SECURITY AGREEMENT

          THIS SECURITY AGREEMENT ("Agreement") dated as of April 14, 1999 is
     entered into by Westell Technologies, Inc., a Delaware corporation
     ("Company"), Westell, Inc., an Illinois corporation and Westell
     International, Inc., a Delaware corporation (collectively, the "Debtors"
     and each individually a "Debtor"), and Castle Creek Technology Partners LLC
     ("Secured Party").

                                    Recitals:

          A. Company has entered into a certain Securities Purchase Agreement of
     even date herewith between Company and Secured Party, pursuant to which
     Secured Party has agreed, subject to the terms and conditions thereof, to
     purchase a certain 6% Subordinated Convertible Debenture of even date (as
     amended, restated or otherwise modified and in effect from time to time the
     "Debenture").

          B. It is a condition precedent to the purchase of the Debenture that
     Debtors shall have granted the security interest contemplated by this
     Agreement.

          NOW, THEREFORE, in consideration of the premises and to induce Secured
     Party to purchase the Debenture and to make the Loans to Company
     thereunder, and for other good and valuable consideration, the receipt and
     sufficiency of which are hereby acknowledged, the parties agree as follows:

          1. Definitions. Capitalized terms used herein without definition are
     used herein as defined in the Debenture. In addition, the following terms
     shall have the following meanings:

               "Accounts" shall mean any "account," as such term is defined in
     the Uniform Commercial Code.

               "Account Debtor" shall mean the Person who is or may be obligated
     to any Debtor under, with respect to or on account of an Account, an
     Instrument, a General Intangible or other Collateral.

               "Chattel Paper" shall mean any "chattel paper," as such term is
     defined in the Uniform Commercial Code.

               "Collateral" is defined in Section 2 hereof.

               "Contracts" shall mean all contracts, undertakings or other
     agreements (other than rights evidenced by Chattel Paper, Documents or
     Instruments) in or under which any Debtor may now or hereafter have any
     right, title or interest, including, without limitation, with respect to an
     Account, any agreement relating to the terms of payment or the terms of
     performance thereof.

               "Copyrights" shall mean any of each Debtor's copyrights, rights
     and interests in copyrights, works protectable by copyrights, copyright
     registrations and copyright applications, including, without limitation,
     the copyright registrations and applications listed on Schedule 3 attached
     hereto, and all renewals of any of the foregoing, all income, royalties,
     damages and payments now or hereafter due or payable under or with respect
     to any of the foregoing, including, without limitation, damages and
     payments for past, present and future infringements of any of the foregoing
     and the right to sue for past, present and future infringements of any of
     the foregoing.

               "Documents" shall mean any "documents," as such term is defined
     in the Uniform Commercial Code.

               "Equipment"  shall mean any "equipment," as such term is defined





     in the Uniform Commercial Code and shall include fixtures, motor vehicles,
     tractors, trailers and other like property, whether or not the title
     thereto is governed by a certificate of title or ownership.

               "Event of Default" means an Event of Failure under the Debenture
     after expiration of any cure periods.

               "General Intangibles" shall mean any "general intangibles," as
     such term is defined in the Uniform Commercial Code and shall include,
     without limitation, all right, title and interest in or under any Contract,
     drawings, materials and records, claims, literary rights, goodwill, rights
     of performance, Copyrights, Trademarks, patents, warranties, rights under
     insurance policies and rights of indemnification.

               "Goods" shall mean any "goods," as such term is defined in the
     Uniform Commercial Code.

               "Instruments" shall mean any "instrument," as such term is
     defined in the Uniform Commercial Code and shall include, without
     limitation, promissory notes, drafts, bills of exchange, trade acceptances,
     letters of credit and Chattel Paper.

               "Inventory" shall mean any "inventory," as such term is defined
     in the Uniform Commercial Code.

               "Investment Property" shall mean any "investment property," as
     such term is defined in the Uniform Commercial Code, other than shares or
     other equity interests of non-U.S. subsidiaries.

               "LaSalle" means LaSalle National Bank or its successors or
     assigns or replacements of holders of Permitted Senior Indebtedness under
     clause (i) of the definition of such Permitted Senior Indebtedness.

               "Obligations" shall mean all obligations of the Company under the
     Debenture, the PIK Debentures and the Cap Debenture including, without
     limitations, the Company's obligation to pay principal and interest and to
     redeem the Debentures.

