EXHIBIT 4.1

                           CERTIFICATE OF DESIGNATIONS
                                       OF
                                 PREFERRED STOCK
                                       OF
                                NX NETWORKS, INC.

                                TO BE DESIGNATED
                     SERIES E 8% CONVERTIBLE PREFERRED STOCK


                        PURSUANT TO SECTION 151(G) OF THE
                GENERAL CORPORATION LAW OF THE STATE OF DELAWARE



         The undersigned DO HEREBY CERTIFY that the following resolution was

duly adopted by the Board of Directors of Nx Networks, Inc., a Delaware

corporation (the "Corporation"), at a meeting duly convened and held, at which a

quorum was present and acting throughout:

         "RESOLVED, that pursuant to the authority conferred on the Board of
     Directors of the Corporation (the "Board of Directors") by the
     Corporation's Certificate of Incorporation, the issuance of a series of
     preferred stock, $.05 par value per share, of the Corporation which shall
     consist of 19,000 shares of preferred stock be, and the same hereby is,
     authorized; and the Chief Executive Officer and Secretary or Assistant
     Secretary of the Corporation be, and they hereby are, authorized and
     directed to execute and file with the Secretary of State of the State of
     Delaware the Certificate of Designations of Preferred Stock of the
     Corporation fixing the designations, powers, preferences and rights of the
     shares of such series, and the qualifications, limitations or restrictions
     thereof (in addition to the designations, powers, preferences and rights,
     and the qualifications, limitations or restrictions thereof, set forth in
     the Certificate of Incorporation which may be applicable to the
     Corporation's preferred stock), as follows:

         1. NUMBER OF SHARES; DESIGNATION. A total of 19,000 shares of preferred
     stock, par value $.05 per share, of the Corporation are hereby designated
     as Series E 8% Convertible Preferred Stock (the "Series"). The number of
     authorized shares of the Series may be reduced by the Board of Directors by
     the filing of a certificate pursuant to the provisions of the General
     Corporation Law of the State of Delaware (the "GCL") stating that the
     reduction has been so authorized.

          2. RANK. The Series shall, with respect to payment of dividends,
     redemption payments and rights upon liquidation, dissolution or winding up
     of the affairs of the Corporation, rank:




         (i)  Senior and prior to the Common Stock, par value $.05 per share, of
              the Corporation (the "Common Stock"), and any additional series of
              preferred stock which may in the future be issued by the
              Corporation and are designated in the amendment to the Certificate
              of Incorporation or the certificate of designations establishing
              such additional preferred stock as ranking junior to the shares of
              the Series. Any shares of the Corporation's capital stock which
              are junior to the shares of the Series with respect to the payment
              of dividends are hereinafter referred to as "Junior Dividend
              Shares" and any shares which are junior to the shares of the
              Series with respect to redemption, payment and rights upon
              liquidation, dissolution or winding up of the affairs of the
              Corporation are hereinafter referred to as "Junior Liquidation
              Shares."

         (ii) PARRI PASSU with any additional series of preferred stock which
              may in the future be issued by the Corporation and are designated
              in the amendment to the Certificate of Incorporation or the
              certificate of designations establishing such additional preferred
              stock as ranking equal to the shares of the Series or which do not
              state they are Junior Dividend Shares or Senior Dividend Shares
              (as defined below). Any shares of the Corporation's capital stock
              which are equal to the shares of the Series with respect to the
              payment of dividends are hereinafter referred to as "Parity
              Dividend Shares" and any shares which are equal to the shares of
              the Series with respect to redemption, payment and rights upon
              liquidation, dissolution or winding up of the affairs of the
              Corporation are hereinafter referred to as "Parity Liquidation
              Shares." The shares of the Series shall rank PARI PASSU with the
              Series B Preferred Stock, Series C Preferred Stock and Series D
              Preferred Stock of the Corporation.

         (iii)Junior to any additional series of preferred stock which may in
              the future be issued by the Corporation and are designated in the
              amendment to the Certificate of Incorporation or the certificate
              of designations establishing such additional preferred stock as
              ranking senior to the shares of the Series. Any shares of the
              Corporation's capital stock which are senior to the shares of the
              Series with respect to the payment of dividends are hereinafter
              referred to as "Senior Dividend Shares" and any shares which are
              senior to the shares of the Series with respect to redemption,
              payment and rights upon liquidation, dissolution or winding up of
              the affairs of the Corporation are hereinafter referred to as
              "Senior Liquidation Shares."

     The Corporation may not issue additional shares of preferred stock which
     are not (a) Junior Stock (as defined in paragraph 3(a) below) or (b) both
     Parity Dividend Shares and Parity Liquidation Shares without the consent of
     the holders of a majority of the outstanding shares of the Series.

