ACCELERATED NETWORKS INC
S-1/A, EX-1.1, 2000-06-01
COMPUTER COMMUNICATIONS EQUIPMENT
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                                                                     EXHIBIT 1.1

                               [NUMBER OF SHARES]

                           ACCELERATED NETWORKS, INC.

                                  COMMON STOCK

                             UNDERWRITING AGREEMENT


                                                                   June __, 2000


CREDIT SUISSE FIRST BOSTON CORPORATION
UBS WARBURG
U.S. BANCORP PIPER JAFFRAY INC.
As Representatives of the Several Underwriters,
   c/o Credit Suisse First Boston Corporation,
       Eleven Madison Avenue,
       New York, NY 10010-3629

Dear Sirs:

         1. Introductory. Accelerated Networks, Inc., a Delaware corporation
("COMPANY"), proposes to issue and sell      shares ("FIRM SECURITIES") of its
common stock par value $0.001 per share ("SECURITIES") and also proposes to
issue and sell to the Underwriters, at the option of the Underwriters, an
aggregate of not more than      additional shares ("OPTIONAL SECURITIES") of its
Securities as set forth below. The Firm Securities and the Optional Securities
are herein collectively called the "OFFERED SECURITIES". As part of the offering
contemplated by this Agreement, CREDIT SUISSE FIRST BOSTON CORPORATION (the
"DESIGNATED UNDERWRITER") has agreed to reserve out of the Firm Securities
purchased by it under this Agreement, up to      shares, for sale to the
Company's directors, officers, employees and other parties associated with the
Company (collectively, "PARTICIPANTS"), as set forth in the Prospectus (as
defined herein) under the heading "Underwriting" (the "DIRECTED SHARE PROGRAM").
The Firm Securities to be sold by the Designated Underwriter pursuant to the
Directed Share Program (the "DIRECTED SHARES") will be sold by the Designated
Underwriter pursuant to this Agreement at the public offering price. Any
Directed Shares not orally confirmed for purchase by a Participant by the end of
the business day on which this Agreement is executed will be offered to the
public by the Underwriters as set forth in the Prospectus. The Company hereby
agrees with the several Underwriters named in Schedule A hereto ("UNDERWRITERS")
as follows:

         2. Representations and Warranties of the Company. The Company
represents and warrants to, and agrees with, the several Underwriters that:

            (a) A registration statement (No. 333-31732) relating to the Offered
         Securities, including a form of prospectus, has been filed with the
         Securities and Exchange




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         Commission ("COMMISSION") and either (i) has been declared effective
         under the Securities Act of 1933, as amended ("ACT"), and is not
         proposed to be amended or (ii) is proposed to be amended by amendment
         or post-effective amendment. If such registration statement ("INITIAL
         REGISTRATION STATEMENT") has been declared effective, either (i) an
         additional registration statement ("ADDITIONAL REGISTRATION STATEMENT")
         relating to the Offered Securities may have been filed with the
         Commission pursuant to Rule 462(b) ("RULE 462(b)") under the Act and,
         if so filed, has become effective upon filing pursuant to such Rule and
         the Offered Securities all have been duly registered under the Act
         pursuant to the initial registration statement and, if applicable, the
         additional registration statement or (ii) such an additional
         registration statement is proposed to be filed with the Commission
         pursuant to Rule 462(b) and will become effective upon filing pursuant
         to such Rule and upon such filing the Offered Securities will all have
         been duly registered under the Act pursuant to the initial registration
         statement and such additional registration statement. If the Company
         does not propose to amend the initial registration statement or if an
         additional registration statement has been filed and the Company does
         not propose to amend it, and if any post-effective amendment to either
         such registration statement has been filed with the Commission prior to
         the execution and delivery of this Agreement, the most recent amendment
         (if any) to each such registration statement has been declared
         effective by the Commission or has become effective upon filing
         pursuant to Rule 462(c) ("RULE 462(c)") under the Act or, in the case
         of the additional registration statement, Rule 462(b). For purposes of
         this Agreement, "EFFECTIVE TIME" with respect to the initial
         registration statement or, if filed prior to the execution and delivery
         of this Agreement, the additional registration statement means (i) if
         the Company has advised the Representatives that it does not propose to
         amend such registration statement, the date and time as of which such
         registration statement, or the most recent post-effective amendment
         thereto (if any) filed prior to the execution and delivery of this
         Agreement, was declared effective by the Commission or has become
         effective upon filing pursuant to Rule 462(c), or (ii) if the Company
         has advised the Representatives that it proposes to file an amendment
         or post-effective amendment to such registration statement, the date
         and time as of which such registration statement, as amended by such
         amendment or post-effective amendment, as the case may be, is declared
         effective by the Commission. If an additional registration statement
         has not been filed prior to the execution and delivery of this
         Agreement but the Company has advised the Representatives that it
         proposes to file one, "EFFECTIVE TIME" with respect to such additional
         registration statement means the date and time as of which such
         registration statement is filed and becomes effective pursuant to Rule
         462(b). "EFFECTIVE DATE" with respect to the initial registration
         statement or the additional registration statement (if any) means the
         date of the Effective Time thereof. The initial registration statement,
         as amended at its Effective Time, including all information contained
         in the additional registration statement (if any) and deemed to be a
         part of the initial registration statement as of the Effective Time of
         the additional registration statement pursuant to the General
         Instructions of the Form on which it is filed and including all
         information (if any) deemed to be a part of the initial registration
         statement as of its Effective Time pursuant to Rule 430A(b) ("RULE
         430A(b)") under the Act, is hereinafter referred to as the "INITIAL
         REGISTRATION STATEMENT". The additional registration statement, as
         amended at its Effective Time, including the contents of the initial
         registration statement incorporated by reference therein and including
         all information (if any) deemed to be a part of the additional
         registration statement as of its Effective Time pursuant to Rule
         430A(b), is hereinafter referred to as the "ADDITIONAL REGISTRATION
         STATEMENT". The Initial Registration Statement and the Additional
         Registration Statement are herein referred to collectively as


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         the "REGISTRATION STATEMENTS" and individually as a "REGISTRATION
         STATEMENT". The form of prospectus relating to the Offered Securities,
         as first filed with the Commission pursuant to and in accordance with
         Rule 424(b) ("RULE 424(b)") under the Act or (if no such filing is
         required) as included in a Registration Statement, is hereinafter
         referred to as the "PROSPECTUS". No document has been or will be
         prepared or distributed in reliance on Rule 434 under the Act.

            (b) If the Effective Time of the Initial Registration Statement is
         prior to the execution and delivery of this Agreement: (i) on the
         Effective Date of the Initial Registration Statement, the Initial
         Registration Statement conformed in all material respects to the
         requirements of the Act and the rules and regulations of the Commission
         ("RULES AND REGULATIONS") and did not include any untrue statement of a
         material fact or omit to state any material fact required to be stated
         therein or necessary to make the statements therein not misleading,
         (ii) on the Effective Date of the Additional Registration Statement (if
         any), each Registration Statement conformed, or will conform, in all
         material respects to the requirements of the Act and the Rules and
         Regulations and did not include, or will not include, any untrue
         statement of a material fact and did not omit, or will not omit, to
         state any material fact required to be stated therein or necessary to
         make the statements therein not misleading and (iii) on the date of
         this Agreement, the Initial Registration Statement and, if the
         Effective Time of the Additional Registration Statement is prior to the
         execution and delivery of this Agreement, the Additional Registration
         Statement each conforms, and at the time of filing of the Prospectus
         pursuant to Rule 424(b) or (if no such filing is required) at the
         Effective Date of the Additional Registration Statement in which the
         Prospectus is included, each Registration Statement and the Prospectus
         will conform, in all material respects to the requirements of the Act
         and the Rules and Regulations, and neither of such documents includes,
         or will include, any untrue statement of a material fact or omits, or
         will omit, to state any material fact required to be stated therein or
         necessary to make the statements therein not misleading. If the
         Effective Time of the Initial Registration Statement is subsequent to
         the execution and delivery of this Agreement: on the Effective Date of
         the Initial Registration Statement, the Initial Registration Statement
         and the Prospectus will conform in all material respects to the
         requirements of the Act and the Rules and Regulations, neither of such
         documents will include any untrue statement of a material fact or will
         omit to state any material fact required to be stated therein or
         necessary to make the statements therein not misleading, and no
         Additional Registration Statement has been or will be filed. The two
         preceding sentences do not apply to statements in or omissions from a
         Registration Statement or the Prospectus based upon written information
         furnished to the Company by any Underwriter through the Representatives
         specifically for use therein, it being understood and agreed that the
         only such information is that described as such in Section 7(b) hereof.

