least six months prior to the date of
payment), or (iii) by delivery of irrevocable instructions to a broker to
promptly deliver to the Company the amount of sale or loan proceeds necessary to
pay for all Common Stock acquired through such exercise and any tax withholding
obligations resulting from such exercise.

12.  Vesting.
     -------

     (a) A Participant may not exercise an Option, surrender a SAR or Phantom
Stock or transfer, pledge or dispose of any Restricted Stock until it has become
vested. The portion of an Option, SAR or Phantom Stock award or Restricted Stock
that is vested depends upon the period that has elapsed since the Option Date.
Unless the Committee establishes a different vesting schedule at the time an
Option is granted or the Restricted Stock, SAR or Phantom Stock is awarded, all
Options granted under this Plan, Restricted Stock, SARs and Phantom Stock
awarded under this Plan shall vest according to the following schedule:

                   Period Elapsed             Cumulative Vested Percentage
              -----------------------         ----------------------------

          First Anniversary of Option Date                25%
          Second Anniversary of Option Date               50%
          Third Anniversary of Option Date                75%
          Fourth Anniversary of Option Date               100%

Except as provided below, if a Participant's employment with the Company or its
Subsidiaries is terminated for any reason, such Participant automatically
forfeits any Options, Restricted Stock, SARs and/or Phantom Stock that are not
yet vested. A transfer of employment from the Company to a Subsidiary or
affiliate, or vice versa, is not a termination of employment for purposes of
this Plan. Unless the Committee in its sole discretion specifically waives the
application of this sentence, then notwithstanding the vesting schedule
contained herein or in the Participant's Stock Option Agreement, if the
Participant's employment, or if a Director, his membership on the Board, is
terminated for Cause, all Options, SARs, Restricted Stock and/or Phantom Stock
granted or awarded to the Participant will be immediately cancelled and
forfeited by the Participant upon delivery to him of notice of such termination.

     (b) Upon a Change in Control, all Options, SARs, Restricted Stock and/or
Phantom Stock granted or awarded to the Participant on or after _______, 2001
shall become 100% vested and immediately exercisable as of the effective date of
the Change in Control.

     (c) If it determines that special circumstances exist, the Committee may
accelerate the time in which an award under the Plan vests, even if, under its
existing terms, such award would not then be exercisable.

13.  Adjustments to Reflect Changes in Capital Structure.
     ---------------------------------------------------

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     If there is any change in the corporate structure or shares of the Company,
the Board of Directors may, in its discretion, make any adjustments necessary to
prevent accretion, or to protect against dilution, in the number and kind of
shares authorized by the Plan and, with respect to outstanding Options,
Restricted Stock, Phantom Stock and/or SARs, in the number and kind of shares
covered thereby and in the applicable Option Price; provided, however, no
adjustment will be made for the issuance of preferred stock or the conversion of
convertible preferred stock. For the purpose of this Section 13, a change in the
corporate structure or shares of the Company includes, without limitation, any
change resulting from a recapitalization, stock split, stock dividend,
consolidation, rights offering, spin-off, reorganization, or liquidation and any
transaction in which shares of Common Stock are changed into or exchanged for a
different number or kind of shares of stock or other securities of the Company
or another corporation.

14.  Non-Transferability of Options, SARs and Phantom Stock.
     ------------------------------------------------------

     The Options and SARs granted or Phantom Stock awarded under the Plan are
not transferable, voluntarily or involuntarily, other than by will or the laws
of descent and distribution, or to the extent permissible under Section 422 of
the Code, pursuant to a qualified domestic relations order as defined in Section
414(p) of the Code; provided, however, that the Committee, in its discretion,
may permit Options to be transferable by a Participant to members of such
Participant's immediate family or to family trusts, partnerships and other
entities comprised solely of the Participant or members of the Participant's
immediate family.

15.  Rights as Stockholder.
     ---------------------

     No Common Stock may be delivered upon the exercise of any Option until full
payment of the Option Price has been made and all income tax withholding
requirements thereon have been satisfied. A Participant has no rights whatsoever
as a stockholder with respect to any shares covered by an Option until the date
of the issuance of a stock certificate for the shares. A Participant who has
been granted SARs or Phantom Stock shall have no rights whatsoever as a
stockholder with respect to such SARs or Phantom Stock.

16.  Withholding Tax.
     ---------------

     The Company shall have the right to withhold or to require a Participant to
remit to the Company, in cash or shares of Common Stock, with respect to any
payments made to Participants under the Plan, any taxes required by law to be
withheld because of such payments. Subject to the consent of the Committee with
respect to (a) the exercise of a NSO, (b) the lapse of restrictions on
Restricted Stock, (c) a "disqualifying disposition" of a ISO, as determined
pursuant to the Code, or (d) the issuance of any other stock award under the
Plan, a Participant may make an irrevocable election (an "Election") to (i) have
shares of Common Stock otherwise issuable withheld, or (ii) tender back to the
Company shares of Common Stock received pursuant to (a), (b), or (d), or (iii)
deliver back to the Company pursuant to (a), (b), or (d) previously acquired
shares of Common Stock having a Fair Market Value sufficient to satisfy all or
part of the Participant's estimated tax obligations. Such Election must be made
by a Participant prior to the date on which the relevant tax obligation arises.
The Committee may disapprove of any

                                     -11-
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Election, may suspend or terminate the right to make Elections, or may provide
with respect to any award under this Plan that the right to make Elections shall
not apply to such award.

17.  No Right To Employment.
     ----------------------

     Participation in the Plan will not give any Participant a right to be
retained as an employee of the Company or any subsidiary, or any right or claim
to any benefit under the Plan, unless the right or claim has specifically
accrued under the Plan.

18.  Amendment of the Plan.
     ---------------------

     The Committee may from time to time amend or revise the terms of this Plan
in whole or in part and may without limitation, adopt any amendment deemed
necessary, subject only to applicable laws, regulations and the rules and
regulations of the Nasdaq Stock Exchange or any national stock exchange upon
which the Common Stock may be listed; provided, however, that (a) except as
provided in Section 4(h), no change in any award previously granted to a
Participant may be made that would impair the rights of the Participant without
the Participant's consent, or (b) no amendment may extend the period during
which a Participant may exercise an ISO beyond the period set forth in Section
6(a)(ii) or 6(e).

19.  Stockholder Approval.
     --------------------

     Continuance of the Plan shall be subject to approval by the stockholders of
the Company within 12 months before or after the date the Plan is adopted by the
Committee. If such stockholder approval is obtained at a duly held stockholder's
meeting, it may be obtained by the affirmative vote of the holders of a majority
of the shares of Common Stock present at the meeting or represented and entitled
to vote thereon.

