EXHIBIT B
     to Securities Purchase Agreement

     VOID AFTER 5:00 P.M., CENTRAL STANDARD
     TIME ON APRIL 15, 2004


     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
     UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY
     STATE OF THE UNITED STATES. THE SECURITIES REPRESENTED HEREBY MAY NOT BE
     OFFERED OR SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF AN EFFECTIVE
     REGISTRATION STATEMENT FOR THE SECURITIES UNDER APPLICABLE SECURITIES LAWS,
     OR UNLESS OFFERED, SOLD OR TRANSFERRED PURSUANT TO AN AVAILABLE EXEMPTION
     FROM THE REGISTRATION REQUIREMENTS OF THOSE LAWS.

                                               Right to Purchase ____ Shares of
                                Class A Common Stock, par value $0.01 per share

     Date: April 15, 1999

                           WESTELL TECHNOLOGIES, INC.
                             STOCK PURCHASE WARRANT


          THIS CERTIFIES THAT, for value received, or its registered assigns, is
     entitled to purchase from Westell Technologies, Inc., a Delaware
     corporation (the "Company"), at any time or from time to time during the
     period specified in Section 2 hereof, fully paid and nonassessable shares
     of the Company's Class A Common Stock, par value $0.01 per share (the
     "Class A Common Stock" and, when taken together with all other classes and
     series of the common stock of the Company, the "Common Stock"), at an
     exercise price of $8.9208 per share (the "Exercise Price"). This Warrant is
     being issued pursuant to that certain Securities Purchase Agreement dated
     April 14, 1999 among the Company and the signatories thereto (the
     "Securities Purchase Agreement"). The number of shares of Class A Common
     Stock purchasable hereunder (the "Warrant Shares") and the Exercise Price
     are subject to adjustment as provided in Section 4 hereof. The term
     "Warrants" means this Warrant and the other warrants of the Company issued
     pursuant to the terms of the Securities Purchase Agreement.

          The term "Closing Sale Price" means, for any security as of any date,
     the closing sale price of such security on the principal securities
     exchange or trading market where such security is listed or traded as
     reported by Bloomberg Financial Markets or a comparable reporting service
     of national reputation selected by the Company and reasonably acceptable to
     the holder hereof (the "Holder") if Bloomberg Financial Markets is not then
     reporting closing sale prices of such security (collectively, "Bloomberg"),
     or if the foregoing does not apply, the last reported sale price of such
     security in the over-the-counter market on the electronic bulletin board of
     such security as reported by Bloomberg, or, if no sale price is reported
     for such security by Bloomberg, the average of the bid prices of any market
     makers for such security as reported in the "pink sheets" by the National
     Quotation Bureau, Inc. If the Closing Sale Price cannot be calculated for
     such security on such date on any of the foregoing bases, the Closing Sale
     Price of such security on such date shall be the fair market value as
     reasonably determined by an investment banking firm selected by the Company
     and reasonably acceptable to the Holder with the costs of such appraisal to
     be borne by the Company.

          This Warrant is subject to the following terms, provisions, and
     conditions:





          1. Mechanics of Exercise. Subject to the provisions hereof, including,
     without limitation, the limitations contained in Section 8(f) hereof, this
     Warrant may be exercised as follows:

          (a) Manner of Exercise. This Warrant may be exercised by the Holder,
     in whole or in part, by the surrender of this Warrant (or evidence of loss,
     theft, destruction or mutilation thereof in accordance with Section 8(c)
     hereof), together with a completed exercise agreement in the Form of
     Exercise Agreement attached hereto as Exhibit 1 (the "Exercise Agreement"),
     to the Company at the Company's principal executive offices (or such other
     office or agency of the Company as it may designate by notice to the
     Holder), and upon (i) payment to the Company in cash, by certified or
     official bank check or by wire transfer for the account of the Company, of
     the Exercise Price for the Warrant Shares specified in the Exercise
     Agreement or (ii) if the Holder elects to effect a Cashless Exercise (as
     defined in Section 12(c) below), delivery to the Company of a written
     notice of an election to effect a Cashless Exercise for the Warrant Shares
     specified in the Exercise Agreement. The Warrant Shares so purchased shall
     be deemed to be issued to the Holder or Holder's designees, as the record
     owner of such shares, as of the date on which this Warrant shall have been
     surrendered, the completed Exercise Agreement shall have been delivered,
     and payment (or notice of an election to effect a Cashless Exercise) shall
     have been made for such shares as set forth above.

          (b) Issuance of Certificates. Subject to Section 1(c), certificates
     for the Warrant Shares so purchased, representing the aggregate number of
     shares specified in the Exercise Agreement, shall be delivered to the
     Holder within a reasonable time, not exceeding three (3) business days,
     after this Warrant shall have been so exercised (the "Delivery Period").
     The certificates so delivered shall be in such denominations as may be
     requested by the Holder and shall be registered in the name of Holder or
     such other name as shall be designated by such Holder. If this Warrant
     shall have been exercised only in part, then, unless this Warrant has
     expired, the Company shall, at its expense, at the time of delivery of such
     certificates, deliver to the Holder a new Warrant representing the number
     of shares with respect to which this Warrant shall not then have been
     exercised.

          (c) Exercise Disputes. In the case of any dispute with respect to an
     exercise, the Company shall promptly issue such number of shares of Class A
     Common Stock as are not disputed in accordance with this Section. If such
     dispute involves the calculation of the Exercise Price, the Company shall
     submit the disputed calculations to a nationally recognized independent
     accounting firm (selected by the Company) via facsimile within three (3)
     business days of receipt of the Exercise Agreement. The accounting firm
     shall audit the calculations and notify the Company and the converting
     Holder of the results no later than two (2) business days from the date it
     receives the disputed calculations. The accounting firm's calculation shall
     be deemed conclusive, absent manifest error. The Company shall then issue
     the appropriate number of shares of Class A Common Stock in accordance with
     this Section.