            (c) The Company has been duly incorporated and is an existing
         corporation in good standing under the laws of the State of Delaware,
         with power and authority (corporate and other) to own its properties
         and conduct its business as described in the Prospectus; and the
         Company is duly qualified to do business as a foreign corporation in
         good standing in all other jurisdictions in which its ownership or
         lease of property or the conduct of its business requires such
         qualification except where the failure to be so qualified would not
         have a Material Adverse Effect (as hereinafter defined).

            (d) Each subsidiary of the Company has been duly incorporated and is
         an existing corporation in good standing under the laws of the
         jurisdiction of its incorporation, with


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         power and authority (corporate and other) to own its properties and
         conduct its business as described in the Prospectus; and each
         subsidiary of the Company is duly qualified to do business as a foreign
         corporation in good standing in all other jurisdictions in which its
         ownership or lease of property or the conduct of its business requires
         such qualification, except where the failure to be so qualified would
         not have a Material Adverse Effect; all of the issued and outstanding
         capital stock of each subsidiary of the Company has been duly
         authorized and validly issued and is fully paid and nonassessable; and
         the capital stock of each subsidiary owned by the Company, directly or
         through subsidiaries, is owned free from liens, encumbrances and
         defects, except for liens in favor of Comerica Bank California and
         Phoenix Leasing and their assignees.

            (e) The Offered Securities and all other outstanding shares of
         capital stock of the Company have been duly authorized; all outstanding
         shares of capital stock of the Company are, and, when the Offered
         Securities have been delivered and paid for in accordance with this
         Agreement on each Closing Date (as defined below), such Offered
         Securities will have been, validly issued, fully paid and nonassessable
         and such Offered Securities will conform in all material respects to
         the description thereof contained in the Prospectus; and the
         stockholders of the Company have no preemptive rights with respect to
         the Securities.

            (f) There are no contracts, agreements or understandings between the
         Company and any person that would give rise to a valid claim against
         the Company or any Underwriter for a brokerage commission, finder's fee
         or other like payment in connection with this offering.

            (g) Except as disclosed in the Prospectus, there are no contracts,
         agreements or understandings between the Company and any person
         granting such person the right to require the Company to file a
         registration statement under the Act with respect to any securities of
         the Company owned or to be owned by such person or to require the
         Company to include such securities in the securities registered
         pursuant to a Registration Statement or in any securities being
         registered pursuant to any other registration statement filed by the
         Company under the Act, other than those that have been waived in
         writing.

            (h) The Offered Securities have been approved for listing on The
         Nasdaq Stock Market's National Market subject to notice of issuance.

            (i) No consent, approval, authorization, or order of, or filing
         with, any governmental agency or body or any court is required for the
         consummation of the transactions contemplated by this Agreement in
         connection with the issuance and sale of the Offered Securities by the
         Company, except such as have been obtained and made under the Act and
         such as may be required under state securities laws or Blue Sky laws or
         the by-laws or rules and regulations of the National Association of
         Securities Dealers, Inc. (the "NASD").

            (j) The execution, delivery and performance of this Agreement, and
         the issuance and sale of the Offered Securities will not result in a
         breach or violation of (A) any of the terms and provisions of, or
         constitute a default under, any statute, any rule, regulation or order
         of any governmental agency or body or any court, domestic or foreign,
         having jurisdiction over the Company or any subsidiary of the Company
         or any of their


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         properties, or any agreement or instrument to which the Company or any
         such subsidiary is a party or by which the Company or any such
         subsidiary is bound or to which any of the properties of the Company or
         any such subsidiary is subject, or (B) the charter or by-laws of the
         Company or any such subsidiary except in the case of (A) for such
         violations that would not have a Material Adverse Effect, and the
         Company has full power and authority to authorize, issue and sell the
         Offered Securities as contemplated by this Agreement.

            (k) This Agreement has been duly authorized, executed and delivered
         by the Company.

            (l) The Company and its subsidiaries have good and marketable title
         to all real properties and all other properties and assets owned by
         them, in each case free from liens, encumbrances and defects that would
         materially affect the value thereof or materially interfere with the
         use made or to be made thereof by them; and except for liens in favor
         of Comerica Bank California and Phoenix Leasing and their assignees,
         the Company and its subsidiaries hold any leased real or personal
         property under valid and enforceable leases with no exceptions that
         would materially interfere with the use made or to be made thereof by
         them.

            (m) The Company and its subsidiaries possess adequate certificates,
         authorities or permits issued by appropriate governmental agencies or
         bodies necessary to conduct the business now operated by them and have
         not received any notice of proceedings relating to the revocation or
         modification of any such certificate, authority or permit that, if
         determined adversely to the Company or any of its subsidiaries, would
         individually or in the aggregate have a material adverse effect on the
         condition (financial or other), business, properties or results of
         operations of the Company and its subsidiaries taken as a whole
         ("MATERIAL ADVERSE EFFECT").

            (n) No labor dispute with the employees of the Company or any
         subsidiary exists or, to the knowledge of the Company, is imminent that
         might have a Material Adverse Effect.

            (o) The Company and its subsidiaries own or possess adequate
         trademarks, trade names and other rights to inventions, know-how,
         patents, copyrights, confidential information and other intellectual
         property (collectively, "INTELLECTUAL PROPERTY RIGHTS") necessary to
         conduct the business now operated by them, or presently employed by
         them, and have not received any notice of infringement of or notice of
         conflict with asserted rights of others with respect to any
         intellectual property rights that, if determined adversely to the
         Company or any of its subsidiaries, would individually or in the
         aggregate have a Material Adverse Effect. The Company represents and
         warrants that, to the best of its knowledge, its services and products
         (and any underlying technology related thereto) do not infringe any
         U.S. or foreign patent, copyright, trade secret, trademark or other
         proprietary right of any third party or otherwise conflict with the
         rights of any third party.

            (p) Neither the Company nor any of its subsidiaries is in violation
         of any statute, any rule, regulation, decision or order of any
         governmental agency or body or any court, domestic or foreign, relating
         to the use, disposal or release of hazardous or toxic substances or
         relating to the protection or restoration of the environment or human


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         exposure to hazardous or toxic substances (collectively, "ENVIRONMENTAL
         LAWS"), owns or operates any real property contaminated with any
         substance that is subject to any environmental laws, is liable for any
         off-site disposal or contamination pursuant to any environmental laws,
         or is subject to any claim relating to any environmental laws, which
         violation, contamination, liability or claim would individually or in
         the aggregate have a Material Adverse Effect; and the Company is not
         aware of any pending investigation which might lead to such a claim.

            (q) There are no pending actions, suits or proceedings against or to
         its knowledge affecting the Company, any of its subsidiaries or any of
         their respective properties that, if determined adversely to the
         Company or any of its subsidiaries, would individually or in the
         aggregate have a Material Adverse Effect, or would materially and
         adversely affect the ability of the Company to perform its obligations
         under this Agreement, or which are otherwise material in the context of
         the sale of the Offered Securities; and no such actions, suits or
         proceedings are threatened or, to the Company's knowledge, contemplated
         against the Company and its subsidiaries.

            (r) The financial statements included in each Registration Statement
         and the Prospectus present fairly the financial position of the Company
         and its consolidated subsidiaries as of the dates shown and their
         results of operations and cash flows for the periods shown, and such
         financial statements have been prepared in conformity with the
         generally accepted accounting principles in the United States applied
         on a consistent basis throughout the periods covered and the schedules
         included in each Registration Statement present fairly the information
         required to be stated therein; and the assumptions used in preparing
         the pro forma financial statements included in each Registration
         Statement and the Prospectus provide a reasonable basis for presenting
         the significant effects directly attributable to the transactions or
         events described therein, the related pro forma adjustments give
         appropriate effect to those assumptions, and the pro forma columns
         therein reflect the proper application of those adjustments to the
         corresponding historical financial statement amounts.

            (s) Except as disclosed in the Prospectus, since the date of the
         latest audited financial statements included in the Prospectus there
         has been no material adverse change, nor any development or event
         involving a prospective material adverse change, in the condition
         (financial or other), business, properties or results of operations of
         the Company and its subsidiaries taken as a whole, and, except as
         disclosed in or contemplated by the Prospectus, there has been no
         dividend or distribution of any kind declared, paid or made by the
         Company on any class of its capital stock.