         3. DIVIDENDS. (a) The dividend rate on shares of the Series shall be
     $10.12 per share per annum. Dividends on shares of the Series shall be
     fully cumulative, accruing, without interest, from the date of original
     issuance of the Series through the date of redemption or conversion
     thereof. Dividends on the shares of the Series shall cumulate quarterly on


                                       2


     July 31, October 31, January 31 and April 30 of each year. Accrued
     dividends shall be paid in arrears, when, as and if declared by the Board
     of Directors out of funds legally available for the payment of dividends,
     on April 30 of each year, commencing April 30, 2002, except that if such
     date is not a business day then the dividend shall be payable on the first
     immediately succeeding business day (as used herein, the term "business
     day" shall mean any day except a Saturday, Sunday or day on which banking
     institutions are legally authorized to close in Herndon, Virginia) (each
     such annual payment period being hereinafter referred to as a "Dividend
     Period"). Dividends shall be payable in cash or Common Stock, at the
     discretion of the Corporation. The means of payment (cash or Common Stock)
     of each dividend shall be designated by the Board of Directors at the time
     it fixes the record date for determining holders of shares of the Series
     entitled to receive such dividend payment. Each dividend shall be paid to
     the holders of record of shares of the Series as they appear on the stock
     register of the Corporation on the record date, not less than 10 nor more
     than 60 days preceding the payment date thereof, as shall be fixed by the
     Board of Directors. If any dividend is designated as being payable in
     Common Stock, the amount of Common Stock issued in satisfaction of such
     dividend shall be determined by dividing the amount of the dividend payable
     with respect to each share of the Series by the Current Market Price (as
     defined in Section 10) for the Common Stock as of the close of business on
     the business day the Board of Directors fixes the record date for
     determining the holders entitled to receive such dividend. Dividends
     payable for each Dividend Period shall be computed on the basis of a
     360-day year of twelve 30-day months and rounded to the nearest cent. No
     fractional share of Common Stock shall be issued with respect to any
     dividend paid in Common Stock. The aggregate number of shares issuable to
     each holder of shares of the Series will be calculated, and in lieu of
     issuing a fractional share the Corporation shall pay the cash value of such
     fractional share as determined by reference to the Current Market Price
     used for purposes of calculating the number of shares of Common Stock to be
     issued in such dividend. Dividends on account of arrearages for any past
     Dividend Period may be declared and paid at any time, without reference to
     any regular dividend payment date, to holders of record on such date, not
     exceeding 45 days preceding the payment date thereof, as may be fixed by
     the Board of Directors of the Corporation. Dividends shall accrue
     regardless of whether the Corporation has earnings, whether there are funds
     legally available therefor and whether declared. No interest shall be
     payable with respect to any dividend payment that may be in arrears.
     Holders of Shares of the Series called for redemption between the close of
     business on a dividend payment record date and the close of business on the
     corresponding dividend payment date shall, in lieu of receiving such
     dividend on the dividend payment date fixed therefor, receive such dividend
     payment on the date fixed for redemption together with all other accrued
     and unpaid dividends to the date fixed for redemption. The holders of
     shares of the Series shall be not be entitled to any dividends other than
     the dividends provided for in this paragraph 3.

         (b) No dividends, except as described in the next succeeding sentence,
     shall be declared or paid or set apart for payment on any Parity Dividend
     Shares for any period unless full cumulative dividends have been or
     contemporaneously are declared and paid or declared and set aside for
     payment for all accrued dividends with respect to the Series through the


                                       3


     most recent Dividend Period ending on or prior to the date of payment, or
     setting apart for payment, of such dividends on such Parity Dividend
     Shares. Unless dividends accrued and payable but unpaid on shares of the
     Series and any Parity Dividend Shares at the time outstanding have been
     paid in full, all dividends declared by the Corporation upon shares of the
     Series or Parity Dividend Shares shall be declared PRO RATA with respect to
     all such shares, so that the amounts of any dividends declared on shares of
     the Series and the Parity Dividend Shares shall in all cases bear to each
     other the same ratio that, at the time of the declaration, all accrued and
     payable but unpaid dividends on shares of the Series and the other Parity
     Dividend Shares, respectively, bear to each other.

         (c) If at any time the Corporation has failed to (x) pay or set apart
     for payment all accrued dividends on any shares of the Series through the
     then most recent Dividend Period and (y) set apart for payment an amount in
     cash equal to the scheduled dividend payments for each of the next two
     Dividend Periods, the Corporation shall not, and shall not permit any
     corporation or other entity directly or indirectly controlled by the
     Corporation to:

              (i) declare or pay or set aside for payment any dividend or other
                  distribution on or with respect to the Junior Dividend Shares,
                  whether in cash, securities, obligations or otherwise (other
                  than dividends or distributions paid in shares of capital
                  stock of the Corporation ranking junior to shares of the
                  Series both as to the payment of dividends and as to rights in
                  liquidation, dissolution or winding up of the affairs of the
                  Corporation ("Junior Stock"), or options, warrants or rights
                  to subscribe for or purchase shares of Junior Stock); or

              (ii)redeem, purchase or otherwise acquire, or pay into, set apart
                  money or make available for a sinking or other analogous fund
                  for the redemption, purchase or other acquisition of, any
                  shares of the Series (unless all of the shares of the Series
                  are concurrently redeemed), Parity Dividend Shares, Parity
                  Liquidation Shares or Shares of Junior Stock for any
                  consideration (except by conversion into or exchange for
                  Junior Stock),

     unless, in each such case, all dividends accrued and payable on shares of
     the Series through the most recent Dividend Period and on any Parity
     Dividend Shares have been or contemporaneously are declared and paid in
     full.

         (c) Any reference to "distribution" contained in this paragraph 3 shall
     not be deemed to include any distribution made in connection with any
     liquidation, dissolution or winding up of the Corporation, whether
     voluntary or involuntary.

         4. LIQUIDATION. (a) The liquidation value per share of shares of the
     Series, in case of the voluntary or involuntary liquidation, dissolution or
     winding-up of the affairs of the Corporation, shall be $126.50 per share,
     plus an amount equal to the cash value of dividends accrued and unpaid
     thereon, whether or not declared, to the payment date (such aggregate
     amount being hereinafter referred to as the "Liquidation Amount").



