Document:

<Page>
--------------------------------------------------------------------------------

                  AMENDED AND RESTATED STOCK PURCHASE AGREEMENT

                                  by and among

                                  SPIRENT PLC,
                                  SPIRENT B.V.,
                         SPIRENT INTERNATIONAL INC. and
                                  SPIRENT GMBH

                                       and

                            GENERAL ELECTRIC COMPANY

                         Dated as of September 10, 2001

--------------------------------------------------------------------------------

                                                            Amended and Restated
                                                        Stock Purchase Agreement

<Page>

                                TABLE OF CONTENTS

<Table>
<Caption>
                                                                                                  Page
                                                                                                  ----
<S>  <C>                                                                                            <C>
1.   Sale and Purchase...............................................................................1
     1.1      Sale and Purchase of the Shares........................................................1
     1.2      Closing................................................................................1
     1.3      [Reserved.]............................................................................2
     1.4      Consequences of Failure to Obtain Certain Consents.....................................2

2.   Representations and Warranties of the Sellers...................................................3
     2.1      Corporate Status and Authority of the Sellers..........................................3
     2.2      No Conflicts; Consents and Approvals, etc..............................................4
     2.3      Corporate Status of the Companies......................................................4
     2.4      Capitalization.........................................................................5
     2.5      Subsidiaries...........................................................................5
     2.6      Financial Statements...................................................................6
     2.7      Absence of Undisclosed Liabilities.....................................................6
     2.8      Real Property; Assets..................................................................6
     2.9      Contracts..............................................................................8
     2.10     Employment Agreements and Employee Plans etc...........................................9
     2.11     Intellectual Property.................................................................11
     2.12     Governmental Authorizations; Compliance with Law......................................12
     2.13     Litigation............................................................................12
     2.14     Taxes.................................................................................13
     2.15     Absence of Changes....................................................................13
     2.16     Environmental Matters.................................................................15
     2.17     Banking and Agency Arrangements.......................................................16
     2.18     Affiliate Transactions................................................................16
     2.19     Brokers...............................................................................16

3.   Representations and Warranties of the Purchaser................................................16
     3.1      Corporate Status and Authority........................................................16
     3.2      No Conflicts; Consents and Approvals, etc.............................................17
     3.3      Financial Ability to Perform..........................................................17
     3.4      Litigation............................................................................17
     3.5      Purchase for Investment...............................................................18
     3.6      Brokers...............................................................................18

4.   Covenants......................................................................................18
     4.1      Satisfaction of Closing Conditions....................................................18
     4.2      Conduct of Business, etc..............................................................18
     4.3      Access and Information................................................................19
     4.4      Taxes.................................................................................20
     4.5      Notifications; Supplements to Disclosures.............................................25
     4.6      Contact with Customers and Suppliers..................................................26
</Table>

                                                            Amended and Restated
                                        i               Stock Purchase Agreement
<Page>

<Table>
<S>  <C>                                                                                            <C>
     4.7      Publicity.............................................................................26
     4.8      Intercompany Accounts.................................................................26
     4.9      Indemnification of Directors and Officers.............................................27
     4.10     Non-Competition.......................................................................27
     4.11     Insurance.............................................................................28
     4.12     Korean Joint Ventures.................................................................28
     4.13     German Assets; Taunton Lease..........................................................28
     4.14     Local Purchase Agreements.............................................................28
     4.15     Bank Accounts.........................................................................29
     4.16     Change of Name; Discontinuance of Use of "Spirent"....................................29
     4.17     Transitional Services.................................................................29

5.   Employees and Employee Benefit Plans...........................................................29
     5.1      Continuation of Benefits..............................................................29
     5.2      401(k) Plan...........................................................................30
     5.3      UK Pension Schemes....................................................................31
     5.4      Seller Retained Liabilities...........................................................31

6.   Conditions Precedent...........................................................................31
     6.1      General...............................................................................31
     6.2      Conditions to Obligations of Both Parties.............................................31
     6.3      Conditions to Obligations of the Sellers..............................................32
     6.4      Conditions to Obligations of the Purchaser............................................32

7.   Indemnification................................................................................33
     7.1      Survival of Representations and Warranties............................................33
     7.2      Indemnification.......................................................................33

8.   [Reserved.]....................................................................................38

9.   General Provisions.............................................................................38
     9.1      Modification; Waiver..................................................................38
     9.2      Entire Agreement......................................................................38
     9.3      Certain Limitations...................................................................38
     9.4      Termination...........................................................................39
     9.5      Expenses..............................................................................40
     9.6      Further Actions.......................................................................40
     9.7      Post-Closing Access...................................................................40
     9.8      Notices...............................................................................41
     9.9      Assignment............................................................................42
     9.10     No Third Party Beneficiaries..........................................................42
     9.11     Counterparts..........................................................................42
     9.12     Interpretation; Disclosure Schedules..................................................42
</Table>

                                                            Amended and Restated
                                       ii               Stock Purchase Agreement
<Page>

<Table>
<S>  <C>                                                                                            <C>
     9.13     Governing Law.........................................................................43
     9.14     Consent to Jurisdiction, etc..........................................................43
     9.15     Tax Treatment of Indemnity Payments...................................................44
     9.16     Waiver of Punitive and Other Damages and Jury Trial...................................44
     9.17     Certain Definitions...................................................................45
</Table>

Exhibit A     Wholly-Owned Companies

Exhibit B-1   Majority-Owned Companies

Exhibit B-2   Designated Receivables Jurisdictions

Exhibit C     Allocation of Purchase Price

Exhibit D     Financial Statements

Exhibit E     U.K. Pension Schemes

Exhibit F     Form of German Asset Purchase Agreement

                                                            Amended and Restated
                                       iii              Stock Purchase Agreement
<Page>

                                  DEFINED TERMS

<Table>
<Caption>
Term                                                       Section
----                                                       -------
<S>                                                        <C>
Additional Transfer Agreements                             2.1

Affiliate                                                  9.17

Agreement                                                  Introduction

Ancillary Agreements                                       9.17

Applicable Percentage                                      9.17

Bond                                                       9.17

Business                                                   9.17

business day                                               9.17

Closing                                                    1.2

Closing Date                                               1.2

Code                                                       2.10(d)

Companies                                                  Recitals

Company                                                    Recitals

Company Employees                                          5.1(a)

Company Group                                              9.17

Confidentiality Agreement                                  4.3

control                                                    9.17

Damages                                                    7.2.1

Designated Receivables                                     Recitals

Dutch Asset Purchase Agreement                             9.17

Environmental Law                                          9.17

ERISA                                                      2.10(b)

Final Sale Date                                            1.4

Financial Statements                                       2.6

GAAP                                                       2.6

German Asset Purchase Agreement                            9.17

German Assets                                              2.8(d)

German Branch                                              9.17
</Table>

                                                            Amended and Restated
                                       iv               Stock Purchase Agreement
<Page>

<Table>
<S>                                                        <C>
German Liabilities                                         9.17

Guaranty                                                   9.17

Guarantor                                                  8.1

Hazardous Substance                                        9.17

HSR Act                                                    2.2(b)

Indemnitee                                                 7.2.3

Indemnitor                                                 7.2.3

Intellectual Property                                      2.11

knowledge                                                  9.17

Leased Real Property                                       2.8(a)

Leases                                                     2.8(b)

Licenses                                                   2.11

Liens                                                      2.2(a)

Local Purchase Agreement                                   4.14

Material Adverse Effect                                    2.2(a)

Non-Company Affiliates                                     2.18

Organizational Documents                                   9.17

Owned Intellectual Property                                2.11

Owned Real Property                                        2.8(a)

Permitted Liens                                            2.8(a)

Person                                                     9.17

Plans                                                      2.10(b)

Purchase Price                                             1.1

Purchaser                                                  Introduction

Purchaser Indemnity                                        7.2.1

Purchaser 401(k) Plan                                      5.2

Recovery                                                   7.2.5

Reduced Taxes                                              4.4(d)

Schedule                                                   2

Schedules                                                  2
</Table>

                                                            Amended and Restated
                                        v               Stock Purchase Agreement
<Page>

<Table>
<S>                                                        <C>
Seller 401(k) Plan                                         5.2

Sellers                                                    Introduction

Seller Indemnitees                                         7.2.2

Shares                                                     Recitals

Spirent B.V.                                               Introduction

Spirent GmbH                                               Introduction

Spirent International                                      Introduction

Spirent plc                                                Introduction

Straddle Period                                            4.4(b)

Straddle Return                                            4.4(c)

Subsidiary                                                 9.17

Taunton Lease                                              4.13(ii)

Taxes                                                      2.14

Tax Return                                                 2.14

Third Party Accountants                                    9.17

Unsold Company                                             1.4

U.S. Combined Income Taxes                                 9.17
</Table>

                                                            Amended and Restated
                                       vi               Stock Purchase Agreement
<Page>

                                                                    EXHIBIT 4.11

          AMENDED AND RESTATED STOCK PURCHASE AGREEMENT (this "AGREEMENT"),
dated as of September 10, 2001, among SPIRENT plc, a company formed under the
laws of England and Wales ("SPIRENT PLC"), Spirent B.V., a Netherlands
corporation ("SPIRENT B.V."), Spirent International Inc., a Delaware corporation
("SPIRENT INTERNATIONAL"), and Spirent GmbH ("SPIRENT GmbH"), a German
corporation (collectively, the "SELLERS"), and General Electric Company, a New
York corporation (the "PURCHASER").

                              W I T N E S S E T H :

     WHEREAS, the parties hereto have entered into an agreement, dated September
7, 2001, and are amending and restating such agreement as set forth herein;

     WHEREAS, the Sellers own all of the outstanding capital stock of each of
the companies listed on Exhibit A hereto and a majority of the outstanding
capital stock of each of the companies listed on Exhibit B-1 hereto
(collectively, the "COMPANIES," and each individually, a "COMPANY");

     WHEREAS, on the Closing Date (as defined in Section 1.2), the Sellers and
certain Non-Company Affiliates (as defined in Section 2.18) may, at their
discretion, hold certain loans receivable (the "DESIGNATED RECEIVABLES") (i)
from certain of the Companies or their Subsidiaries organized in the
jurisdictions specified on Exhibit B-2 hereto or (ii) as otherwise identified on
Exhibit B-2; and

     WHEREAS, subject to the terms and conditions set forth herein, the Sellers
wish to sell, and the Purchaser wishes to purchase, all of the capital stock of
the Companies owned by the Sellers (in the aggregate or with respect to an
individual Company, the "SHARES"), and the Designated Receivables.

     NOW, THEREFORE, the parties hereto agree as follows:

          1. SALE AND PURCHASE.

          1.1  SALE AND PURCHASE OF THE SHARES. Subject to the terms and
conditions of this Agreement, at the Closing, the Sellers shall sell or cause to
be sold, and the Purchaser shall purchase, the Shares of each Company, the
German Assets and the Designated Receivables for an aggregate amount equal to
US$220,000,000 less the amount, if any, of indebtedness of the Companies or any
of their Subsidiaries under the facilities specified in items (f) - (j) of
Schedule 4.1 that is not converted to Designated Receivables and that will
remain outstanding following the Closing (such net amount, the "PURCHASE
PRICE").

          1.2  CLOSING. The closing of the sale and purchase of the Shares and
the Designated Receivables (the "CLOSING") will take place at Debevoise &
Plimpton, 919

                                                            Amended and Restated
                                                        Stock Purchase Agreement

<Page>

Third Avenue, New York, New York at 10:00 a.m. New York time, on November 8,
2001 or at such other date and time as the parties shall have agreed to in
writing. The date on which the Closing shall occur is hereinafter referred to as
the "CLOSING DATE." At the Closing:

          (a)  the Sellers shall deliver to the Purchaser stock certificates
     representing the Shares of all of the Companies, endorsed or accompanied by
     stock powers in favor of the Purchaser, or other evidence of transfer
     reasonably satisfactory to the Sellers and the Purchaser;

          (b)  the Sellers shall assign or cause to be assigned to the Purchaser
     the Designated Receivables, such assignments to be in form and substance
     reasonably satisfactory to the Sellers and the Purchaser; and

          (c)  the Purchaser shall deliver, by wire transfer of immediately
     available funds to a previously designated account of Spirent plc (on
     behalf of the Sellers), the Purchase Price.

          1.3  [Reserved.]

          1.4  CONSEQUENCES OF FAILURE TO OBTAIN CERTAIN CONSENTS.

          (a)  In the event that either of the consents described in items (b)
     and (c) of Schedule 6.2.2 have not been obtained by the Closing Date, then
     the receipt of each such consent shall be deemed not to constitute a
     condition to the Closing of the sale and purchase of the Shares of the
     Companies other than Thermometrics Technologies Limited and/or
     Thermometrics Japan Co. Limited (each, if the consent relating thereto has
     not been obtained by the Closing Date, an "UNSOLD COMPANY") and of the
     Designated Receivables, if any, associated with such Unsold Company, as the
     case may be. The parties shall nevertheless on the Closing Date consummate
     the purchase and sale of the Shares and the Designated Receivables other
     than the Shares of each Unsold Company and any Designated Receivables
     associated therewith, PROVIDED that the Purchase Price shall be reduced by
     the amount allocated to each Unsold Company and any associated Designated
     Receivables on Exhibit C and the conditions to Closing set forth in Section
     6 shall not be required to be fulfilled with respect to any Unsold Company
     by the Closing Date.

          (b)  If an Unsold Company is excluded from the sale and purchase of
     the Shares of the Companies on the Closing Date, then, from the Closing
     Date until the last day of the sixth calendar month following the Closing
     Date (the "FINAL SALE DATE"), the parties shall, in cooperation with each
     other, use their reasonable best efforts to obtain the consent relating
     thereto by such Final Sale Date. With

                                                            Amended and Restated
                                        2               Stock Purchase Agreement
<Page>

     respect to each consent that is obtained on or prior to the Final Sale
     Date, the parties shall, within ten days after such consent is obtained,
     consummate the sale and purchase of the Shares of the Unsold Company to
     which such consent relates and any associated Designated Receivables, at a
     purchase price equal to the amount allocated to such Unsold Company and any
     such Designated Receivables on Exhibit C, and otherwise on the terms and
     conditions contained in this Agreement, subject to appropriate
     modifications and adjustments as are necessary to reflect that the
     transactions contemplated by this Agreement will have been consummated at
     different times with respect to different Companies. References in this
     Agreement (other than in this Section 1.4 and Section 4.10) to the "Closing
     Date" and the Closing shall, with respect to the Unsold Company, be deemed
     to refer to the date or time, as the case may be, on which the sale of such
     Company is actually consummated.

          (c)  If any Unsold Company has not been sold to the Purchaser by the
     Final Sale Date, this Agreement shall, subject to Section 9.4, terminate
     with respect to such Unsold Company and any associated Designated
     Receivables.

          2.   REPRESENTATIONS AND WARRANTIES OF THE SELLERS. The Sellers,
jointly and severally, represent and warrant to the Purchaser that, except as
set forth in the schedules attached to this Agreement (collectively, the
"SCHEDULES," and each individually, a "SCHEDULE"):

          2.1  CORPORATE STATUS AND AUTHORITY OF THE SELLERS. Each Seller is a
company duly incorporated or organized, validly existing and in good standing
under the laws of its jurisdiction of organization and has all requisite
corporate power and authority to own its properties and assets and to carry on
its business as now being conducted. Each Seller has the requisite corporate
power and authority to execute and deliver this Agreement, the Local Purchase
Agreements to which it is or will be a party and, in the case of Spirent GmbH,
the German Asset Purchase Agreement (the Local Purchase Agreements and the
German Asset Purchase Agreement, the "ADDITIONAL TRANSFER AGREEMENTS"), and to
perform its obligations hereunder and thereunder. The execution and delivery of
this Agreement and the Additional Transfer Agreements by the Sellers party
hereto and thereto and the performance of the Sellers' respective obligations
hereunder and thereunder have been duly authorized by each such Seller's board
of directors, which constitutes all necessary corporate action on the part of
the Sellers party hereto and thereto or any Affiliate of such Sellers for such
authorization. This Agreement has been, and each of the Additional Transfer
Agreements when executed and delivered will be, duly executed and delivered by
the Sellers party hereto and thereto and constitutes or will constitute the
valid and binding obligation of the respective Sellers, enforceable against each
of them in accordance with the terms of such agreement, except as limited by
laws affecting the enforcement of creditor's rights generally or by general
equitable principles.

                                                            Amended and Restated
                                        3               Stock Purchase Agreement
<Page>

          2.2  NO CONFLICTS; CONSENTS AND APPROVALS, ETC.

          (a)  The execution and delivery of this Agreement and the Additional
     Transfer Agreements by the Sellers party hereto and thereto and the
     performance of their respective obligations hereunder and thereunder will
     not result in (i) any conflict with the Organizational Documents of any
     Seller or of any member of any Company Group, (ii) subject to obtaining the
     consents referred to in Section 2.2(b), any breach or violation of or
     default under any law, statute, regulation, judgment, order, decree,
     license, permit or other governmental authorization or any mortgage, lease,
     agreement, deed of trust, indenture or any other instrument to which any
     Seller or any member of any Company Group is a party or by which any of
     them or any of their respective properties or assets or any of the Shares
     are bound, or (iii) subject to obtaining the consents referred to in
     Section 2.2(b), the creation or imposition of any liens, security
     interests, adverse claims, charges or encumbrances ("LIENS") on any Shares,
     any asset of any member of any Company Group or any German Asset, except
     for such breaches, violations or defaults and such Liens which would not,
     individually or in the aggregate, reasonably be expected to have a material
     adverse effect on the financial condition, business, assets (including the
     German Assets) or operations of the Company Groups and the German Branches
     taken as a whole (a "MATERIAL ADVERSE EFFECT").

          (b)  No consent, approval or authorization of or filing with any third
     party or any governmental authority is required on the part of any Seller
     or any member of any Company Group in connection with the execution and
     delivery of this Agreement or the Additional Transfer Agreements or the
     consummation of the transactions contemplated hereby and thereby, except
     (i) as set forth on Schedule 2.2(b), (ii) filings required with respect to
     the Hart-Scott-Rodino Antitrust Improvements Act of 1976 (the "HSR ACT")
     and (iii) filings, consents or approvals which, if not made or obtained,
     would not, individually or in the aggregate, reasonably be expected to have
     a Material Adverse Effect.

          2.3  CORPORATE STATUS OF THE COMPANIES. Each of the Companies is duly
incorporated or organized, validly existing and, to the extent applicable in the
jurisdiction in which each such Company is organized, in good standing under the
laws of its jurisdiction of organization. Each of the Companies has all
requisite corporate power and authority to conduct its business as now conducted
and to own or lease its properties now owned or leased. To the extent applicable
in the jurisdictions in which the Companies do business, each Company is duly
qualified to do business in each jurisdiction in which the failure to be so
qualified would, individually or in the aggregate, reasonably be expected to
have a Material Adverse Effect.

                                                            Amended and Restated
                                        4               Stock Purchase Agreement
<Page>

          2.4  CAPITALIZATION. Schedule 2.4 lists, with respect to each Company,
(i) the jurisdiction of its incorporation or organization, (ii) the shares of
its capital stock that are authorized and that are issued and outstanding, and
(iii) the ownership of such issued and outstanding shares. The Shares have been
duly authorized and validly issued and, to the extent applicable in the
jurisdictions in which the Companies are organized, are fully paid and
non-assessable. Except as disclosed on Schedule 2.4, and except for the issuance
of additional Shares to the Sellers in connection with the settlement of
intercompany accounts, as described in Schedule 4.8, there are no outstanding
options, warrants, conversion or other rights or agreements of any kind (other
than this Agreement and Additional Transfer Agreements) relating to the
issuance, sale, purchase, redemption, repurchase, conversion, exchange,
registration, control, voting or transfer of any shares of capital stock of any
of the Companies, and no authorization therefor has been given. Each Seller owns
beneficially and of record the Shares indicated on Schedule 2.4 as owned by such
Seller, free and clear of any Liens, except as disclosed therein. Upon delivery
to the Purchaser pursuant to Section 1.2, the Shares will be duly authorized and
validly issued and, to the extent applicable in the jurisdictions in which the
Companies are organized, fully paid and non-assessable, free of any preemptive
or subscription rights and free and clear of any Liens other than Liens created
by or resulting from the actions of the Purchaser or any of its Affiliates.

          2.5  SUBSIDIARIES.

          (a)  Each of the Subsidiaries of the Companies is duly incorporated or
     organized, validly existing and, if a corporation, to the extent applicable
     in the jurisdiction in which each such Subsidiary is organized, in good
     standing under the laws of its jurisdiction of organization. Each of the
     Subsidiaries of the Companies has all requisite corporate, partnership or
     limited liability company power and authority to conduct its business as
     now conducted and to own or lease its properties now owned or leased. To
     the extent applicable in the jurisdictions in which such Subsidiaries do
     business, each Subsidiary is duly qualified to do business in each
     jurisdiction in which the failure to be so qualified would, individually or
     in the aggregate, reasonably be expected to have a Material Adverse Effect.

          (b)  Schedule 2.5 lists, with respect to each Subsidiary of the
     Companies, (i) the jurisdiction of its incorporation or organization, (ii)
     the shares of its capital stock or other equity interests that are
     authorized and that are issued and outstanding, and (iii) the ownership of
     such issued and outstanding shares or other equity interests. All shares of
     capital stock of such Subsidiaries have been duly authorized and validly
     issued and, to the extent applicable in the jurisdictions in which such
     Subsidiaries are organized, are fully paid and non-assessable. There are no
     outstanding options, warrants, conversion or other rights or agreements of
     any kind relating to the issuance, sale, purchase, redemption, repurchase,

                                                            Amended and Restated
                                        5               Stock Purchase Agreement
<Page>

     conversion, exchange, registration, control, voting or transfer of any
     shares of capital stock or other equity interests of any of such
     Subsidiaries, and no authorization therefor has been given. Each Company
     and each Subsidiary thereof owns beneficially and of record the capital
     stock or other equity interests of its respective Subsidiaries indicated on
     Schedule 2.5 as owned by such Company or Subsidiary, free and clear of any
     Liens, except as disclosed therein. Except for the Subsidiaries of the
     Companies and of each such Subsidiary set forth on Schedule 2.5, none of
     the Companies or their Subsidiaries own, directly or indirectly, any
     capital stock or other equity securities of any corporation or has any
     direct or indirect equity or ownership interest in any partnership formed
     pursuant to a written partnership agreement, joint venture or other
     business.

          2.6  FINANCIAL STATEMENTS. Complete and correct copies of unaudited
balance sheets and related statements of income of the Company Groups and the
German Branches on a combined basis for the 1998, 1999 and 2000 fiscal years and
the six-month period ended June 30, 2001 are attached hereto as Exhibit D
(collectively, the "FINANCIAL STATEMENTS"). The Financial Statements were
prepared in accordance with United Kingdom generally accepted accounting
principles ("GAAP") applied (except as required to comply with changes to GAAP)
on a consistent basis throughout the periods presented, except that the
Financial Statements do not contain footnotes, and the Financial Statements
present fairly in all material respects the financial condition and results of
operations of the Company Groups and the German Branches on a combined basis as
of the dates or for the periods presented. The income statements included in the
Financial Statements reflect all of the business conducted by the Company Groups
during the periods presented.

          2.7  ABSENCE OF UNDISCLOSED LIABILITIES. Except for liabilities
reflected or reserved against in the Financial Statements or incurred in the
ordinary course of business since June 30, 2001, no member of any Company Group
or Spirent GmbH with respect to the German Branches has any liabilities, whether
known or unknown, absolute, accrued or contingent, other than (i) liabilities
that will be discharged prior to the Closing and (ii) other liabilities or
obligations which, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect.

          2.8  REAL PROPERTY; ASSETS.

          (a)  Schedule 2.8 lists all real property owned by any member of any
     Company Group or Spirent GmbH with respect to the German Branches (the
     "OWNED REAL PROPERTY") or leased by any member of any Company Group or
     Spirent GmbH with respect to the German Branches (the "LEASED REAL
     PROPERTY"). The Company Groups and Spirent GmbH with respect to the German
     Branches have good and marketable title to the Owned Real Property listed
     in Schedule 2.8 and good and valid leasehold interests in the Leased Real

                                                            Amended and Restated
                                        6               Stock Purchase Agreement
<Page>

     Property listed in Schedule 2.8 (other than the Taunton Lease, in which
     Spirent plc has a valid leasehold interest), in each case, free and clear
     of Liens, except for (i) Liens for taxes and other governmental charges and
     assessments which are not yet due and payable or which are being contested
     in good faith by appropriate proceedings and as to which reserves have been
     set aside in the Financial Statements to the extent required by GAAP, (ii)
     Liens of carriers, warehousemen, mechanics and materialmen and other like
     Liens arising in the ordinary course of business and as to which reserves
     have been set aside in the Financial Statements to the extent required by
     GAAP, (iii) easements, rights of way, title imperfections and restrictions,
     zoning ordinances and other similar encumbrances affecting the real
     property, (iv) statutory Liens in favor of lessors arising in connection
     with any property leased to any member of any Company Group or Spirent GmbH
     with respect to the German Branches, (v) Liens arising under the Contracts
     disclosed pursuant to Section 2.9, (vi) Liens created by this Agreement and
     the Additional Transfer Agreements, PROVIDED that in each case referred to
     in (i) through (vi) above, such Liens and encumbrances do not impair or
     prevent the use of the Owned Real Property or Leased Real Property as
     presently used, and (vii) any other Liens which do not materially interfere
     with the current use of the properties affected thereby ("PERMITTED
     LIENS").

          (b)  Each lease (including any option to purchase contained therein)
     pursuant to which any member of any Company Group or Spirent GmbH with
     respect to the German Branches leases any Leased Real Property (the
     "LEASES") is in full force and effect and, to the knowledge of the
     Sellers, is enforceable against the landlord which is party thereto in
     accordance with its terms. There exists no material default or event of
     default (or any event that with notice or lapse of time or both would
     become a material default) on the part of any member of any Company Group
     or Spirent GmbH with respect to the German Branches under any Lease. The
     Sellers have made available to the Purchaser complete and correct copies of
     all Leases including all amendments thereto. No member of any Company Group
     or Spirent GmbH with respect to the German Branches has received any
     written notice of any default under any Lease by which it leases any Leased
     Real Property nor any other termination notice with respect thereto.

          (c)  The Company Groups have legal and beneficial ownership of all
     tangible personal property and assets (other than the German Assets)
     reflected in the unaudited combined balance sheet as of June 30, 2001
     included in the Financial Statements, except for properties and assets
     disposed of in the ordinary course of business since the date of such
     balance sheet, in each case free and clear of Liens other than Permitted
     Liens. The Company Groups own or have the right to use all of the
     properties and assets necessary for the conduct of their Business. Each
     such tangible asset is in such condition and repair (subject to normal wear
     and tear) as is suitable for its current use, except for such exceptions as
     would not,

                                                            Amended and Restated
                                        7               Stock Purchase Agreement
<Page>

     individually or in the aggregate, reasonably be expected to have a Material
     Adverse Effect.

          (d)  Spirent GmbH has legal and beneficial ownership of all of the
     tangible personal property and assets to be transferred pursuant to the
     German Asset Purchase Agreement (the "GERMAN ASSETS"), in each case free
     and clear of Liens other than Permitted Liens. Each German Asset is in such
     condition and repair (subject to normal wear and tear) as is suitable for
     its current use, except for such exceptions as would not, individually or
     in the aggregate, reasonably be expected to have a Material Adverse Effect.

          2.9  CONTRACTS. Schedule 2.9 lists all agreements, contracts and
commitments of the following types to which any member of any Company Group is a
party or in which any German Branch is named as a party or which relate
exclusively to the operations of any German Branch or by which any member of any
Company Group or any German Branch or any of their properties are bound as of
the date hereof and will be bound following the Closing (other than real
property leases and labor or employment-related agreements, which are provided
for in Sections 2.8 and 2.10, respectively):

          (a)  joint venture, partnership, management and development
     agreements;

          (b)  mortgages, indentures, loan or credit agreements, guarantee
     agreements, pledge, security agreements and other agreements and
     instruments relating to the borrowing of money or extension of credit in
     any case in excess of US$250,000;

          (c)  (i) orders and other contracts or arrangements for the purchase
     or sale of materials, supplies, products or services (excluding contracts
     that are only in the form of customary purchase orders and other orders or
     contracts entered into in the ordinary course of business), (ii) contracts
     for the lease of personal property to or from any Person, and (iii)
     contracts or arrangements with distributors of or for the marketing of the
     products of the Company Groups or German Branches (excluding contracts with
     distributors that are only in the form of customary purchase orders) which,
     in each case, (x) are not cancelable by any member of any Company Group or
     Spirent GmbH with respect to the German Branches on notice of 60 days or
     less and (y) involve annual payments of at least US$50,000 or aggregate
     payments of at least US$250,000;

          (d)  contracts prohibiting or restricting the ability of any member of
     a Company Group or the German Branches to engage in any business or operate
     in any geographical area or to compete with any Person;

                                                            Amended and Restated
                                        8               Stock Purchase Agreement
<Page>

          (e)  acquisition or divestiture agreements relating to the acquisition
     or sale of any business, or of any capital stock of or other equity
     interest in any Person, by any member of a Company Group or Spirent GmbH
     with respect to the German Branches and containing continuing indemnity
     obligations of such member of a Company Group or Spirent GmbH with respect
     to the German Branches;

          (f)  contracts providing for future payments that are conditioned, in
     whole or in part, on a change in control of any member of the Company
     Groups;

          (g)  other agreements, contracts, arrangements and commitments which,
     in each case, (i) are not cancelable by any member of any Company Group on
     notice of 60 days or less and (ii) require payment by such Company Group
     member after the date hereof of more than US$250,000;

          (h)  contracts that are otherwise material to the Business of the
     Company Groups and the German Branches as a whole; and

          (i)  purchase orders of customers to whom aggregate sales by the
     Company Groups or the German Branches for the twelve-month period ending
     June 30, 2001 were in excess of US$1,000,000.

     The Sellers have made available to the Purchaser copies of all of the
contracts listed in Schedule 2.9. Each such contract is a valid and binding
agreement of the relevant member of a Company Group or Spirent GmbH with respect
to the German Branches, is in full force and effect and, to the knowledge of the
Sellers, is enforceable against the parties thereto. No member of any Company
Group or Spirent GmbH with respect to the German Branches nor, to the knowledge
of the Sellers, any other Person is in default under any of the contracts listed
in Schedule 2.9, except for such defaults which would not, individually or in
the aggregate, reasonably be expected to have a Material Adverse Effect.

          2.10 EMPLOYMENT AGREEMENTS AND EMPLOYEE PLANS ETC.

          (a)  EMPLOYMENT AGREEMENTS. Schedule 2.10(a) lists all written
     agreements, contracts and commitments of the following types to which any
     member of any Company Group or Spirent GmbH with respect to the German
     Branches is a party or which relate to the current employment of any
     Company Employee: (i) employment and consulting agreements (including
     severance and retention agreements) and (ii) collective bargaining
     agreements.

          (b)  EMPLOYMENT PLANS. Schedule 2.10(b) lists all "employee benefit
     plans" as defined in section 3(3) of the Employee Retirement Income
     Security Act of 1974 ("ERISA") (whether or not such plans are subject to
     ERISA), maintained

                                                            Amended and Restated
                                        9               Stock Purchase Agreement
<Page>

     by or covering employees of any member of any Company Group and any other
     plans, programs, policies or other arrangements (other than those listed in
     Schedule 2.10(a)) including profit sharing, pension, retirement, bonus,
     incentive compensation, stock option, deferred compensation or other
     written material employee benefit plans, agreements, contracts or
     commitments for the benefit of the employees of any member of any Company
     Group, including such plans of the Sellers or any Affiliate of the Sellers
     covering employees of any member of any Company Group or plans in which
     employees of any member of any Company Group participate (collectively, the
     "PLANS").

          (c)  GENERAL COMPLIANCE. The Companies have made all contributions
     required to have been made under the terms of any Plan or pursuant to any
     applicable collective bargaining agreement or applicable law within the
     time prescribed by any such Plan, agreement or law and each Plan has been
     operated and administered in accordance with its terms and applicable law,
     except for any failures to make plan contributions, to so operate or
     administer that, individually or in the aggregate, have not had or resulted
     in a Material Adverse Effect.

          (d)  U.S. COMPANIES.

               (i)  ERISA. All Plans that are subject to ERISA comply in all
          respects with the requirements of ERISA and the Internal Revenue Code
          of 1986, as amended (the "CODE"), except for any failures to comply
          which would not, individually or in the aggregate, reasonably be
          expected to have a Material Adverse Effect. No Plan (other than a
          multiemployer plan as defined in section 3(37) of ERISA) to which
          either the Seller or any member of the same controlled group of
          corporations as the Seller, within the meaning of section 4001(a)(3)
          of ERISA, contributes and which is subject to Part 3 of Subtitle B of
          Title I of ERISA has incurred any "accumulated funding deficiency"
          within the meaning of section 302 of ERISA or section 412 of the Code
          and no material liability (other than for annual premiums) to the
          Pension Benefit Guaranty Corporation has been incurred by any member
          of any Company Group with respect to any such Plan. No member of any
          Company Group has incurred any material liability for any tax or
          penalty imposed by section 4975 of the Code or section 502(i) of
          ERISA. No member of any Company Group has made a complete or partial
          withdrawal from any multiemployer plan as defined in section 3(37) of
          ERISA so as to incur any partial or full withdrawal liability under
          section 4201 of ERISA (without regard to subsequent reduction or
          waiver of such liability under section 4207 or 4208 of the Code).
          There are no material pending or, to the Sellers' knowledge,
          threatened claims by or on behalf of any of the Plans or by any
          employee involving any such Plan (other than routine claims for
          benefits).

                                                            Amended and Restated
                                       10               Stock Purchase Agreement
<Page>

               (ii) TAX QUALIFICATION. Each Plan intended to be qualified under
          section 401(a) of the Code, and the trust (if any) forming a part
          thereof, has received a favorable determination letter from the IRS as
          to its qualification under the Code and to the effect that each such
          trust is exempt from taxation under section 501(a) of the Code, and,
          nothing has occurred since the date of such determination letter that
          will adversely affect such qualification or tax-exempt status.

          (e)  There are no pending or, to the knowledge of the Sellers,
     threatened labor grievances or unfair labor practice claims or charges
     against any member of any Company Group or with respect to the German
     Branches which, individually or in the aggregate, would have a Material
     Adverse Effect. As of the date hereof, (i) to the knowledge of the Sellers,
     there are no organizing efforts by any union or other group seeking to
     represent any employees of any member of the Company Groups or the German
     Branches except as set forth on Schedule 2.10 and (ii) there are no strikes
     or other material labor disputes against any member of the Company Groups
     or the German Branches pending or, to the knowledge of the Sellers,
     threatened.

          2.11 INTELLECTUAL PROPERTY. Schedule 2.11 lists all material
trademarks, trade names, service marks, copyrights, patents and similar rights
that are registered or subject to an application for registration (collectively,
"INTELLECTUAL PROPERTY") owned in whole or in part by any member of a Company
Group and used by such member of a Company Group in its Business or owned in
whole or in part by Spirent GmbH and used in the Business of any German Branch
("OWNED INTELLECTUAL PROPERTY"). Except for Permitted Liens, the Company Groups
and Spirent GmbH with respect to the German Branches own the Owned Intellectual
Property free and clear of all Liens. The Company Groups have taken commercially
reasonable steps in accordance with normal industry practice to protect and
maintain in force the Owned Intellectual Property and trade secrets used in the
operation of their business. No member of any Company Group or Spirent GmbH with
respect to the German Branches has received any written notice or claim that it
is infringing on the Intellectual Property or trade secret rights of any Person
and the Sellers have no knowledge of any infringement by any Person of the Owned
Intellectual Property or trade secret rights owned by any member of a Company
Group or Spirent GmbH with respect to the German Branches. Schedule 2.11 sets
forth a complete and correct list, as of the date hereof, of all material
written licenses to Intellectual Property or trade secret rights (other than
licenses for "off-the-shelf" software) to which any member of any Company Group
or Spirent GmbH with respect to the German Branches is a party, pursuant to
which (x) such member of a Company Group or Spirent GmbH with respect to the
German Branches permits any Person or entity to use any of the Owned
Intellectual Property or trade secret rights owned by such member of a Company
Group or Spirent GmbH with respect to the German Branches, or (y) any Person or
entity permits such member of a Company Group or Spirent GmbH with respect to
the German

                                                            Amended and Restated
                                       11               Stock Purchase Agreement
<Page>

Branches to use any trademarks, trade names, service marks, copyrights, trade
secret rights or patents not owned by such member of a Company Group or Spirent
GmbH with respect to the German Branches (collectively, the "LICENSES"). The
Seller has made available to the Purchaser complete and correct copies of the
Licenses. No member of any Company Group or Spirent GmbH with respect to the
German Branches, nor, to the Sellers' knowledge, any other party to a License,
is in default under such License, and each License is in full force and effect
as to each member of any Company Group party thereto or as to Spirent GmbH to
the extent Spirent GmbH is party to any such License with respect to the German
Branches, as the case may be, and to the Sellers' knowledge, as to each other
party thereto, except for such defaults and failures to be so in full force and
effect as, individually or in the aggregate, would not reasonably be expected to
have a Material Adverse Effect. The Owned Intellectual Property identified in
Schedule 2.11, together with the rights granted to the members of the Company
Groups and Spirent GmbH with respect to the German Branches under the Licenses
identified in Schedule 2.11 and any licenses for off-the-shelf software not on
Schedule 2.11, constitutes all the material Intellectual Property used by the
members of the Company Groups and the German Branches in the operation of their
business as it is currently conducted and no other material Intellectual
Property rights or Licenses are necessary to operate such business after the
Closing Date in substantially the same manner as such business has been operated
by the members of the Company Groups and the German Branches prior thereto.

          2.12 GOVERNMENTAL AUTHORIZATIONS; COMPLIANCE WITH LAW. The Company
Groups and Spirent GmbH with respect to the German Branches, as required, hold
all licenses, permits and other governmental authorizations material to their
respective Businesses, and each member of the Company Groups and Spirent GmbH
with respect to the German Branches is in compliance with all laws, statutes,
rules, regulations, judgments, orders, decrees, permits, concessions, franchises
or other governmental or regulatory authorizations or approvals, whether U.S.
federal, state or local or non-U.S., applicable to it or to any of its
properties, except for such failures to comply which would not, individually or
in the aggregate, reasonably be expected to have a Material Adverse Effect. This
Section 2.12 does not relate to employee benefits matters, which are the subject
of Section 2.10, tax matters, which are the subject of Section 2.14, or
environmental matters, which are the subject of Section 2.16.

          2.13 LITIGATION. There are no judicial or administrative actions,
proceedings or investigations pending or, to the knowledge of the Sellers,
threatened against any Seller or against any member of any Company Group or
Spirent GmbH with respect to the German Branches and there are no judgments or
outstanding orders, injunctions, decrees, stipulations or awards rendered by a
governmental, judicial or administrative authority against any member of the
Company Groups, the German Branches or any of their properties or Business which
(i) if determined adversely, individually or in the aggregate, would reasonably
be expected to have a Material

                                                            Amended and Restated
                                       12               Stock Purchase Agreement
<Page>

Adverse Effect, or (ii) question the validity of this Agreement or the
Additional Transfer Agreements or any action taken or to be taken by any Seller
or by any member of any Company Group in connection herewith or therewith.

          2.14 TAXES. Except as disclosed on Schedule 2.14, (i) each member of
the Company Groups (including for this specific purpose Spirent GmbH, but only
with respect to the German Branches), and any affiliated group, within the
meaning of Section 1504 of the Code, of which any member of the Company Groups
is a member, has filed or caused to be filed, in a timely manner (within any
applicable extension periods) all material Tax Returns relevant to the members
of the Company Groups required to be filed by the Code or by applicable state,
local or foreign laws in respect of Taxes, (ii) all such Tax Returns are correct
and complete in all material respects, (iii) all Taxes due and payable with
respect to the periods covered by such Tax Returns have been paid in full when
due and payable and the Financial Statements reflect adequate reserves in
accordance with GAAP for all Taxes not yet due and payable, (iv) with respect to
U.S. Companies and their U.S. Subsidiaries no member of the Company Groups is a
party to any agreement, contract, arrangement or plan that would be likely to
result, separately or in the aggregate, in connection with this Agreement or any
change of control of any member of the Company Groups, in the payment of any
"excess parachute payments" within the meaning of Section 280G of the Code, (v)
no member of the Company Groups is a party to any tax sharing agreements or
similar agreement, (vi) all employment and withholding Taxes required to be paid
or withheld by or on behalf of any member of any Company Group have been paid or
properly set aside in accounts for such purpose, (vii) no written agreement or
other document extending, or having the effect of extending, the period of
assessment or collection of any Taxes payable by any member of any Company Group
is currently in effect, (viii) no member of any Company Group is, as of the date
hereof, the beneficiary of any extension of time (other than an automatic
extension of time not requiring the consent of the Internal Revenue Service or
any other taxing authority) within which to file any Tax Return not previously
filed, (ix) no amount will be required to be deducted or withheld pursuant to
section 1445(a) of the Code in connection with the transactions contemplated by
this Agreement and (x) as of the date hereof, there are not pending any audits,
examinations, investigations or other proceedings in respect of Taxes payable by
any member of any Company Group. "TAXES" means all U. S. or non-U.S. federal,
national, state or local taxes, assessments, levies or other governmental
charges in the nature of taxes, including all income, franchise, withholding,
unemployment insurance, social security, PAYE, sales, use, excise, real and
personal property, stamp, transfer, VAT and workers' compensation taxes,
together with all interest, penalties and additions payable with respect
thereto. "TAX RETURN" means all returns and reports required to be supplied to a
taxing authority relating to Taxes.

          2.15 ABSENCE OF CHANGES. Since June 30, 2001, other than in connection
with the transactions contemplated by this Agreement and the Additional Transfer

                                                            Amended and Restated
                                       13               Stock Purchase Agreement
<Page>

Agreements (including without limitation the elimination of intercompany
accounts pursuant to Section 4.8), (x) the Company Groups have conducted their
business, and Spirent GmbH has conducted the business of the German Branches, in
the ordinary course, in substantially the same manner in which it has been
previously conducted, (y) no events or circumstances have occurred that,
individually or in the aggregate, would reasonably be expected to have a
Material Adverse Effect (other than events or circumstances that generally
affect companies that do business in the industry or jurisdictions in which the
members of the Company Groups do business), and (z) neither any member of any
Company Group nor, where applicable in clauses (b), (d) and (e) to the German
Branches, Spirent GmbH has:

          (a)  purchased, acquired, issued, sold or redeemed any of its shares
     of capital stock or ownership interests;

          (b)  mortgaged, pledged or subjected to any Lien any of its properties
     or assets (including the German Assets), except for Liens incurred in the
     ordinary course of business and Permitted Liens;

          (c)  except as required by GAAP, made any material change in its
     accounting principles or the methods by which such principles are applied
     for financial reporting purposes;

          (d)  increased the compensation of any officer or Company Employee
     other than (i) in the ordinary course of business or (ii) to comply with
     applicable law;

          (e)  disposed or agreed to dispose of any material properties or
     assets, including the German Assets, used in the conduct of their business,
     other than in the ordinary course of business; or

          (f)  canceled or forgiven any debts or claims except in the ordinary
     course of business;

PROVIDED, HOWEVER, that no provision of this Agreement shall restrict the
ability of any member of any Company Group or Spirent GmbH to distribute all or
any portion of its cash, cash equivalents and intercompany accounts receivable
or use all or any portion of its cash and cash equivalents, through legal
dividends to its stockholders, repayment of outstanding liabilities or
otherwise.

                                                            Amended and Restated
                                       14               Stock Purchase Agreement
<Page>

          2.16 ENVIRONMENTAL MATTERS. Except as would not reasonably be expected
to have a Material Adverse Effect:

          (a)  the Company Groups, the German Branches, the Owned Real Property
     and the Leased Real Property are in compliance with all applicable
     Environmental Laws;

          (b)  the Company Groups and the German Branches have obtained, and are
     in compliance with, all permits and authorizations required under
     applicable Environmental Laws;

          (c)  no member of any Company Group or Spirent GmbH with respect to
     the German Branches has received from any governmental authority or Person
     any notice of violation, alleged violation, non-compliance, liability or
     potential liability regarding compliance with or liability under applicable
     Environmental Laws and, to the knowledge of the Sellers, there are no facts
     or circumstances that would reasonably be expected to form the basis of any
     liability or claim against the Company Groups or Spirent GmbH with respect
     to the German Branches regarding compliance with or liability under
     Environmental Laws;

          (d)  no judicial proceeding or governmental or administrative action
     is pending or, to the knowledge of the Sellers, threatened, under any
     applicable Environmental Law pursuant to which any member of any Company
     Group or Spirent GmbH with respect to the German Branches is or, to the
     knowledge of the Sellers, will be named as a party;

          (e)  no member of any Company Group or Spirent GmbH with respect to
     the German Branches has entered into any agreement with any governmental
     authority or Person pursuant to which such member of a Company Group or
     Spirent GmbH with respect to the German Branches has assumed responsibility
     for the remediation of any condition resulting from the release, treatment,
     storage or disposal of Hazardous Substances;

          (f)  to the knowledge of the Sellers, all material environmental site
     assessments, compliance audits and remediation studies relating to
     environmental conditions at the Owned Real Property and the Leased Real
     Property prepared by or for any Seller, or by or for any member of any
     Company Group or any German Branch since such member of a Company Group or
     such German Branch has been owned or controlled (directly or indirectly) by
     a Seller, have been made available to the Purchaser; and

          (g)  nothing set forth in the Schedules would reasonably be expected
     to form the basis for a liability or claim against the Company Groups or
     Spirent

                                                            Amended and Restated
                                       15               Stock Purchase Agreement
<Page>

     GmbH with respect to the German Branches regarding compliance with or
     liability under Environmental Laws that would have a Material Adverse
     Effect.

     Notwithstanding any of the representations and warranties contained
elsewhere in this Agreement, environmental matters shall be governed exclusively
by this Section 2.16.

          2.17 BANKING AND AGENCY ARRANGEMENTS. Schedule 2.17 sets forth a list
of:

          (a)  each bank or similar financial institution in which any member of
     any Company Group or any German Branch has an account or safe deposit box
     or other custodial arrangement and the numbers of such accounts or safe
     deposit boxes maintained by such member of a Company Group or such German
     Branch; and

          (b)  the names of all persons authorized to draw on each such account
     or to have access to any such safe deposit box facility or custodial
     arrangement.

          2.18 AFFILIATE TRANSACTIONS. Except as listed on the Schedules, no
member of any Company Group or Spirent GmbH with respect to the German Branches
is a party to any written or enforceable oral agreement with (a) any of its
directors or officers or (b) any Seller or any Affiliate of any Seller other
than any of the members of the Company Groups or Spirent GmbH with respect to
the German Branches (such Affiliates, "NON-COMPANY AFFILIATES"). Schedule 2.18
sets forth a list of all material services provided by any Seller or Non-Company
Affiliate to any member of any Company Group or any German Branch, whether
pursuant to a written agreement or otherwise.

          2.19 BROKERS. All negotiations relating to this Agreement and the
Additional Transfer Agreements and the transactions contemplated hereby and
thereby have been carried out without the intervention of any Person acting on
behalf of any Seller or any Company in such manner as to give rise to any valid
claim against the Purchaser or any member of any Company Group for any brokerage
or finder's commission, fee or similar compensation, except for Morgan Stanley &
Co. Limited, whose fees and expenses in respect hereof and thereof will be the
responsibility of the Sellers or one or more Non-Company Affiliates.