            (t) The Company is not and, after giving effect to the offering and
         sale of the Offered Securities and the application of the proceeds
         thereof as described in the Prospectus, will not be an "investment
         company" as defined in the Investment Company Act of 1940, as amended.

            (u) The Company represents and warrants to the Underwriters that (i)
         the Registration Statement, the Prospectus and any preliminary
         prospectus comply, and any further amendments or supplements thereto
         will comply, with any applicable laws or regulations of foreign
         jurisdictions in which the Prospectus or any preliminary prospectus, as
         amended or supplemented, if applicable, are distributed in connection
         with


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         the Directed Share Program, and that (ii) no authorization, approval,
         consent, license, order, registration or qualification of or with any
         government, governmental instrumentality or court, other than such as
         have been obtained or will be obtained if necessary, is necessary under
         the securities law and regulations of foreign jurisdictions in which
         the Directed Shares are offered outside the United States.

            (v) The Company has not offered, or caused the Underwriters to
         offer, any Offered Securities to any person pursuant to the Directed
         Share Program with the specific intent to unlawfully influence (i) a
         customer or supplier of the Company to alter the customer's or
         supplier's level or type of business with the Company or (ii) a trade
         journalist or publication to write or publish favorable information
         about the Company or its products.

            (w) The Company maintains a system of internal accounting controls
         sufficient to provide assurance that (i) transactions are executed in
         accordance with management's general or specific authorizations; (ii)
         transactions are recorded as necessary to permit preparation of
         financial statements in conformity with GAAP and to maintain asset
         accountability; and (iii) the recorded accountability for assets is
         compared with the existing assets at reasonable intervals and
         appropriate action is taken with respect to any differences.

            (x) The Company and each of its subsidiaries has filed all material
         foreign, federal, state and local tax returns that are required to be
         filed or has requested extensions thereof and has paid all material
         taxes required to be paid by it and any other material assessment, fine
         or penalty levied against it, to the extent that any of the foregoing
         is due and payable, except for any such assessment, fine or penalty
         that is currently being contested in good faith.

            (y) The Company and each of its subsidiaries is insured by insurers
         of recognized financial responsibility against such losses and risks
         and in such amounts as are reasonable and customary in the business in
         which it is engaged; neither the Company nor any of its subsidiaries
         has been refused any insurance coverage sought or applied for; and
         neither the Company nor any of its subsidiaries has reason to believe
         that it will not be able to renew its existing insurance coverage as
         and when such coverage expires or to obtain similar coverage from
         similar insurers as may be necessary to continue its business at a cost
         that would not have a Material Adverse Effect.

            (z) The Company has reviewed its operations and that of its
         subsidiaries and any third parties with which the Company or any of its
         subsidiaries has a material relationship to evaluate the extent to
         which the business or operations of the Company or any of its
         subsidiaries will be effected by the Year 2000 Problem. As a result of
         such review, the Company has no reason to believe, and does not
         believe, that the Year 2000 Problem will have a Material Adverse Effect
         or result in any material loss or interference with the Company's
         business or operations. The "YEAR 2000 PROBLEM" as used herein means
         any significant risk that computer hardware or software used in the
         receipt, transmission, processing, manipulation, storage, retrieval,
         retransmission or other utilization of date or in the operation of
         mechanical or electrical systems of any kind will not, in the case of
         dates or time periods occurring after December 31,1999, function at
         least as effectively as in the case of dates or time periods occurring
         prior to January 1, 2000.


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         3. Purchase, Sale and Delivery of Offered Securities. On the basis of
the representations, warranties and agreements herein contained, but subject to
the terms and conditions herein set forth, the Company agrees to sell to the
Underwriters, and the Underwriters agree, severally and not jointly, to purchase
from the Company, at a purchase price of $       per share, the respective
numbers of shares of Firm Securities set forth opposite the names of the
Underwriters in Schedule A hereto.

         The Company will deliver the Firm Securities to the Representatives for
the accounts of the Underwriters, against payment of the purchase price in
Federal (same day) funds by official bank check or checks or wire transfer to an
account at a bank acceptable to Credit Suisse First Boston Corporation ("CSFBC")
drawn to the order of the Company at the designated office of [Brobeck, Phleger
& Harrison LLP], at 10:00A.M., New York time, on June, 2000, or at such other
time not later than seven full business days thereafter as CSFBC and the Company
determine, such time being herein referred to as the "FIRST CLOSING DATE". For
purposes of Rule 15c6-1 under the Securities Exchange Act of 1934, the First
Closing Date (if later than the otherwise applicable settlement date) shall be
the settlement date for payment of funds and delivery of securities for all the
Offered Securities sold pursuant to the offering. The certificates for the Firm
Securities to be so delivered will be in definitive form, in such denominations
and registered in such names as CSFBC requests and will be made available for
checking and packaging at the designated office of [Brobeck, Phleger & Harrison
LLP] at least 24 hours prior to the First Closing Date.

         In addition, upon written notice from CSFBC given to the Company from
time to time not more than 30 days subsequent to the date of the Prospectus, the
Underwriters may purchase all or less than all of the Optional Securities at the
purchase price per Security to be paid for the Firm Securities. The Company
agrees to sell to the Underwriters the number of shares of Optional Securities
specified in such notice and the Underwriters agree, severally and not jointly,
to purchase such Optional Securities. Such Optional Securities shall be
purchased for the account of each Underwriter in the same proportion as the
number of shares of Firm Securities set forth opposite such Underwriter's name
bears to the total number of shares of Firm Securities (subject to adjustment by
CSFBC to eliminate fractions) and may be purchased by the Underwriters only for
the purpose of covering over-allotments made in connection with the sale of the
Firm Securities. No Optional Securities shall be sold or delivered unless the
Firm Securities previously have been, or simultaneously are, sold and delivered.
The right to purchase the Optional Securities or any portion thereof may be
exercised from time to time and to the extent not previously exercised may be
surrendered and terminated at any time upon notice by CSFBC to the Company.

         Each time for the delivery of and payment for the Optional Securities,
being herein referred to as an "OPTIONAL CLOSING DATE", which may be the First
Closing Date (the First Closing Date and each Optional Closing Date, if any,
being sometimes referred to as a "CLOSING DATE"), shall be determined by CSFBC
but shall be not later than five full business days after written notice of
election to purchase Optional Securities is given. The Company will deliver the
Optional Securities being purchased on each Optional Closing Date to the
Representatives for the accounts of the several Underwriters, against payment of
the purchase price therefor in Federal (same day) funds by official bank check
or checks or wire transfer to an account at a bank acceptable to CSFBC drawn to
the order of the Company , at the designated office of [Brobeck, Phleger &
Harrison LLP]. The certificates for the Optional Securities being purchased on
each Optional Closing Date will be in definitive form, in such denominations and
registered in such names as CSFBC requests upon reasonable notice prior to such
Optional Closing Date and will be


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made available for checking and packaging at the designated office of [Brobeck,
Phleger & Harrison LLP] at a reasonable time in advance of such Optional Closing
Date.

         4. Offering by Underwriters. It is understood that the several
Underwriters propose to offer the Offered Securities for sale to the public as
set forth in the Prospectus.

         5. Certain Agreements of the Company. The Company agrees with the
several Underwriters that:

            (a) If the Effective Time of the Initial Registration Statement is
         prior to the execution and delivery of this Agreement, the Company will
         file the Prospectus with the Commission pursuant to and in accordance
         with subparagraph (1) (or, if applicable and if consented to by CSFBC,
         subparagraph (4)) of Rule 424(b) not later than the earlier of (A) the
         second business day following the execution and delivery of this
         Agreement or (B) the fifteenth business day after the Effective Date of
         the Initial Registration Statement.

         The Company will advise CSFBC promptly of any such filing pursuant to
         Rule 424(b). If the Effective Time of the Initial Registration
         Statement is prior to the execution and delivery of this Agreement and
         an additional registration statement is necessary to register a portion
         of the Offered Securities under the Act but the Effective Time thereof
         has not occurred as of such execution and delivery, the Company will
         file the additional registration statement or, if filed, will file a
         post-effective amendment thereto with the Commission pursuant to and in
         accordance with Rule 462(b) on or prior to 10:00 P.M., New York time,
         on the date of this Agreement or, if earlier, on or prior to the time
         the Prospectus is printed and distributed to any Underwriter, or will
         make such filing at such later date as shall have been consented to by
         CSFBC.

