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Certificate of Incorporation - Birch Telecom Inc.

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                                    RESTATED

                          CERTIFICATE OF INCORPORATION

                                       OF

                               BIRCH TELECOM, INC.

      BIRCH TELECOM, INC., a corporation organized and existing under the laws
of the State of Delaware, certifies as follows:

      1. The original Certificate of Incorporation of Birch Telecom, Inc. was
filed with the Delaware Secretary of State on December 23, 1996.

      2. This Restated Certificate of Incorporation amends and restates the
provisions of the Certificate of Incorporation of this Corporation, and was duly
adopted in accordance with Sections 245 and 228 of the General Corporation Law
of the State of Delaware by the directors and stockholders of the Corporation.

      3. The text of the Certificate of Incorporation is amended and restated to
read in its entirety as set forth below:

      First: The name of the Corporation is Birch Telecom, Inc. (the
"Corporation").

      Second: The address of the Corporation's initial registered office in the
State of Delaware is 1013 Centre Road, in the City of Wilmington, County of New
Castle, and the name of its initial registered agent at such address is the
Corporation Service Company.

      Third: The purpose of the Corporation is to engage in any lawful act or
activity for which corporations may be organized under the Delaware General
Corporation Law.

      Fourth:

A. The aggregate number of shares which the Corporation shall have authority to
issue shall be 135,000,000 shares, divided into 80,000,000 shares of common
stock ("Common Stock"), and 55,000,000 shares of preferred stock ("Preferred
Stock"). The Preferred Stock shall have a par value of one-tenth of one cent
($.001) each, and the Common Stock shall have a par value of one-tenth of one
cent ($.001) each.

B. The Preferred Stock may be issued from time to time in one or more series.
The Board of Directors is hereby authorized, within the limitations and
restrictions stated in this Restated Certificate of Incorporation, to fix or
alter the dividend rights, dividend rate, conversion rate, voting rights, rights
and terms of redemption (including sinking fund provisions), the redemption
price or prices, the liquidation preferences of any wholly unissued series of
Preferred Stock, and the number of shares constituting any such series and the
designation thereof, or any of them; and to increase or decrease the number of
shares of any series subsequent to the issue of shares of that series, but


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not below the number of shares of such series then outstanding. In case the
number of shares of any series shall be so decreased, the shares constituting
such decrease shall resume the status which they had prior to the adoption of
the resolution originally fixing the number of shares of such series.

      Of the authorized shares of Preferred Stock, 8,750,000 shares are hereby
designated "Series B Preferred Stock"; 8,500,000 shares are hereby designated
"Series C Preferred Stock"; 3,000,000 shares are hereby designated "Series D
Preferred Stock"; 1,904,898 shares are hereby designated "Series E Preferred
Stock"; and 30,000,000 shares are hereby designated "Series F Preferred Stock."

C. The powers, preferences, rights, restrictions and other matters relating to
the Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
Stock, Series E Preferred Stock and Series F Preferred Stock are as follows:

            (1) Dividends.

            (a) Series B Preferred Stock. The holders of Series B Preferred
      Stock shall be entitled to receive dividends in cash at the rate of
      fifteen percent (15%) per annum on an amount equal to $1.52 plus all
      unpaid dividends accrued on such shares of Series B Preferred Stock, on
      each outstanding share of Series B Preferred Stock (as adjusted for any
      stock dividends, combinations, splits and the like with respect to such
      shares), when and as declared by the Board of Directors out of the funds
      legally available for that purpose. Such dividends shall be cumulative
      from the date of issuance of the Series B Preferred Stock, whether or not
      earned, whether or not funds of the Corporation are legally available for
      the payment of dividends and whether or not declared by the Board, but
      such dividends shall be payable only when, as, and if declared by the
      Board. So long as any shares of Series B Preferred Stock shall be
      outstanding, no dividend, whether in cash, stock or property, shall be
      paid or declared, nor shall any other distribution be made, on any shares
      of Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock or Common Stock, nor shall more than 2,225,000 shares of Series C
      Preferred Stock or any shares of Series D Preferred Stock or Common Stock
      be purchased, redeemed or otherwise acquired for value by the Corporation
      (except for acquisitions of Common Stock by the Corporation pursuant to
      agreements which permit the Corporation to repurchase such shares upon
      termination of services to the Corporation or in exercise of the
      Corporation's right of first refusal upon a proposed transfer) until all
      dividends set forth in this Section (1)(a) on the Series B Preferred Stock
      shall have been paid or declared and set apart.

            (b) Series C Preferred Stock. The holders of Series C Preferred
      Stock shall be entitled to receive dividends in cash at the rate of ten
      percent (10%) per annum on an amount equal to $1.52 on each outstanding
      share of Series C Preferred Stock (as adjusted for any stock dividends,
      combinations, splits and the like with respect to such shares), when and
      as declared by the Board of Directors out of funds legally available for
      that purpose. Notwithstanding anything to the contrary herein, such
      dividends shall be payable only when, as and if declared by the Board of
      Directors and shall not be cumulative. So long as any shares of Series C
      Preferred Stock shall be outstanding, no dividend, whether in cash, stock
      or property, shall be paid or declared, nor shall any other distribution
      be made, on any shares of Common Stock, nor shall any shares of Common
      Stock be purchased, redeemed or


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      otherwise acquired for value by the Corporation (except for acquisitions
      of Common Stock by the Corporation pursuant to agreements which permit the
      Corporation to repurchase such shares upon termination of services to the
      Corporation or in exercise of the Corporation's right of first refusal
      upon a proposed transfer) until all dividends set forth in this Section
      (1)(b) on the Series C Preferred Stock shall have been paid or declared
      and set apart.

            (c) Series D Preferred Stock. The holders of Series D Preferred
      Stock shall be entitled to receive dividends in cash at the rate of
      fifteen percent (15%) per annum on an amount equal to $4.50 plus all
      unpaid dividends accrued on such shares of Series D Preferred Stock, on
      each outstanding share of Series D Preferred Stock (as adjusted for any
      stock dividends, combinations, splits and the like with respect to such
      shares), when and as declared by the Board of Directors out of the funds
      legally available for that purpose. Such dividends shall be cumulative
      from the date of issuance of the Series D Preferred Stock, whether or not
      earned, whether or not funds of the Corporation are legally available for
      the payment of dividends and whether or not declared by the Board, but
      such dividends shall be payable only when, as, and if declared by the
      Board. So long as any shares of Series D Preferred Stock shall be
      outstanding, no dividend, whether in cash, stock or property, shall be
      paid or declared, nor shall any other distribution be made, on any shares
      of Series B Preferred Stock (other than in shares of Series E Preferred
      Stock), Series C Preferred Stock, Series E Preferred Stock or Common
      Stock, nor shall more than 2,225,000 shares of Series C Preferred Stock or
      any shares of Series B Preferred Stock or Common Stock be purchased,
      redeemed or otherwise acquired for value by the Corporation (except for
      acquisitions of Common Stock by the Corporation pursuant to agreements
      which permit the Corporation to repurchase such shares upon termination of
      services to the Corporation or in exercise of the Corporation's right of
      first refusal upon a proposed transfer) until all dividends set forth in
      this Section (1)(c) on the Series D Preferred Stock shall have been paid
      or declared and set apart.

            (d) Series E Preferred Stock. The holders of Series E Preferred
      Stock shall be entitled to receive dividends in cash at the rate of
      fifteen percent (15%) per annum on an amount equal to $4.50 plus all
      unpaid dividends accrued on such shares of Series E Preferred Stock, on
      each outstanding share of Series E Preferred Stock (as adjusted for any
      stock dividends, combinations, splits and the like with respect to such
      shares), when and as declared by the Board of Directors out of the funds
      legally available for that purpose. Such dividends shall be cumulative
      from the date of issuance of the Series E Preferred Stock, whether or not
      earned, whether or not funds of the Corporation are legally available for
      the payment of dividends and whether or not declared by the Board, but
      such dividends shall be payable only when, as, and if declared by the
      Board. So long as any shares of Series E Preferred Stock shall be
      outstanding, no dividend, whether in cash, stock or property, shall be
      paid or declared, nor shall any other distribution be made, on any shares
      of Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
      Stock or Common Stock, nor shall more than 2,225,000 shares of Series C
      Preferred Stock or any shares of Series B Preferred Stock, Series D
      Preferred Stock or Common Stock be purchased, redeemed or otherwise
      acquired for value by the Corporation (except for acquisitions of Common
      Stock by the Corporation pursuant to agreements which permit the
      Corporation to repurchase such shares upon termination of services to the
      Corporation or in exercise of the Corporation's


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<PAGE>

      right of first refusal upon a proposed transfer) until all dividends set
      forth in this Section (1)(d) on the Series E Preferred Stock shall have
      been paid or declared and set apart.