20.  Conditions Upon Issuance of Shares.
     ----------------------------------

     An Option shall not be exercisable, a share of Common Stock shall not be
issued pursuant to the exercise of an Option, and Restricted Stock shall not be
awarded until such time as the Plan has been approved by the Stockholders of the
Company and unless the award of Restricted Stock, exercise of such Option and
the issuance and delivery of such share pursuant thereto shall comply with all
relevant provisions of law, including, without limitation, the Securities Act,
the Exchange Act, the rules and regulations promulgated thereunder, and the
requirements of any stock exchange upon which the shares of Common stock may
then be listed, and shall be further subject to the approval of counsel for the
Company with respect to such compliance. As a condition to the exercise of an
Option, the Company may require the person exercising such Option to represent
and warrant at the time of any such exercise that the Common Stock is being
purchased only for investment and without any present intention to sell or
distribute such shares if, in the opinion of counsel for the Company, such a
representation is required by any of the aforementioned relevant provisions of
law.

                                     -12-
<PAGE>

21.  Effective Date and Termination of Plan.
     --------------------------------------

     (a) Effective Date.  This Plan is effective as of the later of the date of
its adoption by the Committee, or the date it is approved by the stockholders of
the Company, pursuant to Section 19.

     (b) Termination of the Plan.  The Committee may terminate the Plan at any
time with respect to any shares that are not then subject to Options or
Restricted Stock. Termination of the Plan will not affect the rights and
obligations of any Participant with respect to Options, SARs, Phantom Stock or
Restricted Stock awarded before termination.

                                     -13-<PAGE>

                                                                    Exhibit 10.4

                                IFX CORPORATION
                            2001 STOCK OPTION PLAN

          This IFX Corporation 2001 Stock Option Plan (this "Plan"), is hereby
                                                             ----
adopted by the Board of Directors of IFX Corporation, a Delaware corporation
(the "Company"), as of _________ __, 2001, subject to Section 9.8.
      -------

                                   ARTICLE I
                                PURPOSE OF PLAN

          The Plan is adopted by the Board for certain employees of the Company
and its Subsidiaries as a part of the compensation and incentive arrangements
for such employees. The Plan is intended to advance the best interests of the
Company by allowing such employees to acquire an ownership interest in the
Company, thereby motivating them to contribute to the success of the Company and
to remain in the employ of the Company and its Subsidiaries. The availability of
stock options under the Plan will also enhance the Company's ability to attract
and retain individuals of exceptional talent to contribute to the sustained
progress, growth and profitability of the Company.

                                  ARTICLE II
                                  DEFINITIONS

          For purposes of the Plan, except where the context clearly indicates
otherwise, the following terms shall have the meanings set forth below:

          "Affiliate" means, with respect to any Person, any other Person who,
           ---------
either directly or through one or more intermediaries, Controls, is Controlled
by or is under common Control with, such first Person.

          "Aggregate Exercise Price" has the meaning set forth in Section 7.2
           ------------------------
hereof.

          "Board" means the Board of Directors of the Company.
           -----

          "Cause" with respect to any Participant, means a termination of
           -----
employment of such Participant by the Company or any Subsidiary thereof due to
(a) commission of a felony; (b) material or repeated dishonesty or
misrepresentation involving the Company or any Subsidiary; (c) serious
misconduct in the performance or non-performance of Participant's
responsibilities as an employee, officer or director; (d) violation of a
material condition of employment; (e) unauthorized use of trade secrets or
confidential information; or (f) aiding a competitor of the Company or any
Subsidiary.

          "Change-in-Control" means the consummation of a transaction for
           -----------------
consideration consisting of cash or Unrestricted Marketable Securities, whether
in a single transaction or in a series of related transactions, that are
consummated contemporaneously (or consummated pursuant to contemporaneous
agreements), with an independent third party or a group of independent third
parties pursuant to which such party or parties (a) acquire more than 50% of the
outstanding voting
<PAGE>

stock of the Company determined on a Fully Diluted Basis, or (b) acquire assets
constituting all or substantially all of the assets of the Company and its
Subsidiaries on a consolidated basis (which shall be deemed the equivalent of
the acquisition of 100% of the voting stock of the Company on a Fully Diluted
Basis for the purposes hereof); provided, however, that if the consideration for
such transaction consists of restricted securities, a Change-in-Change shall be
deemed to be consummated at such time as at least 75% of such restricted
securities become Unrestricted Marketable Securities.

          "Code" means the Internal Revenue Code of 1986, as amended, and any
           ----
successor statute.

          "Committee" means the Compensation Committee or such other committee
           ---------
of the Board as the Board may designate to administer stock options granted by
the Company or, if for any reason the Board has not designated such a committee,
the Board.  The Committee, if other than the Board, shall be composed of two or
more directors as appointed from time to time by the Board.  At any time when
the Company is subject to the reporting requirements of Section 13 or Section
15(d) of the Securities Exchange Act, this Plan will be administered by the
Board or a committee of two or more directors who are "non-employee directors,"
within the meaning of Rule 16b-3 of the Securities Exchange Act.  At any time
that Section 162(m) of the Code is applicable to the Company, each such director
shall be an "outside director" within the meaning of Section 162 of the Code and
the regulations thereunder.

          "Common Stock" means the Company's common stock, par value $0.02 per
           ------------
share.

          "Company" has the meaning set forth in the preface.
           -------

          "Control" (including, with correlative meaning, all conjugations
           -------
thereof) means with respect to any Person, the ability of another Person to
control or direct the actions or policies of such first Person, whether by
ownership of voting securities, by contract or otherwise.

          "EBITDA" means, with respect to any Plan Year, consolidated earnings
           ------
of the Company and its Subsidiaries before interest, taxes, depreciation and
amortization (but excluding (i) the effect of earnout payments made in
connection with the acquisition of a business or enterprise approved by the
Board, (ii) any charges for non-cash employee compensation and (iii) any gains
or losses from investment income, including gains or losses for non-consolidated
Subsidiaries), all as calculated in accordance with generally accepted
accounting principles consistently applied, and as reflected in the Company's
consolidated financial statements for the four (4) fiscal quarters constituting
such Plan Year.

                                       2
<PAGE>

          "EBITDA Target" means, with respect to each Plan Year, the EBITDA
           -------------
Target set forth opposite such Plan Year in the following chart:

                           Plan Year      EBITDA Target
                           ---------      -------------

                              2001        $3.37 million
                              2002        $26.08 million
                              2003        $38.64 million
                              2004        $53.34 million

          The foregoing EBITDA Targets shall be subject to adjustment in the
event the Company shall at any time after the date hereof dispose of or acquire,
directly or indirectly, all or any substantial portion of a line of business,
corporation or other entity (whether by merger, purchase of stock or assets or
otherwise) by the Committee in such manner as it shall in good faith determine
to be necessary to take account of such disposition or acquisition, provided,
that such modifications shall not affect the status of Options which have
already vested and become exercisable.

          "Effective Date" has the meaning set forth in Section 9.8.
           --------------

          "Employee" means any full time employee of the Company or any of its
           --------
Subsidiaries,

          "Exercise Price" has the meaning set forth in Section 5.2(b) hereof.
           --------------

          "Fair Market Value" used in connection with the value of shares of
           -----------------
Common Stock means the average of the closing prices of the sales of Common
Stock on all securities exchanges on which the Common Stock 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 the Common Stock 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, or, if on any day the Common Stock 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 business days consisting of the day as of
which the Fair Market Value is being determined and the 20 consecutive business
days prior to such day.  If at any time the Common Stock is not listed on any
securities exchange or quoted in the NASDAQ System or the over-the-counter
market, the Fair Market Value shall be the fair value of the Common Stock
determined in good faith by the Committee (taking into account, if applicable,
in the discretion of the Committee, the minority status or illiquid nature of
the Common Stock).