          3. REPRESENTATIONS AND WARRANTIES OF THE PURCHASER. The Purchaser
represents to the Sellers as follows:

          3.1  CORPORATE STATUS AND AUTHORITY. The Purchaser is a corporation
duly organized, validly existing and in good standing under the laws of its
jurisdiction of organization or has the power to carry on its business as now
being conducted. The

                                                            Amended and Restated
                                       16               Stock Purchase Agreement
<Page>

Purchaser has the requisite corporate power and authority to execute and deliver
this Agreement and the Additional Transfer Agreements and perform its
obligations hereunder and thereunder. The execution, delivery and performance of
this Agreement and the Additional Transfer Agreements have been duly authorized
by the board of directors of the Purchaser, which constitutes all necessary
corporate action on the part of such entity for such authorization. This
Agreement has been, and each of the Additional Transfer Agreements when executed
and delivered will be, duly executed and delivered by the Purchaser and
constitutes or will constitute the valid and binding obligation of the
Purchaser, enforceable against it in accordance with the terms of such
agreement, except as limited by laws affecting the enforcement of creditors'
rights generally or by general equitable principles.

          3.2  NO CONFLICTS; CONSENTS AND APPROVALS, ETC.

          (a)  The execution and delivery of this Agreement and the Additional
     Transfer Agreements by the Purchaser and the performance of its obligations
     hereunder and thereunder will not result in (i) any conflict with the
     Organizational Documents of the Purchaser, (ii) any breach or violation
     of or default under any law, statute, regulation, judgment, order, decree,
     license, permit or other governmental authorization or any mortgage,
     lease, agreement, deed of trust, indenture or any other instrument to which
     the Purchaser is a party or by which the Purchaser or any of its properties
     or assets are bound, or (iii) the creation or imposition of any Lien on any
     assets of the Purchaser, except for such breaches, violations or defaults
     and such Liens which would not, individually or in the aggregate, impair
     the ability of the Purchaser to fulfill its obligations hereunder.

          (b)  No consent, approval or authorization of or filing with any third
     party or governmental authority is required on the part of the Purchaser in
     connection with the execution and delivery of this Agreement or the
     Additional Transfer Agreements or the consummation of the transactions
     contemplated hereby and thereby, except (i) as set forth on Schedule
     3.2(b), (ii) filings required with respect to the HSR Act and (iii) for
     such other consents, approvals, authorizations, and filings the failure to
     obtain which would not adversely affect the ability of the Purchaser to
     consummate its obligations hereunder.

          3.3  FINANCIAL ABILITY TO PERFORM. The Purchaser has available cash
funds sufficient to consummate the transactions contemplated by this Agreement
and the Additional Transfer Agreements.

          3.4  LITIGATION. There are no judicial or administrative actions,
proceedings or investigations involving the Purchaser that are pending or, to
the knowledge of the Purchaser, threatened, which question the validity of this
Agreement or

                                                            Amended and Restated
                                       17               Stock Purchase Agreement
<Page>

the Additional Transfer Agreements or any action taken or to be taken by it in
connection herewith or therewith.

          3.5  PURCHASE FOR INVESTMENT. The Purchaser is acquiring the Shares
and Designated Receivables for investment and not with a view toward any resale
or distribution thereof except in compliance with the Securities Act of 1933, as
amended.

          3.6  BROKERS. All negotiations relating to this Agreement and the
Additional Transfer Agreements and the transactions contemplated hereby and
thereby have been carried out without the intervention of any Person acting on
behalf of the Purchaser in such manner as to give rise to any valid claim
against the Seller or any of its Affiliates for any brokerage or finder's
commission, fee or similar compensation.

          4.   COVENANTS.

          4.1  SATISFACTION OF CLOSING CONDITIONS. The parties shall use their
commercially reasonable best efforts to bring about the satisfaction as soon as
practicable of all the conditions to Closing contained in Section 6. Without
limiting the generality of the foregoing, the parties shall apply for and
diligently prosecute all applications for, and shall use their commercially
reasonable best efforts promptly to obtain, such consents, waivers, releases,
authorizations and approvals from such third parties and governmental
authorities as shall be necessary to permit the consummation of the transactions
contemplated by this Agreement and the Additional Transfer Agreements or to
avoid a Material Adverse Effect including, without limitation, (i) making the
requisite filings with the Federal Trade Commission and the Antitrust Division
of the Department of Justice pursuant to the HSR Act, as well as any filings
with, or submissions to, any governmental, regulatory or administrative
authority in any jurisdiction where such filing or submission is required in
connection with the transactions contemplated by this Agreement and the
Additional Transfer Agreements, and (ii) in the case of the Purchaser, using
commercially reasonable best efforts to deliver replacement guaranties, bonds or
other undertakings, as the case may be, and/or other consideration to the
beneficiaries of the Guaranties and Bonds listed on Schedule 4.1 and any other
Guaranties or Bonds issued or obtained in the ordinary course of business prior
to the Closing Date on substantially similar terms as such Guaranties and Bonds,
and obtaining the complete and unconditional release of the Sellers and any
Non-Company Affiliates from all obligations in connection with all of such
Guaranties and Bonds.

          4.2  CONDUCT OF BUSINESS, ETC.

          (a)  From the date hereof until the Closing, except for (i) entering
     into and performing under this Agreement and the Additional Transfer
     Agreements, (ii) the matters referred to in Schedule 4.2, (iii) the effect
     of the consummation of the transactions contemplated by this Agreement and
     the Additional Transfer

                                                            Amended and Restated
                                       18               Stock Purchase Agreement
<Page>

     Agreements and (iv) as otherwise consented to by the Purchaser in writing,
     such consent not to be unreasonably withheld, the Sellers shall cause the
     Company Groups and the German Branches to conduct their Business in the
     ordinary course in substantially the same manner in which it previously has
     been conducted and not take any action that would cause a breach of Section
     2.15.

          (b)  Notwithstanding Section 4.2(a), except as contemplated by this
     Agreement and the Additional Transfer Agreements, the Sellers shall cause
     each member of the Company Groups not to, and Spirent GmbH shall not with
     respect to the German Branches, without the prior written approval of the
     Purchaser, which shall not be unreasonably withheld:

               (i)   amend its Organizational Documents;

               (ii)  incur any third party indebtedness for borrowed money,
          except for (x) borrowings in the ordinary course of business
          consistent with past practice and (y) indebtedness that will be
          discharged prior to or on the Closing Date or refinanced by loans that
          give rise to Designated Receivables;

               (iii) make any acquisition or disposition of capital stock or
          other securities or assets of any Person outside of the ordinary
          course of business and in excess of $250,000, excluding all
          acquisitions of inventory and equipment in the ordinary course of
          business consistent with past practice;

               (iv)  adopt, amend in any material respect, enter into or
          terminate any Plan, severance plan, collective bargaining agreement,
          employment contract or make awards or distributions under any Plan,
          except awards or distributions to any participant or employee in the
          ordinary course consistent with past practice;

               (v)   make any election inconsistent with past practice relating
          to Taxes unless such election is required by law or would not
          reasonably be expected to have a Material Adverse Effect; or

               (vi)  agree, commit or resolve to do or authorize any of the
          foregoing.

          4.3  ACCESS AND INFORMATION.

          From the date hereof until the Closing, the Sellers shall cause the
     Company Groups to give the Purchaser and its representatives reasonable
     access at all reasonable times to the properties, books and records of the
     Company

                                                            Amended and Restated
                                       19               Stock Purchase Agreement
<Page>

     Groups and to furnish such information and documents in their possession
     relating to the Company Groups as the Purchaser may reasonably request, and
     Spirent GmbH shall give the Purchaser and its representatives reasonable
     access at all reasonable times to the properties, books and records of the
     German Branches and shall furnish such information and documents in its
     possession relating to the German Branches as the Purchaser may reasonably
     request, PROVIDED that in each case the Purchaser shall not be entitled to
     any such access, information or documents for the purposes of conducting
     any environmental audit or assessment without the prior written consent of
     the Spirent plc. All such information and documents obtained by the
     Purchaser shall be subject to the terms of the Confidentiality Agreement,
     dated June 19, 2001 (the "CONFIDENTIALITY AGREEMENT"), between the
     Purchaser and Spirent plc with respect to the transactions contemplated by
     this Agreement and the Additional Transfer Agreements. The Purchaser hereby
     agrees that the provisions of the Confidentiality Agreement will apply to
     any properties, books, records, data, documents and other information
     relating to the Sellers or any Non-Company Affiliate provided to the
     Purchaser or its Affiliates or any of their respective advisers or
     employees pursuant to this Agreement whether before or after the Closing.

          4.4  TAXES.

          (a)  INDEMNITY. Except as otherwise provided in Section 4.4(h), the
     Sellers shall pay (without duplication of amounts otherwise payable), and
     shall indemnify and hold harmless the Purchaser from and against, (i) all
     liability for Taxes of, or with respect to, any member of the Company
     Groups or any German Branch (other than any liability described in Section
     4.4(a)(ii)) and (ii) all liability of any member of the Company Groups for
     Taxes (as a result of Treasury Regulationss.1.1502-6(a) or otherwise) of
     the Sellers or any other corporation which is or has been affiliated with
     any member of the Company Groups prior to the Closing, in each case for
     taxable periods (or portions thereof in the case of a Straddle Period)
     ending on or before the Closing Date to the extent such Taxes exceed the
     reserves for Taxes reflected in the June 30, 2001 balance sheet in the
     Financial Statements (other than reserves for deferred Taxes or U.S.
     Combined Income Taxes) including, without limitation, reasonable
     out-of-pocket attorneys' fees and other costs attributable to the
     assessment and collection thereof, other than any such Taxes directly
     attributable to any act or omission by the Purchaser (including, without
     limitation, making an election pursuant to Sections 338 or 336(e) of the
     Code or any similar provision of U.S. state or local or non-U.S. law) or,
     after the Closing, any member of the Company Groups (other than any such
     action or omission expressly required by applicable law or expressly
     required or expressly permitted by this Agreement). Notwithstanding the
     foregoing sentence, the amount that the Sellers shall be required to pay to
     the Purchaser for Taxes of or

                                                            Amended and Restated
                                       20               Stock Purchase Agreement
<Page>

     payable by any Company listed on Exhibit B-1 hereto or any of such
     Company's Subsidiaries or Thermometrics Beijing shall be the product of the
     amount otherwise required to be paid pursuant to the first sentence of this
     Section 4.4(a) and the Applicable Percentage. The Purchaser shall, or shall
     cause the applicable member of the Company Groups or any German Branch to,
     pay and indemnify and hold harmless the Sellers from and against (x) all
     Taxes of, with respect to or payable by such member or such German Branch
     which are not described as being the responsibility of the Sellers in the
     first two sentences of this Section 4.4(a), (y) any Taxes (other than U.S.
     Combined Income Taxes) resulting from the failure of such member or such
     German Branch to pay, after the Closing Date, Taxes reflected in the June
     30, 2001 balance sheet in the Financial Statements and (z) any Taxes
     resulting from an election made by Purchaser under Sections 338 or 336(e)
     of the Code or any similar provision of U.S. state or non-U.S. local law
     (including in the case of each of the foregoing clauses, and without
     limitation, reasonable out-of-pocket attorneys' fees and other costs
     attributable to the assessment and collection thereof).

          (b)  STRADDLE PERIOD. The Purchaser and the Sellers shall, to the
     extent permitted by applicable law, elect with the relevant taxing
     authority to close the taxable period of each member of any Company Group
     on the Closing Date. Where a taxable period begins before the Closing Date
     and ends after the Closing Date (a "STRADDLE PERIOD"), the portion of any
     Taxes in such Straddle Period that are allocable to the portion of the
     period ending on the Closing Date shall be determined using the interim
     closing of the books method as of the Closing Date, except that (A)
     exemptions, allowances or deductions that are calculated on an annual basis
     shall be apportioned on a per diem basis, and (B) real and personal
     property taxes shall likewise be apportioned on a per diem basis.

          (c)  RETURNS. The Sellers shall prepare or cause to be prepared and
     shall timely file or cause to be timely filed all Tax Returns in
     respect of each member of any Company Group and each German Branch (i) that
     are required to be filed on or prior - to the Closing Date or (ii) that
     relate to any taxable period ending on or before the Closing Date and that
     are not required to be filed on or prior to the Closing Date except, in
     the case of this clause (ii), Tax Returns in respect of VAT or the United
     Kingdom PAYE Tax. The Purchaser shall cooperate with the Sellers to enable
     the Sellers to file any such Tax Returns after the Closing Date including,
     without limitation, by making available to the Sellers knowledgeable
     personnel of the Companies or their respective Subsidiaries and by
     consenting to the Sellers' use of external advisors of the Companies or
     their respective Subsidiaries in connection with preparing such Tax
     Returns. The Purchaser shall prepare or cause to be prepared and file or
     cause to be filed all other Tax Returns in respect of each member of any
     Company Group and each German Branch that are not required to be prepared
     by the Sellers pursuant to the first sentence of this

                                                            Amended and Restated
                                       21               Stock Purchase Agreement
<Page>

     Section 4.4(c). Any Tax Return covering a Straddle Period (a "STRADDLE
     RETURN") shall, insofar as it relates to any member of any Company Group or
     any German Branch, be prepared by the Purchaser on a basis consistent with
     the last previous such return filed, except as required by changes in law.
     Straddle Returns shall be subject to the pre-filing review procedure
     described in Section 4.4(e). The Purchaser shall not, and shall not permit
     any member of any Company Group to, file any amended Tax Return in respect
     of any member of any Company Group or any German Branch that relates to any
     taxable period ending on or prior to the Closing Date or file any amended
     Straddle Return without the consent of the applicable Seller which consent,
     in the case of a Straddle Return, shall not be unreasonably withheld.

          (d)  REFUNDS. The Sellers shall be entitled to retain, or receive
     immediate payment from any member of any Company Group or the Purchaser of,
     an amount equal to any refund for Taxes that were paid with respect to a
     period or portion thereof ending on or prior to the Closing Date
     (including, without limitation, refunds arising by reason of amended
     returns filed after the Closing Date) plus any interest thereon received
     with respect thereto from the applicable taxing authority relating to any
     member of any Company Group or any German Branch. In addition, if as a
     result of an adjustment on audit by a taxing authority or as a result of an
     administrative or judicial proceeding for periods or portions thereof
     ending on or prior to the Closing Date of any member of any Company Group
     or any German Branch, expenses which had been deducted are required to be
     capitalized, or deductions or credits that had been deducted or claimed on
     a Tax Return are required to be deferred to any period or partial period
     ending after the Closing Date, and in connection with such audit or
     administrative or judicial proceeding an amount is payable by a Seller
     pursuant to Section 4.4(a), the amount of such payment shall be reduced by
     any reduction of Taxes as a result of such audit or administrative or
     judicial proceeding (assuming all other items of deduction then available
     are realized first) with respect to the assets or business of any member of
     any Company Group or any German Branch for any period or partial period
     ending after the Closing Date("REDUCED TAXES"); PROVIDED, that if any such
     Reduced Taxes arise after the date on which payment is made by a Seller
     pursuant to Section 4.4(a), the applicable Company or the Purchaser shall
     pay over an amount equal to such Reduced Taxes promptly after such
     reduction in Taxes occurs. In the case of any refund received by, or
     Reduced Taxes realized by, a Company listed on Exhibit B-1 or any of such
     Company's Subsidiaries or Thermometrics Beijing, the refund or Reduced
     Taxes payable to the Sellers or the reduction to the amount payable by the
     Sellers in the case of Reduced Taxes shall be such amount multiplied by the
     Applicable Percentage and shall be paid by the Purchaser. Any dispute with
     respect to refunds or Reduced Taxes shall be resolved by the Third Party
     Accountants, and any such determination by the Third Party Accountants
     shall be final. The Purchaser and the Sellers agree to

                                                            Amended and Restated
                                       22               Stock Purchase Agreement
<Page>

     cooperate, and the Purchaser agrees to cause each Company Group member and
     its other Affiliates to cooperate with the Sellers, with respect to
     claiming any refund or realizing the benefit of any Reduced Taxes referred
     to in this Section 4.4(d), including notifying the Sellers or the
     Purchaser, as the case may be, of the existence of any facts that would
     constitute a reasonable basis for claiming such a refund or Reduced Taxes,
     providing all relevant information available to the Sellers or the
     Purchaser (through any member of any Company Group or otherwise), as the
     case may be, with respect to any such claim, filing and diligently pursuing
     such claim (including by litigation, if appropriate) and, in the case of
     the party filing such a claim, consulting with the other party prior to
     agreeing to any disposition of such claim, provided that the Sellers shall
     not be obligated by the terms of this Section 4.4(d) to amend any Tax
     Return previously filed in order to claim a refund attributable to the
     carryback of a loss or credit incurred by any member of any Company Group
     in a taxable period after the Closing Date.

          (e)  COOPERATION. The Sellers and the Purchaser will, and will cause
     their respective Affiliates to, provide each other with such cooperation
     and information in their possession or to which they have reasonable access
     as either of them reasonably may request of the other in filing any return,
     amended return or claim for refund, determining a liability for Taxes or a
     right to a refund of Taxes, or participating in or conducting an audit or
     other proceeding in respect of Taxes. Without limiting the generality of
     the foregoing, the Purchaser shall, or shall cause each Company Group
     member to, use its reasonable best efforts accurately and timely to
     complete any tax information package or questionnaire that is customary and
     consistent with past practice submitted to it by any of the Sellers for the
     purpose of enabling such Seller to complete any Tax Return that such Seller
     is required to prepare pursuant to this Agreement. Each of the Purchaser
     and the Sellers shall retain all returns, schedules and work papers,
     records and other documents in its possession relating to Tax matters of
     any of the Company Group members or any German Branch for each taxable
     period first ending after the Closing Date and for all prior taxable
     periods until the later of (i) the expiration of the statute of limitations
     of the taxable periods to which - such returns and other documents relate,
     without regard to extension except to the extent notified by the other
     party in writing of such extensions for the respective Tax periods or (ii)
     six years following the due date (without extension) for such returns.
     After the Closing Date each Tax Return and report prepared or caused to be
     prepared by the Purchaser or any member of any Company Group with respect
     to any member of a Company Group or any German Branch which relates to any
     period that includes days on or before the Closing Date shall be subject to
     pre-filing review by the Sellers and, in the event of any disagreement
     between the Purchaser or any member of any Company Group, on the one hand,
     and any of the Sellers, on the other hand, such disagreement shall be
     resolved by the Third

                                                            Amended and Restated
                                       23               Stock Purchase Agreement
<Page>

     Party Accountants, and any such determination by the Third Party
     Accountants shall be final. The fees and expenses of the Third Party
     Accountants for services performed under this Section 4.4 shall be borne
     50% by the Purchaser and 50% by the Sellers. Unless otherwise agreed to by
     the parties, Tax Returns and reports subject to such pre-filing review plus
     a statement, in reasonable detail, showing the calculation supporting the
     Purchaser's determination with regard to the allocation of any Taxes
     reportable on any such Tax Return, shall be submitted by the Purchaser or
     any member of any Company Group to the Sellers at least 45 days prior to
     the due date (including extensions) of such return or report and the
     Sellers shall either complete their review or provide written comments on
     such return or report within 15 days of receipt of such return or report.

          (f)  AUDITS. Each of the Purchaser and the Sellers shall promptly
     notify the other in writing within ten days from its receipt of notice of
     (i) any pending or threatened U.S. federal, state or local or non-U.S. tax
     audits, inquiries or assessments of any member of any Company Group or any
     German Branch, so long as any taxable periods of such member of a Company
     Group or such German Branch ending on or prior to the Closing Date remain
     open, and (ii) any pending or threatened U.S. federal, state or local or
     non-U.S. tax audits, inquiries or assessments of the Purchaser or any of
     the Sellers which may affect the tax liabilities of any member of any
     Company Group or any German Branch for taxable periods ending on or prior
     to the Closing Date. The Sellers shall have the right to control the
     conduct and disposition of any tax audit, inquiry or administrative or
     court proceeding relating to any member of any Company Group or any German
     Branch for taxable periods ending on or prior to the Closing Date and to
     employ counsel of its choice at its expense and the Purchaser shall have
     the right to consult with the Seller during such proceedings at its own
     expense, provided that the Sellers shall not dispose of any such proceeding
     in a manner that would purport to bind the Purchaser or any member of any
     Company Group for taxable periods ending after the Closing Date without the
     prior written consent of the Purchaser, which consent shall not be
     unreasonably withheld. With respect to any tax audit, inquiry or
     administrative or court proceeding relating to any Straddle Return, such
     audit, inquiry or proceeding shall be controlled by the Purchaser, provided
     that the Purchaser shall (x) afford the Sellers and their tax advisers a
     reasonable opportunity to participate in the conduct of any administrative
     or judicial proceeding regarding or arising out of any audits, inquiries or
     assessments, including, without limitation, the right to participate in
     conferences with taxing authorities and to submit pertinent material in
     support of the Sellers' position, and (y) not accept any proposed
     adjustment or enter into any settlement or agreement in compromise which
     would result in a claim for indemnification against the Sellers pursuant
     to this Agreement without the prior written consent of the Sellers, which
     consent shall not be unreasonably withheld. The Purchaser agrees that it
     shall cooperate fully, and shall cause each member of

                                                            Amended and Restated
                                       24               Stock Purchase Agreement
<Page>

     a Company Group to cooperate fully, with the Sellers and their counsel in
     the defense against or compromise of any claim in any proceeding controlled
     by the Sellers pursuant to this Section 4.4(f).

          (g)  CONDUCT OF BUSINESS. On the Closing Date, as to matters which
     could affect the Tax Returns of any member of any Company Group or any
     German Branch with respect to periods ending on or prior to the Closing
     Date, the Purchaser shall cause such Company Group member or German Branch
     to carry on its business only in the ordinary course in substantially the
     same manner as heretofore conducted, except as may be expressly required by
     applicable law or expressly required or expressly permitted by this
     Agreement.

          (h)  PAYMENT OF TRANSACTION-RELATED TAXES AND FEES. All transfer,
     sales, use and similar taxes and fees (including but not limited to
     notarial fees) arising out of the sale of the Shares, the Designated
     Receivables and the German Assets pursuant to this Agreement or any
     Additional Transfer Agreement shall be paid (or caused to be paid) by the
     Purchaser.

          (i)  TERMINATION OF TAX SHARING AGREEMENTS. Prior to the Closing, the
     Sellers shall terminate any Tax allocation, sharing, indemnification or
     similar agreement to which any of the Sellers, on the one hand, and any
     member of any Company Group or any German Branch, on the other hand, is a
     party.

          (j)  LIMITS ON INDEMNITY. No claim for indemnification pursuant to
     this Section 4.4 may be made after the 60th day following the expiration of
     the applicable statutes of limitations with respect to the tax liabilities
     in question, giving effect to any extension thereof. The Sellers'
     indemnification obligation under Section 4.4(a)(ii) shall be limited to the
     portion of the Purchase Price allocated on Exhibit C to the member of the
     Company Group whose liability for Taxes gives rise to such obligation, or
     if such member is not separately identified on Exhibit C, the portion of
     the Purchase Price allocated to such member as agreed to by the parties or
     the Third Party Accountants (if the parties cannot mutually agree).

          (k)  In the event of a conflict between Article 7 and this
     Section 4.4, this Section 4.4 shall be controlling with respect to Damages
     or claims relating to Taxes.

          4.5  NOTIFICATIONS; SUPPLEMENTS TO DISCLOSURES.

          (a)  From the date hereof to the Closing Date, the Sellers shall
     promptly notify the Purchaser in writing of (i) any representation or
     warranty made by them contained in this Agreement or any Additional
     Transfer Agreement becoming

                                                            Amended and Restated
                                       25               Stock Purchase Agreement
<Page>

     untrue or inaccurate in any material respect or (ii) the failure by any
     Seller, any member of the Company Groups or the German Branches to comply
     with or satisfy in any material respect any covenant, condition or
     agreement to be complied with or satisfied by any of them under this
     Agreement or any Additional Transfer Agreement prior to the Closing, and
     such notice will be deemed to amend or supplement the Schedules. For
     purposes of determining the fulfillment of the condition precedent set
     forth in Section 6.4.1, no such amendment or supplement shall be given
     effect; for all other purposes, including, without limitation, Section
     7.2.1, each such amendment and supplement shall be given effect.

          (b)  From the date hereof to the Closing Date, the Purchaser shall
     promptly notify the Sellers in writing of (i) any representation or
     warranty made by it contained in this Agreement or any Additional Transfer
     Agreement becoming untrue or inaccurate in any material respect or (ii) the
     failure by the Purchaser to comply with or satisfy in any material respect
     any covenant, condition or agreement to be complied with or satisfied by
     such party under this Agreement or any Additional Transfer Agreement prior
     to the Closing. For purposes of determining the fulfillment of the
     condition precedent set forth in Section 6.3.1, no such amendment or
     supplement shall be given effect; for all other purposes, including,
     without limitation, Section 7.2.2, each such amendment and supplement shall
     be given effect.

          4.6  CONTACT WITH CUSTOMERS AND SUPPLIERS. None of the Purchaser or
     any of its agents, Affiliates, employees, directors or officers shall
     contact or communicate with any employees, customers, suppliers or
     licensors of any member of any Company Group or any German Branch in
     connection with the transactions contemplated hereby except with the prior
     written consent of Spirent plc, which consent may be conditioned upon the
     presence of an officer of one of the Sellers at any such meeting or
     conference, among other reasonable conditions as may be required by Spirent
     plc.

          4.7  PUBLICITY. No press release or public announcement related to
this Agreement or any Additional Transfer Agreement, or the transactions
contemplated hereby or thereby, shall be issued or made without the joint
approval of Spirent plc and the Purchaser, unless required by law (in the
reasonable opinion of counsel) or London Stock Exchange Limited, the United
Kingdom Panel on Mergers and Acquisitions or New York Stock Exchange rule, in
which case Spirent plc and the Purchaser shall use reasonable efforts to give
the other the opportunity to review such press release or announcement prior to
publication and, where practicable, agree to the form and wording of such
release or announcement.

          4.8  INTERCOMPANY ACCOUNTS. All intercompany accounts between any
member of any Company Group or any German Branch, on the one hand, and any
Seller

                                                            Amended and Restated
                                       26               Stock Purchase Agreement
<Page>

or Non-Company Affiliate, on the other hand, shall be repaid, capitalized or
otherwise eliminated, in the manner indicated on Schedule 4.8 or another manner
that does not adversely affect the Purchaser, as of the close of business on the
business day immediately preceding the Closing Date, except (i) as set forth on
Schedule 4.8, (ii) for Designated Receivables and (iii) for trade payables and
receivables arising in the ordinary course of business.

          4.9  INDEMNIFICATION OF DIRECTORS AND OFFICERS. Following the Closing,
the Purchaser shall cause each Company Group to honor its obligations, if any,
to indemnify and advance defense costs to each present and former officer or
director of such Company Group pursuant to their respective by-laws (or
equivalent Organizational Document) and shall not permit the Organizational
Documents of any Company Group to be amended for a period of seven years in a
manner which adversely affects the indemnification rights, if any, of present
and former directors and officers of such Company Group, except as required by
applicable law. Each of the Sellers covenants for itself and its respective
successors and assigns that it shall not institute, or cause to be instituted,
any action or proceeding in any court or before any administrative agency or
before any tribunal against any of such present and former directors and
officers, in their capacity as such, with respect to any claims, liabilities,
actions or causes of action arising from actions occurring prior to the Closing,
other than any such actions arising in connection with the negotiation or
consummation of the transactions contemplated by this Agreement, the Additional
Transfer Agreements and the Ancillary Agreements.

          4.10 NON-COMPETITION.

          (a)  Prior to the second anniversary of the Closing Date, the Sellers
     shall not, and shall cause their Affiliates not to, directly or indirectly,
     own, manage, operate, or control any Person that provides temperature,
     humidity, pressure and gas sensors substantially similar to the products of
     such types currently provided by the Company Groups or the German Branches
     in the markets currently served by the Company Groups and the German
     Branches; PROVIDED that this Section 4.10 shall not prevent any of the
     Sellers or any of their respective Affiliates from (i) engaging in any
     business activity in which such Seller or Affiliate is engaged as of the
     date hereof; (ii) owning, solely as an investment, publicly-traded company
     securities so long as such Seller or Affiliate does not own or control, in
     the aggregate, more than 10% of any class of such securities; or (iii)
     acquiring or holding any interest in, or managing, operating or
     controlling, any Person that provides temperature, humidity, pressure and
     gas sensors substantially similar to the products of such types currently
     provided by the Company Groups or the German Branches in the markets
     currently served by the Company Groups and the German Branches if less than
     20% of the total revenues of such Person in the 12 months prior to such
     acquisition, or the commencement of the management, operation or control of
     such Person by any such Seller or Affiliate, arose out of or

                                                            Amended and Restated
                                       27               Stock Purchase Agreement
<Page>

     were related to the provision of products and subsystems that sense
     temperature, humidity and pressure.

          (b) Prior to the second anniversary of the Closing Date, the Sellers
     shall not, and shall cause their Affiliates not to, (i) induce any employee
     of any member of a Company Group or any German Branch to leave such member
     of a Company Group or such German Branch or to accept any other employment
     or position, or (ii) assist any other entity in hiring any such employee.

          4.11 INSURANCE. The Sellers shall use commercially reasonable efforts
to keep, or cause to be kept, all insurance policies applicable to the Business
of the Company Groups and the German Branches currently in effect in full force
and effect through the close of business on the Closing Date.

          4.12 KOREAN JOINT VENTURES. As promptly as practicable after the date
hereof, the Purchaser shall execute and deliver written undertakings whereby it
agrees to be bound, subject to the consummation of the transaction contemplated
under this Agreement, by all of the terms and conditions of (a) the Joint
Venture Agreement, dated as of August 11, 1999, between Spirent B.V. (f/k/a
Bowthorpe - B.V.) and Partsnic Company Limited (f/k/a Daewoo Electronic
Components Company Limited) and (b) the Joint Venture Agreement, dated as - of
October 19, 2000, between Spirent B.V. and LG Electronics Inc., which
undertakings shall in each case be in form and substance reasonably satisfactory
to Partsnic Company Limited or LG Electronic Inc., as the case may be.

          4.13 GERMAN ASSETS; TAUNTON LEASE. At the Closing, (i) the Purchaser
and Spirent GmbH shall execute and deliver the German Asset Purchase Agreement
and the Dutch Asset Purchase Agreement and consummate the sale and purchase of
the German Assets; and (ii) Spirent plc shall, and shall cause Spirent
Components Limited to, execute and deliver an assignment and assumption
agreement whereby Spirent plc assigns, and Spirent Components Limited assumes,
the Lease, dated as of March 8, 1982 (the "TAUNTON LEASE"), between Spirent plc
and Crown Estate Commissioners relating to the property located at Crown
Industrial Estate (Site C), Priorswood Road, Taunton, UK, and Spirent plc and
Spirent Components Limited shall consummate such assignment and assumption; and
the Purchaser shall execute and deliver a guarantee of the lessee's obligations
under the Taunton Lease or provide such other assurances as Crown Estate
Commissioners may reasonably require for the complete and unconditional release
of Spirent plc and Spirent Components Limited from all obligations in connection
with the Taunton Lease.

          4.14 LOCAL PURCHASE AGREEMENTS. If reasonably requested by the Sellers
or the Purchaser, the Purchaser and the Sellers shall enter into a separate,
additional stock purchase agreement (each, a "LOCAL PURCHASE AGREEMENT") with
respect to the sale and

                                                            Amended and Restated
                                       28               Stock Purchase Agreement
<Page>

purchase of the Shares of any Company organized in a non-U.S. jurisdiction,
PROVIDED that no such agreement shall contain any (i) representations and
warranties, covenants or conditions that are not also contained, in
substantially similar form, in this Agreement or (ii) provisions inconsistent
with the provisions of this Agreement.

          4.15 BANK ACCOUNTS. The Sellers shall, to the extent reasonably
practicable on or prior to the Closing Date, cause the Companies or their
Subsidiaries to withdraw and distribute to the Sellers, or apply to the payment
of indebtedness of such Companies or their Subsidiaries, by way of dividend or
otherwise, all cash in the bank accounts listed on Schedule 2.17.

          4.16 CHANGE OF NAME; DISCONTINUANCE OF USE OF "SPIRENT". Within
fifteen days following the Closing Date, the Purchaser shall change the names of
Spirent Korea Ltd., Spirent Components Limited and Spirent Sensing Inc. to
eliminate the word "Spirent" from such names and shall submit to the appropriate
governmental authorities or offices in complete and correct form all of the
filings required to reflect such changes in name. Within thirty days following
the Closing Date, the Purchaser shall cease using any stationery, signage,
equipment, invoices, receipts, forms, packaging, advertising and promotional
materials, product, training and service literature and materials, software or
other materials using the designation "Spirent" or any other designation
indicating an affiliation with any Seller or any Non-Company Affiliate.

          4.17 TRANSITIONAL SERVICES. Following the Closing Date, the Sellers
shall provide to the Company Groups and the German Branches the transitional
services specified in Schedule 4.17, on the terms specified in such Schedule.

          5.   EMPLOYEES AND EMPLOYEE BENEFIT PLANS.

          5.1  CONTINUATION OF BENEFITS.

          (a)  Each employee of any member of the Company Group and each former
     employee of any member of the Company Group entitled to any compensation,
     benefits or other payments arising in connection with such former
     employee's employment with any member of any Company Group shall be
     referred to as a "COMPANY EMPLOYEE." The term "Company Employee" shall also
     be deemed to include (i) any employee of the German Branches and (ii) the
     Sellers' employees listed on Schedule 5.1, each of whom devotes at least a
     majority of his or her working time to the performance of services for any
     member of any Company Group or any German Branch. As of the Closing Date,
     the Sellers shall terminate the employment of each of the Company Employees
     described in the preceding sentence who remain employed by the Sellers
     immediately prior to the Closing Date, and the Purchaser shall offer
     employment to all such employees and assume all employment agreements and
     severance

                                                            Amended and Restated
                                       29               Stock Purchase Agreement
<Page>

     liabilities in connection with such employees. Concurrently therewith, the
     Sellers shall assign to the Purchaser the employment agreements and
     severance liabilities in connection with such employees.

          (b)  From and for one year after the Closing, the Purchaser will, or
     will cause any Company or one of its Subsidiaries or the Purchaser's
     Subsidiaries, as applicable, to continue to provide each Company Employee
     with a salary or wage level and bonus opportunity, to the extent
     applicable, at least equal to that in effect on the Closing Date and with
     employee benefits and other terms and conditions of employment that are, in
     the aggregate, comparable to the benefits and terms and conditions provided
     to each such Company Employee by the Sellers, any Company or any of its
     Subsidiaries, as applicable, on the Closing with length of service with
     such Company or Subsidiary, up to the Closing Date, to be recognized by the
     Purchaser for all purposes, including, without limitation, for the purposes
     of the Purchaser's benefit plans (other than accrual of benefits). From and
     after the Closing, the Purchaser shall, or shall cause any Company or one
     of its Subsidiaries or one of the Purchaser's Subsidiaries, as applicable,
     to honor, pay, perform, and satisfy any and all liabilities, obligations
     and responsibilities to or in respect of each Company Employee arising
     under the terms of or in connection with any Plan, employment agreement and
     collective bargaining agreement maintained by any member of the Company
     Groups or otherwise assigned to the Purchaser as in effect immediately
     prior to the Closing. Nothing in this Section 5.1 shall preclude the
     Purchaser from, at any time following the Closing, terminating the
     employment of any Company Employee; PROVIDED that if such termination
     occurs prior to one year following the Closing Date and such termination is
     not for cause, any such terminated Company Employee receives severance and
     other termination benefits upon or in connection with such termination in
     an amount which is at least equal to the severance and other termination
     benefits which would have been provided to such Company Employee if his or
     her employment had been terminated for the same reason immediately prior to
     the Closing, all of which benefits are described on Schedules 2.10(a) and
     2.10(b).

          5.2  401(k) PLAN. As soon as practicable after the Closing Date,
Company Employees who were participants in the 401(k) Retirement and Profit
Sharing Plan for the Employees of the U.S. Affiliates of Spirent plc (the
"SELLER 401(k) PLAN") and who are actively employed on the Closing Date shall
commence participation in a tax-deferred savings plan maintained by the
Purchaser (the "PURCHASER 401(k) PLAN"). As soon as practicable following the
later of (i) the expiration of a 30-day period following the date of filing of
any required notices with the IRS by both the Sellers and the Purchaser and (ii)
delivery to the Sellers of a favorable determination letter from the IRS
regarding the qualified status of the Purchaser 401(k) Plan, the Sellers shall
cause the transfer from the Seller 401(k) Plan to the Purchaser 401(k) Plan of
the value of the full account balances

                                                            Amended and Restated
                                       30               Stock Purchase Agreement
<Page>

of such employees in cash on the date of transfer (which account balances will
have been credited with appropriate earnings attributable to the period from the
Closing Date to the date of transfer described herein); PROVIDED that to the
extent that any loan had been extended to any such Company Employee participants
under the Seller 401(k) Plan prior to the Closing Date, such loans and any
promissory notes or other documents evidencing such loans shall be transferred
to the Purchaser 401(k) Plan and shall be valued based on the outstanding
principal and interest due thereunder. The Sellers and the Purchaser shall
cooperate to the extent necessary and reasonable to facilitate such transfer and
loan payments. From and after such transfer from the Seller 401(k) Plan to
Purchaser 401(k) Plan in accordance with the provisions of this Section 5.2, the
Purchaser 401(k) Plan shall be solely responsible for the provision of all
benefits to the Company Employees previously provided under the Seller 401(k)
Plan. Prior to the plan-to-plan transfer, the Sellers shall make all matching
contributions with respect to such employees that are required to be made on
account of any period prior to the Closing Date.

          5.3  UK PENSION SCHEMES. The Sellers and the Purchaser agree to comply
with the agreements relating to the transfer of United Kingdom employee benefits
plans set forth on Exhibit E hereto.

          5.4  SELLER RETAINED LIABILITIES. The Sellers shall retain all
liabilities related to equity based awards granted to employees of the Company
Groups under any of the Sellers' equity based compensation plans.

          6.   CONDITIONS PRECEDENT.

          6.1  GENERAL. The respective obligations set forth herein of the
Sellers and the Purchaser to consummate the sale and purchase of the Shares and
the Designated Receivables at the Closing shall be subject to the fulfillment,
on or before the Closing Date, in the case of the Sellers, of the conditions set
forth in Sections 6.2 and 6.3, and in the case of the Purchaser, of the
conditions set forth in Sections 6.2 and 6.4.

          6.2  CONDITIONS TO OBLIGATIONS OF BOTH PARTIES.

          6.2.1 HSR ACT, ETC. To the extent notifications or applications are
required to be filed under the HSR Act, the waiting period under the HSR Act
shall have been terminated or expired. The notifications or applications that
are required to be filed prior to the Closing under the antitrust, competition
or comparable laws of any non-U.S. jurisdiction and that are listed on Schedule
3.2(b) shall have been filed. The consents or approvals of any governmental
authority that are required to be obtained prior to the Closing under the
antitrust, competition or comparable laws of any non-U.S. jurisdiction and that
are listed and marked with an asterisk on Schedule 3.2(b) shall have been
obtained.

                                                            Amended and Restated
                                       31               Stock Purchase Agreement
<Page>

          6.2.2 CONSENTS. All governmental and third party consents listed on
Schedule 6.2.2 shall have been obtained.

          6.2.3 NO INJUNCTION. There shall not be in effect any injunction or
other order issued by a court of competent jurisdiction, U.S. or non-U.S.,
restraining or prohibiting the consummation of the transactions contemplated by
this Agreement.

          6.2.4 ALL SHARES PURCHASED AND SOLD. Except as provided in Section
1.4, the Purchaser shall be purchasing and the Sellers shall be selling all of
the Shares and the Designated Receivables at the Closing.

          6.2.5 GERMAN ASSET SALE. The transactions contemplated by the German
Asset Purchase Agreement and the Dutch Asset Purchase Agreement shall have been
consummated in accordance with the terms and conditions specified therein.

          6.3  CONDITIONS TO OBLIGATIONS OF THE SELLERS.

          6.3.1 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER. The
representations and warranties in Section 3 shall be true and correct when made
and at and as of the Closing Date with the same effect as though made at and as
of such time, with such exceptions as are not in the aggregate material. The
Purchaser shall have duly performed and complied in all material respects with
all agreements contained herein required to be performed or complied with by it
at or before the Closing.

          6.3.2 OFFICER'S CERTIFICATE. The Purchaser shall have delivered to the
Sellers a certificate, dated the Closing Date and signed by an authorized senior
officer, as to the fulfillment of the conditions set forth in Section 6.3.1.

          6.3.3 RELEASES OF GUARANTIES AND BONDS. The relevant Sellers and
Non-Company Affiliates shall have been completely and unconditionally released
from any and all obligations in connection with the Guaranties and Bonds listed
on Schedule 4.1.

          6.4  CONDITIONS TO OBLIGATIONS OF THE PURCHASER.

          6.4.1 REPRESENTATIONS AND WARRANTIES OF THE SELLER. The
representations and warranties in Section 2 shall be true and correct when made
and at and as of the Closing Date with the same effect as though made at and as
of such time, ignoring for this purpose all qualifications as to knowledge,
materiality or Material Adverse Effect in such representations and warranties
(other than with respect to Section 2.15(y)), except for any and all failures of
such representations and warranties to be correct in all respects as of the
Closing Date (with all such failures considered in the aggregate) as would not
have a Material Adverse Effect. Each Seller shall have duly performed and
complied in

                                                            Amended and Restated
                                       32               Stock Purchase Agreement
<Page>

all material respects with all agreements contained herein required to be
performed or complied with by it at or before the Closing.

          6.4.2 OFFICER'S CERTIFICATE. The Sellers shall have delivered to the
Purchaser a certificate, dated the Closing Date and signed by an authorized
senior officer of each Seller, as to the fulfillment of the conditions set forth
in Section 6.4.1.

          6.4.3 RESIGNATIONS. The directors and officers of the Companies or
their Subsidiaries, as the case may be, who have been specified in a notice
delivered by the Purchaser to Spirent plc at least ten days prior to the Closing
shall have submitted their resignations from the Boards of Directors of such
Companies or such Subsidiaries and as officers of such Companies or such
Subsidiaries, as the case may be, effective as of the Closing Date, in each case
without liability to any member of any Company Group.

          6.4.4 TAX CERTIFICATE. Spirent International shall have delivered to
the Purchaser the certificate described in Treasury Regulation Section
1.1445-2(b)(2)(i) to the effect that it is not a foreign person within the
meaning of Section 1445 of the Code.

          6.4.5 DISCHARGE OF CERTAIN OBLIGATIONS. All of the obligations of any
member of any Company Group to satisfy overdrafts on the accounts listed in
Schedule 2.17 shall have been paid or discharged in full.

          7.   INDEMNIFICATION.

          7.1  SURVIVAL OF REPRESENTATIONS AND WARRANTIES.

          (a)  The representations and warranties made by the Sellers and the
     Purchaser in this Agreement shall survive the Closing and expire upon the
     first anniversary of the Closing Date, except that the representations and
     warranties made in or pursuant to Sections 2.1, 2.4, 2.5(b), 3.1 and 3.5
     shall survive the Closing without limitation.

          (b)  Any claim for indemnification under this Section 7 with respect
     to such representations and warranties must be brought in accordance with
     Section 7.2.3 prior to the expiration of the applicable representation and
     warranty pursuant to Section 7.1(a).

          7.2  INDEMNIFICATION.

          7.2.1 BY THE SELLERS. From and after the Closing, the Sellers, jointly
and severally, agree to indemnify and hold harmless the Purchaser, each
Affiliate of the Purchaser (other than the Companies and their Subsidiaries) and
each director, officer and employee of the Purchaser or any of its Affiliates
(collectively, the "PURCHASER INDEMNITEES") from and against any loss,
liability, damage (exclusive of any

                                                           Amended and Restated
                                       33               Stock Purchase Agreement
<Page>

consequential, indirect, speculative or punitive damages) or cost, including
reasonable attorneys' fees and other costs and expenses (collectively,
"DAMAGES"), incurred or sustained by the Purchaser Indemnitees as a result of
the breach by the Sellers of any covenant set forth in this Agreement or,
subject to Section 7.1, any representation or warranty set forth in this
Agreement, other than any Damages relating to Taxes which shall be governed
exclusively by Section 4.4, PROVIDED that there shall not be any duplicative
payments or indemnities by the Sellers.

     The rights of the Purchaser Indemnitees to indemnification under this
Section 7 shall be limited as follows:

          (a)  The amount of any Damages incurred or sustained by the Purchaser
     Indemnitees shall be reduced by the net amount of any Tax benefits actually
     realized by the Purchaser or any of its Affiliates by reason of such
     Damages in the year such Damages were incurred or sustained or any prior
     year or any of the succeeding five years following the year the Damages
     were incurred or sustained (assuming all other items of deduction of the
     Purchaser or such Affiliate then available to the Purchaser or such
     Affiliate are realized first). If any such Tax benefit is realized after
     the date payment is made by a Seller pursuant to Section 7.2.1, the
     Purchaser Indemnitees shall pay over an amount equal to such Tax benefit
     promptly after such Tax benefit is realized.

          (b)  The amount of any Damages incurred or sustained by the Purchaser
     Indemnitees shall be reduced by the net amount the Purchaser Indemnitees
     recover (after deducting all attorneys' fees, expenses and other costs of
     recovery) from any insurer or other party liable for such Damages, and the
     Purchaser, on behalf of the Purchaser Indemnitees, shall use reasonable
     efforts to effect any such recovery.

          (c)  The Purchaser Indemnitees shall be entitled to indemnification
     under this Section 7 for breaches of representations and warranties (i)
     with respect to any individual claim or group of related claims, only if
     the amount of Damages (reduced as provided in paragraphs (a), (b) and (e)
     of this Section 7.2.1) exceeds US$15,000 and (ii) with respect to all
     claims, only to the extent that the aggregate amount of Damages for such
     claims (reduced as provided in paragraphs (a), (b) and (e) of this Section
     7.2.1) exceeds 3% of the Purchase Price (as adjusted) and then only for the
     amount of such excess. In no event shall the Purchaser Indemnitees be
     entitled to indemnification exceeding 10% of the Purchase Price (as
     adjusted) in the aggregate.

          (d)  The Purchaser Indemnitees shall not be entitled to make a claim
     for indemnification under this Section 7 for any breach by any Seller of
     any covenant,

                                                           Amended and Restated
                                       34               Stock Purchase Agreement
<Page>

     representation or warranty set forth in this Agreement if the Purchaser had
     actual knowledge of such breach prior to the Closing.

          (e)  The parties acknowledge that, pursuant to this Agreement, the
     Purchaser will acquire the respective Applicable Percentages of the total
     equity interests in each Company listed on Exhibit B-1 and a 90% equity
     interest in Thermometrics Beijing. The Sellers' obligation to indemnify the
     Purchaser Indemnitees for Damages incurred or sustained by them in
     connection with any Company listed on Exhibit B-1 or Thermometrics Beijing
     shall be limited to an amount equal to the product of the amount of Damages
     (reduced as provided in paragraphs (a) and (b) above) incurred or sustained
     by such entity multiplied by the Applicable Percentage in respect of such
     entity.

          7.2.2 BY THE PURCHASER. From and after the Closing, the Purchaser
agrees to indemnify and hold harmless the Sellers, each Non-Company Affiliate
and each director, officer or employee of any of the foregoing (collectively,
the "SELLER INDEMNITEES") from and against any Damages incurred or sustained by
the Seller Indemnitees as a result of or arising out of or under (i) the breach
by the Purchaser of any covenant, representation or warranty set forth in this
Agreement, (ii) the German Liabilities, (iii) the operation by the Purchaser of
the Business of the German Branches or the Purchaser's ownership, operation or
use of the German Assets following the Closing Date, (iv) the Taunton Lease, (v)
the employment, employment agreements and severance liabilities relating to the
employees of the German Branches and the employees listed on Schedule 5.1, and
(vi) any of the Guaranties and Bonds, PROVIDED that the Seller Indemnitees shall
not be entitled to indemnification pursuant to the foregoing clauses (ii) - (v)
in respect of any Damages to the extent the Purchaser is entitled to
indemnification therefor pursuant to Section 7.2.1, and PROVIDED, FURTHER, that
there shall not be any duplicative payments or indemnities by the Purchaser.