            (e) Series F Preferred Stock. The holders of Series F Preferred
      Stock shall be entitled to receive dividends in cash at the rate of
      fifteen percent (15%) per annum on an amount equal to the purchase price
      for such shares (the "Purchase Price") plus all unpaid dividends accrued
      on such shares of Series F Preferred Stock, on each outstanding share of
      Series F Preferred Stock (as adjusted for any stock dividends,
      combinations, splits and the like with respect to such shares), payable on
      March 31, June 30, September 30 and December 31 of each year, when and as
      declared by the Board of Directors out of the funds legally available for
      that purpose. Such dividends shall be cumulative from the date of issuance
      of the Series F Preferred Stock, whether or not earned, whether or not
      funds of the Corporation are legally available for the payment of
      dividends and whether or not declared by the Board, but such dividends
      shall be payable only when, as, and if declared by the Board. The Purchase
      Price for the Series F Preferred Stock is $4.50 per share for the initial
      purchase of 13,333,334 shares by BTI Ventures L.L.C. or its affiliates
      ("BTI"). In addition, BTI retains the option (the "Option") to acquire
      5,263,158 shares of Series F Preferred Stock at a Purchase Price of $4.75
      per share and 5,000,000 shares of Series F Preferred Stock at a Purchase
      Price of $5.00 per share. So long as any shares of Series F Preferred
      Stock shall be outstanding, no dividend, whether in cash or property,
      shall be paid or declared, nor shall any other distribution be made, on
      any shares of Series B Preferred Stock, Series C Preferred Stock, Series D
      Preferred Stock, Series E Preferred Stock, Common Stock or any other class
      or series of capital stock of the Corporation, nor shall more than
      2,225,000 shares of Series C Preferred or any shares of Series B Preferred
      Stock, Series D Preferred Stock, Common Stock or any other class or series
      of capital stock of the Corporation be purchased, redeemed or otherwise
      acquired for value by the Corporation (except for the redemption of the
      Series E Preferred Stock or acquisitions of Common Stock by the
      Corporation pursuant to agreements which permit the Corporation to
      repurchase such shares upon termination of services to the Corporation)
      until all dividends set forth in this Section (1)(e) on the Series F
      Preferred Stock shall have been paid or declared and set apart. In
      addition to the 15% quarterly dividend payable on the Series F Preferred
      Stock, the shares of Series F Preferred Stock shall be entitled to receive
      the amount of any cash or non-cash dividends or distributions declared and
      paid on the shares of Common Stock, as if the shares of Series F Preferred
      Stock had been converted immediately prior to the record date for the
      payment of such dividend or distribution.

            (2) Liquidation Rights.

            (a) Series F Preferred Stock. Upon any liquidation, dissolution, or
      winding up of the Corporation, and before any distribution or payment
      shall be made to the holders of Series B Preferred Stock, Series C
      Preferred Stock or Common Stock, the holders of Series F Preferred Stock
      shall be entitled to be paid out of the assets of the Corporation an
      amount equal to the greater of (i) the sum of (a) the applicable Purchase
      Price per share of Series F Preferred Stock (as adjusted for any stock
      dividends, combinations, splits and the like with respect to such shares)
      plus (b) an amount equal to all unpaid dividends accrued on such shares of
      Series F Preferred Stock to the date of payment of such preference,
      whether or not earned, whether or not funds of the Corporation are legally
      available for the payment of


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<PAGE>

      dividends and whether or not such dividends have been declared by the
      Board; or (ii) the amount the holders of Series F Preferred Stock would
      have received upon liquidation, dissolution or winding up of the
      Corporation had such shares of Series F Preferred Stock and all shares of
      Series D Preferred Stock and Series E Preferred Stock been converted to
      Common Stock immediately prior to such liquidation, dissolution or winding
      up (such greater amount, the "Series F Liquidation Preference"), for each
      share of Series F Preferred Stock held by them. If the assets of the
      Corporation shall be insufficient to make payment in full to all holders
      of Series F Preferred Stock, Series E Preferred Stock and Series D
      Preferred Stock of the liquidation preference set forth in Sections (2)(a)
      through (c), inclusive, then such assets shall be distributed among the
      holders of Series F Preferred Stock, Series E Preferred Stock and Series D
      Preferred Stock at the time outstanding ratably in proportion to the full
      amounts to which they would otherwise be respectively entitled.

            (b) Series E Preferred Stock. Upon any liquidation, dissolution, or
      winding up of the Corporation, and before any distribution or payment
      shall be made to the holders of Series B Preferred Stock, Series C
      Preferred Stock or Common Stock, the holders of Series E Preferred Stock
      shall be entitled to be paid out of the assets of the Corporation an
      amount equal to the greater of (i) the sum of (a) $4.50 per share of
      Series E Preferred Stock (as adjusted for any stock dividends,
      combinations, splits and the like with respect to such shares) plus (b) an
      amount equal to all unpaid dividends accrued on such shares of Series E
      Preferred Stock to the date of payment of such preference, whether or not
      earned, whether or not funds of the Corporation are legally available for
      the payment of dividends and whether or not such dividends have been
      declared by the Board; or (ii) the amount the holders of Series E
      Preferred Stock would have received upon liquidation, dissolution or
      winding up of the Corporation had such shares of Series E Preferred Stock
      and all shares of Series D Preferred Stock and Series F Preferred Stock
      been converted to Common Stock immediately prior to such liquidation,
      dissolution or winding up (such greater amount, the "Series E Liquidation
      Preference"), for each share of Series E Preferred Stock held by them. If
      the assets of the Corporation shall be insufficient to make payment in
      full to all holders of Series F Preferred Stock, Series E Preferred Stock
      and Series D Preferred Stock of the liquidation preference set forth in
      Sections (2)(a) through (c), inclusive, then such assets shall be
      distributed among the holders of Series F Preferred Stock, Series E
      Preferred Stock and Series D Preferred Stock at the time outstanding
      ratably in proportion to the full amounts to which they would otherwise be
      respectively entitled.

            (c) Series D Preferred Stock. Upon any liquidation, dissolution, or
      winding up of the Corporation, and before any distribution or payment
      shall be made to the holders of Series B Preferred Stock, Series C
      Preferred Stock or Common Stock, the holders of Series D Preferred Stock
      shall be entitled to be paid out of the assets of the Corporation an
      amount equal to the greater of (i) the sum of (a) $4.50 per share of
      Series D Preferred Stock (as adjusted for any stock dividends,
      combinations, splits and the like with respect to such shares) plus (b) an
      amount equal to all unpaid dividends accrued on such shares of Series D
      Preferred Stock to the date of payment of such preference, whether or not
      earned, whether or not funds of the Corporation are legally available for
      the payment of dividends and whether or not such dividends have been
      declared by the Board; or (ii) the amount the holders of Series D
      Preferred Stock would have received upon liquidation, dissolution or


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      winding up of the Corporation had such shares of Series D Preferred Stock
      and all shares of Series E Preferred Stock and Series F Preferred Stock
      been converted to Common Stock immediately prior to such liquidation,
      dissolution or winding up (such greater amount the "Series D Liquidation
      Preference"), for each share of Series D Preferred Stock held by them. If
      the assets of the Corporation shall be insufficient to make payment in
      full to all holders of Series F Preferred Stock, Series E Preferred Stock
      and Series D Preferred Stock of the liquidation preference set forth in
      Sections (2)(a)-(c), then such assets shall be distributed among the
      holders of Series F Preferred Stock, Series E Preferred Stock and Series D
      Preferred Stock at the time outstanding ratably in proportion to the full
      amounts to which they would otherwise be respectively entitled.

            (d) Series B Preferred Stock. Upon any liquidation, dissolution, or
      winding up of the Corporation, and after the payment of the full
      liquidation preference of the Series F Preferred Stock as set forth in
      Section 2(a) above, the Series E Preferred Stock as set forth in Section
      2(b) above, and the Series D Preferred Stock as set forth in Section
      (2)(c) above, and before any distribution or payment shall be made to the
      holders of Series C Preferred Stock or Common Stock, the holders of Series
      B Preferred Stock shall be entitled to be paid out of the assets of the
      Corporation an amount equal to the sum of (i) $1.52 for each share of
      Series B Preferred Stock held by them (as adjusted for any stock
      dividends, combinations, splits and the like with respect to such shares)
      plus (ii) an amount equal to all unpaid dividends accrued on such shares
      of Series B Preferred Stock to the date of payment of such preference,
      whether or not earned, whether or not funds of the Corporation are legally
      available for the payment of dividends and whether or not such dividends
      have been declared by the Board (the "Series B Liquidation Preference"),
      for each share of Series B Preferred Stock held by them. If the remaining
      assets of the Corporation shall be insufficient to make payment in full to
      all holders of Series B Preferred Stock of the liquidation preference set
      forth in this Section (2)(d), then such remaining assets shall be
      distributed among the holders of Series B Preferred Stock at the time
      outstanding ratably in proportion to the full amounts to which they would
      otherwise be respectively entitled.

            (e) Series C Preferred Stock. Upon any liquidation, dissolution, or
      winding up of the Corporation, and after the payment of the full
      liquidation preference of the Series F Preferred Stock as set forth in
      Section 2(a) above, the Series E Preferred Stock as set forth in Section
      2(b) above, and the Series D Preferred Stock as set forth in Section
      (2)(c) above and the Series B Preferred Stock as set forth in Section
      (2)(d) above, and before any distribution or payment shall be made to the
      holders of Common Stock, the holders of Series C Preferred Stock shall be
      entitled to be paid out of the assets of the Corporation an amount equal
      to the sum of (i) $1.52 per share of Series C Preferred Stock (as adjusted
      for any stock dividends, combinations, splits and the like with respect to
      such shares), plus (ii) an amount equal to all declared and unpaid
      dividends for each share of Series C Preferred Stock held by them (the
      "Series C Liquidation Preference"). If the remaining assets of the
      Corporation shall be insufficient to make payment in full to all holders
      of Series C Preferred Stock of the liquidation preference set forth in
      this Section (2)(e), then such remaining assets shall be distributed among
      the holders of Series C Preferred Stock at the time outstanding ratably in
      proportion to the full amounts to which they would otherwise be
      respectively entitled.