                                       4


         (b) In the event of any voluntary or involuntary liquidation,
     dissolution or winding-up of the Corporation, the holders of shares of the
     Series (i) shall not be entitled to receive the liquidation value of the
     shares held by them until the liquidation value of all Senior Liquidation
     Shares shall have been paid in full and (ii) shall be entitled to receive
     the liquidation value of such shares held by them in preference to and in
     priority over any distributions upon the Junior Liquidation Shares. Upon
     payment in full of the liquidation value to which the holders of shares of
     the Series are entitled, the holders of shares of the Series will not be
     entitled to any further participation in any distribution of assets by the
     Corporation. If the assets of the Corporation are not sufficient to pay in
     full the liquidation value payable to the holders of shares of the Series
     and the liquidation value payable to the holders of any Parity Liquidation
     Shares, the holders of all such shares shall share ratably in such
     distribution of assets in accordance with the amounts that would be payable
     on the distribution if the amounts to which the holders of shares of the
     Series and the holders of Parity Liquidation Shares are entitled were paid
     in full.

         (c) Neither a consolidation or merger of the Corporation with or into
     any other entity, nor a merger of any other entity with or into the
     Corporation, nor a sale or transfer of all or any part of the Corporation's
     assets for cash or securities or other property shall be considered a
     liquidation, dissolution or winding-up of the Corporation within the
     meaning of this paragraph 4.

         (d) Written notice of any liquidation, dissolution or winding up of the
     Corporation, stating the payment date or dates when and the place or places
     where the amounts distributable in such circumstances shall be payable,
     shall be given by first class mail, postage prepaid, not less than 30 days
     prior to any payment date stated therein, to the holders of record of
     shares of the Series at their respective addresses as the same shall appear
     on the books of the transfer agent with respect to the Series.

         5. OPTIONAL REDEMPTION. (a) Shares of the Series will be redeemable at
     the option of the Corporation, in whole or in part, from and after the time
     that (x) the Current Closing Market Price for the Common Stock for a period
     of 10 consecutive trading days equals or exceeds $5.00 per share and (y)
     the Common Stock underlying the Shares can be sold by the holder thereof
     without restriction on resale. The redemption price will be payable in cash
     and equal to $132.83 per share, together with an amount equal to the
     dividends accrued and unpaid thereon, whether or not declared, to the
     redemption date. The aggregate payment to each holder of shares of the
     Series to be redeemed will be rounded to the nearest cent. Notwithstanding
     the foregoing, if the date fixed for redemption occurs after a record date
     for a dividend and prior to the corresponding payment date, such dividend
     shall be paid on the payment date and the amount payable with respect to
     each share of the Series redeemed shall not include the amount of the
     dividend to be so paid.

         (b) Not less than 30 nor more than 60 days prior to the date fixed for
     any redemption of shares of the Series pursuant to this paragraph 5, a
     notice of redemption shall be mailed by registered mail, return receipt
     requested, to each holder of shares of the Series to be redeemed at such
     holder's last address as it appears on the books of the transfer agent for


                                       5


     the Series. Such notice shall state: (i) that the Corporation has elected
     to redeem all or a portion of the shares of the Series, as specified in
     such notice, (ii) the redemption price, (iii) the redemption date, (iv)
     that, unless the Corporation defaults in the payment of the redemption
     price, all shares of the Series called for redemption shall cease to accrue
     dividends after the redemption date and shall cease to be outstanding after
     such date and (v) any other information required by applicable law to be
     included therein and any other procedures that a holder of shares of the
     Series must follow to receive payment for their redeemed shares. Neither
     failure to mail such notice, nor any defect therein or in the mailing
     thereof, to any particular holder shall affect the sufficiency of the
     notice or the validity of the proceedings for redemption with respect to
     any other holder. On or after the redemption date, each holder of shares of
     the Series to be redeemed shall present and surrender such holder's
     certificate or certificates for such shares to the Corporation at the place
     designated in the redemption notice and thereupon the redemption price of
     the shares shall be paid to or on 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 case less than all the shares
     represented by any such certificate are redeemed, a new certificate shall
     be issued to the holder representing the unredeemed shares of the Series.

         (c) If a notice of redemption has been given pursuant to this paragraph
     5 and if, on or before the date fixed for redemption, the funds necessary
     for such redemption shall have been set aside by the Corporation, separate
     and apart from its other funds, in trust for the PRO RATA benefit of the
     holders of the shares of the Series so called for redemption, then,
     notwithstanding that any certificates for such shares have not been
     surrendered for cancellation, on the redemption date dividends shall cease
     to accrue on the shares of the Series to be redeemed, and at the close of
     business on the redemption date the holders of such shares shall cease to
     be stockholders with respect to those shares, shall have no interest in or
     claims against the Corporation by virtue thereof and shall have no voting
     or other rights with respect thereto, except the right to receive the
     moneys payable upon such redemption, without interest thereon, upon
     surrender (and endorsement, if required by the Corporation) of their
     certificates, and the shares evidenced thereby shall no longer be
     outstanding. Subject to applicable escheat laws, any moneys so set aside by
     the Corporation and unclaimed at the end of two years from the redemption
     date shall revert to the Corporation, after which reversion the holders of
     such shares so called for redemption shall look only to the Corporation for
     the payment of the redemption price. Any interest accrued on funds so
     deposited shall be paid to the Corporation from time to time.