     The rights of the Seller Indemnitees to indemnification under this Section
7 shall be limited as follows:

          (a)  The amount of any Damages incurred by the Seller Indemnitees
     shall be reduced by the net amount of the Tax benefits actually realized by
     the Sellers or any of their Affiliates by reason of such Damages in the
     year such Damages were incurred or sustained or any prior year or any of
     the succeeding five years following the year such Damages were incurred or
     sustained (assuming all other items of deduction of the Sellers or such
     Affiliate then available to the Purchaser or such Affiliate are realized
     first). If any such Tax benefit is realized after the date payment is made
     by the Purchaser pursuant to Section 7.2.2, the Seller Indemnitees shall
     pay over an amount equal to such Tax benefit promptly after such Tax
     benefit is realized.

                                                           Amended and Restated
                                       35               Stock Purchase Agreement
<Page>

          (b)  The amount of any Damages incurred by the Seller Indemnitees
     shall be reduced by the net amount the Seller Indemnitees recover (after
     deducting all attorneys' fees, expenses and other costs of recovery) from
     any insurer or other party liable for such Damages, and the Sellers, on
     behalf of the Seller Indemnitees, shall use reasonable efforts to effect
     any such recovery.

          (c)  The Seller Indemnitees shall be entitled to indemnification under
     this Section 7 for breaches of representations and warranties (i) with
     respect to any individual claim or group of related claims, only if the
     amount of Damages (reduced as provided in paragraphs (a), (b) and (d) of
     this Section 7.2.2) exceeds US$15,000 and (ii) with respect to all claims,
     only to the extent that the aggregate amount of Damages for such claims
     (reduced as provided in paragraphs (a), (b) and (d) of this Section 7.2.2)
     exceeds 3% of the Purchase Price (as adjusted) and then only for the amount
     of such excess. In no event shall the Seller Indemnitees be entitled to
     indemnification exceeding 10% of the Purchase Price (as adjusted) in the
     aggregate.

          (d)  The Seller Indemnitees shall not be entitled to make a claim for
     indemnification under this Section 7 for any breach by the Purchaser of any
     covenant, representation or warranty set forth in this Agreement if the
     Sellers had actual knowledge of such breach prior to the Closing.

          7.2.3 INDEMNIFICATION PROCEDURES. A party entitled to indemnification
under Section 7 shall herein be referred to as an "INDEMNITEE." A party
obligated to indemnify an Indemnitee under Section 7 shall herein be referred to
as an "INDEMNITOR."

          (a)  THIRD PARTY CLAIMS. Within ten business days after an Indemnitee
     receives notice of any third party claim or the commencement of any action
     by any third party which such Indemnitee reasonably believes may give rise
     to a claim for indemnification from an Indemnitor hereunder, such
     Indemnitee shall, if a claim in respect thereof is to be made against an
     Indemnitor under Section 7, notify such Indemnitor in writing in reasonable
     detail of such claim or action and include with such notice copies of all
     notices and documents (including court papers) served on or received by the
     Indemnitee from such third party. Upon receipt of such notice, the
     Indemnitor shall be entitled to participate in such claim or action, to
     assume the defense thereof with counsel reasonably satisfactory to the
     Indemnitee, and to settle or compromise such claim or action, PROVIDED that
     if the Indemnitee has elected to be represented by separate counsel
     pursuant to the proviso to the following sentence, such settlement or
     compromise shall be effected only with the consent of the Indemnitee, which
     consent shall not be unreasonably withheld or delayed. After notice to the
     Indemnitee of the Indemnitor's election to assume the defense of such claim
     or action, the Indemnitor shall not be liable to the Indemnitee under
     Section 7 for any legal or

                                                           Amended and Restated
                                       36               Stock Purchase Agreement
<Page>

     other expenses subsequently incurred by the Indemnitee in connection with
     the defense thereof other than reasonable costs of investigation, PROVIDED
     that the Indemnitee shall have the right to employ counsel to represent it
     if either (x) such claim or action involves remedies other than monetary
     damages and such remedies, in the Indemnitee's reasonable judgment, could
     have a material adverse effect on such Indemnitee or (y) the Indemnitee may
     have available to it one or more defenses or counterclaims which are
     inconsistent with one or more defenses or counterclaims which may be
     alleged by the Indemnitor, and in any such event the fees and expenses of
     such separate counsel shall be paid by the Indemnitee. If the Indemnitor
     does not elect to assume the defense of such claim or action within 45 days
     of the Indemnitee's delivery of notice of such a claim or action, the
     Indemnitee shall be entitled to assume the defense thereof. Unless it has
     been conclusively determined through a final judicial determination (or
     settlement tantamount thereto) that the Indemnitor is not liable to the
     Indemnitee under this Section 7.2.3, the Indemnitee shall act reasonably
     and in accordance with its good faith business judgment with respect to
     such defense, and shall not settle or compromise any such claim or action
     without the consent of the Indemnitor, which consent shall not be
     unreasonably withheld or delayed. The parties hereto agree to render to one
     another such assistance as may reasonably be requested in order to insure
     the proper and adequate defense of any such claim or action, including
     making employees available on a mutually convenient basis to provide
     additional information and explanation of any relevant materials or to
     testify at any proceedings relating to such claim or action.

          (b)  OTHER CLAIMS. Within ten business days after an Indemnitee
     sustains any Damages not involving a third party claim or action which such
     Indemnitee reasonably believes may give rise to a claim for indemnification
     from an Indemnitor hereunder, such Indemnitee shall deliver notice of such
     claim to the Indemnitor, specifying with reasonable detail the basis on
     which indemnification is being asserted and the amount of such Damages.

          7.2.4 EXCLUSIVITY OF INDEMNIFICATION PROVISION. Except as otherwise
expressly set forth in this Agreement, the indemnities provided for in this
Section 7 (including without limitation the survival periods contained in
Section 7.1 and the limitations on indemnification contained in this Section
7.2) shall be the sole and exclusive remedy for monetary damages of the parties
hereto after the Closing for any inaccuracy of any representation or warranty
contained in this Agreement, any failure or breach of any covenant, obligation,
condition or agreement contained in this Agreement or any Additional Transfer
Agreement or any loss, liability, damage or cost arising or incurred in
connection with or as a result of the negotiation, execution, delivery or
consummation of the transactions contemplated by this Agreement and the
Additional Transfer Agreements or arising out or resulting from the ownership of
the Company Groups by the Purchaser. The indemnification provisions contained in
this Agreement

                                                           Amended and Restated
                                       37               Stock Purchase Agreement
<Page>

shall supersede any indemnification obligations set forth in any Additional
Transfer Agreement.

          7.2.5 RECOVERIES. If at any time subsequent to the receipt by an
Indemnitee of an indemnity payment under this Section 7, such Indemnitee (or any
Affiliate thereof) receives any recovery, settlement or other similar payment (a
"RECOVERY") with respect to the Damages for which it received such indemnity
payment, such Indemnitee shall promptly pay to the Indemnitor an amount equal to
the amount of such Recovery, less any expense incurred by such Indemnitee (or
its Affiliates) in connection with such Recovery, but in no event shall any such
payment exceed the amount of such indemnity payment.

          8.   [Reserved.]

          9.   GENERAL PROVISIONS.

          9.1  MODIFICATION; WAIVER. This Agreement may be modified only by a
written instrument executed by the parties hereto. Any of the terms and
conditions of this Agreement may be waived in writing at any time on or prior to
the Closing Date by the party or parties entitled to the benefits thereof.

          9.2  ENTIRE AGREEMENT. This Agreement, including the Schedules hereto
(which are hereby incorporated by reference and made a part hereof), the
Additional Transfer Agreements and the Ancillary Agreements constitute the
entire agreement of the parties with respect to the subject matter hereof and
supersede all other prior agreements, understandings, documents, projections,
financial data, statements, representations and warranties, oral or written,
express or implied, between the parties hereto and their respective Affiliates,
representatives and agents in respect of the subject matter hereof, except that
none of this Agreement, the Additional Transfer Agreements or the Ancillary
Agreements supersedes the Confidentiality Agreement, the terms and conditions of
which the parties hereto expressly reaffirm.

          9.3  CERTAIN LIMITATIONS. It is the explicit intent and understanding
of each of the parties hereto that no party nor any party's Affiliates,
representatives or agents is making any representation or warranty whatsoever in
connection with the transactions contemplated hereby and by the Additional
Transfer Agreements, oral or written, express or implied, other than those set
forth in Sections 2 and 3 of this Agreement and neither the Sellers, on the one
hand, nor the Purchaser, on the other hand, are relying on any other statement,
representation or warranty, oral or written, express or implied, made by the
other parties or such other parties' Affiliates, representatives or agents,
including, without limitation, any such statement, representation or warranty
contained in any offering memorandum or any information, document or material
made available to the Purchaser or its Affiliates, representatives or agents in
certain "data rooms", management

                                                           Amended and Restated
                                       38               Stock Purchase Agreement
<Page>

presentations or any other form in expectation of the transactions contemplated
by this Agreement and the Additional Transfer Agreements, except for the
representations and warranties set forth in such Sections 2 and 3. EXCEPT AS
OTHERWISE SPECIFICALLY SET FORTH IN THIS AGREEMENT, THE PARTIES EXPRESSLY
DISCLAIM ANY IMPLIED WARRANTY OR REPRESENTATION. The parties agree that this is
an arm's length transaction in which the parties' undertakings and obligations
are limited to the performance of their obligations under this Agreement, the
Additional Transfer Agreements and the Ancillary Agreements. The Purchaser
acknowledges that it is a sophisticated investor, that it has undertaken a full
investigation of the Business of the Company Groups and the German Branches, and
that it has only a contractual relationship with the Sellers, based solely on
the terms of this Agreement, and that there is no special relationship of trust
or reliance between any of them and any Seller.

          9.4  TERMINATION.

          (a)  This Agreement may be terminated: (i) at any time prior to the
     Closing Date by mutual consent of the Purchaser and Spirent plc, or (ii) by
     the Purchaser or Spirent plc, if the Closing shall not have taken place on
     or before the date that is 120 days following the date hereof, or such
     later date as the parties may have agreed to in writing, PROVIDED that the
     non-occurrence of the Closing is not attributable to a breach of the terms
     hereof by the party seeking termination, or (iii) by either the Purchaser
     or Spirent plc by written notice to the other party if any event, fact or
     condition shall occur or exist that shall have made it impossible to
     satisfy a condition precedent to the terminating party's obligations
     (including any Seller's obligations, if Spirent plc is the terminating
     party) to consummate the transactions contemplated by this Agreement, and
     such event, fact or condition shall not have been cured within thirty days
     after the non-terminating party is made aware of such event, fact or
     condition, unless the occurrence or existence of such event, fact or
     condition shall be due to the failure of the terminating party to perform
     or comply with any of the agreements or covenants hereof to be performed or
     complied with by such party prior to the Closing.

          (b)  In the event of termination by Spirent plc or the Purchaser
     pursuant to this Section 9.4, written notice thereof shall forthwith be
     given to the other party and the transactions contemplated by this
     Agreement shall be terminated without further action by either party. If
     the transactions contemplated by this Agreement are terminated as provided
     herein:

               (i) the Purchaser shall return to the Sellers all documents and
          other materials received from the Sellers and their respective
          Affiliates and agents relating to the transactions contemplated
          hereby, whether obtained before or after the execution hereof, and all
          copies of such documents and other materials; and the Purchaser shall
          return to the Sellers or destroy all

                                                           Amended and Restated
                                       39               Stock Purchase Agreement
<Page>

          materials developed by the Purchaser or any of its Affiliates or
          agents from any such documents or other materials; and

               (ii) all confidential information received by the Purchaser with
          respect to the Sellers and their respective Affiliates shall be
          treated in accordance with the terms of the Confidentiality Agreement,
          which shall remain in full force and effect notwithstanding the
          termination of this Agreement.

          (c)  If this Agreement is terminated as provided in this Section 9.4,
     this Agreement and each Additional Transfer Agreement shall immediately
     become null and void and of no further force or effect without any further
     action by any of the parties hereto or thereto, except that the
     Confidentiality Agreement, Section 4.7 hereof relating to publicity, and
     Section 9.5 relating to certain expenses shall survive the termination of
     this Agreement. Nothing in this Section 9.4 shall be deemed to release any
     party from any liability for any breach by such party of the terms and
     provisions of this Agreement or to impair the right of any party to compel
     specific performance by any other party of its obligations under this
     Agreement.

          9.5  EXPENSES. Except as expressly provided herein, whether or not the
transactions contemplated herein shall be consummated, each party shall pay its
own expenses incident to the preparation and performance of this Agreement and
the Additional Transfer Agreements; PROVIDED that the Purchaser shall be
responsible for all filing fees in connection with the filings required by the
HSR Act.

          9.6  FURTHER ACTIONS. Each party shall execute and deliver such
certificates and other documents and take such other actions as may reasonably
be requested by the other party in order to consummate or implement the
transactions contemplated hereby.

          9.7  POST-CLOSING ACCESS. In connection with any matter relating to
any period prior to, or any period ending on, the Closing, the Purchaser shall,
upon the request and at the expense of the Sellers, permit any Seller and its
representatives full access at all reasonable times to the books, records and
personnel of the Companies and their Subsidiaries, and the Purchaser shall
execute (and shall cause the Companies or their successors and their respective
Subsidiaries to execute) such documents as such Seller may reasonably request to
enable such Seller to file any required reports relating to the Companies or any
of their Subsidiaries, to defend any litigation involving such Seller or any
Non-Company Affiliate or otherwise for a valid business purpose (in each case,
other than in respect of Taxes, which shall be governed by Section 4.4);
provided that the Sellers and any of their representatives adhere to whatever
procedures the Purchaser reasonably requests to safeguard confidential,
non-public or privileged information relating to the Purchaser, its Affiliates
or any member of the Company Groups or German

                                                           Amended and Restated
                                       40               Stock Purchase Agreement
<Page>

Branches. The Purchaser shall not dispose of such books and records during the
seven-year period beginning with the Closing Date without the Sellers' consent,
which shall not be unreasonably withheld. Following the expiration of such
seven-year period, the Purchaser may dispose of such books and records at any
time upon giving 60 days' prior written notice to the Sellers, unless a Seller
agrees to take possession of such books and records within 60 days from the date
of delivery of such notice at no expense to the Purchaser.

          9.8  NOTICES. All notices, requests, demands and other communications
hereunder shall be in writing and shall be deemed to have been duly given or
made as follows: (a) if sent by registered or certified mail in the United
States return receipt requested, upon receipt; (b) if sent by reputable
overnight air courier (such as DHL or Federal Express), two business days after
mailing; (c) if sent by facsimile transmission, with a copy mailed on the same
day in the manner provided in (a) or (b) above, when transmitted and receipt is
confirmed by telephone; or (d) if otherwise actually personally delivered, when
delivered and shall be delivered as follows:

               if to any of the Sellers, to such Seller:

                       c/o Spirent plc
                       Spirent House
                       Crawley Business Quarter
                       Fleming Way
                       Crawley, West Sussex RH10 2QL
                       Facsimile: 44 1293 76 7677
                       Attention: General Counsel

               with a copy to:

                       Debevoise & Plimpton
                       919 Third Avenue
                       New York, New York 10022
                       Facsimile: (212) 909-6836
                       Attention: Robert F. Quaintance, Jr.

               if to the Purchaser:

                       General Electric Company
                       41 Woodford Avenue
                       Plainville, Connecticut 06062
                       Facsimile: (860) 747-7079
                       Attention: Senior Counsel, Transactions

                                                        Amended and Restated
                                    41               Stock Purchase Agreement
<Page>

               with a copy to:

                       King & Spalding
                       1185 Avenue of the Americas
                       New York, New York 10036-4003
                       Faxsimile: (212) 556-2222
                       Attention: E. William Bates, II, Esq.

or to such other address or to such other Person as any party hereto shall have
last designated by notice to the other parties.

          9.9  ASSIGNMENT. This Agreement shall be binding upon and inure to the
benefit of the parties hereto and their respective successors and assigns,
PROVIDED that any assignment, by operation of law or otherwise, by any party
hereto shall require the prior written consent of the other parties and any
purported assignment or other transfer without such consent shall be void and
unenforceable; and PROVIDED FURTHER, however, that the Purchaser may assign or
transfer this Agreement in whole or in part to any of its Affiliates without
such consent, PROVIDED that the Purchaser shall remain, and all such assignees
and transferees shall be, jointly and severally liable for the obligations of
the Purchaser under this Agreement.

          9.10 NO THIRD PARTY BENEFICIARIES. Except as provided in Sections 4.9,
5 and 7, nothing in this Agreement shall confer any rights upon any Person which
is not a party or a successor or permitted assignee of a party to this
Agreement.

          9.11 COUNTERPARTS. This Agreement may be executed in counterparts,
each of which together shall constitute one and the same instrument.

          9.12 INTERPRETATION; DISCLOSURE SCHEDULES.

          (a)  The section headings in this Agreement are for convenience of
     reference only and shall not be deemed to alter or affect the meaning or
     interpretation of any provision hereof.

          (b)  The disclosure of any matter in any Schedule shall be deemed to
     be a disclosure for all purposes of this Agreement to which the relevance
     of such matter is reasonably apparent. Because of the different
     jurisdictions in which the Companies, their Subsidiaries and the German
     Branches are located and because of the different management teams having
     day-to-day responsibility for the operations of the Companies, their
     Subsidiaries and the German Branches, information contained in the
     Schedules was collected and is organized in separate sets, as indicated in
     the Table of Contents included in the Schedules. References in this
     Agreement to a particular Schedule (such as "Schedule 2.1") shall be deemed
     to refer collectively to all of the Schedules so designated. The fact that
     a

                                                           Amended and Restated
                                       42               Stock Purchase Agreement
<Page>

     particular group of Companies, Subsidiaries of Companies or German Branches
     is referred to in a set of Schedules shall not be deemed to limit the
     disclosures contained in such set of Schedules to such Companies,
     Subsidiaries or German Branches.

          Although the Sellers have endeavored to prepare the Schedules in a
     consistent manner, some of the Schedules differ in format or style
     according to local practice in the jurisdictions where particular
     Companies, their Subsidiaries or German Branches are located. The
     disclosure of any matter in any Schedule shall expressly not be deemed to
     constitute an admission by the Sellers, or to otherwise imply, that any
     such matter is material for the purposes of this Agreement or that any
     other Schedule (or set of Schedules) is incomplete by virtue of the
     omission of such disclosure. Except for information that is required by
     this Agreement to be included in the Schedules, the failure of any
     information contained in the Schedules to be true and correct shall not
     constitute a breach of any representation or warranty or other provision
     contained in this Agreement and the Sellers shall have no liability for
     such failure.

          (c)  In addition to the particular items set forth in the Schedules,
     the contents of this Agreement, each Additional Transfer Agreement and all
     transactions referred to herein or therein are disclosed or deemed
     disclosed to the Purchaser.

          9.13 GOVERNING LAW. This Agreement shall be construed, performed and
enforced in accordance with the laws of the State of New York, without regard to
the conflicts of law principles of such state.

          9.14 CONSENT TO JURISDICTION, ETC.

          (a)  Each of the parties hereto hereby irrevocably and unconditionally
     submits, for itself and its property, to the exclusive jurisdiction of any
     New York State court or federal court of the United States of America
     sitting in New York City, and any appellate court from any thereof, in any
     action or proceeding arising out of or relating to this Agreement, the
     Additional Transfer Agreements or the transactions contemplated hereby or
     thereby or for recognition or enforcement of any judgment relating thereto;
     and each of the parties hereto hereby irrevocably and unconditionally
     agrees that all claims in respect of any such action or proceeding may be
     heard and determined in such New York State court or, to the extent
     permitted by law, in such federal court. Each of the parties hereto agrees
     that a final judgment in any such action or proceeding shall be conclusive
     and may be enforced in other jurisdictions by suit on the judgment or in
     any other manner provided by law.

                                                           Amended and Restated
                                       43               Stock Purchase Agreement
<Page>

          (b)  Each of the parties hereto hereby irrevocably and unconditionally
     waives, to the fullest extent it may legally and effectively do so, any
     objection which it may now or hereafter have to the laying of venue of any
     suit, action or proceeding arising out of or relating to this Agreement,
     the Additional Transfer Agreements or the transactions contemplated hereby
     or thereby in any New York State or federal court. Each of the parties
     hereto hereby irrevocably waives, to the fullest extent permitted by law,
     the defense of an inconvenient forum to the maintenance of such action or
     proceeding in any such court.

          (c)  Each party to this Agreement irrevocably consents to service of
     process in the manner provided for notices in Section 9.8. Nothing in this
     Agreement will affect the right of any party to this Agreement to serve
     process in any other manner permitted by law.

          9.15 TAX TREATMENT OF INDEMNITY PAYMENTS. Each Seller, on the one
hand, and the Purchaser, on the other hand, agree (i) to treat any payment
pursuant to Section 1.4 and any indemnity payment made pursuant to Section 4.4
or Section 7.2 as an adjustment to the Purchase Price for all Tax purposes
unless otherwise required by law and (ii) to allocate the Purchase Price among
the Shares of each Company, the Designated Receivables and the German Assets as
set forth on Exhibit C, as the same may have been amended pursuant to Section
1.4 and modified pursuant to clause (i) of this Section 9.15, for all Tax
purposes unless otherwise required by law.

          9.16 WAIVER OF PUNITIVE AND OTHER DAMAGES AND JURY TRIAL.

          (a)  THE PARTIES TO THIS AGREEMENT EXPRESSLY WAIVE AND FOREGO ANY
     RIGHT TO RECOVER PUNITIVE, EXEMPLARY, LOST PROFITS, CONSEQUENTIAL OR
     SIMILAR DAMAGES IN ANY ARBITRATION, LAWSUIT, LITIGATION OR PROCEEDING
     ARISING OUT OF OR RESULTING FROM ANY CONTROVERSY OR CLAIM ARISING OUT OF OR
     RELATING TO THIS AGREEMENT, THE ADDITIONAL TRANSFER AGREEMENTS OR THE
     TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

          (b)  EACH PARTY ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY
     ARISE UNDER THIS AGREEMENT OR ANY ADDITIONAL TRANSFER AGREEMENT IS LIKELY
     TO INVOLVE COMPLICATED AND DIFFICULT ISSUES, AND THEREFORE IT HEREBY
     IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY
     JURY IN RESPECT OF ANY LITIGATION DIRECTLY OR INDIRECTLY ARISING OUT OF OR
     RELATING TO THIS AGREEMENT, THE ADDITIONAL TRANSFER AGREEMENTS OR THE
     TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

                                                            Amended and Restated
                                       44               Stock Purchase Agreement
<Page>

          (c)  EACH PARTY CERTIFIES AND ACKNOWLEDGES THAT (i) NO REPRESENTATIVE,
     AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR
     OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION,
     SEEK TO ENFORCE EITHER OF THE FOREGOING WAIVERS, (ii) IT UNDERSTANDS AND
     HAS CONSIDERED THE IMPLICATIONS OF SUCH WAIVERS, (iii) IT MAKES SUCH
     WAIVERS VOLUNTARILY, AND (iv) IT HAS BEEN INDUCED TO ENTER INTO THIS
     AGREEMENT AND ANY ADDITIONAL TRANSFER AGREEMENT BY, AMONG OTHER THINGS, THE
     MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION 9.16.

          9.17 CERTAIN DEFINITIONS. The following terms used herein shall have
the following meanings:

          (a)  "AFFILIATE" means, with respect to any specified Person, a Person
     that directly, or indirectly through one or more intermediaries, controls,
     or is controlled by, or is under common control with, the Person specified;

          (b)  "ANCILLARY AGREEMENTS" means any and all agreements, other than
     this Agreement and the Additional Transfer Agreements, entered into among
     the Sellers and the Purchaser in connection with the transactions
     contemplated hereby.

          (c)  "APPLICABLE PERCENTAGE" means, (i) with respect to any Company
     listed on Exhibit B-1, the percentage amount listed opposite such Company's
     name on Exhibit B-1, and (ii) with respect to Thermometrics Beijing, 90%.

          (d)  "BOND" means any letter of credit, surety, performance, customs
     or excise bond obtained prior to the Closing Date by a Seller or a
     Non-Company Affiliate to support or facilitate business transactions by a
     member of a Company Group or a German Branch, and any security furnished by
     a Seller, a member of a Company Group or a Non-Company Affiliate in
     connection therewith.

          (e)  "BUSINESS" means, with respect to any Company Group, member of a
     Company Group or German Branch, the business or operations of such Company
     Group, member of a Company Group or German Branch, as currently conducted
     by such Company Group or member thereof or German Branch.

          (f)  "BUSINESS DAY" means a day other than a Saturday, Sunday or other
     day on which commercial banks in New York, New York are authorized or
     required by law to close.

          (g)  "COMPANY GROUP" means any Company and its Subsidiaries. "Company
     Groups" means the Companies and their Subsidiaries.

                                                            Amended and Restated
                                        45              Stock Purchase Agreement
<Page>

          (h)  "CONTROL" (including the correlative terms "controlling,"
     "controlled by" and "UNDER COMMON CONTROL WITH") means the possession,
     direct or indirect, of the power to direct or cause the direction of the
     management and policies of a Person, whether through the ownership of
     voting equity interest, by contract or otherwise.

          (i)  "DUTCH ASSET PURCHASE AGREEMENT" means the asset purchase
     agreement, in the form to be reasonably agreed upon by the Purchaser and
     the Sellers, entered into as of the Closing Date between Spirent GmbH and
     the Purchaser (or its designated Subsidiary), whereby Spirent GmbH sells,
     and the Purchaser (or such designated Subsidiary) purchases, certain of the
     German Assets on the terms and conditions specified therein.

          (j)  "ENVIRONMENTAL LAW" means any law, common law, statute, rule,
     regulation, directive or order relating to (i) the manufacture, transport,
     use, treatment, recycling, storage, disposal, release or threatened release
     of Hazardous Substances, or (ii) the protection of human health or the
     environment (including, without limitation, natural resources, air, and
     surface or subsurface land or waters).

          (k)  "GERMAN ASSET PURCHASE AGREEMENT" means the asset purchase
     agreement, substantially in the form of Exhibit F hereto, entered into as
     of the Closing Date between Spirent GmbH and the Purchaser (or its
     designated Subsidiary), whereby Spirent GmbH sells, and the Purchaser (or
     such designated Subsidiary) purchases, certain of the German Assets on the
     terms and conditions specified therein.

          (l)  "GERMAN BRANCH" means any of the divisions of Spirent GmbH known
     as Thermometrics Germany, GEI Germany and Protimeter Germany.

          (m)  "GERMAN LIABILITIES" means the liabilities assumed by the
     Purchaser (or its designated Subsidiary) pursuant to the German Asset
     Purchase Agreement.

          (n)  "GUARANTY" means any guaranty, keepwell agreement, comfort letter
     or similar undertaking issued prior to the Closing Date by a Seller or a
     Non-Company Affiliate to support or facilitate business transactions by a
     member of a Company Group or a German Branch, and any security furnished by
     a Seller or a Non-Company Affiliate in connection therewith.

          (o)  "HAZARDOUS SUBSTANCE" means any material or substance that is:
     (i) listed, classified or regulated as a "hazardous waste," "hazardous
     substance," "toxic substance," pollutant or contaminant pursuant to any
     applicable Environmental Law, (ii) that is toxic, explosive, corrosive,
     flammable, infectious,

                                                            Amended and Restated
                                       46               Stock Purchase Agreement
<Page>

     radioactive, carcinogenic, mutagenic or otherwise hazardous and is
     regulated by any governmental authority or (iii) any petroleum product or
     by-product, asbestos or polychlorinated biphenyls.

          (p)  "KNOWLEDGE" means, with respect to any Seller and any member of
     any Company Group, the actual knowledge of any of the individuals listed on
     Schedule 9.17(p)(i), opposite the name of such member, obtained in the
     normal course of their respective duties as officers of a Seller or a
     Company; and with respect to the Purchaser, the actual knowledge of any of
     the individuals listed on Schedule 9.17(p)(ii);

          (q)  "ORGANIZATIONAL DOCUMENTS" means any applicable certificates or
     articles of incorporation, association or limited partnership, memoranda of
     association, by-laws and other organizational documents, and any amendments
     or restatements thereto or thereof.

          (r)  "PERSON" means an individual, corporation, partnership,
     association, joint-stock company, trust, unincorporated organization or
     government or political subdivision thereof; and

          (s)  "SUBSIDIARY" means, with respect to any Person, a corporation or
     other Person in which the first Person owns or controls, directly or
     indirectly, capital stock or other equity interests representing more than
     50% of the outstanding voting stock or other equity interests.

          (t)  "THIRD PARTY ACCOUNTANTS" means an internationally recognized
     accounting firm selected by mutual agreement by Spirent plc and the
     Purchaser.

          (u)  "U. S. COMBINED INCOME TAXES," as such term is used in the Offer
     Statement, means U.S. federal income taxes and California state unitary
     income taxes.

                                                            Amended and Restated
                                       47               Stock Purchase Agreement
<Page>

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

                                       SELLERS:

                                       SPIRENT PLC

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

                                       SPIRENT B.V.

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

                                       SPIRENT INTERNATIONAL INC.

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

                                       SPIRENT GMBH

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

                                                            Amended and Restated
                                                        Stock Purchase Agreement

<Page>

                                        PURCHASER:

                                        GENERAL ELECTRIC COMPANY

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

                                                            Amended and Restated
                                                        Stock Purchase Agreement

<Page>

                               AMENDMENT NO. 1 TO
                  AMENDED AND RESTATED STOCK PURCHASE AGREEMENT

     This AMENDMENT NO. 1 TO AMENDED AND RESTATED STOCK PURCHASE AGREEMENT,
dated as of November 9, 2001, by and among Spirent plc, a company formed under
the laws of England and Wales, Spirent B.V., a Netherlands corporation, Spirent
International Inc., a Delaware corporation, and Spirent GmbH, a German
corporation (collectively, the "SELLERS"), and General Electric Company, a New
York corporation (the "PURCHASER"), amends the Amended and Restated Stock
Purchase Agreement, dated as of September 10, 2001 (the "PURCHASE AGREEMENT"),
by and among each of the Sellers and the Purchaser.

                               W I T N E S S E T H

          WHEREAS, the Sellers and the Purchaser desire to amend certain
provisions of the Purchase Agreement to be effective as of September 7, 2001;

     NOW, THEREFORE, for good and valuable consideration the receipt and
sufficiency of which is hereby acknowledged, the Sellers and the Purchaser do
hereby agree as follows:

     Section 1. AMENDMENTS.

     1.1. NOTIFICATIONS. Section 4.5 of the Purchase Agreement is hereby amended
to read in its entirety as follows:

          (a)   From the date hereof to the Closing Date, the Sellers shall
     promptly notify the Purchaser in writing of (i) any representation or
     warranty made by them contained in this Agreement or any Additional
     Transfer Agreement becoming untrue or inaccurate in any material respect or
     (ii) the failure by any Seller, any member of the Company Groups or the
     German Branches to comply with or satisfy in any material respect any
     covenant, condition or agreement to be complied with or satisfied by any of
     them under this Agreement or any Additional Transfer Agreement prior to the
     Closing.

          (b)   From the date hereof to the Closing Date, the Purchaser shall
     promptly notify the Sellers in writing of (i) any representation or
     warranty made by it contained in this Agreement or any Additional Transfer
     Agreement becoming untrue or inaccurate in any material respect or (ii) the
     failure by the Purchaser to comply with or satisfy in any material respect
     any covenant, condition or agreement to be complied with or satisfied by
     such party under this Agreement or any Additional Transfer Agreement prior
     to the Closing.

                                        1
<Page>

     1.2. INDEMNIFICATION BY THE SELLERS.

          (a)   Section 7.2.1(d) of the Purchase Agreement is hereby amended to
read in its entirety as follows:

          (d)   The Purchaser Indemnitees shall not be entitled to make a claim
          for indemnification under this Section 7 for any breach by any Seller
          of any covenant, representation or warranty set forth in this
          Agreement if the Purchaser had actual knowledge of such breach, or of
          the facts or circumstances giving rise to such breach, prior to the
          date of this Agreement. The Purchaser shall be entitled to make a
          claim for a breach of a covenant, representation or warranty set forth
          in this Agreement if the Purchaser first obtained knowledge of such
          breach, or of the facts or circumstances giving rise to such breach,
          after the date of this Agreement. The covenants, representations and
          warranties of the Sellers contained in this Agreement will not be
          deemed to be waived or otherwise modified or affected by any
          investigation made by the Purchaser on or following the date of this
          Agreement.

          (b)   Section 7.2.1 of the Purchase Agreement is hereby amended to add
the following text after subsection (e) of Section 7.2.1:

                (f)  In the event that the Purchaser believes that there is or
          may have been a breach of any of the representations set forth in
          Section 2.16 for which any Purchaser Indemnitee may seek
          indemnification hereunder ("ENVIRONMENTAL ISSUES"),

                     (i)   The Purchaser shall provide to the Sellers prompt
                notice of any Environmental Issues upon the determination by
                Purchaser that such Environmental Issues are reasonably likely
                to exist. The Purchaser and the Sellers will participate jointly
                in all communications, discussions and negotiations with any
                environmental regulatory authority with jurisdiction over the
                matter that is the subject of such Environmental Issue and with
                any landlord or other interested party concerning such matter,
                and neither the Purchaser nor any Seller may conduct any such
                communications, discussions or negotiations without the
                participation or prior written consent of the other party. The
                Purchaser and the Sellers shall provide each other with copies
                of all correspondence to or from any environmental regulatory
                authority, landlord or other interested party concerning
                investigation, monitoring or remediation activities relating to
                any Environmental Issue as well as copies of any and all
                remediation action plans, closure plans or similar plans.

                                        2
<Page>

                     (ii)  The Sellers and their consultants shall be permitted
                to discuss with the Purchaser and its environmental consultants
                (and the Purchaser shall provide the Sellers access to the
                Purchaser's environmental consultants with respect to) matters
                relating to any Environmental Issues so as to become informed
                concerning all maters related to such Environmental Issues and
                all procedures, methods, tests and approaches to be utilized in
                connection therewith. The Purchaser shall promptly provide to
                the Sellers copies of all reports prepared by Purchaser's
                environmental consultants regarding Environmental Issues.

                     (iii) Any investigation, monitoring and remediation of any
                environmental condition relating to an Environmental Issue shall
                be controlled by the Purchaser, PROVIDED that the Purchaser
                shall be solely responsible for the consequences of such
                activities. The Purchaser shall consult with and keep the
                Sellers informed regarding such investigation, monitoring and
                remediation activities. The Sellers shall be granted reasonable
                access to the site of any such environmental condition during
                normal business hours or at such other times as may be agreed
                upon by the Purchaser and the Sellers.

                     (iv)  If the Purchaser and the Sellers do not agree with
                respect to any proposed communications, discussions or
                negotiations with any environmental regulatory authority,
                landlord or other interested party, or with respect to any
                proposed investigation, monitoring or remediation of any
                environmental condition, the Purchaser will make the final
                decision and will retain ultimate control regarding any such
                communications, discussions, negotiations, investigation,
                monitoring and remediation, PROVIDED THAT, where the Purchaser
                pursues a course of action with which the Seller does not agree,
                any indemnity to which the Purchaser Indemnitees may be entitled
                under this Section 7.2.1 in respect of such environmental
                condition shall not cover any portion of the Purchaser
                Indemnitees' Damages that exceed the Damages that the Purchaser
                Indemnitees would have incurred or sustained had they had
                followed a commercially reasonable course of action required to
                comply with applicable law.

     1.3. INDEMNIFICATION BY THE PURCHASER. Section 7.2.2(d) of the Purchase
Agreement is hereby amended to read in its entirety as follows:

          (d)   The Seller Indemnitees shall not be entitled to make a claim for
     indemnification under this Section 7 for any breach by the Purchaser of any
     covenant, representation or warranty set forth in this Agreement if the
     Sellers had actual knowledge of such breach, or of the facts or
     circumstances giving rise to

                                        3
<Page>

     such breach, prior to the date of this Agreement. The Sellers shall be
     entitled to make a claim for a breach of a covenant, representation or
     warranty set forth in this Agreement if the Sellers first obtained
     knowledge of such breach, or of the facts or circumstances giving rise to
     such breach, after the date of this Agreement. The covenants,
     representations and warranties of the Purchaser contained in this Agreement
     will not be deemed to be waived or otherwise modified or affected by any
     investigation made by the Sellers on or following the date of this
     Agreement.

     Section 2. MISCELLANEOUS

     2.1. COUNTERPARTS. This Amendment may be executed in counterparts, each of
which together shall constitute one and the same instrument.

     2.2. RATIFICATION AND CONFIRMATION. Except as expressly amended hereby, the
terms of the Purchase Agreement are hereby ratified and confirmed and shall
remain in full force and effect.

     2.3. GOVERNING LAW. This Amendment shall be construed, performed and
enforced in accordance with the laws of the State of New York, without regard to
the conflicts of law principles of such state.

                                        4
<Page>

     IN WITNESS WHEREOF, the parties have duly executed this Amendment No. 1 to
Amended and Restated Stock Purchase Agreement as of the date first above
written.

                                       SELLERS:

                                       SPIRENT PLC

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

                                       SPIRENT B.V.

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

                                       SPIRENT INTERNATIONAL INC.

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

                                       SPIRENT GMBH

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

                                       PURCHASER:

                                       GENERAL ELECTRIC COMPANY

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

                                        5<Page>

                                                                    EXHIBIT 4.12

                       STOCK AND ASSET PURCHASE AGREEMENT

     STOCK AND ASSET PURCHASE AGREEMENT (together with the Schedules and
Appendices hereto, the "AGREEMENT"), dated as of February 19, 2002, by and among
Curtiss-Wright Flight Systems, Inc., a Delaware corporation (together with its
permitted assigns, the "PURCHASER"); and Spirent International Incorporated, a
Delaware corporation ("SII"); Autronics Corporation, a Delaware corporation
("AUTRONICS US"); Spirent plc, a company formed under the laws of England and
Wales ("SPIRENT PLC"); Penny & Giles International plc, a company formed under
the laws of England and Wales ("P&G PLC"); and Spirent GmbH, a German company
("SPIRENT GMBH"). SII, Autronics US, Spirent plc, P&G plc, and Spirent GmbH are
sometimes referred to herein collectively as the "SELLERS" and individually as a
"SELLER."

                              W I T N E S S E T H:

     WHEREAS, SII is the owner of all of the issued and outstanding shares (the
"US SHARES") of the capital stock of Penny & Giles Controls, Inc., a Rhode
Island corporation ("P&G CONTROLS US"); and

     WHEREAS, Autronics US owns or otherwise holds or has rights in certain
assets described on Appendix A-1 hereto and defined therein as the "US Assets"
(the "US ASSETS"), is the obligor of certain liabilities described on Appendix
A-1 hereto and defined therein as the "US Liabilities" (the "US LIABILITIES"),
and operates the US Business; and

     WHEREAS, Spirent plc is the owner of all of the entire issued share capital
(the "SPIRENT UK SHARES") of Penny & Giles Controls Limited, a company formed
under the laws of England and Wales ("P&G CONTROLS UK"); and

     WHEREAS, P&G plc is the owner of all of the entire issued share capital
(the "P&G UK SHARES") of Penny & Giles Aerospace Limited, a company formed under
the laws of England and Wales ("P&G AEROSPACE UK"); and

     WHEREAS, P&G plc owns or otherwise holds or has rights in certain assets
described on Appendix A-2 hereto and defined therein as the "UK Assets" (the "UK
ASSETS") and is the obligor of certain liabilities described on Appendix A-2
hereto and defined therein as the "UK Liabilities" (the "UK LIABILITIES"), and
the UK Business is operated on behalf of P&G plc by P&G Aerospace UK as its
agent pursuant to an agency agreement dated 31 March 1996; and

     WHEREAS, Spirent GmbH owns or otherwise holds or has rights in certain
assets described on Appendix A-3 hereto and defined therein as the "German
Assets" (the "GERMAN ASSETS"), is the obligor of certain liabilities described
on Appendix A-3 hereto and defined therein as the "German Liabilities" (the
"GERMAN LIABILITIES"), and operates the German Business; and

                                       -1-
<Page>

     WHEREAS, the Sellers desire to sell to the Purchaser, and the Purchaser
desires to purchase from the Sellers, all of the US Shares, the Spirent UK
Shares, and the P&G UK Shares (collectively, the "SHARES"), the US Business, the
UK Business, and the German Business, and all the goodwill associated therewith;
all for the consideration and on the terms set forth in this Agreement;

     NOW, THEREFORE, in consideration of the mutual covenants hereinafter set
forth, and for other good and valuable consideration, the receipt and adequacy
of which are hereby acknowledged, the parties hereto agree as follows:

                                   ARTICLE I.

                                Purchase and Sale

     Section 1.1  SALE OF SHARES AND ASSETS. Subject to the terms and conditions
of this Agreement, at the Closing the Sellers will sell, transfer, convey,
assign and set over ("TRANSFER") to the Purchaser, and the Purchaser will
purchase and acquire from the Sellers, all of the Sellers' right, title and
interest in and to the Shares, the US Business, the UK Business and the German
Business.

     Section 1.2  CLOSING OBLIGATIONS.

     A.   SELLER DELIVERIES. At the Closing, the Sellers will deliver to the
Purchaser:

                  (i)    (1) duly executed forms of transfer in respect of, and
                         share certificates for, the US Shares; and (2) duly
                         executed forms of transfer in respect of, and share
                         certificates for, the Spirent UK Shares and the P&G UK
                         Shares; in both cases either duly endorsed in blank for
                         transfer or otherwise in a form transferable by
                         delivery, or accompanied by duly executed stock
                         transfer powers in blank;

                  (ii)   the US Assignment and Assumption Agreement,
                         substantially in the form of Appendix A-1 (the "US
                         BUSINESS TRANSFER AGREEMENT"), executed by Autronics
                         US;

                  (iii)  the UK Asset Purchase Agreement, substantially in the
                         form of Appendix A-2 (the "UK BUSINESS TRANSFER
                         AGREEMENT"), executed by P&G plc;

                  (iv)   the German Asset Purchase Agreement, substantially in
                         the form of Appendix A-3 (the "GERMAN BUSINESS TRANSFER
                         AGREEMENT"), executed by Spirent GmbH;

                                       -2-
<Page>

                  (v)    four transfers whereby Spirent plc assigns and the
                         Purchaser assumes each of the four leases particulars
                         of each of which are set out in the definition of UK
                         Lease Sites and such assignments shall be in the
                         respective forms attached to Appendix B-1, (the "LEASE
                         ASSIGNMENTS"), executed by Spirent plc; and

                  (vi)   the additional agreements, documents, certificates and
                         materials listed on Appendix C-1.

     B.   PURCHASER DELIVERIES. At the Closing, the Purchaser will deliver to
the Sellers:

                  (i)    an aggregate amount of Sixty Million Dollars
                         ($60,000,000) (the "PURCHASE PRICE"), by wire transfer
                         of immediately available funds, to accounts specified
                         by SII for itself and as agent of all of the Sellers
                         pursuant to Section 9.15;

                  (ii)   the US Business Transfer Agreement, executed by the
                         Purchaser;

                  (iii)  the UK Business Transfer Agreement, executed by the
                         Purchaser;

                  (iv)   the German Business Transfer Agreement, executed by the
                         Purchaser;

                  (v)    the Lease Assignments, executed by the Purchaser; and

                  (vi)   the additional agreements, documents, certificates and
                         materials listed on Appendix C-1.

     The stock certificates and stock power and transfer documents described in
Section 1.2(A)(i), the US Business Transfer Agreement, the UK Business Transfer
Agreement and the German Business Transfer Agreement are referred to
collectively as the "ADDITIONAL TRANSFER DOCUMENTS, the Lease Assignments and
the other documents listed in Appendix C-1 are referred to collectively as the
"ANCILLARY AGREEMENTS".

     Section 1.3  POST-CLOSING ADJUSTMENT.

     A.   Within thirty (30) days following the Closing, Sellers shall, at their
own expense, prepare or cause to be prepared, and deliver to Purchaser a balance
sheet (the "CLOSING BALANCE SHEET"), which shall set forth the assets and
liabilities of the Businesses, on a combined basis, as of the Closing Date
calculated in accordance with the Applicable Accounting Standards (as defined
below), and a calculation of the Net Worth of the Businesses as of the Closing
Date ("CLOSING NET WORTH") derived therefrom, each such calculation to be made
in accordance with the standards, principles and methods set forth on SCHEDULE
1.3(A) (the "APPLICABLE ACCOUNTING

                                       -3-
<Page>

STANDARDS"). As used herein "BUSINESS DAY" means any day other than a Saturday,
Sunday or other day on which commercial banks in the City of New York are
authorized by law to close.

     B.   Within ninety (90) days after its receipt of the Closing Balance
Sheet, Purchaser shall cause its accountants to review the Closing Balance Sheet
and the calculation of the Closing Net Worth set forth therein. If Purchaser has
any objection to any such calculations, or to any of the figures shown on the
Closing Balance Sheet, Purchaser shall, within such ninety (90) day period,
inform Sellers in writing thereof (the "PURCHASER'S OBJECTION"), setting forth
in reasonable detail the basis for its objection and the adjustments to the
Closing Net Worth of the Businesses shown in the Closing Balance Sheet which
Purchaser believes should be made, based on the Applicable Accounting Standards.
Sellers shall then have thirty (30) days after their receipt of a Purchaser's
Objection to review and respond to the Purchaser's Objection ("SELLERS' REVIEW
PERIOD"). If Purchaser and Sellers are unable to resolve all of their
disagreements with respect to the determination of the Closing Net Worth of the
Businesses within ten (10) days after the end of the Sellers' Review Period,
they shall refer their remaining disagreements to KPMG (the "ACCOUNTING FIRM"),
who shall determine, on the basis of the standards, principles and methods set
forth on SCHEDULE 1.3(A), and only with respect to the remaining disagreements
submitted to them, whether and to what extent the Closing Net Worth of the
Businesses shown on the Closing Balance Sheet requires adjustment. The Purchaser
and the Sellers shall direct the Accounting Firm to deliver its report and
determination of such adjustments as quickly as reasonably possible. The
Accounting Firm's determination shall be final, conclusive and binding upon
Purchaser and Sellers. The fees and disbursements of the Accounting Firm shall
be shared equally by Purchaser and Sellers. Purchaser and Sellers shall make
readily available to the Accounting Firm all relevant books and records and any
work papers (including those of the parties' respective accountants) relating to
the Financial Statements and the Closing Balance Sheet and all other items
reasonably requested by the Accounting Firm. The "ADJUSTED CLOSING BALANCE
SHEET" shall be (i) the Closing Balance Sheet in the event that (x) no
Purchaser's Objection is delivered to Sellers during the ninety (90) day period
specified above, or (y) Sellers and Purchaser so agree, (ii) the Closing Balance
Sheet, adjusted in accordance with the Purchaser's Objection in the event that
Sellers do not respond to Purchaser's Objection within the Sellers' Review
Period, or (iii) the Closing Balance Sheet, as adjusted by either (x) the
agreement of Sellers and the Purchaser or (y) the Accounting Firm.

     C.   Purchaser shall provide Sellers and their accountants full access to
the books and records of the Businesses, to any other information, including
work papers of its accountants (to the extent available to the Purchaser), and
to any employees to the extent necessary for Sellers to prepare the Closing
Balance Sheet. Purchaser and its accountants shall have full access to all
information used by Sellers in preparing the Closing Balance Sheet, including
the work papers of their accountants (to the extent available to the Sellers).

     D.   Within ten (10) days following issuance of the Adjusted Closing
Balance Sheet, the adjustment payments payable pursuant to this Section 1.3(D)
shall be paid by wire transfer of immediately available funds to a bank account
designated by Purchaser or Sellers, as the case may be. Purchaser or Sellers, as
the case may be, shall make an adjustment payment in an amount equal to the
difference between (x) the Benchmark Net Worth and (y) the Closing Net

                                       -4-
<Page>

Worth as derived from the Adjusted Closing Balance Sheet, as follows: (1) the
adjustment payment will be made by Sellers to Purchaser to the extent that such
Closing Net Worth is less than the Benchmark Net Worth; and the adjustment
payment will be made by Purchaser to Sellers to the extent that such Closing Net
Worth Sheet is greater than the Benchmark Net Worth; plus, in either case,
interest thereon from the Closing Date through the date of payment at the rate
of interest publicly announced by Citibank, N.A. or any successor thereto in New
York, New York from time to time as its "base rate".

