VINA TECHNOLOGIES INC
S-1/A, EX-1.1, 2000-07-17
TELEPHONE & TELEGRAPH APPARATUS
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                                                                     EXHIBIT 1.1

                             VINA TECHNOLOGIES, INC.

                         FORM OF UNDERWRITING AGREEMENT

                        5,000,000 SHARES OF COMMON STOCK


                                                                  ________, 2000

LEHMAN BROTHERS INC.
THOMAS WEISEL PARTNERS LLC
U.S. BANCORP PIPER JAFFRAY INC.

As Representatives of the several
Underwriters named in Schedule 1,
Three World Financial Center
New York, New York 10285

Dear Sirs and Mesdames:

               VINA Technologies, Inc., a Delaware corporation (the "Company"),
proposes to sell 5,000,000 shares (the "Firm Stock") of the Company's Common
Stock, par value $.0001 per share (the "Common Stock"). In addition, the Company
proposes to grant to the Underwriters named in Schedule 1 hereto (the
"Underwriters") an option to purchase up to an additional 750,000 shares of the
Common Stock on the terms and for the purposes set forth in Section 3 (the
"Option Stock"). The Firm Stock and the Option Stock, if purchased, are
hereinafter collectively called the "Stock." This is to confirm the agreement
concerning the purchase of the Stock from the Company by the Underwriters (the
"Underwriters").

               1. Representations, Warranties and Agreements of the Company. The
Company represents, warrants and agrees that:

                      (a) A registration statement on Form S-1, as amended, with
               respect to the Stock has (i) been prepared by the Company in
               conformity with the requirements of the United States Securities
               Act of 1933, as amended (the "Securities Act"), and the rules and
               regulations (the "Rule and Regulations") of the United States
               Securities and Exchange Commission (the "Commission") thereunder,
               (ii) been filed with the Commission under the Securities Act and
               (iii) become effective under the Securities Act. Copies of such
               registration statement, and the amendments thereto, have been
               delivered by the Company to you as the representatives (the
               "Representatives") of the Underwriters. As used in this
               Agreement, "Effective Time" means the date and the time as of
               which such registration statement, or the most recent
               post-effective amendment thereto, if any, was declared effective
               by the Commission; "Effective Date" means the


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               date of the Effective Time; "Preliminary Prospectus" means each
               prospectus included in such registration statement, or amendments
               thereof, before it became effective under the Securities Act and
               any prospectus filed with the Commission by the Company with the
               consent of the Representatives pursuant to Rule 424(a) of the
               Rules and Regulations; "Registration Statement" means such
               registration statement, as amended at the Effective Time,
               including all information contained in the final prospectus filed
               with the Commission pursuant to Rule 424(b) of the Rules and
               Regulations in accordance with Section hereof and deemed to be a
               part of the registration statement as of the Effective Time
               pursuant to paragraph (b) of Rule 430A of the Rules and
               Regulations; and "Prospectus" means such final prospectus, as
               first filed with the Commission pursuant to paragraph (1) or (4)
               of Rule 424(b) of the Rules and Regulations. The Commission has
               not issued any order preventing or suspending the use of any
               Preliminary Prospectus or the final Prospectus.

                      (b) The Registration Statement conforms, and the
               Prospectus and any further amendments or supplements to the
               Registration Statement or the Prospectus will, when they become
               effective or are filed with the Commission, as the case may be,
               conform in all respects to the requirements of the Securities Act
               and the Rules and Regulations and do not and will not, as of the
               applicable effective date (as to the Registration Statement and
               any amendment thereto) and as of the applicable filing date (as
               to the Prospectus and any amendment or supplement thereto)
               contain an untrue statement of a material fact or omit to state a
               material fact required to be stated therein or necessary to make
               the statements therein not misleading; provided that no
               representation or warranty is made as to information contained in
               or omitted from the Registration Statement or the Prospectus in
               reliance upon and in conformity with written information
               furnished to the Company through the Representatives by or on
               behalf of any Underwriter specifically for inclusion therein.

                      (c) The Company and each of its subsidiaries (as defined
               in Section 18) have been duly incorporated and are validly
               existing as corporations in good standing under the laws of their
               respective jurisdictions of incorporation, are duly qualified to
               do business and are in good standing as foreign corporations in
               each jurisdiction in which their respective ownership or lease of
               property or the conduct of their respective businesses requires
               such qualification (except where the failure to be so qualified
               or in good standing would not have a material adverse effect on
               the business, properties, stockholders' equity, financial
               condition, prospects or results of operations of the Company and
               its subsidiaries taken as a whole (a "Material Adverse Effect")),
               and have all power and authority necessary to own or hold their
               respective properties and to conduct the businesses in which they
               are engaged; and none of the subsidiaries of the Company is a
               "significant subsidiary", as such term is


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               defined in Rule 405 of the Rules and Regulations or otherwise
               material to the Company's business, financial condition or
               results of operations.

                      (d) The Company has an authorized capitalization as set
               forth in the Prospectus, and all of the issued shares of capital
               stock of the Company have been duly and validly authorized and
               issued, are fully paid and non-assessable and conform to the
               description thereof contained in the Prospectus; and all of the
               issued shares of capital stock of each subsidiary of the Company
               have been duly and validly authorized and issued and are fully
               paid and non-assessable and (except for directors' qualifying
               shares) are owned directly or indirectly by the Company, free and
               clear of all liens, encumbrances, equities or claims.

                      (e) The unissued shares of the Stock to be issued and sold
               by the Company to the Underwriters hereunder have been duly and
               validly authorized and, when issued and delivered against payment
               therefor as provided herein, will be duly and validly issued,
               fully paid and non-assessable; and the Stock will conform to the
               descriptions thereof contained in the Prospectus.

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

                      (g) The execution, delivery and performance of this
               Agreement by the Company and the consummation of the transactions
               contemplated hereby, and the actions contemplated in connection
               with the filing of the charter amendment described in the
               Prospectus (such actions are herein collectively called the
               "Reorganization") will not conflict with or result in a breach or
               violation of any of the terms or provisions of, or constitute a
               default under, any indenture, mortgage, deed of trust, loan
               agreement or other agreement or instrument to which the Company
               or any of its subsidiaries is a party or by which the Company or
               any of its subsidiaries is bound or to which any of the property
               or assets of the Company or any of its subsidiaries is subject,
               nor will such actions result in any violation of the provisions
               of the charter or by-laws of the Company or any of its
               subsidiaries or any statute or any order, rule or regulation of
               any court or governmental agency or body having jurisdiction over
               the Company or any of its subsidiaries or any of their properties
               or assets; and except for the registration of the Stock under the
               Securities Act and such consents, approvals, authorizations,
               registrations or qualifications as may be required under the
               Exchange Act and applicable state securities laws in connection
               with the purchase and distribution of the Stock by the
               Underwriters, no consent, approval, authorization or order of, or
               filing or registration with, any such court or governmental
               agency or body is required for the execution, delivery and
               performance of this Agreement by


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               the Company and the consummation of the transactions contemplated
               hereby.

                      (h) There are no contracts, agreements or understandings
               between the Company and any person granting such person the right
               (other than rights which have been waived or satisfied) to
               require the Company to file a registration statement under the
               Securities 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
               the Registration Statement or in any securities being registered
               pursuant to any other registration statement filed by the Company
               under the Securities Act.

                      (i) Except as described in the Prospectus, the Company has
               not sold or issued any shares of Common Stock during the
               six-month period preceding the date of the Prospectus, including
               any sales pursuant to Rule 144A under, or Regulations D or S of,
               the Securities Act, other than shares issued pursuant to employee
               benefit plans, qualified stock options plans or other employee
               compensation plans or pursuant to outstanding options, rights or
               warrants.

                      (j) Neither the Company nor any of its subsidiaries has
               sustained, since the date of the latest audited financial
               statements included in the Prospectus, any material loss or
               interference with its business from fire, explosion, flood or
               other calamity, whether or not covered by insurance, or from any
               labor dispute or court or governmental action, order or decree,
               otherwise than as set forth or contemplated in the Prospectus;
               and, since such date, there has not been any change in the
               capital stock or long-term debt of the Company or any of its
               subsidiaries or any material adverse change, or any development
               involving a prospective material adverse change, in or affecting
               the general affairs, management, financial position,
               stockholders' equity or results of operations of the Company and
               its subsidiaries, otherwise than as set forth or contemplated in
               the Prospectus.