          (d) Fractional Shares. No fractional shares of Class A Common Stock
     are to be issued upon the exercise of this Warrant, but the Company shall
     pay a cash adjustment in respect of any fractional share which would
     otherwise be issuable in an amount equal to the same fraction of the
     Exercise Price of a share of Class A Common Stock (as determined for
     exercise of this Warrant into whole shares of Class A Common Stock);
     provided that in the event that sufficient funds are not legally available
     for the payment of such cash adjustment any fractional shares of Class A
     Common Stock shall be rounded up to the next whole number.

          (e) Buy-In. If (i) the Company fails for any reason to deliver during
     the Delivery Period shares of Class A Common Stock to Holder upon an
     exercise of this Warrant and (ii) after the applicable Delivery Period





     with respect to such an exercise, Holder purchases (in an open market
     transaction or otherwise) shares of Class A Common Stock to make delivery
     upon a sale by Holder of the shares of Class A Common Stock (the "Sold
     Shares") which Holder was entitled to receive upon such exercise (a
     "Buy-in"), the Company shall pay Holder (in addition to any other remedies
     available to Holder) the amount by which (x) Holder's total purchase price
     (including brokerage commission, if any) for the shares of Class A Common
     Stock so purchased exceeds (y) the lesser of (A) the Exercise Price or (B)
     the net proceeds received by Holder from the sale of the Sold Shares.
     Holder shall provide the Company written notification indicating any
     amounts payable to Holder pursuant to this subsection.

          2. Period of Exercise. This Warrant is exercisable at any time or from
     time to time on or after the date hereof and before 5:00 P.M., Central
     Standard Time on the fifth (5th) anniversary of the date hereof (the
     "Exercise Period").

          3. Certain Agreements of the Company. The Company hereby covenants and
     agrees as follows:

               (a) Shares to be Fully Paid. All Warrant Shares will, upon
     issuance in accordance with the terms of this Warrant, be validly issued,
     fully paid, and non-assessable and free from all taxes, liens, claims and
     encumbrances.

               (b) Reservation of Shares. During the Exercise Period, the
     Company shall at all times have authorized, and reserved for the purpose of
     issuance upon exercise of this Warrant, a sufficient number of shares of
     Class A Common Stock to provide for the exercise of this Warrant.

               (c) Listing. The Company shall promptly secure the listing of the
     shares of Class A Common Stock issuable upon exercise of this Warrant upon
     The Nasdaq National Market, or the New York Stock Exchange, as required by
     Section 4.10 of the Securities Purchase Agreement and upon each national
     securities exchange or automated quotation system, if any, upon which
     shares of Class A Common Stock are then listed or become listed and shall
     maintain, so long as any other shares of Class A Common Stock shall be so
     listed, such listing of all shares of Class A Common Stock from time to
     time issuable upon the exercise of this Warrant; and the Company shall so
     list on each such national securities exchange or automated quotation
     system, as the case may be, and shall maintain such listing of any other
     shares of capital stock of the Company issuable upon the exercise of this
     Warrant so long as any shares of the same class shall be listed on such
     national securities exchange or automated quotation system.

               (d) Certain Actions Prohibited. The Company will not, by
     amendment of its charter or through any reorganization, transfer of assets,
     consolidation, merger, dissolution, issue or sale of securities, or any
     other voluntary action, avoid or seek to avoid the observance or
     performance of any of the terms to be observed or performed by it
     hereunder, but will at all times in good faith assist in the carrying out
     of all the provisions of this Warrant and in the taking of all such actions
     as may reasonably be requested by the Holder of this Warrant in order to
     protect the exercise privilege of the Holder of this Warrant, consistent
     with the tenor and purpose of this Warrant. Without limiting the generality
     of the foregoing, the Company (i) will not increase the par value of any
     shares of Class A Common Stock receivable upon the exercise of this Warrant
     above the Exercise Price then in effect, and (ii) will take all such
     actions as may be necessary or appropriate in order that the Company may
     validly and legally issue fully paid and nonassessable shares of Class A
     Common Stock upon the exercise of this Warrant.

          4. Antidilution Provisions. During the Exercise Period, the Exercise
     Price and the number of Warrant Shares shall be subject to adjustment from
     time to time as provided in this Section 4. In the event





     that any adjustment of the Exercise Price as required herein results in a
     fraction of a cent, such Exercise Price shall be rounded up or down to the
     nearest cent.

               (a) Adjustment of Exercise Price and Number of Shares upon
     Issuance of Common Stock. Except as otherwise provided in Section 4(c) and
     4(e) hereof, if and whenever after the initial issuance of this Warrant,
     the Company issues or sells, or in accordance with Section 4(b) hereof is
     deemed to have issued or sold, any shares of Common Stock for no
     consideration or for a consideration per share less than the Market Price
     (as herein defined) on the date of issuance (a "Dilutive Issuance"), then
     effective immediately upon the Dilutive Issuance, the Exercise Price will
     be adjusted in accordance with the following formula:

               E' = (E) (O + P/M) / (CSDO)


               where:

               E' = the adjusted Exercise Price E = the then current Exercise
               Price; M = the then current Market Price;
               O         = the number of shares of Common Stock outstanding
                         immediately prior to the Dilutive Issuance;
               P         = the aggregate consideration, calculated as set forth
                         in Section 4(b) hereof, received by the Company upon
                         such Dilutive Issuance; and
               CSDO      = the total number of shares of Common Stock Deemed
                         Outstanding (as herein defined) immediately after the
                         Dilutive Issuance.