     E.   As used herein, the term "BENCHMARK NET WORTH" means the amount equal
to $21,694,000. The parties agree that the Benchmark Net Worth represents the
Net Worth of the Businesses at June 30, 2001, and has been calculated in
accordance with the Applicable Accounting Standards, and the summary of such
calculation is attached hereto as SCHEDULE 1.3(E). As used herein, the term "NET
WORTH" means the aggregate assets of the Businesses, less the Liabilities of the
Businesses, in each case of the types included in the calculation of the
Benchmark Net Worth and calculated in accordance with the Applicable Accounting
Standards consistent with SCHEDULE 1.3(E).

                                   ARTICLE II.

                                     Closing

     Section 2.1  CLOSING DATE. The closing of the transactions contemplated
hereby (the "CLOSING")" will be held at the offices of Goulston & Storrs, P.C.,
Boston, MA, USA on the date which is the later of (a) March 22, 2002 or (b) the
date upon which the closing conditions set forth in Articles VI and VII have
been satisfied or waived; or such other date as the parties may agree in writing
(such date of Closing, the "CLOSING DATE"). The Closing shall be deemed
effective as of 12:01 a.m. Eastern Time on the Closing Date.

     Section 2.2  EFFECT OF CLOSING. All matters at the Closing shall be
considered to take place simultaneously, and no delivery of any document or
instrument shall be deemed complete until all transactions and deliveries of
documents and instruments and payments contemplated by this Agreement are
completed or have been waived by the party to whom delivery or payment was due
hereunder. Upon the Closing, each of the conditions in Article VI and Article
VII shall be deemed to have been satisfied or waived by the respective parties
entitled to waive such conditions.

                                  ARTICLE III.

                  Representations and Warranties by the Sellers

     Section 3.1  REPRESENTATIONS AND WARRANTIES. Each of the Sellers hereby
jointly and severally represents and warrants to the Purchaser that, except as
set forth in the Disclosure Schedule:

                                       -5-
<Page>

     A.   CORPORATE EXISTENCE AND QUALIFICATION OF THE COMPANIES AND THE
SELLERS; DUE EXECUTION, OWNERSHIP OF SHARES, ETC.

          (i)     Each of P&G Controls US, Autronics US and SII is a corporation
duly organized and validly existing under the Laws of the respective states set
forth on SCHEDULE 3.1(A)(i), and each is duly qualified to do business in each
jurisdiction in which the failure to be so qualified would reasonably be
expected to have a Material Adverse Effect. Each of the UK Companies, Spirent
plc and P&G plc is duly incorporated under the laws of England and Wales and is
duly qualified to do business in each jurisdiction in which the failure to be so
qualified would reasonably be expected to have a Material Adverse Effect.
Spirent GmbH is a German corporation duly organized and validly existing under
the laws of Germany and is duly qualified to do business in each jurisdiction in
which the failure to be so qualified would reasonably be expected to have a
Material Adverse Effect. SCHEDULE 3.1(A)(i) sets forth a complete and accurate
list for each Company of its name and capitalization (including the authorized
capital of each Company and the identity of each record holder of equity
securities issued by such Company and the number of shares thereof held by
each).

          As used herein, the term "UK COMPANIES" means, collectively, P&G
Controls UK and P&G Aerospace UK; and the term "UK COMPANY" means each of the
foregoing individually.

          (ii)    Each Company has the requisite corporate power and authority
to own, lease or otherwise hold its Assets and to conduct its Business, and each
Seller has the requisite corporate power and authority to own, lease or
otherwise hold its assets and to conduct its business as currently conducted by
it. Other than as set forth on SCHEDULE 3.1(A)(ii), no Company has any
Subsidiaries. Each Seller has all requisite corporate power and authority to
execute, deliver and perform this Agreement and to consummate the transactions
contemplated hereby. The execution and delivery of this Agreement by each Seller
and the consummation by such Seller of the transactions contemplated hereby have
been duly authorized by all requisite corporate action and, assuming the due
execution of this Agreement by the Purchaser, this Agreement constitutes the
valid and binding obligation of such Seller enforceable against such Seller in
accordance with its terms, subject only to applicable bankruptcy, insolvency,
reorganization, moratorium or other similar Laws relating to creditors' rights
generally and to general principles of equity (regardless of whether such
enforcement is considered in a proceeding at law or in equity).

          As used herein, the terms (i) "SUBSIDIARY" (a) when used with respect
to P&G Controls US, means, with respect to any Person (the "OWNER"), any
corporation or other Person of which securities or other interests having the
power to elect a majority of that corporation's or other Person's board of
directors or similar governing body, or otherwise having the power to direct the
business and policies of that corporation or other Person (other than securities
or other interests having such power only upon the happening of a contingency
that has not occurred) are held by the Owner or one or more of its Subsidiaries,
and (b) when used with respect to the UK Companies, has the meaning given in
Sections 736 and 736A of the Companies Act 1985, as amended by the Companies Act
1989; and (ii) "BUSINESS" means (a) with respect to each

                                       -6-
<Page>

Company, the business of such Company as described on SCHEDULE 3.1(A)(ii), (b)
with respect to Autronics US, the US Business, (c) with respect to P&G plc, the
UK Business, and (d) with respect to Spirent GmbH, the German Business; and the
term "BUSINESSES" means all of the foregoing collectively.

          As used herein, the term "US BUSINESS" has the meaning assigned
thereto in the US Business Transfer Agreement.

          As used herein, the term "UK SHARES" means the Spirent UK Shares and
the P&G UK Shares, collectively.

          As used herein, the term "UK BUSINESS" has the meaning assigned
thereto within the UK Business Transfer Agreement.

          As used herein, the term "UK LEASE SITES" means the following
properties (along with all buildings, fixtures and leasehold improvements
located at such properties):

          1.      Unit 1 Airfield Way Christchurch described in a lease dated 6
                  November 1980 made between (1) Borough Council of Christchurch
                  (landlord) and (2) Penny & Giles Transducers Limited (original
                  tenant) and registered at HM Land Registry under title number
                  DT 154811 (current tenant Spirent plc);

          2.      Unit 15 Airfield Road Christchurch described in a lease dated
                  6 November 1980 made between (1) Borough Council of
                  Christchurch (landlord) and (2) Penny & Giles Data Recorders
                  Limited (original tenant) and registered at HM Land Registry
                  under title number DT 79216 (current tenant Spirent plc);

          3.      Units 2, 4, 6 and 8 Airfield Way Christchurch described in a
                  lease dated 6 November 1980 made between (1) Borough Council
                  of Christchurch (landlord) and (2) Penny & Giles
                  Potentiometers Limited (original tenant) and registered at HM
                  Land Registry under title number DT 79217 (current tenant
                  Spirent plc); and

          4.      Land on the north east side of Leyside Christchurch described
                  in a supplemental deed dated 11 November 1941 made between (1)
                  Borough Council of Christchurch (landlord) and (2) Penny &
                  Giles International plc (original tenant) and registered at HM
                  Land Registry under title number DT 192449 (current tenant
                  Spirent plc).

          As used herein, the term "UK LEASE SITE LEASE" means the leases of the
UK Lease Sites as set forth above in the definition of UK Lease Sites.

          As used herein, the term "GERMAN BUSINESS" has the meaning assigned
thereto within the German Business Transfer Agreement.

                                       -7-
<Page>

          (iii)   Except as set forth on SCHEDULE 3.1(A)(iii), (A) the US Shares
are owned beneficially and of record by SII, free and clear of all Liens, other
than Permitted Liens; and (B) the Spirent UK Shares are owned beneficially and
of record by Spirent plc, free and clear of all Liens, other than Permitted
Liens. All of the entire issued share capital of P&G Aerospace UK is owned
beneficially and of record by P&G plc, free and clear of all Liens, other than
Permitted Liens. As used herein the term "LIEN" means any charge, claim, option,
lien, mortgage, encumbrance, or restriction of any kind, including any
restriction on use, voting, transfer, receipt of income or exercise of any other
attribute of ownership.

          (iv)    The US Shares constitute all of the issued and outstanding
capital stock of P&G Controls US, are duly authorized, validly issued and are
fully paid and non-assessable. Other than the proposed Transfer of the US Shares
to the Purchaser under this Agreement, there are no outstanding options,
warrants, preemptive rights, or other rights of any Person to acquire, or any
other Liens (other than Permitted Liens) on, any capital stock of P&G Controls
US. The P&G UK Shares constitute all of the entire issued share capital of P&G
Aerospace UK, and the Spirent UK Shares constitute all of the entire issued
share capital of P&G Controls UK; and all of such P&G UK Shares and Spirent UK
Shares are validly issued and fully paid up. Other than the proposed Transfer of
the UK Shares to the Purchaser under this Agreement, there is no agreement or
option outstanding, which calls for the allotment, issue or transfer, or accords
to any Person the right to call for the allotment or issue of, or otherwise
constitutes a Lien on, any of the UK Shares.

          (v)     No reference to any purported "Lien appears on any
certificate, which is to be provided by the Sellers pursuant to Section 1.2(A)
and representing US Shares or UK Shares.

     B.   NO VIOLATION.

          (i)     Neither the execution, delivery and performance by the Sellers
of this Agreement, the Additional Transfer Documents or the Ancillary
Agreements, nor the consummation of the Contemplated Transactions by the
Sellers, will (A) violate any order, ruling, writ, judgment, injunction or
decree of any Governmental Entity (an "ORDER") applicable to any Seller or any
Company; (B) result in a breach of, or default under, the Charter Documents of
any Company or any Seller; or (C) result in the imposition of any Lien on the
Shares, the US Assets, the UK Assets, the UK Lease Sites, or the German Assets,
except for such violations, breaches, defaults or Liens (other than Permitted
Liens) which would not reasonably be expected to have a Material Adverse Effect.

          (ii)    Neither the execution, delivery and performance by the Sellers
of this Agreement, the Additional Transfer Documents or the Ancillary
Agreements, nor the consummation of the Contemplated Transactions by the
Sellers, will violate any Commitment (other than as disclosed on SCHEDULE 3.1(B)
or SCHEDULE 3.1(E)) or Law applicable to any Seller or any Company; except for
such violations which would not reasonably be expected to have a Material
Adverse Effect.

                                       -8-
<Page>

          (iii)   Except as set forth on SCHEDULE 3.1(B), no consent,
authorization, or approval from, or registration or filing with, any
Governmental Entity or other third party (not obtained or made as of the date
hereof), including without limitation under the HSR Act, is required to be
obtained or made by any Seller in connection with the execution and delivery of
this Agreement, the Additional Transfer Documents or the Ancillary Agreements,
or the consummation by such Seller of the transactions contemplated hereby and
thereby, except for such consents, authorizations, or approvals which if not
obtained would not reasonably be expected to have a Material Adverse Effect.

          As used herein, the term "GOVERNMENTAL ENTITY" means any domestic,
foreign, or multinational court, government, governmental agency, arbitrator,
authority, entity or instrumentality.

          As used herein, the term "CHARTER DOCUMENTS" means (a) in the case of
SII, Autronics US or P&G Controls US, the current articles or certificate of
incorporation or organization and the bylaws of such entity; (b) in the case of
Spirent plc, P&G plc, or any UK Company, the current memorandum and articles of
association of such entity; and (c) in the case of Spirent GmbH, the current
Articles of Association ("SATZUNG") of such entity.

          As used herein, the term "HSR ACT" means the Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended.

     C.   FINANCIAL INFORMATION

          (i)     Complete and correct copies of unaudited balance sheets and
related statements of income of the Companies, the US Business, the UK Business
and the German Business, on a combined basis, for the years ended December 31,
1999, 2000 and 2001, respectively, are attached hereto as SCHEDULE 3.1(C)(i)
(collectively, the "FINANCIAL STATEMENTS"). The Financial Statements were
prepared in accordance with GAAP applied on a consistent basis throughout the
periods presented (except as required to comply with changes to GAAP), except
that the Financial Statements do not contain footnotes, and the Financial
Statements present fairly in all material respects the financial condition and
results of operations of the Companies, the US Business, the UK Business and the
German Business on a combined basis as of the dates or for the periods
presented. The income statements included in the Financial Statements reflect
all of the business conducted by the Companies, the US Business, the UK Business
and the German Business during the periods presented. The aforementioned balance
sheet as of December 31, 2001, is sometimes referred to herein as the "DECEMBER
31, 2001 BALANCE SHEET. " Notwithstanding the foregoing, the Purchaser
acknowledges that the Financial Statements (A) may include up to $100,000 in
Excluded Business Assets, and (B) do not include the UK Lease Sites; and the
foregoing shall not be considered in determining the accuracy and completeness
of this Section 3.1(C)(i).

     All employee related costs in respect of all Company employees and all
Seller employees who devote at least a majority of their working time to the
Businesses are fully reflected in the Financial Statements to the extent
required by GAAP.

                                       -9-
<Page>

     The goodwill impairment of L248,000,000 within Spirent plc's interim
results for the half year ended June 30, 2001 does not include any impairment of
goodwill attributable to the Businesses.

          (ii)    Except as set forth on SCHEDULE 3.1(C)(ii), to the knowledge
of the Sellers, the Companies have no Liabilities, other than and excluding, in
any event, any (A) Liabilities reflected or reserved against in the Financial
Statements, (B) Liabilities incurred in the Ordinary Course of Businesses since
December 31, 2001, or (C) Liabilities that will be discharged prior to the
Closing, (D) Liabilities arising under Commitments or Licenses (including those
listed or referred to on SCHEDULE 3.1(E)), (E) Liabilities which arise from or
relate to: (1) the title to or condition or sufficiency of the Leased Realty, or
any other Assets; (2) intellectual property; (3) Legal Proceedings; (4) any
compliance or non-compliance with any Laws, including Environmental Laws; (5)
any release or threatened release of, or presence, generation, transportation or
storage of, any Hazardous Material; (6) employees or former employees, employee
benefits, or labor relations; (7) insurance; or (8) Taxes; or (F) other
Liabilities which, individually or in the aggregate, would not reasonably be
expected to have a Material Adverse Effect; provided, however, that nothing in
this Section 3.1(C)(ii) shall limit any of the Sellers' other representations
and warranties set forth elsewhere in this Agreement.

          As used herein, the "ORDINARY COURSE OF BUSINESS" means the ordinary
course of the Businesses, as operated by each Company (with respect to the
Business of such Company), Autronics US (with respect to the US Business), P&G
plc (with respect to the UK Business), and Spirent GmbH (with respect to the
German Business), respectively, in each case consistent with past practices.

          (iii)   A year end adjustment for fiscal year ended 2001 was made in
the books of P&G Controls UK to correct an over-statement of inventory
associated with sub-contract costs not being correctly relieved from inventory.
The Seller represents and warrants that this issue occurred only with respect to
the 2001 financial statements. This representation and warranty in no way
derogates from the Sellers' representations and warranties in Section 3.1(C)(i).

     D.   ABSENCE OF CERTAIN CHANGES OR EVENTS. Except as set forth on SCHEDULE
3.1(D), since December 31, 2001, the Companies, Autronics US, P&G plc and
Spirent GmbH have conducted their Businesses only in the Ordinary Course of
Business, and to the Sellers' knowledge no Material Adverse Effect has occurred,
and neither any Company nor, where applicable to the US Business, the UK
Business or the German Business, Autronics US, P&G plc or Spirent GmbH, as the
case may be, has:

          (i)    changed its authorized or issued capital stock; or purchased or
redeemed its capital stock; or granted any stock options or rights to purchase
shares of its capital stock or other securities, issued any securities
convertible into capital stock, or granted any registration rights with respect
to any securities;

                                      -10-
<Page>

          (ii)   amended its Charter Documents (excluding any such amendments to
effect a name change pursuant to Section 5.7);

          (iii)  paid any bonuses, or increase in salaries or other
compensation, by any Company to any of its directors, officers, or employees
except for bonus awards and increases in salaries in the Ordinary Course of
Business, as required by applicable Laws or pursuant to any Commitment listed or
referred to on SCHEDULE 3.1(E);

          (iv)   mortgaged, pledged or subjected to any Lien any of its Assets
(including the US Assets, the UK Assets and the German Assets), other than
Permitted Liens;

          (v)    sold or otherwise disposed of any Asset material to the
operation of the Businesses, except in the Ordinary Course of Business;

          (vi)   cancelled or waived any claims or rights against third Persons,
except in the Ordinary Course of Business;

          (vii)  materially changed its accounting methods or principles, except
for any such changes required by GAAP;

          (viii) entered into or terminated or received notice of termination of
any Commitment material to the operation of the Businesses, except in the
Ordinary Course of Business;

          (ix)   suffered any damage to or destruction or loss of any asset or
property: (1) of any Company or (2) which is used in connection with any of the
Businesses (including the UK Lease Sites); in each case that would reasonably be
expected to have a Material Adverse Effect;

          (x)    adopted or increased any payments to or benefits under any US
Company Plans or German Plans, except in the Ordinary Course of Business
(excluding, in any event, the grant of any options to purchase or otherwise
acquire any capital stock of Spirent plc); or

          (xi)   agreed, orally or in writing, to do any of the foregoing.

     E.   CONTRACTS.

          (i)     SCHEDULE 3.1(E) lists or references all contracts, agreements,
or obligations, whether written or oral, including all amendments thereto
(collectively, "COMMITMENTS") to which (A) any Company is currently a party or
by which it or any of its Assets is or may be bound; or (B) Autronics US, P&G
plc, Spirent plc (with respect to the UK Lease Sites) or Spirent GmbH is
currently a party or by which it or any of its Assets is or may be bound and, in
the case of this clause (B), such Commitment was entered into or incurred in
connection with the US Business, the UK Business or the German Business, as the
case may be, of the following types:

                                      -11-
<Page>

                  (a)    Any such Commitment relating to the employment of any
current employee of such Company, Autronics US, P&G plc or Spirent GmbH or any
employee of Spirent plc or any of its Affiliates whose activities as an employee
relate primarily to any of the Businesses, or any labor contract or collective
bargaining agreement, or any Commitment providing for payments to any Person
based upon sales, purchases or profits other than direct payment for goods and
which require minimum payments of at least $100,000 per year;

                  (b)    Any such Commitment or series of related Commitments
for capital expenditures or the acquisition or construction of fixed assets
which requires or require aggregate future payments or expenditures in excess of
$300,000 in total;

                  (c)    Any such Commitment granting to any Person a first-
refusal, first-offer or other right to purchase, acquire or use (1) any of the
Assets of such Company or any US Asset, UK Asset or German Asset(other than
purchase or sales orders or other such Commitments entered into in the Ordinary
Course of Business), which pursuant to the terms thereof requires aggregate
annual payments to or by such Company, Autronics US, P&G plc or Spirent GmbH in
excess of $100,000, or (2) the Shares; or (3) the UK Lease Sites;

                  (d)    Any such Commitment with respect to a joint venture or
partnership arrangement, under which such Company, Autronics US, P&G plc or
Spirent GmbH is or has agreed to become a joint venturer or partner or otherwise
has agreed to share profits, losses, costs or liabilities with any other Person;

                  (e)    Any such Commitment pursuant to which such Company,
Autronics US, P&G plc or Spirent GmbH, Spirent plc (with respect to the UK Lease
Sites) is a lessee of any Leased Realty requiring annual payments by such
Company, Autronics US, P&G plc or Spirent GmbH in excess of $100,000;

                  (f)    Any powers of attorney to which such Company, Autronics
US, P&G plc or Spirent GmbH is a party (other than powers of attorney entered
into in the Ordinary Course of Business);

                  (g)    Any such Commitment (other than agreements both (A)
with distributors or other resellers granting geographic or market exclusivity
entered into in the Ordinary Course of Business and (B) not required to be
disclosed under Section 3.1(E)(i)(h)) that contains any provision that in any
material way prohibits any Company from engaging in any line of business or
competing with another Person within the geographic territory in which the
Company sells goods and/or services;

                  (h)    Any such Commitment with distributors or other
resellers of Business products which grant geographic or market exclusivity,
except for any such Commitment which is cancelable on 60 days or less notice
without penalty or liability on account of such termination in excess of
$100,000; and

                                      -12-
<Page>

                  (i)    Any other such Commitment which is not cancelable on 60
days or less notice and which pursuant to the terms thereof requires annual
payments by such Company, Autronics US, P&G plc or Spirent GmbH in excess of
$100,000 (other than purchase or sales orders or other such Commitments entered
into in the Ordinary Course of Business) (any such Commitment under this
sub-clause (i), a "Material Commitment").

          (ii)    Except as set forth on SCHEDULE 3.1(E)(ii), (a) all
Commitments listed on SCHEDULE 3.1(E) are now and will be, immediately following
the Transfer of the Shares and the Assets at the Closing, in full force and
effect, and represent the valid and binding obligation of the applicable
Company, Autronics US, P&G plc, Spirent plc (with respect to the UK Lease Site
Leases) or Spirent GmbH, and, to the knowledge of the Sellers, each of the other
parties thereto; and (b) the execution, delivery and performance of the
Commitments listed on SCHEDULE 3.1(E) by the applicable Company, Autronics US,
P&G plc, Spirent plc (with respect to the UK Lease Site Leases) or Spirent GmbH
are not in violation of the Charter Documents of such applicable Company,
Autronics US, P&G plc, Spirent plc (with respect to the UK Lease Site Leases) or
Spirent GmbH, except to the extent that such a violation would not reasonably be
expected to have a Material Adverse Effect.

          (iii)   Each Company and each of Autronics US, P&G plc, Spirent GmbH
and Spirent plc holds all permits, licenses, approvals, consents and
authorizations issued by any Governmental Entity or other Person and which are
required by applicable Laws and material to the operation of its respective
Business (or, in the case of Spirent plc, material to its tenancy of the UK
Lease Sites) (collectively, "LICENSES") and obtained each such License in
compliance with all Laws applicable to its issuance, and a complete and accurate
list of all such Licenses is set forth on SCHEDULE 3.1(E)(iii). No Company or
Seller has received notice of any Legal Proceeding and, to the knowledge of the
Sellers, no such Legal Proceeding has been threatened, which would, if
successful on the merits, lead to a revocation, suspension, or limitation of the
rights of any such Licenses, and each Company, and each of Autronics US, P&G plc
and Spirent GmbH, and Spirent plc (with respect to the UK Lease Sites) as
applicable, is in material compliance with each of such Licenses. To the
knowledge of the Sellers, all applications required to have been filed for
renewal of any such Licenses have been duly filed on a timely basis with all
appropriate Governmental Entities or other Persons and all other filings
required to have been made with respect to such Licenses have been made on a
timely basis with all appropriate Governmental Entities or other Persons, except
to the extent any such failure to file or make filings would not reasonably be
expected to have a Material Adverse Effect.

     F.   TITLE TO AND CONDITION OF PROPERTIES.

          (i)     SCHEDULE 3.1(F) lists all material real estate owned or leased
by any Company, Autronics US, P&G plc or Spirent GmbH and lists the UK Lease
Sites (the "LEASED REALTY"), PROVIDED, HOWEVER, that the term "LEASED REALTY"
shall mean, in addition to the UK Lease Sites, in the case of Autronics US, only
such material leased real estate where the leasehold is included within the US
Assets, in the case of P&G plc, only such material leased real estate where the
leasehold is included within the UK Assets, and in the case of Spirent GmbH,
only such material leased real estate where the leasehold is included within the
German

                                      -13-
<Page>

Assets. Each of Autronics US, P&G plc and Spirent GmbH, has valid leasehold
interests in any Leased Realty identified on said schedule as being leased to
such entity as lessee; in each case free and clear of Liens other than Permitted
Liens. Spirent plc has valid leasehold interests in the UK Lease Sites free and
clear of Liens other than Permitted Liens.

          As used herein, the term "PERMITTED LIENS" means any Liens which (1)
are listed on SCHEDULE 3.1(F); (2) are reflected in the Financial Statements;
(3) are for Taxes or other charges or assessments of any Governmental Entity
which are not yet due and owing or are subject to a good faith dispute, are not
material in amount and are being pursued diligently by appropriate Legal
Proceedings; (4) constitute Liens of carriers, warehousemen, mechanics and
materialmen, or similar Liens, incurred in the Ordinary Course of Business; (5)
constitute statutory Liens in favor of landlords with respect to real property
leased, or protective UCC filings in favor of lessors of personal property
leased, to any Company, Autronics US, P&G plc or Spirent GmbH;or (6) with
respect to real property only, are minor imperfections in title, are not
substantial in amount, and do not materially detract from the value or interfere
with the current use of the property subject to such Liens; (7) restrictions on
transfer or change in control provisions which are disclosed in SCHEDULE 3.1(B)
or SCHEDULE 3.1(E); (8) restrictions or limitations arising under Laws
(including zoning and land use restrictions and restrictions relating to the
transfer of securities); or (9) restrictions created by or arising under any of
the Commitments disclosed in SCHEDULE 3.1(E).

          (ii)    No Company or Seller has received notice of any condemnation
proceedings and, to the knowledge of the Sellers, no condemnation proceedings
have been threatened, in each case with respect to any of the Leased Realty, and
no such property has been condemned. No Company or Seller has received notice of
any Legal Proceedings, and, to the knowledge of the Sellers, no Legal
Proceedings have been threatened, that could, with the passage of time or
otherwise, give rise to a Lien (excluding a Permitted Lien) against the Leased
Realty.

          (iii)   Autronics US has legal and beneficial ownership of all of the
US Assets, P&G plc has legal and beneficial ownership of all of the UK Assets,
and Spirent GmbH has legal and beneficial ownership of all of the German Assets,
in each case free and clear of Liens other than Permitted Liens. The Assets of
the Companies, along with the US Assets, the UK Assets, the UK Lease Sites, and
German Assets, which include buildings, plants, structures, machinery,
equipment, leasehold improvements, business machines, tooling, vehicles, parts,
furniture, furnishings, plant and office equipment are, taken as a whole,
structurally sound and of a condition and state of repair adequate for the uses
to which they are being put.

          The Assets of the Companies, along with the US Assets, the UK Assets,
German Assets, the UK Lease Sites, the UK Lease Site Leases and the Excluded
Business Assets, are all those material to the operation of the Businesses as
they are currently operated.

          For purposes of the preceding sentence only, the term "Assets" shall
include those assets which are disclosed on the Disclosure Schedule as being
held or owned by an Affiliate of

                                      -14-
<Page>

the Companies or any Seller and which are to be transferred to the Purchaser or
to a Company at or prior to Closing.

     G.   INTELLECTUAL PROPERTY ASSETS.

          (i)     Set forth on SCHEDULE 3.1(G) is a list of all material patents
and patent applications, registered service marks and trademarks and service
mark and trademark applications, registered copyrights and copyright
applications, and similar intangible rights which are owned by or licensed to
any Company and used in the Businesses, or which are owned by or licensed to
Autronics US, P&G plc or Spirent GmbH and included in the US Assets, the UK
Assets or the German Assets; excluding in any case "off the shelf" software or
similar property which is readily available on a commercial or retail basis
(collectively, the "INTELLECTUAL PROPERTY"). To the knowledge of the Sellers (1)
the use of the Intellectual Property and the Additional Intellectual Property,
as currently used by the Companies, Autronics US, P&G plc and Spirent GmbH in
the Businesses, does not conflict with or infringe in any material respect upon
any intellectual property rights of others; and (2) no other Person is
infringing in any material respect on the rights of the Companies, Autronics US,
P&G plc or Spirent GmbH in such owned Intellectual Property or such Additional
Intellectual Property.

     As used herein the term "Additional Intellectual Property" means know-how,
trade secrets, confidential information, customer lists, software, technical
information, data, process technology, plans, drawings, and blue prints to the
extent any of the foregoing is material to the operation of the Businesses.

          (ii)    One or more of the Companies or the Sellers (in connection
with the Businesses) is the owner of all right, title, and interest in and to
the Intellectual Property, free and clear of all Liens (other than Permitted
Liens) and has the right to use without payment to a third party all of the such
Intellectual Property (except for payments due under Material Commitments). To
the knowledge of the Sellers one or more of the Companies or the Sellers (in
connection with the Businesses) is the owner of all right, title, and interest
in and to, or otherwise has all rights to use (as currently being used) the
Additional Intellectual Property, free and clear of all Liens (other than
Permitted Liens). Any such usage rights do not require payment to a third party
on account of such Additional Intellectual Property (except for payments due
under Material Commitments)

     H.   COMPLIANCE WITH LAWS. Except as set forth on SCHEDULE 3.1(H), each of
the Companies is and at all times since February 19, 1996 has been in compliance
with all Laws (including the provisions of the Occupational Safety and Health
Act (29 U.S.C.A. Section 651 ET SEQ.) ("OSHA") other than those portions of such
Act addressed in Section 3.1(J)) applicable to the ,Companies; and each of
Autronics US, P&G plc and Spirent GmbH is, and at all times since February 19,
1996 has been, in compliance with all Laws (including the provisions of OSHA
other than those portions of such Act addressed in Section 3.1(J)) applicable to
the ownership of its assets and operation of its Business; and Spirent plc is,
and at all times since February 19, 1996 has been, in compliance with all Laws
(including the provisions of OSHA other than those portions of such Act
addressed in Section 3.1(J)) applicable to its tenancy of the UK Lease Sites;

                                      -15-
<Page>

in each case except for such non-compliance as would not reasonably be expected
to result in a Material Adverse Effect. This Section 3.1(H) is not intended to
cover Laws relating to the issuance of Licenses, which are addressed in Section
3.1(E)(iii), Environmental Laws, which are addressed in Section 3.1(J), ERISA
and other employee benefit Laws (including Laws relating to pension matters),
which are addressed in Section 3.1(K), Tax Laws, which are addressed in Section
3.1(N), or Laws relating to payments to third parties, which are addressed in
Section 3.1(R).

     I.   LITIGATION. Except as set forth on SCHEDULE 3.1(I) or as would not
reasonably be expected to result in a Material Adverse Effect, there are no
Legal Proceedings pending or, to the knowledge of the Sellers, threatened
against any Company or any Seller that seek to enjoin or obtain damages in
respect of the consummation of the transactions contemplated by this Agreement,
or that relate to or may affect any of the Businesses or Assets.

     J.   COMPLIANCE WITH ENVIRONMENTAL LAWS. To the Sellers' knowledge, except
as set forth on SCHEDULE 3.1(J) or as would not reasonably be expected to result
in a Material Adverse Effect (and excluding the Dorset Environmental Matter,
which is governed by Section 9.14(A)(2)):

          (a)     Each Company is in compliance with all Environmental Laws
applicable to the operation of its Business; Autronics US is in compliance with
all Environmental Laws applicable to the operation of the US Business; Spirent
GmbH is in compliance with all Environmental Laws applicable to the operation of
the German Business; P&G plc is in compliance with all Environmental Laws
applicable to the operation of the UK Business; and Spirent plc is in compliance
with all Environmental Laws applicable to its tenancy of the UK Lease Sites.

          (b)     Within the past three (3) years: (i) no Company or Seller has
received any written notice from any Governmental Entity asserting a violation
of any Environmental Law in connection with the operation of any Business of any
Company; and (ii) none of Autronics US, P&G plc and Spirent GmbH or any other
Seller has received any written notice from any Governmental Entity asserting a
violation of any Environmental Law in connection with the operation of the US
Business, the UK Business or the German Business.

          (c)     As used herein:

                  (i) The term "ENVIRONMENTAL LAW" means: (A) with respect to
P&G Controls US and Autronics US: (1) the Comprehensive Environmental Response,
Compensation and Liability Act, 42 U.S.C. Section 9601 et seq.; (2) the Toxic
Substances Control Act, 15 U.S.C. Section 2101 et seq.; (3) the Hazardous
Materials Transportation Act, 49 U.S.C. Section 5101 et seq.; (4) the Federal
Water Pollution Control Act, 32 U.S.C. Section 1251 et seq.; (5) the Federal
Solid Waste Disposal Act, 42 U.S.C. Section 6901 et seq.; (6) the Federal Clean
Air Act, 42 U.S.C. Section 1857 et seq. and (7) OSHA (but only to the extent
such law in this clause (7) applies to the use, storage, transportation,
discharge, or release of Hazardous Materials by such company), each as amended
to date; (B) with respect to each UK Company and P&G plc, and Spirent plc (with
respect to the

                                      -16-
<Page>

UK Lease Sites), all laws directly applicable in the UK with regard to the
pollution or protection of the environment (the term "environment" for this
purpose having the same meaning as is set out in Section 1(2) of Environmental
Protection Act 1990); and (C) with respect to Spirent GmbH the following German
Laws: (1) UMWELTHAFTUNGSGESETZ; (2) VERORDNUNG UBER GEFAHRLICHE STOFFE
(GEFAHRSTOFFVERORDNUNG); (3) VERORDNUNG ZUR TRANSPORTGENEHMIGUNG
(TRANSPORTGENEHMIGUNGSVERORDNUNG); (4) GESETZ ZUR ORDNUNG DES WASSERHAUSHALTS
(Wasserhaushaltsgesetz); (5) GESETZ ZUR FORDERUNG DER KREISLAUFWIRTSCHAFT UND
SICHERUNG DER UMWELTVERTRAGLICHEN BESEITIGUNG VON ABFALLEN
(KREISLAUFWIRTSCHAFTS- UND ABFALLGESETZ); (6) GESETZ UBER DIE VERMEIDUNG UND
ENTSORGUNG VON ABFALLEN (ABFALLGESETZ); (7) GESETZ ZUM SCHUTZ VOR SCHADLICHEN
UMWELTEINWIRKUNGEN DURCH LUFTVERUNREINIGUNGEN, GERAUSCHE, ERSCHUTTERUNGEN UND
AHNLICHE VORGANGE (BUNDES-IMMISIONSSCHUTZGESETZ); (8) ERSTE ALLGEMEINE
VERWALTUNGSVORSCHRIFT ZUM BUNDES-IMMISSIONSSCHUTZGESETZ (TECHNISCHE ANLEITUNG
ZUR REINHALTUNG DER LUFT); and (9) GESETZ ZUM SCHUTZ VOR SCHADLICHEN
BODENVERANDERUNGEN UND ZUR SANIERUNG VON ALTLASTEN (BUNDES-BODENSCHUTZGESETZ).

                  (ii)   the term "HAZARDOUS MATERIAL" means any pollutant,
toxic substance, hazardous waste, hazardous material, or hazardous substance, as
any of the foregoing may be defined in any Environmental Law applicable to a
particular Business.

          Notwithstanding anything herein to the contrary, all matters relating
to Laws applicable to the protection of the environment generally, or of land,
water or air specifically, or to discharges, releases, creation, storage or
transportation of Hazardous Materials, including any Liabilities arising
thereunder, shall be governed exclusively by this Section 3.1(J).

     K.   EMPLOYEES AND EMPLOYEE BENEFIT PROGRAMS.

           (a)    EMPLOYEES. SCHEDULE 3.1(K) contains a complete and accurate
list of (a) the senior management and other key employees of each US Company and
Autronics US (to the extent devoting a majority of their employment time to the
US Business) as of the date hereof; (b) a list of all senior employees of each
of the UK Companies and the UK Business as of the date hereof and (c) the senior
management and other key employees devoting at least a majority of their working
time to the performance of services for the German Business as of the date
hereof (the ""German P&G EMPLOYEES"").

          (b)     EMPLOYEE BENEFIT PROGRAMS.

                  (i)    P&G CONTROLS US AND AUTRONICS US.

                  (1)    Set forth on SCHEDULE 3.1(K)(b)(i) is a complete and
correct list of (1) each "employee benefit plan" (within the meaning of section
3(3) of the Employee Retirement Income Security Act of 1974, as amended
("ERISA")). All such plans are collectively referred to as the "US COMPANY
PLANS."

                  (2)    Each US Company Plan has been established and
administered in accordance with its terms, and in material compliance with the
applicable provisions of ERISA

                                      -17-
<Page>

and the Internal Revenue Code of 1986, as amended (the "CODE"). The terms of
each US Company Plan that is intended to be qualified within the meaning of Code
Section 401(a) have been determined by the Internal Revenue Service to be so
qualified, and neither P&G Controls US nor any of the Sellers is aware of any
event or circumstance that could cause the Internal Revenue Service to
disqualify any US Company Plan that is intended to qualify under section 401(a)
of the Code. With respect to any US Company Plan, no actions, audits,
examinations, suits or claims (other than routine claims for benefits in the
ordinary course) are pending or to Sellers' knowledge threatened. Neither P&G
Controls US nor Autronics US nor any ERISA Affiliate has engaged in a prohibited
transaction, as such term is defined under Code section 4975 or ERISA section
406, which would subject P&G Controls US or Autronics US to any Taxes, penalties
or other Liabilities under Code section 4975 or ERISA sections 409 or 502(i). No
US Company Plan has incurred any "accumulated funding deficiency" as such term
is defined in ERISA section 302 and Code section 412 (whether or not waived),
and, except with respect to the following plans relating to Keystone
Thermometrics Corporation: (1) the Group Pension Plan for Hourly Employees of
Keystone Thermometrics Corporation, and (2) the Group Pension Plan for Salaried
Employees of Keystone Thermometrics Corporation (the "Keystone Plans"); neither
P&G Controls US, Autronics US nor any of their respective Affiliates that was at
any time during the six-year period ending on the date of this Agreement treated
as a single employer together with any of them under section 414 of the Code (an
"ERISA Affiliate"), has ever maintained, had an obligation to contribute to,
contributed to, or incurred any Liability with respect to, a pension plan that
is or was subject to Title IV of ERISA or section 412 of the Code.

                  (3)    With respect to each US Company Plan, P&G Controls US
or Autronics US, as the case may be, has heretofore delivered to the Purchaser,
as applicable, complete and correct copies of each of the following documents:

                         A.   the US Company Plan and any amendments thereto (or
                  if the US Company Plan is not a written agreement, a
                  description thereof),

                         B.   the three most recent annual Form 5500 reports
                  filed with the Internal Revenue Service,

                         C.   the most recent statement filed with the
                  Department of Labor pursuant to 29 U.S.C. Section 2520.104-23,

                         D.   the most recent summary plan description and
                  summaries of material modifications thereto,

                         E.   the trust agreement, group annuity contract or
                  other funding agreement that provides for the funding of the
                  US Company Plan,

                         F.   the most recent determination letter received from
                  the Internal Revenue Service with respect to each US Company
                  Plan that is intended to qualify under section 401.

                                      -18-
<Page>

                  (4)    There are no U.S. Company Plans required to satisfy the
requirements of Section 501(c)(9) of the Code. Except for the bonuses described
in Section 5.6(G), the consummation of the transactions contemplated by this
Agreement, either alone or in conjunction with another event (such as a
termination of employment), will not (i) entitle any current or former employee
or officer of P&G Controls US, to severance pay, or any other payment under a US
Company Plan, (ii) accelerate the time of payment or vesting of benefits under a
US Company Plan, or (iii) increase the amount of compensation due any such
employee or officer. Neither P&G Controls US nor Autronics US, nor any of their
respective Subsidiaries, or Affiliates contributes to, has any obligation to
contribute to, or has any Liability (including withdrawal liability as defined
in ERISA Section 4201) under or with respect to any Multiemployer Plan (as
defined in Section 3(37)(A) of ERISA). None of the US Company Plans is a Pension
Plan (as defined in Section 3(2)(A) of ERISA).

                  (ii)   UK COMPANIES AND P&G PLC.

                  (1)    Set forth on SCHEDULE 3.1(K)(b)(ii) are details of
material employee benefits and remuneration and employee benefit schemes
applicable to the employees of each of the UK Companies and the UK Business
(collectively referred to herein as the "UK Company Plans"). There are no
outstanding disputes or claims (other than routine claims in the Ordinary Course
of Business) in respect of such UK Company Plans. Except pursuant to the UK
Company Plans the UK Companies and the UK Business have not paid, provided or
contributed towards, and are not under any obligation or commitment (whether or
not legally enforceable or written or unwritten or of an individual or
collective nature) to pay, provide or contribute towards, any pension, lump sum,
gratuity, indemnity, deferred compensation, payment of expenses, bonus or
incentive benefit, or other benefit similar to any of these, given or to be
given on or following leaving employment, death, ill-health, injury or
disablement or in anticipation of leaving employment or after leaving employment
or after death, or be given on or in anticipation of or in connection with any
change in the nature of the employment of the employee concerned for or in
respect of any present employee, director or other officer (or any spouse, child
or dependant thereof) of the UK Companies and the UK Business.

                  (2)    For purposes of this Section 3.1(K)(ii), the term "UK
PENSION SCHEMES" means the following: (I) the Spirent Staff Pension and Life
Assurance Plan (the "STAFF PLAN"); and (II) the Spirent Retirement Cash and Life
Assurance Plan (the "CASH PLAN").

                  A. The UK Pension Schemes are the only pension schemes or
                     plans under which the UK Companies whose registered office
                     is in the United Kingdom (the "UK EMPLOYER COMPANIES") or
                     the UK Business are under any obligation to provide
                     retirement, death or life assurance benefits or under which
                     any such benefit may be provided for any of the employees
                     or officers or former employees or officers of the UK
                     Employer Companies or any of the UK Business Employees (as
                     defined in the UK Business Transfer Agreement) or for any
                     dependent of any such person (such persons collectively,
                     the "RELEVANT MEMBERS").

                                      -19-
<Page>

                  B. The Staff Plan trust deed and rules dated 28 December 1994,
                     and the deed of rectification dated 26 March 1996 (such
                     deeds collectively, the "STAFF PLAN RULES"), disclosed to
                     the Purchaser are a complete and accurate consolidation of
                     the deed and rules of the Staff Plan as in force as at the
                     date of this Agreement.

                  C. The Cash Plan rules dated 7 December 1983, and the
                     subsequent deeds of amendment dated 14 December 1983, 1
                     November 1984, 16 March 1993 and 10 October 1997
                     (collectively, the "CASH PLAN RULES") disclosed to the
                     Purchaser in aggregate comprise the current rules of the
                     Cash Plan at the date of this Agreement.

                  D. The Sellers have given to the Purchaser copies of all
                     current explanatory guides and announcements relating to
                     the Staff Plan and the Cash Plan, which have been issued to
                     the employees of the UK Employer Companies and to the UK
                     Business Employees.

                  E. The Staff Plan Rules and the Cash Plan Rules, together with
                     the explanatory guides and announcements referred to in
                     clause (D) above, fully define the current benefits of
                     Relevant Members under the Staff Plan and the Cash Plan,
                     and no augmentation, discretion or practice has created an
                     obligation to provide benefits or an expectation of
                     receiving benefits in excess of or different from those set
                     out in those documents in respect of any Relevant Member.

                  F. The UK Pension Schemes are exempt approved by the UK Inland
                     Revenue within the meaning of Chapter 1 of Part XIV of the
                     Income and Corporation Taxes Act 1988, and there is in
                     force in respect of the employments to which the Staff Plan
                     relates an appropriate contracting-out certificate within
                     the meaning of the Pension Schemes Act 1993.

                  G. All amounts due to the UK Pension Schemes or in respect of
                     life assurance coverage by or in respect of Relevant
                     Members as at the Closing Date have been paid.

                  H. A list of the employees of the UK Employer Companies and of
                     the UK Business Employees who are active members of the UK
                     Pension Schemes setting out all information required to
                     determine their entitlements to benefits under the UK
                     Pension Schemes has been made available by the Sellers to
                     the Purchaser.

                  I. The UK Employer Companies, the UK Business and the
                     provisions of the UK Pension Schemes have not
                     discriminated, whether directly or indirectly, between male
                     and female employees who are or have been employed by any
                     of the UK Employer Companies or who are currently

                                      -20-
<Page>

                     employed in the UK Business with respect to eligibility,
                     the rate of contributions, the amount of any benefits
                     provided or the date from which such benefit will or may be
                     provided in any way which is contrary to Article 141 of the
                     Treaty of Rome or any statute under the Laws of the United
                     Kingdom.

                  J. There is no dispute with regard to the benefits payable to
                     or in respect of any of the employees of the UK Employer
                     Companies or any of the UK Business Employees under the UK
                     Company Plans. No legal proceedings in connection with the
                     UK Company Plans are pending, threatened or expected
                     against any of the UK Employer Companies or the UK
                     Business, and so far as the Sellers are aware there is no
                     fact or circumstance likely to give rise to any such
                     proceedings.

                  K. All relevant benefits (as defined in section 612(1) of the
                     United Kingdom Income & Corporation Taxes Act 1988)
                     promised by the UK Employer Companies for former employees
                     of the UK Employer Companies are fully secured by funded
                     pension schemes and no claims will be made against the UK
                     Employer Companies in respect of such relevant benefits.

                  L. The UK Employer Companies have observed and performed all
                     their obligations under the UK Company Plans.

                  (iii)  SPIRENT GmbH. Set forth on SCHEDULE 3.1(K)(b)(iii) is a
list of each employee benefit plan and any other plans, programs, policies or
other arrangements covering the German P&G Employees, including profit sharing,
pension, retirement, bonus, incentive compensation, stock option, deferred
compensation or other written material employee benefit plans, agreements,
contracts or commitments for the benefit of the German P&G Employees ("GERMAN
PLANS").

          (c)     AUTRONICS US WORKFORCE REDUCTION. The termination by Autronics
US of 11 employees as part of a reduction in work force in October 2001 was
conducted in full compliance with applicable Laws and with any Commitment or
Commitments to which Autronics was then subject.

     L.   LABOR RELATIONS. Except as set forth on SCHEDULE 3.1(L), no Company is
a party to any collective bargaining agreement or other similar labor
Commitment, and none of Autronics US, P&G plc and Spirent GmbH is a party to any
collective bargaining agreement or other similar labor Commitment covering
employees of its Business. Except as set forth on SCHEDULE 3.1(L): (i) there
are, and since January 1, 1998 have been, no strikes, work slowdowns or
stoppages, widespread picketing, or formal employee grievance processes pending
or, to the knowledge of the Sellers, threatened, against or affecting the
Businesses, and (ii) no Company or Seller (with respect to its Business) is
currently a party to, or, to the knowledge of the Sellers, currently threatened
with, any Legal Proceeding by any employee or former employee or Governmental
Entity relating to any alleged violation of Law pertaining to labor relations or

                                      -21-
<Page>

employment matters, including any Laws relating to wages and hours, worker's
compensation or immigration.

     M.   INSURANCE. All policies of insurance relating to the Businesses with
respect to any periods which include the Closing Date are valid and enforceable
and in full force and effect. Complete and accurate schedules of such policies
as of July 31, 2001, showing the amounts and types of coverage, have been
delivered to the Purchaser. All premiums, including any current or retrospective
premiums or other like arrangement with respect to such policies of insurance
which are currently maintained, have been paid when due with respect to all
periods prior to the Closing. No notice of cancellation or termination has been
received by any Company or Seller with respect to any such policy of insurance,
and except as set forth on SCHEDULE 3.1(M) no claim relating to the Businesses
is currently reserved or, to the knowledge of the Sellers, should be reserved,
under any such policy of insurance involving an amount in excess of $250,000
(excluding provisional notices of prospective non-renewal for US insurance
policies which are routinely sent, not in response to any specific casualty
event or loss history, by US insurance companies within a certain period before
such policy would normally expire).

          (b) All claims relating to the Businesses that have become known to
the Spirent plc risk management department and that may be insured under
applicable policies of insurance have been reported to the applicable insurer.
Complete and accurate reports of all claims above local working deductibles
relating to the Businesses as of July 31, 2001 have been delivered to the
Purchaser with respect to the past five (5) years or such shorter period that
the particular Business has been controlled by Spirent plc.

          (c) There are no self-insurance arrangements by or affecting any
Company or Business other than normal working policy deductibles.