         (d) If a notice of redemption has been given pursuant to this paragraph
     5, and any holder of shares of the Series shall, prior to the close of
     business on the date fixed for redemption, give written notice to the
     Corporation pursuant to paragraph 7 below of the conversion of any or all
     of the shares to be redeemed held by the holder, then such redemption shall
     not become effective as to such shares to be converted and such conversion
     shall become effective as provided in paragraph 7 below, whereupon any
     funds deposited by the Corporation, or on its behalf, with a payment agent
     or segregated and held in trust by the Corporation for the redemption of


                                       6


     such shares shall (subject to any right of the holder of such shares to
     receive the dividend payable thereon as provided in paragraph 7 below)
     immediately upon such conversion be returned to the Corporation or, if then
     held in trust by the Corporation, shall be discharged from the trust.

         (e) In every case of redemption of less than all of the outstanding
     shares of the Series pursuant to this paragraph 5, the shares to be
     redeemed shall be selected PRO RATA or by lot or in such other manner as
     the Board of Directors may determine, as may be prescribed by resolution of
     the Board of Directors of the Corporation, provided that only whole shares
     shall be selected for redemption. Notwithstanding the foregoing, the
     Corporation shall not redeem any of the shares of the Series at any time
     outstanding until all dividends accrued and in arrears upon all shares of
     the Series then outstanding shall have been paid for all past dividend
     periods.

         6.   NO SINKING FUND.

          The shares of the Series are not subject to mandatory redemption or
     sinking fund requirements.

         7. CONVERSION. (a) Holders of shares of the Series will have the right,
     exercisable at any time after May 19, 2001, and prior to redemption of such
     shares (as described in paragraph 5), to convert shares of the Series into
     shares of Common Stock (calculated as to each conversion to the nearest
     1/100th of a share) at the Conversion Price (as defined in paragraph 10).
     The number of shares of Common Stock into which each share of the Series
     shall be convertible shall be determined by dividing $126.50, subject to
     proportional adjustment to reflect any split or consolidation of the Common
     Stock or any dividend payable on the Common Stock in additional shares of
     Common Stock (the "Conversion Amount"), by the Conversion Price then in
     effect. In the case of shares of the Series called for redemption,
     conversion rights will expire at the close of business on the business day
     next preceding the redemption date. Upon conversion of shares of the
     Series, the Corporation will pay to the holder of the converted shares an
     amount equal to the dividends accrued but unpaid thereon through the date
     the notice of conversion is delivered to the Corporation. Such payment
     shall be made in cash, or at the option of the Corporation, in Common Stock
     valued at the Current Market Price of the Common Stock on the date the
     notice of conversion is delivered to the Corporation. Notwithstanding the
     foregoing, no such payment of accrued dividends will be made if the notice
     of conversion and the related documents required by paragraph 7(b) below
     are delivered after a record date for the payment of dividends and before
     the related dividend payment date; instead holders of record of shares of
     the Series on a record date fixed for the payment of a dividend on such
     shares shall be entitled to receive the dividend notwithstanding the
     conversion of the shares prior to the dividend payment date. A share of the
     Series may not be converted in part.

         (b) In order to exercise the conversion right, the holder of each share
     of the Series to be converted shall surrender the certificate representing
     such share, duly endorsed or assigned to the Corporation or in blank, at
     the office of the Corporation in Herndon, Virginia (or such other address
     as the Corporation may designate) or the Corporation's transfer agent and


                                       7


     shall give written notice to the Corporation in the form set forth on the
     reverse of the stock certificates for the shares of the Series that such
     holder elects to convert the shares represented by such certificate or a
     portion thereof. Such notice shall also state the name or names (with
     address) in which the certificate or certificates for the shares of Common
     Stock which shall be issuable upon such conversion shall be issued, and
     shall be accompanied by funds in an amount sufficient to pay any transfer
     or similar tax required by the provisions of paragraph 7(e) below. Each
     share surrendered for conversion shall, unless the shares issuable on
     conversion are to be issued in the same name as the name in which such
     share of the Series is registered, be duly endorsed by, or be accompanied
     by instruments of transfer (in each case, in form reasonably satisfactory
     to the Corporation), duly executed by the holder or such holder's duly
     authorized attorney-in-fact.

         (c) As promptly as practicable after the surrender of certificates for
     shares of the Series for conversion and the receipt of such notice and
     funds, if any, as aforesaid, the Corporation shall issue and shall deliver
     to such holder, or on such holder's written order, a certificate or
     certificates for the number of shares of Common Stock issuable upon the
     conversion of such shares of the Series in accordance with the provisions
     of this paragraph 7, and a check or cash in respect of any fractional
     interest in respect of a share of Common Stock arising upon such
     conversion, as provided in paragraph 7(d) below. Except as provided in
     paragraph 6(a) below, each conversion with respect to any shares of the
     Series shall be deemed to have been effected immediately prior to the close
     of business on the date on which the certificates for shares of the Series
     shall have been surrendered (accompanied by the funds, if any, required by
     paragraph 7(e) below) and such notice and assignment, if any, shall have
     been received by the Corporation as aforesaid, and the person or persons
     entitled to receive the Common Stock issuable upon such conversion shall be
     deemed for all purposes to be the record holder or holders of such Common
     Stock upon that date.

         (d) No fractional shares of Common Stock or scrip representing
     fractional shares shall be issued upon conversion of shares of the Series.
     If more than one share of the Series shall be surrendered for conversion at
     one time by the same holder, the number of full shares of Common Stock
     issuable upon conversion thereof shall be computed on the basis of the
     aggregate number of shares of the Series so surrendered. Instead of any
     fractional share of Common Stock otherwise issuable upon conversion of any
     shares of the Series, the Corporation shall pay a cash adjustment in
     respect to such fraction in an amount equal to the same fraction of the
     Current Market Price of the Common Stock at the close of business on the
     day of conversion.