                      (k) The financial statements (including the related notes
               and supporting schedules) filed as part of the Registration
               Statement or included in the Prospectus present fairly the
               financial condition and results of operations of the entities
               purported to be shown thereby, at the dates and for the periods
               indicated, and have been prepared in conformity with generally
               accepted accounting principles applied on a consistent basis
               throughout the periods involved.

                      (l) Deloitte & Touche LLP, who have certified certain
               financial statements of the Company, whose report appears in the
               Prospectus and who have delivered the initial letter referred to
               in Section 9(f) hereof, are


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               independent public accountants as required by the Securities Act
               and the Rules and Regulations.

                      (m) The Company and each of its subsidiaries have good and
               marketable title in fee simple to all real property and good and
               marketable title to all personal property owned by them, in each
               case free and clear of all liens, encumbrances and defects except
               such as are described in the Prospectus or such as do not
               materially affect the value of such property and do not
               materially interfere with the use made and proposed to be made of
               such property by the Company and its subsidiaries; and all real
               property and buildings held under lease by the Company and its
               subsidiaries are held by them under valid, subsisting and
               enforceable leases, with such exceptions as are not material and
               do not interfere with the use made and proposed to be made of
               such property and buildings by the Company and its subsidiaries.

                      (n) The Company and each of its subsidiaries carry, or are
               covered by, insurance in such amounts and covering such risks as
               is adequate for the conduct of their respective businesses and
               the value of their respective properties and as is customary for
               companies engaged in similar businesses in similar industries.

                      (o) Except as described in the Prospectus, the Company and
               each of its subsidiaries own or possess adequate rights to use
               all material patents, patent applications, trademarks, service
               marks, trade names, trademark registrations, service mark
               registrations, copyrights and licenses necessary for the conduct
               of their respective businesses and have no reason to believe that
               the conduct of their respective businesses will conflict with,
               and have not received any notice of any claim of conflict with,
               any such rights of others.

                      (p) There are no legal or governmental proceedings pending
               to which the Company or any of its subsidiaries is a party or of
               which any property or assets of the Company or any of its
               subsidiaries is the subject which, if determined adversely to the
               Company or any of its subsidiaries, is reasonably likely to have
               a Material Adverse Effect; and to the best of the Company's
               knowledge, no such proceedings are threatened or contemplated by
               governmental authorities or threatened by others.

                      (r) There are no contracts or other documents which are
               required to be described in the Prospectus or filed as exhibits
               to the Registration Statement by the Securities Act or by the
               Rules and Regulations which have not been described in the
               Prospectus or filed as exhibits to the Registration Statement or
               incorporated therein by reference as permitted by the Rules and
               Regulations.


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                      (s) No relationship, direct or indirect, exists between or
               among the Company on the one hand, and the directors, officers,
               stockholders, customers or suppliers of the Company on the other
               hand, which is required to be described in the Prospectus which
               is not so described.

                      (t) No labor disturbance by the employees of the Company
               exists or, to the knowledge of the Company, is imminent which is
               reasonably likely to have a Material Adverse Effect.

                      (u) The Company is in compliance in all material respects
               with all presently applicable provisions of the Employee
               Retirement Income Security Act of 1974, as amended, including the
               regulations and published interpretations thereunder ("ERISA");
               no "reportable event" (as defined in ERISA) has occurred with
               respect to any "pension plan" (as defined in ERISA) for which the
               Company would have any liability; the Company has not incurred
               and does not expect to incur liability under (i) Title IV of
               ERISA with respect to termination of, or withdrawal from, any
               "pension plan" or (ii) Sections 412 or 4971 of the Internal
               Revenue Code of 1986, as amended, including the regulations and
               published interpretations thereunder (the "Code"); and each
               "pension plan" for which the Company would have any liability
               that is intended to be qualified under Section 401(a) of the Code
               is so qualified in all material respects and nothing has
               occurred, whether by action or by failure to act, which would
               cause the loss of such qualification.

                      (v) The Company has filed all federal, state and local
               income and franchise tax returns required to be filed through the
               date hereof and has paid all taxes due thereon, and no tax
               deficiency has been determined adversely to the Company or any of
               its subsidiaries which has had (nor does the Company have any
               knowledge of any tax deficiency which, if determined adversely to
               the Company or any of its subsidiaries, is reasonably likely to
               have a Material Adverse Effect.

                      (w) Since the date as of which information is given in the
               Prospectus through the date hereof, and except as may otherwise
               be disclosed in the Prospectus, the Company has not (i) issued or
               granted any securities, (ii) incurred any liability or
               obligation, direct or contingent, other than liabilities and
               obligations which were incurred in the ordinary course of
               business, (iii) entered into any transaction not in the ordinary
               course of business or (iv) declared or paid any dividend on its
               capital stock.

                      (x) The Company (i) makes and keeps accurate books and
               records and (ii) maintains internal accounting controls which
               provide reasonable assurance that (A) transactions are executed
               in accordance with management's authorization, (B) transactions
               are recorded as necessary to


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               permit preparation of its financial statements and to maintain
               accountability for its assets, (C) access to its assets is
               permitted only in accordance with management's authorization and
               (D) the reported accountability for its assets is compared with
               existing assets at reasonable intervals.

                      (y) Neither the Company nor any of its subsidiaries (i) is
               in violation of its charter or by-laws, (ii) is in default in any
               material respect, and no event has occurred which, with notice or
               lapse of time or both, would constitute such a default, in the
               due performance or observance of any term, covenant or condition
               contained in any material indenture, mortgage, deed of trust,
               loan agreement or other agreement or instrument to which it is a
               party or by which it is bound or to which any of its properties
               or assets is subject or (iii) is in violation in any material
               respect of any law, ordinance, governmental rule, regulation or
               court decree to which it or its property or assets may be subject
               or has failed to obtain any material license, permit,
               certificate, franchise or other governmental authorization or
               permit necessary to the ownership of its property or to the
               conduct of its business.

                      (z) Neither the Company nor any of its subsidiaries, nor
               any director, officer, agent, employee or other person associated
               with or acting on behalf of the Company or any of its
               subsidiaries, has used any corporate funds for any unlawful
               contribution, gift, entertainment or other unlawful expense
               relating to political activity; made any direct or indirect
               unlawful payment to any foreign or domestic government official
               or employee from corporate funds; violated or is in violation of
               any provision of the Foreign Corrupt Practices Act of 1977; or
               made any bribe, rebate, payoff, influence payment, kickback or
               other unlawful payment.

                      (aa) There has been no storage, disposal, generation,
               manufacture, refinement, transportation, handling or treatment of
               toxic wastes, medical wastes, hazardous wastes or hazardous
               substances by the Company or any of its subsidiaries (or, to the
               knowledge of the Company, any of their predecessors in interest)
               at, upon or from any of the property now or previously owned or
               leased by the Company or its subsidiaries in violation of any
               applicable law, ordinance, rule, regulation, order, judgment,
               decree or permit or which would require remedial action under any
               applicable law, ordinance, rule, regulation, order, judgment,
               decree or permit, except for any violation or remedial action
               which would not have, or could not be reasonably likely to have,
               singularly or in the aggregate with all such violations and
               remedial actions, a material adverse effect on the general
               affairs, management, financial position, stockholders' equity or
               results of operations of the Company and its subsidiaries; there
               has been no material spill, discharge, leak, emission, injection,
               escape, dumping or release of any kind onto such property or into
               the environment surrounding such


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               property of any toxic wastes, medical wastes, solid wastes,
               hazardous wastes or hazardous substances due to or caused by the
               Company or any of its subsidiaries or with respect to which the
               Company or any of its subsidiaries have knowledge, except for any
               such spill, discharge, leak, emission, injection, escape, dumping
               or release which would not have or would not be reasonably likely
               to have, singularly or in the aggregate with all such spills,
               discharges, leaks, emissions, injections, escapes, dumpings and
               releases, a Material Adverse Effect; and the terms "hazardous
               wastes", "toxic wastes", "hazardous substances" and "medical
               wastes" shall have the meanings specified in any applicable
               local, state, federal and foreign laws or regulations with
               respect to environmental protection.