               "Patents" shall mean any of each Debtor's patents and patent
     applications, including, without limitation, the inventions and
     improvements described and claimed therein, all patentable inventions and
     those patents and patent applications listed on Schedule 4 attached hereto,
     and the reissues, divisions, continuation, renewals, extensions and
     continuations-in-part of any of the foregoing, and all income, royalties,
     damages and payments now or hereafter due or payable under or with respect
     to any of the foregoing, including, without limitation, damages and
     payments for past, present and future infringements of any of the foregoing
     and the right to sue for past, present and future infringements of any of
     the foregoing.

               "Permitted Senior Indebtedness" shall have the meaning given to
     it in the Securities Purchase Agreement.

               "Proceeds" shall mean "proceeds," as such term is defined in the
     Uniform Commercial Code and shall include, without limitation, (a) any and
     all proceeds of any insurance, indemnity, warranty or guaranty payable with
     respect to any of the Collateral, (b) any and all payments, in any form
     whatsoever, made or due and payable from time to time in connection with
     any confiscation, condemnation, seizure or forfeiture of all or any part of
     the Collateral by any governmental authority, and (c) any and all other
     amounts from time to time paid or payable under, in respect of or in
     connection with any of the Collateral.

               "Subordination Agreement" means that certain Subordination
     Agreement between Secured Party and LaSalle National Bank of even date
     herewith and any successor subordination agreement executed by Secured





     Party and LaSalle.

               "Trademarks" shall mean any of each Debtor's trademarks, trade
     names, corporate names, company names, business names, fictitious business
     names, trade styles, service marks, logos, other business identifiers,
     prints and labels on which any of the foregoing have appeared or appear,
     all registrations and recordings thereof, and all applications in
     connection therewith, including, without limitation, the trademarks and
     applications listed on Schedule 5 attached hereto and renewals thereof, and
     all income, royalties, damages and payments now or hereafter due or payable
     under or with respect to any of the foregoing, including, without
     limitation, damages and payments for past, present and future infringements
     of any of the foregoing and the right to sue for past, present and future
     infringements of any of the foregoing.

               "Uniform Commercial Code" shall mean the Uniform Commercial Code
     as in effect from time to time in the State of Illinois; provided, however,
     if, by reason of mandatory provisions of law, the attachment, perfection or
     priority of Secured Party's security interest in any Collateral is governed
     by the Uniform Commercial Code as in effect in a jurisdiction other than
     the State of Illinois, the term "Uniform Commercial Code" shall mean the
     Uniform Commercial Code as in effect in such other jurisdiction for
     purposes of the provisions hereof relating to such attachment, perfection
     or priority and for purposes of definitions related to such provisions.

          2. Grant of Security Interest. As collateral security for the prompt
     payment, performance and observance in full of the Obligations, each Debtor
     hereby pledges and grants to Secured Party, a Lien on and security interest
     in and to all of such Debtor's right, title and interest in the following
     property and interests in property, whether now owned or hereafter acquired
     by such Debtor and wherever located (collectively, the "Collateral"):

               (a)  all Accounts;

               (b)  all Inventory;

               (c)  all General Intangibles;

               (d) all Instruments, together with all payments thereon or
     thereunder;

               (e)  all Equipment;

               (f)  all Documents;

               (g)  all Contracts;
               (h)  all Goods;

               (i)  all  Investment Property  including without  limitation all
     shares  of stock  in Westell,  Inc. and  Westell International,  Inc., but
     except shares of stock of Conference Plus, Inc.;

               (j) all bank and depositary accounts maintained by each Debtor,
     all funds on deposit therein, all investments arising out of such funds,
     all claims thereunder or in connection therewith, and all cash, securities,
     rights and other property at any time and from time to time received,
     receivable or otherwise distributed in respect of such accounts;

               (k) all other tangible and intangible property of Debtor,
     including without limitation, all Proceeds, products, accessions, rents,
     profits, income, benefits, substitutions, additions and replacement of and
     to any of the property described in this Section 2 including, without
     limitation, any proceeds of insurance thereon and all rights, claims and
     benefits against any Person relating thereto) and all books,





     correspondence files, records, invoices and other papers, including,
     without limitation, all tapes, cards, computer runs, computer programs,
     computer files and other papers, documents and records in the possession or
     under the control of each Debtor or any computer bureau or service company
     from time to time acting for each Debtor.