          "Fully Diluted Basis" when used with respect to outstanding shares of
           -------------------
Common Stock, means all shares of Common Stock which are outstanding and which
would be outstanding assuming the exercise, conversion or exchange of (i) any
in-the-money rights, options or warrants to acquire Common Stock or any other
capital stock of the Company and (ii) any notes, debentures, shares of preferred
stock or other securities, options, warrants, or rights, which are convertible
or exercisable into, or exchangeable for, Common Stock or any other capital
stock of the Company.

                                       3
<PAGE>

          "Matured Shares" means, with respect to any Participant, Common Stock
           --------------
owned by such Participant for longer than six months.

          "Measurement Date" means the date on which any taxable income
           ----------------
resulting from the exercise of an Option is determined under applicable federal
income tax law.

          "Option Shares" means shares of Common Stock issuable upon the
           -------------
exercise of Options.

          "Options" means options to acquire shares of Common Stock granted in
           -------
accordance with Article V hereof.

          "Participant" means any Employee who is selected to participate in the
           -----------
Plan in accordance with Article III hereof.

          "Person" means an individual, a partnership, a corporation, a limited
           ------
liability company, an association, a joint stock company, a trust, a joint
venture, an unincorporated organization and a governmental entity or any
department, agency or political subdivision thereof.

          "Plan" has the meaning given to such term in the preface.
           ----

          "Plan Year" means any of the consecutive years ending December 31,
           ---------
2001, 2002, 2003 and 2004.

          "Securities Act" means the Securities Act of 1933, as amended.
           --------------

          "Securities Exchange Act" means the Securities Exchange Act of 1934,
           -----------------------
as amended.

          "Stock Option Agreement" has the meaning set forth in Section 5.3
           ----------------------
hereof.

          "Subsidiary" means, with respect to any specified Person, any other
           ----------
Person (a) whose board of directors or similar governing body, or a majority
thereof, may presently be directly or indirectly elected or appointed by such
specified Person, (b) whose management decisions and corporate actions are
directly or indirectly subject to the present control of such specified Person,
or (c) whose voting securities are more than 50% owned, directly or indirectly,
by such specified Person.

          "Target Price" means (i) with respect to a Change-in-Control
           ------------
transaction consummated on or prior to December 31, 2004, $13.25 per share of
Common Stock, (ii) with respect to a Change-in-Control transaction consummated
after December 31, 2004 but on or prior to December 31, 2005, $17.23 per share
of Common Stock, and (iii) with respect to a Change-in-Control transaction
consummated after December 31, 2005 but on or prior to June 30, 2006, $22.39 per
share of Common Stock, in each case, as adjusted for stock dividends, stock
splits, recombinations and the like.

                                       4
<PAGE>

          "Target Vested Options" has the meaning given to such term in Section
           ---------------------
6.2(b).

          "Termination Date" shall mean, with respect to a Participant, the date
           ----------------
upon which such Participant's employment with the Company and the Subsidiaries
is terminated.

          "Transfer" means, with respect to any Options or Option Shares, the
           --------
gift, sale, assignment, transfer, pledge, hypothecation or other disposition
(whether for or without consideration and whether voluntary, involuntary or by
operation of law) of such Option or Option Shares or any interest therein.

          "UBS" means UBS Capital Americas III, L.P., a Delaware limited
           ---
partnership and UBS Capital LLC, a Delaware limited liability company.

          "Unearned Options" means, as of the date of determination, Options
           ----------------
that (i) with respect to any completed Plan Year have failed to vest pursuant to
Section 6.2(a) because EBITDA for such Plan Year did not equal or exceed the
applicable EBITDA Target for such Plan Year or (ii) are not yet eligible for
vesting pursuant to Section 6.2(a).

          "Unrestricted Marketable Securities" means securities which are listed
           ----------------------------------
on a national securities exchange or quoted on the NASDAQ National Market System
and which are freely tradeable by the holder thereof without restriction
pursuant to an effective registration statement under the Securities Act or Rule
144(k) thereunder.

                                  ARTICLE III
                                ADMINISTRATION

          The Committee shall be responsible for the routine administration of
the Plan, subject to any rights of approval by preferred stockholders of the
Company and approval by the Board to meet any legal or regulatory requirements.
The Chief Executive Officer of the Company shall recommend Participants and
award levels to the Committee. Subject to the requirements and the limitations
of the Plan, the Committee shall have the responsibility and authority to: (a)
approve the award of Options under this Plan; (b) interpret the Plan and adopt,
amend and rescind administrative guidelines and other rules and regulations
relating to the Plan; (c) correct any defect or omission or reconcile any
inconsistency in the Plan or in any Option granted hereunder; and (d) make all
other determinations and take all other actions necessary or advisable for the
implementation and administration of the Plan, including actions necessary or
advisable in connection with the grant of Options. The Committee's
determinations on matters within its authority shall be conclusive and binding
upon the Participants, the Company and all other Persons. All expenses
associated with the administration of the Plan shall be borne by the Company.
Notwithstanding the foregoing, recipients of Options, the number of Options and
the type of Options (whether incentive stock options or non-qualified options)
granted to each such recipient shall be subject to the approval of UBS.

                                       5
<PAGE>

                                  ARTICLE IV
                     LIMITATION ON AVAILABLE OPTION SHARES

          4.1  Option Shares. The aggregate number of shares of Common Stock
               -------------
with respect to which Options may be granted under the Plan shall not exceed
[1,290,113] shares.

          4.2  Status of Option Shares. The shares of Common Stock for which
               -----------------------
Options may be granted under the Plan may be either authorized and unissued
shares, treasury shares or a combination thereof, as the Committee shall
determine and shall be reserved by the Committee for issuance as provided in the
Plan.  To the extent any Options are not awarded under the Plan, the Option
Shares reserved for issuance in respect thereof shall upon termination of the
Plan become available for issuance for any purpose that the Board, in its
discretion, determines.  To the extent any outstanding Options expire or are
terminated prior to exercise, the Option Shares in respect of which such Options
were issued shall be available for reissuance pursuant to this Plan.

                                   ARTICLE V
                               GRANT OF OPTIONS

          5.1  Options. The Committee may grant options to Participants in
               -------
accordance with this Article V from time to time, subject to the last sentence
of Article III.

          5.2  Form of Options; Exercise Price; Exercisability.
               -----------------------------------------------

          (a)  Options granted under this Plan may be options that are intended
to be "incentive stock options" within the meaning of Section 422(b) of the Code
or any successor provisions ("ISOs"), and "non-qualified" options that are not
so intended. The grant and terms of any Option intended to be an ISO shall be
subject to the provisions of the Code and any regulation thereunder governing
ISOs.