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<PAGE>

            (f) Common Stock. Upon any liquidation, dissolution, or winding up
      of the Corporation, and after the payment in full of the Series F
      Liquidation Preference, Series E Liquidation Preference, Series D
      Liquidation Preference, the Series B Liquidation Preference and the Series
      C Liquidation Preference, then the remaining assets of the Corporation
      legally available for distribution, if any, shall be distributed ratably
      to the holders of the Common Stock.

            (g) Deemed Liquidations. The following events will be deemed a
      liquidation under this section: (i) consolidation, reorganization, share
      exchange, recapitalization, business combination, merger or similar
      transaction involving the Corporation in which the stockholders of the
      Corporation immediately prior to such transaction in the aggregate cease
      to own at least 50% of the voting securities of the entity surviving or
      resulting from such transaction (or the ultimate parent thereof), or any
      transaction or series of related transactions in which in excess of 50% of
      the Corporation's voting power is transferred (in any case, an
      "Acquisition"), but not including the purchase of Series F Preferred Stock
      by BTI; and (ii) the sale, lease, transfer or other disposition of all or
      substantially all of the assets of the Corporation (an "Asset Transfer").

            (h) Payments in Property. Whenever the distribution provided for in
      this Section (2) shall be payable in securities or other property other
      than cash, the value of that distribution shall be the fair market value
      of those securities or other property.

            (i) Determinations of Fair Market Value. Whenever a determination of
      fair market value is required under this Restated Certificate of
      Incorporation, the fair market value shall be determined based upon the
      price that would be paid by a willing buyer of the assets or shares at
      issue, in a sale process designed to attract all possible participants and
      to maximize value. The determination of fair market value shall be made
      (i) by the Board of Directors or (ii) if a majority in interest of the
      Series F Preferred Stock object to such determination by the Board of
      Directors, by a nationally recognized investment banking firm mutually
      agreeable to the Corporation and a majority in interest of the shares of
      Series F Preferred Stock. The fees and expenses of such investment banking
      firm shall be paid by the Corporation.

            (3) Voting Rights.

            (a) Series B, C, D, E and F Preferred Stock. Except as set forth in
      Sections (3)(b) and (3)(c), the holders of Series B Preferred Stock shall
      be entitled to cast one vote for each share of Series B Preferred Stock
      held by them on an as-converted basis, the holders of Series C Preferred
      Stock shall be entitled to cast one vote for each share of Series C
      Preferred Stock held by them on an as-converted basis, the holders of
      Series D Preferred Stock shall be entitled to cast one vote for each share
      of Series D Preferred Stock held by them on an as-converted basis, the
      holders of Series E Preferred Stock shall be entitled to cast one vote for
      each share of Series E Preferred Stock held by them on an as-converted
      basis, and the holders of Series F Preferred Stock shall be entitled to
      cast one vote for each share of Series F Preferred Stock held by them on
      an as-converted basis. Such votes shall be cast together with those cast
      by the holders of Common Stock and not as a separate class, except as
      otherwise provided herein or required by applicable law. The Series B
      Preferred Stock, the


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<PAGE>

      Series C Preferred Stock, the Series D Preferred Stock, the Series E
      Preferred Stock and the Series F Preferred Stock shall not have cumulative
      voting rights.

            (b) Restrictions and Limitations.

                  (i) So long as the outstanding shares of Series B Preferred
            Stock, Series D Preferred Stock and Series E Preferred Stock
            represent at least five percent (5%) or more of the outstanding
            shares of Common Stock of the Corporation (on an as-converted to
            Common Stock basis), the approval by the vote or written consent of
            the holders of at least a majority of the then outstanding shares of
            Series B Preferred Stock, Series D Preferred Stock and Series E
            Preferred Stock, voting together as a single class, shall be
            necessary for effecting or validating the following actions:

                        (A) Any action that results in the payment or
                  declaration of a dividend on any shares of Common Stock; or

                        (B) The purchase or other acquisition (or payment into
                  or set aside for a sinking fund for such purpose) of any
                  Series C Preferred Stock or Common Stock; provided, however,
                  that this restriction shall not apply to: (x) the repurchase
                  of shares of Common Stock by the Corporation pursuant to
                  agreements which permit the Corporation to repurchase such
                  shares upon termination of services to the Corporation; or (y)
                  the exercise of the Corporation's right of first refusal with
                  the approval of the Board of Directors upon a proposed
                  transfer.

                  (ii) So long as the outstanding shares of Series B Preferred
            Stock, Series D Preferred Stock and Series E Preferred Stock,
            represents at least five percent (5%) or more of the outstanding
            shares of Common Stock of the Corporation (on an as-converted to
            Common Stock basis), the approval by the vote or written consent of
            the holders of at least seventy-five percent (75%) of the then
            outstanding shares of Series B Preferred Stock, Series D Preferred
            Stock, and Series E Preferred Stock, voting together as a single
            class, shall be necessary for effecting or validating the following
            actions:

                        (A) Any amendment, alteration, or repeal of any
                  provision of the Restated Certificate of Incorporation or
                  Bylaws of the Corporation (including the filing of a
                  Certificate of Designation), that adversely affects the voting
                  powers, preferences or other special rights or privileges,
                  qualifications, limitations, or restrictions of the Series B
                  Preferred Stock, Series D Preferred Stock or Series E
                  Preferred Stock, or

                        (B) Any amendment, alteration, or repeal of Section
                  (3)(b)(i) or Section 3(b)(ii).

                  (iii) So long as the outstanding shares of Series F Preferred
            Stock represents at least five percent (5%) or more of the
            outstanding shares of Common Stock of the Corporation (on an
            as-converted to Common Stock basis), the approval by the vote or
            written consent of the holders of at least seventy-five percent
            (75%)


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<PAGE>

            of the then outstanding shares of Series F Preferred Stock shall be
            necessary for effecting or validating the following actions with
            respect to the Corporation:

                        (A) Any amendment, alteration, or repeal of any
                  provision of the Restated Certificate of Incorporation or
                  Bylaws of the Corporation (including the filing of a
                  Certificate of Designation), that adversely affects the voting
                  powers, preferences or other special rights or privileges,
                  qualifications, limitations, or restrictions of the Series F
                  Preferred Stock;

                        (B) Any authorization, creation, or increase in the
                  authorized number of any class or series of capital stock
                  ranking senior to or on parity with the Series F Preferred
                  Stock as to dividends, voting rights or liquidation, or any
                  issuance of any shares of such class or series of capital
                  stock (or any securities convertible into, or exchangeable or
                  exerciseable for such shares);

                        (C) Any payment of any cash or non-cash dividends or
                  other distributions with respect to its capital stock;

                        (D) Any reclassification, combination, split,
                  subdivision, redemption, repurchase or other acquisition of
                  any shares of capital stock (except for (x) acquisitions of
                  Common Stock by the Corporation pursuant to agreements which
                  permit the Corporation to repurchase such shares upon the
                  termination of services to the Corporation or in exercise of
                  the Corporation's right of first refusal upon a proposed
                  transfer, (y) any redemption of the Series E Preferred Stock
                  pursuant to Section (5)(b) and (z) the redemption by the
                  Corporation of up to 2,225,000 shares of Series C Preferred
                  Stock);

                        (E) Any agreement by the Corporation or its stockholders
                  regarding an Acquisition or an Asset Transfer (as defined in
                  Section 2(g));

                        (F) Any acquisition of assets or securities of any other
                  person or entity, except for acquisitions involving cash with
                  an aggregate value of less than five percent (5%) of the
                  Corporation's assets for any single acquisition or series of
                  related transactions;

                        (G) Any joint venture or similar profit sharing
                  arrangement involving material assets or the payment or
                  receipt of more than five percent (5%) of the Corporation's
                  assets;

                        (H) Any liquidation, dissolution or winding up of the
                  Corporation; or

                        (I) An amendment, alteration, or repeal of this Section
                  (3)(b).

            (c) Election of Board of Directors.


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<PAGE>

            (i) For so long as at least 6,666,667 shares of Series F Preferred
      Stock remain outstanding (subject to adjustment for any stock split,
      reverse stock split and the like), the holders of Series F Preferred
      Stock, voting as a separate class, shall be entitled to elect that number
      of directors to the Corporation's Board of Directors equal to (A) the
      authorized size of the Corporation's Board of Directors, multiplied by (B)
      (I) the total number of shares of the Corporation's Common Stock
      represented by the shares of Series F Preferred Stock then outstanding (on
      an as-converted basis), divided by (II) the total number of shares of the
      Corporation's Common Stock then outstanding (assuming conversion of all
      Preferred Stock then outstanding), rounding up so that the nominees of the
      holders of Series F Preferred Stock will not represent less than such
      proportionate interest in (B) above, at each meeting or pursuant to each
      consent of the Corporation's shareholders for the election of directors;
      provided, however, that for purposes of this Section (3)(c)(i) only, the
      calculation of the total number of shares outstanding shall exclude any
      equity securities issued by the Company after the Series F Original Issue
      Date (other than the shares issued pursuant to the Option) if at such time
      (x) BTI has not exercised any part of the Option and the outstanding
      shares of Series F Preferred Stock represent twenty percent (20%) or more
      of the outstanding Common Stock of the Company (on an as-converted to
      Common Stock basis), or (y) BTI has exercised any part of the Option and
      the outstanding shares of Series F Preferred Stock represent thirty
      percent (30%) or more of the outstanding Common Stock of the Company (on
      an as-converted to Common Stock basis). Only the holders of the Series F
      Preferred Stock shall be entitled to remove from office such directors or
      to fill any vacancy caused by the resignation, death or removal of such
      directors.