               (b) Effect on Exercise Price of Certain Events. For purposes of
     determining the adjusted Exercise Price under Section 4(a) hereof, the
     following will be applicable:

                    (i) Issuance of Rights or Options. If the Company in any
     manner issues or grants any warrants, rights or options, whether or not
     immediately exercisable, to subscribe for or to purchase Common Stock or
     other securities exercisable, convertible into or exchangeable for Common
     Stock ("Convertible Securities"), but not to include the grant or exercise
     of any stock or options which may hereafter be granted or exercised under
     any employee or Director benefit plan of the Company now existing or to be
     implemented in the future, so long as the issuance of such stock or options
     is approved by a majority of the non-employee members of the Board of
     Directors of the Company or a majority of the members of a committee of
     non-employee directors established for such purpose (such warrants, rights
     and options to purchase Common Stock or Convertible Securities are
     hereinafter referred to as "Options"), and the price per share for which
     Common Stock is issuable upon the exercise of such Options is less than the
     Market Price on the date of issuance ("Below Market Options"), then the
     maximum total number of shares of Common Stock issuable upon the exercise
     of all such Below Market Options (assuming full exercise, conversion or
     exchange of Convertible Securities, if applicable) will, as of the date of
     the issuance or grant of such Below Market Options, be deemed to be
     outstanding and to have been issued and sold by the Company for such price
     per share. For purposes of the preceding sentence, the price per share for
     which Common Stock is issuable upon the exercise of such Below Market
     Options is determined by dividing (i) the total amount, if any, received or
     receivable by the Company as consideration for the issuance or granting of
     such Below Market Options, plus the minimum aggregate amount of additional
     consideration, if any, payable to the Company upon the exercise of all such
     Below Market Options, plus, in the case of Convertible Securities issuable
     upon the exercise of such Below Market Options, the minimum aggregate
     amount of additional consideration payable upon the exercise, conversion or
     exchange thereof at the time such Convertible Securities first become
     exercisable, convertible or





     exchangeable, by (ii) the maximum total number of shares of Common Stock
     issuable upon the exercise of all such Below Market Options (assuming full
     conversion of Convertible Securities, if applicable). No further adjustment
     to the Exercise Price will be made upon the actual issuance of such Common
     Stock upon the exercise of such Below Market Options or upon the exercise,
     conversion or exchange of Convertible Securities issuable upon exercise of
     such Below Market Options.

                    (ii) Issuance of Convertible Securities.

                         (A) If the Company in any manner issues or sells any
     Convertible Securities, whether or not immediately convertible (other than
     where the same are issuable upon the exercise of Options) and the price per
     share for which Common Stock is issuable upon such exercise, conversion or
     exchange (as determined pursuant to Section 4(b)(ii)(B) if applicable) is
     less than the Market Price on the date of issuance, then the maximum total
     number of shares of Common Stock issuable upon the exercise, conversion or
     exchange of all such Convertible Securities will, as of the date of the
     issuance of such Convertible Securities, be deemed to be outstanding and to
     have been issued and sold by the Company for such price per share. For the
     purposes of the preceding sentence, the price per share for which Common
     Stock is issuable upon such exercise, conversion or exchange is determined
     by dividing (i) the total amount, if any, received or receivable by the
     Company as consideration for the issuance or sale of all such Convertible
     Securities, plus the minimum aggregate amount of additional consideration,
     if any, payable to the Company upon the exercise, conversion or exchange
     thereof at the time such Convertible Securities first become exercisable,
     convertible or exchangeable, by (ii) the maximum total number of shares of
     Common Stock issuable upon the exercise, conversion or exchange of all such
     Convertible Securities. No further adjustment to the Exercise Price will be
     made upon the actual issuances of such Common Stock upon exercise,
     conversion or exchange of such Convertible Securities.

                         (B) If the Company in any manner issues or sells any
     Convertible Securities with a fluctuating conversion or exercise price or
     exchange ratio (a "Variable Rate Convertible Security"), then the price per
     share for which Common Stock is issuable upon such exercise, conversion or
     exchange for purposes of the calculation contemplated by Section
     4(b)(ii)(A) shall be deemed to be the lowest price per share which would be
     applicable assuming that (1) all holding period and other conditions to any
     discounts contained in such Convertible Security have been satisfied, and
     (2) the Market Price on the date of issuance of such Convertible Security
     was 80% of the Market Price on such date (the "Assumed Variable Market
     Price").

                    (iii) Change in Option Price or Conversion Rate. Except for
     the grant or exercise of any stock or options which may hereafter be
     granted or exercised under any employee or Director benefit plan of the
     Company now existing or to be implemented in the future, so long as the
     issuance of such stock or options is approved by a majority of the
     non-employee members of the Board of Directors of the Company or a majority
     of the members of a committee of non-employee directors established for
     such purpose, if there is a change at any time in (i) the amount of
     additional consideration payable to the Company upon the exercise of any
     Options; (ii) the amount of additional consideration, if any, payable to
     the Company upon the exercise, conversion or exchange or any Convertible
     Securities; or (iii) the rate at which any Convertible Securities are
     convertible into or exchangeable for Common Stock (other than under or by
     reason of provisions designed to protect against dilution), the Exercise
     Price in effect at the time of such change will be readjusted to the
     Exercise Price which would have been in effect at such time had such
     Options or Convertible Securities still outstanding provided for such
     changed additional consideration or changed conversion rate, as the case
     may be, at the time initially granted, issued or sold.