          (b)  The exercise price of each ISO granted pursuant to this Plan
shall be the greater of Fair Market Value on the date of grant and $3.50 per
share, and of each non-qualified option granted pursuant to this Plan shall be
$3.50 per Option Share (the "Exercise Price").
                             --------------

          (c)  Options shall be exercisable upon vesting (as determined pursuant
to Article VI).

          5.3  Stock Option Agreement . Each Option granted hereunder shall be
               ----------------------
embodied in a written agreement substantially in the form attached hereto as
Exhibit A (a "Stock Option Agreement") which shall be signed by the Participant
---------     ----------------------
to whom the Option is granted and shall be subject to the terms and conditions
set forth herein.  For purposes of the Plan, no Option shall be deemed to be
outstanding until it has been granted to a Participant by the Committee and a
Stock Option Agreement has been executed and delivered by the Company and the
Participant and an Option shall cease to be outstanding when it terminates or is
exercised pursuant to the Plan.

                                       6
<PAGE>

                                  ARTICLE VI
                              VESTING OF OPTIONS

          6.1  Exercisability; Continuous Employment. Options issued pursuant to
               -------------------------------------
this Plan may be exercised only to the extent that they have vested. All Options
awarded under the Plan will vest as set forth in Section 6.2 below, provided, in
each case, that the Participant remains continuously employed with the Company
or its Subsidiaries from the date of award through the date of determination.

          6.2  Vesting of Options.  All Options held by a Participant will vest
               ------------------
on June 30, 2006, subject to accelerated vesting as follows:

          (a)  Not later than 90 days after the end of each Plan Year, the
Committee shall determine the EBITDA for such Plan Year. No Options will vest
for any Plan Year in which EBITDA is less than the applicable EBITDA Target for
such Plan Year. If EBITDA for a given Plan Year equals or exceeds the EBITDA for
such Plan Year, Options representing 25% of such Participant's Options will vest
as of the last day of such Plan Year.

          (b)  Upon a Change-in-Control where the consideration received is
valued (as of the date of consummation of such Change-in-Control) at a price per
share of Common Stock greater than or equal to the Target Price, a number of
Unearned Options held by a Participant shall vest and become immediately
exercisable, which number shall equal the product (such product, the "Target
                                                                      ------
Vested Options") of (i) total number of Unearned Options held by such
--------------
Participant multiplied by (ii) the quotient of (x) the number of shares of
            ---------- --
Common Stock on a Fully Diluted Basis sold in such transaction divided by (y)
                                                               ------- --
the number of shares of Common Stock on a Fully Diluted Basis outstanding
immediately prior to the consummation of such transaction.

          (c)  Upon a Change-in-Control where the consideration received is
valued (as of the date of consummation of such Change-in-Control) at a price per
share of Common Stock less than the Target Price, a number of Unearned Options
held by a Participant shall vest and become immediately exercisable, which
number shall equal (i) the Target Vested Options multiplied by (ii) the quotient
                                                 ---------- --
of (x) the actual price per share of Common Stock achieved in such transaction
divided by (y) the Target Price.
------- --

          (d)  Notwithstanding the foregoing, all Options which vest as a result
of a Change-in-Control in accordance with paragraph (b) or (c) and any proceeds
to which any Participant is entitled in connection with such Change-in-Control
in respect of such Options shall be subject to forfeiture if such Participant
does not remain employed by the Company (or its successor) or any Subsidiary
thereof until the earlier to occur of (i) one (1) year after consummation of the
Change-in-Control transaction or (ii) the length of time requested by the
purchaser. All proceeds to which any Participant is entitled in connection with
such Change-in-Control in respect of such Options shall be placed in escrow
pending satisfaction of the conditions set forth in this Section 6.2(d). The
engagement of the escrow agent and the escrow agreement shall be on customary
terms and conditions, as determined in good faith by the Board, and the expenses
thereof shall be paid by the Company.

                                       7
<PAGE>

          (e)  Any Options which do not vest in accordance with paragraph (b) or
(c) upon a Change-in-Control shall continue to be subject to the vesting
provisions set forth in this Section 6.2.

          6.3  Termination of Employment.  All Options held by a Participant who
               -------------------------
ceases for any reason to be employed by the Company and its Subsidiaries will
cease to vest as of the Termination Date.

                                  ARTICLE VII
                              EXERCISE OF OPTIONS

          7.1  Right to Exercise.  During the Participant's lifetime, only the
               -----------------
Participant or the Participant's transferee pursuant to a Transfer permitted
under Section 9.6 hereof (a "Permitted Transferee") may exercise the Options.
In the event of the Participant's death, the Options may be exercised only (i)
by the executor or administrator of the Participant's estate or the Person or
Persons to whom the Participant's rights under the Options shall pass by will or
the laws of descent and distribution (provided that each beneficiary shall
execute and deliver an undertaking in writing to be bound by the terms of a
Stock Option Agreement in form and substance acceptable to the Committee), (ii)
by a Permitted Transferee and (iii) to the extent that the Participant was
entitled to exercise such Options hereunder at the date of the Participant's
death.

          7.2  Procedure for Exercise.  Any Participant or Permitted Transferee
               ----------------------
(or his/her legal representative) may exercise all or any portion of any Options
held by such Participant or Permitted Transferee, to the extent they have vested
pursuant to Article VI and are outstanding, at any time and from time to time
prior to its expiration, by completing, signing and delivering to the Company
(i) a notice of exercise substantially in the form attached hereto as Exhibit B
                                                                      ---------
(the "Exercise Notice") and (ii) an amount in cash (including check, bank draft
      ---------------
or money order) equal to the product of (A) the Exercise Price multiplied by (B)
the number of Option Shares to be acquired (the "Aggregate Exercise Price").
                                                 ------------------------
Notwithstanding the foregoing, if a Participant or Permitted Transferee owns
Matured Shares with a Fair Market Value as of the date of receipt by the Company
of the Exercise Notice (the "Calculation Date") exceeding the Aggregate Exercise
Price in connection with such exercise, such Participant or Permitted Transferee
may, in lieu of paying the Aggregate Exercise Price in cash, deliver an Exercise
Notice accompanied by the certificate for the Matured Shares (duly executed) and
indicate in such Exercise Notice that such Participant or Permitted Transferee
intends to effect a cashless exercise thereof and be entitled to receive, in
respect of the exercise of the Option and the cancellation of Matured Shares
with an aggregate Fair Market Value as of the Calculation Date equal to the
Aggregate Exercise Price, (x) the number of Option Shares that otherwise would
be issued hereunder if the Aggregate Exercise Price were paid in cash and (y)
the number of Matured Shares with an aggregate Fair Market Value equal to the
excess of the aggregate Fair Market Value as of the Calculation Date of the
Matured Shares before such cashless exercise minus the Aggregate Exercise Price.
Notwithstanding anything in this Section 7.2 to the contrary, in the event that
any Stock Option Agreement representing Options granted to a Participant is
lost, stolen or destroyed, the Participant or Permitted Transferee may, in lieu
of delivering such Stock Option Agreement at the time of exercise, deliver an
affidavit as to its loss, theft or destruction and any indemnity that the

                                       8
<PAGE>

Company may reasonably request. A Participant's or Permitted Transferee's right
to exercise the Option shall be subject to the satisfaction of all conditions
set forth in the Exercise Notice. If a Participant or Permitted Transferee
exercises any Options for less than all of the Option Shares covered by the
relevant Stock Option Agreement, the Company shall issue a new Stock Option
Agreement to such Participant or Permitted Transferee in respect of the portion
of such Option remaining unexercised.