            (ii) For so long as at least 8,532,394 shares of Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock and Series E
      Preferred Stock remain outstanding (subject to adjustment for any stock
      split, reverse stock split and the like), the holders of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and
      Series E Preferred Stock, voting together as a single class, shall be
      entitled to elect two (2) members of the Board of Directors at each
      meeting or pursuant to each consent of the Corporation's shareholders for
      the election of directors, and only the holders of the of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and
      Series E Preferred Stock, voting together a single class, shall be
      entitled to remove from office such directors or to fill any vacancy
      caused by the resignation, death or removal of such directors.

            (iii) For so long as the conditions set forth in 3(c)(i) and (ii)
      are satisfied the holders of Common Stock, voting as a separate class,
      shall be entitled to elect one (1) member of senior management of the
      Corporation to the Board of Directors at each meeting or pursuant to each
      consent of the Corporation's shareholders for the election of directors,
      and only the holders of the Common Stock shall be entitled to remove from
      office such director and to fill any vacancy caused by the resignation,
      death or removal of such director.

            (iv) Except as provided in 3(c)(i), (ii) and (iii) above, the
      holders of Common


                                       10
<PAGE>

      Stock and Preferred Stock, voting together as a single class, shall be
      entitled to elect all members of the Board of Directors.

            (4) Conversion Rights. The holders of the Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock and Series F Preferred Stock shall have the following rights with
      respect to the conversion of the Series B Preferred Stock, Series C
      Preferred Stock, Series D Preferred Stock, Series E Preferred Stock and
      Series F Preferred Stock into shares of Common Stock (the "Conversion
      Rights"):

            (a) Optional Conversion. Subject to and in compliance with the
      provisions of this Section (4), any shares of Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock and Series F Preferred
      Stock may, at the option of the holder, be converted at any time into
      fully paid and nonassessable shares of Common Stock. Subject to and in
      compliance with the provisions of this Section (4), any shares of Series E
      Preferred Stock may, at the option of the holder, be converted at any time
      after October 1, 1999 into fully paid and nonassessable shares of Common
      Stock. The number of shares of Common Stock to which a holder of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock, or Series F Preferred Stock shall be entitled
      upon conversion shall be the product obtained by multiplying the
      applicable Preferred Stock Rate then in effect (determined as provided in
      Section (4)(c)) by the number of shares of Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock, or Series F Preferred Stock being converted by such holder.

            (b) Automatic Conversion. Subject to and in compliance with the
      provisions of this Section (4), all outstanding shares of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock and Series F Preferred Stock shall be
      automatically converted into shares of Common Stock immediately prior to
      the closing of a firmly underwritten public offering pursuant to an
      effective registration statement under the Securities Act of 1933, as
      amended, covering the offer and sale of Common Stock for the account of
      the Company in which the gross proceeds to the Corporation (before
      underwriting discounts, commissions and fees) are at least $60,000,000.
      The number of shares of Common Stock to which a holder of Series B
      Preferred Stock shall be entitled upon conversion shall be the product
      obtained by multiplying the applicable Preferred Stock Rate then in effect
      by the number of shares of Series B Preferred Stock being converted by
      such holder. The number of shares of Common Stock to which a holder of
      Series C Preferred Stock shall be entitled upon conversion shall be the
      product obtained by multiplying the applicable Preferred Stock Rate then
      in effect by the number of shares of Series C Preferred Stock being
      converted by such holder. The number of shares of Common Stock to which a
      holder of Series D Preferred Stock shall be entitled upon conversion shall
      be the product obtained by multiplying the applicable Preferred Stock Rate
      then in effect by the number of shares of Series D Preferred Stock being
      converted by such holder. The number of shares of Common Stock to which a
      holder of Series E Preferred Stock shall be entitled upon conversion shall
      be the product obtained by multiplying the applicable Preferred Stock Rate
      then in effect by the number of shares of Series E Preferred Stock being
      converted by such holder. The number of shares of Common Stock to which a
      holder of Series F Preferred Stock shall be entitled upon conversion shall
      be the product obtained by multiplying the applicable Preferred Stock Rate
      then in effect by the


                                       11
<PAGE>

      number of shares of Series F Preferred Stock being converted by such
      holder.

            (c) Preferred Stock. The conversion rate of the applicable series of
      Preferred Stock in effect at any time for conversion of the Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock, or Series F Preferred Stock (the "Preferred
      Stock Rate") shall be the quotient obtained by dividing the Original Issue
      Price of the applicable series of Preferred Stock by the applicable
      Preferred Stock Price, calculated as provided in Section (4)(d). The
      "Original Issue Price" for the Series B Preferred Stock and Series C
      Preferred Stock shall initially equal $1.52 per share. The "Original Issue
      Price" of the Series D Preferred Stock and Series E Preferred Stock shall
      initially equal $4.50 per share. The "Original Issue Price" of the Series
      F Preferred Stock shall initially equal the Purchase Price with respect to
      each share.

            (d) Conversion Price. The conversion price for the applicable series
      of Preferred Stock shall initially be the Original Issue Price of the
      applicable series of Preferred Stock (the "Preferred Stock Price"). Such
      initial Preferred Stock Price shall be adjusted from time to time after
      the Series F Original Issue Date (as defined below) in accordance with
      this Section (4). All references to the Preferred Stock Price herein shall
      mean the Preferred Stock Price as applicable and as so adjusted.

            (e) Mechanics of Conversion. Each holder of Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock, Series E
      Preferred Stock, or Series F Preferred Stock who desires to convert the
      same into shares of Common Stock pursuant to this Section (4) shall
      surrender the certificate or certificates therefor, duly endorsed, at the
      office of the Corporation or any transfer agent for the Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock, Series E
      Preferred Stock, or Series F Preferred Stock, and shall give written
      notice to the Corporation at such office that such holder elects to
      convert the same. Such notice shall state the number of shares of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock, or Series F Preferred Stock being converted.
      Thereupon, the Corporation shall promptly issue and deliver at such office
      to such holder a certificate or certificates for the number of shares of
      Common Stock to which such holder is entitled. Such conversion shall be
      deemed to have been made at the close of business on the date of such
      surrender of the certificates representing the shares of Series B
      Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock, or Series F Preferred Stock to be converted, and
      the person entitled to receive the shares of Common Stock issuable upon
      such conversion shall be treated for all purposes as the record holder of
      such shares of Common Stock on such date.

            (f) Adjustment for Stock Splits and Combinations. If the Corporation
      shall at any time or from time to time after August 5, 1999 (the "Series F
      Original Issue Date") effect a subdivision of the outstanding Common Stock
      without a corresponding subdivision of the Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock, or Series F Preferred Stock, the Preferred Stock Price for each
      series of Preferred Stock in effect immediately before that subdivision
      shall be proportionately decreased. Conversely, if the Corporation shall
      at any time or from time to time after the Series F Original Issue Date
      combine the outstanding shares of Common Stock into a smaller number of
      shares without a corresponding combination of the Series B Preferred
      Stock, Series C Preferred Stock, Series


                                       12
<PAGE>

      D Preferred Stock, Series E Preferred Stock, or Series F Preferred Stock,
      the Preferred Stock Price for each series of Preferred Stock in effect
      immediately before the combination shall be proportionately increased. Any
      adjustment under this Section (4)(f) shall become effective at the close
      of business on the date the subdivision or combination becomes effective.

            (g) Adjustment for Common Stock Dividends and Distributions. If the
      Corporation at any time or from time to time makes, or fixes a record date
      for the determination of holders of Common Stock entitled to receive, a
      dividend or other distribution payable in additional shares of Common
      Stock, in each such event the Preferred Stock Price of each applicable
      series of Preferred Stock that is then in effect shall be decreased as of
      the time of such issuance or, in the event such record date is fixed, as
      of the close of business on such record date, by multiplying the Preferred
      Stock Price for each applicable series of Preferred Stock then in effect
      by a fraction (i) the numerator of which is the total number of shares of
      Common Stock issued and outstanding immediately prior to the time of such
      issuance or the close of business on such record date, and (ii) the
      denominator of which is the total number of shares of Common Stock issued
      and outstanding immediately prior to the time of such issuance or the
      close of business on such record date plus the number of shares of Common
      Stock issuable in payment of such dividend or distribution; provided,
      however, that if such record date is fixed and such dividend is not fully
      paid or if such distribution is not fully made on the date fixed therefor,
      the applicable Preferred Stock Price shall be recomputed accordingly as of
      the close of business on such record date and thereafter the applicable
      Preferred Stock Price shall be adjusted pursuant to this Section (4)(g) to
      reflect the actual payment of such dividend or distribution.