                      (ab) Neither the Company nor any subsidiary is an
               "investment company" within the meaning of such term under the
               Investment Company Act of 1940 and the rules and regulations of
               the Commission thereunder.

               2. [This Section Intentionally Left Blank.]

               3. Purchase of the Stock by the Underwriters. On the basis of the
representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Company agrees to sell 5,000,000 shares of
the Firm Stock to the several Underwriters and each of the Underwriters,
severally and not jointly, agrees to purchase the number of shares of the Firm
Stock set opposite that Underwriter's name in Schedule 1 hereto. The respective
purchase obligations of the Underwriters with respect to the Firm Stock shall be
rounded among the Underwriters to avoid fractional shares, as the
Representatives may determine.

               In addition, the Company grants to the Underwriters an option to
purchase up to 750,000 shares of Option Stock. Such option is granted solely for
the purpose of covering over-allotments in the sale of Firm Stock and is
exercisable as provided in Section 5 hereof. Shares of Option Stock shall be
purchased severally for the account of the Underwriters in proportion to the
number of shares of Firm Stock set opposite the name of such Underwriters in
Schedule 1 hereto. The respective purchase obligations of each Underwriter with
respect to the Option Stock shall be adjusted by the Representatives so that no
Underwriter shall be obligated to purchase Option Stock other than in 100 share
amounts. The price of both the Firm Stock and any Option Stock shall be $_____
per share.

               The Company shall not be obligated to deliver any of the Stock to
be delivered on the First Delivery Date or the Second any Delivery Date (as
hereinafter defined), as the case may be, except upon payment for all the Stock
to be purchased on such Delivery Date as provided herein.

               4. Offering of Stock by the Underwriters; Directed Shares


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               Upon authorization by the Representatives of the release of the
Firm Stock, the several Underwriters propose to offer the Firm Stock for sale
upon the terms and conditions set forth in the Prospectus.

               It is understood that approximately 400,000 shares of the Firm
Stock ("Directed Shares") will initially be reserved by the Underwriters for
offer and sale to the Company's officers, directors, employees and their family
members and to its business associates ("Directed Share Participants") upon the
terms and conditions set forth in the Prospectus and in accordance with the
rules and regulations of the National Association of Securities Dealers, Inc.
Under no circumstances will the Representatives or any Underwriter be liable to
the Company or to any Directed Share Participant for any action taken or omitted
to be taken in good faith in connection with such Directed Share Program. To the
extent that any Directed Shares are not affirmatively reconfirmed for purchase
by any Directed Share Participant on or immediately after the date of this
Agreement, such Directed Shares may be offered to the public as part of the
public offering contemplated hereby.

               The Company agrees to pay all reasonable out-of-pocket fees and
disbursements incurred by the Underwriters in connection with the Directed Share
Program, including counsel fees and any stamp duties or other taxes incurred by
the Underwriters in connection with the Directed Share Program upon submission
to the Company of written documentation with respect to such fees and
disbursements.

               In connection with the offer and sale of the Directed Shares, the
Company agrees, promptly upon a request in writing, to indemnify and hold
harmless the Representatives and the other Underwriters from and against any
loss, claim, damage, expense, liability or action which (i) arises out of, or is
based upon, any untrue statement or alleged untrue statement of a material fact
contained in any material prepared by or with the approval of the Company for
distribution to Directed Share Participants, other than any Preliminary
Prospectus or Final Prospectus (other than as set forth in Section 11 hereof) in
connection with the Directed Share Program or 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) arises out of the failure of
any Directed Share Program participant to pay for and accept delivery of
Directed Shares that the Participant agreed to purchase or (iii) is otherwise
related to the Directed Share Program, other than losses, claims, damages or
liabilities (or expenses relating thereto) that are finally judicially
determined to have resulted directly from the bad faith or gross negligence of
the Representatives.

               5. Delivery of and Payment for the Stock. Delivery of and payment
for the Firm Stock shall be made at the office of ____________________, at 7:00
A.M., California time, on the third full business day following the date of this
Agreement or at such other date or place as shall be determined by agreement
between the Representatives and the Company. This date and time are sometimes
referred to as the First Delivery Date." On the First Delivery Date, the Company
shall deliver or cause to be delivered certificates representing the Firm Stock
to the Representatives for the account of each


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Underwriter against payment to or upon the order of the Company of the purchase
price by wire transfer in certified or official bank check or checks payable in
New York Clearing House (next-day) funds. Time shall be of the essence, and
delivery at the time and place specified pursuant to this Agreement is a further
condition of the obligation of each Underwriter hereunder. Upon delivery, the
Firm Stock shall be registered in such names and in such denominations as the
Representatives shall request in writing not less than two full business days
prior to the First Delivery Date. For the purpose of expediting the checking and
packaging of the certificates for the Stock, the Company shall make the
certificates representing the Firm Stock available for inspection by the
Representatives in New York, New York, not later than 2:00 P.M., New York City
time, on the business day prior to the First Delivery Date.

               The option granted in Section 3 will expire 30 days after the
date of this Agreement and may be exercised in whole or in part from time to
time by written notice being given to the Company by the Representatives. Such
notice shall set forth the aggregate number of shares of Option Stock as to
which the option is being exercised, the names in which the shares of Option
Stock are to be registered, the denominations in which the shares of Option
Stock are to be issued and the date and time, as determined by the
Representatives, when the shares of Option Stock are to be delivered; provided,
however, that this date and time shall not be earlier than the First Delivery
Date nor earlier than the second business day after the date on which the option
shall have been exercised nor later than the fifth business day after the date
on which the option shall have been exercised. The date and time the shares of
Option Stock are delivered are sometimes referred to as the a "Second Delivery
Date" and the First Delivery Date and the any Second Delivery Date are sometimes
each referred to as a "Delivery Date").

               Delivery of and payment for the Option Stock shall be made at the
place specified in the first sentence of the first paragraph of this Section 5
(or at such other place as shall be determined by agreement between the
Representatives and the Company) at 7:00 A.M., California time, on the such
Second Delivery Date. On the such Second Delivery Date, the Company shall
deliver or cause to be delivered the certificates representing the Option Stock
to the Representatives for the account of each Underwriter against payment to or
upon the order of the Company of the purchase price by wire transfer in
certified or official bank check or checks payable in New York Clearing House
(next-day) funds. Time shall be of the essence, and delivery at the time and
place specified pursuant to this Agreement is a further condition of the
obligation of each Underwriter hereunder. Upon delivery, the Option Stock shall
be registered in such names and in such denominations as the Representatives
shall request in the aforesaid written notice. For the purpose of expediting the
checking and packaging of the certificates for the Option Stock, the Company
shall make the certificates representing the Option Stock available for
inspection by the Representatives in New York, New York, not later than 2:00
P.M., New York City time, on the business day prior to the such Second Delivery
Date.

               6. Further Agreements of the Company. The Company agrees:


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<PAGE>   11
                      (a) To prepare the Prospectus in a form approved by the
               Representatives and to file such Prospectus pursuant to Rule
               424(b) under the Securities Act not later than Commission's close
               of business on the second business day following the execution
               and delivery of this Agreement or, if applicable, such earlier
               time as may be required by Rule 430A(a)(3) under the Securities
               Act; to make no further amendment or any supplement to the
               Registration Statement or to the Prospectus except as permitted
               herein; to advise the Representatives, promptly after it receives
               notice thereof, of the time when any amendment to the
               Registration Statement has been filed or becomes effective or any
               supplement to the Prospectus or any amended Prospectus has been
               filed and to furnish the Representatives with copies thereof; to
               advise the Representatives promptly after it receives notice
               thereof, of the issuance by the Commission of any stop order or
               of any order preventing or suspending the use of any Preliminary
               Prospectus or the Prospectus, of the suspension of the
               qualification of the Stock for offering or sale in any
               jurisdiction, of the initiation or threatening of any proceeding
               for any such purpose, or of any request by the Commission for the
               amending or supplementing of the Registration Statement or the
               Prospectus or for additional information; and, in the event of
               the issuance of any stop order or of any order preventing or
               suspending the use of any Preliminary Prospectus or the
               Prospectus or suspending any such qualification, to use promptly
               its best efforts to obtain its withdrawal;