                    (iv) Treatment of Expired Options and Unexercised
     Convertible Securities. If, in any case, the total number of shares of
     Common Stock issuable upon exercise of any Options or upon exercise,
     conversion or exchange of any Convertible Securities is not, in fact,
     issued and the rights to exercise such option or to exercise, convert or
     exchange such Convertible Securities shall have expired or terminated, the
     Exercise Price then in effect will be readjusted to the Exercise Price
     which would have been in effect at the time of such expiration or
     termination had such Options or Convertible Securities, to the extent
     outstanding immediately prior to such expiration or termination (other than
     in respect of the actual number of shares of Common Stock issued upon
     exercise or conversion thereof), never been issued.

                    (v) Calculation of Consideration Received. If any Common
     Stock, Options or Convertible Securities are issued, granted or sold for
     cash, the consideration received therefor for purposes of this Warrant will
     be the amount received by the Company therefor, before deduction of
     reasonable commissions, underwriting discounts or allowances or other
     reasonable expenses paid or incurred by the Company in connection with such
     issuance, grant or sale, plus the minimum aggregate amount of additional
     consideration, if any, payable to the Company upon the exercise, conversion
     or exchange of all such Options or Convertible Securities at the time such
     Options or Convertible Securities first become exercisable, convertible or
     exchangeable. In case any Common Stock, Options or Convertible Securities
     are issued or sold for a consideration part or all of which shall be other
     than cash, the amount of the consideration other than cash received by the
     Company will be the fair market value of such consideration except where
     such consideration consists of freely-tradeable securities, in which case
     the amount of consideration received by the Company will be the Market
     Price thereof as of the date of receipt. In case any Common Stock, Options
     or Convertible Securities are issued in connection with any merger or
     consolidation in which the Company is the surviving corporation, the amount
     of consideration therefor will be deemed to be the fair market value of
     such portion of the net assets and business of the non-surviving
     corporation as is attributable to such Common Stock, Options or Convertible
     Securities, as the case may be. The fair market value of any consideration
     other than cash or securities will be determined in the good faith
     reasonable business judgment of the Board of Directors.

                    (vi) Exceptions to Adjustment of Exercise Price. No
     adjustment to the Exercise Price will be made (i) upon the exercise of any
     warrants, options or convertible securities issued and outstanding on the
     date hereof in accordance with the terms of such securities as of such
     date; (ii) upon the grant or exercise of any stock or options which may
     hereafter be granted or exercised under any employee or Director benefit
     plan of the Company now existing or to be implemented in the future, so
     long as the issuance of such stock or options is approved by a majority of
     the non-employee members of the Board of Directors of the Company or a
     majority of the members of a committee of non-employee directors
     established for such purpose; (iii) upon the issuance of the Common Shares
     (as defined in the Securities Purchase Agreement) or Warrants in accordance
     with terms of the Securities Purchase Agreement; or (iv) upon the exercise
     of the Warrants.

               (c) Subdivision or Combination of Common Stock. If the Company,
     at any time after the initial issuance of this Warrant, subdivides (by any
     stock split, stock dividend, recapitalization, reorganization,
     reclassification or otherwise) its shares of Common Stock into a greater
     number of shares, then, after the date of record for effecting such
     subdivision, the Exercise Price in effect immediately prior to such
     subdivision will be proportionately reduced. If the Company, at any time
     after the initial issuance of this Warrant, combines (by reverse stock
     split, recapitalization, reorganization, reclassification or otherwise) its
     shares of Common Stock into a smaller number of shares, then, after the
     date of record for effecting such combination, the





     Exercise Price in effect immediately prior to such combination will be
     proportionately increased.

               (d) Adjustment in Number of Shares. Upon each adjustment of the
     Exercise Price pursuant to the provisions of this Section 4, the number of
     shares of Common Stock issuable upon exercise of this Warrant shall be
     adjusted by multiplying a number equal to the Exercise Price in effect
     immediately prior to such adjustment by the number of shares of Common
     Stock issuable upon exercise of this Warrant immediately prior to such
     adjustment and dividing the product so obtained by the adjusted Exercise
     Price.

               (e) Major Transactions. If the Company shall consolidate or merge
     with any other corporation or entity (other than a merger in which the
     Company is the surviving or continuing entity and its capital stock is
     unchanged and unissued in such transaction (except for issuances which do
     not exceed twenty percent (20%) of the Class A Common Stock and do not
     result in a Change of Control (as defined in the Debenture))) or there
     shall occur any share exchange pursuant to which all of the outstanding
     shares of Common Stock are converted into other securities or property or
     any reclassification or change of the outstanding shares of Common Stock or
     the Company shall sell all or substantially all of its assets (each of the
     foregoing being a "Major Transaction"), then the holder of this Warrant
     may, at its option, either (a) in the event that the Common Stock remains
     outstanding or holders of Common Stock receive any common stock or
     substantially similar equity interest, in each of the foregoing cases which
     is publicly traded, retain this Warrant and this Warrant shall continue to
     apply to such Common Stock or shall apply, as nearly as practicable, to
     such other common stock or equity interest, as the case may be, or (b)
     regardless of whether (a) applies, receive consideration, in exchange for
     this Warrant (without payment of any exercise price hereunder), equal to
     the greater of, as determined in the sole discretion of such holder: (i)
     the number of shares of stock or securities or property of the Company, or
     of the entity resulting from such Major Transaction (the "Major Transaction
     Consideration"), to which a holder of the number of shares of Common Stock
     delivered upon the exercise of this Warrant (pursuant to the cashless
     exercise feature hereof) would have been entitled upon such Major
     Transaction had such holder so exercised this Warrant (without regard to
     any limitations on exercise herein or elsewhere contained) on the trading
     date immediately preceding the public announcement of the transaction
     resulting in such Major Transaction and had such Common Stock been issued
     and outstanding and had such Holder been the holder of record of such
     Common Stock at the time of the consummation of such Major Transaction, and
     (ii) cash paid by the Company in immediately available funds, in an amount
     equal to one hundred and twenty five percent (125%) of the Black-Scholes
     Amount (as defined herein) times the number of shares of Common Stock for
     which this Warrant was exercisable (without regard to any limitations on
     exercise herein contained and assuming payment of the exercise payment in
     cash hereunder); and the Company shall make lawful provision for the
     foregoing as a part of such Major Transaction and shall cause the issuer of
     any security in such transaction which constitutes Registrable Securities
     under that certain Registration Rights Agreement dated April 14, 1999 among
     the Company and the signatories thereto (the "Registration Rights
     Agreement") to assume all of the Company's obligations under the
     Registration Rights Agreement (provided any cash election pursuant to
     clause (ii) above must be made in writing to the Company within ten (10)
     business days following consummation of such applicable transaction (or, in
     the event that a Company Transaction (as defined below) occurs, within ten
     (10) business days following the Measurement Period (as defined below)). In
     the event that the Company shall consolidate or merge with any other
     corporation in a transaction in which common stock of the surviving
     corporation or the parent thereof (the "Exchange Securities") is issued to
     the holders of Common Stock in such transaction in exchange for all such
     Common Stock, and (a) the Exchange Securities are publicly traded, (b) the
     average daily trading volume of the Exchange Securities during the one
     hundred eighty