            (b) The Company will advise CSFBC promptly of any proposal to amend
         or supplement the initial or any additional registration statement as
         filed or the related prospectus or the Initial Registration Statement,
         the Additional Registration Statement (if any) or the Prospectus and
         will not effect such amendment or supplementation without CSFBC's
         consent; and the Company will also advise CSFBC promptly of the
         effectiveness of each Registration Statement (if its Effective Time is
         subsequent to the execution and delivery of this Agreement) and of any
         amendment or supplementation of a Registration Statement or the
         Prospectus and of the institution by the Commission of any stop order
         proceedings in respect of a Registration Statement and will use its
         best efforts to prevent the issuance of any such stop order and to
         obtain as soon as possible its lifting, if issued.

            (c) If, at any time when a prospectus relating to the Offered
         Securities is required to be delivered under the Act in connection with
         sales by any Underwriter or dealer, any event occurs as a result of
         which the Prospectus as then amended or supplemented would include an
         untrue statement of a material fact or omit to state any material fact
         necessary to make the statements therein, in the light of the
         circumstances under which they were made, not misleading, or if it is
         necessary at any time to amend the Prospectus to comply with the Act,
         the Company will promptly notify CSFBC of such event and will promptly
         prepare and file with the Commission, at its own expense, an amendment
         or supplement which will correct such statement or omission or an
         amendment which will effect such compliance. Neither CSFBC's consent
         to, nor the Underwriters' delivery of, any such


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         amendment or supplement shall constitute a waiver of any of the
         conditions set forth in Section 6.

            (d) As soon as practicable, but not later than the Availability Date
         (as defined below), the Company will make generally available to its
         securityholders an earnings statement covering a period of at least 12
         months beginning after the Effective Date of the Initial Registration
         Statement (or, if later, the Effective Date of the Additional
         Registration Statement) which will satisfy the provisions of Section
         11(a) of the Act. For the purpose of the preceding sentence,
         "AVAILABILITY DATE" means the 45th day after the end of the fourth
         fiscal quarter following the fiscal quarter that includes such
         Effective Date, except that, if such fourth fiscal quarter is the last
         quarter of the Company's fiscal year, "AVAILABILITY DATE" means the
         90th day after the end of such fourth fiscal quarter.

            (e) The Company will furnish to the Representatives copies of each
         Registration Statement (four of which will be signed and will include
         all exhibits), each related preliminary prospectus, and, so long as a
         prospectus relating to the Offered Securities is required to be
         delivered under the Act in connection with sales by any Underwriter or
         dealer, the Prospectus and all amendments and supplements to such
         documents, in each case in such quantities as CSFBC requests. The
         Prospectus shall be so furnished on or prior to 3:00 P.M., New York
         time, on the business day following the later of the execution and
         delivery of this Agreement or the Effective Time of the Initial
         Registration Statement. All other documents shall be so furnished as
         soon as available. The Company will pay the expenses of printing and
         distributing to the Underwriters all such documents.

            (f) The Company will arrange for the qualification of the Offered
         Securities for sale under the laws of such jurisdictions as CSFBC
         designates and will continue such qualifications in effect so long as
         required for the distribution.

            (g) During the period of five years hereafter, the Company will
         furnish to the Representatives and, upon request, to each of the other
         Underwriters, as soon as practicable after the end of each fiscal year,
         a copy of its annual report to stockholders for such year; and the
         Company will furnish to the Representatives (i) as soon as available, a
         copy of each report and any definitive proxy statement of the Company
         filed with the Commission under the Securities Exchange Act of 1934, as
         amended, or mailed to stockholders, and (ii) from time to time, such
         other information concerning the Company as CSFBC may reasonably
         request.

            (h) The Company will pay all expenses incident to the performance of
         its obligations under this Agreement, for any filing fees and other
         expenses (including fees and disbursements of counsel) incurred in
         connection with qualification of the Offered Securities for sale under
         the laws of such jurisdictions as CSFBC designates and the printing of
         memoranda relating thereto for the filing fee incident to, and the
         reasonable fees and disbursements of counsel to the Underwriters in
         connection with, the review by the NASD of the Offered Securities, for
         any travel expenses of the Company's officers and employees and any
         other expenses of the Company in connection with attending or hosting
         meetings with prospective purchasers of the Offered Securities and for
         expenses incurred in distributing preliminary prospectuses and the
         Prospectus (including any amendments and supplements thereto) to the
         Underwriters.


                                       10


<PAGE>   11

            (i) For a period of 180 days after the date of the initial public
         offering of the Offered Securities, the Company will not offer, sell,
         contract to sell, pledge or otherwise dispose of, directly or
         indirectly, or file with the Commission a registration statement under
         the Act relating to, any additional shares of its Securities or
         securities convertible into or exchangeable or exercisable for any
         shares of its Securities, or publicly disclose the intention to make
         any such offer, sale, pledge, disposition or filing, without the prior
         written consent of CSFBC except issuances of Securities pursuant to the
         conversion or exchange of convertible or exchangeable securities or the
         exercise of warrants or options, in each case outstanding on the date
         hereof, grants of employee stock options pursuant to the terms of a
         plan in effect on the date hereof, issuances of Securities pursuant to
         the exercise of such options or the exercise of any other employee
         stock options outstanding on the date hereof or issuances of Securities
         pursuant to the Company's dividend reinvestment plan.

            (j) In connection with the Directed Share Program, the Company will
         ensure that the Directed Shares will be restricted to the extent
         required by the NASD or the NASD rules from sale, transfer, assignment,
         pledge or hypothecation for a period of three months following the date
         of the effectiveness of the Registration Statement. The Designated
         Underwriter will notify the Company as to which Participants will need
         to be so restricted. The Company will direct the transfer agent to
         place stop transfer restrictions upon such securities for such period
         of time.

            (k) The Company will pay all fees and disbursements of counsel
         incurred by the Underwriters in connection with the Directed Shares
         Program and stamp duties, similar taxes or duties or other taxes, if
         any, incurred by the underwriters in connection with the Directed Share
         Program.

            Furthermore, the Company covenants with the Underwriters that the
         Company will comply with all applicable securities and other applicable
         laws, rules and regulations in each foreign jurisdiction in which the
         Directed Shares are offered in connection with the Directed Share
         Program.

         6. Conditions of the Obligations of the Underwriters. The obligations
of the several Underwriters to purchase and pay for the Firm Securities on the
First Closing Date and the Optional Securities to be purchased on each Optional
Closing Date will be subject to the accuracy of the representations and
warranties on the part of the Company herein, to the accuracy of the statements
of Company officers made pursuant to the provisions hereof, to the performance
by the Company of its obligations hereunder and to the following additional
conditions precedent:

            (a) The Representatives shall have received a letter, dated the date
         of delivery thereof (which, if the Effective Time of the Initial
         Registration Statement is prior to the execution and delivery of this
         Agreement, shall be on or prior to the date of this Agreement or, if
         the Effective Time of the Initial Registration Statement is subsequent
         to the execution and delivery of this Agreement, shall be prior to the
         filing of the amendment or post-effective amendment to the registration
         statement to be filed shortly prior to such Effective Time), of
         PricewaterhouseCoopers LLP confirming that they are independent public
         accountants within the meaning of the Act and the applicable published
         Rules and Regulations thereunder and stating to the effect that:


                                       11

<PAGE>   12

                 (i) in their opinion the financial statements and schedules
            examined by them and included in the Registration Statements comply
            as to form in all material respects with the applicable accounting
            requirements of the Act and the related published Rules and
            Regulations;

                 (ii) they have performed the procedures specified by the
            American Institute of Certified Public Accountants for a review of
            interim financial information as described in Statement of Auditing
            Standards No. 71, Interim Financial Information, on the unaudited
            financial statements included in the Registration Statements;

                 (iii) on the basis of the review referred to in clause (ii)
            above, a reading of the latest available interim financial
            statements of the Company, inquiries of officials of the Company who
            have responsibility for financial and accounting matters and other
            specified procedures, nothing came to their attention that caused
            them to believe that:

                      (A) the unaudited financial statements included in the
                 Registration Statements do not comply as to form in all
                 material respects with the applicable accounting requirements
                 of the Act and the related published Rules and Regulations or
                 any material modifications should be made to such unaudited
                 financial statements for them to be in conformity with
                 generally accepted accounting principles;

                      (B) at the date of the latest available balance sheet read
                 by such accountants, or at a subsequent specified date not more
                 than three business days prior to the date of such letter,
                 there was any change in the capital stock or any increase in
                 short-term indebtedness or long-term debt of the Company and
                 its consolidated subsidiaries or, at the date of the latest
                 available balance sheet read by such accountants, there was any
                 decrease in consolidated net current assets or net assets, as
                 compared with amounts shown on the latest balance sheet
                 included in the Prospectus; or