     N.   TAXES.

          (a)     P&G CONTROLS US AND AUTRONICS. Each of P&G Controls US and
Autronics US (with respect to the US Business) has timely filed all Tax Returns
and reports required to be filed by or with respect to it pursuant to applicable
Law, and such Tax Returns are accurate, complete and correct in all material
respects. Each of P&G Controls US and Autronics US (with respect to the US
Business) has paid all Taxes shown on such Tax Returns as being due and payable
by it, and there are no other Taxes payable on account of P&G Controls US's
Business or by Autronics US (with respect to the US Business) except for Taxes
arising from the conduct of such Business and ownership of its properties which
are not yet due and for which P&G Controls US or Autronics US has made adequate
reserves, accruals and charges in its books and records of account in accordance
with GAAP. SCHEDULE 3.1(N)(a) lists the dates since January 1, 1995 as of and
for which the federal and state corporate income/franchise, sales/use and other
Tax Returns of any P&G Controls US and Autronics US (with respect to the US
Business) were audited and closed and lists the jurisdictions in which P&G
Controls US and Autronics US (with respect to the US Business) files any such
Tax Return. Except as set forth on SCHEDULE 3.1(N)(a), there is no Tax audit or
examination now pending or, to the Sellers' knowledge, threatened with respect
to P&G Controls US or Autronics US (with respect to the US

                                      -22-
<Page>

Business). Except as set forth on SCHEDULE 3.1(N)(a), since January 1, 1995, no
correspondence has been received by P&G Controls US or Autronics US (with
respect to the US Business) from any US state or foreign taxing authority of any
jurisdiction in which P&G Controls US or Autronics US (with respect to the US
Business) does not file Tax Returns requesting information concerning the extent
of the nexus of P&G Controls US or Autronics US with such jurisdiction or
asserting that there is such a nexus so as to impose such jurisdiction's taxing
jurisdiction on P&G Controls US or Autronics US (with respect to the US
Business). All Taxes which P&G Controls US or Autronics US (with respect to the
US Business) was or is required by Law to withhold or collect have been and are
being withheld or collected by it and have been paid over to the proper
Governmental Entities or, if not yet due, are being held by any P&G Controls US
or Autronics US for such payment. Except as set forth on SCHEDULE 3.1(N)(a),
neither P&G Controls US nor Autronics US (with respect to the US Business) has
waived or extended any applicable statute of limitations relating to the
assessment of any Tax. Neither P&G Controls US nor Autronics US (with respect to
the US Business) has any Liability for Taxes of any Person (other than P&G
Controls US or Autronics US (with respect to the US Business)) under Treasury
Regulation Section 1.1502-6 (or any similar provision of state, local or foreign
law), as a transferee or successor by contract or otherwise. Except as set forth
on SCHEDULE 3.1(N)(a), each of P&G Controls US and Autronics US (with respect to
the US Business) believes that it has entered into all transactions with its
overseas Affiliates on an arms length basis and has documentation and records
which justify such belief.

          (b)     UK COMPANIES. Except as set forth on SCHEDULE 3.1(N)(b):

          (i)     the UK Companies have at all times submitted all Tax Returns
which are required to be submitted to any Tax authority;

          (ii)    the UK Companies have properly made all deductions,
withholdings, payments and retentions in respect of Tax (including PAYE and
National Insurance) required to be made in respect of any actual or deemed
payment made or benefit provided and have, to the extent required by Law,
accounted for all such deductions, withholdings, payments and retentions;

          (iii)   in the last three years the UK Companies have not been, and so
far as Spirent plc and P&G plc are aware are not likely to be, subject to any
investigation or non-routine audit or visit by any UK Tax authority;

          (iv)    the amount of Tax chargeable on the UK Companies does not
depend upon any informal concessions or informal arrangements with any Tax
authority;

          (v)     the most recent audited accounts of the UK Companies make
proper provision for deferred Tax in accordance with GAAP;

          (vi)    the UK Companies have paid all Tax that has become due and are
under no liability to pay any penalty, interest, surcharge or fine in connection
with any Tax;

                                      -23-
<Page>

          (vii)   the disposal of the UK Companies in accordance with this
Agreement will not give rise to any charge under the provisions of section 179
Taxation of Chargeable Gains Act 1992 (English law);

          (viii)  except to the extent reflected in the deferred tax provision
in the last audited accounts of the UK Companies, no chargeable gain would arise
in respect of any capital asset of the UK Companies (1) treated as such in those
accounts if that asset were to be sold for a consideration equal to the value
attributed to it in those accounts; or (2) acquired after the date to which
those accounts were prepared if that asset were to be sold for a consideration
equal to the consideration given for its acquisition;

          (ix)    except to the extent reflected in the deferred tax provision
in the last audited accounts of the UK Companies, if all the assets of each UK
Company were to be sold at an aggregate value equal to the value attributed to
those assets in those accounts, no capital allowances balancing charge would be
made on that UK Company;

          (x)     the UK Companies are not close companies as defined in section
414 Income and Corporation Taxes Act 1988 (English law);

          (xi)    each UK Company is duly registered for the purpose of UK Value
Added Tax;

          (xii)   none of the UK Companies owns any asset which is a capital
item for the purposes of part XV Value Added Tax Regulations 1995;

          (xiii)  none of the UK Companies has entered into a transaction wholly
or mainly for the avoidance of Tax or to which any UK anti-avoidance legislation
may apply;

          (xiv)   With respect to the UK Business only (and not, for the
avoidance of doubt, in respect of P&G Aerospace UK) (1) all documentation
required to be stamped by P&G plc to prove title to the UK Assets has been duly
stamped; (2) none of the UK Assets is subject to the provisions of part XV of
the Value Added Tax Regulations 1995 (the capital goods scheme); (3) over the
last three years P&G plc in relation to the UK Business has not been subject to
any investigation or non-routine audit or visit by any tax authority of the UK;
(4) the profits of the UK Business have not been calculated as a result of any
special practice or concession or adopted by the Inland Revenue; and (5) the
Sellers have not elected to charge VAT in respect of any real estate assets of
the UK Business;

          (xv)    the UK Companies have filed all Tax Returns required to be
filed on US Form 1120F;

          (xvi)   there are no circumstances in which the UK Companies could be
held liable to pay the Taxes of any other persons;

          (xvii)  the UK Companies believe that they have entered into all
transactions with their overseas Affiliates on an arms length basis and have
documentation and records which justify such belief;

                                      -24-
<Page>

          (xviii) the UK Companies shall incur no liability to UK tax by virtue
of any write off or capitalisation of debts owed by the UK Companies on or
before Closing; and

          (xix)   the UK Companies are resident for tax purposes solely in the
UK and they do not have and have not in the last four (4) years had any
permanent establishment outside the UK.

          (c)     SPIRENT GMBH. Spirent GmbH has filed all Tax Returns required
to be filed by it in respect of its Business, including Tax Returns for all
applicable Taxes, and such Tax Returns are accurate, complete and correct in all
material respects. Spirent GmbH has paid all Taxes shown on such Tax Returns as
being due and payable, and there are no other Taxes payable on account of
Spirent GmbH's operation of its Business except: (1) as are reflected or
reserved against on the December 31, 2001 Balance Sheet; or (2) for Taxes
arising from the conduct of such Business and ownership of its properties for
and during periods subsequent to such date which are not yet due and for which
Spirent GmbH has made adequate reserves in its books and records of account.
SCHEDULE 3.1(N)(c) lists the dates since January 1, 1995 as of and for which the
Tax Returns of Spirent GmbH were audited and closed. Except as set forth on
SCHEDULE 3.1(N)(c), there is no Tax audit or examination now pending or, to the
Sellers' knowledge, threatened with respect to Spirent GmbH. All Taxes which
Spirent GmbH was or is required by Law to withhold or collect in relation to its
Business have been and are being withheld or collected by it and have been paid
over to the proper Governmental Entities or, if not yet due, are being held by
Spirent GmbH for such payment. Except as set forth on SCHEDULE 3.1(N)(c),
Spirent GmbH has not waived or extended any applicable statute of limitations
relating to the assessment of any Tax. Except as set forth on SCHEDULE
3.1(N)(c), Spirent GmbH believes that is has entered into all transactions with
its overseas Affiliates on an arms length basis and has documentation and
records which justify such belief.

     O.   BANKING MATTERS. SCHEDULE 3.1(O) sets forth (1) a list of each bank or
other financial institution at which any Company, Autronics US, P&G plc or
Spirent GmbH has a deposit account or safe deposit box for use in the
Businesses; and (2) the names of those employees authorized to access any such
account or safe deposit box.

     P.   AFFILIATED TRANSACTIONS. Except as set forth on SCHEDULE 3.1(P) or
pursuant to any of the contracts listed on SCHEDULE 3.1(E), no Company, and none
of Autronics US, P&G plc and Spirent GmbH is a party to any written agreement
for the provision of goods or services, or is otherwise obligated to make any
payments to or is entitled to receive any payments from (in the case of
Autronics US, P&G plc and Spirent GmbH, to or from their Businesses), (1) any of
its directors or officers or (2) any other Company or any Seller, or any
Affiliate of any other Company or any Seller; excluding, in any event, (a) trade
payables or receivables incurred in the Ordinary Course of Business or (b) any
such Commitment which requires minimum annual payments of less than $100,000
individually or in the aggregate and which is terminated at or prior to Closing
without any further Liability to any Company or the US Business, the UK Business
or the German Business, respectively. Except as set forth on SCHEDULE 3.1(P) or
pursuant to any of the contracts listed on SCHEDULE 3.1(E), other than the
Excluded Business Assets and the UK Lease Sites, no Company, and none of
Autronics US, P&G plc and Spirent

                                      -25-
<Page>

GmbH (in the case of Autronics US, P&G plc and Spirent GmbH, in relation to
their respective Businesses) uses any asset which is owned by any Affiliate
(other than a Company, or Autronics US, P&G plc or Spirent GmbH with respect to
the US Business, the UK Business or the German Business, respectively) and is
material to the operation of the Businesses.

     Q.   BROKERS' FEES. Neither any Company nor any Seller has entered into any
Commitment which will cause the Purchaser or the Companies (following the
Closing) to become obligated for any broker's, finder's or other similar fee or
commission in connection with this Agreement or the consummation of any of the
transactions contemplated hereby, except for Morgan Stanley & Co. Limited (or
its Affiliates), whose fees and expenses in respect of such transactions shall
be paid by the Sellers.

     R.   ABSENCE OF CERTAIN PAYMENTS. During the five (5) year period prior to
the date of this Agreement, neither any of the Companies nor any of the Sellers
(or any of their respective Subsidiaries or Affiliates) has (nor has any
director, officer, agent, or employee of any of them nor any other Person,
acting on behalf of any of them; in the case of any such agent, to the Seller's
knowledge) directly or indirectly used, or offered or promised to use, any
Company's, Seller's or any of their respective Subsidiaries' or Affiliates'
funds or other thing of value for unlawful contributions, gifts, entertainment
or other unlawful expenses relating to political activity; made or transferred
any unlawful payment other thing of value to foreign or domestic government
officials or employees or to candidates for political or political party office
or to foreign or domestic political parties or campaigns; violated any provision
of the Foreign Corrupt Practices Act of 1977 or any other similar Law which
makes unlawful payments to Government Entities or international non-governmental
agencies and their employees in exchange for favorable treatment or benefits not
otherwise available but for such payments; established or maintained any
unlawful fund of any Company's, Seller's or any of their respective
Subsidiaries' or Affiliates' monies or other assets; made any unlawful and false
or fictitious entry on the books or records of any Company, Seller or any of
their respective Subsidiaries or Affiliates; or made any unlawful bribe, rebate,
payoff, influence payment, kickback, or other unlawful payment, to any Person,
regardless of form, whether in money, property, or services, to obtain favorable
treatment in securing business or to obtain special concessions for any Company,
Seller or any of their respective Subsidiaries, or to pay for favorable
treatment for business secured or for special concessions already obtained for
any of them, PROVIDED THAT this Section 3.1(R) shall relate only to payments or
other activities as described above to the extent that such payments or
activities violate applicable Laws and such violations would reasonably be
expected to have a Material Adverse Effect.

     Section 3.2  NO IMPLIED REPRESENTATIONS. Notwithstanding anything to the
contrary herein and without in any way affecting Purchaser's right to rely on
the accuracy and completeness of the representations and warranties set forth
herein and in any agreement, certificate or other document delivered to
Purchaser pursuant to Section 1.2(A) of this Agreement: (1) it is the explicit
intent of each party hereto that the Sellers have not made and are not making
any representation or warranty whatsoever, express or implied, beyond those
expressly given in this Agreement, or in any agreement, certificate or other
document delivered to Purchaser pursuant to Section 1.2(A) of this Agreement,
including, but not limited to, any

                                      -26-
<Page>

such implied warranty or representation as to the post-Closing business, results
of operations, financial condition or prospects of any Company or the
Businesses, or as to the post-Closing value, condition, merchantability or
suitability of any Company, such Company's post-Closing Business, the
post-Closing US Business, the post-Closing UK Business or the post-Closing
German Business; and the Purchaser is not relying on any other statement,
representation or warranty, oral or written, express or implied, made by any
Seller or any Company or their respective Affiliates, representatives or agents,
including any such statement, representation or warranty contained in any
offering memorandum or any information, document or material made available to
the Purchaser or its Affiliates, representatives or agents in certain "data
rooms", management presentations or any other form in expectation of the
transactions contemplated by this Agreement and the Additional Transfer
Documents and Ancillary Agreements, except for the representations and
warranties expressly set forth in this Agreement, or in any agreement,
certificate or other document delivered to Purchaser pursuant to Section 1.2(A)
of this Agreement; and (2) the Purchaser has undertaken its own analyses and
methodologies to value the Businesses of the Companies, the US Business, the UK
Business, the German Business and the Shares, and in no event shall the Sellers
be charged with knowledge of, or have responsibility for, such analyses or
methodologies or the valuation resulting therefrom. EXCEPT AS OTHERWISE
SPECIFICALLY SET FORTH IN SECTION 3.1 OF THIS AGREEMENT, THE SELLERS EXPRESSLY
DISCLAIM ANY IMPLIED WARRANTY OR REPRESENTATION.

                                   ARTICLE IV.

                 Representations and Warranties of the Purchaser

     Section 4.1  REPRESENTATIONS AND WARRANTIES. The Purchaser represents and
warrants to the Sellers that:

          A.      CORPORATE EXISTENCE AND QUALIFICATION; DUE EXECUTION, ETC. The
Purchaser is a corporation duly organized and validly existing under the Laws of
the Delaware and has the requisite corporate power and authority to execute,
deliver and perform this Agreement and to consummate the transactions
contemplated hereby. The execution and delivery of this Agreement by the
Purchaser and the consummation by the Purchaser of the transactions contemplated
hereby have been duly authorized by all requisite corporate action and, assuming
the due execution of this Agreement by the Sellers, this Agreement constitutes
the valid and binding obligations of the Purchaser enforceable against the
Purchaser in accordance with its terms, subject only to applicable bankruptcy,
insolvency, reorganization, moratorium or other similar Laws relating to
creditors' rights generally and to general principles of equity (regardless of
whether such enforcement is considered in a proceeding at law or in equity).

          B.      NO VIOLATION.

          (i)     Neither the execution, delivery and performance by the
Purchaser of this Agreement, the Additional Transfer Documents or the Ancillary
Agreements, nor the consummation of the Contemplated Transactions by the
Purchaser, will (A) violate any Order applicable to the Purchaser or (B) result
in a breach of or default under, the charter or bylaws of

                                      -27-
<Page>

the Purchaser; except for such violations which would not reasonably be expected
to have a material adverse effect on the Purchaser's ability to perform its
obligations under this Agreement, the Additional Transfer Documents or the
Ancillary Agreements, or to consummate the Contemplated Transactions.

          (ii)    Neither the execution, delivery and performance by the
Purchaser of this Agreement, the Additional Transfer Documents or the Ancillary
Agreements, nor the consummation of the Contemplated Transactions by the
Purchaser, will violate any agreement or Law applicable to the Purchaser; except
for such violations which would not reasonably be expected to have a material
adverse effect on the Purchaser's ability to perform its obligations under this
Agreement, the Additional Transfer Documents or the Ancillary Agreements, or to
consummate the Contemplated Transactions.

          (iii)   No consent, authorization, or approval from, or registration
or filing with, any Governmental Entity or other third party (not obtained or
made as of the date hereof) is required to be obtained or made by or with
respect to the Purchaser in connection with the execution and delivery of this
Agreement or the consummation by the Purchaser of the transactions contemplated
hereby; except for such violations which would not reasonably be expected to
have a material adverse effect on the Purchaser's ability to perform its
obligations under this Agreement, the Additional Transfer Documents or the
Ancillary Agreements, or to consummate the Contemplated Transactions.

          C.      LITIGATION. There are no Legal Proceedings pending or, to the
knowledge of the Purchaser, threatened against the Purchaser that seek to enjoin
or obtain damages in respect of the consummation of the transactions
contemplated by this Agreement.

          D.      FINANCIAL ABILITY TO PERFORM. The Purchaser has available cash
funds sufficient to consummate the transactions contemplated by this Agreement.

          E.      PURCHASE FOR INVESTMENT. The Purchaser is acquiring the Shares
for investment and not with a view toward any resale or distribution thereof
except in compliance with applicable Laws, including the United States
Securities Act of 1933, as amended.

          F.      NO KNOWLEDGE OF BREACH. The Purchaser has no actual knowledge
of any breach of any of the Sellers' representations or warranties set forth in
Article III hereof.

          G.      BROKERS' FEES. The Purchaser has not made any agreement, which
will cause any Company, or any Seller to become obligated for any broker's or
other similar fee or commission as a result of any of the transactions
contemplated by this Agreement.

                                    ARTICLE V

                            Covenants and Agreements

     Section 5.1  SATISFACTION OF CLOSING CONDITIONS; CONSENTS; TRANSFER OF
BENEFITS.

                                      -28-
<Page>

          A.      COVENANTS REGARDING CLOSING CONDITIONS. The parties shall use
their respective reasonable efforts to bring about the satisfaction as soon as
practicable of all the conditions to Closing contained in Articles VI and VII.
Without limiting the generality of the foregoing, the parties shall apply for
and diligently prosecute all applications for, and shall use their respective
reasonable efforts promptly to obtain, (1) such consents, waivers, releases,
authorizations and approvals from such Governmental Entities as shall be
necessary to permit the consummation of the Contemplated Transactions; (2) such
consents, waivers, valuations, authorizations and approvals as may be required
under the Sellers' Charter Documents; and (3) such consents, waivers, releases,
authorizations and approvals from such third parties as shall be necessary to
permit the consummation of the Contemplated Transactions, provided, in the case
of the Sellers, that this Section 5.1(A)(3) shall only be applicable to such
consents, waivers, releases, authorizations as are described in Section 6.4.

          B.      NON-ASSIGNABILITY. To the extent that any Commitment, claim or
other Asset intended to be assigned to Purchaser or from which Purchaser is
intended to receive benefits or obligations hereunder is not assignable without
the consent of another Person, and such consent is not obtained by Closing, this
Agreement shall not constitute an assignment or an attempted assignment thereof
to Purchaser or an assumption of Sellers' obligations thereunder by Purchaser if
such assignment or attempted assignment and assumption would constitute a breach
thereof. If any such consent or assignment cannot be obtained, then the Seller
or the Company party to, or who owns, the relevant Commitment, claim or other
Asset intended to be assigned to Purchaser or from which Purchaser is intended
to receive benefits or obligations thereunder shall be deemed to hold the
benefit of that Commitment, claim or other Asset in trust for the Purchaser, and
the Purchaser shall (if sub-contracting or agency is permissible under the
relevant Commitment, claim or other Asset) as Seller's sub-contractor or agent
perform on behalf of Seller (but at the Purchaser's expense) all the obligations
of Seller under such Commitment, claim or other Asset; and the Purchaser shall
indemnify such Seller against all costs, expenses or Liabilities incurred by
such Seller as a result of any act, neglect, default or omission on the part of
the Purchaser to perform or comply with any such obligation of such Seller. Such
Seller shall, at the Purchaser's expense, do all such acts and things as the
Purchaser may reasonably request to enable performance of the relevant
Commitment, claim or other Asset and to provide the Purchaser with the benefit
of the relevant Commitment, claim or other Asset (including the enforcement of
any right of such Seller against the other party to the relevant Commitment,
claim or other Asset). Such Seller shall account to the Purchaser for all
monies, goods or other benefits received by Seller under the relevant
Commitment, claim or other Asset in respect of the period after the Closing Date
as soon as reasonably practicable after receipt. Provided Purchaser is not in
breach of this Section 5.1, such Seller shall not agree to any amendment or
termination of the relevant Commitment, claim or other Asset or any waiver by
Seller of its rights under the relevant Commitment, claim or other Asset without
the Purchaser's prior written consent, which shall not be unreasonably withheld
or delayed.

                                      -29-
<Page>

     In the event of a direct conflict between this Section 5.1(B) and Article
VI of the UK Business Transfer Agreement, this Section 5.1(B) shall control.

     Section 5.2  TAX MATTERS.

     A.   TAX PERIODS ENDING ON OR BEFORE THE CLOSING DATE. The Sellers shall
prepare and file or cause to be prepared and filed all Tax Returns for the
Companies and the Businesses for all periods ending on or prior to the Closing
Date which are filed after the Closing Date including income Tax Returns with
respect to periods for which a consolidated, unitary or combined income Tax
Return of all or any number of the Sellers will include the operations of one or
more of the Companies and the Businesses; PROVIDED, HOWEVER, with respect to the
UK Companies, this Section 5.2(A) shall apply only with respect to UK
corporation Tax Returns. Subject to Section 5.2(L) and Section 9.14(C)(vii), the
Sellers shall pay and be liable for all Taxes of the Companies with respect to
such periods or which arise in respect of any event, action, or transaction
which occurred during such periods, or, alternatively with respect to the UK
Companies, shall procure the surrender or transfer to the UK Companies for zero
consideration of sufficient tax reliefs to discharge such Taxes, PROVIDED,
FURTHER, with respect to the UK Companies any amounts payable by the Sellers
under this Section 5.2(A) shall be due and payable to the Purchaser on an after
tax basis. In relation to UK corporation Tax Returns which are relevant for the
purposes of this Section 5.2(A), the Sellers shall also have responsibility for
the agreement of such Tax Returns at Sellers' expense. Where a liability to Tax
arises on the UK Companies under section 179 Taxation of Chargeable Gains Act
1992 the Seller shall, if possible, procure that either it or a company which
remains under the control of the Seller after the date of Closing shall enter
together with the such UK Company into a joint election as referred to in
section 179B Taxation of Chargeable Gains Act 1992. In relation to the UK
Companies, the Sellers shall not submit any Tax Return to any Tax authority or
enter into any communication with any Tax authority without seeking the
Purchaser's consent, which shall not be unreasonably withheld or delayed, unless
such action is consistent with past practices of the UK Companies and does not
involve a Tax liability in excess of $500,000.

     B.   TAX PERIODS BEGINNING ON OR AFTER THE CLOSING DATE. The Purchaser
shall prepare and file or cause to be prepared and filed when due all Tax
Returns for the Companies for all periods beginning on or after the Closing Date
including income Tax Returns with respect to periods for which a consolidated,
unitary or combined income Tax Return of the Purchaser will include the
operations of one or more of the Companies. The Purchaser shall pay all Taxes of
the Companies with respect to such periods.

     C.   TAX PERIODS BEGINNING BEFORE AND ENDING AFTER THE CLOSING DATE. The
Purchaser shall prepare and file or cause to be prepared and filed when due any
Tax Returns of the Companies for Tax periods which begin before the Closing Date
and end after the Closing Date. The Purchaser shall permit the Sellers to review
and comment on each such Tax Return described in the preceding sentence prior to
filing. Subject to Section 5.2(G), the Sellers shall deliver to the Purchaser,
at least three (3) business days prior to the date on which such Taxes are
required to be paid, that portion of the Taxes which relates to the portion of
such taxable period

                                      -30-
<Page>

ending on the Closing Date. For purposes of this Section 5.2(C), in the case of
any Taxes that are imposed on a periodic basis and are payable for a taxable
period that includes (but does not end on) the Closing Date, the portion of such
Tax which relates to the portion of such taxable period ending on the Closing
Date shall (i) in the case of any Taxes other than Taxes based upon or related
to income or receipts, be deemed to be the amount of such Tax for the entire
taxable period multiplied by a fraction the numerator of which is the number of
days in the taxable period ending on the Closing Date and the denominator of
which is the number of days in the entire taxable period, and (ii) in the case
of any Tax based upon or related to income or receipts be deemed equal to the
amount which would be payable if the relevant taxable period ended on the
Closing Date. Subject to the proration provisions of the preceding sentence, any
credits or refunds relating to a taxable period that begins before and ends
after the Closing Date shall be taken into account as though the relevant
taxable period ended on the Closing Date. All determinations necessary to give
effect to the foregoing allocations shall be made in a manner consistent with
prior practice of the Companies.

     D.   US BUSINESS, UK BUSINESS AND GERMAN BUSINESS. Except as specifically
set forth in the US Business Transfer Agreement, the UK Business Transfer
Agreement (including without limitation Article 4 thereof), or the German
Business Transfer Agreement, the provisions of this Section 5.2 shall apply to
Taxes and Tax Returns relating to the US Business, the UK Business or the German
Business. The Sellers shall prepare and file, or cause to be prepared and filed,
all Tax Returns for Spirent GmbH in relation to the German Business for the
period up to and including the Closing Date. The Sellers shall pay, or reimburse
the Purchaser for, those Taxes in relation to the German Business with respect
to such period and for which the Purchaser may become liable according to
Section 75 of the German Tax Code (ABGABENORDNUNG).

     E.   CONTEST PROCEEDINGS. With respect to any Tax Returns for any Tax
periods, the party hereto responsible for the preparation and filing of such Tax
Return shall control the defense of any audits thereof or other Legal
Proceedings relating thereto, PROVIDED that the costs of any such defense shall
be shared by the parties hereto, pro rata based on their responsibility for
Taxes due under any such Tax Return, and PROVIDED FURTHER that no such audits or
other Legal Proceedings shall be settled in a manner which would adversely
affect the other party hereto without the prior written consent of such other
party, which consent shall not be unreasonably withheld.

     F.   DETERMINATION AND ALLOCATION OF CONSIDERATION. The parties to this
Agreement agree to allocate the total consideration transferred by the Purchaser
to the Sellers pursuant to this Agreement (the "CONSIDERATION") amongst the
various assets and liabilities in accordance with SCHEDULE 5.2(F). The Sellers
and the Purchaser agree to prepare, or cause to be prepared, and file, or cause
to be filed, an IRS Form 8594 in a timely fashion in accordance with the rules
under Section 1060 of the Code, consistent with such schedule. To the extent
that the Consideration is adjusted after the Closing Date, the parties agree to
revise and amend the schedule and IRS Form 8594 in a manner consistent with that
used in developing the allocation on said SCHEDULE 5.2(F). The determination and
allocation of the Consideration derived pursuant to this subsection shall be
binding on the parties hereto and their Affiliates for all Tax reporting
purposes.

                                      -31-
<Page>

     G.   TRANSFER TAXES. Payment by the Purchaser to the Sellers of the
Purchase Price shall be made in full without any deduction or withholding,
whether in respect of set-off, counterclaim, or Taxes (other than any Taxes
imposed on the Sellers that are based on net income or profits), unless the
deduction or withholding is required by Law, in which event the Purchaser shall
(1) ensure that such deduction or withholding does not exceed the minimum amount
legally required; (2) pay to the Sellers such additional amount so that the net
amount received by the Sellers shall be the full amount which would have been
received by the Sellers had no such deduction or withholding been made, except
that no additional amount shall be payable to the extent such deduction or
withholding relates to a Tax liability of the Sellers; (3) pay to the relevant
Governmental Entities within the period for payment permitted by applicable Law
the full amount of the deduction or withholding; and (4) furnish to the Sellers
within the period for payment permitted by the relevant Law, a certificate of
deduction or equivalent evidence of the relevant deduction or withholding;
provided that if California Laws require a withholding of part of the
Consideration in connection with the transfer of the US Assets under the US
Business Transfer Agreement on account of unpaid California Taxes owing from
Autronics US, then the parties shall use all commercially reasonable efforts to
obtain a release of such requirement from the applicable authorities by Closing;
if notwithstanding the foregoing no such release can be obtained, then the
Purchaser shall be entitled to make such withholding until such withholding is
no longer required under California Law (at which time the Purchaser shall pay
over such withheld amount to the Sellers), provided such withholding does not
exceed, in any event, $2,000,000. Except as set forth in the foregoing proviso,
all sales, use, transfer, stamp, conveyance, value added or other similar taxes,
duties, excises or governmental charges imposed by any taxing jurisdiction,
domestic or foreign, and all recording or filing fees, notarial fees and other
similar costs with respect to the Transfer of the Shares, the US Assets, the UK
Assets and the German Assets will be borne by the Purchaser.

     H.   COOPERATION ON TAX MATTERS. The Purchaser, the Companies and the
Sellers shall cooperate (and cause their respective Affiliates to cooperate)
fully, as and to the extent reasonably requested by the other parties, in
connection with the preparation and filing of Tax Returns pursuant to this
Section 5.2 and any Tax Audit, litigation or other proceeding with respect to
Taxes and payments in respect thereof. Such cooperation shall include the
retention and (upon the other parties' request) the provision of records and
information which are reasonably relevant to any such Tax Audit, litigation or
other proceeding and making employees available on a mutually convenient basis
to provide additional information and explanation of any material provided
hereunder. The parties shall provide timely notice to the other in writing of
any pending or proposed Tax Audits or assessments with respect to Taxes for
which the other may have an indemnification obligation under this Agreement. The
parties shall furnish the other with copies of all relevant correspondence
received from any taxing authority in connection with any Tax Audit or
information request with respect to any Taxes for which the other may have an
indemnification obligation under this Agreement.

     I.   POWERS OF ATTORNEY. At least five (5) days prior to Closing, the 5
Purchaser shall provide Spirent plc with a schedule listing which powers of
attorney disclosed under SCHEDULE 3.1(E) which Purchaser wants terminated as of
the Closing, and immediately prior to the Closing

                                      -32-
<Page>

Spirent plc (or the respective Company) will use its reasonable efforts to
terminate, or cause to be terminated, each such power of attorney appearing on
the schedule provided by the Purchaser.

     J.   TAX SHARING AGREEMENTS. All tax sharing agreements or similar
agreements with respect to or involving any Company shall be terminated as to
the Companies as of the Closing Date. After the Closing Date, no Company shall
be bound by or have any Liability under any such tax sharing agreement or
similar agreement.

     K.   SELLERS' CONTROL OF UK TAX MATTER. If the disposal of the UK Companies
in accordance with this Agreement gives rise to any charge to UK tax under
section 179 Taxation of Chargeable Gains Act 1992 (or if the UK Inland Revenue
assert that such a charge arise) and provided that neither Purchaser nor any of
its Affiliates including the UK Companies, shall be liable in respect of any
such charge, then the following provisions shall apply:

          (i)     the Sellers shall have the full conduct of negotiating and
                  agreeing such charge with the Inland Revenue;

          (ii)    the Purchaser shall and shall procure that any relevant UK
                  Company shall as soon as is reasonably practicable notify the
                  Sellers of any information which comes to the attention of the
                  Purchaser and/or the UK Company which indicates that such a
                  charge will arise or has arisen, and shall provide the Sellers
                  with such information and assistance as the Sellers shall
                  reasonably require to negotiate and agree the charge with the
                  Inland Revenue; and

          (iii)   the Sellers shall keep the Purchaser promptly informed of the
                  progress of such negotiations and agreement.

     L.   UK TAX RELIEFS.

          (i)     This Section 5.2(L) shall apply in respect of all Schedule D
                  Case I corporation tax losses held by any UK Companies at the
                  Closing which are not reflected in the balance sheets included
                  in the Financial Statements and which are capable of being
                  surrendered by the UK Companies to the Sellers or any other
                  Person connected with the Sellers ("RELEVANT RELIEFS").

          (ii)    At any time following the Closing, the Sellers shall be able
                  to request in writing that the UK Companies surrender the
                  Relevant Reliefs to the Sellers or such other Person as the
                  Sellers shall direct to the extent that this is permissible by
                  Law. It is acknowledged that prior to Closing payment will be
                  made to the UK Companies in consideration of such surrenders.

                                      -33-
<Page>

          (iii)   The Purchaser shall procure that the UK Companies sign such
                  elections and take such other actions as the Sellers shall
                  require procuring the effective and prompt surrender of the
                  Relevant Reliefs.

          (iv)    The Purchaser shall be under no obligation to procure that the
                  UK Companies make any election under Section 171A TCGA.

          (v)     The Sellers shall not use their powers under this Section
                  5.2(L) so as to create a Tax charge in the UK Companies.

     M.   CERTAIN DEFINITIONS.  For purposes of this Agreement:

          (i)     "TAX" or "TAXES" means all federal, state, provincial,
                  territorial, local, foreign and other taxes, assessments, or
                  governmental charges in each case in the nature of a tax,
                  including income, capital, franchise, capital stock, excise,
                  property, sales, use, service, service use, leasing, leasing
                  use, goods and services, gross receipts, value added, single
                  business, alternative or add-on minimum, occupation, real and
                  personal property, stamp, workers' compensation, severance,
                  windfall profits, customs, duties, disability, registration,
                  estimated, environmental (including Taxes under Code Section
                  59A), transfer, payroll, withholding, employment,
                  unemployment, social security taxes or premiums, or other
                  taxes of the same or similar nature, together with any
                  interest, penalties or additions thereon and estimated
                  payments thereof, whether disputed or not;

          (ii)    "TAX RETURN" or "TAX RETURNS" includes all returns, reports,
                  information returns, forms, declarations, claims for refund,
                  statements and other documents (including any amendments
                  thereto and including any schedule or attachment thereto) in
                  connection with Taxes that are required to be filed with a
                  Governmental Entity or other tax authority, or sent or
                  provided to another party under applicable Law, and all
                  citations of the Code or to the Treasury Regulations
                  promulgated thereunder will include any amendments or
                  successor provisions thereto;

          (iii)   "SELLERS' TAX PAYMENT COVENANTS" means, collectively, (A) the
                  covenants and agreements of the Sellers with respect to the
                  payment of Taxes contained in Section 5.2, (B) the covenants
                  and agreements of Autronics US with respect to the payment of
                  Taxes, including any indemnification agreements relating
                  thereto, set forth in the US Business Transfer Agreement; (C)
                  the covenants and agreements of P&G plc with respect to the
                  payment of Taxes, including without limitation any
                  indemnification agreements relating thereto, set forth in the
                  UK Business Transfer Agreement, and (D) the covenants and
                  agreements of Spirent GmbH with respect to the payment of
                  Taxes set forth in Section 5.2(D); and

                                      -34-
<Page>

          (iv)    "PURCHASER'S TAX PAYMENT COVENANTS" means, collectively, (A)
                  the covenants and agreements of the Purchaser with respect to
                  the payment of Taxes contained in Section 5.2, and (B) the
                  covenants and agreements of the Purchaser with respect to the
                  payment of Taxes, including any indemnification agreements
                  relating thereto, set forth in the US Business Transfer
                  Agreement and the UK Business Transfer Agreement.

     N.   JURISDICTION OF EXECUTION.

          (i)     The parties hereto hereby acknowledge and agree that the
Agreement, Additional Transfer Documents and Ancillary Agreements have all been
executed (to the extent executed by the parties) and delivered in the United
States of America and Sellers hereby further covenant and agree with Purchaser
that the original copies of the Agreement, the Additional Transfer Documents and
the Ancillary Agreements shall not be permitted to leave the jurisdiction of the
United States of America without the prior written consent of the Purchaser.
Notwithstanding the foregoing, the Sellers shall be entitled to remove the
original copies of the Agreement, the Additional Transfer Documents and the
Ancillary Agreements outside of the jurisdiction of the United States of America
without the prior written consent of the Purchaser in the event that such
removal is required for the Sellers to enforce any rights under the Agreement,
the Additional Transfer Documents and the Ancillary Agreements (and in which
case the Purchaser shall pay the stamp duty or other Taxes, if any, resulting
from such removal), provided the Sellers are then not in breach of Section 9.13.

          (ii)    The Purchaser acknowledges and agrees with the Sellers that
all UK stamp duty payable in connection with the Contemplated Transactions and
the execution and delivery of the Agreement, the Additional Transfer Documents
and the Ancillary Agreements shall be payable by the Purchaser. If in relation
to any action taken by or matter affecting the Sellers:

                  (A)    A judge, arbitrator or other Person responsible for the
          determination of any proceedings, whether in a tribunal or whether
          judicial, arbitral, administrative or otherwise requires or a Seller
          reasonably considers that such judge, arbitrator or other Person would
          require, that this Agreement, the Additional Transfer Documents or the
          Ancillary Agreements are stamped prior to such document being accepted
          as evidence in the proceedings before them; or

                  (B)    Any Governmental Entity (including any taxation
          authority) or any Person (acting within its powers) acting on behalf
          of a Governmental Entity requires the stamping of this Agreement, the
          Additional Transfer Documents or the Ancillary Agreements;

then the Purchaser agrees that and undertakes to the Sellers that it will pay
any stamp duty (and related interest or penalty charges) which may be payable on
this Agreement, the Additional Transfer Documents or the Ancillary Agreements.

     The Sellers shall use all reasonable endeavours to procure that the Persons
mentioned above accept unstamped copies of this Agreement, the Additional
Transfer Documents or the

                                      -35-
<Page>

     Ancillary Agreements. However, the obligation accepted by the Sellers under
this Section 5.2(N)(ii) shall not extend to incurring any cost, taking any
action against or appealing any decision of the relevant Person.

     If the Purchaser fails to comply with its obligations under this Section
5.2(N)(ii) the Sellers shall be entitled (but not obliged) to pay the relevant
stamp duty (and related interest and penalty charges) and the Purchaser shall be
obliged immediately on demand to pay to the Sellers an amount by way of
liquidated damages (on an after tax basis) equal to the amount paid by the
Sellers.

     O.   CERTAIN PAYMENT COVENANTS. The Sellers covenant with and undertake to
the Purchaser to pay the Purchaser an amount equal to:

          (i)     any Liability to repay in whole or in part any payment
                  received or receivable by the UK Companies or any liability of
                  the UK Companies to make any payment for the surrender of
                  Group Relief (within the meaning of Chapter IV Part X Income
                  and Corporation Taxes Act 1988) pursuant to any arrangement or
                  agreement entered into on or before the Closing Date; and

          (ii)    the loss in whole or in part of the right to receive any
                  payment for Group Relief from any company pursuant to any
                  arrangement or agreement entered into on or before the Closing
                  Date.

     P.   PRIORDISPOSITIONS OF ASSETS. The Sellers shall pay (a) the Taxes due
under Section 179 of the United Kingdom Taxation of Chargeable Gains Act 1992 as
a result of their transfer of the Penny & Giles sensors division from P&G plc to
P&G Controls UK on 1 January 1998; and (b) the Taxes incurred by or due from
Penny & Giles Studio Equipment Limited, a former Affiliate of P&G Controls UK,
relating to periods prior to May 7, 1998.

     Q.   CERTAIN VAT MATTERS REGARDING LEASE ASSIGNMENTS. It is hereby agreed
by the Purchaser that VAT is payable on the consideration paid or to be paid by
the Purchaser in respect of each of the Lease Assignments which shall be in
addition to, in each case, the consideration set out in the Lease Assignments.
The Purchaser hereby agrees to pay to Spirent plc all such VAT payable on each
and all of the Assignments and such payment of VAT shall be paid by the
Purchaser to Spirent plc on or before Friday 31 May 2002. Payment of such sums
shall be received in cleared funds in GB Sterling by Spirent plc by electronic
transfer so that Spirent plc shall receive such sum in its bank account before
2pm (GMT) on Friday 31 May 2002.

     Section 5.3  BOOKS AND RECORDS. Until the earlier of (i) the expiration of
the applicable statute of limitations (including periods of waiver) or (ii) six
(6) years after the Closing Date (or such longer period as may be required by
any Law or any ongoing Legal Proceeding), (1) the Purchaser shall cause the
Companies to maintain all books and records of the Companies material to the
Businesses; and (2) the Sellers shall maintain those books and records which (I)
are material to the US Business, the UK Business and the German Business and
(II) are not provided to Purchaser at or in connection with the Closing; in each
case with respect to the

                                      -36-
<Page>

period up to and including the Closing; and (3) the Purchaser and the Sellers,
respectively, shall permit the Sellers and the Purchaser, respectively, to have
reasonable access to such books, records and data for inspection and copying by
Sellers or Purchaser, respectively, or their respective duly authorized
representatives (at Sellers' or Purchaser's respective expense) upon reasonable
prior written notice, in connection with the preparation of financial reports,
Tax Returns, Tax Audits, the defense or prosecution of litigation, or any other
reasonable need of the Sellers or Purchaser, respectively, to consult such
records and data.

     Section 5.4  DISCHARGE OF LIABILITIES.

          A.      The Purchaser acknowledges that (1) any and all Liabilities of
the Companies at Closing shall continue to be Liabilities of such Companies
unaffected by the Closing and the Transfer of the Shares hereunder, and (2)
without limiting the foregoing, the Sellers are not retaining or assuming any
such Liabilities of the Companies; and the Purchaser covenants and warrants to
the Sellers that following the Closing all such Liabilities of the Companies
shall be paid, discharged and performed by the Companies in accordance with
their respective terms, and all US Liabilities, UK Liabilities and German
Liabilities shall be paid, discharged and performed by the Purchaser in
accordance with their respective terms.

          B.      With respect to any regularly recurring rents, water,
telephone, electricity or other utility charge which is imposed on a periodic
basis and is payable for a period that includes (but does not end on) the
Closing Date, the portion of such charge which relates to the portion of such
period ending on the Closing Date shall be deemed to be the amount of such
charge for such entire period multiplied by a fraction the numerator of which is
the number of days in such period ending on the Closing Date and the denominator
of which is the number of days in the entire such period. The Sellers shall pay
the amount so deemed to relate to the portion of such period prior to Closing,
and the Purchaser shall pay the amount so deemed to relate to the portion of
such period following Closing.

     Section 5.5  INSURANCE. To the extent that any of the Assets suffer damage
prior to the Closing or the Businesses suffer a Liability prior to the Closing,
and both: (a) such Asset or Liability is to be included in Closing Net Worth but
the Closing Net Worth does not reflect such damage or Liability; and (b) the
Sellers (but not the Purchaser or the Companies) are entitled to receive
insurance proceeds on account of such damage or Liability; then at the request
of the Purchaser the Sellers shall take commercially reasonable efforts to
collect such proceeds, and to pay such proceeds to the Purchaser, in each case
to the extent of the amount of such damage or Liability not so reflected in
Closing Net Worth; provided that such obligation of the Sellers shall only be
applicable if the Purchaser reimburses and indemnifies the Sellers from and
against any costs or expenses reasonably incurred in connection with such
collection and payment efforts (including the cost of any deductible).
Notwithstanding the foregoing, the Sellers may, but shall not be obligated to,
elect to pay the amount of such proceeds to which is entitled directly to the
Purchaser without obligation to collect the same under any such insurance
policy. Prior to the Closing, the Sellers shall and shall cause the Companies to
maintain (and not cancel) any insurance in place in the Ordinary Course of
Business under which any Company is an insured or

                                      -37-
<Page>

each of the Sellers is an insured with respect to the US Business, the UK
Business or the German Business, as the case may be.

     Section 5.6  EMPLOYEE/ERISA TRANSITION.

          A.      To the extent that any employee of one of the US Companies or
Autronics US has an outstanding loan under a US Company Plan as of Closing, the
Purchaser shall cause its Code Section 401(k) plan to accept and assume such
loan and allow for repayment under substantially similar terms and conditions.
In addition, the Purchaser and the Sellers agree that they shall reasonably
cooperate with each other with respect to the Sellers' termination of any US
Company Plans. Neither the Purchaser nor the Companies shall have any rights
under or with respect to any such US Company Plans terminated by the Sellers. To
the extent that any provision of this Section 5.6 or the Purchaser Employer
Indemnification is inconsistent with the provisions of the UK Business Transfer
Agreement, the provisions of the UK Business Transfer Agreement, and not this
Section 5.6 or the Purchaser Employer Indemnification, as the case may be, shall
apply to the UK Business Employees (as defined in the UK Business Transfer
Agreement).

     Life insurance will be offered without pre-existing condition only up to
the amount that transferred employees would have been covered under insurance
policies issued by the prior carriers. If the pre-existing condition was
satisfied under the prior carrier's policy then no pre-existing condition
requirement will be required under the Purchaser's plan. The Sellers will be
required to administer and be responsible for all COBRA requirements as
established by Law for all participants prior to the Closing. The Sellers agree
to fully vest all US transferred employees' Code Section 401(k) assets at 100%
at the Closing.

          B.      The Purchaser agrees that, under any employee benefit plan
made available or established by the Purchaser or P&G Controls US after the
Closing, employees of P&G Controls US and Autronics US will receive credit for
their years of service with P&G Controls US or Autronics US, as the case may be,
prior to the Closing in determining eligibility and vesting thereunder and in
determining the amount of benefits under any applicable sick leave, vacation or
severance plan. The Purchaser will cover employees of the US Companies and the
US Business as of the Closing under a group health plan and waive any
pre-existing condition limitations applicable to employees of the US Companies
or the US Business under any group health plan made available to employees of
the US Companies or the US Business to the extent that an employee's condition
would not have operated as a pre-existing condition limitation under any
applicable group health plan of or sponsored by the US Companies or Autronics US
prior to the Closing, and the Purchaser will take all action necessary to ensure
that employees of the US Companies and the US Business are given full credit for
all co-payments and deductibles incurred under any group health plan for the
year that includes the Closing Date.

          C.      If any Spirent Business Employee is neither employed nor
engaged by one of the Companies nor employed nor engaged by P&G plc wholly
engaged in the UK Business immediately before the Closing, then:

                                      -38-
<Page>

          (i)     the Sellers shall notify the Purchaser on or before the
     Closing Date that such Spirent Business Employee is not so employed or
     engaged;

          (ii)    the Purchaser may on or before the Closing Date make or cause
     the relevant Company to make an offer of employment or appointment to such
     Spirent Business Employee to employ or engage such Spirent Business
     Employee with effect from the Closing Date; and

          (iii)   the Sellers may terminate the employment or engagement of such
     Spirent Business Employee with immediate effect without notice or payment
     in lieu within 14 days after the offer in clause (ii) above being made or
     within 14 days after the Closing Date, whichever is later. If no offer is
     made under such clause (ii), the Sellers may terminate such Spirent
     Business Employee's employment or engagement within 14 days after the
     Closing Date with immediate effect without notice or payment in lieu.

As used herein, the term "Spirent Business Employee" means each and all of the
following people: Richard Strugnell, Chris Pritchard, Neil Parke, Joe Oatley,
Raymond New, David Taylor, and William Alfred Penny.

     D.   The Purchaser shall indemnify the Sellers in full for and against all
Liabilities whatsoever and howsoever arising incurred or suffered by any of the
Sellers in relation to the employment or engagement and/or the termination of
employment or engagement of the Spirent Business Employees and/or any other
event or occurrence in respect of the Spirent Business Employees at any time
before, on or after the Closing.

     E.   The Purchaser agrees that Stuart Boulton, Brian Robinson, Wendy Brown,
Todd Scott, Phil Larson and Norman Burkies, all of whom are, or will be at
Closing, employees of an Affiliate of a Seller (other than another Company)
shall be allowed to continue to utilize their existing work space at the UK
Lease Sites, at no rental charge, for a period of 12 months following Closing.
For as long as such persons are employed by a Seller or an Affiliate of the
Seller and continue to utilize such existing work space, the Sellers shall
indemnify the Purchaser for the Purchaser's Liability including its reasonable
costs or expenses caused by any non-compliance by such person with the
Purchaser's reasonable safety and operational requirements generally applicable
to the Purchaser's employees at the UK Lease Sites (provided such persons are
made aware of such requirements), and for the charges for long-distance phone
calls made by such persons from such work space. In connection therewith, to the
extent that any of the foregoing are currently employed by a Company or the UK
Business, the Sellers shall be entitled, prior to Closing, to transfer such
employment arrangement to an Affiliate of a Seller (and to the extent such
employment is transferred to another Seller, such arrangement shall not be
transferred to the Purchaser as part of the Contemplated Transactions); subject
to the Sellers' indemnification obligations set forth in the preceding sentence,
if and as applicable.