          3. Representations, Warranties and Covenants of Debtor. Each Debtor
     represents and warrants to, and covenants with, Secured Party as follows:

               (a) Debtor is and will be the owner of the Collateral and no Lien
     other than Liens securing Permitted Senior Indebtedness and liens that are
     Permitted Liens under the Loan Agreement pertaining to Permitted Senior
     Indebtedness exists or will exist upon such Collateral at any time.

               (b) This Agreement is effective to create in favor of Secured
     Party a valid security interest in and Lien upon all of Debtor's right,
     title and interest in and to the Collateral and, upon the filing of
     appropriate Uniform Commercial Code financing statements in the
     jurisdictions listed on Schedule 1 attached hereto, such security interest
     will be duly perfected in all of the Collateral (other than Instruments not
     constituting Chattel Paper, Investment Property, deposit accounts and cash
     and Patents and Trademarks), and upon delivery of the Instruments and
     Investment Property to LaSalle, duly endorsed by Debtor or accompanied by
     appropriate instruments of transfer duly executed by Debtor, the security
     interest in the Instruments will be duly perfected in accordance with the
     provisions of the Subordination Agreement.

               (c) All of the Equipment, Inventory and Goods are located at the
     places specified on Schedule 1 attached hereto. Except as disclosed on
     Schedule 1, none of the Collateral is in the possession of any bailee,
     warehouseman, processor or consignee. The chief place of business, chief
     executive office and the office where Debtor keeps its books and records
     are located at the place specified on Schedule 1. Debtor does not do
     business and has not done business under any trade name or fictitious
     business name except as disclosed on Schedule 2 attached hereto.


               (d) All information heretofore, herein or hereafter furnished to
     Secured Party by or on behalf of Debtor with respect to the Collateral is
     and will be accurate and complete in all material respects.

          4. Agreements of Debtor. Subject to the provisions of the
     Subordination Agreement and to Debtors' agreement under Security Agreement
     pertaining to the Permitted Senior Indebtedness Debtor hereby agrees with
     Secured Party as follows:

               (a) Delivery of Instruments. Instruments shall be held by
     LaSalle, and Secured Party's interest therein shall be governed by the
     provisions of the Subordination Agreement (or other intercreditor letter as
     to Collateral held by LaSalle).

               (b) Other Documents and Actions. Debtors shall give, execute,
     deliver, file or record any financing statement, notice, instrument,
     agreement or other document that may be necessary or desirable in the
     reasonable judgment of Secured Party to create, preserve, perfect or
     validate the security interest granted pursuant hereto or to enable Secured
     Party to exercise and enforce the rights of Secured Party hereunder with
     respect to such security interest.

               (c) Books and Records. Debtors shall maintain at their own cost
     and expense complete and accurate books and records of the Collateral,
     including, without limitation, a record of all payments received and all
     credits granted with respect to the Collateral and all other dealings with
     the Collateral. Upon the occurrence and during the continuation of any
     Event of Default, Debtors shall deliver any such books





     and records, or true and correct copies thereof, to Secured Party at any
     time on demand. Debtors shall permit any representative of Secured Party to
     inspect such books and records at any time during reasonable business hours
     and shall provide photocopies thereof at Debtors' expense to Secured Party
     upon the request of Secured Party.

               (d) Notice to Account Debtors; Verification. (i) Upon the
     occurrence and during the continuance of any Event of Default, upon request
     of Secured Party, Debtors shall promptly notify (and each Debtor hereby
     authorizes Secured Party so to notify) each Account Debtor in respect of
     any Accounts or Instruments that such Collateral has been assigned to
     Secured Party and that any payments due or to become due in respect of such
     Collateral are to be made directly to the party having a senior lien on a
     security interest in such collateral, and (ii) Secured Party shall have the
     right at any time or times to make direct verification with the Account
     Debtors of any and all of the Accounts.

               (e) Intellectual Property. If any Debtor shall (i) obtain rights
     to any patentable inventions, Copyrights, Patents or Trademarks not listed
     on Schedule 3, 4 or 5, or (ii) become entitled to the benefit of any
     Copyrights, Patents or Trademarks or any improvements on any Patent, the
     provisions of this Agreement shall automatically apply thereto and Debtor
     shall give Secured Party prompt written notice thereof. Each Debtor hereby
     authorizes Secured Party to modify this Agreement by amending Schedules 3,
     4 and 5, as applicable, to include any such Copyrights, Patents and
     Trademarks.