            (h) Adjustments for Other Dividends and Distributions. If the
      Corporation at any time or from time to time makes, or fixes a record date
      for the determination of holders of Common Stock entitled to receive, a
      dividend or other distribution payable in securities of the Corporation
      other than shares of Common Stock, in each such event provision shall be
      made so that the holders of the Series B Preferred Stock, Series C
      Preferred Stock, Series D Preferred Stock, Series E Preferred Stock and
      Series F Preferred Stock shall receive upon conversion thereof, in
      addition to the number of shares of Common Stock receivable thereupon, the
      amount of other securities of the Corporation which they would have
      received had their Series B Preferred Stock, Series C Preferred Stock,
      Series D Preferred Stock, Series E Preferred Stock, or Series F Preferred
      Stock been converted into Common Stock on the date of such event and had
      they thereafter, during the period from the date of such event to and
      including the conversion date, retained such securities receivable by them
      as aforesaid during such period, subject to all other adjustments called
      for during such period under this Section (4)(h) with respect to the
      rights of the holders of the Preferred Stock or with respect to such other
      securities by their terms.

            (i) Adjustment for Reclassification, Exchange and Substitution. If
      at any time or from time to time after the Series F Original Issue Date,
      the Common Stock issuable upon the conversion of the Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock, Series E
      Preferred Stock and Series F Preferred Stock is changed into the same or a
      different number of shares of any class or classes of stock, whether by
      recapitalization, reclassification or otherwise (other than an Acquisition
      or Asset Transfer as defined in Section (2)(g) or a subdivision or
      combination of shares or stock dividend or a reorganization, merger,
      consolidation or sale of assets provided for elsewhere in this Section
      (4)), in any such event


                                       13
<PAGE>

      each holder of Series B Preferred Stock, Series C Preferred Stock, Series
      D Preferred Stock, Series E Preferred Stock and Series F Preferred Stock
      shall have the right thereafter to convert such stock into the kind and
      amount of stock and other securities and property receivable upon such
      recapitalization, reclassification or other change by holders of the
      maximum number of shares of Common Stock into which such shares of Series
      B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock, or Series F Preferred Stock could have been
      converted immediately prior to such recapitalization, reclassification or
      change, all subject to further adjustment as provided herein or with
      respect to such other securities or property by the terms thereof.

            (j) Reorganizations, Mergers, Consolidations or Sales of Assets. If
      at any time or from time to time after the Series F Original Issue Date,
      there is a capital reorganization of the Common Stock, merger,
      consolidation or sale of assets (other than an Acquisition or Asset
      Transfer as defined in Section (2)(g) or a recapitalization, subdivision,
      combination, reclassification, exchange or substitution of shares provided
      for elsewhere in this Section (4)), as a part of such capital
      reorganization, merger, consolidation or sale of assets, provision shall
      be made so that the holders of the Series B Preferred Stock, Series C
      Preferred Stock, Series D Preferred Stock, Series E Preferred Stock and
      Series F Preferred Stock shall thereafter be entitled to receive upon
      conversion of the Series B Preferred Stock, Series C Preferred Stock,
      Series D Preferred Stock, Series E Preferred Stock and Series F Preferred
      Stock the number of shares of stock or other securities or property of the
      Corporation or third party entity to which a holder of the number of
      shares of Common Stock deliverable upon conversion would have been
      entitled on such capital reorganization, merger, consolidation or sale of
      assets, subject to adjustment in respect of such stock or securities by
      the terms thereof. In any such case, appropriate adjustment shall be made
      in the application of the provisions of this Section (4) with respect to
      the rights of the holders of Series B Preferred Stock, Series C Preferred
      Stock, Series D Preferred Stock, Series E Preferred Stock and Series F
      Preferred Stock after the capital reorganization, merger, consolidation or
      sale of assets to the end that the provisions of this Section (4)
      (including adjustment of the Preferred Stock Price then in effect and the
      number of shares issuable upon conversion of the Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock and Series F Preferred Stock) shall be applicable after that event
      and be as nearly equivalent as practicable.

            (k) Sale of Shares Below Preferred Stock Price.

                  (i) If at any time or from time to time after the Series F
            Original Issue Date, the Corporation issues or sells, or is deemed
            by the express provisions of this Section (4)(k) to have issued or
            sold, Additional Shares of Common Stock (as defined in Section
            (4)(k)(iv) below), other than as a dividend or other distribution on
            any class of stock as provided in Section (4)(g) above, and other
            than a subdivision or combination of shares of Common Stock as
            provided in Section (4)(f) above, for an Effective Price (as defined
            in Section (4)(k)(iv) below) less than the then effective Preferred
            Stock Price with respect to the applicable series of Preferred
            Stock, then and in each such case the then existing Preferred Stock
            Price with respect to the applicable series of Preferred Stock shall
            be reduced, as of the opening of business on the date of such issue
            or sale, to a price determined by multiplying the applicable
            Preferred Stock Price by a fraction (i) the numerator of which shall
            be (A) the number of shares of Common Stock


                                       14
<PAGE>

            deemed outstanding (as defined below) immediately prior to such
            issue or sale, plus (B) the number of shares of Common Stock which
            the aggregate consideration received (as defined in Section
            (4)(k)(ii) below) by the Corporation for the total number of
            Additional Shares of Common Stock so issued would purchase at such
            applicable Preferred Stock Price, and (ii) the denominator of which
            shall be the number of shares of Common Stock deemed outstanding (as
            defined below) immediately prior to such issue or sale plus the
            total number of Additional Shares of Common Stock so issued. For the
            purposes of the preceding sentence, the number of shares of Common
            Stock deemed to be outstanding as of a given date shall be the sum
            of (A) the number of shares of Common Stock actually outstanding,
            (B) the number of shares of Common Stock into which the then
            outstanding shares of Series B Preferred Stock, Series C Preferred
            Stock, Series D Preferred Stock, Series E Preferred Stock and Series
            F Preferred Stock could be converted if fully converted on the day
            immediately preceding the given date, and (C) the number of shares
            of Common Stock which could be obtained through the exercise or
            conversion of all other rights, options and convertible securities
            on the day immediately preceding the given date.

                  (ii) For the purpose of making any adjustment required under
            this Section (4)(k), the consideration received by the Corporation
            for any issue or sale of securities shall (A) to the extent it
            consists of cash, be computed at the net amount of cash received by
            the Corporation after deduction of any underwriting or similar
            commissions, compensation or concessions paid or allowed by the
            Corporation in connection with such issue or sale but without
            deduction of any expenses payable by the Corporation, (B) to the
            extent it consists of property other than cash, be computed at the
            fair value of that property as determined in good faith by the Board
            of Directors, and (C) if Additional Shares of Common Stock,
            Convertible Securities (as defined in Section (4)(k)(iii) below) or
            rights or options to purchase either Additional Shares of Common
            Stock or Convertible Securities are issued or sold together with
            other stock or securities or other assets of the Corporation for a
            consideration which covers both, be computed as the portion of the
            consideration so received that may be reasonably determined in good
            faith by the Board of Directors to be allocable to such Additional
            Shares of Common Stock, Convertible Securities or rights or options.

                  (iii) For the purpose of the adjustment required under this
            Section (4)(k), if the Corporation issues or sells any rights or
            options for the purchase of, or stock or other securities
            convertible into, Additional Shares of Common Stock (such
            convertible stock or securities being herein referred to as
            "Convertible Securities") and if the Effective Price of such
            Additional Shares of Common Stock is less than the applicable
            Preferred Stock Price, in each case the Corporation shall be deemed
            to have issued at the time of the issuance of such rights or options
            or Convertible Securities the maximum number of Additional Shares of
            Common Stock issuable upon exercise or conversion thereof and to
            have received as consideration for the issuance of such shares an
            amount equal to the total amount of the consideration, if any,
            received by the Corporation for the issuance of such rights or
            options or Convertible Securities, plus, in the case of such rights
            or options, the minimum amounts of consideration, if any, payable to
            the Corporation upon the exercise of such rights or options, plus,
            in the case of Convertible Securities, the minimum amounts of
            consideration, if any, payable to the Corporation


                                       15
<PAGE>

            (other than by cancellation of liabilities or obligations evidenced
            by such Convertible Securities) upon the conversion thereof;
            provided that if in the case of Convertible Securities the minimum
            amounts of such consideration cannot be ascertained, but are a
            function of antidilution or similar protective clauses, the
            Corporation shall be deemed to have received the minimum amounts of
            consideration without reference to such clauses; provided further
            that if the minimum amount of consideration payable to the
            Corporation upon the exercise or conversion of rights, options or
            Convertible Securities is reduced over time or on the occurrence or
            non-occurrence of specified events other than by reason of
            antidilution adjustments, the Effective Price shall be recalculated
            using the figure to which such minimum amount of consideration is
            reduced; provided further that if the minimum amount of
            consideration payable to the Corporation upon the exercise or
            conversion of such rights, options or Convertible Securities is
            subsequently increased, the Effective Price shall be again
            recalculated using the increased minimum amount of consideration
            payable to the Corporation upon the exercise or conversion of such
            rights, options or Convertible Securities. No further adjustment of
            the applicable Preferred Stock Price, as adjusted upon the issuance
            of such rights, options or Convertible Securities, shall be made as
            a result of the actual issuance of Additional Shares of Common Stock
            on the exercise of any such rights or options or the conversion of
            any such Convertible Securities. If any such rights or options or
            the conversion privilege represented by any such Convertible
            Securities shall expire without having been exercised, the
            applicable Preferred Stock Price as adjusted upon the issuance of
            such rights, options or Convertible Securities shall be readjusted
            to the applicable Preferred Stock Price which would have been in
            effect had an adjustment been made on the basis that the only
            Additional Shares of Common Stock so issued were the Additional
            Shares of Common Stock, if any, actually issued or sold on the
            exercise of such rights or options or rights of conversion of such
            Convertible Securities, and such Additional Shares of Common Stock,
            if any, were issued or sold for the consideration actually received
            by the Corporation upon such exercise, plus the consideration, if
            any, actually received by the Corporation for the granting of all
            such rights or options, whether or not exercised, plus the
            consideration received for issuing or selling the Convertible
            Securities actually converted, plus the consideration, if any,
            actually received by the Corporation (other than by cancellation of
            liabilities or obligations evidenced by such Convertible Securities)
            on the conversion of such Convertible Securities, provided that such
            readjustment shall not apply to prior conversions of Series B
            Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
            Series E Preferred Stock, or Series F Preferred Stock.

