Document:

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                                                                     EXHIBIT 4.7

THIS WARRANT AND THE SHARES OF EQUITY SECURITIES THAT MAY BE PURCHASED PURSUANT
TO THE EXERCISE OF THIS WARRANT HAVE BEEN ACQUIRED SOLELY FOR INVESTMENT AND
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"ACT"), OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD, OFFERED
FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF SUCH REGISTRATION OR AN
OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND ITS COUNSEL THAT SUCH SALE,
OFFER, PLEDGE OR HYPOTHECATION IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS
DELIVERY REQUIREMENTS OF THE ACT AND OF ANY APPLICABLE STATE SECURITIES LAWS.

                              Occam Networks, Inc.

                   SERIES A-2 PREFERRED STOCK PURCHASE WARRANT

                                   ----------

     THIS CERTIFIES THAT, for value received, Alta California Partners III, L.P.
("Alta" and together with its permitted assignees, the "Holder") is entitled,
upon the terms and subject to the conditions hereinafter set forth, to subscribe
for and purchase (subject to Section 9 hereof) (i) a number of shares as shall
be determined below of the fully paid and nonassessable Series A-2 Preferred
Stock (the "Shares") of Occam Networks, Inc., a Delaware corporation (the
"Company"), at an exercise price per Share equal to $10.00 (the "Warrant
Exercise Price"), subject to the provisions and upon the terms and conditions
hereinafter set forth, or (ii) in the event the Series A-2 Preferred Stock of
the Company shall prior to exercise or exchange of this Warrant have been
automatically converted into Common Stock (the "Common Stock") of the Company
pursuant to the terms of the Company's Certificate of Incorporation, as then in
effect, the aggregate number of shares of Common Stock into which such number of
Shares would have been converted (the "Conversion Share Number") at an exercise
price per share of Common Stock equal to the aggregate Warrant Exercise Price
divided by the Conversion Share Number.

     This Warrant is entered into by the Company and Alta pursuant to Section 4
of Amendment No. 1 (the "Purchase Agreement Amendment") to the Series A-2
Preferred Stock Purchase Agreement (the "Purchase Agreement") dated as of March
8, 2004 by and among the Company, Alta, and the Investors (as defined in the
Purchase Agreement).

     The number of Shares issuable upon exercise of this Warrant shall equal the
number (rounded to the nearest whole share) determined by multiplying (i)
0.967335 by (ii) the quotient determined by dividing the Finance Deficit Amount
(as defined herein) by the Warrant Exercise Price. The "Financing Deficit
Amount" shall equal the amount determined by subtracting the Committed Financing
Amount (as defined herein) from $3,800,000. The "Committed Financing Amount"
shall equal the sum of (i) the aggregate principal amount of Convertible Notes
(as defined in the Purchase Agreement Amendment) that the Committed Investors
(as defined in the Purchase Agreement Amendment) shall have agreed to purchase
under the Note Agreement (as defined in the Purchase Agreement Amendment) plus
the aggregate gross proceeds that the Company may raise in

<PAGE>

connection with any sale or issuance of additional shares of Series A-2
Preferred Stock on or prior to the Commitment Date and (ii) the aggregate
proceeds in excess of $1.5 million that the Company raises in the Rights
Offering (as defined in the Purchase Agreement), determined as of the last
closing date thereof (the "Rights Offering Closing Date"). In the event the
Financing Deficit Amount is determined to be zero or less than zero as of either
the Commitment Date or the Rights Offering Closing Date, this Warrant shall be
deemed immediately cancelled and terminated in accordance with Section 9 hereof
and shall have no further force or effect.

     The Warrant is issued and delivered to the Holder as of March 8, 2004.

     1.   Method of Exercise; Payment.

          (a)  Cash Exercise. The purchase rights represented by this Warrant
may be exercised by the Holder from time to time, in whole or in part, during
the period specified in Section 9 hereof by the surrender of this Warrant (with
the notice of exercise form attached hereto as Exhibit A and the Investment
Representation Statement attached hereto as Exhibit B, each duly executed) at
the principal office of the Company, and by payment to the Company, by
certified, cashier's or other check acceptable to the Company or by wire
transfer in accordance with the Company's instructions, of an amount equal to
the aggregate Warrant Exercise Price of the Shares being purchased.

          (b)  Stock Certificates. In the event of any exercise of the rights
represented by this Warrant, certificates for the Shares so purchased shall be
delivered to the Holder within a reasonable time and, unless this Warrant has
been fully exercised or has expired, a new Warrant representing the Shares with
respect to which this Warrant shall not have been exercised shall also be issued
to the Holder within such time.

     2.   Stock Fully Paid; Reservation of Shares. All of the Shares issuable
upon exercise of the rights represented by this Warrant will, upon issuance and
receipt of the Warrant Exercise Price therefor, be fully paid and nonassessable.
During the period within which the rights represented by this Warrant may be
exercised, the Company shall at all times have authorized and reserved for
issuance sufficient Shares to provide for the exercise of the rights represented
by this Warrant.

     3.   Adjustment of Warrant Exercise Price and Number of Shares. The number
and kind of securities purchasable upon the exercise of this Warrant and the
Warrant Exercise Price therefor shall be subject to adjustment from time to time
as follows:

          (a)  Merger. If at any time there shall be a merger or consolidation
of the Company with or into another corporation where the Company is not the
surviving corporation or as a result of which all of the outstanding capital
stock of the Company is exchanged for capital stock of another corporation
(other than a merger or consolidation contemplated by Section 9(b)(iv)), then,
as a part of such merger or consolidation, lawful provision shall be made so
that the holder of this Warrant shall thereafter be entitled to receive upon
exercise of this Warrant, during the period specified herein and upon payment of
the aggregate Warrant Exercise Price then in effect, (i) the number of shares of
stock or other securities or property of the surviving or successor corporation
resulting from such merger or consolidation (or the corporation the capital
stock of which is issued

                                       -2-

<PAGE>

in exchange for the capital stock of the Company) or (ii) in the event the
consideration payable in connection with such transaction consists of cash or
other property, an amount of cash or such property, in either case, to which a
holder of the stock deliverable upon exercise of this Warrant would have been
entitled in such merger or consolidation if this Warrant had been exercised
immediately before such merger or consolidation. In any such case, appropriate
adjustment shall be made in the application of the provisions of this Warrant
with respect to the rights and interests of the Holder after the merger or
consolidation.