          7.3  Securities Laws Restrictions on Transfer of Option Shares. Each
               ---------------------------------------------------------
Participant exercising an Option will be required to represent to the Company in
the Exercise Notice that when such Participant exercises his or her Option such
Participant will be purchasing Option Shares for his or her own account for
investment and not on behalf of others or otherwise with a view toward
distributing them. Each Participant is advised that federal and state securities
laws govern and restrict each Participant's right to Transfer, or offer to
Transfer, any Option Shares unless such Participant's Transfer, or offer to
Transfer, is registered under the Securities Act and state securities laws, or
such Transfer, or offer to Transfer, is exempt from registration or
qualification thereunder. Each Participant is further advised that the
certificates for any Option Shares issued in connection with such exercise will
bear such legends as the Company deems necessary or desirable in connection with
the Securities Act or other rules, regulations or laws.

          7.4  Withholding Tax Requirements.
               ----------------------------

          (a)  Amount of Withholding. It shall be a condition of the exercise of
               ---------------------
any Option that the Participant exercising the Option make appropriate payment
or other provision acceptable to the Company with respect to any withholding tax
requirement arising from such exercise. The amount of withholding tax required,
if any, with respect to any Option exercise (the "Withholding Amount") shall be
                                                  ------------------
determined by a financial or other appropriate officer of the Company, and the
Participant shall furnish such information and make such representations as such
officer requires to make such determination.

          (b)  Withholding Procedure. If the Company determines that withholding
               ---------------------
tax is required with respect to any Option exercise, the Company shall notify
the Participant of the Withholding Amount, and the Participant shall pay to the
Company an amount not less than the Withholding Amount. In lieu of making such
payment, the Participant may elect to pay the Withholding Amount by delivering
to the Company a number of Matured Shares having an aggregate Fair Market Value
as of the Measurement Date not less than the Withholding Amount. Any fractional
share interests resulting from the delivery of Shares to meet withholding tax
requirements shall be settled in cash. All amounts paid to or withheld by the
Company and the value of all Common Stock delivered to the Company pursuant to
this Section 7.4 shall be deposited in accordance with applicable law by the
Company as withholding tax for the Participant's account. If the Treasurer or
other appropriate officer of the Company determines that no withholding tax is
required with respect to the exercise of any Option, but subsequently it is
determined that the exercise resulted in taxable income as to which withholding
is required (as a result of a disposition of shares or otherwise), the
Participant shall promptly, upon being notified of the withholding requirement,
pay to the Company, by means acceptable to the Company, the amount required to
be withheld.

                                       9
<PAGE>

          7.5  Listing, Registration and Compliance with Laws and Regulations.
               --------------------------------------------------------------
Options shall be subject to the requirement that if at any time the Committee
shall make a good faith determination that the listing, registration or
qualification of Option Shares upon any securities exchange or under any state
or federal securities or other law or regulation, or the consent or approval of
any governmental regulatory body, is necessary or desirable as a condition to or
in connection with the granting of the Options or the issuance or purchase of
Option Shares thereunder, no Options may be granted or exercised, in whole or in
part, unless such listing, registration, qualification, consent or approval
shall have been effected or obtained free of any conditions not reasonably
acceptable to the Committee. The Company shall in good faith, and to the extent
consistent with its reasonable business judgment, exercise all reasonable
efforts to obtain any such listing, registration, qualification or approval. The
holders of such Options will supply the Company with such certificates,
representations and information as the Company shall request and shall otherwise
cooperate with the Company in obtaining such listing, registration,
qualification, consent or approval.

                                  ARTICLE VII
                             EXPIRATION OF OPTIONS

          8.1  Expiration Date. In no event shall any part of any Option be
               ---------------
exercisable after 5:00 p.m. Eastern Standard Time on the tenth (10th)
anniversary of the grant date (the "Expiration Date").
                                    ---------------

          8.2  Accelerated Expiration: Termination of Employment. Any part of
               --------------------------------------------------
any Option that was not vested on a Participant's Termination Date shall expire
and be forfeited on such date, and any part of any Option that was vested on the
Termination Date shall also expire and be forfeited to the extent not
theretofore exercised within ninety (90) days following the Termination Date,
but in no event after the Expiration Date; provided, that if a Participant's
employment with the Company or any Subsidiary is terminated by the Company or
such Subsidiary for Cause, then any part of any Option held by such Participant
that was vested on the Termination Date shall expire and be terminated on such
date.

                                  ARTICLE IX
                                 MISCELLANEOUS

          9.1  Rights of Participants. Nothing in this Plan shall interfere with
               ----------------------
or limit in any way any right of the Company or any of its Subsidiaries to
terminate any Participant's employment at any time, nor confer upon any
Participant any right to continued employment by the Company or any of its
Subsidiaries for any period of time or to continue such Participant's present
(or any other) rate of compensation. Transfer of an Employee from the Company to
a Subsidiary, from a Subsidiary to the Company and from one Subsidiary to
another shall not be considered a termination of such Employee's employment for
purposes of this Plan. No employee shall have a right to be selected as a
Participant or, having been so selected, to be selected again as a Participant.

                                       10
<PAGE>

          9.2  Supplementation, Amendment, Suspension and Termination of Plan.
               --------------------------------------------------------------
The Committee reserves the right to suspend, terminate, amend, modify or
supplement the Plan in any manner, provided that the Committee may not suspend,
terminate or materially amend, modify or supplement the Plan or any portion
thereof at any time (i) without the consent of Participants who hold a majority
of the Option Shares issued or issuable pursuant to Options which would be
adversely affected by such suspension, termination, amendment, modification or
supplement, (ii) without the consent of UBS and (iii) without such greater or
other stockholder approval to the extent such approval is required by law,
agreement or the rules of any exchange upon which capital stock of the Company
is listed.

          9.3  Adjustments. In the event of a reorganization, recapitalization,
               -----------
stock dividend, stock  split, share combination or other change in the shares of
Common Stock, the Committee shall make such adjustments in the number and type
of shares authorized by the Plan, the number and type of shares covered by
outstanding Options and the Exercise Prices specified therein and other
amendments to the Plan as the Committee, in good faith, determines to be
appropriate and equitable in order to prevent the dilution or enlargement of the
rights granted hereunder or under any outstanding Options.

          9.4  Construction of Plan. The validity, construction, interpretation,
               --------------------
administration and effect of the Plan shall be determined in accordance with the
local law, and not the law of conflicts, of the State of Delaware.