                  (iv) "Additional Shares of Common Stock" shall mean all shares
            of Common Stock issued by the Corporation or deemed to be issued
            pursuant to this Section (4)(k), whether or not subsequently
            reacquired or retired by the Corporation other than (A) shares of
            Series E Preferred Stock,; (B) shares of Common Stock issued upon
            conversion of the Series B Preferred Stock, Series C Preferred
            Stock, Series D Preferred Stock, Series E Preferred Stock, or Series
            F Preferred Stock; (C) Common Stock and/or options, warrants or
            other Common Stock purchase rights, and the Common Stock issued
            pursuant to such options, warrants or other rights to employees,
            officers or directors of, or consultants or advisors to the
            Corporation or any subsidiary


                                       16
<PAGE>

            pursuant to stock purchase or stock option plans or other
            arrangements that are approved by the Board; (D) shares of Common
            Stock issued pursuant to the exercise of options, warrants or
            convertible securities outstanding as of the Series F Original Issue
            Date; and (E) warrants to purchase Common Stock, and the Common
            Stock issued pursuant to such warrants, that are issued to holders
            of the Senior Notes due 2008 issued by the Corporation pursuant to
            an indenture between the Corporation and Norwest Bank, N.A. (the
            "Senior Notes"). The "Effective Price" of Additional Shares of
            Common Stock shall mean the quotient determined by dividing the
            total number of Additional Shares of Common Stock issued or sold, or
            deemed to have been issued or sold by the Corporation under this
            Section (4)(k), into the aggregate consideration received, or deemed
            to have been received by the Corporation for such issue under this
            Section (4)(k), for such Additional Shares of Common Stock.

            (l) Certificate of Adjustment. In each case of an adjustment or
      readjustment of the applicable Preferred Stock Price for the number of
      shares of Common Stock or other securities issuable upon conversion of the
      Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
      Stock, Series E Preferred Stock, or Series F Preferred Stock, if the
      Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
      Stock, Series E Preferred Stock, or Series F Preferred Stock is then
      convertible pursuant to this Section (4), the Corporation, at its expense,
      shall compute such adjustment or readjustment in accordance with the
      provisions hereof and prepare a certificate showing such adjustment or
      readjustment, and shall mail such certificate, by first class mail,
      postage prepaid, to each registered holder of Series B Preferred Stock,
      Series C Preferred Stock, Series D Preferred Stock, Series E Preferred
      Stock, or Series F Preferred Stock at the holder's address as shown in the
      Corporation's books. The certificate shall set forth such adjustment or
      readjustment, showing in detail the facts upon which such adjustment or
      readjustment is based, including a statement of (i) the consideration
      received or deemed to be received by the Corporation for any Additional
      Shares of Common Stock issued or sold or deemed to have been issued or
      sold, (ii) the Preferred Stock Price at the time in effect, (iii) the
      number of Additional Shares of Common Stock and (iv) the type and amount,
      if any, of other property which at the time would be received upon
      conversion of the Series B Preferred Stock, Series C Preferred Stock,
      Series D Preferred Stock, Series E Preferred Stock, or Series F Preferred
      Stock.

            (m) Notices of Record Date. Upon (i) any taking by the Corporation
      of a record of the holders of any class of securities for the purpose of
      determining the holders thereof who are entitled to receive any dividend
      or other distribution, or (ii) any Acquisition (as defined in Section
      (2)(g)) or other capital reorganization of the Corporation, any
      reclassification or recapitalization of the capital stock of the
      Corporation, any merger or consolidation of the Corporation with or into
      any other corporation, or any Asset Transfer (as defined in Section
      (2)(g)), or any voluntary or involuntary dissolution, liquidation or
      winding up of the Corporation, the Corporation shall mail to each holder
      of Preferred Stock at least twenty (20) calendar days prior to the record
      date specified therein a notice specifying (A) the date on which any such
      record is to be taken for the purpose of such dividend or distribution and
      a description of such dividend or distribution, (B) the date on which any
      such Acquisition, reorganization, reclassification, transfer,
      consolidation, merger, Asset Transfer, dissolution, liquidation or winding
      up is expected to become effective, and (C) the date, if any, that is to
      be fixed as to when the holders of record of Common Stock (or other
      securities) shall be entitled


                                       17
<PAGE>

      to exchange their shares of Common Stock (or other securities) for
      securities or other property deliverable upon such Acquisition,
      reorganization, reclassification, transfer, consolidation, merger, Asset
      Transfer, dissolution, liquidation or winding up.

            (n) Fractional Shares. No fractional shares of Common Stock shall be
      issued upon conversion of Series B Preferred Stock, Series C Preferred
      Stock, Series D Preferred Stock, Series E Preferred Stock, or Series F
      Preferred Stock. All shares of Common Stock (including fractions thereof)
      issuable upon conversion of more than one share of Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock, Series E
      Preferred Stock, or Series F Preferred Stock by a holder thereof shall be
      aggregated for purposes of determining whether the conversion would result
      in the issuance of any fractional share. If, after the aforementioned
      aggregation, the conversion would result in the issuance of any fractional
      share, the Corporation shall, in lieu of issuing any fractional share, pay
      cash equal to the product of such fraction multiplied by the Common
      Stock's fair market value (as determined in accordance with Section
      (2)(i)) on the date of conversion.

            (o) Reservation of Stock. The Corporation shall at all times reserve
      and keep available out of its authorized but unissued shares of Common
      Stock such number of its shares of Common Stock as shall from time to time
      be sufficient to effect the conversion of all outstanding shares of Series
      B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock,
      Series E Preferred Stock and Series F Preferred Stock and the exercise of
      all outstanding options and warrants of the Corporation. If at any time
      the number of authorized but unissued shares of Common Stock shall not be
      sufficient to effect the conversion of all then outstanding shares of the
      Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
      Stock, Series E Preferred Stock and Series F Preferred Stock or the
      exercise of all outstanding options and warrants, the Corporation will
      take such corporate action as may, in the opinion of its counsel, be
      necessary to increase its authorized but unissued shares of Common Stock
      to such number of shares as shall be sufficient for such purposes.

            (p) Notices. Any notice required by the provisions of this Section
      (4) shall be in writing and shall be deemed effectively given: (i) upon
      personal delivery to the party to be notified, (ii) when sent by confirmed
      telex or facsimile if sent during normal business hours of the recipient;
      if not, then on the next business day, (iii) five (5) business days after
      having been sent by registered or certified mail, return receipt
      requested, postage prepaid, or (iv) one (1) business day after deposit
      with a nationally recognized overnight courier, specifying next day
      delivery, with written verification of receipt. All notices shall be
      addressed to each holder of record at the address of such holder appearing
      on the books of the Corporation.

            (q) Payment of Taxes. The Corporation will pay all taxes (other than
      taxes based upon income) and other governmental charges that may be
      imposed with respect to the issue or delivery of shares of Common Stock
      upon conversion of shares of Series B Preferred Stock, Series C Preferred
      Stock, Series D Preferred Stock, Series E Preferred Stock, or Series F
      Preferred Stock, excluding any tax or other charge imposed in connection
      with any transfer involved in the issue and delivery of shares of Common
      Stock in a name other than that in which the shares of Series B Preferred
      Stock, Series C Preferred Stock, Series D Preferred Stock, Series E
      Preferred Stock, or Series F Preferred Stock so converted were registered.


                                       18
<PAGE>

      (5) Redemption.

      (a) Series F Preferred Stock.

            (i) Generally. In the event of (a) a breach by the Corporation of
      any of the terms of this Restated Certificate of Incorporation, the Bylaws
      of the Corporation, or the Amended and Restated Purchaser's Rights
      Agreement, dated July 2, 1999 by and among the Corporation and certain
      holders of its capital stock, as the same may be amended from time to time
      (including in connection with the issuance of Series F Preferred Stock),
      which has a material adverse effect on the holders of the Series F
      Preferred Stock that is not cured within fifteen (15) days of receipt of
      written notice by the Corporation from a holder of Series F Preferred
      Stock, or (b) the voluntary resignation (other than due to death or
      disability) prior to February 10, 2001 of (i) David E. Scott or (ii) any
      two of Jeffrey D. Shackelford, Bradley A. Moline, or Gregory C. Lawhon
      within six (6) months of one another (in the case of (a) or (b), a
      "Redemption Event"), a majority in interest of the Series F Preferred
      Stock may elect to demand in writing ("Redemption Demand") the redemption
      of all or any portion of the shares of Series F Preferred Stock, from any
      source of funds legally available therefor, at a redemption price per
      share (the "Series F Redemption Price") equal to the amount of the Series
      F Liquidation Preference. The redemption under this Section (5)(a) shall
      take place on a date (the "Series F Redemption Date") that is no later
      than thirty (30) days after the receipt by the Corporation of the
      Redemption Demand.