          (b)  Reclassification, etc. If the Company shall, at any time, by
subdivision, combination, or reclassification of securities or otherwise, change
any of the securities as to which purchase rights under this Warrant exist into
the same or a different number of securities of any other class or classes, this
Warrant shall be adjusted such that this Warrant shall thereafter represent the
right to acquire such number and kind of securities as would have been issuable
as the result of such change with respect to the securities which were subject
to the purchase rights under this Warrant immediately prior to such subdivision,
combination, reclassification or other change. In such case, the Warrant
Exercise Price per share of securities for which this Warrant is exercisable
shall be adjusted so that the aggregate Warrant Exercise Price of this Warrant
remains unchanged.

          (c)  Split, Subdivision or Combination of Shares. If the Company at
any time while this Warrant remains outstanding and unexpired shall split,
subdivide or combine the securities as to which purchase rights under this
Warrant exist, the Warrant Exercise Price shall be proportionately decreased in
the case of a split or subdivision (in which case the number of shares of
securities for which this Warrant is exercisable shall be proportionately
increased) or proportionately increased in the case of a combination (in which
case the number of shares of securities for which this Warrant is exercisable
shall be proportionately decreased).

     4.   Notices of Adjustments. Whenever the number of Shares purchasable
hereunder or the Warrant Exercise Price thereof shall be adjusted pursuant to
Section 3 hereof, the Company shall provide notice to the holder of this Warrant
setting forth, in reasonable detail, the event requiring the adjustment, the
amount of the adjustment, the method by which such adjustment was calculated,
and the number of Shares which may be purchased and the Warrant Exercise Price
therefor after giving effect to such adjustment.

     5.   Fractional Shares. No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Warrant. In lieu of
any fractional share to which such holder would otherwise be entitled, such
holder shall be entitled, at its option, to receive either (i) a cash payment
equal to the excess of the fair market value for such fractional share above the
Warrant Exercise Price for such fractional share (as determined in good faith by
the Board of Directors of the Company) or (ii) a whole share if the Holder
tenders the Warrant Exercise Price for one whole share.

     6.   Transfer, Exchange, Assignment, or Loss of Warrant.

          (a)  This Warrant may not be assigned or transferred except as
provided in this Section 6 and in accordance with and subject to the provisions
of the Securities Act of 1933, as amended (the "Securities Act"), and the Rules
and Regulations promulgated thereunder. Any

                                       -3-

<PAGE>

purported transfer or assignment made other than in accordance with this Section
6 shall be null and void and of no force or effect.

          (b)  Notwithstanding any other provision of this Warrant, the Holder
may not transfer this Warrant except (i) with the consent of the Company, (ii)
to an "affiliate" of such Holder (as defined in Rule 12b-2 under the Securities
Exchange Act of 1934, as amended), or (iii) to a partner (active or retired),
parent, child, or spouse of such Holder, or to a trust for the direct or
indirect benefit of any of the foregoing (and in each such case, as a condition
to such transfer, such transferee shall agree in writing for the benefit of the
Company to be bound by the terms of this Warrant).

          (c)  Prior to any permitted transfer of this Warrant, the Holder shall
notify the Company of its intention to effect such transfer, indicating the
circumstances of the proposed transfer and, upon request, furnish the Company
with an opinion of its counsel, in form and substance reasonably satisfactory to
counsel for the Company, to the effect that the proposed transfer may be made
without registration under the Securities Act or qualification under any
applicable state securities laws. The Company will promptly notify the Holder if
the opinion of counsel furnished to the Company is satisfactory to counsel for
the Company. Unless the Company notifies the Holder within ten (10) days after
its receipt of such opinion that such opinion is not satisfactory to counsel for
the Company, the Holder may proceed to effect the transfer.

          (d)  Unless a registration statement under the Securities Act is
effective with respect to the Shares or any other security issued upon exercise
of this Warrant, the certificate representing such Shares or other securities
shall bear the following legend, in addition to any legend imposed by applicable
state securities laws:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT").
     NO SALE OR DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN
     CONSENT OF THE COMPANY OR WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
     RELATED THERETO OR AN OPINION OF COUNSEL, REASONABLY SATISFACTORY TO
     THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR
     RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
     COMMISSION.

          (e)  Any assignment permitted hereunder shall be made by surrender of
this Warrant to the Company at its principal office with the Assignment Form
attached hereto as Exhibit C duly executed. In such event, the Company shall,
without charge for any issuance or transfer tax or other cost incurred by the
Company with respect to such transfer, execute and deliver a new Warrant in the
name of the assignee named in such instrument of assignment, and this Warrant
shall be promptly cancelled. This Warrant may be divided or combined with other
Warrants which carry the same rights upon presentation thereof at the principal
office of the Company, together with a written notice signed by the Holders
thereof, specifying the name and denominations in which such new Warrants are to
be issued.

                                       -4-

<PAGE>

          (f)  Upon receipt by the Company of satisfactory evidence of loss,
theft, destruction, or mutilation of this Warrant and of indemnity satisfactory
to the Company, and upon surrender and cancellation of this Warrant, if
mutilated, the Company will execute and deliver a new Warrant of like tenor and
date and any such lost, stolen, or destroyed Warrant shall thereupon become
void. Any such new Warrant executed and delivered shall constitute an additional
contractual obligation on the part of the Company, whether or not the Warrant so
lost, stolen, destroyed, or mutilated shall be at any time enforceable by
anyone.

     7.   No Rights as Shareholders. This Warrant does not entitle the Holder
hereof to any voting rights, dividend rights, or other rights as a shareholder
of the Company prior to the exercise hereof.

     8.   Saturdays, Sundays, Holidays, etc. If the last or appointed day for
the taking of any action or the expiration of any right required or granted
herein shall be a Saturday or a Sunday or shall be a legal holiday on which
banks in the State of California are closed for business, then such action may
be taken or such right may be exercised on the next succeeding day that is not a
Saturday or a Sunday or a legal holiday.