         (e) If a holder converts shares of the Series, the Corporation shall
     pay any and all documentary, stamp or similar issue or transfer tax payable
     in respect of the issue or delivery of the shares of the Series (or any
     other securities issued on account thereof pursuant hereto) or Common Stock
     upon the conversion; PROVIDED, HOWEVER, the Corporation shall not be
     required to pay any such tax that may be payable because any such shares
     are issued in a name other than the name of the holder.



                                       8


         (f) The Corporation shall reserve out of its authorized but unissued
     Common Stock or its Common Stock held in treasury sufficient shares of
     Common Stock to permit the conversion of all of the outstanding shares of
     the Series. The Corporation shall from time to time, in accordance with the
     GCL, increase the authorized amount of its Common Stock if at any time the
     authorized amount of its Common Stock remaining unissued shall not be
     sufficient to permit the conversion of all shares of the Series at the time
     outstanding. If any shares of Common Stock required to be reserved for
     issuance upon conversion of shares of the Series hereunder require
     registration with or approval of any governmental authority under any
     federal or state law before the shares may be issued upon conversion, the
     Corporation shall in good faith and as expeditiously as possible endeavor
     to cause the shares to be so registered or approved. All shares of Common
     Stock delivered upon conversion of the shares of the Series will, upon
     delivery, be duly authorized and validly issued, fully paid and
     nonassessable, free from all taxes, liens and charges with respect to the
     issue thereof.

          (g) The Conversion Price shall be subject to adjustment from time to
     time as follows:

              (i) In the event that the Corporation shall (A) pay a dividend or
                  make a distribution, in shares of Common Stock, on any class
                  of Capital Stock of the Corporation or any subsidiary which is
                  not directly or indirectly wholly owned by the Corporation,
                  (B) split or subdivide its outstanding Common Stock into a
                  greater number of shares or (C) combine its outstanding Common
                  Stock into a smaller number of shares, then in each such case
                  the Conversion Price in effect immediately prior thereto shall
                  be adjusted so that the holder of each share of the Series
                  thereafter surrendered for conversion shall be entitled to
                  receive the number of shares of Common Stock that such holder
                  would have owned or have been entitled to receive after the
                  occurrence of any of the events described above had such share
                  of the Series been converted immediately prior to the
                  occurrence of such event. An adjustment made pursuant to this
                  paragraph 7(g)(i) shall become effective immediately after the
                  close of business on the record date in the case of a dividend
                  or distribution (except as provided in paragraph 7(k) below)
                  and shall become effective immediately after the close of
                  business on the effective date in the case of such
                  subdivision, split or combination, as the case may be. Any
                  shares of Common Stock issuable in payment of a dividend shall
                  be deemed to have been issued immediately prior to the close
                  of business on the record date for such dividend for purposes
                  of calculating the number of outstanding shares of Common
                  Stock under clauses (ii) and (iii) below.

              (ii)In the event that the Corporation shall commit to issue or
                  distribute Common Stock and/or issue rights, warrants, options
                  or convertible or exchangeable securities entitling the holder
                  thereof to subscribe for or purchase, convert into or exchange
                  for Common Stock, in any such case at a price per share
                  (calculated as set forth below) less than the Current Market
                  Price per share on the earliest of (i) the date the
                  Corporation shall enter into a firm contract for such issuance
                  or distribution, (ii) the record date for the determination of


                                       9


                  stockholders entitled to receive any such rights, warrants,
                  options or convertible or exchangeable securities, if
                  applicable, or (iii) the date of actual issuance or
                  distribution of any such Common Stock or rights, warrants,
                  options or convertible or exchangeable securities (provided
                  that the issuance of Common Stock upon the exercise of rights,
                  warrants, options or convertible or exchangeable securities
                  will not cause an adjustment in the Conversion Price if no
                  such adjustment would have been required at the time such
                  right, warrant, option or convertible or exchangeable security
                  was issued), then the Conversion Price in effect immediately
                  prior to such earliest date shall be adjusted so that the
                  Conversion Price shall equal the price determined by
                  multiplying the Conversion Price in effect immediately prior
                  to such earliest date by the fraction:

                  (x) whose numerator shall be the number of shares of Common
                      Stock outstanding on such date plus the number of shares
                      which the aggregate offering price of the total number of
                      shares so offered would purchase at such Current Market
                      Price (such amount, with respect to any such rights,
                      warrants, options or convertible or exchangeable
                      securities, determined by multiplying the total number of
                      shares subject thereto by the exercise price of such
                      rights, warrants, options or convertible or exchangeable
                      securities and dividing the product so obtained by the
                      Current Market Price), and

                  (y) whose denominator shall be the number of shares of Common
                      Stock outstanding on such date plus the number of
                      additional shares of Common Stock to be issued and/or
                      distributed or receivable upon exercise of any such right,
                      warrant, option or convertible or exchangeable security.