     (180) day period ending on the date on which such transaction is publicly
     disclosed is greater than two million dollars ($2,000,000) per day, (c) the
     historical one hundred (100) day volatility of the Exchange Securities
     during the period ending on the date on which such transaction is publicly
     disclosed is greater than sixty percent (60%) and (d) the market
     capitalization of the issuer of the Exchange Securities is not less than
     one hundred fifty million dollars ($150,000,000) based on the last sale
     price of the Exchange Securities on the date immediately before the date on
     which such transaction is publicly disclose (in each case, with respect to
     the foregoing clauses (a) through (d), as reported by Bloomberg), then the
     provisions of clause (b) of the preceding sentence shall not apply. In the
     event that the Company shall, in a Major Transaction, consolidate or merge
     with any other corporation in a transaction in which the Company is the
     survivor (a "Company Transaction"), the provisions of clause (ii) of the
     second preceding sentence shall not apply to the extent that each of the
     following conditions remain true for the thirty (30) business days
     commencing as of the date of the consummation of such transaction (the
     "Measurement Period"): (a) the Class A Common Stock remains publicly traded
     during the period, (b) the average daily trading volume of the Class A
     Common Stock is greater than two million dollars ($2,000,000), (c) the
     historical thirty (30) day volatility of the Company's Class A Common Stock
     is greater than sixty percent (60%), and (d) the market capitalization of
     the Company (including Class B Common Stock) is not less than one hundred
     fifty million dollars ($150,000,000) on the last day of the period (in each
     case, with respect to the foregoing clauses (a) through (d), as reported by
     Bloomberg). No sooner than ten (10) business days nor later than five (5)
     business days prior to the consummation of the Major Transaction or Common
     Stock Major Transaction, as the case may be (each, a "Transaction"), but
     not prior to the public announcement of such Transaction, the Company shall
     deliver written notice ("Notice of Transaction") to each holder of a
     Warrant, which Notice of Transaction shall be deemed to have been delivered
     one (1) business day after the Company's sending such notice by telecopy
     (provided that the Company sends a confirming copy of such notice on the
     same day by overnight courier) of such Notice of Transaction. Such Notice
     of Transaction shall indicate the amount and type of the transaction
     consideration which such holder of a Warrant would receive under this
     Section ("Transaction Consideration"). If the Transaction Consideration is
     cash and does not consist entirely of United States currency, such holder
     may elect to receive United States currency in an amount equal to the value
     of the Transaction Consideration in lieu of the Transaction Consideration
     by delivering notice of such election to the Company within five (5)
     business days of such holder's receipt of the Notice of Transaction.

     The "Black-Scholes Amount" shall be an amount equal to 0.75 times the
     amount determined by calculating the "Black-Scholes" value of an option to
     purchase one share of Common Stock on the applicable page on the Bloomberg
     online page, using the following variable values: (i) the current market
     price of the Common Stock equal to the closing trade price on the last
     trading day before the date of the Notice of Transaction; (ii) volatility
     of the Common Stock equal to the volatility of the common Stock during the
     100 trading day period preceding the date of the Notice of Transaction;
     (iii) a risk free rate equal to the interest rate on the United States
     treasury bill or treasury note with a maturity corresponding to the
     remaining term of this Warrant on the date of the Notice of Transaction;
     and (iv) an exercise price equal to the Exercise Price on the date of the
     Notice of the Transaction. In the event such calculation function is no
     longer available utilizing the Bloomberg online page, the Holder shall
     calculate such amount in its sole discretion using the closest available
     alternative mechanism and variable values to those available utilizing the
     Bloomberg online page for such calculation function.

               (f) Distribution of Assets. In case the Company shall declare or
     make any distribution of its assets (or rights to acquire its assets) to
     holders of Common Stock as a partial liquidating dividend, by way of return
     of capital or otherwise (including any dividend or distribution to





     the Company's shareholders of cash or shares (or rights to acquire shares)
     of capital stock of a subsidiary) (a "Distribution"), at any time after the
     initial issuance of this Warrant, then the Holder shall be entitled upon
     exercise of this Warrant for the purchase of any or all of the shares of
     Common Stock subject hereto, to receive the amount of such assets (or
     rights) which would have been payable to the Holder had such Holder been
     the holder of such shares of Common Stock on the record date for the
     determination of shareholders entitled to such Distribution.