                      (C) for the period from the closing date of the latest
                 income statement included in the Prospectus to the closing date
                 of the latest available income statement read by such
                 accountants there were any decreases, as compared with the
                 corresponding period of the previous year and with the period
                 of corresponding length ended the date of the latest income
                 statement included in the Prospectus, in consolidated net
                 sales, net operating income or in the total or per share
                 amounts of consolidated income before extraordinary items or
                 net income.

            except in all cases set forth in clauses (B) and (C) above for
            changes, increases or decreases which the Prospectus discloses have
            occurred or may occur or which are described in such letter; and

                 (iv) they have compared specified dollar amounts (or
            percentages derived from such dollar amounts) and other financial
            information contained in the Registration Statements (in each case
            to the extent that such dollar amounts,


                                       12


<PAGE>   13

            percentages and other financial information are derived from the
            general accounting records of the Company and its subsidiaries
            subject to the internal controls of the Company's accounting system
            or are derived directly from such records by analysis or
            computation) with the results obtained from inquiries, a reading of
            such general accounting records and other procedures specified in
            such letter and have found such dollar amounts, percentages and
            other financial information to be in agreement with such results,
            except as otherwise specified in such letter.

         For purposes of this subsection, (i) if the Effective Time of the
         Initial Registration Statement is subsequent to the execution and
         delivery of this Agreement, "REGISTRATION STATEMENTS" shall mean the
         initial registration statement as proposed to be amended by the
         amendment or post-effective amendment to be filed shortly prior to its
         Effective Time, (ii) if the Effective Time of the Initial Registration
         Statement is prior to the execution and delivery of this Agreement but
         the Effective Time of the Additional Registration is subsequent to such
         execution and delivery, "REGISTRATION STATEMENTS" shall mean the
         Initial Registration Statement and the additional registration
         statement as proposed to be filed or as proposed to be amended by the
         post-effective amendment to be filed shortly prior to its Effective
         Time, and (iii) "PROSPECTUS" shall mean the prospectus included in the
         Registration Statements.

            (b) If the Effective Time of the Initial Registration Statement is
         not prior to the execution and delivery of this Agreement, such
         Effective Time shall have occurred not later than 10:00 P.M., New York
         time, on the date of this Agreement or such later date as shall have
         been consented to by CSFBC. If the Effective Time of the Additional
         Registration Statement (if any) is not prior to the execution and
         delivery of this Agreement, such Effective Time shall have occurred not
         later than 10:00 P.M., New York time, on the date of this Agreement or,
         if earlier, the time the Prospectus is printed and distributed to any
         Underwriter, or shall have occurred at such later date as shall have
         been consented to by CSFBC. If the Effective Time of the Initial
         Registration Statement is prior to the execution and delivery of this
         Agreement, the Prospectus shall have been filed with the Commission in
         accordance with the Rules and Regulations and Section 5(a) of this
         Agreement. Prior to such Closing Date, no stop order suspending the
         effectiveness of a Registration Statement shall have been issued and no
         proceedings for that purpose shall have been instituted or, to the
         knowledge of the Company or the Representatives, shall be contemplated
         by the Commission.

            (c) Subsequent to the execution and delivery of this Agreement,
         there shall not have occurred (i) any change, or any development or
         event involving a prospective change, in the condition (financial or
         other), business, properties or results of operations of the Company
         and its subsidiaries taken as one enterprise which, in the judgment of
         a majority in interest of the Underwriters including the
         Representatives, is material and adverse and makes it impractical or
         inadvisable to proceed with completion of the public offering or the
         sale of and payment for the Offered Securities; (ii) any material
         suspension or material limitation of trading in securities generally on
         the New York Stock Exchange or any setting of minimum prices for
         trading on such exchange, or any suspension of trading of any
         securities of the Company on any exchange or in the over-the-counter
         market; (iii) any banking moratorium declared by U.S. Federal or New
         York authorities; or (iv) any outbreak or escalation of major
         hostilities in which the United States is involved, any declaration of
         war by Congress or any other substantial national or


                                       13


<PAGE>   14

         international calamity or emergency if, in the judgment of a majority
         in interest of the Underwriters including the Representatives, the
         effect of any such outbreak, escalation, declaration, calamity or
         emergency makes it impractical or inadvisable to proceed with
         completion of the public offering or the sale of and payment for the
         Offered Securities.

            (d) The Representatives shall have received an opinion, dated such
         Closing Date, of Brobeck, Phleger & Harrison LLP, counsel for the
         Company, to the effect that:

                (i) the Company is duly incorporated and is validly existing
                    and in good standing under the laws of the State of
                    Delaware; the Company has the corporate power and authority
                    to own its properties and to conduct its business as
                    described in the Prospectus; and the Company is duly
                    qualified to do business as a foreign corporation in good
                    standing in the jurisdictions listed on the attached
                    schedule to the opinion;

               (ii) the authorized, issued and outstanding capital stock of
                    the Company as of March 31, 2000 is as set forth under the
                    heading "Actual" under the caption "Capitalization" in the
                    Prospectus; to the knowledge of such counsel, except as
                    described in the Prospectus, there are no outstanding
                    securities of the Company convertible or exchangeable into,
                    or evidencing the right to purchase or subscribe for, any
                    shares of capital stock of the Company and there are no
                    outstanding or authorized options, warrants or rights of a
                    similar character obligating the Company to issue any shares
                    of its capital stock or any securities convertible or
                    exchangeable into, or evidencing the right to purchase or
                    subscribe for, any shares of such stock;

              (iii) all the shares of capital stock of the Company outstanding
                    prior to the issuance of the Offered Securities have been
                    duly authorized and validly issued, and are to the knowledge
                    of such counsel fully paid and nonassessable and conforms to
                    the description thereof contained in the Prospectus;

               (iv) the Offered Securities have been duly authorized and, when
                    issued and delivered to the Underwriters against payment
                    therefor in accordance with the terms of the Underwriting
                    Agreement, will be validly issued, fully paid and
                    nonassessable and free of any (A) preemptive rights arising
                    under the Restated Certificate or the Delaware General
                    Corporation Law or (B) to the knowledge of such counsel,
                    similar rights that entitle or will entitle any person to
                    acquire any shares of capital stock of the Company upon the
                    issuance and sale of the Offered Securities by the Company;

                (v) the Registration Statement and all post-effective
                    amendments, if any, have become effective under the Act and,
                    to the knowledge of such counsel, no stop order suspending
                    the effectiveness of the Registration Statement has been
                    issued and no proceedings


                                       14


<PAGE>   15

                    for that purpose are pending before or contemplated by the
                    Commission; and any required filing of the Prospectus
                    pursuant to Rule 424(b) has been made in accordance with
                    Rule 424(b);

               (vi) the Company has the corporate power and authority to enter
                    into the Underwriting Agreement and to issue, sell and
                    deliver the Offered Securities to the Underwriters as
                    provided in the Underwriting Agreement; the Underwriting
                    Agreement has been duly authorized, executed and delivered
                    by the Company;

              (vii) neither the offer, sale or delivery of the Offered
                    Securities nor the execution, delivery or performance by the
                    Company of the Underwriting Agreement, (A) violates the
                    Restated Certificate or the Bylaws, or other organizational
                    documents, of the Company, or (B) constitutes a breach of,
                    or a default under, any agreement, indenture, lease or other
                    instrument to which the Company is a party or by which the
                    Company or any of its properties is bound that is an exhibit
                    to the Registration Statement (C) will result in any
                    violation of any existing law or regulation (other than
                    applicable state securities and Blue Sky laws, as to which
                    we express no opinion), or any ruling, judgment, injunction,
                    order or decree known to us and applicable to the Company or
                    any of its properties;

             (viii) no consent, approval, authorization or other order of, or
                    filing with, any court, or other governmental body or
                    governmental agency is required on the part of the Company
                    (except (A) as have been obtained under the Act and the
                    Exchange Act or (B) such as may be required under state
                    securities or Blue Sky laws governing the purchase and
                    distribution of the Offered Securities, as to which we
                    express no opinion) for the valid issuance and sale of the
                    Offered Securities to the Underwriters as contemplated by
                    the Underwriting Agreement;