                      (b) To furnish promptly to the Representatives and to
               counsel for the Underwriters a signed copy of the Registration
               Statement as originally filed with the Commission, and each
               amendment thereto filed with the Commission, including all
               consents and exhibits filed therewith;

                      (c) To deliver promptly to the Representatives such number
               of the following documents as the Representatives shall
               reasonably request: (i) conformed copies of the Registration
               Statement as originally filed with the Commission and each
               amendment thereto (in each case excluding exhibits other than
               this Agreement), and (ii) each Preliminary Prospectus, the
               Prospectus and any amended or supplemented Prospectus; and, if
               the delivery of a prospectus is required at any time after the
               Effective Time in connection with the offering or sale of the
               Stock or any other securities relating thereto and if at such
               time any events shall have occurred 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 in order to make the statements therein, in the
               light of the circumstances under which they were made when such
               Prospectus is delivered, not misleading, or, if for any other
               reason it shall be necessary to amend or supplement the
               Prospectus in order to comply with the Securities Act, to notify
               the Representatives and, upon its request, to file such document
               and to prepare and furnish without charge to each


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<PAGE>   12
               Underwriter and to any dealer in securities as many copies as the
               Representatives may from time to time reasonably request of an
               amended or supplemented Prospectus which will correct such
               statement or omission or effect such compliance;

                      (d) To file promptly with the Commission any amendment to
               the Registration Statement or the Prospectus or any supplement to
               the Prospectus that may, in the judgment of the Company or the
               Representatives, be required by the Securities Act or requested
               by the Commission;

                      (e) Prior to filing with the Commission any amendment to
               the Registration Statement or supplement to the Prospectus or any
               Prospectus pursuant to Rule 424 of the Rules and Regulations, to
               furnish a copy thereof to the Representatives and counsel for the
               Underwriters and obtain the consent of the Representatives to the
               filing;

                      (f) As soon as practicable after the Effective Date (it
               being understood that the Company shall have until at least 410
               days after the end of the Company's current fiscal quarter), to
               make generally available to the Company's security holders and to
               deliver to the Representatives an earnings statement of the
               Company and its subsidiaries (which need not be audited)
               complying with Section 11(a) of the Securities Act and the Rules
               and Regulations (including, at the option of the Company, Rule
               158);

                      (g) For a period of five years following the Effective
               Date, to furnish to the Representatives copies of all materials
               furnished by the Company to its stockholders and all public
               reports and all reports and financial statements furnished by the
               Company to the principal national securities exchange upon which
               the Common Stock may be listed pursuant to requirements of or
               agreements with such exchange or to the Commission pursuant to
               the Exchange Act or any rule or regulation of the Commission
               thereunder;

                      (h) Promptly from time to time to take such action as the
               Representatives may reasonably request to qualify the Stock for
               offering and sale under the securities laws of such jurisdictions
               as the Representatives may request and to comply with such laws
               so as to permit the continuance of sales and dealings therein in
               such jurisdictions for as long as may be necessary to complete
               the distribution of the Stock; provided that in connection
               therewith the Company shall not be required to qualify as a
               foreign corporation or to file a general consent to service of
               process in any jurisdiction;

                      (i) For a period of 180 days from the date of the
               Prospectus, not to, directly or indirectly, (1) offer for sale,
               sell, pledge or otherwise dispose of


                                       12


<PAGE>   13
               (or enter into any transaction or device which is designed to, or
               could be expected to, result in the disposition by any person at
               any time in the future of) any shares of Common Stock or
               securities convertible into or exchangeable for Common Stock
               (other than the Stock and shares issued pursuant to employee
               benefit plans, qualified stock option plans or other employee
               compensation plans existing on the date hereof or pursuant to
               currently outstanding options, warrants or rights), or sell or
               grant options, rights or warrants with respect to any shares of
               Common Stock or securities convertible into or exchangeable for
               Common Stock (other than the grant of options pursuant to option
               plans existing on the date hereof), (2) enter into any swap or
               other derivatives transaction that transfers to another, in whole
               or in part, any of the economic benefits or risks of ownership of
               such shares of Common Stock, whether any such transaction
               described in clause (1) or (2) above is to be settled by delivery
               of Common Stock or other securities, in cash or otherwise, or (3)
               release any of the Company's stockholders from any restriction or
               agreement between the Company and such stockholder that restricts
               such stockholder from taking any of the actions contained in
               clause (1) or (2) above and shall use reasonable efforts to
               enforce its rights with respect to such restrictions, in each
               case without the prior written consent of Lehman Brothers Inc.;

                      (j) Prior to the Effective Date, to apply for the listing
               of the Stock on the National Market System and to use its best
               efforts to complete that listing, subject only to official notice
               of issuance and evidence of satisfactory distribution, prior to
               the First Delivery Date; and

                      (k) To apply the net proceeds from the sale of the Stock
               being sold by the Company as set forth in the Prospectus.

               7. [This Section Intentionally Left Blank]

               8. Expenses. The Company agrees to pay (a) the costs incident to
the authorization, issuance, sale and delivery of the Stock and any taxes
payable in that connection; (b) the costs incident to the preparation, printing
and filing under the Securities Act of the Registration Statement and any
amendments and exhibits thereto; (c) the costs of distributing the Registration
Statement as originally filed and each amendment thereto and any post-effective
amendments thereof (including, in each case, exhibits), any Preliminary
Prospectus, the Prospectus and any amendment or supplement to the Prospectus,
all as provided in this Agreement; (d) the costs of producing and distributing
this Agreement and any other related documents in connection with the offering,
purchase, sale and delivery of the stock; (e) the filing fees incident to
securing any required review by the National Association of Securities Dealers,
Inc. of the terms of sale of the Stock; (f) any applicable listing or other
fees; (g) the fees and expenses of qualifying the Stock under the securities
laws of the several jurisdictions as provided in Section 6(h) and of preparing,
printing and distributing a Blue Sky Memorandum; (h) all reasonable
out-of-pocket costs and expenses of the Underwriters, including the fees and
disbursements of counsel for the Underwriters, incident to the offer and sale of
shares of the Stock by the Underwriters to officers, directors, employees and
their families and the business associates of the Company, as described in
Section 4; and (i) all other costs and expenses incident to the performance of
the obligations of the Company under this


                                       13


<PAGE>   14
Agreement; provided that, except as provided in this Section 8 and in Section
14, the Underwriters shall pay their own costs and expenses, including the costs
and expenses of their counsel, any transfer taxes on the Stock which they may
sell, and any transfer taxes payable in connection with their respective sales
of Stock to the Underwriters and reimburse the Company for their pro rata share
of the fees and expenses paid by the Company in connection with the offering of
the Stock.

               9. Conditions of Underwriters' Obligations. The respective
obligations of the Underwriters hereunder are subject to the accuracy, when made
and on each Delivery Date, of the representations and warranties of the Company
contained herein, to the performance by the Company of its obligations
hereunder, and to each of the following additional terms and conditions:

                      (a) The Prospectus shall have been timely filed with the
               Commission in accordance with Section 6(a); no stop order
               suspending the effectiveness of the Registration Statement or any
               part thereof shall have been issued and no proceeding for that
               purpose shall have been initiated or threatened by the
               Commission; and any request of the Commission for inclusion of
               additional information in the Registration Statement or the
               Prospectus or otherwise shall have been complied with.

                      (b) No Underwriter shall have discovered and disclosed to
               the Company on or prior to such Delivery Date that the
               Registration Statement or the Prospectus or any amendment or
               supplement thereto contains an untrue statement of a fact which,
               in the opinion of Gibson, Dunn & Crutcher LLP, counsel for the
               Underwriters, is material or omits to state a fact which, in the
               opinion of such counsel, is material and is required to be stated
               therein or is necessary to make the statements therein not
               misleading.

                      (c) All corporate proceedings and other legal matters
               incident to the authorization, form and validity of this
               Agreement, the Stock, the Registration Statement and the
               Prospectus, and all other legal matters relating to this
               Agreement and the transactions contemplated hereby shall be
               reasonably satisfactory in all material respects to counsel for
               the Underwriters, and the Company shall have furnished to such
               counsel all documents and information that they may reasonably
               request to enable them to pass upon such matters.