          F.      To the extent that any of the Sellers or the Companies are
obligated to pay life insurance premiums through age 65 for former employees of
P&G Controls or the UK

                                      -39-
<Page>

Businesses and who are pensioners of a Spirent pension plan, then the Sellers
following the Closing shall continue to pay these premiums in accordance with
such obligations.

          G.      The Sellers hereby covenant and agree to satisfy prior to or
promptly after Closing, all obligations to pay employee bonuses entitled to be
received by all employees in the Businesses attributable to periods ending on or
prior to Closing or which are due and payable as a result of the consummation of
the Contemplated Transactions; provided such bonuses are not reflected in
Closing Net Worth.

          Section 5.7 USE OF SPIRENT NAME. The Purchaser acknowledges that it is
not acquiring by reason of the Transfer of the Shares, the US Business, the UK
Business or the German Business hereby, any rights to use the name "Spirent" or
any other names, service marks or trademarks of the Sellers (other than, in the
case of such other names, service marks, or trademarks, those identified as
comprising Assets of the US Business, the UK Business and the German Business in
the Additional Transfer Documents); PROVIDED, HOWEVER, that following the
Closing the Companies, the US Business, the UK Business and the German Business
shall be entitled to use (a) the existing inventory of promotional material,
labels, packaging and nameplates with respect to products manufactured and sold
by Sellers prior to the Closing and bearing the Spirent name or any variation
thereof, and to sell existing inventory bearing the Spirent name, if any, and to
use existing signage, stationery, invoices and other office supplies bearing the
Spirent name, if any, in the Ordinary Course of their Businesses, provided that
(1) in the case of promotional materials only, such usage is terminated as soon
as is reasonably practical following the Closing Date; and (2) in the case of
all of the foregoing other than promotional materials: (A) from and after the
date which is 90 days following the Closing Date (subject to the succeeding
sub-clause (B)), the Spirent name is stickered over or otherwise deleted from
any of the foregoing; and (B) such usage does not, in any event, extend past the
date which is one hundred eighty (180) days following the Closing Date. The
parties agree that as a result of the transactions contemplated by this
Agreement and the Additional Transfer Documents, the Purchaser will thereby be
acquiring royalty free and unrestricted rights to use the names "Penny & Giles"
and "P&G." The Purchaser acknowledges that such rights are non-exclusive, in
that Spirent plc or its Affiliates have previously granted third parties certain
rights to use such names to the entities set forth on SCHEDULE 5.7, but Spirent
plc represents that such no such third party grantees are using such names in
any material commercial respect except as set disclosed on SCHEDULE 5.7; and
that such previous grants do not (A) materially impair the usage rights of the
Purchaser referred to in the preceding sentence; or (B) require any payments by,
or continuing obligations of, the Purchaser. Spirent plc agrees that neither it
nor its Affiliates will (a) after the Closing hold themselves out as doing
business under such names (provided that this covenant shall not prohibit
Spirent plc or such Affiliates from using existing stationery and other office
supplies bearing the Spirent name, if any, in the Ordinary Course of their
Businesses, but in no event past the date which is sixty (60) days following the
Closing Date); or (b) after the date hereof grant to any Person any rights to
use such names and in furtherance of the foregoing Spirent plc agrees that it
shall cause P & G plc to change its corporate name at or prior to the Closing
and to delete therefrom any reference to "Penny & Giles", "P&G" or any variation
thereof. Notwithstanding the foregoing, Spirent plc shall cause "Penny & Giles
Drives Technology Ltd," "Penny & Giles Drives Technology Division of Autronics
Corporation" and

                                      -40-
<Page>

"Penny & Giles Drives Technology Asia" to change its corporate name at or prior
to the Closing and to delete therefrom any reference to "Penny & Giles", "P&G"
or any variation thereof, provided that any such new corporate name may include
the letters "PG." The Purchaser hereto acknowledges that neither it nor the
Companies will have any rights from and after the Closing to create or maintain
any website links to or from any website of Spirent plc or its Affiliates. The
Sellers acknowledge they will not have any rights from and after the Closing to
create or maintain any website links to or from any website of any Company.

     Section 5.8  GUARANTEES. The Purchaser shall use best efforts to (a)
deliver on or prior to the Closing Date but effective as of the Closing,
Guaranty/Bond Replacements for each Guaranty or Bond listed on SCHEDULE 5.8; and
(b) procure, after the Closing, Guaranty/Bond Replacements for any Guaranty or
Bond not listed on SCHEDULE 5.8 and issued or obtained in the Ordinary Course of
Business prior to the Closing Date, with such Guaranty/Bond Replacements to be
so obtained as promptly as reasonably practicable after the Purchaser learns of
the same; provided that, in the case of this clause (b): (1) the procurement of
any such Guaranty/Bond Replacement shall not constitute a waiver of any breach
of this Agreement by the Sellers; and (2) the Purchaser shall not be required to
procure any such Guaranty/Bond Replacement following the Closing to the extent
that the same will result in more than $1,000 of cost or expense to the
Purchaser, unless the Sellers agree to reimburse the Purchaser for such cost or
expense. Pending such procurement as described in the foregoing clause (b)
(including if such procurement is not required by sub-clause (2) of the
foregoing clause (b)), the Purchaser shall indemnify the Sellers and each such
Non-Company Affiliate against all and any liabilities, losses, costs, charges,
proceedings, actions, claims, demands or expenses arising out of or in
connection with any such Guaranty or Bond.

          As used herein, the term "GUARANTY/BOND REPLACEMENT" means any
guaranties, bonds, consideration or other undertakings, as the case may be,
needed to replace and terminate any Guaranty or Bond and so as to obtain the
complete and unconditional release of the Sellers and any Non-Company Affiliates
from all obligations in connection with each such Guaranty or Bond.

          As used herein, the term "GUARANTY OR BOND" means any guaranty,
keepwell agreement, comfort letter, or similar undertaking issued prior to the
Closing Date to or for the benefit of, or any letter of credit, surety bond,
performance bond, customs bond, excise bond or similar undertaking obtained
prior to the Closing Date by, any Seller or any Non-Company Affiliate to support
or facilitate business transactions by a Company, the US Business, the UK
Business or the German Business, and any security furnished by a Seller or any
such Non-Company Affiliate in connection therewith.

          As used herein, the term "NON-COMPANY AFFILIATE" means any Affiliate
of any Seller or of any Company, but such term shall not include any Company.

     Section 5.9  INTERCOMPANY ACCOUNTS. All intercompany accounts or loans
between any Company, the US Business, the UK Business or the German Business, on
the one hand, and any Seller or other Affiliate (other than another Company) or
non-transferred employee, on the other

                                      -41-
<Page>

hand, shall be repaid, capitalized or otherwise eliminated by such Seller or
such Affiliate or such non-transferred employee, on the one hand, and such
Company, the US Business, the UK Business or the German Business, on the other
hand, as applicable, not later than as of the close of business on the Business
Day immediately preceding the Closing Date, except for trade payables and
receivables arising in the Ordinary Course of Business.

     Section 5.10 INDEMNIFICATION OF DIRECTORS AND OFFICERS. Following the
Closing, the Purchaser shall cause each Company to honor its obligations, if
any, to indemnify and advance defense costs to each present and former officer
or director of such Company pursuant to its Charter Documents and shall not
permit the Charter Documents of any Company to be amended for a period of six
years in a manner which materially adversely affects the indemnification rights,
if any, of present and former directors and officers of such Company, except as
required by applicable Laws or unless such obligations are fully covered by
insurance secured by Purchaser or such former officers or directors are fully
covered under comparable provisions of the Charter Documents of Affiliates of
Purchaser, or successors in interest of any Company, in either case during such
six year period, provided that the Purchaser or any such Affiliate, as
applicable, is reasonably comparable in financial strength and credit-worthiness
to such Company.

     Section 5.11 CONTACT WITH CUSTOMERS AND SUPPLIERS. After the date hereof
but prior to the Closing Date, except as specifically authorized herein, none of
the Purchaser or any of its agents, Affiliates, employees, directors or officers
shall contact or communicate with any employees, customers, suppliers or
licensors of any Company, the US Business, the UK Business or the German
Business in connection with the transactions contemplated hereby except with the
prior written consent of Spirent plc, which shall not be unreasonably withheld
or delayed.

     Section 5.12 ACCESS AND INVESTIGATION. Prior to the Closing, upon
reasonable notice from the Purchaser to the Sellers given in accordance with
this Agreement, the Sellers will afford to the officers, attorneys, accountants
or other authorized representatives of the Purchaser reasonable access during
normal business hours to the facilities, assets, books and records, and
management personnel of the Companies, Autronics US (to the extent relating to
the US Business), P&G plc (to the extent relating to the UK Business) Spirent
plc (with respect to the UK Lease Sites), and Spirent GmbH (to the extent
relating to the German Business), so as to afford the Purchaser a reasonable
opportunity to make, at its sole cost and expense, such additional review,
examination and investigation of the Companies, the Assets, the US Business, the
UK Business, and the German Business as the Purchaser may reasonably desire to
make; PROVIDED, HOWEVER, that the Purchaser shall not be permitted such access
to the extent that the Sellers or the Companies are prohibited from granting
such access pursuant to any Law, Order or rule of any regulatory body applicable
to any Seller or any Company wherever located. Sellers shall instruct their
accountants and advisers to reasonably cooperate with the Purchaser and to
provide Purchaser with reasonable access to such accountants (including their
work papers to the extent available to the Sellers) and advisers, all at
Purchaser's cost and expense. Whether or not the Closing occurs, the Purchaser
will, and will cause each of its Affiliates and authorized representatives to,
treat in confidence and not disclose any and all documents, materials and

                                      -42-
<Page>

other information disclosed by or on behalf of the Sellers, the Companies or any
of their respective Affiliates, whether before, during or after the course of
the negotiations leading to the execution of this Agreement or thereafter, in
accordance with that certain Confidentiality Agreement between the Sellers and
the Purchaser dated October 3, 2001 (the "CONFIDENTIALITY AGREEMENT"), provided
that if the Closing occurs, the Confidentiality Agreement shall no longer be
applicable to any such documents, materials or other information which relate to
the Companies or the Businesses, or which constitute Assets.

     Section 5.13 OPERATION OF THE BUSINESSES. Between the date of this
Agreement and the Closing, except as otherwise expressly provided in or
contemplated by this Agreement or waived or consented to by Purchaser in
writing, the Sellers shall cause the Companies to, and each of Autronics US, P&G
plc, Spirent plc (with respect to the UK Lease Sites) and Spirent GmbH shall:

          A.      conduct their respective Businesses only in the Ordinary
Course of Business;

          B.      use their commercially reasonable efforts to: (i) keep
available the services of the current officers, employees and agents of each
Company and of Autronics US (to the extent relating to the US Business), P&G plc
(to the extent relating to the UK Business) and Spirent GmbH (to the extent
relating to the German Business), and (ii) maintain the relations and good will
with suppliers, customers, landlords, creditors and others having material
business relationships with any Company, Autronics US (to the extent relating to
the US Business), P&G plc (to the extent relating to the UK Business), Spirent
plc (to the extent relating to the UK Lease Sites) and Spirent GmbH (to the
extent relating to the German Business);

          C.      confer with the Purchaser concerning operational and financial
matters regarding the Businesses which are of a material nature, it being
understood that, notwithstanding anything to the contrary herein, until the
Closing the Sellers and the Companies shall have sole authority to operate the
Businesses;

          D.      maintain all leased and owned real property comprising any of
the Assets in accordance with the Ordinary Course of Business;

          E.      not approve any new capital expenditure or other financial
commitment in excess of $100,000;

          F.      not dispose of or incur, create or assume any Lien, other than
Permitted Liens, on any individual capital asset of the Companies or the
Businesses if the greater of the book value or the fair market value of such
capital asset exceeds $100,000;

          G.      not incur any indebtedness for money borrowed (excluding trade
payables incurred in the Ordinary Course of Business or intercompany borrowings)
that constitutes a Liability of the Companies in excess of $100,000;

                                      -43-
<Page>

          H.      not permit any Company to (1) amend its Charter Documents, (2)
issue, sell, redeem or otherwise acquire any capital stock, bonds, debentures,
notes or other securities or grant any options (including any employee stock
options), warrants or other rights entitling any Person to require the issuance
or delivery of any capital stock, bonds, debentures, notes or other securities,
or (3) declare, or set aside for payment, any dividend to be paid subsequent to
the Closing Date;

          I.      shall not enter into any material transaction with any
Affiliate except on commercially reasonable terms and in the Ordinary Course of
Business;

          J.      not grant material salary or wage increases, or change or
amend any benefit plan covering transferred employees in any way that materially
changes the amount such employees are entitled to receive under such plan other
than pursuant to existing salary and wage plans except in the Ordinary Course of
Business; and

          K.      not take any action or otherwise omit to take any action which
                  would reasonably be expected to cause a breach of the Sellers'
                  representations, warranties, covenants and agreements herein
                  set forth.

PROVIDED, HOWEVER, that no provision of this Agreement (including Section 3.1(D)
and this Section 5.13) shall restrict the ability of any Company, Autronics US,
P&G plc or Spirent GmbH, on or prior to the close of the Business Day
immediately preceding the Closing Date, to distribute all or any portion of its
cash, cash equivalents and intercompany accounts receivable or use all or any
portion of its cash and cash equivalents. The Sellers shall, prior to the
Closing Date transfer to any Affiliate the capital stock of, the companies
listed on SCHEDULE 5.13.

     Section 5.14 NOTIFICATION. Between the date of this Agreement and the
Closing, the Sellers will promptly notify the Purchaser in writing if the
Sellers become aware of any fact or condition that causes or constitutes a
breach of any of the Sellers' representations and warranties as of the date of
this Agreement, or if the Sellers become aware of the occurrence after the date
of this Agreement of any fact or condition that would (except as expressly
required by this Agreement) cause or constitute a breach of any such
representation or warranty had such representation or warranty been made as of
the time of occurrence or discovery of such fact or condition. Should any such
fact or condition require any change in the Disclosure Schedule hereto if such
Disclosure Schedule were dated the date of the occurrence or discovery of any
such fact or condition, the Sellers will promptly deliver to the Purchaser a
supplement to the Disclosure Schedule (a "DISCLOSURE SUPPLEMENT") specifying
such change. No Material Supplement delivered pursuant to this Section 5.14
shall be deemed to cure any breach of any representation or warranty made in
this Agreement for the purposes of a determination by the Purchaser that the
conditions of Article VI shall have been met, but pursuant to Section 6.1(A), if
the Closing occurs, the Disclosure Schedule as so supplemented by a Material
Supplement shall be the Disclosure Schedule for all purposes under this
Agreement. A Disclosure Supplement other than a Material Supplement shall be
deemed to cure any breach of any representation or

                                      -44-
<Page>

warranty made in this Agreement for the purposes of a determination by the
Purchaser that the conditions of Article VI shall have been met.

     As used herein, the term "MATERIAL SUPPLEMENT" means a Disclosure
Supplement delivered by the Sellers to the Purchaser pursuant to this Section
5.14 and which discloses a fact or condition which is reasonably likely to
result in a Material Adverse Effect and has not previously been disclosed within
the Disclosure Schedule.

     Section 5.15 NO SOLICITATION OR NEGOTIATION. The Sellers will not, nor will
they authorize any Company or any other Affiliate or any officer, director or
employee of, or any investment banker, attorney or other advisor or
representative of, the Sellers or any Company or any Affiliate to, directly or
indirectly, solicit, initiate, or encourage any inquiries or proposals from any
Person (other than the Purchaser) relating to any transaction involving the sale
of all or any part of the Shares or the Businesses, other than sales of Assets
in the Ordinary Course of Business, or any merger, consolidation, business
combination, or similar transaction involving any Company (any such transaction,
a "COMPETING TRANSACTION") or participate in any discussions or negotiations
regarding, or furnish to any Person any information with respect to, any
Competing Transaction.

     Section 5.16 PUBLICITY. No press release or public announcement related to
this Agreement, or the transactions contemplated hereby, shall be issued or made
without the joint approval of Spirent plc and the Purchaser, unless required by
Law (in the reasonable opinion of counsel) or London Stock Exchange Limited, the
United Kingdom Panel on Mergers and Acquisitions, New York Stock Exchange or US
Securities and Exchange Commission or other Governmental Entity rule or
regulation, in which case Spirent plc and the Purchaser shall use reasonable
efforts to give the other the opportunity to review such press release or
announcement prior to publication and, where practicable, agree to the form and
wording of such release or announcement.

     Section 5.17 NON-COMPETITION AND NON-SOLICITATION. Prior to the third
anniversary of the Closing Date, the Sellers shall not engage in any Competitive
Business, and the Sellers shall cause their Affiliates not to, directly or
indirectly, own, manage, operate, engage in or control, anywhere in the world,
any Competitive Business; PROVIDED that this Section 5.17 shall not prevent any
of the Sellers or any of their respective Affiliates from (i) owning, solely as
an investment, publicly traded company securities issued by a Person engaged in
a Competitive Business so long as such Seller or Affiliate does not own or
control, in the aggregate, more than 15% of any class of such securities; or
(ii) acquiring or holding any interest in, or managing, operating or
controlling, any Person engaged in Competitive Business if less than 30% of the
total revenues attributable to such Person in the 12 months prior to such
acquisition, or the commencement of the management, operation or control of such
Person by any such Seller or Affiliate, arose out of or were related to such
Competitive Business.

     Prior to the third anniversary of the Closing Date, the Sellers shall not,
and the Sellers shall cause their Affiliates not to, solicit or attempt to hire
or retain any employee of Purchaser, except pursuant to a general solicitation
not aimed at the Purchaser's employees, provided this

                                      -45-
<Page>

covenant shall not prohibit the Sellers or any Affiliate of the Sellers from
hiring any person who leaves the employment of the Purchaser not in response to
a solicitation by the Sellers or their Affiliates.

     As used above, the term "COMPETITIVE BUSINESS" means each of the following
businesses: (1) the manufacture and sale of aerospace sensors and controls
hardware; and (2) the manufacture and sale of aerospace quick access recorders,
primary air data computers, crash protected flight recorders and cockpit voice
recorders; (3) the manufacture and sale of industrial sensors, industrial
joysticks, and industrial studio faders; (4) the manufacture and sale of
aerospace fire protection equipment including smoke detectors and associated
cockpit and control units; (5) the manufacture and sale of aerospace control
electronics including electronic flap controllers, data converter/concentration
units, engine overspeed detectors and sensors, torque sensors and current
detectors; and (6) the manufacture and sale of power supplies for
In-Flight-Entertainment (IFE) and military applications, but only to the extent
any such sales referred to in the foregoing clauses (1) through (6), inclusive,
are for military and commercial aircraft OEMs, aircraft operators or aircraft
suppliers; in each case as conducted as of the Closing Date by the US Business,
the UK Business and the German Business; provided, however, that the term
"Competitive Business" shall not include, in any event:

          (A)     the design, development or sale of software applications
     focused on operational performance, safety assurance, improved efficiency
     or customer service; or systems integration, implementation and consultancy
     services for such performance software products;

          (B)     the design, development or sale of aerospace maintenance,
     repair and overhaul (MRO) software packages;

          (C)     the design, development or sale of aerospace data acquisition,
     networking and display devices;

          (D)     the performance by Spirent Systems Wichita, Inc. under its
     contract with Gulfstream for the SSCVR, Part Number 89095-0031, and any
     follow on business relating to such contract; or

          (E)     the distribution or supply of hardware products manufactured
     by Persons which are not Affiliates of the Sellers, as part of any of the
     foregoing.

          If a final judgment of a court or tribunal of competent jurisdiction
determines that any term or provision contained in this Section 5.17 is invalid
or unenforceable, then the parties agree that the court or tribunal will have
the power to reduce the scope, duration or geographic area of the term or
provision, to delete specific words or phrases or to replace any invalid or
unenforceable term or provision with a term or provision that is valid and
enforceable and that comes closest to expressing the intention of the invalid or
unenforceable term or provision. This

                                      -46-
<Page>

Section 5.17 will be enforceable as so modified after the expiration of the time
within which the judgment may be appealed. This Section 5.17 is reasonable and
necessary to protect and preserve Purchaser's legitimate business interests and
the value of the Assets and to prevent any unfair advantage conferred on
Sellers.

     Section 5.18 FURTHER ASSURANCES. At any time and from time to time, Sellers
on the one hand, and Purchaser, on the other hand, shall promptly execute,
acknowledge and deliver any other assurances or documents reasonably requested
by the other, as the case may be, and necessary for it, as the case may be, to
satisfy its respective obligations hereunder or obtain the benefits contemplated
hereby. The Sellers shall pay over to the Purchaser, as promptly as reasonably
practical, any amounts received by the Sellers from account debtors in payment
of accounts receivable arising prior to Closing and constituting Assets.

     Section 5.19 CERTAIN MATTERS INVOLVING INTELLECTUAL PROPERTY. As soon as
practicable after the Closing Date, Sellers and the Purchaser will cooperate to
take, or cause to be taken, at the Purchaser's expense, all necessary steps to
record with the appropriate United States Governmental Entities the transfer
from the Sellers or any of their Affiliates, as the case may be, to the
Purchaser or other Person designated in writing to Spirent plc at least five (5)
days prior to the Closing Date, of all Intellectual Property previously
registered or patented in the United States and identified as such on SCHEDULE
3.1(G). As soon as practicable after the Closing Date, Sellers and the Purchaser
will cooperate to take, or cause to be taken, at the Purchaser's expense, all
necessary steps to record with the appropriate foreign Governmental Entities or
agents the transfer of all Intellectual Property previously registered or
patented in such jurisdictions and identified as such on SCHEDULE 3.1(G) and to
otherwise record or evidence Purchaser's or its designees' rights in and to such
Intellectual Property, including the filing or amendment of any registered user
certificates, licenses, agreements or similar documents.

     Section 5.20 TRANSITION SERVICES. Spirent plc shall provide the use of
Spirent plc's head office server for the purpose of maintaining the German
Business's global address book for a period of up to 1 month from the Closing
Date and at no cost to the Purchaser or the German Business. Spirent GmbH shall
provide, with respect to the German Business, such accounting, administrative
and human resource services as were provided prior to the Closing Date for a
period of up to six months from the Closing Date at a cost to the Purchaser of
$4,500 per month. The cost of such services will be paid to Spirent GmbH by the
Purchaser within 14 days of receipt from Spirent GmbH of the appropriate
invoice. For the avoidance of doubt Spirent GmbH shall not be required to assist
the Purchaser in respect of the hiring of any further employees for the German
Business in the period referred to above. The Purchaser shall use its best
commercially practicable efforts to replace the services provided by the Spirent
plc and Spirent GmbH with its own arrangements as soon as possible after the
Closing Date. In addition, the Purchaser shall cause the Companies to continue
to host the internet links for Spirent plc's Affiliates to the Companies'
current aerospace wide area network (WAN), at no charge, for three months
following the Closing.

                                      -47-
<Page>

                                   ARTICLE VI

           Conditions Precedent to the Purchaser's Obligation to Close

     The Purchaser's obligation to purchase the Shares, the US Business,
the UK Business and the German Business, and to take the other actions required
to be taken by the Purchaser at the Closing, is subject to the satisfaction, at
or prior to the Closing, of each of the following conditions (any of which may
be waived by the Purchaser, in whole or in part):

     Section 6.1  ACCURACY OF REPRESENTATIONS. The Sellers' representations
and warranties in this Agreement, taken as a whole, must have been materially
accurate as of the date of this Agreement, and must have been materially
accurate as of the Closing Date as if made on the Closing Date (provided that
with respect to any specific representations and warranties which are qualified
by materiality or Material Adverse Effect, the term "materially accurate" as
used in this sentence shall be deemed to be interpreted as "fully accurate");
and the Sellers' representation and warranty in Section 3.1(B)(ii) must have
been fully accurate as of the date of this Agreement, and must have been fully
accurate as of the Closing Date as if made on the Closing Date; in each case
giving effect to each Disclosure Supplement which is not a Material Supplement,
PROVIDED that if the Closing occurs, the Disclosure Schedule as so supplemented
by a Material Supplement shall be the Disclosure Schedule for all purposes under
this Agreement.

     Section 6.2  SELLERS' PERFORMANCE. Each of the covenants and obligations
that the Sellers are required to perform or to comply with pursuant to this
Agreement at or prior to the Closing must have been duly performed and complied
with in all material respects, and the Sellers must have executed and delivered
each of the documents required to be delivered by them, except to the extent
that any such failure to so perform, comply or deliver (other than for the
obligation to execute and deliver the Additional Transfer Documents and
Ancillary Agreements) does not (a) result in a Material Adverse Effect or (b)
substantially impair the Sellers' ability to satisfy their obligations hereunder
and under the Additional Transfer Documents and the Ancillary Agreements.

     Section 6.3  NO INJUNCTION. Since the date of this Agreement, there must
not be in effect any injunction or other Order issued by a court of competent
jurisdiction restraining or prohibiting the consummation of the transactions
contemplated by this Agreement, or in any Additional Transfer Document or any
Ancillary Agreement, including the Transfer of the Shares, the US Business, the
UK Business and the German Business (collectively, the "CONTEMPLATED
TRANSACTIONS").

     Section 6.4  CONSENTS. So long as the Purchaser shall have satisfied its
respective reasonable efforts promptly to obtain the consents listed on SCHEDULE
6.4 pursuant to Section 5.1(B)(2), each such consent must have been obtained and
must be in full force and effect; provided, however, that, with respect to any
such consent, other than the consents required for the transfer of the (i) UK
Lease Site Leases; and (ii) and the Autronics US lease; as identified on said
Schedule, this condition shall be deemed to have been satisfied with respect to
such consent even if such consent has not been so obtained (or is not in full
force and effect), provided that the

                                      -48-
<Page>

Sellers have complied with their obligations under Section 5.1(B)(2) with
respect to the relevant Commitment, claim or other Asset intended to be assigned
to Purchaser whose Transfer requires such consent; provided further, however,
that such condition shall be deemed to have been satisfied with respect to such
consent pursuant to the foregoing proviso of this Section 6.4 if the Sellers
elect to agree to indemnify, from and after the Closing, the Purchaser and the
Companies from and against all Liabilities, costs and expenses incurred by the
Purchaser or the Companies as a result of the Seller's failure to obtain such
consent (or to keep such consent in full force and effect). Such indemnification
obligation, if so elected, is referred to as the "Sellers' Consent
Indemnification."

     Section 6.5  NO PROHIBITION. The proposed Transfer of the Shares, the US
Business, the UK Business and the German Business contemplated hereunder will
not materially contravene, or materially conflict with, or result in a material
violation of any applicable Law or Order, provided that the Purchaser shall have
used commercially reasonable efforts with the Sellers to restructure such
Transfer in a manner which will not so contravene, conflict with or violate such
Law or Order, provided that the foregoing proviso shall not obligate the
Purchaser to agree to any such restructuring to the extent materially altering
the responsibilities, obligations or Liabilities of the Purchaser or the value
of the acquired Businesses or Assets, as determined by the Purchaser in the
Purchaser's reasonable discretion.

                                   ARTICLE VII

            Conditions Precedent to the Sellers' Obligation to Close

     The Sellers' obligation to sell the Shares, the US Business, the UK
Business and the German Business, and to take the other actions required to be
taken by the Sellers at the Closing, is subject to the satisfaction, at or prior
to the Closing, of each of the following conditions (any of which may be waived
by the Sellers, in whole or in part):

     Section 7.1  ACCURACY OF REPRESENTATIONS. The Purchaser's representations
and warranties in this Agreement, taken as a whole, must have been materially
accurate as of the date of this Agreement and must be materially accurate as of
the Closing Date as if made on the Closing Date; and the Purchaser's
representation and warranty in Section 4.1(B)(ii) must have been fully accurate
as of the date of this Agreement, and must have been fully accurate as of the
Closing Date as if made on the Closing Date.

     Section 7.2  PURCHASER'S PERFORMANCE. Each of the covenants and obligations
that the Purchaser is required to perform or to comply with pursuant to this
Agreement at or prior to the Closing must have been duly performed and complied
with in all material respects, and the Purchaser must have delivered each of the
documents required to be delivered by it, except to the extent that any such
failure to so perform, comply or deliver does not (a) result in a material
adverse effect on the Purchaser or (b) substantially impair the Purchaser's
ability to satisfy its obligations hereunder and under the Additional Transfer
Documents and Ancillary Agreements.

                                      -49-
<Page>

     Section 7.3  NO INJUNCTION. There shall not be in effect any injunction or
other Order issued by a court of competent jurisdiction restraining or
prohibiting the consummation of the Contemplated Transactions.

     Section 7.4  NO PROHIBITION. The proposed Transfer of the Shares, the US
Business, the UK Business and the German Business contemplated hereunder will
not materially contravene, or materially conflict with, or result in a material
violation of any applicable Law or Order, provided that the Sellers shall have
used commercially reasonable efforts with the Purchaser to restructure such
Transfer in a manner which will not so contravene, conflict with or violate such
Law or Order, provided that the foregoing proviso shall not obligate the Sellers
to agree to any such restructuring to the extent materially altering the
responsibilities, obligations or Liabilities of the Sellers, as determined by
the Sellers in the Sellers' reasonable discretion.

                                  ARTICLE VIII

                               Termination Events

     Section 8.1  TERMINATION EVENTS. This Agreement may, by notice given prior
to or at the Closing, be terminated:

          A.      by mutual consent of the Purchaser and the Sellers;

          B.      (i) by the Purchaser, if any of the conditions in Article VI
has not been satisfied as of the Closing or if satisfaction of any such
condition is or becomes impossible (other than through the failure of the
Purchaser to comply with its obligations under this Agreement) and the Purchaser
has not waived such condition at or before the Closing; or (ii) by the Sellers,
if any of the conditions in Article VII has not been satisfied as of the Closing
or if satisfaction of any such condition is or becomes impossible (other than
through the failure of the Sellers to comply with their obligations under this
Agreement) and the Sellers have not waived such condition at or before the
Closing; or

          C.      by either the Purchaser or the Sellers if the Closing has not
occurred (other than through the failure of any party seeking to terminate this
Agreement to comply fully with its obligations under this Agreement) on or
before July 1, 2002 or such later date as the parties may agree upon.

     Section 8.2  PROCEDURES FOR TERMINATION. In the event of termination by the
Sellers or the Purchaser pursuant to Section 8.1, written notice thereof shall
forthwith be given to the other party in accordance with Section 9.8, and the
Contemplated Transactions shall be terminated without further action by any
party. If the transactions contemplated by this Agreement are terminated as
provided herein, the Purchaser shall return to the Sellers all documents and
other materials received from the Sellers, the Companies and their respective
Affiliates, representatives and agents relating to the transactions contemplated
hereby, whether obtained before or after the execution hereof, along with all
copies of such documents and other materials; and the Purchaser shall return to
the Sellers or destroy all materials developed by the Purchaser

                                      -50-
<Page>

or any of its Affiliates, representatives or agents from any such documents or
other materials. All confidential information received by the Purchaser with
respect to the Sellers and their respective Affiliates shall be treated in
accordance with the terms of the Confidentiality Agreement, which, subject to
the last sentence of Section 5.12, shall remain in full force and effect
notwithstanding the termination of this Agreement.

     Section 8.3  EFFECT OF TERMINATION. If this Agreement is terminated
pursuant to Section 8.1, all further obligations of the parties under this
Agreement will terminate, except that the obligations in Section 5.16
(Publicity) and Section 9.7 (Expenses) of this Agreement, and the
Confidentiality Agreement, will survive notwithstanding such termination;
PROVIDED, HOWEVER, that nothing in this Section 8.3 shall be deemed to adversely
affect any terminating party's right to pursue all legal remedies available to
such party or to release any party from any liability for any breach of this
Agreement prior to such termination, which remedies and liability shall survive
such termination; PROVIDED FURTHER, HOWEVER, that if the Purchaser terminates
this Agreement under Section 8.1(b)(i) on the basis that the condition in
Section 6.1 has failed to have been satisfied given the facts or matters
disclosed in a Material Supplement, then such termination shall be Purchaser's
sole remedy, and neither the Sellers nor the Purchaser shall have any further
liability or obligation, with respect to the same.

                                   ARTICLE IX

                                  Miscellaneous

     Section 9.1  ENTIRE AGREEMENT. This Agreement (including the Disclosure
Schedule, the Additional Transfer Documents and the Ancillary Agreements)
supersedes any other agreement, whether written or oral, that may have been made
or entered into by any party or any of their respective Affiliates (or by any
director, officer or representative thereof) with respect to the subject matter
hereof. This Agreement (including the Disclosure Schedule, the Additional
Transfer Documents and the Ancillary Agreements) constitutes the entire
agreement of the parties hereto with respect to the matters provided for herein,
and there are no agreements or commitments by or among such parties or their
Affiliates with respect to the subject matter hereof except as expressly set
forth in this Agreement, the Disclosure Schedule, the Additional Transfer
Documents and the Ancillary Agreements.

     Section 9.2  AMENDMENTS. No amendment, modification or alteration of the
terms or provisions of this Agreement shall be binding unless the same shall be
in writing and duly executed by the Purchaser and the Sellers.

     Section 9.3  SUCCESSORS AND ASSIGNS. This Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted assigns. This Agreement may not be assigned by any
party without the prior written consent of the other parties; provided, however,
that Purchaser may assign any or all of its rights and obligations under this
Agreement, the Additional Transfer Documents or any Ancillary Agreement to any
direct or indirect wholly owned subsidiary, limited partnership, limited
liability company or

                                      -51-
<Page>

similar business entity without the consent of the other parties hereto but such
assignment shall not relieve the Purchaser of any of its obligations hereunder.

     Section 9.4  COUNTERPARTS. This Agreement may be executed and delivered in
two or more counterparts, each of which shall be deemed to be an original for
all purposes and all of which together shall constitute one and the same
instrument.

     Section 9.5  HEADINGS AND SECTION REFERENCES. The headings of the sections
and paragraphs of this Agreement are included for convenience only and are not
intended to be a part of, or to affect the meaning or interpretation of, this
Agreement. All Article and section references herein, unless otherwise clearly
indicated, are to Articles and sections within this Agreement.

     Section 9.6  WAIVER. No failure or delay by either the Purchaser or the
Sellers in exercising any right, power or privilege hereunder shall operate as a
waiver thereof; nor shall any single or partial exercise thereof preclude any
other or further exercise thereof or the exercise of any other right, power or
privilege. The rights and remedies herein provided are cumulative and not
exclusive of any rights or remedies otherwise provided by law.

     Section 9.7  EXPENSES. Except as otherwise specifically provided for in
this Agreement, any Additional Transfer Document or any Ancillary Agreement, the
Sellers and the Purchaser shall each pay all costs and expenses incurred by it
or on its behalf in connection with this Agreement and the Contemplated
Transactions, including fees and expenses of its own financial consultants,
accountants and counsel.

     Section 9.8  NOTICES. Any notice, request, instruction or other document to
be given under this Agreement by any party hereto to any other party shall be in
writing and delivered personally or sent by an internationally recognized
overnight courier service or by registered or certified mail, postage prepaid:

     If to any Seller, or to any Company prior to the Closing, to such party c/o
the Seller Agent, at the following address:

             Spirent International Incorporated
             1300 Veterans Memorial Highway
             Hauppauge, New York 11788
             USA
             Attn:  President

with copies to each of:

                                      -52-
<Page>

             Spirent plc
             Spirent House
             Crawley Business Quarter
             Fleming Way
             Crawley, West Sussex
             RH10 9QL
             United Kingdom
             Attn:    General Counsel;

             and

             Goulston & Storrs, P.C.
             400 Atlantic Avenue
             Boston, MA  02110-3333
             USA
             Attn:    Daniel R. Avery, Esq.

     If to the Purchaser, or to any Company following the Closing, to:

             Curtiss-Wright Flight Systems, Inc.
             3120 Northwest Boulevard
             Gastonia, N.C. 28052-1167
             Attn:    President

with a copy to:

             Curtiss-Wright Corporation
             1200 Wall Street West, Suite 501
             Lyndhurst, N.J. 07171
             Attn:    General Counsel

or at such other address for a party or as shall be specified by like notice.
Any notice that is delivered personally in the manner provided herein shall be
deemed to have been duly given to the Person to which it is directed upon actual
receipt by such party (or its agent for notices hereunder). Any notice that is
addressed as provided herein and mailed by registered or certified mail shall be
conclusively presumed to have been duly given to the Person to which it is
addressed at the close of business, local time of such party, on the fifth
calendar day after the day it is so placed in the mail. Any notice that is
addressed as provided herein and sent by an internationally recognized overnight
courier service shall be conclusively presumed to have been duly given to the
Person to which it is addressed at the close of business, local time of such
Person, on the next business day following its deposit with such courier service
for next day delivery.

                                      -53-
<Page>

     Section 9.9  GOVERNING LAW. Except as otherwise provided (a) with respect
to the Transfer of the UK Business pursuant to the provisions of the UK Business
Transfer Agreement; and (b) with respect to the Transfer of the German Business
pursuant to the provisions of the German Business Transfer Agreement; this
Agreement and the legal relations among the parties hereto shall be governed and
construed in accordance with the substantive Laws of the State of New York, USA,
without giving effect to the principles of conflict of laws thereof. Without
limiting the generality of the foregoing, all claims for indemnification under
Section 9.14 of this Agreement shall be governed by such Laws as aforesaid, even
if any such claim for indemnification relates to the UK Business or the German
Business.

     Section 9.10 SEVERABILITY. If any provisions hereof shall be held by any
court of competent jurisdiction to be illegal, void, or unenforceable, such
provisions shall be of no force and effect, but the illegality or
unenforceability shall have no effect upon, and shall not impair the
enforceability of, any other provision of this Agreement.

     Section 9.11 KNOWLEDGE. Whenever "to its knowledge," "known" "aware,"
"awareness," or a similar phrase is used with respect to any Seller to qualify a
representation or warranty of such Seller, the "knowledge" or "awareness" so
referred to shall be deemed to be the actual and conscious (and not
constructive) knowledge of the Named Individuals. As used above, the term "NAMED
INDIVIDUALS" means those individuals listed on SCHEDULE 9.11. Whenever "to its
knowledge," "known" or a similar phrase is used with respect to the Purchaser to
qualify a representation or warranty of the Purchaser, or as used in Section
4.1(F) and Section 9.14(C)(iii)(c), the "knowledge" so referred to shall be
deemed to be the actual and conscious (and not constructive) knowledge of David
Adams, Michael Denton, George Yohrling, Randy Kesterson, Frank Tartaglia, Al
Symonds, Jameel Barkat, Brian Freeman, Michelle Stalder, and Marcel Dubsky;
provided, however, that for purposes of Section 4.1(F) and Section
9.14(C)(iii)(c), such "knowledge" shall be deemed to exclude the knowledge of
any of the matters set forth in the "data room" made available, at the offices
of Goulston & Storrs. P.C., to the Purchaser in connection with this Agreement
or in any statement, representation or warranty or other information contained
in any offering memorandum, management presentation or any other document or
material provided by the Sellers or their representatives or agents to the
Purchaser or its Affiliates in connection with this Agreement.

     Section 9.12 RIGHTS OF THIRD PARTIES. Nothing expressed or implied in this
Agreement is intended or will be construed to confer upon or give any Person
other than the parties hereto and their respective successors and permitted
assigns any rights or remedies under or by reason of this Agreement or any
transaction contemplated hereby.

     Section 9.13 CONSENT TO JURISDICTION AND SERVICE OF PROCESS. Except as
otherwise provided with respect to the Transfer of the UK Business pursuant to
the provisions of the UK Business Transfer Agreement and with respect to the
Transfer of the German Business pursuant to the provisions of the German UK
Transfer Agreement, the Purchaser and each of the Sellers hereby irrevocably
consents that any legal action or proceeding against it under, arising out of,
or in any manner relating to this Agreement or any other agreement, document or
instrument arising out of or executed in connection with this Agreement shall be
brought only in a state or federal

                                      -54-
<Page>

court of competent jurisdiction located within the Southern District of New York
and in all appellate courts associated therewith. Each party by the execution
and delivery of this Agreement expressly and irrevocably consents and submits to
the personal jurisdiction of any of such courts in any such action or
proceeding. Each party hereby expressly and irrevocably waives any claim or
defense in any action or proceeding based on any alleged lack of personal
jurisdiction, improper venue, forum non conveniens, or any similar basis.

     Section 9.14 INDEMNIFICATION; SURVIVAL OF REPRESENTATIONS AND WARRANTIES.

          A.      INDEMNIFICATION BY SELLERS. Each Seller shall jointly and
severally indemnify, defend and hold harmless the Purchaser and its Affiliates
and their respective employees, officers, directors, stockholders, partners and
representatives from and against any losses, assessments, Liabilities, claims,
damages, costs and expenses (including reasonable attorneys' fees and
disbursements) incurred by such indemnified party as the result of:

          (1) any misrepresentation in, breach of or failure to comply with, any
of the representations, warranties, covenants or agreements of the Sellers
contained in this Agreement or any Additional Transfer Document or Ancillary
Agreement;

          (2) the Dorset Environmental Matter (as defined below);

          (3) any failure by the Sellers or their Affiliates to make the minimum
contributions to the Keystone Plans as required by Title IV of ERISA or Section
412 of the Code;

          (4) any and all debts payable by the UK Employer Companies or either
of them to the UK Company Plans or either of them which arise under section 75
of the United Kingdom Pensions Act 1995;

          (5) any and all claims for pensions or other relevant benefits (as
defined in section 612(1) of the United Kingdom Income & Corporation Taxes Act
1988) in respect of any current or former employees of the Penny & Giles group
of companies who were members of the Penny & Giles International Plc &
Associated Companies Pension & Assurance Scheme or who otherwise claim to be
entitled to benefits as set out in clause 9 of the main terms and conditions of
employment issued in February 1986 by Penny & Giles Transducers Limited insofar
as such claims relate to a promise made and service prior to Closing and insofar
as such pension or other relevant benefits will not be paid from either or both
of the UK Company Plans; or

          (6) any claims in respect of the exclusion prior to Closing of UK
Employee Companies from membership of the UK Company Plans for service prior to
October 1991 on the grounds of their part time employee status and for service
between October 1991 and 28 December 1994 on the grounds of earnings less than
the National Insurance lower earnings limit in breach of article 141 of the
Treaty of Rome or of any statute under the laws of the United Kingdom prior to
Closing;

                                      -55-
<Page>

and all such losses, assessments, Liabilities, claims, damages, costs and
expenses are referred to hereinafter as the "PURCHASER'S LOSSES."

     As used herein, the term "Dorset Environmental Matter" means the release or
alleged release of Hazardous Material on the car park at the 1 Airfield Road,
Christchurch, UK facility on Monday 3 December 2001, which resulted from damage
to a waste tank valve caused in connection with the removal by Linkwaste of
waste varnish from that facility.

          B.      INDEMNIFICATION BY THE PURCHASER. The Purchaser shall
indemnify, defend and hold harmless each Seller and its Affiliates and their
respective employees, officers, directors, stockholders, partners and
representatives from and against any losses, assessments, Liabilities, claims,
damages, costs and expenses (including reasonable attorneys' fees and
disbursements) incurred by such indemnified party as the result of:

          (1)     any misrepresentation in, breach of or failure to comply with,
any of the representations, warranties, covenants or agreements of the Purchaser
contained in this Agreement or any Additional Transfer Document or Ancillary
Agreement; or

          (2)     without limiting the generality of the foregoing, the failure
or alleged failure of the Companies to pay, discharge and perform, from and
after Closing, all Liabilities of the Companies, in accordance with their
respective terms, or the failure or alleged failure of the Purchaser to (a) pay,
discharge and perform all US Liabilities, UK Liabilities and German Liabilities
in accordance with their respective terms, (b) to perform its obligations
pursuant to Section 5.1 of the UK Business Transfer Agreement, Section 6.6 of
the UK Business Transfer Agreement, Section 7.1 of the UK Business Transfer
Agreement and Section 7.2 of the UK Business Transfer Agreement (the "Purchaser
Payment Indemnification");

          (3)     any failure or alleged failure by the Purchaser to cause the
Companies, the US Business, the UK Business and the German Business to continue
the employment of all employees (including with respect to US employees,
employees taking advantage of the Family and Medical Leave Act of 1993) of the
Companies, the US Business, the UK Business and the German Business employed at
Closing, on comparable terms and conditions to those applicable to such
employment immediately prior to the Closing, and otherwise in accordance with
all applicable Laws and other obligations (the "Purchaser Employment
Indemnification");

and all such losses, assessments, Liabilities, claims, damages, costs and
expenses are referred to hereinafter as the "SELLERS' LOSSES."

          C.      SURVIVAL; LIMITATIONS. Notwithstanding anything else in this
Agreement or any Additional Transfer Document or Ancillary Agreement to the
contrary:

                  (i)    Except as set forth in Section 9.14(C)(vi), the
representations and warranties of the Seller and the Purchaser, respectively,
under this Agreement and any Additional Transfer Document or Ancillary
Agreement, and any indemnification obligations

                                      -56-
<Page>

arising therefrom, shall survive the Closing and shall expire and terminate on
the date which is 18 months following the Closing Date; PROVIDED, HOWEVER, that
the Sellers' representations and warranties in Section 3.1(B)(ii), and the
Purchaser's representations and warranties in Section 4.1(B)(ii), shall expire
and terminate upon the Closing. The covenants of the parties shall expire in
accordance with their terms, and the indemnification obligations of the
Purchaser or the Seller, respectively, on account of the Special Indemnification
Obligations (as defined in Section 9.14(C)(ii), below) shall continue in full
force and effect following Closing (provided that the time limit applicable to
indemnification obligations relating to Section 3.1(N), the Sellers' Tax
Payment Covenant, the Purchaser's Tax Payment Covenant and Article IV of the UK
Business Transfer Agreement, as the case may be, shall be as set forth in
Section 9.14(C)(vi)), in each case subject to the other limitations of this
Section 9.14.