               (ix) to the knowledge of such counsel, (A) there are no legal
                    or governmental proceedings pending or threatened against
                    the Company, or to which the Company or any of its
                    properties is subject, which are required to be described in
                    the Registration Statement or Prospectus (or any amendment
                    or supplement thereto) that are not so described and (B)
                    there are no agreements, contracts, indentures, leases or
                    other instruments that are required to be described in the
                    Registration Statement or the Prospectus (or any amendment
                    or supplement thereto) or to be filed as an exhibit to the
                    Registration Statement that are not so described or filed,
                    as the case may be;

                (x) to the knowledge of such counsel there are no threatened or
                    pending actions, suits or proceedings against or affecting
                    the Company, any of its subsidiaries or any of their
                    respective properties that, if determined adversely to the
                    Company or any


                                       15


<PAGE>   16

                    of its subsidiaries, would individually or in the aggregate
                    have a Material Adverse Effect, or would materially and
                    adversely affect the ability of the Company to perform its
                    obligations under the Underwriting Agreement, or which are
                    otherwise material in the context of the sale of the Offered
                    Securities;

               (xi) to the knowledge of such counsel, except as described in
                    the Prospectus, no holder of any securities of the Company
                    or any other person has the right, contractual or otherwise,
                    to cause the Company to sell or otherwise issue to them, or
                    to permit them to underwrite the sale of, any of the Offered
                    Securities or the right to have any Common Stock or other
                    securities of the Company included in the Registration
                    Statement or the right, as a result of the filing of the
                    Registration Statement, to require the Company to register
                    under the Securities Act any shares of Common Stock or other
                    securities of the Company, and any registration rights in
                    connection with the offering contemplated hereby have been
                    waived;

              (xii) the statements set forth under the caption "Description
                    of Capital Stock" in the Prospectus, insofar as such
                    statements purport to summarize certain provisions of the
                    capital stock of the Company, provide a fair summary of such
                    provisions in all material respects; the statements set
                    forth under the caption "Certain Transactions" in the
                    Prospectus, insofar as such statements constitute a summary
                    of the legal matters, documents or proceedings referred to
                    therein, provide a fair summary of such legal matters,
                    documents and proceedings in all material respects; and

             (xiii) such counsel has participated in conferences with certain
                    officers and other representatives of the Company, its
                    independent public accountants, the Underwriters and the
                    Underwriters' counsel at which the contents of the
                    Registration Statement, the Prospectus and related matters
                    were discussed. Such counsel is not, however, passing upon,
                    and does not assume any responsibility for, and such counsel
                    has not independently checked or verified, the accuracy,
                    completeness or fairness of the information contained in the
                    Registration Statement and the Prospectus, it being
                    understood that such counsel is not an expert on patent
                    issues and is not passing upon, and does not assume any
                    responsibility for, and such counsel has not independently
                    checked or verified, the accuracy, completeness or fairness
                    of the information contained in the Registration Statement
                    and the Prospectus with respect to such issues. Such counsel
                    may state, however, that based upon its participation as
                    described in the preceding paragraph, (A) it is of the
                    opinion that the Registration Statement and the Prospectus
                    (other than the financial statements, including the notes
                    and schedules thereto, and the


                                       16


<PAGE>   17

                    other financial data and statistical data derived from
                    financial statements included in the Registration Statement
                    and the Prospectus, as to which no opinion expressed), as of
                    the effective date of the Registration Statement, complied
                    as to form in all material respects with the requirements of
                    the Act and the applicable rules and regulations thereunder;
                    (B) it confirms that it has no reason to believe that any
                    part of the Registration Statement (other than the financial
                    statements, including the notes and schedules thereto, and
                    the other financial data and statistical data derived from
                    financial statements included in the Registration Statement,
                    as to which no opinion is expressed), at the time the
                    Registration Statement became effective, contained any
                    untrue statement of a material fact or omitted to state a
                    material fact required to be stated therein or necessary to
                    make the statements therein not misleading; and (C) it
                    confirms that such counsel has no reason to believe that the
                    Prospectus (other than the financial statements, including
                    the notes and schedules thereto, and the other financial
                    data and statistical data derived from financial statements,
                    included in the Prospectus, as to which no opinion is
                    expressed), on the date hereof, contains any untrue
                    statement of a material fact or omits to state a material
                    fact necessary in order to make the statements therein, in
                    light of the circumstances under which they were made, not
                    misleading.

            (e) The Representatives shall have received an opinion, dated such
         Closing Date, of Hale and Dorr LLP, special counsel to the Company, to
         the effect that the Company is not an "investment company" or an entity
         "controlled" by an "investment company" as each of these terms is
         defined in the Investment Company Act of 1940, as amended.

            (f) The Representatives shall have received an opinion, dated such
         Closing Date, of Blakely, Sokoloff, Taylor and Zafman LLP, patent
         counsel for the Company, to the effect that to such counsel's
         knowldege:

                (i) the Company owns or has obtained licenses for all
                    applications relating to the intellectual property described
                    in the Prospectus as being owned or licensed to the Company;

               (ii) except as described in the Prospectus, the Company owns
                    or possesses adequate trademarks, trade names and other
                    rights to inventions, know-how, (including trade secretes
                    and other unpatented and/or unpatentable proprietary or
                    confidential information, systems or procedures), patents,
                    copyrights and other intellectual property necessary to
                    conduct the business now operated by it or as proposed to be
                    operated by it as described in the Prospectus, or presently
                    employed by it, and have not received any notice of
                    infringement of or conflict with asserted rights of others
                    with respect to any intellectual property rights or knows of
                    any facts or circumstances which would render any


                                       17
<PAGE>   18

                    intellectual property of the Company invalid or inadequate
                    to protect the interest of Company;

              (iii) except as described in the Prospectus, there are no pending
                    actions, suits or proceedings against or affecting the
                    Company or any of its properties that, if determined
                    adversely to the Company, would individually or in the
                    aggregate have a Material Adverse Effect, or would
                    materially and adversely affect the ability of the Company
                    to perform its obligations under this Agreement, or which
                    are otherwise material in the context of the sale of the
                    Offered Securities; and, no such actions, suits or
                    proceedings are threatened or, to the Company's knowledge,
                    contemplated;

               (iv) except as described in the Prospectus, the Company has not
                    received any notice of infringement of or conflict with
                    asserted rights of any third party's material patent, patent
                    rights, licenses, inventions, copyrights, know-how,
                    (including trade secrets and other unpatented and/or
                    unpatentable proprietary or confidential information, system
                    or procedures), trademarks, service marks and trade names;
                    and

                (v) the statements in the Prospectus under the captions "Risk
                    Factors - Our Inability to Protect our Intellectual Property
                    will Adversely Affect our Ability to Compete," "--We could
                    become subject to Litigation regarding Intellectual Property
                    Rights which could seriously harm our Business," "Business -
                    Intellectual Property" and other references therein to
                    patent and licensing matters insofar as such statements
                    constitute a summary of legal matters, documents or
                    proceedings referred to therein, are accurate and fairly
                    present the information purported to be shown.

            (g) The Representatives shall have received from Shearman &
         Sterling, counsel for the Underwriters, such opinion or opinions, dated
         such Closing Date, with respect to the incorporation of the Company,
         the validity of the Offered Securities delivered on such Closing Date,
         the Registration Statements, the Prospectus and other related matters
         as the Representatives may require, and the Company shall have
         furnished to such counsel such documents as they request for the
         purpose of enabling them to pass upon such matters.

            (h) The Representatives shall have received a certificate, dated
         such Closing Date, of the President or any Vice President and a
         principal financial or accounting officer of the Company in which such
         officers, to the best of their knowledge after reasonable
         investigation, shall state that: the representations and warranties of
         the Company in this Agreement are true and correct; the Company has
         complied with all agreements and satisfied all conditions on its part
         to be performed or satisfied hereunder at or prior to such Closing
         Date; no stop order suspending the effectiveness of any Registration
         Statement has been issued and no proceedings for that purpose have been
         instituted or are contemplated by the Commission; the Additional
         Registration Statement


                                       19


<PAGE>   19

         (if any) satisfying the requirements of subparagraphs (1) and (3) of
         Rule 462(b) was filed pursuant to Rule 462(b), including payment of the
         applicable filing fee in accordance with Rule 111(a) or (b) under the
         Act, prior to the time the Prospectus was printed and distributed to
         any Underwriter; and, subsequent to the dates of the most recent
         financial statements in the Prospectus, there has been no material
         adverse change, nor any development or event involving a prospective
         material adverse change, in the condition (financial or other),
         business, properties or results of operations of the Company and its
         subsidiaries taken as a whole except as set forth in or contemplated by
         the Prospectus or as described in such certificate.