               (f) Further Identification of Collateral. Each Debtor shall, when
     and as often as reasonably requested by Secured Party, furnish to Secured
     Party, statements and schedules further identifying and describing the
     Collateral and such other reports in connection with the Collateral as
     Secured Party may reasonably request, all in reasonable detail.

               (g) Investment Property. The Investment Property will be held by
     LaSalle, and Secured Party's interest therein shall be governed by the
     provisions of the Subordination Agreement (or other intercreditor letter as
     to Collateral held by LaSalle).

               (h) Compliance with Loan Documents. Each Debtor shall comply with
     the provisions of the Loan Documents applicable to the Collateral,
     including, without limitation, maintenance of insurance, restrictions on
     dispositions and providing Secured Party the right to inspections with
     respect to the Collateral.

               (i) Other Liens. Each Debtor shall not create, permit or suffer
     to exist, and shall defend the Collateral against and take such other
     action as is necessary to remove, any Lien on the Collateral except
     Permitted Liens, and shall defend the right, title and interest of Secured
     Party in and to the Collateral and in and to all Proceeds thereof against
     the claims and demands of all Persons whatsoever.

               (j) Preservation of Rights. Whether or not any Event of Default
     has occurred or is continuing, Secured Party may, but shall not be required
     to, take any actions Secured Party reasonably deems necessary or
     appropriate to preserve any Collateral or any rights against third parties
     to any of the Collateral, including obtaining insurance on the Collateral
     at any time when Debtors has failed to do so, and each Debtor shall
     promptly pay, or reimburse Secured Party for, all expenses incurred in
     connection therewith.

               (k) Changes in Name; Location. Each Debtor shall notify Secured
     Party promptly in writing prior to any change in Debtor's name, identity or
     corporate structure or the proposed use by such Debtor of any trade name or
     fictitious business name other than any such name set forth on Schedule 2
     attached hereto. Each Debtor shall keep the Collateral at the locations
     specified in any Schedule 1 and shall give Secured Party 30





     days' prior written notice of any change in any Debtor's chief place of
     business or of any new location for any of the Collateral.

               (l)  Intentionally Omitted

               (m) Collection of Accounts. Until notice from Secured Party to
     the contrary, given at any time after the occurrence and during the
     continuance of any Event of Default, each Debtor shall, at its own expense,
     endeavor to collect all amounts due with respect to any of the Accounts and
     shall take such action with respect to such collection as such Debtor may
     deem advisable.

               (n) Proceeds of Collateral. Subject to the provisions of the
     Subordination Agreement, upon demand therefor by Secured Party at any time
     following the occurrence and during the continuance of any Event of
     Default, each Debtor shall, forthwith upon receipt, transmit and deliver to
     Secured Party, in the form received, all cash, checks, drafts and other
     instruments or writings for the payment of money which may be received by
     Debtor at any time in payment or otherwise as proceeds of any Collateral.
     Any such items which may be so received by such Debtors shall not be
     commingled by Debtors with any of its other funds or property but, until
     delivery to Secured Party, shall be held separate and apart from such other
     funds and property and in trust for Secured Party.

          5. Remedies. Subject to the rights of any holders of Permitted Senior
     Indebtedness, and pursuant to the provisions of the Subordination
     Agreement, during the period during which an Event of Default shall have
     occurred and be continuing:

               (a) Secured Party shall have, in addition to other rights and
     remedies provided for herein or otherwise available to it, all of the
     rights and remedies of a Secured Party upon default under the Uniform
     Commercial Code (whether or not the Uniform Commercial Code applies to the
     affected Collateral) and Lender may, without notice, demand or legal
     process of any kind except as may be required by law, at any time or times
     (i) enter any Debtor's premises and take physical possession of the
     Collateral and maintain such possession on such Debtor's premises, at no
     cost to Lender, or remove the Collateral or any part thereof to such other
     place or places as Secured Party may desire, (ii) require any Debtor to,
     and such Debtor hereby agrees to, assemble the Collateral as directed by
     Secured Party and make it available to Secured Party at a place to be
     designated by Secured Party which is reasonably convenient to Secured Party
     and such Debtor and (iii) without notice except as specified below, sell,
     lease, assign, grant an option or options to purchase or otherwise dispose
     of the Collateral or any part thereof at public or private sale, at any
     exchange, broker's board or at any of the offices of Secured Party or
     elsewhere, for cash, on credit or for future delivery, and upon such other
     terms as Secured Party may deem commercially reasonable. Each Debtor agrees
     that, to the extent notice of sale shall be required by law, at least 10
     days' notice to such Debtor of the time and place of any public sale or the
     time after which any private sale is to be made shall constitute reasonable
     notification. Secured Party shall not be obligated to make any sale of
     Collateral regardless of notice of sale having been given. Secured Party
     may adjourn any public or private sale from time to time by announcement at
     the time and place fixed therefor and such sale may, without further
     notice, be made at the time and place to which it was so adjourned;