                  (ii)   The Sellers shall not have any indemnification
obligations under Section 9.14(A) or otherwise under this Agreement, and the
Purchaser shall not have any indemnification obligations under Section 9.14(B)
or otherwise under this Agreement: (a) except to the full extent that the
Purchaser's Losses, or the Sellers' Losses, respectively, with respect to any
individual claim or any related claims arising from the same or substantially
similar factual circumstances, exceed $15,000 (a "MATERIAL CLAIM"), in which
event such indemnification shall be required to the extent of such Purchaser's
Losses or the Sellers' Losses, respectively, including such $15,000 amount
(subject also to the limitations provided in succeeding clauses (b) and (c) of
this Section 9.14(C)(ii)); (b) except to the extent that the Purchaser's Losses,
or the Sellers' Losses, respectively, with respect to all such Material Claims
in the aggregate exceed $500,000 (the "INDEMNIFICATION THRESHOLD"), in which
event such indemnification shall be required only to the full extent of the
Purchaser's Losses or the Sellers' Losses, respectively, in excess of the
Indemnification Threshold (subject also to the preceding clause (a) and the
succeeding clause (c) of this Section 9.14(C)(ii)); and (c) to the extent that
the Purchaser's Losses in the aggregate, or the Sellers' Losses in the
aggregate, respectively, exceed $15,000,000 (the "CAP"), in which event such
indemnification shall be required only to the extent of the Purchaser's Losses
or the Sellers' Losses, respectively, below the Cap (subject also to the
preceding clauses (a) and (b) of this Section 9.14(C)(ii)); provided, however
that neither the limitation to Material Claims set forth in clause (a), above,
nor the Basket nor the Cap, shall apply to:

                         (1)  the Seller's indemnification obligations with
     respect to the Dorset Environmental Matter pursuant to Section 9.14(A)(2);

                         (2)  the Sellers' Consent Indemnification, if
     applicable under Section 6.4;

                         (3)  the Sellers' indemnification obligations with
     respect to the Keystone Plans pursuant to Section 9.14(A)(3);

                         (4)  the Sellers' indemnification obligations pursuant
     to Section 9.14(A)(4), Section 9.14(A)(5) and Section 9.14(A)(6);

                                      -57-
<Page>

                         (5)  the Sellers' indemnification obligations with
     respect to its covenants or agreements in Section 5.2(P) and Section
     5.4(B),

                         (6)  the Sellers' indemnification obligations with
     respect to its covenants or agreements in Section 5.6(E), Section 5.6(F)
     and Section 5.6(G);

                         (7)  the Purchaser's indemnification obligations with
     respect to the Purchaser Payment Indemnification pursuant to Section
     9.14(B)(2)

                         (8)  the Purchaser's indemnification obligations with
     respect to the Purchaser Employment Indemnification pursuant to Section
     9.14(B)(3);

                         (9)  the Purchaser's indemnification obligations with
     respect to its agreements and covenants in Section 5.1(B) of this Agreement
     and Section 6.4 of the UK Business Transfer Agreement;

                         (10) the Purchaser's indemnification obligations with
     respect to its covenants or agreements under Section 8.2 of the UK Business
     Transfer Agreement;

                         (11) the Purchaser's indemnification obligations with
     respect to its covenants or agreements under Section 10.1 of the UK
     Business Transfer Agreement and Section 10.2 of the UK Business Transfer
     Agreement; and

                         (12) the Purchaser's indemnification obligations with
     respect to its covenants or agreements in Section 5.2(N), Section 5.2 (Q),
     Section 5.4(A), Section 5.4(B) and Section 5.6(D), and in the last sentence
     of Section 5.2(G), and in Article 4 (Tax Provisions) of the UK Business
     Transfer Agreement.

          The indemnification obligations which are described in the foregoing
     clauses (1) through (12), inclusive, are referred to as the "Special
     Indemnification Obligations."

                  (iii)  (a)  With respect to any matter for which
indemnification has been provided hereunder, the Indemnitee (as defined below)
hereby covenants and agrees to use all commercially reasonable efforts to
collect amounts payable to the Indemnitee under any applicable insurance policy
of the Indemnitee, and any such amounts so paid to the Indemnitee shall reduce
the indemnification obligations of the Indemnitor (as defined below) with
respect to such matters.

                         (b)  The amount of Sellers' Losses or Purchaser's
Losses shall be calculated taking into account (and reducing such Sellers'
Losses or Purchaser's Losses to reflect) the Tax benefits, if any, inuring to
any such Indemnitee, on account of such Indemnitee's incurring the losses,
assessments, Liabilities, claims, damages, costs or expenses (including
reasonable attorneys' fees and disbursements) giving rise to such Sellers'
Losses or Purchaser's

                                      -58-
<Page>

Losses, respectively; provided that such Tax benefits, if any, shall be as
reasonably determined by the Indemnitee.

                         (c)  The Purchaser shall not be entitled to make a
claim for indemnification under this Section 9.14 for any breach by any Seller
of any covenant, representation or warranty set forth in this Agreement if the
Purchaser had actual knowledge of such breach prior to or at the Closing;
provided that this 9.14(C)(iii)(c) shall not apply to the Special
Indemnification Obligations.

                  (iv)   In no event shall Sellers' Losses or Purchaser's
Losses, as the case may be, include amounts arising from consequential, special,
exemplary, or punitive damages; provided that with respect to the Special
Indemnification Obligations only, Sellers' Losses or Purchaser's Losses, as the
case may be, on account of such Special Indemnification Obligations may include
amounts arising from consequential damages.

                  (v)    In no event shall this Section 9.14 require duplicative
payments or indemnities by the Sellers (in the case of Purchaser's Losses) or
the Purchaser (in the case of Sellers' Losses).

                  (vi)   No claim for indemnification by the Purchaser on
account of the Sellers' breach of the Sellers' Tax Payment Covenant or of
Section 3.1(N), and no claim for indemnification by the Sellers on account of
the Purchaser's breach of the Purchaser's Tax Payment Covenant, may be made
after the 60th day following the expiration of the applicable statutes of
limitations with respect to the Taxes in question, giving effect to any
extension thereof, provided that in relation to any obligation of the Sellers
hereunder in respect of UK Tax, such obligation shall remain in force for a
period of six (6) years from the end of the accounting period in which Closing
occurred, and if the UK, US or German tax authorities allege fraud or negligence
in the preparation of a Tax Return there shall be no time limit on the Sellers'
obligations with respect to the Sellers' Tax Payment Covenant or Section 3.1(N).

                  (vii)  The Sellers shall have no liability under this
Agreement (including under Section 3.1(N), Section 5.2 and Section 9.14(A)) in
relation to any Liability or matter to the extent that: (a) such matter or
Liability was included in the determination of Closing Net Worth or falls within
one of the categories of assets or liabilities to be included in Closing Net
Worth; or (b) such matter or Liability arises by reference to an event occurring
on or prior to December 31, 2001 and an amount is provided for such matter or
Liability in the Financial Statements for the year ending on December 31, 2001,
provided the limitation on such liability shall be restricted solely to the
amount so provided in such Financial Statements; or (c) such matter or Liability
arises after December 31, 2001 and in the Ordinary Course of the Businesses; or
(d) such matter or Liability has been discharged prior to Closing (provided that
this clause (d) shall not apply to the extent such discharge would reasonably be
expected to result in a Material Adverse Effect or otherwise materially impairs
the future operations of the Businesses); provided that the foregoing clauses
(b) and (c) of this 9.14(C)(vii) shall not apply to the Special Indemnification
Obligations.

                                      -59-
<Page>

                  (viii) No Indemnitor (as defined below) shall have any
indemnification obligations with respect to the indemnification obligations
described in clauses (1), (2), (3), (4), (6), (8), and (9) of Section
9.14(C)(ii) except to the extent that the Purchaser's Losses or Seller's Losses,
as the case may be, of the Indemnitee (as defined below) with respect thereto
arise as the result of a claim asserted by a third party (including a
Governmental Entity) which is not the Indemnitee or an Affiliate of the
Indemnitee (and which claim does not result from the actions of the Indemnitee
or such Affiliate, and in this regard each of the Sellers and the Purchaser, as
Indemnitee, agrees that neither it nor its Affiliates will take any actions
reasonably likely to result in any such third party claim). For purposes of the
foregoing in this Section 9.14(C)(viii), the term "Affiliate" shall not include
any officer, director or employee acting in their individual capacities.

                  (ix)   The parties acknowledge that the limitations set forth
in the preceding clauses (i), (ii), (iii), (iv), (v), (vi), (vii), and (viii) of
this Section 9.14(C) are not mutually exclusive, but rather are separate and
independent limitations, and that each and all such limitations may, alone or
together, apply to a party's indemnification obligations in accordance with
their respective terms.

          D.      Notwithstanding anything herein to the contrary, each party's
sole and exclusive remedy against any other party for any breach of a
representation, warranty, covenant or other obligation made in or imposed by
this Agreement or any Additional Transfer Document, or otherwise in connection
with the Transfer of the Shares, the US Business, the UK Business or the German
Business or the other transactions contemplated hereunder or under the
Additional Transfer Documents shall be a claim for indemnification under this
Section 9.14, subject to all of the limitations of this Section 9.14, including
under Section 9.14(C).

          E.      PROCEDURES.

                  (i)    In the event that any Legal Proceeding shall be
instituted with respect to which indemnification may be sought by one party
hereto from another party under the provisions of this Section 9.14, the party
seeking indemnification ("INDEMNITEE") shall, promptly after acquiring knowledge
of such Legal Proceeding, cause written notice in reasonable detail of such
Legal Proceeding which is covered by this indemnification to be forwarded to the
other party from which indemnification is being sought ("INDEMNITOR"), provided,
however, the failure to notify the Indemnitor will not relieve the Indemnitor of
any liability it may have to indemnify the Indemnitee except to the extent that
the Indemnitor's defense of such action, or any of the Indemnitor's rights with
respect to the same, including any rights under insurance or against any third
parties, is actually prejudiced or impaired by the Indemnitee's failure to give
such notice.

                  (ii)   In the event of the initiation of any such Legal
Proceeding against an Indemnitee, the Indemnitor shall have the absolute right
after the receipt of the notice described iI Section 9.14(E)(i), at its option
and at its own expense, to be represented by counsel of its choice, and (subject
to Section 9.14(E)(iii)) to defend against, negotiate, settle or otherwise deal
with any Legal Proceeding or demand that relates to any Purchaser's Losses or
Sellers' Losses, as the case may be, indemnified against hereunder, and, in such
event, the Indemnitee

                                      -60-
<Page>

will reasonably cooperate with the Indemnitor and its representatives in
connection with such defense, negotiation, settlement or dealings; PROVIDED,
HOWEVER, that the Indemnitee may directly participate in any such Legal
Proceeding so defended with counsel of its choice at its own expense.

                  (iii)  Without the prior written consent of the Indemnitee,
which shall not be unreasonably withheld, the Indemnitor will not enter into any
settlement of any third party claim which would lead to Liability or create any
financial or other obligation on the part of the Indemnitee which is not paid or
reimbursed in full by the Indemnitor on account of its indemnification
obligation hereunder; provided, however, notwithstanding anything herein
provided to the contrary, Indemnitee may refuse to consent to a settlement which
imposes continuing obligations on Indemnitee or involves any non-monetary
relief, does not result in a complete release of Indemnitee from any and all
Liability or involves a finding or admission of any violation of Legal
Requirements or any violation of the rights of any Person by Indemnitee. If a
firm offer is made to settle a third party claim without leading to Liability or
the creation of a financial or other obligation on the part of the Indemnitee
for which the Indemnitee is not entitled to indemnification hereunder and the
Indemnitor desires to accept and agree to such offer, the Indemnitor will give
written notice to the Indemnitee to that effect. If the Indemnitee notifies the
Indemnitor that it does not consent to such firm offer within ten (10) Business
Days after its receipt of such notice from the Indemnitor, the Indemnitee may
continue to contest or defend such third party claim and, in such event, the
maximum Liability of the Indemnitor as to such third party claim will not exceed
the amount of such settlement offer, plus the Purchaser's Losses or Sellers'
Losses, as the case may be, reasonably paid or incurred by the Indemnitee
through the end of such 10-Business Day period.

                  (iv)   After any final judgment or award shall have been
rendered by a Governmental Entity of competent jurisdiction, and the time in
which to appeal therefrom has expired, or a settlement shall have been
consummated, or the Indemnitee and the Indemnitor shall have arrived at a
mutually binding agreement with respect to each separate matter alleged to be
indemnified against by the Indemnitor hereunder, the Indemnitee shall forward to
the Indemnitor notice of any sums due and owing with respect to such matter, and
the Indemnitor shall pay all of the sums so owing to the Indemnitee by wire
transfer or certified or bank cashier's check within thirty (30) days after the
date of such notice.

                  (v)    A claim for indemnification for any matter not
involving a third party claim may be asserted by notice to the party from whom
indemnification is sought.

     Section 9.15 SELLER AGENT. Each of the Sellers does hereby irrevocably
appoint SII as its agent and attorney-in-fact to act on behalf of such Seller
with respect to the sale and transfer of the Shares, the Assets, the US
Business, the UK Business and the German Business hereunder, to act on behalf of
each Seller in any litigation or arbitration involving this Agreement or the
transactions contemplated hereby, and to act on behalf of each Seller for
purposes of any and all communications with the Purchaser, and SII hereby
accepts such appointment. The Purchaser shall be entitled to rely without
inquiry on any actions taken and any notices and communications given by SII on
behalf of any such Seller as being from such Seller directly.

                                      -61-
<Page>

     Section 9.16 CERTAIN DEFINITIONS AND INTERPRETATIVE MATTERS

          A.      DEFINITIONS. As used herein, the following terms have the
meanings set forth as follows:

          (1)     "AFFILIATE" means, with respect to any Person, any other
          Person controlling, controlled by, or under common control with, such
          first Person.

          (2)     "ASSETS" means, with respect to any Company, the properties
          and assets of such Company; and, with respect to the US Business, the
          UK Business and the German Business, the US Assets, the UK Assets and
          the German Assets, respectively, but excluding, in any event, the
          Excluded Business Assets.

          (3)     "COMPANIES" means, collectively: P&G Controls US; P&G Controls
          UK; and P&G Aerospace UK the term "COMPANY" means each of the
          foregoing individually.

          (4)     "DISCLOSURE SCHEDULE" means the Disclosure Schedule attached
          hereto, which Disclosure Schedule is incorporated herein and made a
          part hereof, fully as if the same were herein set forth in its
          entirety.

          (5)     "EXCLUDED BUSINESS ASSETS" means, collectively (a) the
          "Excluded Assets" as defined in the US Business Transfer Agreement and
          the "Excluded Assets" as defined in the UK Business Transfer
          Agreement; (b) any intercompany accounts or loans described in Section
          5.9, and any intercompany arrangements described on SCHEDULE 3.1(P)
          (other than the four Commitments described on Part C of such
          Schedule); (c) any insurance policies relating to the Businesses; (d)
          up to $100,000 in fixed assets utilized by the persons identified in
          Section 5.6(E) in connection with their employment; and the employment
          arrangements with such persons described in said section and (e) those
          other assets set forth on SCHEDULE 9.16(A)(5).

          (6)     "GAAP" means United Kingdom generally accepted accounting
          principles consistently applied with prior periods.

          (7)     "LAWS" means any foreign or domestic, federal, state,
          provincial, territorial, county or local constitution, statute, law,
          principle of common law, ordinance, rule, regulation, treaty or court
          or administrative order, decree, judgment or ruling.

          (8)     "LEGAL PROCEEDING" means any claim, action, suit, proceeding
          or investigation before any Governmental Entity, whether brought,
          initiated, asserted or maintained by a Governmental Entity or any
          other Person.

                                      -62-
<Page>

          (9)     "LIABILITIES" means all liabilities, claims, obligations,
          expenses or damages, whether known or unknown, fixed or contingent.

          (10)    "MATERIAL ADVERSE EFFECT" means a material adverse effect on
          the business and assets of any Company, the US Business, the UK
          Business and the German Business, in each case taken as whole,
          excluding any such effect resulting from the transactions contemplated
          hereby or relating to general economic conditions.

          (11)    "PERSON" means any individual, person, corporation, trust,
          partnership, limited liability company, unincorporated association,
          joint venture, Governmental Entity or other entity of any kind.

          B.      CROSS REFERENCES. The following defined terms are defined in
the respective Sections of this Agreement as set forth below:

                             Table of Defined Terms

<Table>
<Caption>
     --------------------------------------------------------------------------------------
                       TERM                                   SECTION DEFINED IN
     --------------------------------------------------------------------------------------
          <S>                                                   <C>
     --------------------------------------------------------------------------------------
                   Accounting Firm                                   1.3(B)
     --------------------------------------------------------------------------------------
            Additional Transfer Documents                            1.2(B)
     --------------------------------------------------------------------------------------
          Additional Intellectual Property                           3.1(G)
     --------------------------------------------------------------------------------------
           Adjusted Closing Balance Sheet                            1.3(B)
     --------------------------------------------------------------------------------------
                      Affiliate                                    9.16(A)(1)
     --------------------------------------------------------------------------------------
                      Agreement                                     Preamble
     --------------------------------------------------------------------------------------
                Ancillary Agreements                                 1.2(B)
     --------------------------------------------------------------------------------------
           Applicable Accounting Standards                           1.3(A)
     --------------------------------------------------------------------------------------
                       Assets                                      9.16(A)(2)
     --------------------------------------------------------------------------------------
                    Autronics US                                    Preamble
     --------------------------------------------------------------------------------------
                        aware                                         9.11
     --------------------------------------------------------------------------------------
                      awareness                                       9.11
     --------------------------------------------------------------------------------------
                 Benchmark Net Worth                                 1.3(E)
     --------------------------------------------------------------------------------------
                      Business                                     3.1(A)(ii)
     --------------------------------------------------------------------------------------
                    Business Day                                     1.3(A)
     --------------------------------------------------------------------------------------
                     Businesses                                    3.1(A)(ii)
     --------------------------------------------------------------------------------------
                         Cap                                       9.14(C)(ii)
     --------------------------------------------------------------------------------------
                      Cash Plan                                   3.1(K)(ii)(2)
     --------------------------------------------------------------------------------------
                   Cash Plan Rules                              3.1(K)(ii)(2)(C)
     --------------------------------------------------------------------------------------
                  Charter Documents                                3.1(B)(iii)
     --------------------------------------------------------------------------------------
                       Closing                                       2.1(a)
     --------------------------------------------------------------------------------------
                Closing Balance Sheet                                1.3(A)
     --------------------------------------------------------------------------------------
                    Closing Date                                     2.1(a)
     --------------------------------------------------------------------------------------
                  Closing Net Worth                                  1.3(A)
     --------------------------------------------------------------------------------------
                        Code                                      3.1(K)(i)(2)
     --------------------------------------------------------------------------------------
</Table>

                                      -63-
<Page>

<Table>
<Caption>
     --------------------------------------------------------------------------------------
                        TERM                                   SECTION DEFINED IN
     --------------------------------------------------------------------------------------
         <S>                                                  <C>
                     Commitments                                    3.1(E)(i)
     --------------------------------------------------------------------------------------
                      Companies                                    9.16(A)(3)
     --------------------------------------------------------------------------------------
                       Company                                     9.16(A)(3)
     --------------------------------------------------------------------------------------
                Competing Transaction                                 5.15
     --------------------------------------------------------------------------------------
                Competitive Business                                  5.17
     --------------------------------------------------------------------------------------
              Confidentiality Agreement                               5.12
     --------------------------------------------------------------------------------------
              Contemplated Transactions                                6.3
     --------------------------------------------------------------------------------------
                    Consideration                                    5.2(F)
     --------------------------------------------------------------------------------------
           December 31, 2001 Balance Sheet                          3.1(C)(i)
     --------------------------------------------------------------------------------------
                 Disclosure Schedule                               9.16(A)(4)
     --------------------------------------------------------------------------------------
                Disclosure Supplement                                 5.14
     --------------------------------------------------------------------------------------
             Dorset Environmental Matter                             9.14(A)
     --------------------------------------------------------------------------------------
                  Environmental Law                               3.1(J)(c)(i)
     --------------------------------------------------------------------------------------
                   ERISA Affiliate                               3.1(K)(B)(i)(2)
     --------------------------------------------------------------------------------------
                        ERISA                                     3.1(K)(i)(1)
     --------------------------------------------------------------------------------------
              Excluded Business Assets                             9.16(A)(5)
     --------------------------------------------------------------------------------------
                Financial Statements                                3.1(C)(i)
     --------------------------------------------------------------------------------------
                        GAAP                                       9.16(A)(6)
     --------------------------------------------------------------------------------------
                    German Assets                             Sixth WHEREAS Clause
     --------------------------------------------------------------------------------------
                   German Business                                 3.1(A)(ii)
     --------------------------------------------------------------------------------------
         German Business Transfer Agreement                        1.2(A)(iv)
     --------------------------------------------------------------------------------------
                 German Liabilities                           Sixth WHEREAS Clause
     --------------------------------------------------------------------------------------
                    German Plans                                   3.1(K)(iii)
     --------------------------------------------------------------------------------------
                 Governmental Entity                               3.1(B)(iii)
     --------------------------------------------------------------------------------------
                  Guaranty or Bond                                     5.8
     --------------------------------------------------------------------------------------
              Guaranty/Bond Replacement                                5.8
     --------------------------------------------------------------------------------------
                 Hazardous Material                               3.1(J)(c)(ii)
     --------------------------------------------------------------------------------------
              Indemnification Threshold                            9.14(C)(ii)
     --------------------------------------------------------------------------------------
                     Indemnitee                                    9.14(E)(i)
     --------------------------------------------------------------------------------------
                     Indemnitor                                    9.14(E)(i)
     --------------------------------------------------------------------------------------
                Intellectual Property                               3.1(G)(i)
     --------------------------------------------------------------------------------------
                   Keystone Plans                                3.1(K)(B)(i)(2)
     --------------------------------------------------------------------------------------
                      knowledge                                       9.11
     --------------------------------------------------------------------------------------
                        known                                         9.11
     --------------------------------------------------------------------------------------
                        Laws                                       9.16(A)(7)
     --------------------------------------------------------------------------------------
                  Lease Assignments                                 1.2(A)(v)
     --------------------------------------------------------------------------------------
                    Leased Realty                                   3.1(F)(i)
     --------------------------------------------------------------------------------------
                  Legal Proceeding                                 9.16(A)(8)
     --------------------------------------------------------------------------------------
                     Liabilities                                   9.16(A)(9)
     --------------------------------------------------------------------------------------
                      Licenses                                     3.1(E)(iii)
     --------------------------------------------------------------------------------------
                        Lien                                       3.1(A)(iii)
     --------------------------------------------------------------------------------------
</Table>

                                      -64-
<Page>

<Table>
<Caption>
     --------------------------------------------------------------------------------------
                         TERM                                      SECTION DEFINED IN
     --------------------------------------------------------------------------------------
        <S>                                                  <C>
                       Losses                                        9.14(B)
     --------------------------------------------------------------------------------------
               Material Adverse Effect                             9.16(A)(10)
     --------------------------------------------------------------------------------------
                   Material Claim                                  9.14(C)(ii)
     --------------------------------------------------------------------------------------
                 Material Commitment                                 3.1(E)
     --------------------------------------------------------------------------------------
                 Material Supplement                                  5.14
     --------------------------------------------------------------------------------------
                  Named Individuals                                   9.11
     --------------------------------------------------------------------------------------
                      Net Worth                                      1.3(E)
     --------------------------------------------------------------------------------------
                Non-Company Affiliate                                  5.8
     --------------------------------------------------------------------------------------
                        Order                                       3.1(B)(i)
     --------------------------------------------------------------------------------------
             Ordinary Course of Business                           3.1(C)(ii)
     --------------------------------------------------------------------------------------
                        OSHA                                         3.1(H)
     --------------------------------------------------------------------------------------
                        Owner                                      3.1(A)(ii)
     --------------------------------------------------------------------------------------
                  P&G Aerospace UK                            Fourth WHEREAS Clause
     --------------------------------------------------------------------------------------
                   P&G Controls UK                            Third WHEREAS Clause
     --------------------------------------------------------------------------------------
                   P&G Controls US                            First WHEREAS Clause
     --------------------------------------------------------------------------------------
                       P&G plc                                      Preamble
     --------------------------------------------------------------------------------------
                    P&G UK Shares                             Fourth WHEREAS Clause
     --------------------------------------------------------------------------------------
                   Permitted Liens                                  3.1(F)(i)
     --------------------------------------------------------------------------------------
                       Person                                      9.16(A)(11)
     --------------------------------------------------------------------------------------
                   Purchase Price                                   1.2(B)(i)
     --------------------------------------------------------------------------------------
                      Purchaser                                     Preamble
     --------------------------------------------------------------------------------------
        Purchaser Employment Indemnification                       9.14(B)(2)
     --------------------------------------------------------------------------------------
          Purchaser Payment Indemnification                        9.14(B)(3)
     --------------------------------------------------------------------------------------
                 Purchaser's Losses                                  9.14(A)
     --------------------------------------------------------------------------------------
                Purchaser's Objection                                1.3(B)
     --------------------------------------------------------------------------------------
          Purchaser's Tax Payment Covenants                        5.2(M)(iv)
     --------------------------------------------------------------------------------------
                  Relevant Members                              3.1(K)(ii)(2)(A)
     --------------------------------------------------------------------------------------
                  Relevant Reliefs                                  5.2(L)(i)
     --------------------------------------------------------------------------------------
                       Seller                                       Preamble
     --------------------------------------------------------------------------------------
                       Sellers                                      Preamble
     --------------------------------------------------------------------------------------
          Sellers' Consent Indemnification                             6.4
     --------------------------------------------------------------------------------------
                   Sellers' Losses                                   9.14(B)
     --------------------------------------------------------------------------------------
               Sellers' Review Period                                1.3(B)
     --------------------------------------------------------------------------------------
           Sellers' Tax Payment Covenants                          5.2(M)(iii)
     --------------------------------------------------------------------------------------
                       Shares                                Seventh WHEREAS Clause
     --------------------------------------------------------------------------------------
                         SII                                        Preamble
     --------------------------------------------------------------------------------------
              Spirent Business Employee                          3.1(K)(B)(i)(2)
     --------------------------------------------------------------------------------------
                    Spirent GmbH                                    Preamble
     --------------------------------------------------------------------------------------
                     Spirent plc                                    Preamble
     --------------------------------------------------------------------------------------
                  Spirent UK Shares                           Third WHEREAS Clause
     --------------------------------------------------------------------------------------
                     Staff Plan                                   3.1(K)(ii)(2)
     --------------------------------------------------------------------------------------
</Table>

                                      -65-
<Page>

<Table>
<Caption>
     --------------------------------------------------------------------------------------
                         TERM                                      SECTION DEFINED IN
     --------------------------------------------------------------------------------------
           <S>                                                <C>
                  Staff Plan Rules                              3.1(K)(ii)(2)(B)
     --------------------------------------------------------------------------------------
                     Subsidiary                                    3.1(A)(ii)
     --------------------------------------------------------------------------------------
                         Tax                                        5.2(M)(i)
     --------------------------------------------------------------------------------------
                     Tax Return                                    5.2(M)(ii)
     --------------------------------------------------------------------------------------
                     Tax Returns                                   5.2(M)(ii)
     --------------------------------------------------------------------------------------
                        Taxes                                       5.2(M)(i)
     --------------------------------------------------------------------------------------
                  to its knowledge                                    9.11
     --------------------------------------------------------------------------------------
                      Transfer                                         1.1
     --------------------------------------------------------------------------------------
                      UK Assets                               Fifth WHEREAS Clause
     --------------------------------------------------------------------------------------
                     UK Business                                   3.1(A)(ii)
     --------------------------------------------------------------------------------------
           UK Business Transfer Agreement                         1.2(A)(iii)
     --------------------------------------------------------------------------------------
                    UK Companies                                    3.1(A)(i)
     --------------------------------------------------------------------------------------
                     UK Company                                     3.1(A)(i)
     --------------------------------------------------------------------------------------
                  UK Company Plans                                3.1(K)(ii)(1)
     --------------------------------------------------------------------------------------
                UK Employer Companies                           3.1(K)(ii)(2)(A)
     --------------------------------------------------------------------------------------
                   UK Lease Sites                                  3.1(A)(ii)
     --------------------------------------------------------------------------------------
                   UK Liabilities                             Fifth WHEREAS Clause
     --------------------------------------------------------------------------------------
                 UK Pension Schemes                               3.1(K)(ii)(2)
     --------------------------------------------------------------------------------------
                      UK Shares                                    3.1(A)(ii)
     --------------------------------------------------------------------------------------
                      US Assets                               Second WHEREAS Clause
     --------------------------------------------------------------------------------------
                     US Business                                   3.1(A)(ii)
     --------------------------------------------------------------------------------------
           US Business Transfer Agreement                          1.2(A)(ii)
     --------------------------------------------------------------------------------------
                  US Company Plans                                3.1(K)(i)(1)
     --------------------------------------------------------------------------------------
                 UK Lease Site Lease                               3.1(A)(ii)
     --------------------------------------------------------------------------------------
                   US Liabilities                             Second WHEREAS Clause
     --------------------------------------------------------------------------------------
                      US Shares                               First WHEREAS Clause
     --------------------------------------------------------------------------------------
</Table>

     C.   CERTAIN INTERPRETIVE MATTERS. Unless the context otherwise requires,
(i) each accounting term not otherwise defined in this Agreement has the meaning
assigned to it in accordance with GAAP, (ii) "or" is disjunctive but not
necessarily exclusive, (iii) all words used in this Agreement will be construed
to be of such gender or number as the circumstances require, (iv) unless
otherwise expressly provided, the word "including" does not limit the preceding
words or terms and shall mean "including without limitation", (v) the words
"herein", "hereunder" and words of similar import shall refer to this Agreement,
(vi) all references to $ or dollar amounts mean lawful currency of the United
States of America. No provision of this Agreement will be interpreted in favor
of, or against, any of the parties hereto by reason of the extent to which any
such party or its counsel participated in the drafting thereof or by reason of
the extent to which any such provision is inconsistent with any prior draft
hereof or thereof.

     D.   DISCLOSURE SCHEDULES. The disclosure of any matter in any Disclosure
Schedule shall also qualify the representations and warranties contained in
Sections of this Agreement

                                      -66-
<Page>

other than the Section to which such Schedule specifically relates only to the
extent that it provides on its face a reasonable correlation to the subject
matter of such other Sections or otherwise provides a cross-reference to such
other Section (or to the Schedule specifically relating to such other Section).
Because of the different jurisdictions in which the Companies, the UK Business
and the German Business are located, and because of the different management
teams having day-to-day responsibility for the operations of the Companies, the
UK Business and the German Business, information contained in the Disclosure
Schedule was collected and is organized in separate sets included in the
Disclosure Schedule. Although the Sellers have endeavoured to prepare the
schedules comprising the Disclosure Schedule in a consistent manner, some of the
schedules differ in format or style according to local practice in the
jurisdictions where particular Companies, the UK Business and the German
Business are located. The disclosure of any matter in any schedule shall
expressly not be deemed to constitute an admission by the Sellers, or to
otherwise imply, that any such matter is material for the purposes of this
Agreement or that any other schedule (or set of schedules) is incomplete by
virtue of the omission of such disclosure.

                         [Signatures Begin on Next Page]

                                      -67-
<Page>

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date and year first written above.

                         [SIGNATURE BLOCKS TO BE ADDED]

                                      -68-
<Page>

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the
date first set forth above.

                                   PURCHASER:
                                   Curtiss-Wright Flight Systems, Inc.

                                   /s/ George J. Yohrling
                                   --------------------------------
                                   By:  George J. Yohrling
                                   Its: President

                                   SELLERS:

                                   Spirent International Incorporated

                                   --------------------------------
                                   By:
                                   Its:

                                   Autronics Corporation

                                   --------------------------------
                                   By:
                                   Its:

                                   Spirent plc

                                   --------------------------------
                                   By:
                                   Its:

                                   Penny & Giles International plc

                                   --------------------------------
                                   By:
                                   Its:

                                   Spirent GmbH

                                   --------------------------------
                                   By:
                                   Its:

<Page>

IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the
date first set forth above.

                                   PURCHASER:
                                   Curtiss-Wright Flight Systems, Inc.

                                   ----------------------------
                                   By:
                                   Its:

                                   SELLERS:

                                   Spirent International Incorporated

                                   /s/ Daniel Avery
                                   ----------------------------
                                   By:  Daniel Avery
                                   Its: Attorney in fact under Power of Attorney
                                        dated February 17, 2002

                                   Autronics Corporation

                                   /s/ Daniel Avery
                                   ----------------------------
                                   By:  Daniel Avery
                                   Its: Attorney in fact under Power of Attorney
                                        dated February 17, 2002

                                   Spirent plc

                                   /s/ Daniel Avery
                                   ----------------------------
                                   By:  Daniel Avery
                                   Its: Attorney in fact under Power of Attorney
                                        dated February 19, 2002

                                   Penny & Giles International plc

                                   /s/ Daniel Avery
                                   ----------------------------
                                   By:  Daniel Avery
                                   Its: Attorney in fact under Power of Attorney
                                        dated February 19, 2002

                                   Spirent GmbH

                                   /s/ Daniel Avery
                                   ----------------------------
                                   By:  Daniel Avery
                                   Its: Attorney in fact under Power of Attorney
                                        dated February 2002

<Page>

                                  Appendix A-1
                         US Business Transfer Agreement

                       ASSIGNMENT AND ASSUMPTION AGREEMENT

     ASSIGNMENT AND ASSUMPTION AGREEMENT, dated [CLOSING DATE], 2002, by and
between _____________, a _______________ with a mailing address at __________
(the "Purchaser"), and Autronics Corporation, a Delaware corporation with a
mailing address at c/o Spirent International Incorporated, 1300 Veterans
Memorial Highway, Hauppauge, New York 11788 34 (the "Seller").

     WHEREAS, the Seller is engaged in, among other things, the business of
designing, manufacturing and selling electronic engine controls, flap
controllers, power supplies for military and in flight entertainment, airborne
fire detection equipment and sensors/monitors, in each case for the commercial
aerospace and defense industries and as conducted as of the date hereof by the
Seller through its "Aerospace" division (such business, the "US Business," and
such products so designed, manufactured and sold, the "Business Products"); and

     WHEREAS, the Purchaser, on the one hand; and the Seller; Spirent plc; Penny
& Giles International plc; and Spirent GmbH, on the other hand; have entered
into that certain Stock and Asset Purchase Agreement (together with all
Appendices, Schedules, exhibits, Ancillary Agreements and other documents
executed and delivered in connection therewith, the "Purchaser Agreement"),
dated as of February 19, 2002 (and capitalized terms used but not defined herein
shall have the meanings assigned thereto within the Purchase Agreement); and

     WHEREAS, pursuant to the Purchase Agreement the Seller desires to convey,
sell, transfer and assign to the Purchaser, and the Purchaser desires to
purchase from the Seller, certain to the assets relating to the US Business,
including goodwill, and the Purchaser is willing to assume certain of the
Liabilities of the Seller relating to the US Business, all on the terms and
conditions hereinafter set forth; and

     NOW, THEREFORE, in consideration of the mutual covenants hereinafter set
forth, and for other good and valuable consideration, the receipt and adequacy
of which are hereby acknowledged, the parties hereto agree as follows:

                                       -1-
<Page>

                                    ARTICLE I

                           Purchase and Sale of Assets

     Section 1.1    SALE OF US ASSETS.

     A.   US ASSETS. Subject to the terms and conditions set forth in this
Agreement, the Seller does hereby sell, transfer, convey, assign and set over
("Transfer") to the Purchaser, and the Purchaser does hereby purchase and
acquire from the Seller, free and clear of all Liens other than Permitted Liens,
all of the Seller's right, title and interest in and to all of its assets, real,
personal or mixed, tangible and intangible, of every kind and description,
wherever located, and including goodwill, held or owned by Seller and used in or
relating to the US Business, including without limitation the following (but
only to the extent the following are so used in or relating to the US Business),
but excluding in any event the Excluded Assets (all such assets so Transferred
are hereinafter collectively referred to as the "US Assets"):

          1.   RECEIVABLES. (a) All trade accounts receivable and other rights
to payment and the full benefit of all security for such accounts or rights to
payment, including all trade accounts receivable representing amounts receivable
in respect of goods shipped or arising out of the sale or lease of the Business
Products or the rendering of services by the Seller and (b) any claim, remedy or
other right related to any of the foregoing ("Receivables").

          2.   FIXED ASSETS. All machinery, equipment, tools, leasehold
improvements, business machines, computer and communications hardware, vehicles,
parts, supplies, loose tools, fittings, stationery, spares, materials,
furniture, furnishings, plant and office equipment and other fixed assets or
tangible personal property (other than Inventories) of every kind owned or
leased by Seller (wherever located and whether or not carried on Seller's
books), together with any express or implied warranty by the manufacturers or
sellers or lessors of any item or component part thereof and all maintenance
records and other documents related thereto.

          3.   INVENTORY. All inventories, wherever located, including raw
materials, parts, engineering stores, work in process, packaging and promotional
material, goods held for sale, returns, repairs, finished goods and
manufacturing, administrative and other supplies or stock-in-trade owned by the
Seller for resale as or within Business Products or for use or consumption in
the production or sale of the Business Products.

          4.   COMMITMENTS. All contracts, agreements, consensual obligations,
promises or undertakings (whether written or oral and whether express or
implied) whether or not legally binding, of the Seller ("Business Commitments")
and all outstanding offer or solicitations made by or to Seller to enter into
any Business Commitment.

                                       -2-
<Page>

          5.   INTANGIBLE RIGHTS AND INTELLECTUAL PROPERTY. All of the
intangible rights and property of Seller, including, without limitation,
intellectual property owned or licensed (as licensor or licensee) by Seller in
which Seller has a proprietary interest, including, without limitation,
licenses, patents, registered and unregistered copyrights, rights in computer
software, designs and drawings, topography rights, engineering and manufacturing
documents, technical manuals, database rights, patterns, processes, formulae,
data, signs, know-how, trade secrets, registered and unregistered trademarks,
service marks and trade names, business names, inventions and discoveries
(whether patentable or not), computer software, telephone, telecopy and e-mail
addresses and listings, all rights in internet web sites and internet domain
names presently used by Seller, all rights in mask works, and other similar
rights held or used by the Seller, and all applications therefor and
registrations thereof, and all rights or forms of protection of a similar or
corresponding nature in any part of the world or having equivalent or similar
effect to any of these which may subsist whether registered or not or capable of
registration or not, including without limitation all proprietary information of
the Seller (collectively, the "Intellectual Property") and all rights to sue for
past, present and future infringement or other violations of the Intellectual
Property, and all going concern value and goodwill associated with any of the
foregoing.

          7.   LEASES. The leasehold interests of the Seller as tenant at the
property known as 12701 Schabarum Avenue, Irwindale, California (the "Lease").
To further evidence of the Transfer of the Seller's interest in the Lease to the
Purchaser, the parties hereto are entering into an Assignment of Lease as of the
date hereof.

          8.   PERMITS AND LICENSES. All permits, licenses, registrations,
approvals, consents and authorizations issued, granted, given or otherwise made
available by or under the authority of any Governmental Entity or other Person
or pursuant to any Laws and held or used by the Seller and all pending
applications therefor or renewals thereof.

          9.   RECORDS. All books, records, data and other information that is
inscribed on a tangible medium or that is stored in an electronic or other
medium and is retrievable in perceivable form, including computer or
machine-readable material ("Records") including, without limitation, client and
customer lists and Records, referral sources, research and development reports
and Records, production reports and Records, service and warranty Records,
equipment logs, operating guides and manuals, financial and accounting Records,
creative materials, advertising materials, promotional materials, studies,
reports, correspondence and all information and know-how (whether or not
confidential and in whatever form held), data, technical knowledge, methodology
and financial, commercial, trade and business secrets and other similar
documents and Records, and subject to Laws, copies of all personnel Records and
other Records relating to employees.

          10.  CLAIMS. All rights and claims of Seller against third parties
relating to the US Assets or the Business, whether choate or inchoate, known or

                                       -3-
<Page>

unknown, contingent or uncontingent, including (without limitation) all
manufacturers' and suppliers' warranties and representations.

          11.  DEPOSITS. All rights of Seller relating to deposits and prepaid
expenses, claims for refunds and rights to offset in respect thereof.

     B.   EXCLUDED ASSETS. Notwithstanding anything contained in this Agreement
to the contrary, the following assets of the Seller (the "Excluded Assets") are
not included in the US Assets:

          1.   NON-BUSINESS ASSETS. Any assets of the Seller (a) that are used
or held by the Seller primarily in connection with its businesses, operations or
activities other than the US Business; or (b) constitute "Excluded Business
Assets" as defined in the Purchase Agreement.

          2.   SELLER'S MINUTE BOOKS. The Seller's corporate record book, minute
books, stock record books and corporate seal.

          3.   INSURANCE. Any policies of insurance, whether or not relating to
the US Business or the Assets.

          4.   PENSION PLAN, ETC. The assets and related rights, title, and
interest of the Seller's benefit plans and other funded benefit arrangements,
including without limitation any such Section 401(k), medical or Section 125
plan.

          5.   TAX REFUNDS. Any federal or state income tax refund relating to
Taxes paid by Seller for any period prior to Closing.

          6.   CASH. Any cash in hand and/or at the bank(s) used in the US
Business;

          7.   INTERCOMPANY ARRANGEMENTS. Any contractual or other rights under
any agreements, contracts or arrangements between the Seller and its Affiliates,
(other than trade Receivables owing from Affiliates and incurred in the Ordinary
Course of Business) ("Intercompany Arrangements").

          8.   SPIRENT AND OTHER NAMES. Any rights to use the name "Spirent" or
"Bowthrope." The Seller hereby agrees that promptly after Closing it shall
change its corporate name to a name which does not contain the word "Autronics"
(or any variation thereof) and neither it nor any of its Affiliates will after
the Closing hold themselves out as doing business under the name "Autronics"
(provided that such covenant shall not prohibit the Seller or such Affiliates
from using existing stationery and other office supplies bearing the name
"Autronics", if any, in the ordinary course of their businesses, but in no event
past the date which is sixty (60) days following the date hereof).

                                       -4-
<Page>

                                   ARTICLE II

                            Assumption of Liabilities

     Section 2.1.   ASSUMPTION. As consideration of the Transfer of Assets under
Section 1.1 above, effective the close of business on the Closing Date the
Purchaser does hereby assume and agree to pay, perform and discharge in
accordance with their terms, all of the US Liabilities.

     Section 2.2.   DEFINITION OF US LIABILITIES. As used herein the terms "US
Liabilities" means any and all liabilities, claims, obligations, expenses or
damages, whether known or unknown, of the Seller which relate to the US Business
or the US Assets, whether arising before or after the date hereof, including
without limitations (1) any trade or other payables incurred in connection with
the US Business; (2) any obligations under Business Commitments; but such term
shall not include any such liabilities, claims, obligations, expenses or damages
arising under Intercompany Arrangements (other than ordinary course trade
payables owing to Affiliates of the Seller).

                                   ARTICLE III

                               General Provisions

     Section 3.1.   CONSIDERATION AND CLOSING. The consideration for the US
Assets shall be paid, and the purchase and sale transactions contemplated hereby
("Contemplated Transactions") shall be consummated, in accordance with the
provisions of the Purchaser Agreement.

     Section 3.2.   DEFINITIONS; REPRESENTATIVES AND WARRANTIES; COVENANTS;
CONDITIONS TO CLOSING; AND INDEMNIFICATION. The definitions (except as otherwise
expressly set forth herein); the respective representations and warranties of
the parties hereto with respect to the parties hereto, the US Business, the US
Assets and the US Liabilities, the respective covenants of the parties hereto;
the respective conditions of the parties hereto to Closing of the Contemplated
Transactions, and the indemnification provisions set forth in the Purchase
Agreement are hereby incorporated by reference and are repeated herein and made
a part hereof as if set forth herein.

     Section 3.3.   ENTIRE AGREEMENT. This Agreement, along with the Purchase
Agreement, supersedes any other agreement, whether written or oral, that may
have been made or entered into by any party or any of their respective
Affiliates (or by any director, officer or representative thereof) with respect
to the subject matter hereof. This Agreement along with the Purchase Agreement
constitutes the entire agreement of the parties hereto with respect to the
matters provided for herein, and there are no agreements or commitments by or
among such parties or their Affiliates with respect to the subject matter hereof
except as expressly set forth in this Agreement and the Purchase

                                       -5-
<Page>

Agreement. In the event of any conflict between the provisions of this Agreement
and the provisions of the Purchase Agreement, the provisions of the Purchase
Agreement shall control.

     Section 3.4.   CONTROLLING LAW AND VENUE. This Agreement and the legal
relations among the parties hereto shall be governed and construed in accordance
with the substantive Laws of the State of New York, USA, without giving effect
to the principles of conflict of laws thereof. Each of the Purchaser and the
Seller hereby irrevocably consents that any legal action or proceeding against
it under, arising out of, or in any manner relating to this Agreement or any
other agreement, document or instrument arising out of or executed in connection
with this Agreement shall be brought only in a state or federal court of
competent jurisdiction located within the Southern District of New York and in
the appellate courts thereof. Each party by the execution and delivery of this
Agreement expressly and irrevocably consents and submits to the personal
jurisdiction of any of such courts in any such action or proceeding. Each party
hereby expressly and irrevocably waives any claim or defense in any action or
proceeding based on any alleged lack of personal jurisdiction, improper venue,
forum non conveniens, or any similar basis.

     Section 3.5.   AMENDMENTS. No amendment, modification or alteration of the
terms or provisions of this Agreement shall be binding unless the same shall be
in writing and duly executed by the Purchaser and the Seller.

     Section 3.6.   SUCCESSORS AND ASSIGNS. This Agreement shall inure to the
benefit of and be binding upon the parties hereto and their respective
successors and permitted assigns. This Agreement may not be assigned by any
party without the prior written consent of the other party, provided that either
party may assign this Agreement to an Affiliate, provided further than any such
assignment to an Affiliate shall not relieve the assigning party of its
liability or obligations hereunder or under the Purchase Agreement.

     Section 3.7.   COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed to be an original for all purposes
and all of which together shall constitute one and the same instrument.

     Section 3.8.   HEADINGS AND SECTION REFERENCES. The headings of the
sections and paragraphs of this Agreement are included for convenience only and
are not intended to be a part of, or to affect the meaning or interpretation of,
this Agreement. All section references herein, unless otherwise clearly
indicated, are to sections within this Agreement.

     Section 3.9.   WAIVER. No failure or delay by either the Purchaser or the
Seller in exercising any right, power or privilege hereunder shall operate as a
waiver thereof; nor shall any single or partial exercise thereof preclude any
other or further exercise thereof or the exercise of any other right, power or
privilege. The rights and remedies herein provided are cumulative and not
exclusive of any rights or remedies otherwise provided by law.

                                       -6-
<Page>

     Section 3.10.  NOTICES. Any notice, request, instruction or other document
to be given under this Agreement by any party hereto to any other party shall be
in writing and delivered personally or sent by an internationally recognized
overnight courier service or by registered or certified mail, postage prepaid,
to the address of the recipient party as first set forth above, with copies
(a) in the case of the Seller, to each of (1) Spirent plc, Spirent House,
Crawley Business Quarter, Fleming Way, Crawley, West Sussex, RH10 9QL, United
Kingdom, Attn:General Counsel; and (2) Goulston & Storrs, P.C., 400 Atlantic
Avenue, Boston, MA 02110-3333, USA; Attn: Daniel R. Avery, Esq.; and (b) in the
case of the Purchaser, Curtiss-Wright Corporation, 1200 Wall Street West, Suite
501, Lyndhurst, N.J. 07171, Attn; General Counsel, or at such other address for
a party or as shall be specified by like notice. Any notice that is delivered
personally in the manner provided herein shall be deemed to have been duly given
to the party to which it is directed upon actual receipt by such party (or its
agent for notices hereunder). Any notice that is addressed as provided herein
and mailed by registered or certified mail shall be conclusively presumed to
have been duly given to the party to which it is addressed at the close of
business, local time of such party, on the fifth calendar day after the day it
is so placed in the mail. Any notice that is addressed as provided herein and
sent by an internationally recognized overnight courier service shall be
conclusively presumed to have been duly given to the party to which it is
addressed at the close of business, local time of such party, on the next
business day following its deposit with such courier service for next day
delivery.

     Section 3.11.  INVALIDITY. If at any time provision of this Agreement is or
becomes illegal, invalid or unenforceable in any respect under the law of any
jurisdiction, that shall not affect or impair.

            (i)     the legality, validity or enforceability in that
                    jurisdiction of any other provision of this Agreement; or

            (ii)    the legality, validity or enforceability under the law of
                    any other jurisdiction of that or any other provision of
                    this Agreement.

     IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of
the date and year first written above.

                           AUTRONICS CORPORATION

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

                                       -7-
<Page>

                           [PURCHASER NAME]

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

                                       -8-
<Page>

                                  APPENDIX A-2

                           UK ASSET PURCHASE AGREEMENT

THIS AGREEMENT is made on                                                  2002

BETWEEN

(1)  PENNY & GILES INTERNATIONAL PLC of Spirent House, Crawley Business Quarter,
     Fleming Way, Crawley, West Sussex RH10 9QL (registered in England under
     company number 688533) ("P&G PLC"); and

(2)  CURTISS-WRIGHT FLIGHT SYSTEMS, INC. of 3120 Northwest Boulevard, Gastonia,
     N.C, 28052-1167, USA, a Delaware Corporation ("PURCHASER")

BACKGROUND

A    All defined terms shall, unless otherwise defined herein, bear the same
     meanings as set out in an agreement of even date herewith and made among
     the Purchaser(1), Spirent International Incorporated(2), Spirent plc(3),
     P&G plc(4), and Spirent GmbH(5)("MASTER AGREEMENT");

B    This Agreement is pursuant to and ancillary to the Master Agreement
     governing the sale of the Shares, the sale of the UK Business and the sale
     of the German Business (as such terms are defined in the Master Agreement);

C    P&G plc is the owner of the UK Business and the UK Assets (both as defined
     in this Agreement);

D    The UK Business is operated on behalf of P&G plc by P&G Aerospace UK as its
     agent pursuant to an agreement dated 31 March 1996 between P&G plc and P&G
     Aerospace UK;

E    P&G plc has, as part of the sale terms contained in the Master Agreement,
     agreed to sell, convey, transfer and assign to the Purchaser and the
     Purchaser has agreed to buy, the UK Business and the UK Assets as a going
     concern on the terms set out in this Agreement.