            (i) The Representatives shall have received a letter, dated such
         Closing Date, of PricewaterhouseCoopers LLP which meets the
         requirements of subsection (a) of this Section, except that the
         specified date referred to in such subsection will be a date not more
         than three days prior to such Closing Date for the purposes of this
         subsection.

            (j) At the date of this Agreement, the Representatives shall have
         received an agreement substantially on the form of Exhibit A hereto
         signed by [substantially] all of the stockholders of the Company.

The Company will furnish the Representatives with such conformed copies of such
opinions, certificates, letters and documents as the Representatives reasonably
requests. CSFBC may in its sole discretion waive on behalf of the Underwriters
compliance with any conditions to the obligations of the Underwriters hereunder,
whether in respect of an Optional Closing Date or otherwise.

         7. Indemnification and Contribution. (a) The Company will indemnify and
hold harmless each Underwriter, its partners, directors and officers and each
person, if any, who controls such Underwriter within the meaning of Section 15
of the Act, against any losses, claims, damages or liabilities, joint or
several, to which such Underwriter may become subject, under the Act or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) arise out of or are based upon any untrue statement or alleged
untrue statement of any material fact contained in any Registration Statement,
the Prospectus, or any amendment or supplement thereto, or any related
preliminary prospectus, or arise out of or are based upon the omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, and will reimburse
each Underwriter for any legal or other expenses reasonably incurred by such
Underwriter in connection with investigating or defending any such loss, claim,
damage, liability or action as such expenses are incurred; provided, however,
that the Company will not be liable in any such case to the extent that any such
loss, claim, damage or liability arises out of or is based upon an untrue
statement or alleged untrue statement in or omission or alleged omission from
any of such documents in reliance upon and in conformity with written
information furnished to the Company by any Underwriter through the
Representatives specifically for use therein, it being understood and agreed
that the only such information furnished by any Underwriter consists of the
information described as such in subsection (b) below; and provided, further,
however, that with respect to any untrue statement or alleged untrue statement
in or omission or alleged omission from any preliminary prospectus, the
foregoing indemnity agreement contained in this subsection (a) shall not inure
to the benefit of any Underwriter from whom the person asserting any losses,
claims, damages or liabilities purchased the Offered Securities concerned, to
the extent that a prospectus relating to such Offered Securities was required to
be delivered by such Underwriter under the Act in connection with such purchase
and any such loss, claim, damage, or liability of such


                                       19


<PAGE>   20

Underwriter results from the fact that there was not sent or given to such
person, at or prior to the written confirmation of the sale of such Offered
Securities to such person, a copy of the Prospectus, if the Company had
previously furnished copies thereof to such Underwriter.

         The Company agrees to indemnify and hold harmless the Designated
Underwriter and each person, if any, who controls the Designated Underwriter
within the meaning of either Section 15 of the Securities Act or Section 20 of
the Exchange Act (the "DESIGNATED ENTITIES"), from and against any and all
losses, claims, damages and liabilities (including, without limitation, any
legal or other expenses reasonably incurred in connection with defending or
investigating any such action or claim) (i) caused by any untrue statement or
alleged untrue statement of a material fact contained in any material prepared
by or with the consent of the Company for distribution to Participants in
connection with the Directed Share Program or caused by any omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading; (ii) caused by the
failure of any Participant to pay for and accept delivery of Directed Shares
that the Participant agreed to purchase; or (iii) related to, arising out of, or
in connection with the Directed Share Program, other than losses, claims,
damages or liabilities (or expenses relating thereto) that are finally
judicially determined to have resulted from the bad faith or gross negligence of
the Designated Entities.

         (b) Each Underwriter will severally and not jointly indemnify and hold
harmless the Company, its directors and officers and each person, if any who
controls the Company within the meaning of Section 15 of the Act, against any
losses, claims, damages or liabilities to which the Company may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon any
untrue statement or alleged untrue statement of any material fact contained in
any Registration Statement, the Prospectus, or any amendment or supplement
thereto, or any related preliminary prospectus, or arise out of or are based
upon the omission or the alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading, in each case to the extent, but only to the extent, that such untrue
statement or alleged untrue statement or omission or alleged omission was made
in reliance upon and in conformity with written information furnished to the
Company by such Underwriter through the Representatives specifically for use
therein, and will reimburse any legal or other expenses reasonably incurred by
the Company in connection with investigating or defending any such loss, claim,
damage, liability or action as such expenses are incurred, it being understood
and agreed that the only such information furnished by any Underwriter consists
of the following information in the Prospectus furnished on behalf of each
Underwriter: the concession and reallowance figures appearing in the fourth
paragraph under the caption "Underwriting" and the information contained in the
sixth, twelfth and fourteenth paragraph under the caption "Underwriting".

         (c) Promptly after receipt by an indemnified party under this Section
of notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against the indemnifying party under
subsection (a) or (b) above, notify the indemnifying party of the commencement
thereof; but the omission so to notify the indemnifying party will not relieve
it from any liability which it may have to any indemnified party otherwise than
under subsection (a) or (b) above. In case any such action is brought against
any indemnified party and it notifies the indemnifying party of the commencement
thereof, the indemnifying party will be entitled to participate therein and, to
the extent that it may wish, jointly with any other indemnifying party similarly
notified, to assume the defense thereof, with counsel satisfactory to such
indemnified party (who shall not, except with the consent of the indemnified
party, be counsel to the indemnifying party), and after notice from the
indemnifying party to such


                                       20


<PAGE>   21

indemnified party of its election so to assume the defense thereof, the
indemnifying party will not be liable to such indemnified party under this
Section for any legal or other expenses subsequently incurred by such
indemnified party in connection with the defense thereof other than reasonable
costs of investigation. Notwithstanding anything contained herein to the
contrary, if indemnity may be sought pursuant to the last paragraph in Section
7(a) hereof in respect of such action or proceeding, then in addition to such
separate firm for the indemnified parties, the indemnifying party shall be
liable for the reasonable fees and expenses of not more than one separate firm
(in addition to any local counsel) for the Designated Underwriter for the
defense of any losses, claims, damages and liabilities arising out of the
Directed Share Program, and all persons, if any, who control the Designated
Underwriter within the meaning of either Section 15 of the Act of Section 20 of
the Exchange Act. No indemnifying party shall, without the prior written consent
of the indemnified party, effect any settlement of any pending or threatened
action in respect of which any indemnified party is or could have been a party
and indemnity could have been sought hereunder by such indemnified party unless
such settlement (i) includes an unconditional release of such indemnified party
from all liability on any claims that are the subject matter of such action and
(ii) does not include a statement as to, or an admission of, fault, culpability
or a failure to act by or on behalf of an indemnified party.

         (d) If the indemnification provided for in this Section is unavailable
or insufficient to hold harmless an indemnified party under subsection (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or
payable by such indemnified party as a result of the losses, claims, damages or
liabilities referred to in subsection (a) or (b) above (i) in such proportion as
is appropriate to reflect the relative benefits received by the Company on the
one hand and the Underwriters on the other from the offering of the Securities
or (ii) if the allocation provided by clause (i) above is not permitted by
applicable law, in such proportion as is appropriate to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault of
the Company on the one hand and the Underwriters on the other in connection with
the statements or omissions which resulted in such losses, claims, damages or
liabilities as well as any other relevant equitable considerations. The relative
benefits received by the Company on the one hand and the Underwriters on the
other shall be deemed to be in the same proportion as the total net proceeds
from the offering (before deducting expenses) received by the Company bear to
the total underwriting discounts and commissions received by the Underwriters.
The relative fault shall be determined by reference to, among other things,
whether the untrue or alleged untrue statement of a material fact or the
omission or alleged omission to state a material fact relates to information
supplied by the Company or the Underwriters and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
untrue statement or omission. The amount paid by an indemnified party as a
result of the losses, claims, damages or liabilities referred to in the first
sentence of this subsection (d) shall be deemed to include any legal or other
expenses reasonably incurred by such indemnified party in connection with
investigating or defending any action or claim which is the subject of this
subsection (d). Notwithstanding the provisions of this subsection (d), no
Underwriter shall be required to contribute any amount in excess of the amount
by which the total price at which the Securities underwritten by it and
distributed to the public were offered to the public exceeds the amount of any
damages which such Underwriter has otherwise been required to pay by reason of
such untrue or alleged untrue statement or omission or alleged omission. No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation. The Underwriters' obligations in
this subsection (d) to contribute are several in proportion to their respective
underwriting obligations and not joint.