     9.   Exercise Period; Expiration of Warrant.

          (a)  Limitation on Exercisability. This Warrant shall not be
exercisable prior to the first business day after the Rights Offering Closing
Date.

          (b)  Termination and Expiration. This Warrant shall expire and shall
no longer be exercisable upon the first to occur of the following:

               (i)   on the Commitment Date in the event the Financing Deficit
Amount is then determined to be zero or less than zero;

               (ii)  on the Rights Offering Closing Date in the event the
Financing Deficit Amount is then determined to be zero or less than zero;

               (iii) at 5:00 p.m., local time in San Francisco, California, on
the eighteen month anniversary of the Commitment Date;

               (iv)  the closing of a merger or consolidation of the Company
with or into another entity in which the holders of voting securities of the
Company, immediately prior to such transaction, will hold less than 50% of the
voting securities of the surviving or successor entity or its parent,
immediately after such transaction; and

               (v)   the closing of the sale of all or substantially all of the
assets of the Company.

     The Company shall provide written notice of the closing of any transaction
contemplated pursuant to Sections 9(b)(iv) or 9(b)(v) not less than 20 business
days prior to the applicable closing.

                                       -5-

<PAGE>

     10.  Miscellaneous.

          (a)  Successors and Assigns. This Warrant shall not be assignable by
the Holder except as permitted by Section 6. This Warrant shall be binding upon
any successors or assigns of the Company.

          (b)  Governing Law. This Warrant shall be governed by and construed in
accordance with the laws of the State of California, without reference to the
conflict of laws provisions thereof.

          (c)  Market Stand-Off Agreement. The Holder and any permitted
transferee hereunder agrees, in connection with the first registration of the
Company's securities in connection with an underwritten public offering
following the date hereof, upon request of the Company or the underwriters
managing any underwritten offering of the Company's securities, not to sell,
make any short sale of, loan, grant any option for the purchase of or otherwise
dispose of any securities of the Company without the prior written consent of
the Company or such underwriters, as the case may be, for such period of time
(not to exceed 180 days) from the effective date of such registration as the
Company or the underwriters may specify; provided that (i) all officers and
directors of the Company then holding capital stock of the Company and (ii) all
stockholders holding in the aggregate at least 5% of the fully-diluted equity of
the Company are bound by similar agreements. The foregoing restriction shall not
apply to any securities of the Company held by the Holder or such permitted
transferee that are included in such registration. The Holder and each such
permitted transferee agrees that the Company may instruct its transfer agent to
place stop-transfer notations in its records to enforce the provisions of this
Section. Notwithstanding any other provision of this Warrant, the Company may
assign the obligations of the Holder and any permitted transferee under this
Section 10(c) to any underwriter of the Company's securities.

          (d)  Amendments. This Warrant may be amended and the observance of any
term of this Warrant may be waived only with the written consent of the Company
and the Holder of this Warrant.

          (e)  Notice. All notices required by this letter agreement must be in
writing and sent by certified mail, return receipt requested, or by overnight
courier providing proof of delivery. The date of notice shall be the date of
receipt. Notices hereunder shall be sent as follows:

     If to Company:           Occam Networks, Inc.
                              77 Robin Hill Road
                              Santa Barbara, CA 93117
                              Attention: Chief Financial Officer

                                       -6-

<PAGE>

     with a copy to:          Wilson Sonsini Goodrich & Rosati, P.C.
                              650 Page Mill Road
                              Palo Alto, CA 94304-1050
                              Attention: Thomas C. DeFilipps; Robert F. Kornegay

     If to Holder:            Alta California Partners III, L.P.
                              One Embarcadero Center, Suite 4050
                              San Francisco, CA 94111
                              Attention: Khaled Nasr

     with a copy to:          Morrison & Foerster, LLP
                              425 Market Street
                              San Francisco, CA 94105-2482
                              Attention: John W. Campbell

     A party may, by written notice, designate a different address for notices
or different or additional persons to be notified.

                  [Remainder of Page Intentionally Left Blank]

                                       -7-

<PAGE>

     IN WITNESS WHEREOF, each of the Company and Alta has caused this Series A-2
Preferred Stock Purchase Warrant to be executed by its officer thereunto duly
authorized as of the date first above written.

                                          OCCAM NETWORKS, INC.

                                          By:    /s/ Robert Howard-Anderson
                                              ----------------------------------
                                          Name:  Robert Howard-Anderson
                                                --------------------------------
                                          Title: President and Chief Executive
                                                 -------------------------------
                                                 Officer
                                                 -------------------------------

Acknowledged and Agreed:

ALTA CALIFORNIA PARTNERS III, L.P.
    By: Alta California Management Partners III, LLC

By:  /s/ Khaled Nasr
    ----------------------------------
    Director

 [Signature Page to Occam Networks Series A-2 Preferred Stock Purchase Warrant]

<PAGE>

                                    EXHIBIT A

                               NOTICE OF EXERCISE

                   SERIES A-2 PREFERRED STOCK PURCHASE WARRANT

To:  OCCAM NETWORKS, INC.

     1.   The undersigned hereby elects to purchase __________ shares of Series
A-2 Preferred Stock ("Stock") of Occam Networks, Inc. (the "Company") pursuant
to the terms of the attached Warrant, and tenders herewith payment of the
aggregate Warrant Exercise Price therefor and any transfer taxes payable
pursuant to the terms of the Warrant as well as any withholding taxes that may
be required in connection with the exercise thereof, together with an Investment
Representation Statement in form and substance satisfactory to legal counsel to
the Company.

     2.   The shares of Stock to be received by the undersigned upon exercise of
the Warrant are being acquired for the undersigned's own account, not as a
nominee or agent, and not with a view to resale or distribution of any part
thereof, and the undersigned has no present intention of selling, granting any
participation in, or otherwise distributing the same.

     3.   The undersigned understands that the shares of Stock are characterized
as "restricted securities" under the federal securities laws inasmuch as they
are being acquired from the Company in transactions not involving a public
offering and that under such laws and applicable regulations such securities may
be resold without registration under the Securities Act of 1933, as amended (the
"Securities Act"), only in certain limited circumstances. In this connection,
the undersigned represents that it is familiar with Rule 144 promulgated under
the Securities Act, as presently in effect, and understands the resale
limitations imposed thereby and by the Securities Act.