               (b) Secured Party may make any reasonable compromise or
     settlement deemed desirable with respect to any of the Collateral and may
     extend the time of payment, arrange for payment in installments or
     otherwise modify the terms of, any of the Collateral; and

               (c) Secured Party may, in the name of Secured Party or in the
     name of Debtor or otherwise, demand, sue for, collect or receive any money
     or property at any time payable or receivable on account of or in exchange





     for any of the Collateral, but shall be under no obligation to do so.

          6. Deficiency; Application of Proceeds. If the proceeds of sale,
     collection or other realization of or upon the Collateral are insufficient
     to cover the costs and expenses of such realization and the payment in full
     of the Obligations, Company shall remain liable for any deficiency. Subject
     to the provisions of the Subordination Agreement, the proceeds of any
     collection, sale or other realization of all or any part of the Collateral
     shall be applied: first, to payment of all expenses payable or reimbursable
     by Company under the Debenture; second, to payment of all accrued unpaid
     interest on the Debenture; third, to payment of principal of the Debenture;
     fourth, to payment of any other amounts owing constituting Obligations; and
     last, any remainder shall be for the account of and paid to Company.

          7. Power of Attorney. Subject to the provisions of the Subordination
     Agreement, each Debtor hereby irrevocably constitutes and appoints Secured
     Party, with full power of substitution, as its true and lawful
     attorney-in-fact with full irrevocable power and authority in the place and
     stead of Debtor and in the name of Debtor or in its own name, from time to
     time in the discretion of Secured Party, for the purpose of carrying out
     the terms of this Agreement, to take any and all appropriate action and to
     execute and deliver any and all documents and instruments which may be
     necessary or desirable to accomplish the purposes of this Agreement and,
     without limiting the generality of the foregoing, hereby gives Secured
     Party the power and right, on behalf of Debtor, without notice to or assent
     by Debtor, to do the following upon the occurrence and during the
     continuance of an Event of Default:

               (a) to ask, demand, collect, receive and acquittance and receipts
     for any and all moneys due and to become due under any Collateral and, in
     the name of Debtor or its own name or otherwise, to take possession of and
     endorse and collect any checks, drafts, notices acceptances or other
     Instruments for the payment of moneys due under any Collateral and to file
     any claim or to take any other action or proceeding in any court of law or
     equity or otherwise deemed appropriate by Secured Party for the purpose of
     collecting any and all such moneys due under any Collateral whenever
     payable and to file any claim or to take any other action or proceeding or
     otherwise deemed appropriate by Secured Party for the purpose of collecting
     any and all such moneys due under any Collateral;

               (b) to pay or discharge charges or Liens levied or placed on or
     threatened against the Collateral, other than Permitted Liens, to effect
     any insurance required by the terms of the Credit Agreement and to pay all
     or any part of the premiums therefor;

               (c) to direct any party liable for any payment under any of the
     Collateral to make payment of any and all moneys due and to become due
     thereunder directly to Secured Party or as Secured Party may direct, and to
     receive payment of and receipt for any and all moneys, claims and other
     amounts due and to become due in respect of or arising out of any
     Collateral;

               (d) to sign and indorse any invoices, drafts against debtors,
     assignments, verifications and notices in connection with Accounts and
     other Documents constituting or relating to the Collateral;

               (e) to commence and prosecute any suits, actions or proceedings
     to collect the Collateral or any part thereof and to enforce any other
     right in respect of any Collateral;

               (f) to defend any suit, action or proceeding brought against
     Debtor with respect to any Collateral;