          9.5  Indemnification. The Company will, and will cause each of its
               ---------------
Subsidiaries to, indemnify the members of the Committee against all costs and
expenses reasonably incurred by them in connection with any action, suit or
proceeding to which they or any of them may be a party by reason of any action
taken or failure to act under or in connection with the Plan or any Option
granted thereunder or any Option Shares issued pursuant to the exercise of an
Option, and against all amounts paid by them in settlement thereof (provided
such settlement is approved by independent legal counsel selected by the
Company) or paid by them in satisfaction of a judgment in any such action, suit
or proceeding; provided, however, that any such Person shall be entitled to the
indemnification rights set forth in this Section 9.5 only if such Person has
acted in good faith and in a manner that such Person reasonably believed to be
in or not opposed to the best interests of the Company and, with respect to any
criminal action or proceeding, had no reasonable cause to believe that such
conduct was unlawful, and , provided, further that upon the institution of any
such action, suit or proceeding such Person shall give the Company written
notice thereof and an opportunity, at its own expense, to handle and defend the
same before such Person undertakes to handle and defend it on his or her own
behalf.

          9.6  Options Not Transferrable. Options are personal to each
               -------------------------
Participant and are not Transferable by a Participant other than: (i) by will or
the laws of descent and distribution; (ii) pursuant to a domestic relations
order of a court of competent jurisdiction; or (iii) by transfer for estate
planning purposes; provided that no Transfer shall be permitted if the issuance
of Option Shares upon exercise of Options by the Transferee would not be
eligible for registration on Form S-8 under the Securities Act.

                                       11
<PAGE>

          9.7  Stockholder Approval. Effectiveness of the Plan shall be subject
               --------------------
to approval by the stockholders of the Company within 12 months before or after
the date the Plan is adopted by the Board, such approval to be in accordance
with applicable laws, the Company's certificate of incorporation and by-laws and
stock exchange listing requirements.

          9.8  Effective Date of Plan. This Plan shall be effective (the
               ----------------------
"Effective Date") on the later of the date it is approved by the stockholders of
---------------
the Company pursuant to Section 9.7 and the Closing (as defined in the Stock
Purchase Agreement dated March __, 2001 by and between the Company and UBS).

                           [END OF TEXT OF DOCUMENT]

                                       12
<PAGE>

                                                                       Exhibit A
                                                                       ---------

                        FORM OF STOCK OPTION AGREEMENT
                        ------------------------------

          THIS STOCK OPTION AGREEMENT (this "Agreement") is made as of
                                             ---------
[_________________], by and between IFX Corporation, a Delaware corporation (the
"Company"), and the individual named on the signature page hereto (the
 -------
"Executive").  Capitalized terms used but not otherwise defined herein shall
----------
have the meanings assigned to such terms in the IFX Corporation 2001 Stock
Option Plan (the "Plan").
                  ----

          WHEREAS, the Executive is currently a management employee of the
Company and/or one or more of its Subsidiaries, and the Company desires to grant
the Executive certain stock purchase options in accordance with the terms hereof
pursuant to the Plan, for the purposes set forth in the Plan.

          WHEREAS, the Company and the Executive desire to enter into an
agreement which shall provide for the repurchase of the Option Shares in certain
situations.

          NOW, THEREFORE, in order to implement the foregoing and in
consideration of the mutual representations, warranties, covenants and
agreements contained herein, the parties hereto agree as follows:

     1.   Certain Defined Terms. As used in this Agreement, the following terms
          ---------------------
shall have the meanings set forth or as referenced below:

          "Agreement" shall have the meaning set forth in the preface.
           ---------

          "Cause" used in connection with the termination of employment of the
           -----
Executive shall mean a termination of employment of the Executive by the Company
or any Subsidiary thereof due to (a) commission of a felony; (b) material or
repeated dishonesty or misrepresentation involving the Company or any
Subsidiary; (c) serious misconduct in the performance or non-performance of
Participant's responsibilities as an employee, officer or director; (d)
violation of a material condition of employment; (e) unauthorized use of trade
secrets or confidential information; or (f) aiding a competitor of the Company
or any Subsidiary.

          "Common Stock" shall mean the Company's common stock, par value $0.02
           ------------
per share.

          "Company" shall have the meaning set forth in the preface.
           -------

          "Cost" shall mean, with respect to Option Shares, the price per share
           ----
paid by the Executive (as proportionately adjusted for all subsequent stock
splits, stock dividends and other recapitalizations) for such Option Shares.

          "Disability" used in connection with the termination of employment of
           ----------
the Executive shall mean the inability of the Executive to perform the essential
functions of Executive's job, with
<PAGE>

or without reasonable accommodation, by reason of a physical or mental
infirmity, for a continuous period of six months as determined in good faith by
the Board, provided, that such six-month period shall be deemed continuous
unless Executive returns to work for at least 30 consecutive business days
during such period and performs during such period at the level and competence
that existed prior to the beginning of the six-month period. The date of such
Disability shall be on the first day of such six-month period. In connection
with the Board's determination as to whether the Executive is under a
Disability, the Executive shall, as reasonably requested by the Board, (i) make
himself available for medical examinations by one or more physicians chosen by
the Board and (ii) grant to the Board and any such physicians access to all
relevant medical information concerning him, arrange to furnish copies of his
medical records to the Board and use his best efforts to cause his own
physicians to be available to discuss his health with the Board.

          "Executive" shall have the meaning set forth in the preface.
           ---------

          "Executive Group" shall mean, collectively, Executive and Executive's
           ---------------
Permitted Transferees.

          "Exercise Price" shall have the meaning set forth in Section 2.1.
           --------------

          "Grant Date" shall have the meaning given to such term in Section 2.1
           ----------
hereof.

          "Matured Shares" means Common Stock owned by Executive for longer than
           --------------
six months.

          "Option Shares" shall mean shares of Common Stock issuable upon the
           -------------
exercise of Options.

          "Permitted Transferee" shall mean any Person to whom any Option is
           --------------------
transferred in a transfer permitted under Section 2.4 hereof.

          "Qualified Public Offering" means an underwritten public offering of
           -------------------------
shares of Common Stock for which the Company has obtained a firm commitment from
one or more underwriter(s) for at least $60 million of Common Stock and in which
the Company receives gross proceeds from the sale of Common Stock to the public
of at least $45 million (before deduction of underwriter's discounts and
commissions), and which values the equity of the Company at not less than $200
million pre-offering.

          "Subsidiary" means, with respect to any specified Person, any other
           ----------
Person (a) whose board of directors or similar governing body, or a majority
thereof, may presently be directly or indirectly elected or appointed by such
specified Person, (b) whose management decisions and corporate actions are
directly or indirectly subject to the present control of such specified Person,
or (c) whose voting securities are more than 50% owned, directly or indirectly,
by such specified Person.

                                      A-2
<PAGE>

          "UBS" shall mean UBS Capital Americas III, L.P., UBS Capital LLC and
           ---
their successors and assigns.