     4.   The undersigned understands the instruments evidencing the Stock may
bear the following legend, in addition to any legend required by applicable
state securities laws:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT").
     NO SALE OR DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN
     CONSENT OF THE COMPANY OR WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
     RELATED THERETO OR AN OPINION OF COUNSEL, REASONABLY SATISFACTORY TO
     THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR
     RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
     COMMISSION.

     5.   The undersigned acknowledges and agrees that the undersigned and the
Stock remain subject to and bound by the "Market Stand-Off Agreement" set forth
in Section 10(c) of the Warrant (without in any way otherwise limiting any other
obligation of the Company or the undersigned that may survive exercise of the
Warrant).

<PAGE>

     IN WITNESS WHEREOF, the Warrantholder has executed this Notice of Exercise
effective this _____ day of ___________, ________.

                                        WARRANTHOLDER

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

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

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

                                        Title:
                                               ---------------------------------

       [Notice Of Exercise Of Series A-2 Preferred Stock Purchase Warrant]

                                       -2-

<PAGE>

                                    EXHIBIT B

                       INVESTMENT REPRESENTATION STATEMENT

PURCHASER     :    _____________________

COMPANY       :    OCCAM NETWORKS, INC.

SECURITIES    :    _____________________

DATE          :    _____________________

     In connection with the purchase of the above-listed Securities, the
undersigned Purchaser represents to the Company the following:

     (a)  The undersigned is purchasing these Securities for its own account for
investment purposes only and not with a view to, or for the resale in connection
with, any "distribution" thereof for purposes of the Securities Act of 1933, as
amended (the "Securities Act").

     (b)  The undersigned understands that the Securities have not been
registered under the Securities Act in reliance upon a specific exemption
therefrom, which exemption depends upon, among other things, the bona fide
nature of its investment intent as expressed herein. In this connection, the
undersigned understands that, in the view of the Securities and Exchange
Commission (the "SEC"), the statutory basis for such exemption may be
unavailable if its representation was predicated solely upon a present intention
to hold these Securities for the minimum capital gains period specified under
tax statutes, for a deferred sale, for or until an increase or decrease in the
market price of the Securities, or for a period of one year or any other fixed
period in the future.

     (c)  The undersigned further understands that the Securities must be held
indefinitely unless subsequently registered under the Securities Act or unless
an exemption from registration is otherwise available (such as Rule 144 under
the Securities Act). Moreover, the undersigned understands that the Company is
under no obligation to register the Securities. In addition, the undersigned
understands that the certificate evidencing the Securities may be imprinted with
a legend which prohibits the transfer of the Securities unless they are
registered or such registration is not required in the opinion of counsel for
the Company.

     (d)  The undersigned is familiar with the provisions of Rule 144
promulgated under the Securities Act, which, in substance, permit limited public
resale of "restricted securities" acquired, directly or indirectly, from the
issuer thereof (or from an affiliate of such issuer), in a non-public offering
subject to the satisfaction of certain conditions, including, among other
things: (1) the availability of certain public information about the Company;
(2) the resale's occurring not less than one year after the party has purchased,
and made full payment for, within the meaning of Rule 144, the securities to be
sold; and, in the case of an affiliate, or of a non-affiliate who has held the

<PAGE>

securities less than two years, (3) the sale's being made through a broker in an
unsolicited "broker's transaction" or in transactions directly with a market
maker, as said term is defined under the Securities Exchange Act of 1934 (the
"Exchange Act") and the amount of securities being sold during any three month
period not exceeding the specified limitations stated therein, if applicable.
There can be no assurances that the requirements of Rule 144 will be met, or
that the Securities will ever be saleable.

     (e)  The undersigned further understands that at the time the undersigned
wishes to sell the Securities there may be no public market upon which to make
such a sale, and that, even if such a public market then exists, the Company may
not be satisfying the current public information requirements of Rule 144, and
that, in such event, the undersigned would be precluded from selling the
Securities under Rule 144 even if the applicable minimum holding period had been
satisfied.

     (f)  The undersigned further understands that in the event all of the
applicable requirements of Rule 144 are not satisfied, registration under the
Securities Act, compliance with Regulation A, compliance with some other
registration exemption or the notification to the Company of the proposed
disposition by it and the furnishing to the Company of (i) detailed information
regarding the disposition, and (ii) an opinion of its counsel to the effect that
such disposition will not require registration (the undersigned understands such
counsel's opinion shall concur with the opinion by counsel for the Company and
the undersigned shall have been informed of such compliance) will be required
and that, notwithstanding the fact that Rule 144 is not exclusive, the Staff of
the SEC has expressed its opinion that persons proposing to sell private
placement securities other than in a registered offering and otherwise than
pursuant to Rule 144 will have a substantial burden of proof in establishing
that an exemption from registration is available for such offers or sales, and
that such persons and their respective brokers who participate in such
transactions do so at their own risk.

                                        Signature of Purchaser:

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

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

                                        Title:
                                               ---------------------------------

                                       -2-

<PAGE>

                                    EXHIBIT C

                                 ASSIGNMENT FORM

          (To assign the foregoing Series A-2 Preferred Stock Purchase Warrant,
          execute this form and supply required information. Do not use this
          form to purchase shares.)

     FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby
are hereby assigned to

     ______________________________________________________________________
                                 (Please Print)

     whose address is _____________________________________________________
                                 (Please Print)

     ______________________________________________________________________

                                          Dated: ___________________, 20________

          Holder's Signature: _____________________________________________

          Holder's Address: _______________________________________________

Signature Guaranteed: _____________________________________________________

NOTE: The signature to this Assignment Form must correspond with the name as it
appears on the face of the Warrant, without alteration or enlargement or any
change whatever, and must be guaranteed by a bank or trust company. Officers of
corporations and those acting in a fiduciary or other representative capacity
should file proper evidence of authority to assign the foregoing Warrant.<PAGE>

                                                                     EXHIBIT 4.8

THIS WARRANT AND THE SHARES OF EQUITY SECURITIES THAT MAY BE PURCHASED PURSUANT
TO THE EXERCISE OF THIS WARRANT HAVE BEEN ACQUIRED SOLELY FOR INVESTMENT AND
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE
"ACT"), OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD, OFFERED
FOR SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF SUCH REGISTRATION OR AN
OPINION OF COUNSEL SATISFACTORY TO THE COMPANY AND ITS COUNSEL THAT SUCH SALE,
OFFER, PLEDGE OR HYPOTHECATION IS EXEMPT FROM THE REGISTRATION AND PROSPECTUS
DELIVERY REQUIREMENTS OF THE ACT AND OF ANY APPLICABLE STATE SECURITIES LAWS.