Such adjustment shall be made successively whenever any such Common Stock,
rights, warrants, options or convertible or exchangeable securities are issued
or distributed. In determining whether any rights, warrants or options entitle
the holders to subscribe for or purchase shares of Common Stock at less than
such Current Market Price, and in determining the aggregate offering price of
shares of Common Stock so issued or distributed, there shall be taken into
account any consideration received by the Corporation for such Common Stock,
rights, warrants, options, or convertible or exchangeable securities, the value
of such consideration, if other than cash, to be determined by the Board of
Directors, whose determination shall be conclusive and described in a
certificate filed with the records of corporate proceedings of the Corporation.
If any right, warrant, option or convertible or exchangeable security to
purchase or acquire Common Stock, the issuance of which resulted in an
adjustment in the Conversion Price pursuant to this subsection (b) shall expire
and shall not have been exercised, the Conversion Price shall immediately upon
such expiration be recomputed to the Conversion Price which would have been in
effect had the adjustment of the Conversion Price made upon the issuance of such
right, warrant, option or convertible or exchangeable security been made on the
basis of offering for subscription, purchase or issuance, as the case may be,
only of that number of shares of Common Stock actually purchased or issued upon

                                       10



the actual exercise of such right, warrant, option or convertible or
exchangeable securities. For purposes of calculating the price per share of any
security pursuant to this Section 7(g)(ii), the issuance of rights, warrants,
options, or convertible or exchangeable securities in conjunction with an
issuance or distribution of Common Stock will be ascribed no value if (x) the
number of shares of Common Stock issuable pursuant to such rights, warrants,
options, or convertible or exchangeable securities does not exceed 20% of the
number of shares of Common Stock to with respect to which they shall have been
issued and (y) the exercise or conversion price of such rights, warrants,
options, or convertible or exchangeable securities is at least 125% of the
Current Market Price on the date the related Common Stock is issued. In all
other cases, the price per share of the security with respect to which such
rights, warrants, options, or convertible or exchangeable securities is issued
shall be reduced by the value of such rights, warrants, options, or convertible
or exchangeable securities determined by reference to a Black-Scholes pricing
model. In addition to the foregoing, if the Corporation shall commit to issue or
distribute rights, warrants, options or convertible or exchangeable securities
entitling the holder thereof to subscribe for or purchase, convert into or
exchange for Common Stock, in any such case at a price per share that is equal
to or in excess of the Current Market Price per share on the earliest of (i) the
date the Corporation shall enter into a firm contract for such issuance or
distribution, (ii) the record date for the determination of stockholders
entitled to receive any such rights, warrants, options or convertible or
exchangeable securities, if applicable, or (iii) the date of actual issuance or
distribution of any such rights, warrants, options or convertible or
exchangeable securities (the "Commitment Date") (such that no adjustment to the
Conversion Price is made on the Commitment Date pursuant to the foregoing
provisions of this paragraph 7(g)(ii)) but which thereafter may become
exerciseable or exchangeable for Common Stock at a price per share less than the
Current Market Price per share on the Commitment Date (other than by reason of
the anit-dilution provisions thereof), then the issue of Common Stock after the
Commitment Date pursuant to such rights, warrants, options or convertible or
exchangeable securities at a price per share less than the Current Market Price
on the Commitment Date shall be deemed to be a new issue of Common Stock as of
the date of such exercise or exchange and, for this purpsose the Current Market
Price on the date of such exercise or exchange shall be deemed to be equal to
the Current Market Price on the Commitment Date related to such rights,
warrants, options or convertible or exchangeable.


              (iii) No adjustment in the Conversion Price shall be required
                  unless the adjustment would require an increase or decrease of
                  at least 1% in the Conversion Price then in effect; PROVIDED,
                  HOWEVER, that any adjustments that by reason of this paragraph
                  7(g)(i) are not required to be made shall be carried forward
                  and taken into account in any subsequent adjustment. All
                  calculations under this paragraph 7(g)(i) shall be made to the
                  nearest cent or nearest 1/100th of a share.

              (iv)Notwithstanding anything to the contrary set forth in this
                  paragraph 7(g), no adjustment shall be made to the Conversion
                  Price upon (A) the issuance of shares of Common Stock pursuant
                  to any compensation or incentive plan for officers, directors,
                  employees or consultants of the Corporation which plan has
                  been approved by the Compensation Committee of the Board of
                  Directors (or if there is no such committee then serving, by


                                       11


                  the majority vote of the Directors then serving who are not
                  employees or officers of the Corporation, a 5% or greater
                  stockholder of the Corporation or an officer, employee or
                  Affiliate or Associate (as defined in paragraph 10 below) of
                  any such 5% or greater stockholder) (unless the exercise price
                  thereof is changed after the date hereof other than solely by
                  operation of the anti-dilution provisions thereof or by the
                  Compensation Committee of the Board of Directors or, if
                  applicable, the Board of Directors and, if required by law,
                  the stockholders of the Corporation as provided in this clause
                  (A)), (B) the issuance of shares to the former owners of
                  AetherWorks Corporation in furtherance of the acquisition
                  agreement dated December 31, 1999 by and among AetherWorks
                  Corporation, Nx Networks, Inc. and Nx1 Acquisition Corp. or
                  (C) the issuance of Common Stock upon the conversion or
                  exercise of the options or warrants of the Corporation
                  outstanding on April 1, 2001, unless the conversion or
                  exercise price thereof is changed after April 1, 2001 (other
                  than solely by operation of the anti-dilution provisions
                  thereof).

              (v) The Corporation from time to time may reduce the Conversion
                  Price by any amount for any period of time in the discretion
                  of the Board of Directors. A voluntary reduction of the
                  Conversion Price does not change or adjust the conversion
                  price otherwise in effect for purposes of this paragraph 7(g).