     2.   Options.
          -------

          2.1  Grant of Options. The Company hereby grants to Executive, as of
               ----------------
the date hereof (the "Grant Date"), the option to purchase up to [__] Option
                      ----------
Shares, all at the exercise price specified in the Plan (the "Exercise Price"),
                                                              --------------
subject to the terms and conditions set forth herein.  All rights of the
Executive as the holder of the Options issued hereunder shall be solely
determined by the provisions of the Plan and this Agreement.  All Options
granted pursuant to this Agreement will expire as provided in Article VIII of
the Plan.

          2.2  Form of the Options. Options granted under this Plan shall be
               -------------------
[non-qualified stock options] [incentive stock options within the meaning of
Section 422(b) of the Code or any successor provisions].

          2.3  Exercise of Options. All Options granted pursuant to this
               -------------------
Agreement may be exercised as provided in Article VII of the Plan solely to the
extent vested in accordance with Article VI of the Plan.

          2.4  Non-Transferability of Options. The Executive's Options are
               ------------------------------
personal to the Executive and are not transferable by the Executive other than
by will or the laws of descent and distribution or pursuant to a domestic
relations order of a court of competent jurisdiction.

          2.5  Adjustments upon Changes in Capitalization. The number of Option
               ------------------------------------------
Shares which may be issued pursuant to the exercise of Options shall be
equitably adjusted for any stock dividend, stock split, recapitalization,
merger, consolidation or other recapitalization as provided in Section 9.3 of
the Plan.

     3.   Certain Sales Upon Termination of Employment.
          --------------------------------------------

          3.1  Call Options. If the Company ceases to have any class of
               ------------
securities registered under Section 12(b) or 12(g) of the Securities Exchange
Act of 1934, as amended, then:

               (a)  If the Executive's employment with the Company or any of its
subsidiaries terminates for any of the reasons set forth in clause (i), (ii) or
(iii) below  prior to a Qualified Public Offering, the Company shall have the
right and option to purchase, for a period of 90 days following the date of such
termination of employment of the Executive, and each member of the Executive
Group shall be required to sell to the Company, any or all of the Option Shares
then held by such member of the Executive Group, at a price per share equal to
the applicable purchase price determined pursuant to Section 3.2(c):

                    (i) if the Executive's employment with the Company or its
     Subsidiaries is terminated due to the Disability or death of the Executive;

                                      A-3
<PAGE>

                    (ii)  if the Executive's employment with the Company or its
     Subsidiaries is terminated (A) by the Company or its Subsidiaries without
     Cause; or (B) by the Executive for any reason; or

                    (ii)  if the Executive's employment with the Company or its
     Subsidiaries is terminated by the Company or any of its Subsidiaries for
     Cause.

               (b)  If the Company desires to exercise its option to purchase
any Option Shares pursuant to this Section 3.1, the Company shall, not later
than ninety (90) days after the date of termination of Executive's employment,
send written notice to the Executive of its intention to purchase shares,
specifying the number of shares to be purchased (the "Call Notice"). Subject to
                                                      -----------
the next sentence, the closing of the purchase and sale shall take place at the
principal office of the Company on a date specified by the Company no later than
the sixtieth (60th) day after the giving of the Call Notice. Notwithstanding the
foregoing, the closing with respect to any shares which are not Matured Shares
shall be delayed at the option of the Company until a date no later than the
10th day after the 180th day following acquisition by the Executive of such
shares.

               (c)  In the event of a purchase by the Company pursuant to (1)
Section 3.2(a)(i) or (a)(ii), the purchase price for the Option Shares shall be
a price per Option Share equal to the Fair Market Value thereof (measured as of
the date of the Call Notice, or, with respect to shares which are not Matured
Shares, the closing of the purchase and sale), and (2) Section 3.2(a)(iii), the
purchase price for the Option Shares shall be a price per share equal to Cost.

               3.2  Obligation to Sell. In the event there is more than one
                    ------------------
member of the Executive Group, the failure of any one member thereof to perform
its obligations hereunder shall not excuse or affect the obligations of any
other member thereof, and the closing of the purchases from such other members
by the Company shall not excuse, or constitute a waiver of its rights against,
the defaulting member.

     4.   Miscellaneous.
          -------------

          4.1  Executive's Employment by the Company. Nothing in this Agreement
               -------------------------------------
shall interfere with or limit in any way any right of the Company or any of its
Subsidiaries to terminate Executive's employment at any time, nor confer upon
Executive any right to continued employment by the Company or any of its
Subsidiaries for any period of time or to continue such Executive's present (or
any other) rate of compensation. Transfer of Executive from the Company to a
Subsidiary, from a Subsidiary to the Company and from one Subsidiary to another
shall not be considered a termination of such Executive's employment for
purposes of this Agreement.

          4.2  Binding Effect. The provisions of this Agreement shall be
               --------------
binding upon and accrue to the benefit of the parties hereto and their
respective heirs, legal representatives, successors and assigns; provided,
however, that no transferee shall derive any rights under this Agreement unless
and until such transferee has executed and delivered to the Company a valid
undertaking and becomes bound by the terms of this Agreement.

                                      A-4
<PAGE>

          4.3  Amendment; Waiver.  This Agreement may be amended only by a
               -----------------
written instrument signed by the parties hereto or in accordance with Section
9.2 of the Plan.  No waiver by any party hereto of any of the provisions hereof
shall be effective unless set forth in a writing executed by the party so
waiving.

          4.4  Governing Law. This Agreement shall be governed by and construed
               -------------
and enforced in accordance with the laws of the State of Delaware without regard
to the conflicts of law principles thereof.

          4.5  Notices.  All notices and other communications hereunder shall be
               -------
in writing and shall be deemed to have been duly given when personally
delivered, telecopied (with confirmation of receipt), one day after deposit with
a reputable overnight delivery service (charges prepaid) and three days after
deposit in the U.S. Mail (postage prepaid and return receipt requested) to the
address set forth below or such other address as the recipient party has
previously delivered notice to the sending party.

               (a)  If to the Company:

                    IFX Corporation
                    ______________________
                    ______________________
                    FAX:  ________________
                    Attention:  Chief Executive Officer

               (b)  If to the Executive, to the address as shown on the stock
register of the Company.

          4.6  Integration.  This Agreement, the Plan and the documents referred
               -----------
to herein or delivered pursuant hereto which form a part hereof contain the
entire understanding of the parties with respect to the subject matter hereof
and thereof.  There are no restrictions, agreements, promises, representations,
warranties, covenants or undertakings with respect to the subject matter hereof
other than those expressly set forth herein and therein.  This Agreement
supersedes all prior agreements and understandings between the parties with
respect to such subject matter.

          4.7  Counterparts.  This Agreement may be executed in separate
               ------------
counterparts, and by different parties on separate counterparts each of which
shall be deemed an original, but all of which shall constitute one and the same
instrument.