                      (d) (1) Pillsbury Madison & Sutro LLP shall have furnished
               to the Representatives its written opinion, as counsel to the
               Company, addressed to the Underwriters and dated such Delivery
               Date, in form and substance reasonably satisfactory to the
               Representatives, to the effect that:

                           (i) The Company has been duly incorporated and is
                      validly existing as a corporation in good standing under
                      the laws of


                                       14


<PAGE>   15
                      Delaware and is duly qualified to do business and is in
                      good standing as a foreign corporation in California;

                           (ii) The Company has an authorized capitalization as
                      set forth in the Prospectus, and all of the issued shares
                      of capital stock of the Company (including the shares of
                      Stock being delivered on such Delivery Date) have been
                      duly and validly authorized and issued, are fully paid and
                      non-assessable and conform to the description thereof
                      contained in the Prospectus;

                           (iii) There are no preemptive or other rights to
                      subscribe for or to purchase, nor any restriction upon the
                      voting or transfer of, any shares of the Stock pursuant to
                      the Company's charter or by-laws or any agreement or other
                      instrument known to such counsel;

                           (iv) [This Section Intentionally Left Blank];

                           (v) To such counsel's knowledge and other than as set
                      forth in the Prospectus, there are no legal or
                      governmental proceedings pending to which the Company is a
                      party or of which any property or assets of the Company is
                      the subject which, if determined adversely to the Company,
                      would reasonably be expected to have a Material Adverse
                      Effect; and, to such counsel's knowledge, no such
                      proceedings are threatened or contemplated by governmental
                      authorities or threatened by others;

                           (vi) The Registration Statement was declared
                      effective under the Securities Act as of the date and time
                      specified in such opinion, the Prospectus was filed with
                      the Commission pursuant to the subparagraph of Rule 424(b)
                      of the Rules and Regulations specified in such opinion on
                      the date specified therein and no stop order suspending
                      the effectiveness of the Registration Statement has been
                      issued and, to the knowledge of such counsel, no
                      proceeding for that purpose is pending or threatened by
                      the Commission;

                           (vii) The Registration Statement and the Prospectus
                      and any further amendments or supplements thereto made by
                      the Company prior to such Delivery Date (other than the
                      financial statements, financial data and related schedules
                      therein, as to which such counsel need express no opinion)
                      comply as to form in all material respects with the
                      requirements of the Securities Act and the Rules and
                      Regulations;

                           (viii) [This Section Intentionally Left Blank]


                                       15


<PAGE>   16
                           (ix) To such counsel's knowledge, there are no
                      contracts or other documents which are required to be
                      described in the Prospectus or filed as exhibits to the
                      Registration Statement by the Securities Act or by the
                      Rules and Regulations which have not been described or
                      filed as exhibits to the Registration Statement;

                           (x) This Agreement has been duly authorized, executed
                      and delivered by the Company;

                           (xi) The issue and sale of the shares of Stock being
                      delivered on such Delivery Date by the Company and the
                      compliance by the Company with all of the provisions of
                      this Agreement and the consummation of the transactions
                      contemplated hereby will not conflict with or result in a
                      breach or violation of any of the terms or provisions of,
                      or constitute a default under, any indenture, mortgage,
                      deed of trust, loan agreement or other agreement or
                      instrument to which the Company is a party or by which the
                      Company or any of its subsidiaries is bound or to which
                      any of the property or assets of the Company is subject,
                      and which has been filed as an exhibit to the Registration
                      Statement or identified by the Representatives
                      ("Contracts") nor will such actions result in any
                      violation of the provisions of the charter or by-laws of
                      the Company or any statute or any order, rule or
                      regulation known to such counsel of any court or
                      governmental agency or body having jurisdiction over the
                      Company or any of its properties or assets; and, except
                      for the registration of the Stock under the Securities Act
                      and such consents, approvals, authorizations,
                      registrations or qualifications as may be required under
                      the Exchange Act and applicable state securities laws in
                      connection with the purchase and distribution of the Stock
                      by the Underwriters, no material consent, approval,
                      authorization or order of, or filing or registration with,
                      any such court or governmental agency or body is required
                      for the execution, delivery and performance of this
                      Agreement by the Company and the consummation of the
                      transactions contemplated hereby; and

                           (xii) To such counsel's knowledge, there are no
                      contracts, agreements or understandings between the
                      Company and any person granting such person the right
                      (other than rights which have been waived or satisfied) to
                      require the Company to file a registration statement under
                      the Securities 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 the Registration Statement or in
                      any


                                       16


<PAGE>   17
                      securities being registered pursuant to any other
                      registration statement filed by the Company under the
                      Securities Act.

               In rendering such opinion, such counsel may (i) state that its
               opinion is limited to matters governed by the Federal laws of the
               United States of America, the laws of the State of California and
               the General Corporation Law of the State of Delaware, and that
               such counsel is not admitted in the State of Delaware; and (ii)
               in respect of matters of fact, that it is relying solely upon
               certificates of officers of the Company or its subsidiaries,
               provided that such counsel shall state that it believes that both
               the Underwriters and it are justified in relying upon such
               certificates. Such counsel shall also have furnished to the
               Representatives a written statement, addressed to the
               Underwriters and dated such Delivery Date, in form and substance
               satisfactory to the Representatives, to the effect that (x) such
               counsel has acted as counsel to the Company in connection with
               the preparation of the Registration Statement, and (y) based on
               the foregoing, no facts have come to the attention of such
               counsel which lead it to believe that the Registration Statement
               (other than the financial statements, financial data and related
               schedules therein, as to which such counsel need express no
               opinion), as of the Effective Date, contained any untrue
               statement of a material fact or omitted to state a material fact
               required to be stated therein or necessary in order to make the
               statements therein not misleading, that the Prospectus (other
               than the financial statements, financial data and related
               schedules therein, as to which such counsel need express no
               opinion) contains any untrue statement of a material fact or
               omits to state a material fact required to be stated therein or
               necessary in order to make the statements therein, in light of
               the circumstances under which they were made, not misleading, or
               the Registration Statement or the Prospectus (other than the
               financial statements, financial data and related schedules
               therein, as to which such counsel need express no opinion)
               contains any untrue statement of a material fact or omits to
               state a material fact required to be stated therein or necessary
               in order to make the statements therein, in light of the
               circumstances under which they were made, not misleading as of
               the Delivery Date. The foregoing opinion and statement may be
               qualified by a statement to the effect that such counsel does not
               assume any responsibility for the accuracy, completeness or
               fairness of the statements contained in the Registration
               Statement or the Prospectus except for the statements made in the
               Prospectus under the caption "Description of Capital Stock,"
               insofar as such statements relate to the Stock and concern legal
               matters.

                           (2) ___________ shall have furnished to the
               Representatives its written opinion, as special intellectual
               property counsel to the Company, addressed to the Underwriters
               and dated such Delivery Date, in form and substance reasonably
               satisfactory to the Representatives.


                                       17


<PAGE>   18
                      (e) The Representatives shall have received from Gibson,
               Dunn & Crutcher LLP, counsel for the Underwriters, such opinion
               or opinions, dated such Delivery Date, with respect to the
               issuance and sale of the Stock, the Registration Statement, the
               Prospectus and other related matters as the Representatives may
               reasonably require, and the Company shall have furnished to such
               counsel such documents as they reasonably request for the purpose
               of enabling them to pass upon such matters.

                      (f) At the time of execution of this Agreement, the
               Representatives shall have received from Deloitte & Touche LLP a
               letter, in form and substance satisfactory to the
               Representatives, addressed to the Underwriters and dated the date
               hereof (i) confirming that they are independent public
               accountants within the meaning of the Securities Act and are in
               compliance with the applicable requirements relating to the
               qualification of accountants under Rule 2-01 of Regulation S-X of
               the Commission, and (ii) stating, as of the date hereof (or, with
               respect to matters involving changes or developments since the
               respective dates as of which specified financial information is
               given in the Prospectus, as of a date not more than five days
               prior to the date hereof), the conclusions and findings of such
               firm with respect to the financial information and other matters
               ordinarily covered by accountants' "comfort letters" to
               underwriters in connection with registered public offerings.