              (vii) In the event that, at any time as a result of an adjustment
                  made pursuant to paragraph 7(g)(i) through 7(g)(iii) above,
                  the holder of any share of the Series thereafter surrendered
                  for conversion shall become entitled to receive any shares of
                  the Corporation other than shares of the Common Stock,
                  thereafter the number of such other shares so receivable upon
                  conversion of any share of the Series shall be subject to
                  adjustment from time to time in a manner and on terms as
                  nearly equivalent as practicable to the provisions with
                  respect to the Common Stock contained in paragraphs 7(g)(i)
                  through 7(g)(vi) above, and the other provisions of this
                  paragraph 7(g)(vii) with respect to the Common Stock shall
                  apply on like terms to any such other shares.

         (h) In case of any reclassification of the Common Stock (other than in
     a transaction to which paragraph 7(g)(i) applies), any consolidation of the
     Corporation with, or merger of the Corporation into, any other entity, any
     merger of another entity into the Corporation (other than a merger that
     does not result in any reclassification, conversion, exchange or
     cancellation of outstanding shares of Common Stock of the Corporation), any
     sale or transfer of all or substantially all of the assets of the
     Corporation or any compulsory share exchange, pursuant to which share
     exchange the Common Stock is converted into other securities, cash or other
     property, then lawful provision shall be made as part of the terms of such
     transaction whereby the holder of each share of the Series then outstanding
     shall have the right thereafter, during the period such share shall be
     convertible, to convert such share only into the kind and amount of
     securities, cash and other property receivable upon the reclassification,
     consolidation, merger, sale, transfer or share exchange by a holder of the
     number of shares of Common Stock of the Corporation into which a share of


                                       12


     the Series might have been converted immediately prior to the
     reclassification, consolidation, merger, sale, transfer or share exchange
     assuming that such holder of Common Stock failed to exercise rights of
     election, if any, as to the kind or amount of securities, cash or other
     property receivable upon consummation of such transaction subject to
     adjustment as provided in paragraph 7(g) above following the date of
     consummation of such transaction. As a condition to any such transaction,
     the Corporation or the person formed by the consolidation or resulting from
     the merger or which acquires such assets or which acquires the
     Corporation's shares, as the case may be, shall make provisions in its
     certificate or articles of incorporation or other constituent document to
     establish such right. The certificate or articles of incorporation or other
     constituent document shall provide for adjustments which, for events
     subsequent to the effective date of the certificate or articles of
     incorporation or other constituent document, shall be as nearly equivalent
     as may be practicable to the adjustments provided for in this paragraph 7.
     The provisions of this paragraph 7(h) shall similarly apply to successive
     reclassifications, consolidations, mergers, sales, transfers or share
     exchanges.

         (i)  If:

              (i) the  Corporation  shall take any action which would  require
                  an adjustment in the Conversion Price pursuant to
                  Section 7(g); or

              (ii)the Corporation shall authorize the granting to the holders
                  of its Common Stock generally of rights or warrants to
                  subscribe for or purchase any shares of any class or any other
                  rights or warrants; or

              (iii) there shall be any reclassification or change of the Common
                  Stock (other than a subdivision or combination of its
                  outstanding Common Stock or a change in par value) or any
                  consolidation, merger or statutory share exchange to which the
                  Corporation is a party and for which approval of any
                  stockholders of the Corporation is required, or the sale or
                  transfer of all or substantially all of the assets of the
                  Corporation; or

              (iv)there shall be a voluntary or involuntary dissolution,
                  liquidation or winding up of the Corporation;

     then, the Corporation shall cause to be filed with the transfer agent for
     the Series and shall cause to be mailed to the holders of shares of the
     Series at their addresses as shown on the books of the transfer agent for
     the Series, as promptly as possible, but at least 30 days prior to the
     applicable date hereinafter specified, a notice stating (A) the date on
     which a record is to be taken for the purpose of such dividend,
     distribution or granting of rights or warrants, or, if a record is not to
     be taken, the date as of which the holders of Common Stock of record to be
     entitled to such dividend, distribution or rights or warrants are to be
     determined or (B) the date on which such reclassification, change,
     consolidation, merger, statutory share exchange, sale, transfer,
     dissolution, liquidation or winding up is expected to become effective or
     occur, and the date as of which it is expected that holders of Common Stock
     of record shall be entitled to exchange their shares of Common Stock for


                                       13


     securities or other property deliverable upon such reclassification,
     change, consolidation, merger, statutory share exchange, sale, transfer,
     dissolution, liquidation or winding up. Failure to give such notice or any
     defect therein shall not affect the legality or validity of the proceedings
     described in this paragraph 7(i).

         (j) Whenever the Conversion Price is adjusted as herein provided, the
     Corporation shall promptly file with the transfer agent for the Series a
     certificate of an officer of the Corporation setting forth the Conversion
     Price after the adjustment and setting forth a brief statement of the facts
     requiring such adjustment and a computation thereof. The Corporation shall
     promptly cause a notice of the adjusted Conversion Price to be mailed to
     each registered holder of shares of the Series.

         (k) In any case in which paragraph 7(g) provides that an adjustment
     shall become effective immediately after a record date for an event and the
     date fixed for such adjustment pursuant to paragraph 7(g) occurs after such
     record date but before the occurrence of such event, the Corporation may
     defer until the actual occurrence of such event (i) issuing to the holder
     of any shares of the Series converted after such record date and before the
     occurrence of such event the additional shares of Common Stock issuable
     upon such conversion by reason of the adjustment required by such event
     over and above the Common Stock issuable upon such conversion before giving
     effect to such adjustment and (ii) paying to such holder any amount in cash
     in lieu of any fraction pursuant to paragraph 7(d).