          4.8  Injunctive Relief.  The Executive and Executive's Permitted
               -----------------
Transferees each acknowledges and agrees that a violation of any of the terms of
this Agreement will cause the Company irreparable injury for which adequate
remedy at law is not available.  Accordingly, it is agreed that the Company
shall be entitled to an injunction, restraining order or other equitable relief
to prevent breaches of the provisions of this Agreement and to enforce
specifically the terms and provisions hereof in any court of competent
jurisdiction in the United States or any state thereof, in addition to any other
remedy to which it may be entitled at law or equity.

                                      A-5
<PAGE>

          4.9  Rights Cumulative; Waiver.  The rights and remedies of the
               -------------------------
Executive and the Company under this Agreement shall be cumulative and not
exclusive of any rights or remedies which either would otherwise have hereunder
or at law or in equity or by statute, and no failure or delay by either party in
exercising any right or remedy shall impair any such right or remedy shall
impair any such right or remedy or operate as a waiver of such right or remedy,
nor shall any single or partial exercise of any power or right preclude such
party's other or further exercise or the exercise of any other power or right.
The waiver by any party hereto of a breach of any provision of this Agreement
shall not operate or be construed as a waiver of any preceding or succeeding
breach and no failure by either party to exercise any right or privilege
hereunder shall be deemed a waiver of such party's rights or privileges
hereunder or shall be deemed a waiver of such party's rights to exercise the
same at any subsequent time or times hereunder.

          4.10 Conflict with the Plan.  In the event of any conflict or
               ----------------------
inconsistency between the provisions of this Agreement and the Plan, the
provisions of the Plan shall control.

                           *     *     *     *     *

                                      A-6
<PAGE>

          IN WITNESS WHEREOF, the parties have executed this Stock Option
Agreement as of the date first above written.

                         IFX CORPORATION

                         By:__________________________________________
                         Name:
                         Title:

                         _____________________________________________
                                           [Executive]

                                      A-7
<PAGE>

                               CONSENT OF SPOUSE
                               -----------------

          The undersigned spouse of Executive hereby acknowledges that I have
read the foregoing Stock Option Agreement (the "Agreement") and that I
                                                ---------
understand its contents.  I agree that my spouse's interest in such Option
Shares is subject to the Agreement and any interest I may have in such Option
Shares shall be irrevocably bound by the Agreement and further that my community
property interest, if any, shall be similarly bound by the Agreement.

          I am aware that the legal, financial and other matters contained in
the Agreement are complex and I am free to seek advice with respect thereto from
independent counsel.  I have either sought such advice or determined after
carefully reviewing the Agreement that I will waive such right.

                              _____________________________________
                              Name:________________________________

                              _____________________________________
                                                   Witness
<PAGE>

                                                                       Exhibit B
                                                                       ---------

                                EXERCISE NOTICE
                                ---------------

          This Exercise Notice (this "Notice") is given by the undersigned
                                      ------
participant ("Participant") to IFX Corporation, a Delaware corporation (the
              ------------
"Company"), in connection with the Participant's exercise of certain Options
--------
granted pursuant to the Company's 2001 Stock Option Plan (the "Plan") to
                                                               ----
purchase Option Shares (as defined in the Plan).  Capitalized terms used but not
defined herein shall have the respective meanings ascribed to them in the Plan.

          1.   Purchase and Sale of Option Shares.
               ----------------------------------

               a.  Upon delivery to the Company of this Notice and the Stock
     Option Agreement to which it relates, the Company will sell and issue to
     Participant, the Option Shares that Participant elects to purchase
     hereunder.  Participant will deliver to the Company herewith the aggregate
     Exercise Price for the Option Shares purchased hereunder (if payable in
     cash) by check, bank draft or money order made payable to "IFX
     Corporation."

               b.  In connection with the purchase and sale of the Option Shares
     hereunder, Participant represents and warrants to the Company that:

          i.   The Option Shares to be acquired by Participant pursuant to
               Participant's exercise of the Option will be acquired for
               Participant's own account and not with a view to, or intention
               of, distribution thereof in violation of the Securities Act, or
               any applicable state securities laws, and the Option Shares will
               not be disposed of in contravention of the Securities Act or any
               applicable state securities laws;

          ii.  Participant is sophisticated in financial matters and is able to
               evaluate the risks and benefits of the investment in the Option
               Shares;

          iii. Participant is able to bear the economic risk of his or her
               investment in the Option Shares for an indefinite period of time
               and, acknowledges that the Options Shares cannot be sold unless
               subsequently registered under the Securities Act or an exemption
               from such registration is available;

          iv.  Participant has had an opportunity to ask questions and receive
               answers concerning the terms and conditions of the Option Shares
               and has had full access to such other information concerning the
               Company as he or she has requested; and

          v.   Participant is a resident and domiciliary of the state or other
               jurisdiction hereinafter set forth opposite such Participant's
               signature and Participant has no present intention of becoming a
               resident of any other state or jurisdiction. If Participant is a
               resident and domiciliary of a state that requires the Company to
               ascertain certain other information regarding the Participant,
               the
<PAGE>

               Company may attach a page to this Notice containing additional
               representations to be made by Participant in connection with such
               Participant's investment in Option Shares, and by signing this
               Notice, Participant shall be deemed to have made such additional
               representations to the Company.

               c.  Participant further acknowledges and agrees that:

          i.   neither the issuance of the Option Shares to Participant nor any
               provision contained herein shall entitle Participant to remain in
               the employment of the Company and its Subsidiaries or affect any
               right of the Company to terminate Participant's employment at any
               time for any reason;

          ii.  the Company shall have no duty or obligation to disclose to
               Participant and Participant shall have no right to be advised of,
               any material information regarding the Company and its
               Subsidiaries in connection with the repurchase of Option Shares
               upon the termination of Participant's employment with the Company
               and its Subsidiaries or as otherwise provided hereunder; and

          iii. the Company shall be entitled to withhold from participant from
               any amounts due and payable by the Company to Participant (or
               secure payment from Participant in lieu of withholding) the
               amount of any withholding or other tax due from the Company with
               respect to such Option Shares and the Company may defer issuance
               until indemnified to its satisfaction.

               d.  The Company and Participant acknowledge and agree that the
     Option Shares issued in connection herewith hereunder, are issued as a part
     of the compensation and incentive arrangements between the Company and
     Participant.

          2.   Restriction on Option Shares.  Participant acknowledges that the
               ----------------------------
Option Shares being purchased hereunder are being issued pursuant to the Plan,
the terms and conditions of which are incorporated herein as if set forth fully
herein.

                             *    *    *    *    *

                                      B-2
<PAGE>

     IN WITNESS WHEREOF, the Participant has executed this Notice as of the date
written below.

No. of Option Shares:                          ___________________

Aggregate Exercise Price Therefor:             ___________________

Cashless Exercise:                             Yes ____     No____

______________________________         ___________________
Signature of Participant               Date

______________________________         ________________________________
Print Participant's Name               Participant's Social Security No.

Participant's Residence Address:       Mailing Address (if different):

______________________________         ________________________________
Street                                 Street

______________________________         ________________________________
City State          Zip Code           City State          Zip Code

Acknowledged Receipt of Notice as of ___________________________.

IFX CORPORATION

By: __________________________

Its:___________________________

                                      B-3

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