                      (g) With respect to the letter of Deloitte & Touche LLP
               referred to in the preceding paragraph and delivered to the
               Representatives concurrently with the execution of this Agreement
               (the "initial letter"), the Company shall have furnished to the
               Representatives a letter (the "bring-down letter") of such
               accountants, addressed to the Underwriters and dated such
               Delivery Date (i) confirming that they are independent public
               accountants within the meaning of the Securities Act and are in
               compliance with the applicable requirements relating to the
               qualification of accountants under Rule 2-01 of Regulation S-X of
               the Commission, (ii) stating, as of the date of the bring-down
               letter (or, with respect to matters involving changes or
               developments since the respective dates as of which specified
               financial information is given in the Prospectus, as of a date
               not more than five days prior to the date of the bring-down
               letter), the conclusions and findings of such firm with respect
               to the financial information and other matters covered by the
               initial letter and (iii) confirming in all material respects the
               conclusions and findings set forth in the initial letter.

                      (h) The Company shall have furnished to the
               Representatives a certificate, dated such Delivery Date, of its
               Chairman of the Board, its President or a Vice President and its
               chief financial officer stating that:


                                       18


<PAGE>   19
                           (i) The representations, warranties and agreements of
                      the Company in Section 1 are true and correct as of such
                      Delivery Date; the Company has complied with all its
                      agreements contained herein required to have been complied
                      with on or prior to the date hereof; and the conditions
                      set forth in Sections 9(a) and 9(i) have been fulfilled;
                      and

                           (ii) They have carefully examined the Registration
                      Statement and the Prospectus and, in their opinion (A) as
                      of the Effective Date, the Registration Statement and
                      Prospectus did not include any untrue statement of a
                      material fact and did not omit to state a material fact
                      required to be stated therein or necessary to make the
                      statements therein not misleading, and (B) since the
                      Effective Date no event has occurred which should have
                      been set forth in a supplement or amendment to the
                      Registration Statement or the Prospectus.

                      (i) (i) Neither the Company nor any of its subsidiaries
               shall have sustained since the date of the latest audited
               financial statements included in the Prospectus any loss or
               interference with its business from fire, explosion, flood or
               other calamity, whether or not covered by insurance, or from any
               labor dispute or court or governmental action, order or decree,
               otherwise than as set forth or contemplated in the Prospectus or
               (ii) since such date there shall not have been any change in the
               capital stock or long-term debt of the Company or any of its
               subsidiaries or any change, or any development involving a
               prospective change, in or affecting the general affairs,
               management, financial position, stockholders' equity or results
               of operations of the Company and its subsidiaries, otherwise than
               as set forth or contemplated in the Prospectus, the effect of
               which, in any such case described in clause (i) or (ii), is, in
               the judgment of the Representatives, so material and adverse as
               to make it impracticable or inadvisable to proceed with the
               public offering or the delivery of the Stock being delivered on
               such Delivery Date on the terms and in the manner contemplated in
               the Prospectus.

                      (j) Subsequent to the execution and delivery of this
               Agreement there shall not have occurred any of the following: (i)
               trading in securities generally on the New York Stock Exchange or
               the American Stock Exchange or in the over-the-counter market, or
               trading in any securities of the Company on any exchange or in
               the over-the-counter market, shall have been suspended or minimum
               prices shall have been established on any such exchange or such
               market by the Commission, by such exchange or by any other
               regulatory body or governmental authority having jurisdiction,
               (ii) a banking moratorium shall have been declared by Federal or
               state authorities, (iii) the United States shall have become
               engaged in hostilities, there shall have been an escalation in
               hostilities involving the


                                       19


<PAGE>   20
               United States or there shall have been a declaration of a
               national emergency or war by the United States or (iv) there
               shall have occurred such a material adverse change in general
               economic, political or financial conditions (or the effect of
               international conditions on the financial markets in the United
               States shall be such) as to make it, in the judgment of a
               majority in interest of the several Underwriters, impracticable
               or inadvisable to proceed with the public offering or delivery
               of the Stock being delivered on such Delivery Date on the terms
               and in the manner contemplated in the Prospectus.

                      (k) The National Market System shall have approved the
               Stock for listing, subject only to official notice of issuance
               and evidence of satisfactory distribution.

               All opinions, letters, evidence and certificates mentioned above
or elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the Underwriters.

               10. [This Section Intentionally Left Blank]

               11. Indemnification and Contribution.

               (a) The Company shall indemnify and hold harmless each
Underwriter, its officers and employees and each person, if any, who controls
any Underwriter within the meaning of the Securities Act, from and against any
loss, claim, damage or liability, joint or several, or any action in respect
thereof (including, but not limited to, any loss, claim, damage, liability or
action relating to purchases and sales of Stock), to which that Underwriter,
officer, employee or controlling person may become subject, under the Securities
Act or otherwise, insofar as such loss, claim, damage, liability or action
arises out of, or is based upon, (i) any untrue statement or alleged untrue
statement of a material fact contained (A) in any Preliminary Prospectus, the
Registration Statement or the Prospectus or in any amendment or supplement
thereto, (B) in any blue sky application or other document prepared or executed
by the Company (or based upon any written information furnished by the Company)
specifically for the purpose of qualifying any or all of the Stock under the
securities laws of any state or other jurisdiction (any such application,
document or information being hereinafter called a "Blue Sky Application"), or
(C) in any materials or information provided to investors by, or with the
approval of, the Company in connection with the marketing of the offering of the
Stock ("Marketing Materials"), including any roadshow or investor presentations
made to investors by the Company (whether in person or electronically), (ii) the
omission or alleged omission to state in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or in any amendment or supplement
thereto, or in any Blue Sky Application or Marketing Materials, any material
fact required to be stated therein or necessary to make the statements therein
not misleading, or (iii) any act or failure to act or any alleged act or failure
to act by any Underwriter in connection with, or relating in


                                       20


<PAGE>   21
any manner to, the Stock or the offering contemplated hereby, and which is
included as part of or referred to in any loss, claim, damage, liability or
action arising out of or based upon matters covered by clause (i) or (ii) above
(provided that the Company shall not be liable under this clause (iii) to the
extent that it is determined in a final judgment by a court of competent
jurisdiction that such loss, claim, damage, liability or action resulted
directly from any such acts or failures to act undertaken or omitted to be taken
by such Underwriter through its gross negligence or willful misconduct), and
shall reimburse each Underwriter and each such officer, employee or controlling
person promptly upon demand for any legal or other expenses reasonably incurred
by that Underwriter, officer, employee or controlling person in connection with
investigating or defending or preparing to defend against any such loss, claim,
damage, liability or action as such expenses are incurred; provided, however,
that the Company shall not be liable in any such case to the extent that any
such loss, claim, damage, liability or action arises out of, or is based upon,
any untrue statement or alleged untrue statement or omission or alleged omission
made in any Preliminary Prospectus, the Registration Statement or the
Prospectus, or in any such amendment or supplement, or in any Blue Sky
Application, in reliance upon and in conformity with written information
concerning such Underwriter furnished to the Company through the Representatives
by or on behalf of any Underwriter specifically for inclusion therein which
information consists solely of the information specified in Section 11(f). The
indemnification agreement set forth in this paragraph 11(a) with respect to any
Preliminary Prospectus shall not inure to the benefit of any Underwriters from
whom the person asserting any such losses, claims, damages, liabilities or
expenses purchased the Stock which is the subject thereof (or to the benefit of
any person controlling such Underwriter) if at or prior to the written
confirmation of the sale of such Stock a copy of the Prospectus (or the
Prospectus as amended or supplemented) was not sent or delivered to such person
and the untrue statement or omission of a material fact contained in such
Preliminary Prospectus was corrected in the Prospectus (or in the Prospectus as
amended or supplemented) in any case where such delivery is required by the
Securities Act, unless the failure is the result of noncompliance by the Company
with paragraph 6(a) hereof. The foregoing indemnity agreement is in addition to
any liability which the Company may otherwise have to any Underwriter or to any
officer, employee or controlling person of that Underwriter.