                              Occam Networks, Inc.

                   SERIES A-2 PREFERRED STOCK PURCHASE WARRANT

                                   ----------

     THIS CERTIFIES THAT, for value received, Alta Embarcadero Partners III, LLC
("Alta" and together with its permitted assignees, the "Holder") is entitled,
upon the terms and subject to the conditions hereinafter set forth, to subscribe
for and purchase (subject to Section 9 hereof) (i) a number of shares as shall
be determined below of the fully paid and nonassessable Series A-2 Preferred
Stock (the "Shares") of Occam Networks, Inc., a Delaware corporation (the
"Company"), at an exercise price per Share equal to $10.00 (the "Warrant
Exercise Price"), subject to the provisions and upon the terms and conditions
hereinafter set forth, or (ii) in the event the Series A-2 Preferred Stock of
the Company shall prior to exercise or exchange of this Warrant have been
automatically converted into Common Stock (the "Common Stock") of the Company
pursuant to the terms of the Company's Certificate of Incorporation, as then in
effect, the aggregate number of shares of Common Stock into which such number of
Shares would have been converted (the "Conversion Share Number") at an exercise
price per share of Common Stock equal to the aggregate Warrant Exercise Price
divided by the Conversion Share Number.

     This Warrant is entered into by the Company and Alta pursuant to Section 4
of Amendment No. 1 (the "Purchase Agreement Amendment") to the Series A-2
Preferred Stock Purchase Agreement (the "Purchase Agreement") dated as of March
8, 2004 by and among the Company, Alta, and the Investors (as defined in the
Purchase Agreement).

     The number of Shares issuable upon exercise of this Warrant shall equal the
number (rounded to the nearest whole share) determined by multiplying (i)
0.032665 by (ii) the quotient determined by dividing the Finance Deficit Amount
(as defined herein) by the Warrant Exercise Price. The "Financing Deficit
Amount" shall equal the amount determined by subtracting the Committed Financing
Amount (as defined herein) from $3,800,000. The "Committed Financing Amount"
shall equal the sum of (i) the aggregate principal amount of Convertible Notes
(as defined in the Purchase Agreement Amendment) that the Committed Investors
(as defined in the Purchase Agreement Amendment) shall have agreed to purchase
under the Note Agreement (as defined in the Purchase Agreement Amendment) plus
the aggregate gross proceeds that the Company may raise in

<PAGE>

connection with any sale or issuance of additional shares of Series A-2
Preferred Stock on or prior to the Commitment Date and (ii) the aggregate gross
proceeds in excess of $1.5 million that the Company raises in the Rights
Offering (as defined in the Purchase Agreement), determined as of the last
closing date thereof (the "Rights Offering Closing Date"). In the event the
Financing Deficit Amount is determined to be zero or less than zero as of either
the Commitment Date or the Rights Offering Closing Date, this Warrant shall be
deemed immediately cancelled and terminated in accordance with Section 9 hereof
and shall have no further force or effect.

     The Warrant is issued and delivered to the Holder as of March 8, 2004.

     1.   Method of Exercise; Payment.

          (a)  Cash Exercise. The purchase rights represented by this Warrant
may be exercised by the Holder from time to time, in whole or in part, during
the period specified in Section 9 hereof by the surrender of this Warrant (with
the notice of exercise form attached hereto as Exhibit A and the Investment
Representation Statement attached hereto as Exhibit B, each duly executed) at
the principal office of the Company, and by payment to the Company, by
certified, cashier's or other check acceptable to the Company or by wire
transfer in accordance with the Company's instructions, of an amount equal to
the aggregate Warrant Exercise Price of the Shares being purchased.

          (b)  Stock Certificates. In the event of any exercise of the rights
represented by this Warrant, certificates for the Shares so purchased shall be
delivered to the Holder within a reasonable time and, unless this Warrant has
been fully exercised or has expired, a new Warrant representing the Shares with
respect to which this Warrant shall not have been exercised shall also be issued
to the Holder within such time.

     2.   Stock Fully Paid; Reservation of Shares. All of the Shares issuable
upon exercise of the rights represented by this Warrant will, upon issuance and
receipt of the Warrant Exercise Price therefor, be fully paid and nonassessable.
During the period within which the rights represented by this Warrant may be
exercised, the Company shall at all times have authorized and reserved for
issuance sufficient Shares to provide for the exercise of the rights represented
by this Warrant.

     3.   Adjustment of Warrant Exercise Price and Number of Shares. The number
and kind of securities purchasable upon the exercise of this Warrant and the
Warrant Exercise Price therefor shall be subject to adjustment from time to time
as follows:

          (a)  Merger. If at any time there shall be a merger or consolidation
of the Company with or into another corporation where the Company is not the
surviving corporation or as a result of which all of the outstanding capital
stock of the Company is exchanged for capital stock of another corporation
(other than a merger or consolidation contemplated by Section 9(b)(iv)), then,
as a part of such merger or consolidation, lawful provision shall be made so
that the holder of this Warrant shall thereafter be entitled to receive upon
exercise of this Warrant, during the period specified herein and upon payment of
the aggregate Warrant Exercise Price then in effect, (i) the number of shares of
stock or other securities or property of the surviving or successor corporation
resulting from such merger or consolidation (or the corporation the capital
stock of which is issued

                                       -2-

<PAGE>

in exchange for the capital stock of the Company) or (ii) in the event the
consideration payable in connection with such transaction consists of cash or
other property, an amount of cash or such property, in either case, to which a
holder of the stock deliverable upon exercise of this Warrant would have been
entitled in such merger or consolidation if this Warrant had been exercised
immediately before such merger or consolidation. In any such case, appropriate
adjustment shall be made in the application of the provisions of this Warrant
with respect to the rights and interests of the Holder after the merger or
consolidation.