         (l) In case the Corporation shall take any action affecting the Common
     Stock, other than actions described in this paragraph 7, which in the
     opinion of the Board of Directors would materially adversely affect the
     conversion right of the holders of the shares of the Series, the Conversion
     Price may be adjusted, to the extent permitted by law, in such manner, if
     any, and at such time, as the Board of Directors may determine to be
     equitable in the circumstances; PROVIDED, HOWEVER, that in no event shall
     the Board of Directors be required to take any such action.

         (m) The Corporation will endeavor to list the shares of Common Stock
     required to be delivered upon conversion of shares of the Series, prior to
     delivery, upon each national securities exchange, the Nasdaq Stock Market
     or any similar system of automated dissemination of securities prices, if
     any, upon which the Common Stock is listed at the time of delivery.

         8. STATUS OF SHARES. All shares of the Series that are at any time
     redeemed or converted pursuant to paragraphs 5, 6 ot 7 above, and all
     shares of the Series that are otherwise reacquired by the Corporation and
     subsequently canceled by the Board of Directors, shall have the status of
     authorized but unissued shares of preferred stock, without designation as
     to series, subject to reissuance by the Board of Directors as shares of any
     one or more other series.

         9. VOTING RIGHTS. Except as otherwise required by law, holders of
     shares of the Series shall have no vote with respect to any matter
     submitted to the stockholders of the Corporation for vote or consent. In


                                       14


     connection with any right to vote or give consent provided by law, each
     holder of shares of the Series will have one vote for each share held.

          10. CERTAIN DEFINITIONS. As used in this Certificate, the following
     terms shall have the following respective meanings:

         "AFFILIATE" of any specified person means any other person directly or
     indirectly controlling or controlled by or under common control with such
     specified person. For purposes of this definition, "control" when used with
     respect to any person means the power to direct the management and policies
     of such person, directly or indirectly, whether through the ownership of
     voting securities or otherwise; and the term "controlling" and "controlled"
     having meanings correlative to the foregoing.

          An "ASSOCIATE" of a person means (A) any corporation or organization,
     other than the Corporation or any subsidiary of the Corporation, of which
     the person is an officer or partner or is, directly or indirectly, the
     beneficial owner of 10% or more of any class of equity securities; (B) any
     trust or estate in which the person has a substantial beneficial interest
     or as to which the person serves as trustee or in a similar fiduciary
     capacity; and (C) any relative or spouse of the person, or any relative of
     the spouse, who has the same home as the person or who is a director or
     officer of the person or any of its parents or subsidiaries.

         "CAPITAL STOCK" of any person or entity means any and all shares,
     interests, rights to purchase, warrants, options, participations or other
     equivalents of or interests in the common stock or preferred stock of such
     person or entity, including, without limitation, partnership and membership
     interests.

         "CONVERSION PRICE" means, as of any date, the lesser of (x) 87% of the
     volume weighted average sales price of the Corporation's Common Stock for
     the five day period preceding the date with respect to which the Conversion
     Price is being determined or (y) $1.265; provided, however, that the
     Conversion Price will not be less than $0.575 per share. For purposes of
     this definition, the volume weighted average sales price of the
     Corporation's Common Stock shall be as reported by Bloomberg L.P. or, if
     such information is not available from Bloomberg L.P., from such other
     source as the Corporation and the holder may mutually agree.

         "CURRENT MARKET PRICE" means, when used with respect to any security as
     of any date, the last bid price regular way of such security as reported on
     the Nasdaq National Market for such date, or, if such security is not
     listed or admitted to trading on the Nasdaq National Market, as reported on
     the Nasdaq SmallCap Market for such date, or, in case such security is
     listed on a national securities exchange other than Nasdaq, the last sales
     price of such security on such date as reported for consolidated
     transactions with respect to securities listed on the principal national
     securities exchange on which such security is listed or admitted to trading
     or, if such security is not listed or admitted to trading on the Nasdaq
     Stock Market or any national securities exchange, the average of the high
     bid and low asked prices of such security on such date in the


                                       15


     over-the-counter market, as reported by the National Association of
     Securities Dealers, Inc. Automated Quotations System or such other system
     then in use or, if such security is not quoted by any such organization,
     the average of the closing bid and asked prices of such security as of such
     date furnished by a New York Stock Exchange member firm selected by the
     Corporation, or if such security is not quoted by any such organization and
     no such New York Stock Exchange member firm is able to provide such prices,
     such price as is determined by the Independent Directors in good faith.

         "INDEPENDENT DIRECTORS" means directors that (i) are not 5% or greater
     stockholders of the Corporation or the designee of any such stockholder;
     (ii) are not officers or employees of the Corporation, any of its
     subsidiaries or of a stockholder referred to above in clause (i); (iii) are
     not Related Persons; and (iv) do not have relationships that, in the
     opinion of the Board of Directors, would interfere with their exercise of
     independent judgment in carrying out the responsibilities of the directors.

         "RELATED PERSON" means an individual related to an officer, director or
     employee of the Corporation or any of its Affiliates which relation is by
     blood, marriage or adoption and not more remote than first cousin.



                            [signature page follows]


                                       16




          IN WITNESS WHEREOF, the Corporation has caused this Certificate to be
duly executed on its behalf by its undersigned Chief Executive Officer and
attested to by its Secretary this 14th day of May 2001.


                                           /s/ John E. DuBois
                                           ------------------------------------
                                           John E. DuBois
                                           Chief Executive Officer

ATTEST:


/s/ Jay R. Schifferli
- --------------------------------
Jay R. Schifferli
Secretary