               (g) to settle, compromise or adjust any such suit, action or





     proceeding as it relates to the Collateral and, in connection therewith, to
     give such discharges or releases as Secured Party may deem appropriate;

               (h) to communicate in its own name with any party to any Contract
     with regard to the assignment of the right, title and interest of Debtor in
     and under the Contracts hereunder and other matters relating thereto;

               (i) to execute, in connection with any sale of Collateral
     provided for in Section 5 hereof, any endorsements, assignments or other
     instruments of conveyance or transfer with respect to the Collateral; and

               (j) generally to sell, transfer, pledge, make any agreement with
     respect to or otherwise deal with any of the Collateral as fully and
     completely as though Secured Party were the absolute owner thereof for all
     purposes and to do, at Secured Party's option and at Debtor's expense, at
     any time or from time to time, all acts and things which Secured Party
     reasonably deems necessary to protect, preserve or realize upon the
     Collateral and Secured Party's Lien therein, in order to effect the intent
     of this Agreement, all as fully and effectively as Debtor might do.

     Each Debtor hereby ratifies, to the extent permitted by law, all actions
     that such attorneys lawfully take or cause to be taken by virtue hereof.
     The power of attorney granted hereunder is a power coupled with an interest
     and shall be irrevocable until the Obligations are indefeasibly paid in
     full and the Debenture, the PIK Debenture and the Cap Debentures are
     terminated.

          8. Termination. This Agreement and the Liens and security interests
     granted hereunder shall not terminate until the termination of the
     Debenture, the PIK Debenture and the Cap Debentures and the full and
     complete performance and indefeasible satisfaction of all Obligations
     (regardless of whether the Debenture, the PIK Debenture and the Cap
     Debentures shall have earlier terminated); provided, however, that Debtors
     may sell Collateral free and clear of the Lien and securities interests
     granted herein if (i) such sale is permitted by the holders of the
     Permitted Senior Indebtedness and (ii) such sale is a bona fide sale made
     to a third party that is not an affiliate of any Debtor or a holder of
     Permitted Senior Indebtedness. Upon the termination of this Agreement,
     Secured Party shall forthwith cause to be assigned, transferred and
     delivered free and clear of the Lien created herein, against receipt but
     without any recourse, warranty or representation whatsoever, any remaining
     Collateral to or on the order of Debtor.

          9. Further Assurances. At any time and from time to time, upon the
     request of Secured Party, and at the sole expense of Debtors, each Debtor
     shall promptly and duly execute and deliver any and all such further
     instruments, documents and agreements and take such further actions as
     Secured Party may reasonably require in order for Secured Party to obtain
     the full benefits of this Agreement, including, without limitation, using
     Debtor's best efforts to secure all consents and approvals necessary or
     appropriate for the assignment to Secured Party of any Collateral held by
     Debtors or in which each Debtors has any rights not heretofore assigned,
     the filing of any financing or continuation statements under the Uniform
     Commercial Code with respect to the Liens and security interests granted
     hereby, transferring Collateral to LaSalle's possession if a security
     interest in such Collateral can be perfected by possession, placing the
     interest of Secured Party as lienholder on the certificate of title of any
     motor vehicle and obtaining waivers of liens from landlords and mortgagees.
     Each Debtor further hereby authorizes Secured Party to file any such
     financing or continuation statement without the signature of Debtor to the
     extent permitted by law.

          10. Limitation on Duty of Secured Party. The powers conferred on
     Secured Party under this Agreement are solely to protect the Secured
     Party's interest in the Collateral and shall not impose any duty upon it





     to exercise any such powers. Except for the safe custody of any Collateral
     in its possession and the accounting for moneys actually received by it
     hereunder, Secured Party shall have no duty as to any of the Collateral.
     Secured Party shall be accountable only for amounts that it actually
     receives as a result of the exercise of such powers and neither Secured
     Party nor any of their respective officers, directors, employees or agents
     shall be responsible to Debtor for any act or failure to act, except for
     gross negligence or willful misconduct. Without limiting the foregoing,
     Secured Party shall be deemed to have exercised reasonable care in the
     custody and preservation of the Collateral in its possession if such
     Collateral is accorded treatment substantially equivalent to that which
     Secured Party, in its individual capacity, accords its own property
     consisting of the type of Collateral involved, it being understood and
     agreed that Secured Party shall have no responsibility for taking any
     necessary steps, other than steps taken in accordance with the standard of
     care set forth above, to preserve rights against any Person with respect to
     any Collateral.