               (g) Notices of Adjustment. Upon the occurrence of any event which
     requires any adjustment of the Exercise Price, then, and in each such case,
     the Company shall give notice thereof to the Holder, which notice shall
     state the Exercise Price resulting from such adjustment and the increase or
     decrease in the number of Warrant Shares purchasable at such price upon
     exercise, setting forth in reasonable detail the method of calculation and
     the facts upon which such calculation is based. Such calculation shall be
     certified by the chief financial officer of the Company.

               (h) Minimum Adjustment of Exercise Price. No adjustment of the
     Exercise Price shall be made in an amount of less than 1% of the Exercise
     Price in effect at the time such adjustment is otherwise required to be
     made, but any such lesser adjustment shall be carried forward and shall be
     made at the time and together with the next subsequent adjustment which,
     together with any adjustments so carried forward, shall amount to not less
     than 1% of such Exercise Price.

               (i) No Fractional Shares. No fractional shares of Class A Common
     Stock are to be issued upon the exercise of this Warrant, but the Company
     shall pay a cash adjustment in respect of any fractional share which would
     otherwise be issuable in an amount equal to the same fraction of the Market
     Price of a share of Class A Common Stock; provided that in the event that
     sufficient funds are not legally available for the payment of such cash
     adjustment any fractional shares of Class A Common Stock shall be rounded
     up to the next whole number.

               (j)  Other Notices.  In case at any time:

                    (i) the Company shall declare any dividend upon the Common
     Stock payable in shares of stock of any class or make any other
     distribution to the holders of the Common Stock;

                    (ii) the Company shall offer for subscription pro rata to
     the holders of the Common Stock any additional shares of stock of any class
     or other rights;

                    (iii) there shall be any capital reorganization of the
     Company, or reclassification of the Common Stock, or consolidation or
     merger of the Company with or into, or sale of all or substantially all of
     its assets to, another corporation or entity; or

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

     then, in each such case, the Company shall give to the Holder (a) notice of
     the date on which the books of the Company shall close or a record shall be
     taken for determining the holders of Common Stock entitled to receive any
     such dividend, distribution, or subscription rights or for determining the
     holders of Common Stock entitled to vote in respect of any such
     reorganization, reclassification, consolidation, merger, sale, dissolution,
     liquidation or winding-up and (b) in the case of any such reorganization,
     reclassification, consolidation, merger, sale, dissolution, liquidation or
     winding-up, notice of the date (or, if not then known, a reasonable
     approximation thereof by the Company) when the same shall take place. Such
     notice shall also specify the date on which the holders of Common Stock
     shall be entitled to receive such dividend,





     distribution, or subscription rights or to exchange their Common Stock for
     stock or other securities or property deliverable upon such reorganization,
     reclassification, consolidation, merger, sale, dissolution, liquidation, or
     winding-up, as the case may be. Such notice shall be given at least 30 days
     prior to the record date or the date on which the Company's books are
     closed in respect thereto, but in no event earlier than public announcement
     of such proposed transaction or event. Failure to give any such notice or
     any defect therein shall not affect the validity of the proceedings
     referred to in clauses (i), (ii), (iii) and (iv) above.

               (k)  Certain Definitions.

                    (i) "Common Stock Deemed Outstanding" shall mean the number
     of shares of Common Stock actually outstanding (not including shares of
     Common Stock held in the treasury of the Company), plus (x) in case of any
     adjustment required by Section 4(a) resulting from the issuance of any
     Options, the maximum total number of shares of Common Stock issuable upon
     the exercise of the Options for which the adjustment is required (including
     any Common Stock issuable upon the conversion of Convertible Securities
     issuable upon the exercise of such Options), and (y) in the case of any
     adjustment required by Section 4(a) resulting from the issuance of any
     Convertible Securities, the maximum total number of shares of Common Stock
     issuable upon the exercise, conversion or exchange of the Convertible
     Securities for which the adjustment is required, as of the date of issuance
     of such Convertible Securities, if any.

                    (ii) "Market Price," as of any date, (i) means the average
     of the Closing Sale Prices for the shares of Common Stock as reported to
     The Nasdaq National Market for the trading day immediately preceding such
     date, or (ii) if The Nasdaq National Market is not the principal trading
     market for the Common Stock, the average of the last reported bid prices on
     the principal trading market for the Common Stock during the same period,
     or, if there is no bid price for such period, the last reported sales price
     for such period, or (iii) if market value cannot be calculated as of such
     date on any of the foregoing bases, the Market Price shall be the average
     fair market value as reasonably determined by an investment banking firm
     selected by the Company and reasonably acceptable to the Holders of a
     majority in interest of the Warrants, with the costs of the appraisal to be
     borne by the Company. The manner of determining the Market Price of the
     Common Stock set forth in the foregoing definition shall apply with respect
     to any other security in respect of which a determination as to market
     value must be made hereunder.

                    (iii) "Common Stock," for purposes of this Section 4,
     includes the Common Stock and any additional class of stock of the Company
     having no preference as to dividends or distributions on liquidation,
     provided that the shares purchasable pursuant to this Warrant shall include
     only Common Stock in respect of which this Warrant is exercisable, or
     shares resulting from any subdivision or combination of such Common Stock,
     or in the case of any reorganization, reclassification, consolidation,
     merger, or sale of the character referred to in Section 4(e) hereof, the
     stock or other securities or property provided for in such Section.