NOW IT IS AGREED as follows:

1.   INTERPRETATION

     1.1    In this Agreement and the schedules to it:

            "AGENCY AGREEMENT" means an agreement dated 31 March 1996 between
            P&G plc and P&G Aerospace UK under which P&G Aerospace UK carries on
            the UK Business as agent for P&G plc;

            "CLOSING" shall have the meaning set out in section 2.1 of the
            Master Agreement;

<Page>

            "EXCLUDED ASSETS" shall mean any other right, asset or interest
            which is not a UK Asset and/or those assets set out in clauses
            2.1.11 to 2.1.16 of this Agreement;

            "INTELLECTUAL PROPERTY" means patents, trademarks and service marks,
            rights in designs, trade or business names or signs, know-how,
            copyrights (including rights in computer software) and topography
            rights (whether or not any of these is registered and including
            applications for registration of any such thing), database rights,
            and all rights or forms of protection of a similar nature or having
            equivalent or similar effect to any of these which may subsist;

            "THIRD PARTY CONSENT" or "THIRD PARTY CONSENTS" means all consents,
            approvals, authorizations or waivers required from third parties for
            the transfer, assignment or novation of any UK Contract in favour of
            the Purchaser;

            "TRANSFER REGULATIONS" means the Transfer of Undertakings
            (Protection of Employment) Regulations 1981 as amended or re-enacted
            from time to time;

            "UK ASSETS" means all of P&G plc's right, title and interest in and
            to all assets, real, tangible and intangible, of every kind and
            description of the UK Business listed in clauses 2.1.1 to 2.1.10 of
            this Agreement (inclusive) but, for the avoidance of doubt,
            excluding in any event the Excluded Assets;

            "UK BUSINESS" means the manufacture, service, sale and distribution
            of air data computing and test equipment, data recording and
            sensing-related equipment, and the environmental testing of
            aerospace products, each as carried on as of the date hereof at the
            UK Site on behalf of P&G plc by P&G Aerospace UK (through its
            "Aerospace division") as its agent pursuant to the Agency Agreement;

            "UK BUSINESS EMPLOYEES" means those persons employed by P&G plc who
            are wholly or mainly engaged in connection with the UK Business and
            including but without limitation those whose names are listed in
            schedule 1 to this Agreement;

            "UK BUSINESS GOODWILL" means all the goodwill of P&G plc in relation
            to the UK Business, together with the right of the Purchaser to
            trade under the UK Business Name and represent itself as carrying on
            the UK Business in succession to P&G Aerospace UK;

            "UK BUSINESS INTELLECTUAL PROPERTY" means all Intellectual Property
            owned by P&G plc and used primarily (which term, "primarily" shall
            mean material for the operation of the UK Business as it is
            currently carried on) in the UK Business but excluding, for the
            avoidance of doubt, all of the Sellers' right, title and interest in
            and to the "SPIRENT" AND "BOWTHORPE" trade marks and names;

<Page>

            "UK BUSINESS NAME" means "PENNY & GILES" or any name or sign
            including the word "P&G" used in connection with or in the context
            of the UK Business;

            "UK BUSINESS PLANT AND MACHINERY" means all the plant, machinery,
            leasehold improvements, equipment, computer and communication
            hardware, loose tools, fittings, furniture, furnishings,
            partitioning, books, stationery, vehicles, spares and other goods
            owned by P&G plc in relation primarily (which term, "primarily"
            shall mean material for the operation of the UK Business as it is
            currently carried on) to the UK Business and used in the UK Business
            (excluding for the avoidance of doubt any assets, plant, equipment,
            machinery, computer and communication equipment, loose tools,
            fittings, furniture, partitioning, books, stationery, vehicles,
            spares and other goods of the Companies and/or The Flight Data
            Company Limited whether or not situate on the UK Site and excluding
            also the UK Business Stocks);

            "UK BUSINESS RECORDS" means:

            (i)     all books, records, data and other information that is
                    inscribed on a tangible medium or that is stored in an
                    electronic or other medium and is retrievable in perceivable
                    form, including computer or machine-readable material of
                    P & G plc belonging or related primarily (which term,
                    "primarily" shall mean material for the operation of the UK
                    Business as it is currently carried on) to the UK Business,
                    including, without limitation, client and customer lists and
                    records, referral sources, research and development reports
                    and records, production reports and records, service and
                    warranty records, equipment logs, operating guides and
                    manuals, financial and accounting records, creative
                    materials, advertising materials, promotional materials,
                    studies, reports, correspondence and all information and
                    know-how (whether or not confidential and in whatever form
                    held), data, technical knowledge, methodology and financial,
                    commercial, trade and business secrets relating primarily
                    (which term, "primarily" shall mean material for the
                    operation of the UK Business as it is currently carried on)
                    to the UK Business and other similar documents and records
                    and, subject to Laws, copies of all personnel records and
                    other records relating primarily (which term, "primarily"
                    shall mean material for the operation of the UK Business as
                    it is currently carried on) to employees and employee
                    benefit plans held on the Closing Date; and

            (ii)    all records of P&G plc in connection with the UK Business
                    relating to VAT required to be preserved by virtue of
                    paragraph 6 of Schedule 11 of the VAT Act;

            "UK BUSINESS STOCKS" means all inventories and stocks of raw
            materials, parts, engineering stores, work-in-progress, finished
            goods

<Page>

            or completed services and other stock-in-trade and packaging and
            promotional material held by P&G plc on the Closing Date and used
            primarily (which term, "primarily" shall mean material for the
            operation of the UK Business as it is currently carried on) in
            relation to the UK Business but excluding for the avoidance of doubt
            all stocks of raw materials, engineering stores, work-in-progress,
            finished goods or completed services and other stock-in-trade and
            packaging and promotional material owned or belonging to the
            Companies and/or The Flight Data Company Limited whether or not
            situate at the UK Site;

            "UK CLAIMS" means all rights including rights of set off and claims
            of the Sellers against third parties to the extent it relates to the
            UK Assets or the UK Business, whether known or unknown, contingent
            or uncontingent, including (without limitation) all manufacturers'
            and suppliers' warranties and representations excluding, for the
            avoidance of doubt (i) all claims and rights covered by policies of
            insurance of the Sellers, (ii) all insurance benefits, including
            rights and proceeds arising from or relating to the UK Assets, the
            UK Business or the UK Liabilities and (iii) any rights or claims not
            covered by paragraphs (i) or (ii) above but which are covered by the
            terms of Section 5.5 of the Master Agreement;

            "UK CONTRACTS" means all the contracts, agreements or obligations
            whether written or oral including all amendments thereto current on
            the Closing Date to which any Seller is a party, or under which any
            Seller has any outstanding right, liability or obligation, in each
            case relating to the UK Business (including without limitation any
            agency and/or distributorship agreements);

            "UK DEBTS" means all payments (including all trade accounts
            receivables and other rights to payment and the full benefit of all
            security for such accounts or rights to payment, including all
            amounts receivable in respect of goods shipped) relating to the UK
            Business and due to any of the Sellers for goods or services
            supplied by or on behalf of P&G plc in the ordinary course of
            carrying on the UK Business;

            "UK LIABILITIES" means all liabilities, indebtedness and obligations
            of the Sellers in relation to the UK Business and the UK Assets
            whether arising before, on or after the Closing Date, including
            without limitation all obligations and liabilities under or in
            respect of the UK Contracts, and/or relating to or which constitute
            overdrafts, (except to the extent that any such liabilities or
            obligations relate to taxation payable by the UK Business before the
            Closing Date and/or to the extent that they constitute the
            intercompany accounts or loans described in Section 5.9 of the
            Master Agreement);

            "UK SITE" means the properties known as Units 1, 6 and 8 Airfield
            Way all in Christchurch, Dorset, England, UK.

            "VAT" means value added tax pursuant to the VAT Act;

<Page>

            "VAT ACT" means Value Added Tax 1994 (as amended or re-enacted from
            time to time) and includes all orders and subordinate legislation
            made thereunder;

            "WORKING HOURS" means 9:30 a.m. to 5:30 p.m. on a business day.

     1.2    In this Agreement, unless otherwise specified:

            1.2.1   references to clauses, paragraphs and schedules are to
                    clauses, paragraphs and schedules to this Agreement;

            1.2.2   reference to any statute or statutory provision in this
                    Agreement shall be construed as a reference to the same as
                    it may have been, or may from time to time be, amended,
                    modified or re-enacted, except to the extent that any
                    amendment or modification made after the Closing Date would
                    increase or alter the liability of the Sellers or the
                    Purchaser or alter or adversely affect the rights and
                    benefits afforded to the Sellers or the Purchaser under this
                    Agreement;

            1.2.3   references to "INDEMNIFY" and "INDEMNIFYING" any person
                    against or in respect of any circumstance shall include
                    indemnifying and keeping him harmless from all actions,
                    claims, demands and proceedings from time to time made
                    against that person and all loss or damage and all payments,
                    costs or expenses (including professional fees and
                    disbursements) made or incurred by that person as a
                    consequence of or which would not have arisen but for that
                    circumstance;

            1.2.4   general words shall not be given a restrictive meaning by
                    reason of the fact that they are followed by particular
                    examples intended to be embraced by the general words; and

            1.2.5   references to the business carried on by P&G plc or the
                    practice of P&G plc in relation to the UK Business or any
                    matter in relation to it shall include the business carried
                    on by P&G Aerospace UK under the Agency Agreement.

2.   SALE AND PURCHASE

     2.1    In consideration of the amount payable by the Purchaser pursuant to
            the Master Agreement, the mutual covenants hereinafter set forth,
            and for other good and valuable consideration, the receipt and
            adequacy of which are hereby acknowledged P&G plc hereby sells, and
            the Purchaser hereby purchases, the UK Business as a going concern
            and all of P&G plc's and the Seller's right to the title and
            interest in and to the UK Assets listed below as at the Closing Date
            insofar as they relate to the UK Business, and subject to clauses
            19.1, 19.2 and 19.3, free and clear of all Liens, other than
            Permitted Liens:

<Page>

            2.1.1   the UK Business Goodwill;

            2.1.2   the UK Business Plant and Machinery;

            2.1.3   the UK Debts;

            2.1.4   the UK Business Stocks;

            2.1.5   the benefit subject to the burden of the UK Contracts;

            2.1.6   the UK Business Intellectual Property;

            2.1.7   the UK Business Records;

            2.1.8   the UK Claims;

            2.1.9   any cash in hand and/or at the bank belonging to the UK
                    Business to the extent to which it is included as an asset
                    in the Closing Balance Sheet; and

            2.1.10  any other asset owned by P&G plc which is used primarily in
                    the UK Business (which term "primarily" shall mean material
                    for the operation of the UK Business as it is currently
                    carried on),

            but excluding the Excluded Assets, which term shall include,:

            2.1.11  cash in hand and/or at the bank used in the UK Business on
                    the Closing Date, other than for any cash in hand and/or at
                    the bank belonging to the UK Business to the extent to which
                    it is included as an asset in the Closing Balance Sheet;

            2.1.12  all right, title and interest in the name "BOWTHORPE" and/or
                    "SPIRENT" and all and any logos, trademarks, names and other
                    Intellectual Property relating thereto or belonging to the
                    Sellers or any of them subject to the licence granted to the
                    Purchaser in the Master Agreement to continue to use any
                    thereof after the Closing Date;

            2.1.13  amounts recoverable in respect of taxation relating to the
                    UK Business attributable to periods ended on or before, or
                    to transactions occurring on or before, the Closing Date;

            2.1.14  any assets, businesses, plant, equipment, machinery,
                    computer and communication equipment, loose tools, fittings,
                    furniture, partitioning, books, stationery, vehicles, spares
                    and other goods of the Companies and/or the Flight Data
                    Company Limited including (but without limitation) any of
                    the assets or the business of P&G Controls UK at the UK
                    Site;

            2.1.15  any shares or stock of Sellers including (but without
                    limitation) the P&G UK Shares; and/or

<Page>

            2.1.16  any other right, asset or interest of the Sellers which does
                    not relate primarily to the UK Business (which term
                    "primarily" shall mean material for the operation of the UK
                    Business as it is currently carried on).

     2.2    In addition to any other consideration payable, in consideration for
            the sale to the Purchaser of the UK Business and the UK Assets, the
            Purchaser shall assume and discharge all of the UK Liabilities.

     2.3    For the avoidance of doubt, part 1 of Law of Property (Miscellaneous
            Provisions) Act 1994 (A LAW OF ENGLAND) shall not apply for the
            purpose of this Agreement.

3.   CLOSING

     3.1    The sale and purchase of the UK Business and the UK Assets shall
            take place and be completed on the Closing Date in accordance with
            and subject to the satisfaction of the conditions set forth in the
            Master Agreement.

     3.2    In addition to satisfying the requirements of Section 1.2 of the
            Master Agreement, at Closing P&G plc shall:

            3.2.1   deliver to the Purchaser (or, if so requested by the
                    Purchaser, make available to the Purchaser at the relevant
                    UK Sites):

                    (i)       such of the UK Assets as are capable of being
                              transferred by delivery;

                    (ii)      originals (to the extent available) of the UK
                              Contracts;

                    (iii)     the UK Business Records; and

                    (iv)      all records of national insurance and PAYE
                              relating to all the UK Business Employees on the
                              Closing Date and all records kept under the
                              Working Time Regulations 1998;

            3.2.2   deliver to the Purchaser copy of the board minutes of a
                    meeting of the directors of P&G plc authorising the
                    execution of this agreement and of any other document that
                    may be necessary to give effect to it and appointing the
                    relevant signatories to sign such documents on its behalf;

            3.2.3   deliver to the Purchaser a certified copy of any power of
                    attorney or other instrument under which this Agreement or
                    any related document is executed on behalf of P&G plc;

<Page>

4.   TAX PROVISIONS

     4.1    UK VAT

            4.1.1   The consideration for all supplies for VAT purposes made or
                    deemed to be made under or in connection with the sale of
                    the UK Assets under this agreement shall be deemed to be
                    exclusive of VAT. The party receiving the supply in question
                    shall pay to the party making that supply (in addition to
                    the consideration) all VAT which the party making the supply
                    is required to account for to HM Customs & Excise
                    ("Customs") in relation to that supply.

            4.1.2   For the purposes of this Section: "TOGC" means the transfer
                    of a business or part of a business as a going concern for
                    the purposes of section 49 of the Value Added Tax Act 1994
                    and article 5 of the Value Added Tax (Special Provisions)
                    Order 1995.

            4.1.3   P&G plc and the Purchaser believe that the sale of the UK
                    Assets will be treated as a TOGC and accordingly that the
                    sale will be neither a supply of goods nor a supply of
                    services for the purposes of the VAT Act with the
                    consequence that VAT will not be charged on the sale of the
                    UK Assets at Closing.

            4.1.4   P&G plc warrants to the Purchaser that it is registered for
                    VAT purposes under the VAT Act.

            4.1.5   The Purchaser warrants to P&G plc that: (i) it is registered
                    for VAT purposes under the VAT Act or immediately as a
                    result of this transaction will be a taxable person within
                    the meaning of section 3 of the VAT Act; (ii) it intends to
                    use the UK Assets for the same business as that previously
                    carried on by P&G plc in relation to those UK Assets; and
                    (iii) it is not purchasing the UK Assets as a nominee for
                    any other person.

            4.1.6   All VAT records relating to the UK Assets in respect of
                    periods prior to completion and which are required to be
                    preserved for any period after completion under the VAT Act
                    shall be transferred to the Purchaser.

            4.1.7   The party retaining the VAT records referred to above shall
                    procure that the same shall be preserved for such periods as
                    may be required by law and during such periods shall permit
                    the other party or its agents at all reasonable times and
                    subject to reasonable written notice to inspect and take
                    copies of such records at the cost of the party requesting
                    such inspection and/or copies.

            4.1.8   If it is determined that the sale of the UK Assets under
                    this Appendix A-2 does not constitute a TOGC, then the VAT

<Page>

                    chargeable by P&G plc to the Purchaser shall be paid upon
                    the later of within 5 business day of demand by P&G plc and
                    the day which falls 2 business days before the date upon
                    which such VAT becomes payable to HM Customs and Excise, and
                    any VAT records provided by P&G plc to the Purchaser shall
                    be returned to P&G plc.

     4.2    The consideration attributable to each of the UK Assets shall be
            determined and allocated in accordance with Section 5.2F of the
            Master Agreement.

5.   LIABILITIES UNDER CONTRACTS

     5.1    The Purchaser undertakes that following Closing it will perform P&G
            plc's obligations and liabilities created by or arising under the UK
            Contracts before at or after Closing. The Purchaser will perform its
            obligations under the UK Contracts. in accordance with their terms
            and shall indemnify P&G plc and each Seller against all losses,
            liabilities and costs incurred by P&G plc and/or any such Seller in
            respect of the UK Contracts (including without limitation as a
            result of a breach of any of the UK Contracts or to the extent they
            are incurred by reason of or in connection with the non-performance,
            variation, termination (or the consequences of any such variation or
            termination) or the negligent or defective performance of the
            Contracts by the Purchaser).

6.   THIRD PARTY CONSENTS UNDER CONTRACTS

     6.1    To the extent that the benefit of any of the UK Contracts can be
            assigned by P&G plc to the Purchaser without any Third Party
            Consents, or relevant Third Party Consents have been obtained prior
            to Closing, this Agreement shall constitute an assignment of the
            relevant UK Contracts with effect from the Closing Date.

     6.2    If any Third Party Consent has not been obtained at or before
            Closing, the sale of the relevant UK Contract shall, notwithstanding
            Closing, be conditional on the relevant Third Party Consent.

     6.3    Where a Third Party Consent is required for the assignment of the
            benefit of, or novation, of, a UK Contract:

            6.3.1   this Agreement shall not constitute an assignment or
                    attempted assignment of the relevant UK Contract if the
                    assignment or attempted assignment would constitute a breach
                    of the UK Contract, and

            6.3.2   the Purchaser shall be responsible (at the expense of the
                    Purchaser) for obtaining, and shall use all reasonable
                    endeavours with the co-operation of P&G plc to obtain, any
                    Third Party Consent to assignment or novation of all
                    relevant UK Contracts after the Closing.

<Page>

     6.4    After Closing, in the event any UK Contract is not effectively
            assigned or is not permitted to be assigned to the Purchaser except
            with a Third Party Consent, until the relevant Third Party Consent
            is obtained:

            6.4.1   P&G plc shall be deemed to hold the benefit of that UK
                    Contract in trust for the Purchaser, and the Purchaser shall
                    (if sub-contracting or agency is permissible under the
                    relevant UK Contract) as P&G plc's sub-contractor or agent
                    perform on behalf of P&G plc (but at the Purchaser's
                    expense) all the obligations of P&G plc under such UK
                    Contract and indemnify P&G plc in accordance with clause
                    6.4.2; and

            6.4.2   the Purchaser shall indemnify P&G plc against all losses,
                    liabilities and costs incurred by P&G plc as a result of any
                    act, neglect, default or omission on the part of the
                    Purchaser to perform or comply with any such obligation of
                    P&G plc which falls to be performed before on or after the
                    Closing Date, as referred to in Clause 6.4.1.

            6.4.3   P&G plc shall account to the Purchaser for all monies, goods
                    or other benefits received by P&G plc under the relevant UK
                    Contract in respect of the period after the Closing Date as
                    soon as reasonably practicable and in any event within 21
                    Business Days of receipt; and

            6.4.4   P&G plc shall not agree to any amendment or termination of
                    the relevant UK Contract or any waiver by P&G plc of its
                    rights under the relevant UK Contract without the
                    Purchaser's prior written consent.

     6.5    If in the circumstances described in clause 6.4.1, any UK Contract
            does not permit sub-contracting or agency, the parties will make
            such other arrangements between themselves as may be permissible to
            implement as far as possible the effective transfer of the benefit
            and burden of such UK Contract to the Purchaser.

     6.6    The Purchaser shall indemnify each Seller against all liabilities
            and costs incurred by such Seller in respect of any UK Contract or
            as a result of any act, neglect, default or omission on the part of
            the Purchaser to perform or comply with its obligations under clause
            6.1 to 6.5 (inclusive).

7.   UK LIABILITIES

     7.1    Without prejudice to and in addition to section 5.4 of the Master
            Agreement, the Purchaser shall assume responsibility for, and
            indemnify each Seller against, the payment or performance of the UK
            Liabilities and shall pay or perform the UK Liabilities.

<Page>

     7.2    Without limiting the generality of the provisions of clause 7.1, and
            without prejudice to and in addition to Section 5.4 of the Master
            Agreement, the Purchaser shall be responsible for, and shall
            accordingly indemnify P&G plc and each of the Sellers from and
            against, all liabilities, actual or contingent, outstanding or
            prospectively outstanding, whether before on or after the Closing
            Date in relation to the UK Business including, without limitation:

            7.2.1   accepting responsibility for the performance of the Seller's
                    obligations in respect of all loans, guarantees and
                    indebtedness including, without limitation, hire purchase,
                    conditional sale, lease purchase, finance lease, operating
                    lease and all and any analogous instruments to third parties
                    engaged in connection with the UK Business;

            7.2.2   assuming responsibility for and indemnifying the Sellers
                    against all liability of the UK Business to employees,
                    former employees, customers, suppliers and any other third
                    party of the UK Business in issue or pending or threatened;
                    and

            7.2.3   assuming responsibility for and indemnifying the Sellers
                    against all liability in respect of use, occupation,
                    ownership or possession of any of the UK site heretofore or
                    hereafter used in connection with the carrying on of the UK
                    Business.

8.   LIABILITY UNDER THE AGENCY AGREEMENT

     8.1    The Agency Agreement shall be terminated by P&G plc and P&G
            Aerospace UK, and the parties shall deliver a signed deed of
            termination on the Closing Date.

     8.2    The Purchaser shall indemnify each Seller against all losses,
            liabilities and costs incurred by any such Seller in respect of:

            8.2.1   a claim by or on behalf of P&G Aerospace UK under the Agency
                    Agreement;

            8.2.2   termination of the Agency Agreement; and

            8.2.3   performance or fulfillment or non-performance or
                    non-fulfillment by P&G Aerospace UK or any of the
                    Purchaser's Affiliates, of any contracts or arrangements
                    entered into by P&G Aerospace UK and/or P&G plc pursuant to
                    or under the Agency Agreement before the Closing.

9.   BUSINESS RECORDS

     9.1    Subject to any delivery provisions in clause 4.1.6 above, P&G plc
            shall deliver to the Purchaser all the UK Business Records in
            relation to the UK Business at the Closing, and title in such UK
            Business Records shall vest in the Purchaser on delivery.

<Page>

     9.2    The Purchaser shall make the UK Business Records delivered to it
            hereunder available for inspection during Working Hours by
            representatives of P&G plc for a period of two years after the
            Closing Date or such longer period as may be prescribed by law on
            reasonable advance written notice being given, subject to
            satisfactory confidentiality undertakings, from P&G plc.

10.  EMPLOYEES

     10.1   The Purchaser acknowledges that, pursuant to the Transfer
            Regulations, at the Closing it will become the employer of the UK
            Business Employees;

     10.2   The Purchaser shall indemnify the Sellers in full for and against
            all Liabilities whatsoever and howsoever arising incurred or
            suffered by any of the Sellers in relation to:

            (a)     the employment and/or termination of employment of the UK
                    Business Employees and/or any other event or occurrence in
                    respect of the UK Business Employees at any time before, on
                    or after the Closing;

            (b)     any claim by or on behalf of any of the UK Business
                    Employees arising out of any failure by the Purchaser to
                    comply with Regulation 10 of the Transfer Regulations; and

            (c)     any claim by or on behalf of any UK Business Employee who
                    resigns his employment and/or makes an objection under
                    Regulation 5(4)(A) of the Transfer Regulations at any time
                    before, on or after the Closing by reason of any actual or
                    anticipatory act or omission by the Purchaser to such UK
                    Business Employee's detriment.

11.  EFFECT OF CLOSING

     Any provision of this Agreement, and of any other documents referred to in
     it, which is capable of being performed after, but which has not been
     performed at or before, the Closing shall remain in full force and effect
     notwithstanding the Closing.

12.  TRUST

     P&G plc shall hold the benefit of the terms of this Agreement for
     themselves and upon trust for each of the Sellers.

13.  REMEDIES AND WAIVERS

     13.1   No delay or omission on the part of any party to this Agreement in
            exercising any right, power or remedy provided by law or under this
            Agreement or any other documents referred to in it shall impair such
            right, power or remedy or operate as a waiver thereof.

<Page>

     13.2   The single or partial exercise of any right, power or remedy
            provided by law or under this Agreement shall not preclude any other
            or further exercise thereof or the exercise of any other right,
            power or remedy.

     13.3   The rights, powers and remedies provided in this Agreement are
            cumulative and not exclusive of any rights, powers and remedies
            provided by law.

14.  ASSIGNMENT

     This Agreement shall be blinding upon and enure to the benefit of P&G plc
     and the Purchaser and their respective administrators, successors and
     assigns provided that any assignment and the benefits and obligations under
     it and any part of it by any of the parties to this Agreement, shall not be
     assignable without the prior written consent of the other party to this
     Agreement (except as may be permitted by Section 9.3 of the Master
     Agreement) and any purported assignment or other transfer without such
     consent shall be void and unenforceable.

15.  FURTHER ASSURANCE

     Each of P&G plc and the Purchaser shall at their own cost, from time to
     time, on being required to do so by the other party now or at any time in
     the future do or procure the carrying out of all such acts and/or execute
     or procure the execution of all such documents, in a form satisfactory to
     the requiring party, as the requiring party may reasonably consider
     necessary for vesting the UK Business and the UK Assets in the name of the
     Purchaser and otherwise for giving full effect to this Agreement and
     securing to the requiring party the full benefit of the rights, powers and
     remedies conferred upon the requiring party in this Agreement.

16.  ENTIRE AGREEMENT

     16.1   For the purposes of this clause, "REPRESENTATION" means a draft,
            agreement, undertaking, representation, warranty, promise, assurance
            or arrangement of any nature whatsoever, whether or not in writing,
            made or given by any Seller or any other person on behalf of the
            Sellers in connection with this Agreement.

     16.2   Each party acknowledges that in entering into this Agreement it is
            not relying on any Representation other than as set out in the
            Master Agreement and then only in accordance with the terms
            contained therein.

     16.3   The Purchaser shall have no right of action against any Seller
            arising out of or in connection with any Representation other than
            in accordance with and pursuant to the terms of the Master
            Agreement.

17.  NOTICES

     Any notice or other communication given or made under or in connection with
     the matters contemplated by this Agreement shall be in writing and shall be

<Page>

     made in accordance with the terms as to notices set out in the Master
     Agreement.

18.  COUNTERPARTS

     18.1   This Agreement may be executed in any number of counterparts, and by
            the parties on separate counterparts, but shall not be effective
            until each party has executed at least one counterpart.

     18.2   Each counterpart shall constitute an original of this Agreement, but
            the counterparts shall together constitute one and the same
            instrument.

19.  THE MASTER AGREEMENT

     19.1   Nothing in this Agreement shall be nor shall it be deemed to be a
            condition, warranty, representation, covenant, undertaking and/or
            indemnity given by any of the Sellers and P&G plc either in relation
            to any of the Sellers' and P&G plc's title to the UK Assets and the
            UK Assets and/or the UK Business or of whatever nature or howsoever
            arising whether implied or expressly given whether arising by
            operation of law or otherwise and accordingly, except as
            specifically set out in section 3.1 of the Master Agreement, all
            conditions and warranties implied by law in relation to any of the
            UK Assets and the UK Business are excluded under this Agreement.

     19.2   Nothing in this Agreement shall be deemed to be an extension or
            variation of any of the warranties, representations, covenants,
            undertakings and/or indemnities given by any of the Sellers and P&G
            plc as set out in the Master Agreement.

     19.3   Notwithstanding anything herein to the contrary, each party's sole
            and exclusive remedy against any other party for any breach of a
            representation, warranty, covenant or other obligation made in or
            imposed by this Agreement, or otherwise in connection with the
            transfer of the UK Business or the other transactions contemplated
            hereunder, shall be a claim for indemnification under Section 9.14
            of the Master Agreement, subject to all of the limitations of
            Section 9.14 of the Master Agreement, including under Section
            9.14(C) of the Master Agreement.

20.  INVALIDITY

     If at any time any provision of this Agreement is or becomes illegal,
     invalid or unenforceable in any respect under the law of any jurisdiction,
     that shall not affect or impair:

     20.1   the legality, validity or enforceability in that jurisdiction of any
            other provision of this Agreement; or

     20.2   the legality, validity or enforceability under the law of any other
            jurisdiction of that or any other provision of this Agreement.

<Page>

21.  CONTRACTS (RIGHTS OF THIRD PARTIES) ACT 1999

     A person (other than the Sellers) who is not a party to this Agreement
     shall have no right to enforce this Agreement or any agreement or document
     entered into pursuant to this Agreement under the Contracts (Rights of
     Third Parties) Act 1999.

22.  CHOICE OF GOVERNING LAW

     This Agreement shall be governed by and constructed in all respects in
     accordance with English law; PROVIDED, HOWEVER, that any claim hereunder
     shall be brought in the courts of the Southern District of the State of New
     York in the United States of America pursuant to the provisions of Section
     9.13 of the Master Agreement.

IN WITNESS OF WHICH THE PARTIES OR THEIR DULY AUTHORISED REPRESENTATIVES HAVE
EXECUTED THIS AGREEMENT AS A DEED.

<Page>

                                   SCHEDULE I

                          LIST OF UK BUSINESS EMPLOYEES

<Page>

EXECUTED as a deed by                 )
PENNY & GILES                         )
INTERNATIONAL PLC by                  )
     , its duly authorised            )
attorney                              )

EXECUTED as a deed by                 )
CURTISS-WRIGHT FLIGHT                 )
SYSTEMS, INC, acting by two           )
directors or one director and the     )
secretary

        Director

        Director/Secretary

<Page>

                                  APPENDIX A-3

                         GERMAN ASSET TRANSFER AGREEMENT

THIS GERMAN ASSET TRANSFER AGREEMENT (the "AGREEMENT") is made as of [DATE OF
CLOSING], 2002 by Spirent GmbH and [GERMAN CURTISS-WRIGHT SUBSIDIARY] (the
"GERMAN PURCHASER"), pursuant to the Stock and Asset Purchase Agreement dated as
of 19 February 2002 (together with the Schedules and Appendices thereto, the
"MASTER AGREEMENT"), by and among Curtiss-Wright Flight Systems, Inc., a
Delaware corporation (the "PURCHASER"); and Spirent International Incorporated,
a Delaware corporation; Autronics Corporation, a Delaware corporation; Spirent
plc, a company formed under the laws of England and Wales; Penny & Giles
International plc, a company formed under the laws of England and Wales; and
Spirent GmbH. Unless otherwise defined herein, capitalized terms used herein
shall have the meanings ascribed to them in the Master Agreement, and in the
event of any conflict between the provisions of this Agreement and the
provisions of the Master Agreement, the provisions of the Master Agreement shall
control unless otherwise expressly provided therein;

In consideration of the payment by the German Purchaser to Spirent GmbH of the
amount payable by Purchase pursuant to Section 5.2(F) of the Master Agreement,
the mutual covenants hereinafter set forth, and for other valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, and
subject to the terms and conditions set forth in this Agreement and the Master
Agreement.

(a)  In this Agreement and the Exhibits to it;

     "CLOSING" shall have the meaning set out in section 2.1 of the Master
     Agreement;

     "EXCLUDED ASSETS" means those assets that have been sold and transferred to
     a third party in the ordinary course of business of the German Business or
     that have perished prior to the Closing;

     "GERMAN ASSETS" means all of Spirent GmbH's right, title and interest in
     and to all assets, real, personal or mixed, tangible and intangible, of
     every kind and description, wherever located, and including goodwill, used
     in or related to the German Business, including, without limitation, all
     the assets of the German Business listed in the clauses to Section (b) of
     this Agreement, including those assets that replace or supplement in the
     ordinary course of business of the German Business all those assets that
     are listed in the clauses to Section (b) of this Agreement but excluding in
     any event the Excluded Assets;

     "GERMAN BUSINESS" means the sale of joysticks, position sensors, and other
     precision devices for industrial application, each as conducted as of the
     date hereof by Spirent GmbH through its Penny & Giles branch;

<Page>

     "GERMAN BUSINESS EMPLOYEES" means those persons employed by Spirent GmbH
     who are wholly or mainly engaged in connection with the German Business and
     whose names are listed in EXHIBIT 1 to this Agreement;

     "GERMAN BUSINESS GOODWILL" means all the goodwill of Spirent GmbH in
     relation to the German Business, together with the right of the German
     Purchaser to represent itself as carrying on the German Business in
     succession to Spirent GmbH;

     "GERMAN BUSINESS PLANT AND MACHINERY" means all machinery, equipment,
     tools, leasehold improvements, business machines, computer and
     communications hardware, vehicles, parts, supplies, loose tools, fittings,
     books, stationary, spares, materials, furniture, furnishings, plant and
     office equipment and other fixed assets or tangible personal property
     (other than German Business Stocks) belonging or related to the German
     Business listed without limitation on EXHIBIT 2 hereto, of every kind owned
     or leased by Spirent GmbH (wherever located and whether or not carried on
     Spirent GmbH's books (used in the German Business), together with any
     express or implied warranty by the manufacturers or sellers or lessors of
     any item or component part thereof and all maintenance records and other
     documents related thereto;

     "GERMAN BUSINESS PRODUCTS" means all products serviced and sold in the
     German Business.

     "GERMAN BUSINESS RECORDS" means all books, records, data and other
     information that is inscribed on a tangible medium or that is stored in an
     electronic or other medium and is retrievable in perceivable form,
     including computer or machine-readable material of Spirent GmbH belonging
     or related to the German Business, including without limitation, client and
     customer lists and records, referral sources, research and development
     reports and records, production reports and records, service and warranty
     records, equipment logs, operating guides and manuals, financial and
     accounting records, creative materials, advertising materials, promotional
     materials, studies, reports, correspondence and all information and
     know-how (whether or not confidential and in whatever form held), data,
     technical knowledge, methodology and financial, commercial, trade and
     business secrets relating to the German Business and other similar
     documents and records and, subject to Laws, copies of all personnel records
     and other records relating to employees and employee benefit plans;

     "GERMAN BUSINESS STOCKS" means all inventories, wherever located, including
     raw materials, parts, engineering stores, work in process, packaging and
     promotional material, goods held for sale, returns, repairs, finished goods
     or completed services and manufacturing, administrative and other supplies
     or stock-in-trade held by the Spirent GmbH for resale as or within German
     Business Products or for use or consumption in the production or sale of
     the German Business Products listed on EXHIBIT 3 hereto;

                                       -2-
<Page>

     "GERMAN CLAIMS" means all rights and claims of Spirent GmbH against third
     parties relating to the German Assets or the German Business, whether
     choate or inchoate, known or unknown, contingent or uncontingent, including
     (without limitation) all manufacturers' and suppliers' warranties and
     representations.

     "GERMAN CONTRACTS" means all the Commitments to which Spirent GmbH is a
     party, or under which Spirent GmbH has any outstanding right, liability or
     obligation, in each case relating to the German Business, including,
     without limitation, the Commitments set forth on EXHIBIT 4 hereto;

     "GERMAN DEBTS" means all payments due to Spirent GmbH for goods or services
     supplied by or on behalf of Spirent GmbH prior to the Closing Date in
     carrying on the German Business in the ordinary course of business;

     "GERMAN DEPOSITS" means all rights of Spirent GmbH relating to deposits and
     prepaid expenses, claims for refunds and rights to offset in respect
     thereof relating to the German Business or the German Assets.

     "GERMAN INSURANCE" means all insurance benefits, including rights and
     proceeds, arising from or relating to the German Business prior to the
     Closing Date, unless expended in accordance with the Master Agreement.

     "GERMAN INTELLECTUAL PROPERTY" means all of the intangible rights and
     property of Spirent GmbH, including, without limitation, intellectual
     property owned or licensed (as licensor or licensee) by Spirent GmbH in
     which Spirent GmbH has a proprietary interest, including, without
     limitation, licenses, patents, registered and unregistered copyrights,
     rights in computer software, designs and drawings, topography rights,
     engineering and manufacturing documents, technical manuals, database
     rights, patterns, processes, formulae, data, signs, know-how, trade
     secrets, registered and unregistered trademarks, service marks and trade
     names, business names, inventions and discoveries (whether patentable or
     not), computer software, telephone, telecopy and e-mail addresses and
     listings, all rights in internet web sites and internet domain names
     presently used by Spirent GmbH, all rights in mask works, and other similar
     rights held or used by the Spirent GmbH, and all applications therefor and
     registrations thereof, and all rights or forms of protection of a similar
     or corresponding nature in any part of the world or having equivalent or
     similar effect to any of these which may subsist whether registered or not
     or capable of registration or not, including without limitation all
     proprietary information of the Spirent GmbH, related to or used in the
     German Business and all rights to sue for past, present and future
     infringement or other violations of the German Intellectual Property, and
     all going concern value and goodwill of Spirent GmbH associated with any of
     the foregoing or in relation to the German Business, including, without
     limitation, the intangible rights and property listed on EXHIBIT 5 hereto;

                                       -3-
<Page>

     "GERMAN LEASED ASSETS" those assets of the German Business the subject of
     the German Leasing Agreements;

     "GERMAN LEASING AGREEMENTS" means the leasing, lease purchase, hire,
     rental, hire purchase or similar agreements entered into by Spirent GmbH
     for the purpose of the German Business, including, without limitation, the
     agreements set forth on EXHIBIT 6 hereto;

     "GERMAN PERMITS" means all permits, licenses, registrations, approvals,
     consents and authorizations issued, granted, given or otherwise made
     available by or under the authority of any Governmental Entity or other
     Person or pursuant to any Law and held or used by Spirent GmbH in
     connection with the German Business and all pending applications therefor
     or renewals;

     "GERMAN RECEIVABLES" means (a) all trade accounts receivable and other
     rights to payment and the full benefit of all security for such accounts or
     rights to payment, including all trade accounts receivable representing
     amounts receivable in respect of goods shipped or arising out of the sale
     or lease of the German Business Products or the rendering of services in
     the German Business by the Spirent GmbH and (b) any claim, remedy or other
     right related to any of the foregoing set forth;

(b)  Spirent GmbH hereby sells, conveys, transfers, assigns and delivers to the
     German Purchaser all of Spirent GmbH's right, title and interest in and to
     the German Business as a going concern and all of Spirent GmbH's right,
     title and interest in and to the German Assets, including the German Assets
     listed below, as at the Closing Date free and clear of all Liens, other
     than Permitted Liens: (i) the German Leasing Agreements and the German
     Leased Assets; (ii) the German Intellectual Property; (iii) the German
     Business Plant and Machinery; (iv) the German Business Records; (v) the
     German Business Stocks; (vi) the German Claims; (vii) the German Contracts;
     (viii) the German Debts; (ix) the German Deposits; (x) the German
     Insurance; (xi) the German Permits; (xii) the German Receivables; and
     (xiii) the German Business Goodwill; and Spirent GmbH hereby transfers
     possession of the German Assets to the German Purchaser by physically
     handing over, or permitting the German Purchaser to take, such possession
     and, in respect of German Assets in the possession of third parties, by
     assigning to the German Purchaser all of Spirent GmbH's claims against such
     third parties for the surrender or return of the said German Assets. The
     German Purchaser purchases and accepts such transfer, assignment and
     delivery from Spirent GmbH.

(c)  Those assets, agreements, claims and rights that are not listed herein
     shall remain with Spirent GmbH unless they are unequivocally attributable
     to the German Assets.

(d)  In case there are any doubts arising as to the attribution of assets,
     agreements, claims and rights to the German Assets, Spirent GmbH and the
     German Purchaser shall endeavor to

                                       -4-
<Page>

     find a solution that is based on mutuality and Spirent GmbH shall respect
     the interests and needs of the German Purchaser in a favorable way.

(e)  To the extent provided in the Master Agreement, the German Purchaser hereby
     assumes and agrees to pay, honor and discharge all liabilities, obligations
     and commitments of Spirent GmbH of any nature, whether known or unknown,
     absolute, accrued, contingent or otherwise and whether due or to become
     due, arising out of the operations of the German Business on or before the
     Closing Date, including, but not limited to, (i) all liabilities and
     obligations under the German Leasing Agreements, or under other leases or
     contracts which the German Purchaser elects to accept and assume; (ii) all
     of Spirent GmbH's liabilities, obligations and commitments primarily
     related to or arising in connection with the German Business, and (iii) all
     liabilities and obligations relating to the German Business Employees
     (collectively the "GERMAN LIABILITIES").

(f)  Spirent GmbH and the German Purchaser agree that the employment agreements
     between Spirent GmbH and the German Business Employees are transferred to
     the German Purchaser either according to Section 613 a of the German Civil
     Code or pursuant to this Agreement; the German Purchaser hereby assumes all
     liabilities with respect to these German Business Employees. In case one
     or more of these German Business Employees object to such transfer and
     Spirent GmbH decides to terminate the employment with such objecting German
     Business Employees, the cost of such termination shall be borne by Spirent
     GmbH, including all severance payments, if any. Spirent GmbH and the German
     Purchaser shall coordinate their measures to inform the German Business
     Employees about this Agreement.

(g)  Nothing contained herein is intended to, nor shall it be construed to,
     alter or vary the terms and conditions set forth in the Master Agreement,
     which terms and conditions shall survive the execution and delivery of this
     Agreement. In the event of any inconsistency between the provisions of this
     Agreement and the Master Agreement, the provisions of the Master Agreement
     shall govern. For the avoidance of doubt, all provisions of the Master
     Agreement (including without limitation the representations, warranties,
     covenants and indemnification provisions of the Master Agreements) shall
     apply to the transfer of the German Business in the absence of any express
     provision to the contrary in this Agreement.

(h)  Notwithstanding anything to the contrary in this Agreement, this Agreement
     shall not constitute an agreement to assign or transfer any instrument,
     contract, lease, permit or other agreement or arrangement or any claim,
     right or benefit arising thereunder or resulting therefrom if an assignment
     or transfer or an attempt to make such an assignment or transfer without
     the consent of a third party would constitute a breach or violation thereof
     or affect adversely the rights of the German Purchaser or Spirent GmbH
     thereunder; and any transfer or assignment to the German Purchaser by
     Spirent GmbH of

                                       -5-
<Page>

     any interest under any such instrument, contract, lease, permit or other
     agreement or arrangement that requires the consent of a third party shall
     be made subject to such consent or approval being obtained. In the event
     any such consent or approval is not obtained on or prior to the Closing
     Date, each of Spirent GmbH and the German Purchaser shall continue to use
     all reasonable efforts to obtain any such approval or consent after the
     Closing Date until the later of such time as such consent or approval has
     been obtained and the first anniversary of the date hereof, and Spirent
     GmbH will co-operate with the German Purchaser in any lawful and
     economically feasible arrangement to provide that the German Purchaser
     shall receive the interest of Spirent GmbH, as the case may be, in the
     benefits under any such instrument, contract, lease or permit or other
     agreement or arrangement, including performance by Spirent GmbH, as the
     case may be, as agent, if economically feasible, PROVIDED that the German
     Purchaser shall undertake to pay or satisfy the corresponding liabilities
     for the enjoyment of such benefit to the extent the German Purchaser would
     have been responsible therefor hereunder if such consent or approval had
     been obtained. Nothing in the preceding sentence shall be construed to
     require any party or its Affiliates to pay, or commit to pay, any amount to
     (or incur any obligations in favor of) any Person from whom any such
     consent or approval may be required (other than nominal governmental filing
     fees). Nothing in this Section (g) shall be deemed a waiver by the German
     Purchaser of its right to have received on or before the Closing Date an
     effective assignment of all of the German Assets nor shall this Section (g)
     be deemed to constitute an agreement to exclude from the German Assets any
     assets described under Section (b).

(i)  This Agreement shall be binding upon and inure to the benefit of Spirent
     GmbH and the German Purchaser and their respective administrators,
     successors and assigns, PROVIDED that any assignment, by operation of law
     or otherwise, by any party (except as may be permitted by Section 9.3 of
     the Master Agreement) hereto shall require the prior written consent of the
     other party, and any purported assignment or other transfer without such
     consent shall be void and unenforceable.

(j)  The German Purchaser is liable for all transfer taxes in connection with
     the execution of this Agreement.

(k)  It is understood between the German Purchaser and Spirent GmbH that the
     sale of the German Business is, as a sale of business pursuant to Section 1
     section 1a Umsatzsteuergesetz, not subject to VAT (Umsatzsteuer). If the
     sale of the German Business turns out to be partly or in total subject to
     VAT (Umsatzsteuer) then the purchase price according to Section 5.2(F) of
     the Stock and Asset Purchase Agreement is deemed to be the net purchase
     price. In this case Spirent GmbH shall issue an invoice to the German
     Purchaser in accordance with Section 14 section 1 Umsatzsteuergesetz. The
     German Purchaser shall, assisted by Spirent GmbH, then assign in lieu of
     performance its claim for a VAT refund

                                       -6-
<Page>

     (Umsatzsteuererstattungsanspruch) against the German Internal Revenue
     Service (Finanzamt) pursuant to Section 46 Abgabenordnung.

(l)  After Closing, Spirent GmbH shall provide transitional services to the
     German Purchaser in accordance with Section 5.20 of the Master Agreement.

(m)  This Agreement may be executed in several counterparts. It shall be
     sufficient for the valid conclusion of this Agreement that each party
     hereto signs the counterpart delivered to the respective other party.

(n)  The Exhibits attached hereto shall constitute part of this Agreement. This
     Agreement shall be governed by and construed in accordance with the
     substantive laws of Germany, without giving effect to the principles of
     conflict of laws thereof.

(o)  The invalidity or enforceability of any provision of this Agreement shall
     not affect the validity or enforceability of any other provision of this
     Agreement, which shall remain in full force and effect. No delay or
     omission on the part of any party to this Agreement in exercising any
     right, power or remedy provided by law or under this Agreement or any other
     documents referred to in it shall impair such right, power or remedy or
     operate as a waiver thereof. The single or partial exercise of any right,
     power or remedy provided by law or under this Agreement shall not preclude
     any other or further exercise thereof or the exercise of any other right,
     power or remedy. The rights, powers and remedies provided in this Agreement
     are cumulative and not exclusive of any rights, powers and remedies
     provided by Law.

(p)  Any notice or other communication given or made under or in connection with
     the matters contemplated by this Agreement shall be in writing and shall be
     made in accordance with the terms as to notices set out in the Master
     Agreement.

(q)  Each of Spirent GmbH and the German Purchaser shall, at their own cost,
     from time to time, on being required to do so by the other party now or at
     any time in the future do or procure the carrying out of all such acts
     and/or execute or procure the execution of all such documents, in a form
     satisfactory to the requiring party, as the requiring party may reasonably
     consider necessary for vesting the German Business and the German Assets in
     the name of the German Purchaser and otherwise for giving full effect to
     this Agreement and securing to the requiring party the full benefit of the
     rights, powers and remedies conferred upon the requiring party in this
     Agreement.

IN WITNESS WHEREOF the parties have caused this Agreement to be executed by
their authorized representatives as of the date first set forth above.

                                       -7-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00039-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00039-of-00352.parquet"}]]