            (ii) Indenture Restriction. Notwithstanding the foregoing, the
      Corporation shall not be obligated to redeem the shares of Series F
      Preferred Stock for cash pursuant to Section (5)(a)(i), if such redemption
      or the existence of the redemption provision would violate the terms of
      the Indenture, dated as of June 23, 1998, by and between the Corporation
      and Norwest Bank Minnesota, National Association (as trustee), as amended,
      pursuant to which the Senior Notes were issued, until 91 days after the
      date on which the Senior Notes mature. If the Corporation is unable to
      redeem the Series F Preferred Stock for cash as set forth above, a
      majority in interest of the Series F Preferred Stock may elect to receive
      shares of Common Stock with a fair market value (as determined in
      accordance with Section (2)(i)) equal to the Series F Redemption Price.

            (iii) Procedure. At least 15 days prior to a Series F Redemption
      Date, written notice shall be mailed, first class postage prepaid, to each
      holder of record (at the close of business on the business day next
      preceding the day on which notice is given) of the Series F Preferred
      Stock to be redeemed, at the address last shown on the records of the
      Corporation for such holder, notifying such holder of the redemption to be
      effected, specifying the number of shares to be redeemed from such holder,
      the Series F Redemption Date, the Series F Redemption Price, whether or
      not the Corporation may redeem the shares for cash, or if not, the number
      of shares of Common Stock issuable in lieu of cash as set forth in Section
      (5)(a)(ii) above, the place at which payment or delivery may be obtained
      and calling upon such holder to surrender to the Corporation, in the
      manner and at the place designated, his


                                       19
<PAGE>

      certificate or certificates representing the shares to be redeemed (the
      "Series F Company Redemption Notice"). Except as provided in Section
      (5)(c), on or after the applicable Series F Redemption Date, each holder
      of Series F Preferred Stock to be redeemed shall surrender to the
      Corporation the certificate or certificates representing such shares, in
      the manner and at the place designated in the Series F Redemption Notice,
      and thereupon the Series F Redemption Price of such shares (in cash or
      shares of Common Stock, as applicable) shall be payable to the order of
      the person whose name appears on such certificate or certificates as the
      owner thereof and each surrendered certificate shall be canceled. In the
      event less than all the shares represented by any such certificate are
      redeemed, a new certificate shall be issued representing the unredeemed
      shares.

            (iv) Deposit of Redemption Price or Shares of Common Stock. Subject
      to the provisions set forth above, on or prior to each Series F Redemption
      Date, the Corporation shall deposit the Series F Redemption Price of all
      shares of Series F Preferred Stock designated for redemption in the Series
      F Redemption Notice and not yet redeemed with a bank or trust corporation
      as a trust fund for the benefit of the respective holder or holders of the
      shares designated for redemption and not yet redeemed, with irrevocable
      instructions and authority to the bank or trust corporation to pay the
      Series F Redemption Price for such shares to their respective holder or
      holders on or after the applicable Series F Redemption Date upon receipt
      of notification from the Corporation that such holder has surrendered his
      share certificate to the Corporation pursuant to Section (5)(a)(iii). As
      of the applicable Series F Redemption Date, the deposit shall constitute
      full payment of the shares to the holder or holders, and from and after
      the applicable Series F Redemption Date the shares so called for
      redemption shall be redeemed and shall be deemed to be no longer
      outstanding, and the holder or holders thereof shall cease to be
      stockholders with respect to such shares and shall have no rights with
      respect thereto except the rights to receive from the bank or trust
      corporation payment of the Series F Redemption Price of the shares,
      without interest, upon surrender of their certificates therefor. The
      balance of any moneys deposited by the Corporation pursuant to this
      Section (5)(a)(iv) remaining unclaimed at the expiration of two years
      following the applicable Series F Redemption Date shall thereafter be
      returned to the Corporation upon its request expressed in a resolution of
      its Board of Directors. In the event that the Corporation must issue new
      shares of Common Stock instead of cash pursuant to the provisions set
      forth in Section (5)(a)(ii), shares of Common Stock shall be delivered to
      the bank or trust corporation in lieu of such cash.

      (b) Series E Preferred Stock.

            (i) Generally. The Corporation, at any time and from time to time
      (each a "Series E Redemption Date"), may redeem all or any portion of the
      shares of Series E Preferred Stock, from any source of funds legally
      available therefor, at a redemption price per share (the "Series E
      Redemption Price") equal to (A) $4.50 per share for shares of Series E
      Preferred Stock redeemed pursuant to a Series E Redemption Date occurring
      on or before October 1, 1999, or (B) the Series E Liquidation Preference
      for shares of Series E Preferred Stock redeemed pursuant to


                                       20
<PAGE>

      a Series E Redemption Date occurring after October 1, 1999.

            (ii) Procedure. On each Series E Redemption Date, written notice
      shall be mailed, first class postage prepaid, to each holder of record (at
      the close of business on the business day next preceding the day on which
      notice is given) of the Series E Preferred Stock to be redeemed, at the
      address last shown on the records of the Corporation for such holder,
      notifying such holder of the redemption to be effected, specifying the
      number of shares to be redeemed from such holder, the Series E Redemption
      Date and the Series E Redemption Price (the "Series E Company Redemption
      Notice").

            (iii) Deposit of Redemption Price. As of the applicable Series E
      Redemption Date, the Corporation shall deposit the Series E Redemption
      Price of all shares of Series E Preferred Stock designated for redemption
      in the Series E Redemption Notice with a bank or trust corporation as a
      trust fund for the benefit of the respective holder or holders of the
      shares designated for redemption, with irrevocable instructions and
      authority to the bank or trust corporation to pay to the holders of record
      of the Series E Preferred Stock to be redeemed As of the applicable Series
      E Redemption Date, the deposit shall constitute full payment of the shares
      to the holder or holders, and from and after the applicable Series E
      Redemption Date the shares so called for redemption shall be redeemed and
      shall be deemed to be no longer outstanding, and the holder or holders
      thereof shall cease to be stockholders with respect to such shares and
      shall have no rights with respect thereto except the rights to receive
      from the bank or trust corporation payment of the Series E Redemption
      Price of the shares, without interest. The balance of any moneys deposited
      by the Corporation pursuant to this Section (5)(b)(iii) remaining
      unclaimed at the expiration of two years following the applicable Series E
      Redemption Date shall thereafter be returned to the Corporation upon its
      request expressed in a resolution of its Board of Directors.

      (c) Rights of Redeemed Stock; Default.

            (i) From and after the applicable Redemption Date, unless there
      shall have been a default in payment of the applicable Redemption Price
      (in cash or shares of Common Stock, as applicable), all rights of the
      holders of shares of Preferred Stock designated for redemption in the
      Company Redemption Notice as holders of Series E Preferred Stock or Series
      F Preferred Stock, as applicable (except the right to receive the
      applicable Redemption Price without interest upon surrender of their
      certificate or certificates) shall cease with respect to such shares, and
      such shares shall not thereafter be transferred on the books of the
      Corporation or be deemed to be outstanding for any purpose whatsoever.

            (ii) If the Corporation fails to redeem for any reason, including,
      but not limited to, the insufficiency of funds legally available for the
      redemption of shares, the total number of shares of Preferred Stock to be
      redeemed on such Redemption Date, those funds which are legally available
      will be used to redeem the maximum possible number of such shares ratably
      among the holders of such shares to be


                                       21
<PAGE>

            redeemed based upon their holdings of Series E Preferred Stock or
            Series F Preferred Stock, as applicable. The shares of Preferred
            Stock not redeemed shall remain outstanding and be entitled to all
            the rights and preferences provided herein or, with respect to the
            Series F Preferred Stock, may be otherwise converted into shares of
            Common Stock pursuant to the provisions set forth in Section
            (5)(a)(ii). At any time thereafter when additional funds of the
            Corporation are legally available for the redemption such shares of
            Preferred Stock such funds will immediately be used to redeem the
            balance of the shares which the Corporation has become obliged to
            redeem on any applicable Redemption Date, but which it has not
            redeemed.

            (6) Increasing Common Stock. Subject to the provisions of this
      Restated Certificate of Incorporation, the number of authorized shares of
      Common Stock may be increased or decreased (but not below the number of
      shares of Common Stock then outstanding, issuable upon the conversion of
      the Series B Preferred Stock, Series C Preferred Stock, Series D Preferred
      Stock, Series E Preferred Stock, Series F Preferred Stock and any other
      convertible securities of the Corporation, and issuable upon the exercise
      of all outstanding options and warrants), by the affirmative vote of the
      holders of a majority of the Common Stock and Preferred Stock, voting
      together as a single class.

            (7) No Reissuance of Series B Preferred Stock, Series C Preferred
      Stock, Series D Preferred Stock, Series E Preferred Stock or Series F
      Preferred Stock. No share or shares of Series B Preferred Stock, Series C
      Preferred Stock, Series D Preferred Stock, Series E Preferred Stock, or
      Series F Preferred Stock acquired by the Corporation by reason of
      redemption, purchase, or otherwise shall be reissued, and all such shares
      shall be canceled, retired and eliminated from the shares which the
      Corporation shall be authorized to issue.