          11. Debtor to Remain Liable. Without limiting the generality of
     Section 10, Secured Party shall have no obligation or liability under any
     Contract or license by reason of or arising out of this Agreement or the
     granting to Secured Party of a security interest therein or assignment
     thereof or the receipt by Secured Party of any payment relating to any
     Contract or licence hereto, nor shall Secured Party be required or
     obligated in any manner to perform or fulfill any of the obligations of
     Debtor under or pursuant to any Contract or license, or to make any payment
     or to make any inquiry as to the nature or the sufficiency of any payment
     received by it or the sufficiency of any performance by any party under any
     Contract or license, or to present or file any claim, or to take any action
     to collect or enforce any performance or the payment of any amount which
     may have been assigned to it or to which it may be entitled at any time or
     times.

          12.  Miscellaneous.

               (a) No Waiver. No failure on the part of Secured Party to
     exercise, and no course of dealing with respect to, and no delay in
     exercising, any right, power or remedy hereunder shall operate as a waiver
     thereof, nor shall any single or partial exercise by Secured Party of any
     right, power or remedy hereunder preclude any other or further exercise
     thereof or the exercise of any other right, power or remedy. The rights and
     remedies hereunder provided are cumulative and may be exercised singly or
     concurrently, and are not exclusive of any rights and remedies provided by
     law.

               (b) Governing Law. This Agreement shall be governed by and
     construed in accordance with the laws of the State of Illinois, without
     giving effect to the choice of law principles thereof.

               (c) Notices. All notices, demands and requests that any party is
     required or elects to give to any other party shall be given in accordance
     with the provisions of the Debenture.

               (d) Amendments. The terms of this Agreement may be waived,
     altered or amended only by an instrument in writing duly executed by Debtor
     and Secured Party.

               (e) Successors and Assigns. This Agreement shall be binding upon
     and inure to the benefit of the respective successors and assigns of each
     of the parties hereto, provided, that Debtor shall not assign or transfer
     its rights hereunder without the prior written consent of Secured Party.

               (f) Counterparts; Headings. This Agreement may be executed in any
     number of counterparts, all of which together shall constitute one and the
     same instrument. The headings in this Agreement are for convenience





     of  reference only  and shall not  alter or  otherwise affect  the meaning
     hereof.

               (g) Severability. If any provision hereof is invalid or
     unenforceable in any jurisdiction, then, to the fullest extent permitted by
     law, the other provisions hereof shall remain in full force and effect in
     such jurisdiction and shall be liberally construed in favor of Secured
     Party in order to carry out the intentions of the parties hereto as nearly
     as may be possible, and the invalidity or unenforceability of any provision
     in any jurisdiction shall not affect the validity or enforceability of such
     provision in any other jurisdiction.

               (h) Other Documents. This Agreement supplements the Debenture and
     nothing in this Agreement shall be deemed to limit or supersede the rights
     granted to Secured Party in any Debenture. If any item of Collateral
     hereunder also constitutes collateral granted to Secured Party under any
     other mortgage, agreement or instrument, in the event of any conflict
     between the provisions of this Agreement and the provision of such other
     mortgage, agreement or instrument, the provision or provisions selected by
     Secured Party shall control with respect to such Collateral. In the event
     of any conflict between any provision of this Agreement and any provision
     of the Debenture, the provisions of the Debenture shall control to the
     extent of such inconsistency.

               (i) Other Debentures. The Debenture is one of a duly authorized
     issuance of _________________ Dollars ($_________) aggregate principal
     amount of Subordinated Convertible Debentures of the Company referred to in
     the Securities Purchase Agreement dated April 14, 1999, among the Company
     and the initial Holders, each of which shall be secured by the Collateral.
     The lien and securities interests held by the Holders of each of the series
     of Debentures shall be held pro-rata regardless of the time of perfection
     or attachment of the Security interests.