               (b) [This Section Intentionally Left Blank]

               (c) Each Underwriter, severally and not jointly, shall indemnify
and hold harmless the Company, its officers and employees, each of its
directors, and each person, if any, who controls the Company within the meaning
of the Securities Act, from and against any loss, claim, damage or liability,
joint or several, or any action in respect thereof, to which the Company or any
such director, officer or controlling person may become subject, under the
Securities Act or otherwise, insofar as such loss, claim, damage, liability or
action arises out of, or is based upon, (i) any untrue statement or alleged
untrue statement of a material fact contained (A) in any Preliminary Prospectus,
the Registration Statement or the Prospectus or in any


                                       21


<PAGE>   22
amendment or supplement thereto, or (B) in any Blue Sky Application or (ii) the
omission or alleged omission to state in any Preliminary Prospectus, the
Registration Statement or the Prospectus, or in any amendment or supplement
thereto, or in any Blue Sky Application any material fact required to be stated
therein or necessary to make the statements therein not misleading, but in each
case only to the extent that the untrue statement or alleged untrue statement or
omission or alleged omission was made in reliance upon and in conformity with
written information concerning such Underwriter furnished to the Company through
the Representatives by or on behalf of that Underwriter specifically for
inclusion therein, and shall reimburse the Company and any such director,
officer or controlling person for any legal or other expenses reasonably
incurred by the Company or any such director, officer or controlling person in
connection with investigating or defending or preparing to defend against any
such loss, claim, damage, liability or action as such expenses are incurred. The
foregoing indemnity agreement is in addition to any liability which any
Underwriter may otherwise have to the Company or any such director, officer,
employee or controlling person.

               (d) Promptly after receipt by an indemnified party under this
Section 11 of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect thereof is to be made against the
indemnifying party under this Section 11, notify the indemnifying party in
writing of the claim or the commencement of that action; provided, however, that
the failure to notify the indemnifying party shall not relieve it from any
liability which it may have under this Section 11 except to the extent it has
been materially prejudiced by such failure and, provided further, that the
failure to notify the indemnifying party shall not relieve it from any liability
which it may have to an indemnified party otherwise than under this Section 11.
If any such claim or action shall be brought against an indemnified party, and
it shall notify the indemnifying party thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it wishes, jointly with
any other similarly notified indemnifying party, to assume the defense thereof
with counsel reasonably satisfactory to the indemnified party. After notice from
the indemnifying party to the indemnified party of its election to assume the
defense of such claim or action, the indemnifying party shall not be liable to
the indemnified party under this Section 11 for any legal or other expenses
subsequently incurred by the indemnified party in connection with the defense
thereof other than reasonable costs of investigation; provided, however, that
the Representatives shall have the right to employ counsel to represent jointly
the Representatives and those other Underwriters and their respective officers,
employees and controlling persons who may be subject to liability arising out of
any claim in respect of which indemnity may be sought by the Underwriters
against the Company under this Section 11 if, in the reasonable judgment of the
Representatives, it is advisable for the Representatives and those Underwriters,
officers, employees and controlling persons to be jointly represented by
separate counsel, and in that event the fees and expenses of such separate
counsel shall be paid by the Company. No indemnifying party shall (i) without
the prior written consent of the indemnified parties (which consent shall not be
unreasonably withheld), settle or compromise or consent to the entry of any
judgment with respect to any pending or threatened claim, action, suit or
proceeding in respect of which indemnification or contribution may be sought
hereunder (whether or not the indemnified parties are actual or potential
parties to such claim or action) unless such settlement, compromise or consent
includes an unconditional release of each indemnified


                                       22


<PAGE>   23
party from all liability arising out of such claim, action, suit or proceeding,
or (ii) be liable for any settlement of any such action effected without its
written consent (which consent shall not be unreasonably withheld), but if
settled with the consent of the indemnifying party or if there be a final
judgment of the plaintiff in any such action, the indemnifying party agrees to
indemnify and hold harmless any indemnified party from and against any loss or
liability by reason of such settlement or judgment.

               (e) If the indemnification provided for in this Section 11 shall
for any reason be unavailable to or insufficient to hold harmless an indemnified
party under Section 11(a) or 11(c) in respect of any loss, claim, damage or
liability, or any action in respect thereof, referred to therein, then each
indemnifying party shall, in lieu of indemnifying such indemnified party,
contribute to the amount paid or payable by such indemnified party as a result
of such loss, claim, damage or liability, or action in respect thereof, (i) in
such proportion as shall be 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 Stock 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 with respect to the statements or omissions which resulted in such loss,
claim, damage or liability, or action in respect thereof, 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 with respect to such offering
shall be deemed to be in the same proportion as the total net proceeds from the
offering of the Stock purchased under this Agreement (before deducting expenses)
received by the Company, on the one hand, and the total underwriting discounts
and commissions received by the Underwriters with respect to the shares of the
Stock purchased under this Agreement, on the other hand, bear to the total gross
proceeds from the offering of the shares of the Stock under this Agreement, in
each case as set forth in the table on the cover page of the Prospectus. The
relative fault shall be determined by reference to whether the untrue or alleged
untrue statement of a material fact or omission or alleged omission to state a
material fact relates to information supplied by the Company or the
Underwriters, the intent of the parties and their relative knowledge, access to
information and opportunity to correct or prevent such statement or omission.
The Company and the Underwriters agree that it would not be just and equitable
if contributions pursuant to this Section 11 were to be determined by pro rata
allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take into account
the equitable considerations referred to herein. The amount paid or payable by
an indemnified party as a result of the loss, claim, damage or liability, or
action in respect thereof, referred to above in this Section shall be deemed to
include, for purposes of this Section 11(e), any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
Section 11(e), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Stock underwritten by
it and distributed to the public was offered to the public exceeds the amount of
any damages which such Underwriter has otherwise paid or become liable to pay by
reason of any untrue or alleged untrue statement or omission or alleged


                                       23


<PAGE>   24
omission. No person guilty of fraudulent misrepresentation (within the meaning
of Section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. The
Underwriters' obligations to contribute as provided in this Section 11(e) are
several in proportion to their respective underwriting obligations and not
joint.

               (f) The Underwriters severally confirm and the Company
acknowledges that the statements with respect to the public offering of the
Stock by the Underwriters set forth on the cover page of, the legend concerning
over-allotments on the inside front cover page of and the concession and
reallowance figures appearing under the caption "Underwriting" in, the
Prospectus are correct and constitute the only information concerning such
Underwriters furnished in writing to the Company by or on behalf of the
Underwriters specifically for inclusion in the Registration Statement and the
Prospectus.

               12. Defaulting Underwriters.

               If, on either Delivery Date, any Underwriter defaults in the
performance of its obligations under this Agreement, the remaining
non-defaulting Underwriters shall be obligated to purchase the Stock which the
defaulting Underwriter agreed but failed to purchase on such Delivery Date in
the respective proportions which the number of shares of the Firm Stock set
opposite the name of each remaining non-defaulting Underwriter in Schedule 1
hereto bears to the total number of shares of the Firm Stock set opposite the
names of all the remaining non-defaulting Underwriters in Schedule 1 hereto;
provided, however, that the remaining non-defaulting Underwriters shall not be
obligated to purchase any of the Stock on such Delivery Date if the total number
of shares of the Stock which the defaulting Underwriter or Underwriters agreed
but failed to purchase on such date exceeds 9.09% of the total number of shares
of the Stock to be purchased on such Delivery Date, and any remaining
non-defaulting Underwriter shall not be obligated to purchase more than 110% of
the number of shares of the Stock which it agreed to purchase on such Delivery
Date pursuant to the terms of Section 3. If the foregoing maximums are exceeded,
the remaining non-defaulting Underwriters, or those other underwriters
satisfactory to the Representatives who so agree, shall have the right, but
shall not be obligated, to purchase, in such proportion as may be agreed upon
among them, all the Stock to be purchased on such Delivery Date. If the
remaining Underwriters or other underwriters satisfactory to the Representatives
do not elect to purchase the shares which the defaulting Underwriter or
Underwriters agreed but failed to purchase on such Delivery Date, this Agreement
(or, with respect to the Second Delivery Date, the obligation of the
Underwriters to purchase, and of the Company to sell, the Option Stock) shall
terminate without liability on the part of any non-defaulting Underwriter or the
Company, except that the Company will continue to be liable for the payment of
expenses to the extent set forth in Sections 8 and 14. As used in this
Agreement, the term "Underwriter" includes, for all purposes of this Agreement
unless the context requires otherwise, any party not listed in Schedule 1 hereto
who, pursuant to this Section 12, purchases Firm Stock which a defaulting
Underwriter agreed but failed to purchase.