      Fifth: The number of directors which shall constitute the whole Board of
Directors of the Corporation shall be no less than seven (7) nor more than
eleven (11), which number shall be fixed by the Board of Directors of the
Corporation from time to time.

      Sixth: The Board of Directors shall have power to make, and from time to
time alter, amend, or repeal the Bylaws of the Corporation; provided, however,
that (a) the stockholders shall have the paramount power to alter, amend and
repeal the Bylaws or adopt new Bylaws, exercisable by a majority vote of the
stockholders present in person or by proxy at any annual or special meeting of
stockholders, and (b) if and to the extent the stockholders exercise such power,
the Board of Directors shall not thereafter suspend, alter, amend or repeal the
Bylaws, or portions thereof, adopted by the stockholders, unless, in adopting
such Bylaws, or portions thereof, the stockholders otherwise provide.

      Seventh: A director of the Corporation shall not be personally liable to
the Corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (a) for any breach of the director's
duty of loyalty to the Corporation or its stockholders, (b) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (c) under the provisions of Section 174 of the Delaware
General Corporation Law and


                                       22
<PAGE>

amendments thereto, or (d) for any transaction from which the director derived
an improper personal benefit. If the Delaware General Corporation Law is amended
to authorize corporate action further eliminating or limiting the personal
liability of directors, then the liability of a director of the Corporation
shall be eliminated or limited to the fullest extent permitted by the Delaware
General Corporation Law, as so amended. No amendment, repeal or adoption of any
provision of this Restated Certificate of Incorporation inconsistent with this
Article Seventh shall apply or have any effect on the liability of any director
of the Corporation for or with respect to any acts or omissions of such director
occurring prior to such amendment, repeal, or adoption of any inconsistent
provision.

      Eighth: The directors of the Corporation need not be elected by written
ballot.

      Ninth:

      (a) Subject only to the exclusions set forth in paragraph (c) of this
Article Ninth, the Corporation shall hold harmless and indemnify, to the fullest
extent permitted by applicable law as it presently exists or may hereafter be
amended, each director or officer of the Corporation (each, an "Indemnitee")
against any and all liability and loss suffered and expenses (including
attorneys' fees), judgments, fines, excise taxes assessed with respect to any
employee benefit plan, or penalties and amounts paid in settlement actually and
reasonably incurred by Indemnitee in connection with any threatened, pending or
completed action, suit or proceeding, whether civil, criminal, administrative or
investigative (including an action by or in the right of the Corporation), to
which Indemnitee is, was or at any time becomes a party, or is threatened to be
made a party, by reason of the fact that Indemnitee is, was or at any time
becomes a director or officer of the Corporation, or is, or was serving, or at
any time serves at the request of the Corporation as a director or officer of
another corporation, partnership, joint venture, trust or other enterprise.

      (b) The expenses (including attorneys' fees) actually and reasonably
incurred by Indemnitee in defending any proceeding and any judgments, fines or
amounts to be paid in settlement shall be advanced by the Corporation at the
request of the Indemnitee and upon delivery to the Corporation of an undertaking
by such Indemnitee to repay all amounts so advanced if it shall ultimately be
determined that Indemnitee was not entitled to be indemnified or was not to be
fully indemnified.

      (c) No indemnity pursuant to this Article Ninth shall be paid by the
Corporation (i) for which payment is actually made to Indemnitee under a valid
and collectible insurance policy, except in respect of any excess beyond the
amount of payment under such insurance; (ii) for which Indemnitee is indemnified
by the Corporation pursuant to applicable law or otherwise than pursuant to this
Article Ninth; (iii) for an accounting of profits made from the purchase or sale
by Indemnitee of securities of the Corporation within the meaning of Section
16(b) of the Securities Exchange Act of 1934 and amendments thereto or similar
provisions of any state statutory law or common law; (iv) on account of
Indemnitee's conduct which is finally adjudged by a court to have been knowingly
fraudulent, deliberately dishonest or willful misconduct; or (v) if a final
decision by a court having jurisdiction in the matter shall determine that such
indemnity is not lawful.


                                       23
<PAGE>

      (d) All obligations of the Corporation contained herein shall continue
during the period Indemnitee is a director or officer of the Corporation (or is,
or was serving at the request of the Corporation as a director or officer of
another corporation, partnership, joint venture, trust or other enterprise) and
shall continue thereafter so long as Indemnitee shall be subject to any possible
claim or threatened, pending or completed action, suit or proceeding, whether
civil, criminal or investigative, by reason of the fact that Indemnitee was a
director or officer of the Corporation or serving in any other capacity referred
to herein.

      (e) Promptly after receipt by Indemnitee of notice of the commencement of
any action, suit or proceeding, Indemnitee will, if a claim in respect thereof
is to be made against the Corporation under this Article Ninth, notify the
Corporation of the commencement thereof; but the omission so to notify the
Corporation will not relieve it from any liability which it may have to
Indemnitee otherwise than under this Article Ninth. With respect to any such
action, suit or proceeding as to which Indemnitee notifies the Corporation of
the commencement thereof, the Corporation will be entitled to participate
therein at its own expense.

      (f) Except as otherwise provided below, to the extent that it may wish,
the Corporation jointly with any other indemnifying party similarly notified
will be entitled to assume the defense thereof with counsel reasonably
satisfactory to the Indemnitee. After notice from the Corporation to Indemnitee
of its election so to assume the defense thereof, the Corporation will not be
liable to Indemnitee under this Article Ninth for any legal or other expenses
subsequently incurred by Indemnitee in connection with the defense thereof other
than reasonable costs of investigation or as otherwise provided below.
Indemnitee shall have the right to employ its counsel in such action, suit or
proceeding, but the fees and expenses of such counsel, incurred after notice
from the Corporation of its assumption of the defense thereof, shall be at the
expense of Indemnitee unless (i) the employment of counsel by Indemnitee has
been authorized by the Corporation, (ii) Indemnitee shall have reasonably
concluded that there may be a conflict of interest between the Corporation and
Indemnitee in the conduct of the defense of such, subject to the approval of the
Corporation, which approval shall not be unreasonably withheld, or (iii) the
Corporation shall not in fact have employed counsel to assume the defense of
such action, in each of which cases the fees and expenses of counsel shall be at
the expense of the Corporation. The Corporation shall not be entitled to assume
the defense of any action, suit or proceeding brought by or on behalf of the
Corporation or as to which Indemnitee shall have made the conclusion provided
for in (ii) above.

      (g) The Corporation shall not be liable to indemnify Indemnitee under this
Article Ninth for any amounts paid in settlement of any action or claim effected
without its written consent. The Corporation shall not settle any action or
claim in any manner which would impose any penalty or limitation on Indemnitee
without Indemnitee's written consent. Neither the Corporation nor Indemnitee
will unreasonably withhold their consent to any proposed settlement.

      (h) In the event Indemnitee is required to bring any action to enforce
rights or to collect moneys due under this Article Ninth and is successful in
such action, the Corporation shall promptly


                                       24
<PAGE>

reimburse Indemnitee for all of Indemnitee's reasonable fees and expenses in
bringing and pursuing such action.

      (i) The provisions of this Article Ninth shall inure to the benefit of and
be enforceable by the Indemnitee's personal or legal representatives, executors,
administrators, heirs, devises and legatees.

      (j) The Corporation shall have power to purchase and maintain insurance,
at its expense, on behalf of any person who is or was an officer, director,
employee or agent of the Corporation or a subsidiary thereof, or is or was
serving at the request of the Corporation as an officer, director, partner,
member, employee, trustee or agent of another corporation, partnership, joint
venture, trust or other enterprise, including any employee benefit plan, against
any expense, liability or loss asserted against such person and incurred by such
person in any such capacity, or arising out of such person's status as such,
whether or not the Corporation would have the power to indemnify such person
against such expense, liability or loss under the Bylaws, the provisions of this
Article Ninth or the Delaware General Corporation Law.

      (k) The indemnification provided by this Article Ninth shall not be deemed
exclusive of any other rights to which a person seeking indemnification may be
entitled under any statute, the Bylaws, other provisions of this Restated
Certificate of Incorporation, agreement, vote of stockholders or disinterested
directors or otherwise, both as to action in such person's official capacity and
as to action in any other capacity while holding such office, and shall continue
as to a person who has ceased to be an officer or director of the Corporation or
a subsidiary thereof or an officer, director, partner, member, employee, trustee
or agent of another corporation, partnership, joint venture, trust or other
enterprise, including any employee benefit plan, and shall inure to the benefit
of the heirs, executors and administrators of such person.

      (l) This Article Ninth may be hereafter amended or repealed; provided,
however, that no amendment or repeal shall reduce, terminate, or otherwise
adversely affect the right of a person entitled to obtain indemnification
hereunder with respect to acts or omissions of such person occurring prior to
the effective date of such amendment or repeal.

      IN WITNESS WHEREOF, this Restated Certificate of Incorporation has been
executed on behalf of the Corporation this 17th day of March, 2000.


                                    BIRCH TELECOM, INC.


                                    By: /s/ Gregory C. Lawhon
                                       ________________________________________
                                       Gregory C. Lawhon, Senior Vice President


                                       25