                                       21


<PAGE>   22

         (e) The obligations of the Company under this Section shall be in
addition to any liability which the Company may otherwise have and shall extend,
upon the same terms and conditions, to each person, if any, who controls any
Underwriter within the meaning of the Act; and the obligations of the
Underwriters under this Section shall be in addition to any liability which the
respective Underwriters may otherwise have and shall extend, upon the same terms
and conditions, to each director of the Company, to each officer of the Company
who has signed a Registration Statement and to each person, if any, who controls
the Company within the meaning of the Act.

         8. Default of Underwriters. If any Underwriter or Underwriters default
in their obligations to purchase Offered Securities hereunder on either the
First or any Optional Closing Date and the aggregate number of shares of Offered
Securities that such defaulting Underwriter or Underwriters agreed but failed to
purchase does not exceed 10% of the total number of shares of Offered Securities
that the Underwriters are obligated to purchase on such Closing Date, CSFBC may
make arrangements satisfactory to the Company for the purchase of such Offered
Securities by other persons, including any of the Underwriters, but if no such
arrangements are made by such Closing Date, the non-defaulting Underwriters
shall be obligated severally, in proportion to their respective commitments
hereunder, to purchase the Offered Securities that such defaulting Underwriters
agreed but failed to purchase on such Closing Date. If any Underwriter or
Underwriters so default and the aggregate number of shares of Offered Securities
with respect to which such default or defaults occur exceeds 10% of the total
number of shares of Offered Securities that the Underwriters are obligated to
purchase on such Closing Date and arrangements satisfactory to CSFBC and the
Company for the purchase of such Offered Securities by other persons are not
made within 36 hours after such default, this Agreement will terminate without
liability on the part of any non-defaulting Underwriter or the Company, except
as provided in Section 9 (provided that if such default occurs with respect to
Optional Securities after the First Closing Date, this Agreement will not
terminate as to the Firm Securities or any Optional Securities purchased prior
to such termination). As used in this Agreement, the term "Underwriter" includes
any person substituted for an Underwriter under this Section. Nothing herein
will relieve a defaulting Underwriter from liability for its default.

         9. Survival of Certain Representations and Obligations. The respective
indemnities, agreements, representations, warranties and other statements of the
Company or its officers and of the several Underwriters set forth in or made
pursuant to this Agreement will remain in full force and effect, regardless of
any investigation, or statement as to the results thereof, made by or on behalf
of any Underwriter, the Company or any of their respective representatives,
officers or directors or any controlling person, and will survive delivery of
and payment for the Offered Securities. If this Agreement is terminated pursuant
to Section 8 or if for any reason the purchase of the Offered Securities by the
Underwriters is not consummated, the Company shall remain responsible for the
expenses to be paid or reimbursed by it pursuant to Section 5 and the respective
obligations of the Company and the Underwriters pursuant to Section 7 shall
remain in effect, and if any Offered Securities have been purchased hereunder
the representations and warranties in Section 2 and all obligations under
Section 5 shall also remain in effect. If the purchase of the Offered Securities
by the Underwriters is not consummated for any reason other than solely because
of the termination of this Agreement pursuant to Section 8 or the occurrence of
any event specified in clause (iii), (iv) or (v) of Section 6(c), the Company
will reimburse the Underwriters for all out-of-pocket expenses (including fees
and disbursements of counsel) reasonably incurred by them in connection with the
offering of the Offered Securities.


                                       22


<PAGE>   23

         10. Notices. All communications hereunder will be in writing and, if
sent to the Underwriters, will be mailed, delivered or telegraphed and confirmed
to the Representatives, c/o Credit Suisse First Boston Corporation, Eleven
Madison Avenue, New York, NY 10010-3629, Attention: Investment Banking
Department--Transactions Advisory Group, or, if sent to the Company, will be
mailed, delivered or telegraphed and confirmed to it at 301 Science Drive,
Moorpark, CA 93021, Attention: Frederic T. Boyer; provided, however, that any
notice to an Underwriter pursuant to Section 7 will be mailed, delivered or
telegraphed and confirmed to such Underwriter.

         11. Successors. This Agreement will inure to the benefit of and be
binding upon the parties hereto and their respective successors and the officers
and directors and controlling persons referred to in Section 7, and no other
person will have any right or obligation hereunder.

         12. Representation of Underwriters. The Representatives will act for
the several Underwriters in connection with this financing, and any action under
this Agreement taken by the Representatives jointly or by CSFBC will be binding
upon all the Underwriters.

         13. Counterparts. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original, but all such
counterparts shall together constitute one and the same Agreement.

         14. APPLICABLE LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD TO
PRINCIPLES OF CONFLICTS OF LAWS.

         The Company hereby submits to the non-exclusive jurisdiction of the
Federal and state courts in the Borough of Manhattan in The City of New York in
any suit or proceeding arising out of or relating to this Agreement or the
transactions contemplated hereby.


                                       23

<PAGE>   24

         If the foregoing is in accordance with the Representatives'
understanding of our agreement, kindly sign and return to the Company one of the
counterparts hereof, whereupon it will become a binding agreement between the
Company and the several Underwriters in accordance with its terms.

                                            Very truly yours,

                                            ACCELERATED NETWORKS, INC.

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

The foregoing Underwriting Agreement is
  hereby confirmed and accepted as of the
  date first above written.


CREDIT SUISSE FIRST BOSTON CORPORATION
UBS WARBURG LLC
U.S. BANCORP PIPER JAFFRAY INC.


      Acting on behalf of themselves and as
        the Representatives of the several
        Underwriters


By: CREDIT SUISSE FIRST BOSTON CORPORATION

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



                                       24

<PAGE>   25

                                   SCHEDULE A

                                                                      NUMBER OF
             UNDERWRITER                                         FIRM SECURITIES
             -----------                                         ---------------
Credit Suisse First Boston Corporation.......................... [$]

UBS Warburg LLC.................................................

U.S. Bancorp Piper Jaffray Inc.................................



                                                                 ---------------
               Total............................................ [$]
                                                                 ===============

<PAGE>   26

                                    EXHIBIT A

                            Form of Lock-up Agreement

[Insert date]

ACCELERATED NETWORKS
Corporate Headquarters
301 Science Drive
Moorpark, California 93021

CREDIT SUISSE FIRST BOSTON CORPORATION
WARBURG DILLION READ LLC
DAIN RAUSCHER INCORPORATED
 As Representatives of the Several Underwriters
 c/o Credit Suisse First Boston Corporation
     Eleven Madison Avenue
     New York, New York 10010-3629

Ladies and Gentlemen:

         As an inducement to the Underwriters and Managers to execute the
Underwriting Agreement, pursuant to which an offering will be made that is
intended to result in the establishment of a public market for the common
shares, par value * each, (the "Securities") of Accelerated Networks (the
"Company"), the undersigned hereby agrees that from the date hereof and until
180 days after the public offering date set forth on the final prospectus used
to sell the Securities (the "Public Offering Date") pursuant to the Underwriting
Agreement, the undersigned will not offer, sell, contract to sell, pledge or
otherwise dispose of, directly or indirectly, any shares of Securities or
securities convertible into or exchangeable or exercisable for any shares of
Securities, enter into a transaction which would have the same effect, or enter
into any swap, hedge or other arrangement that transfers, in whole or in part,
any of the economic consequences of ownership of the Securities, whether any
such aforementioned transaction is to be settled by delivery of the Securities
or such other securities, in cash or otherwise, or publicly disclose the
intention to make any such offer, sale, pledge or disposition, or to enter into
any such transaction, swap, hedge or other arrangement, without, in each case,
the prior written consent of Credit Suisse First Boston Corporation.

         Any Securities received upon exercise of options granted to the
undersigned will also be subject to this Agreement. Any Securities acquired by
the undersigned in the open market will not be subject to this Agreement. A
transfer of Securities to a family member or trust may be made, provided the
transferee agrees to be bound in writing by the terms of this Agreement.


<PAGE>   27

         In furtherance of the foregoing, the Company and its transfer agent and
registrar are hereby authorized to decline to make any transfer of shares of
Securities if such transfer would constitute a violation or breach of this
Agreement.

         This Agreement shall be binding on the undersigned and the successors,
heirs, personal representatives and assigns of the undersigned. This Agreement
shall lapse and become null and void if the Public Offering Date shall not have
occurred on or before [insert date].

                                               Very truly yours,



                                               ---------------------------------
                                               [Name of stockholder]



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