          (b)  Reclassification, etc. If the Company shall, at any time, by
subdivision, combination, or reclassification of securities or otherwise, change
any of the securities as to which purchase rights under this Warrant exist into
the same or a different number of securities of any other class or classes, this
Warrant shall be adjusted such that this Warrant shall thereafter represent the
right to acquire such number and kind of securities as would have been issuable
as the result of such change with respect to the securities which were subject
to the purchase rights under this Warrant immediately prior to such subdivision,
combination, reclassification or other change. In such case, the Warrant
Exercise Price per share of securities for which this Warrant is exercisable
shall be adjusted so that the aggregate Warrant Exercise Price of this Warrant
remains unchanged.

          (c)  Split, Subdivision or Combination of Shares. If the Company at
any time while this Warrant remains outstanding and unexpired shall split,
subdivide or combine the securities as to which purchase rights under this
Warrant exist, the Warrant Exercise Price shall be proportionately decreased in
the case of a split or subdivision (in which case the number of shares of
securities for which this Warrant is exercisable shall be proportionately
increased) or proportionately increased in the case of a combination (in which
case the number of shares of securities for which this Warrant is exercisable
shall be proportionately decreased).

     4.   Notices of Adjustments. Whenever the number of Shares purchasable
hereunder or the Warrant Exercise Price thereof shall be adjusted pursuant to
Section 3 hereof, the Company shall provide notice to the holder of this Warrant
setting forth, in reasonable detail, the event requiring the adjustment, the
amount of the adjustment, the method by which such adjustment was calculated,
and the number of Shares which may be purchased and the Warrant Exercise Price
therefor after giving effect to such adjustment.

     5.   Fractional Shares. No fractional shares or scrip representing
fractional shares shall be issued upon the exercise of this Warrant. In lieu of
any fractional share to which such holder would otherwise be entitled, such
holder shall be entitled, at its option, to receive either (i) a cash payment
equal to the excess of the fair market value for such fractional share above the
Warrant Exercise Price for such fractional share (as determined in good faith by
the Board of Directors of the Company) or (ii) a whole share if the Holder
tenders the Warrant Exercise Price for one whole share.

     6.   Transfer, Exchange, Assignment, or Loss of Warrant.

          (a)  This Warrant may not be assigned or transferred except as
provided in this Section 6 and in accordance with and subject to the provisions
of the Securities Act of 1933, as amended (the "Securities Act"), and the Rules
and Regulations promulgated thereunder. Any

                                       -3-

<PAGE>

purported transfer or assignment made other than in accordance with this Section
6 shall be null and void and of no force or effect.

          (b)  Notwithstanding any other provision of this Warrant, the Holder
may not transfer this Warrant except (i) with the consent of the Company, (ii)
to an "affiliate" of such Holder (as defined in Rule 12b-2 under the Securities
Exchange Act of 1934, as amended), or (iii) to a partner (active or retired),
parent, child, or spouse of such Holder, or to a trust for the direct or
indirect benefit of any of the foregoing (and in each such case, as a condition
to such transfer, such transferee shall agree in writing for the benefit of the
Company to be bound by the terms of this Warrant).

          (c)  Prior to any permitted transfer of this Warrant, the Holder shall
notify the Company of its intention to effect such transfer, indicating the
circumstances of the proposed transfer and, upon request, furnish the Company
with an opinion of its counsel, in form and substance reasonably satisfactory to
counsel for the Company, to the effect that the proposed transfer may be made
without registration under the Securities Act or qualification under any
applicable state securities laws. The Company will promptly notify the Holder if
the opinion of counsel furnished to the Company is satisfactory to counsel for
the Company. Unless the Company notifies the Holder within ten (10) days after
its receipt of such opinion that such opinion is not satisfactory to counsel for
the Company, the Holder may proceed to effect the transfer.

          (d)  Unless a registration statement under the Securities Act is
effective with respect to the Shares or any other security issued upon exercise
of this Warrant, the certificate representing such Shares or other securities
shall bear the following legend, in addition to any legend imposed by applicable
state securities laws:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT").
     NO SALE OR DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN
     CONSENT OF THE COMPANY OR WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
     RELATED THERETO OR AN OPINION OF COUNSEL, REASONABLY SATISFACTORY TO
     THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR
     RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
     COMMISSION.

          (e)  Any assignment permitted hereunder shall be made by surrender of
this Warrant to the Company at its principal office with the Assignment Form
attached hereto as Exhibit C duly executed. In such event, the Company shall,
without charge for any issuance or transfer tax or other cost incurred by the
Company with respect to such transfer, execute and deliver a new Warrant in the
name of the assignee named in such instrument of assignment, and this Warrant
shall be promptly cancelled. This Warrant may be divided or combined with other
Warrants which carry the same rights upon presentation thereof at the principal
office of the Company, together with a written notice signed by the Holders
thereof, specifying the name and denominations in which such new Warrants are to
be issued.

          (f)  Upon receipt by the Company of satisfactory evidence of loss,
theft, destruction, or mutilation of this Warrant and of indemnity satisfactory
to the Company, and upon

                                       -4-

<PAGE>

surrender and cancellation of this Warrant, if mutilated, the Company will
execute and deliver a new Warrant of like tenor and date and any such lost,
stolen, or destroyed Warrant shall thereupon become void. Any such new Warrant
executed and delivered shall constitute an additional contractual obligation on
the part of the Company, whether or not the Warrant so lost, stolen, destroyed,
or mutilated shall be at any time enforceable by anyone.

     7.   No Rights as Shareholders. This Warrant does not entitle the Holder
hereof to any voting rights, dividend rights, or other rights as a shareholder
of the Company prior to the exercise hereof.

     8.   Saturdays, Sundays, Holidays, etc. If the last or appointed day for
the taking of any action or the expiration of any right required or granted
herein shall be a Saturday or a Sunday or shall be a legal holiday on which
banks in the State of California are closed for business, then such action may
be taken or such right may be exercised on the next succeeding day that is not a
Saturday or a Sunday or a legal holiday.