                                       24


<PAGE>   25
               Nothing contained herein shall relieve a defaulting Underwriter
of any liability it may have to the Company for damages caused by its default.
If other underwriters are obligated or agree to purchase the Stock of a
defaulting or withdrawing Underwriter, either the Representatives or the Company
may postpone the Delivery Date for up to seven full business days in order to
effect any changes that in the opinion of counsel for the Company or counsel for
the Underwriters may be necessary in the Registration Statement, the Prospectus
or in any other document or arrangement.

               13. Termination. The obligations of the Underwriters hereunder
may be terminated by the Representatives by notice given to and received by the
Company prior to delivery of and payment for the Firm Stock if, prior to that
time, any of the events described in Sections 9(i) or 9(j), shall have occurred
or if the Underwriters shall decline to purchase the Stock for any reason
permitted under this Agreement.

               14. Reimbursement of Underwriters' Expenses. If the Company shall
fail to tender the Stock for delivery to the Underwriters by reason of any
failure, refusal or inability on the part of the Company to perform any
agreement on its part to be performed, or because any other condition of the
Underwriters' obligations hereunder required to be fulfilled by the Company is
not fulfilled, the Company will reimburse the Underwriters for all reasonable
out-of-pocket expenses (including fees and disbursements of counsel) incurred by
the Underwriters in connection with this Agreement and the proposed purchase of
the Stock, and upon demand the Company shall pay the full amount thereof to the
Representatives. If this Agreement is terminated pursuant to Section 12 by
reason of the default of one or more Underwriters, the Company shall not be
obligated to reimburse any defaulting Underwriter on account of those expenses.

               15. Notices, etc. All statements, requests, notices and
agreements hereunder shall be in writing, and:

                      (a) if to the Underwriters, shall be delivered or sent by
               mail, telex or facsimile transmission to Lehman Brothers Inc.,
               Three World Financial Center, New York, New York 10285,
               Attention: Syndicate Department (Fax: 212-526-6588), with a copy,
               in the case of any notice pursuant to Section 11(d), to the
               Director of Litigation, Office of the General Counsel, Lehman
               Brothers Inc., 3 World Financial Center, 10th Floor, New York, NY
               10285 with a copy to Gibson, Dunn & Crutcher LLP, One Montgomery
               Street, San Francisco, California 94104, Attention: Kenneth R.
               Lamb (Fax: 415-986-5309);

                      (b) if to the Company, shall be delivered or sent by mail,
               telex or facsimile transmission to the address of the Company set
               forth in the Registration Statement, Attention: Stanley
               Kazmierczak (Fax: 510-492-0808);

provided, however, that any notice to an Underwriter pursuant to Section 11(d)
shall be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its


                                       25


<PAGE>   26
address set forth in its acceptance telex to the Representatives, which address
will be supplied to any other party hereto by the Representatives upon request.
Any such statements, requests, notices or agreements shall take effect at the
time of receipt thereof. The Company shall be entitled to act and rely upon any
request, consent, notice or agreement given or made on behalf of the
Underwriters by Lehman Brothers Inc.

               16. Persons Entitled to Benefit of Agreement. This Agreement
shall inure to the benefit of and be binding upon the Underwriters, the Company,
and their respective successors. This Agreement and the terms and provisions
hereof are for the sole benefit of only those persons, except that (A) the
representations, warranties, indemnities and agreements of the Company contained
in this Agreement shall also be deemed to be for the benefit of the person or
persons, if any, who control any Underwriter within the meaning of Section 15 of
the Securities Act and (B) the indemnity agreement of the Underwriters contained
in Section 11(c) of this Agreement shall be deemed to be for the benefit of
directors of the Company, officers of the Company who have signed the
Registration Statement and any person controlling the Company within the meaning
of Section 15 of the Securities Act. Nothing in this Agreement is intended or
shall be construed to give any person, other than the persons referred to in
this Section 16, any legal or equitable right, remedy or claim under or in
respect of this Agreement or any provision contained herein.

               17. Survival. The respective indemnities, representations,
warranties and agreements of the Company and the Underwriters contained in this
Agreement or made by or on behalf on them, respectively, pursuant to this
Agreement, shall survive the delivery of and payment for the Stock and shall
remain in full force and effect, regardless of any investigation made by or on
behalf of any of them or any person controlling any of them.

               18. Definition of the Terms "Business Day" and "Subsidiary". For
purposes of this Agreement, (a) "business day" means any day on which the New
York Stock Exchange, Inc. is open for trading each Monday, Tuesday, Wednesday,
Thursday or Friday which is not a day on which banking institutions in New York
are generally authorized or obligated by law or executive order to close and (b)
"subsidiary" has the meaning set forth in Rule 405 of the Rules and Regulations.

               19. Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of New York, without reference to conflict
of law principles thereof.

               20. Counterparts. This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

               21 Consent to Jurisdiction. Each party irrevocably agrees that
any legal suit, action or proceeding arising out of or based upon this Agreement
or the transactions


                                       26


<PAGE>   27
contemplated hereby ("Related Proceedings") may be instituted in the federal
courts of the United States of America located in the City of New York or the
courts of the State of New York in each case located in the Borough of Manhattan
in the City of New York (collectively, the "Specified Courts"), and irrevocably
submits to the exclusive jurisdiction (except for proceedings instituted in
regard to the enforcement of a judgment of any such court (a "Related
Judgment"), as to which such jurisdiction is non-exclusive) of such courts in
any such suit, action or proceeding. The parties further agree that service of
any process, summons, notice or document by mail to such party's address set
forth above shall be effective service of process for any lawsuit, action or
other proceeding brought in any such court. The parties hereby irrevocably and
unconditionally waive any objection to the laying of venue of any lawsuit,
action or other proceeding in the Specified Courts, and hereby further
irrevocably and unconditionally waive and agree not to plead or claim in any
such court that any such lawsuit, action or other proceeding brought in any such
court has been brought in an inconvenient forum. Each party not located in the
United States hereby irrevocably appoints CT Corporation System, which currently
maintains a New York City office at 1633 Broadway, New York, New York 10019,
United States of America, as its agent to receive service of process or other
legal summons for purposes of any such action or proceeding that may be
instituted in any state or federal court in the City and State of New York.

               22. Waiver of Immunity. With respect to any Related Proceeding,
each party irrevocably waives, to the fullest extent permitted by applicable
law, all immunity (whether on the basis of sovereignty or otherwise) from
jurisdiction, service of process, attachment (both before and after judgment)
and execution to which it might otherwise be entitled in the Specified Courts,
and with respect to any Related Judgment, each party waives any such immunity in
the Specified Courts or any other court of competent jurisdiction, and will not
raise or claim or cause to be pleaded any such immunity at or in respect of any
such Related Proceeding or Related Judgment, including, without limitation, any
immunity pursuant to the United States Foreign Sovereign Immunities Act of 1976,
as amended.

               23. Headings. The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.


                            [SIGNATURE PAGE FOLLOWS]


                                       27


<PAGE>   28
               If the foregoing correctly sets forth the agreement between the
Company and the Underwriters, please indicate your acceptance in the space
provided for that purpose below.

                                   Very truly yours,

                                   VINA TECHNOLOGIES, INC.


                                   By
                                     --------------------------------------
                                   President and Chief Executive Officer






Accepted:

LEHMAN BROTHERS INC.

By
  -----------------------------------------------
        Authorized Representative


THOMAS WEISEL PARTNERS LLC

By
  -----------------------------------------------
        Authorized Representative


U.S. BANCORP PIPER JAFFRAY INC.

By                                                               _
  -----------------------------------------------
        Authorized Representative


For themselves and as Representatives
of the several Underwriters named
in Schedule 1 hereto




       [SIGNATURE PAGE TO VINA TECHNOLOGIES, INC. UNDERWRITING AGREEMENT]


                                       28


<PAGE>   29
                                   SCHEDULE 1


<TABLE>
<CAPTION>
                                                                                     Number of
        Underwriters                                                                   Shares
        ------------                                                                 ---------
<S>                                                                                  <C>
        Lehman Brothers Inc.
        Thomas Weisel Partners LLC
        U.S. Bancorp Piper Jaffray Inc.
                                                                                       ------
             Total
                                                                                       ------
</TABLE>





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