               (l) Other Adjustments. If any Key Officers (as defined in the
     Securities Purchase Agreement) or any replacement of any Key Officer,
     during the six-month period beginning on the date that the registration
     statement required pursuant to Section 2.1 of the Registration Rights
     Agreement, and while an officer or director, directly or indirectly, offer,
     sell, transfer, assign, pledge, or otherwise dispose of any shares of
     Common Stock, or any securities directly or indirectly convertible into or
     exercisable or exchangeable for, or warrants, options or rights to purchase
     or acquire shares of Common Stock (all such securities, "Options") or enter
     into any agreement, contract, arrangement or understanding with respect to
     any such offer, sale, transfer, assignment,





     pledge or other disposition of any Common Stock or Options (an "Executive
     Transfer"), then the Exercise Price shall be reduced by twenty percent
     (20%). Provided, however that a Key Officer may sell up to ten percent
     (10%) of his or her total holdings during such six-month period without
     triggering the adjustments of this Section 8.10.

          5.   [Intentionally omitted]

          6. Issue Tax. The issuance of certificates for Warrant Shares upon the
     exercise of this Warrant shall be made without charge to the Holder or such
     shares for any issuance tax or other costs in respect thereof, provided
     that the Company shall not be required to pay any tax which may be payable
     in respect of any transfer involved in the issuance and delivery of any
     certificate in a name other than the Holder.

          7. No Rights or Liabilities as a Shareholder. This Warrant shall not
     entitle the Holder to any voting rights or other rights as a shareholder of
     the Company. No provision of this Warrant, in the absence of affirmative
     action by the Holder to purchase Warrant Shares, and no mere enumeration
     herein of the rights or privileges of the Holder, shall give rise to any
     liability of the Holder for the Exercise Price or as a shareholder of the
     Company, whether such liability is asserted by the Company or by creditors
     of the Company.

          8. Transfer, Exchange, Redemption and Replacement of Warrant.

               a. Restriction on Transfer. This Warrant and the rights granted
     to the Holder are transferable, in whole or in part, upon surrender of this
     Warrant, together with a properly executed assignment in the Form of
     Assignment attached hereto as Exhibit 2, at the office or agency of the
     Company referred to in Section 8(e) below, provided, however, that any
     transfer or assignment shall be subject to the provisions of Section 5.1
     and 5.2 of the Securities Purchase Agreement. Until due presentment for
     registration of transfer on the books of the Company, the Company may treat
     the registered holder hereof as the owner and holder hereof for all
     purposes, and the Company shall not be affected by any notice to the
     contrary. Notwithstanding anything to the contrary contained herein, the
     registration rights described in Section 9 hereof are assignable only in
     accordance with the provisions of the Registration Rights Agreement.

               b. Warrant Exchangeable for Different Denominations. This Warrant
     is exchangeable, upon the surrender hereof by the Holder at the office or
     agency of the Company referred to in Section 8(e) below, for new Warrants,
     in the form hereof, of different denominations representing in the
     aggregate the right to purchase the number of shares of Common Stock which
     may be purchased hereunder, each of such new Warrants to represent the
     right to purchase such number of shares as shall be designated by the
     Holder of at the time of such surrender.

               c. Replacement of Warrant. Upon receipt of evidence reasonably
     satisfactory to the Company of the loss, theft, destruction, or mutilation
     of this Warrant or, in the case of any such loss, theft, or destruction,
     upon delivery, of an indemnity agreement reasonably satisfactory in form
     and amount to the Company, or, in the case of any such mutilation, upon
     surrender and cancellation of this Warrant, the Company, at its expense,
     will execute and deliver, in lieu thereof, a new Warrants, in the form
     hereof, in such denominations as Holder may request.

               d. Cancellation; Payment of Expenses. Upon the surrender of this
     Warrant in connection with any transfer, exchange, or replacement as
     provided in this Section 8, this Warrant shall be promptly canceled by the
     Company. The Company shall pay all issuance taxes (other than securities
     transfer taxes) and charges payable in connection with the preparation,
     execution, and delivery of Warrants pursuant to this Section 8.





               e. Warrant Register. The Company shall maintain, at its principal
     executive offices (or such other office or agency of the Company as it may
     designate by notice to the Holder), a register for this Warrant, in which
     the Company shall record the name and address of the person in whose name
     this Warrant has been issued, as well as the name and address of each
     transferee and each prior owner of this Warrant.

               f. Additional Restriction on Exercise or Transfer.
     Notwithstanding anything to the contrary contained herein, the Warrants
     shall not be exercisable by the Holder to the extent (but only to the
     extent) that, if exercisable by Holder, Holder would beneficially own in
     excess of 4.9% (the "Applicable Percentage") of the shares of Class A
     Common Stock. To the extent the above limitation applies, the determination
     of whether the Warrants shall be exercisable (vis-a-vis other securities
     owned by Holder which contain similar limitations on conversion) and of
     which Warrants shall be exercisable (as among Warrants) shall be made on
     the basis of the earliest submission of the Warrants (vis-a-vis other
     securities owned by the Holder which contain similar limitations on
     conversion and vis a vis other Warrants), in each case subject to such
     aggregate percentage limitation. No prior inability to exercise Warrants
     pursuant to this paragraph shall have any effect on the applicability of
     the provisions of this paragraph with respect to any subsequent
     determination of exercisability. For the purposes of this paragraph,
     beneficial ownership and all determinations and calculations, including
     without limitation, with respect to calculations of percentage ownership,
     shall be determined in accordance with Section 13(d) of the Securities
     Exchange Act of 1934, as amended, and Regulation 13D and G thereunder. The
     provisions of this paragraph may be implemented in a manner otherwise than
     in strict conformity with the terms of this Section 8(f) with the approval
     of the Board of Directors of the Company and the Holder: (i) with respect
     to any matter to cure any ambiguity herein, to correct this paragraph (or
     any portion hereof) which may be defective or inconsistent with the
     intended Applicable Percentage beneficial ownership limitation herein
     contained or to make changes or supplements necessary or desirable to
     properly give effect to such Applicable Percentage limitation; and (ii)
     with respect to any other matter, with the further consent of the holders
     of a majority of the then outstanding shares of Class A Common Stock. For
     clarification, it is expressly a term of this security that the limitations
     contained in this Section shall apply to each successor Holder.