     9.   Exercise Period; Expiration of Warrant.

          (a)  Limitation on Exercisability. This Warrant shall not be
exercisable prior to the first business day after the Rights Offering Closing
Date.

          (b)  Termination and Expiration. This Warrant shall expire and shall
no longer be exercisable upon the first to occur of the following:

               (i)   on the Commitment Date in the event the Financing Deficit
Amount is then determined to be zero or less than zero;

               (ii)  on the Rights Offering Closing Date in the event the
Financing Deficit Amount is then determined to be zero or less than zero;

               (iii) at 5:00 p.m., local time in San Francisco, California, on
the eighteen month anniversary of the Commitment Date;

               (iv)  the closing of a merger or consolidation of the Company
with or into another entity in which the holders of voting securities of the
Company, immediately prior to such transaction, will hold less than 50% of the
voting securities of the surviving or successor entity or its parent,
immediately after such transaction; and

               (v)   the closing of the sale of all or substantially all of the
assets of the Company.

     The Company shall provide written notice of the closing of any transaction
contemplated pursuant to Sections 9(b)(iv) or 9(b)(v) not less than 20 business
days prior to the applicable closing.

                                       -5-

<PAGE>

     10.  Miscellaneous.

          (a)  Successors and Assigns. This Warrant shall not be assignable by
the Holder except as permitted by Section 6. This Warrant shall be binding upon
any successors or assigns of the Company.

          (b)  Governing Law. This Warrant shall be governed by and construed in
accordance with the laws of the State of California, without reference to the
conflict of laws provisions thereof.

          (c)  Market Stand-Off Agreement. The Holder and any permitted
transferee hereunder agrees, in connection with the first registration of the
Company's securities in connection with an underwritten public offering
following the date hereof, upon request of the Company or the underwriters
managing any underwritten offering of the Company's securities, not to sell,
make any short sale of, loan, grant any option for the purchase of or otherwise
dispose of any securities of the Company without the prior written consent of
the Company or such underwriters, as the case may be, for such period of time
(not to exceed 180 days) from the effective date of such registration as the
Company or the underwriters may specify; provided that (i) all officers and
directors of the Company then holding capital stock of the Company and (ii) all
stockholders holding in the aggregate at least 5% of the fully-diluted equity of
the Company are bound by similar agreements. The foregoing restriction shall not
apply to any securities of the Company held by the Holder or such permitted
transferee that are included in such registration. The Holder and each such
permitted transferee agrees that the Company may instruct its transfer agent to
place stop-transfer notations in its records to enforce the provisions of this
Section. Notwithstanding any other provision of this Warrant, the Company may
assign the obligations of the Holder and any permitted transferee under this
Section 10(c) to any underwriter of the Company's securities.

          (d)  Amendments. This Warrant may be amended and the observance of any
term of this Warrant may be waived only with the written consent of the Company
and the Holder of this Warrant.

          (e)  Notice. All notices required by this letter agreement must be in
writing and sent by certified mail, return receipt requested, or by overnight
courier providing proof of delivery. The date of notice shall be the date of
receipt. Notices hereunder shall be sent as follows:

     If to Company:           Occam Networks, Inc.
                              77 Robin Hill Road
                              Santa Barbara, CA 93117
                              Attention: Chief Financial Officer

                                       -6-

<PAGE>

     with a copy to:          Wilson Sonsini Goodrich & Rosati, P.C.
                              650 Page Mill Road
                              Palo Alto, CA 94304-1050
                              Attention: Thomas C. DeFilipps; Robert F. Kornegay

     If to Holder:            Alta Embarcadero Partners III, LLC
                              One Embarcadero Center, Suite 4050
                              San Francisco, CA 94111
                              Attention:  Khaled Nasr

     with a copy to:          Morrison & Foerster, LLP
                              425 Market Street
                              San Francisco, CA 94105-2482
                              Attention: John W. Campbell

     A party may, by written notice, designate a different address for notices
or different or additional persons to be notified.

                [Remainder of Page Intentionally Left Blank]

                                       -7-

<PAGE>

     IN WITNESS WHEREOF, each of the Company and Alta has caused this Series A-2
Preferred Stock Purchase Warrant to be executed by its officer thereunto duly
authorized as of the date first above written.

                                          OCCAM NETWORKS, INC.

                                          By:    /s/ Robert Howard-Anderson
                                              ----------------------------------
                                          Name:  Robert Howard-Anderson
                                                 -------------------------------
                                          Title: President and Chief Executive
                                                 -------------------------------
                                                 Officer
                                                 -------------------------------

Acknowledged and Agreed:

ALTA EMBARCADERO PARTNERS III, LLC

By:  /s/ Hilary Strain
   ----------------------------------
   V.P. of Finance and Administration

 [Signature Page to Occam Networks Series A-2 Preferred Stock Purchase Warrant]

<PAGE>

                                    EXHIBIT A

                               NOTICE OF EXERCISE

                   SERIES A-2 PREFERRED STOCK PURCHASE WARRANT

To:  OCCAM NETWORKS, INC.

     1.   The undersigned hereby elects to purchase __________ shares of Series
A-2 Preferred Stock ("Stock") of Occam Networks, Inc. (the "Company") pursuant
to the terms of the attached Warrant, and tenders herewith payment of the
aggregate Warrant Exercise Price therefor and any transfer taxes payable
pursuant to the terms of the Warrant as well as any withholding taxes that may
be required in connection with the exercise thereof, together with an Investment
Representation Statement in form and substance satisfactory to legal counsel to
the Company.

     2.   The shares of Stock to be received by the undersigned upon exercise of
the Warrant are being acquired for the undersigned's own account, not as a
nominee or agent, and not with a view to resale or distribution of any part
thereof, and the undersigned has no present intention of selling, granting any
participation in, or otherwise distributing the same.

     3.   The undersigned understands that the shares of Stock are characterized
as "restricted securities" under the federal securities laws inasmuch as they
are being acquired from the Company in transactions not involving a public
offering and that under such laws and applicable regulations such securities may
be resold without registration under the Securities Act of 1933, as amended (the
"Securities Act"), only in certain limited circumstances. In this connection,
the undersigned represents that it is familiar with Rule 144 promulgated under
the Securities Act, as presently in effect, and understands the resale
limitations imposed thereby and by the Securities Act.