          13. SUBMISSION TO JURISDICTION. EACH DEBTOR HEREBY IRREVOCABLY SUBMITS
     TO THE NON-EXCLUSIVE JURISDICTION OF ANY UNITED STATES FEDERAL OR ILLINOIS
     STATE COURT SITTING IN COOK COUNTY, ILLINOIS IN ANY ACTION OR PROCEEDING
     ARISING OUT OF OR RELATING TO THIS AGREEMENT AND IRREVOCABLY AGREES THAT
     ALL CLAIMS IN RESPECT OF SUCH ACTION OR PROCEEDING MAY BE HEARD AND
     DETERMINED IN ANY SUCH COURT AND IRREVOCABLY WAIVES ANY OBJECTION IT MAY
     NOW OR HEREAFTER HAVE AS TO THE VENUE OF ANY SUCH SUIT, ACTION OR
     PROCEEDING BROUGHT IN SUCH A COURT OR THAT SUCH COURT IS AN INCONVENIENT
     FORUM. NOTHING HEREIN SHALL LIMIT THE RIGHT OF SECURED PARTY TO BRING
     PROCEEDINGS AGAINST DEBTOR IN THE COURTS OF ANY OTHER JURISDICTION. ANY
     JUDICIAL PROCEEDING BY ANY DEBTOR AGAINST SECURED PARTY OR ANY AFFILIATE
     THEREOF INVOLVING, DIRECTLY OR INDIRECTLY, ANY MATTER IN ANY WAY ARISING
     OUT OF, RELATED TO, OR CONNECTION WITH THIS AGREEMENT SHALL BE BROUGHT ONLY
     IN A COURT SITTING IN COOK COUNTY, ILLINOIS.

          14. WAIVER OF JURY TRIAL. EACH DEBTOR AND SECURED PARTY EACH WAIVE
     THEIR RESPECTIVE RIGHTS TO A TRIAL BY JURY OF ANY CLAIM OR CAUSE OF ACTION
     BASED UPON OR ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE
     TRANSACTIONS CONTEMPLATED HEREBY, IN ANY ACTION, PROCEEDING OR OTHER
     LITIGATION OF ANY TYPE BROUGHT BY ANY OF THE PARTIES AGAINST ANY OTHER
     PARTY OR PARTIES, WHETHER WITH RESPECT TO CONTRACT CLAIMS, TORT CLAIMS OR
     OTHERWISE. DEBT, LENDERS AND SECURED PARTY EACH AGREE THAT ANY SUCH CLAIM
     OR CAUSE OF ACTION SHALL BE TRIED BY A COURT TRIAL WITHOUT A JURY. WITHOUT
     LIMITING THE FOREGOING, THE PARTIES FURTHER AGREE THAT THEIR RESPECTIVE
     RIGHT TO A TRIAL BY JURY IS WAIVED BY OPERATION OF THIS SECTION AS TO ANY
     ACTION, COUNTERCLAIM OR OTHER PROCEEDING WHICH SEEKS, IN WHOLE OR IN PART,
     TO CHALLENGE THE VALIDITY OR ENFORCEABILITY OF THIS AGREEMENT OR THE OTHER
     LOAN DOCUMENTS OR ANY PROVISION HEREOF OR THEREOF. THIS WAIVER SHALL APPLY
     TO ANY SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO
     THIS AGREEMENT.

                                      * * * * *






          IN WITNESS WHEREOF, the parties have caused this Security Agreement to
     be duly executed and delivered as of the date first written above.

                                    DEBTORS:

                                   WESTELL TECHNOLOGIES, INC.


                                   By: 
                                        ------------------------------------
                                         Name: 
                                         Title:   


                                  WESTELL INC.


                                   By: 
                                        ------------------------------------
                                         Name: 
                                         Title:   



                                   WESTELL INTERNATIONAL, INC.


                                   By: 
                                        ------------------------------------
                                         Name: 
                                         Title:   



                                  SECURED PARTY


                                   By: 
                                        ------------------------------------
                                         Name: 
                                         Title:   



                                   SCHEDULE 1

                    FILING JURISDICTIONS AND COLLATERAL LOCATIONS


     FILING JURISDICTIONS



     COLLATERAL LOCATIONS




                                   SCHEDULE 2

                                      NAMES





                                   SCHEDULE 3

                                   COPYRIGHTS



                                   SCHEDULE 4

                                     PATENTS




                                   SCHEDULE 5

                                   TRADEMARKS

     TRADEMARK REGISTRATIONS

     FEDERAL TRADEMARKS

     Mark                     Registration No.                   Date





     STATE TRADEMARKS

     Mark                     Registration No.                   Date






                             TRADEMARK APPLICATIONS


     Mark                Trademark Application No.               Date Applied