          9. Registration Rights. The initial holder of this Warrant (and
     certain assignees thereof) is entitled to the benefit of such registration
     rights in respect of the Warrant Shares as are set forth in the
     Registration Rights Agreement.

          10. Notices. Any notice herein required or permitted to be given shall
     be in writing and may be personally served or delivered by courier or by
     confirmed telecopy, and shall be deemed delivered at the time and date of
     receipt (which shall include telephone line facsimile transmission). The
     addresses for such communications shall be:

               If to the Company:

                    Westell Technologies, Inc.
                    750 N. Commons Drive
                    Aurora, IL 60504
                    Telecopy: (630) 375-4940
                    Attention: Stephen J. Hawrysz

                    with a copy to:

                    Neal J. White, P.C.
                    McDermott, Will & Emery
                    227 West Monroe Street
                    Chicago, IL 60606





                    Telecopy:  (312) 984-3669      
                    Attention:  (312) 984-7579    

     and if to the Holder, at such address as Holder shall have provided in
     writing to the Company, or at such other address as each such party
     furnishes by notice given in accordance with this Section 10.

          11. Governing Law; Jurisdiction. This Warrant shall be governed by and
     construed in accordance with the laws of the State of New York applicable
     to contracts made and to be performed in the State of New York. The Company
     irrevocably consents to the jurisdiction of the United States federal
     courts located in the State of New York and the state courts located in the
     County of New York in the State of New York in any suit or proceeding based
     on or arising under this Warrant and irrevocably agrees that all claims in
     respect of such suit or proceeding may be determined in such courts. The
     Company irrevocably waives the defense of an inconvenient forum to the
     maintenance of such suit or proceeding. The Company agrees that a final
     nonappealable judgment in any such suit or proceeding shall be conclusive
     and may be enforced in other jurisdictions by suit on such judgment or in
     any other lawful manner.

          12.  Miscellaneous.

               a.   Amendments.  This Warrant and any provision hereof may only
     be  amended by  an instrument  in writing  signed by  the Company  and the
     Holder.

               b. Descriptive Headings. The descriptive headings of the several
     Sections of this Warrant are inserted for purposes of reference only, and
     shall not affect the meaning or construction of any of the provisions
     hereof.

               c. Cashless Exercise. Notwithstanding anything to the contrary
     contained in this Warrant, this Warrant may be exercised by presentation
     and surrender of this Warrant to the Company at its principal executive
     offices with a written notice of the Holder's intention to effect a
     cashless exercise, including a calculation of the number of shares of Class
     A Common Stock to be issued upon such exercise in accordance with the terms
     hereof (a "Cashless Exercise"). In the event of a Cashless Exercise, in
     lieu of paying the Exercise Price in cash, the Holder shall surrender this
     Warrant for the number of shares of Class A Common Stock determined by
     multiplying the number of Warrant Shares to which it would otherwise be
     entitled by a fraction, the numerator of which shall be the difference
     between the then current Market Price per share of the Class A Common Stock
     and the Exercise Price, and the denominator of which shall be such then
     current Market Price per share of Class A Common Stock.

               d. Assignability. This Warrant shall be binding upon the Company
     and its successors and assigns and shall inure to the benefit of Holder and
     its successors and assigns. The Holder shall notify the Company upon the
     assignment of this Warrant.

          IN WITNESS WHEREOF, the Company has caused this Warrant to be signed
     by its duly authorized officer.


                                        Westell Technologies, Inc.

                                       By:
                                             ---------------------------------

                                      Name:
                                     Title:


                           FORM OF EXERCISE AGREEMENT





           (To be Executed by the Holder in order to Exercise the Warrant)

          The undersigned hereby irrevocably exercises the right to purchase
     ____________ of the shares of common stock of Westell Technologies, Inc., a
     Delaware corporation (the "Company"), evidenced by the attached Warrant,
     and [herewith makes payment of the Exercise Price with respect to such
     shares in full/ elects to effect a Cashless Exercise pursuant to the terms
     of the Warrant], all in accordance with the conditions and provisions of
     said Warrant.

          (i) The undersigned agrees not to offer, sell, transfer or otherwise
     dispose of any Common Stock obtained on exercise of the Warrant, except
     under circumstances that will not result in a violation of the Securities
     Act of 1933, as amended, or any state securities laws.

          (ii) The undersigned requests that stock certificates for such shares
     be issued, and a Warrant representing any unexercised portion hereof be
     issued, pursuant to the Warrant in the name of the Holder (or such other
     person or persons indicated below) and delivered to the undersigned (or
     designee(s) at the address (or addresses) set forth below:

     Date:                                                            
                                        Signature of Holder


                                        Name of Holder (Print)

                                        Address:



                               FORM OF ASSIGNMENT

          FOR VALUE RECEIVED, the undersigned hereby sells, assigns, and
     transfers all rights of the undersigned under the within Warrant, with
     respect to the number of shares of Common Stock covered thereby set forth
     hereinbelow, to:

     Name of Assignee                   Address                  No. of Shares


     ,     and     hereby     irrevocably     constitutes      and     appoints
     ______________________________ as agent  and attorney-in-fact to  transfer
     said Warrant on the books of the within-named corporation, with full power
     of substitution in the premises.


     Date:____________, _____,

     In the presence of

                                        -------------------------------------
                                      Name:

                                        -------------------------------------
                                        Signature:

                                        Title of Signing Officer or Agent (if
                                        any):

                                        Address:

                                        Note:     The  above  signature  should
                                                  correspond  exactly  with the
                                                  name  on  the  face   of  the
                                                  within Warrant.