     4.   The undersigned understands the instruments evidencing the Stock may
bear the following legend, in addition to any legend required by applicable
state securities laws:

     THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "ACT").
     NO SALE OR DISPOSITION MAY BE EFFECTED WITHOUT THE PRIOR WRITTEN
     CONSENT OF THE COMPANY OR WITHOUT AN EFFECTIVE REGISTRATION STATEMENT
     RELATED THERETO OR AN OPINION OF COUNSEL, REASONABLY SATISFACTORY TO
     THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED UNDER THE ACT OR
     RECEIPT OF A NO-ACTION LETTER FROM THE SECURITIES AND EXCHANGE
     COMMISSION.

     5.   The undersigned acknowledges and agrees that the undersigned and the
Stock remain subject to and bound by the "Market Stand-Off Agreement" set forth
in Section 10(c) of the Warrant (without in any way otherwise limiting any other
obligation of the Company or the undersigned that may survive exercise of the
Warrant).

<PAGE>

     IN WITNESS WHEREOF, the Warrantholder has executed this Notice of Exercise
effective this ____ day of _____________, _______.

                                        WARRANTHOLDER

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

       [Notice Of Exercise Of Series A-2 Preferred Stock Purchase Warrant]

                                       -2-

<PAGE>

                                    EXHIBIT B

                       INVESTMENT REPRESENTATION STATEMENT

PURCHASER      :     ____________________

COMPANY        :     OCCAM NETWORKS, INC.

SECURITIES     :     ____________________

DATE           :     ____________________

     In connection with the purchase of the above-listed Securities, the
undersigned Purchaser represents to the Company the following:

     (a)  The undersigned is purchasing these Securities for its own account for
investment purposes only and not with a view to, or for the resale in connection
with, any "distribution" thereof for purposes of the Securities Act of 1933, as
amended (the "Securities Act").

     (b)  The undersigned understands that the Securities have not been
registered under the Securities Act in reliance upon a specific exemption
therefrom, which exemption depends upon, among other things, the bona fide
nature of its investment intent as expressed herein. In this connection, the
undersigned understands that, in the view of the Securities and Exchange
Commission (the "SEC"), the statutory basis for such exemption may be
unavailable if its representation was predicated solely upon a present intention
to hold these Securities for the minimum capital gains period specified under
tax statutes, for a deferred sale, for or until an increase or decrease in the
market price of the Securities, or for a period of one year or any other fixed
period in the future.

     (c)  The undersigned further understands that the Securities must be held
indefinitely unless subsequently registered under the Securities Act or unless
an exemption from registration is otherwise available (such as Rule 144 under
the Securities Act). Moreover, the undersigned understands that the Company is
under no obligation to register the Securities. In addition, the undersigned
understands that the certificate evidencing the Securities may be imprinted with
a legend which prohibits the transfer of the Securities unless they are
registered or such registration is not required in the opinion of counsel for
the Company.

     (d)  The undersigned is familiar with the provisions of Rule 144
promulgated under the Securities Act, which, in substance, permit limited public
resale of "restricted securities" acquired, directly or indirectly, from the
issuer thereof (or from an affiliate of such issuer), in a non-public offering
subject to the satisfaction of certain conditions, including, among other
things: (1) the availability of certain public information about the Company;
(2) the resale's occurring not less than one year after the party has purchased,
and made full payment for, within the meaning of Rule 144, the securities to be
sold; and, in the case of an affiliate, or of a non-affiliate who has held the

<PAGE>

securities less than two years, (3) the sale's being made through a broker in an
unsolicited "broker's transaction" or in transactions directly with a market
maker, as said term is defined under the Securities Exchange Act of 1934 (the
"Exchange Act") and the amount of securities being sold during any three month
period not exceeding the specified limitations stated therein, if applicable.
There can be no assurances that the requirements of Rule 144 will be met, or
that the Securities will ever be saleable.

     (e)  The undersigned further understands that at the time the undersigned
wishes to sell the Securities there may be no public market upon which to make
such a sale, and that, even if such a public market then exists, the Company may
not be satisfying the current public information requirements of Rule 144, and
that, in such event, the undersigned would be precluded from selling the
Securities under Rule 144 even if the applicable minimum holding period had been
satisfied.

     (f)  The undersigned further understands that in the event all of the
applicable requirements of Rule 144 are not satisfied, registration under the
Securities Act, compliance with Regulation A, compliance with some other
registration exemption or the notification to the Company of the proposed
disposition by it and the furnishing to the Company of (i) detailed information
regarding the disposition, and (ii) an opinion of its counsel to the effect that
such disposition will not require registration (the undersigned understands such
counsel's opinion shall concur with the opinion by counsel for the Company and
the undersigned shall have been informed of such compliance) will be required
and that, notwithstanding the fact that Rule 144 is not exclusive, the Staff of
the SEC has expressed its opinion that persons proposing to sell private
placement securities other than in a registered offering and otherwise than
pursuant to Rule 144 will have a substantial burden of proof in establishing
that an exemption from registration is available for such offers or sales, and
that such persons and their respective brokers who participate in such
transactions do so at their own risk.

                                        Signature of Purchaser:

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

                                       -2-

<PAGE>

                                    EXHIBIT C

                                 ASSIGNMENT FORM

          (To assign the foregoing Series A-2 Preferred Stock Purchase Warrant,
          execute this form and supply required information. Do not use this
          form to purchase shares.)

     FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced thereby
are hereby assigned to

     ______________________________________________________________________
                                 (Please Print)

     whose address is _____________________________________________________
                                 (Please Print)

     ______________________________________________________________________

                                          Dated: ___________________, 20________

          Holder's Signature: _____________________________________________

          Holder's Address: _______________________________________________

Signature Guaranteed: _____________________________________________________

NOTE: The signature to this Assignment Form must correspond with the name as it
appears on the face of the Warrant, without alteration or enlargement or any
change whatever, and must be guaranteed by a bank or trust company. Officers of
corporations and those acting in a fiduciary or other representative capacity
should file proper evidence of authority to assign the foregoing Warrant.

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