Document:

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                                                                    Exhibit 10.5

                                                                       NO. CSW-7

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE BEEN ACQUIRED FOR
INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED, OR ANY STATE SECURITIES LAWS. SUCH SECURITIES MAY NOT BE SOLD OR
TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN EXEMPTION THEREFROM UNDER
SAID ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

                       WARRANT TO PURCHASE 850,000 SHARES
                               OF COMMON STOCK OF
                                  FVC.COM, INC.
                            (VOID AFTER JUNE 8, 2005)

         This certifies that VULCAN VENTURES INCORPORATED or its assigns (the
"HOLDER"), for value received, is entitled to purchase from FVC.COM, INC., a
Delaware corporation (the "COMPANY"), having a place of business at 3393
Octavius Drive, Suite 102, Santa Clara, CA 95054, a maximum of 850,000 fully
paid and nonassessable shares of the Company's Common Stock ("COMMON STOCK") for
cash at a price of $7.00 per share (the "STOCK PURCHASE PRICE") at any time or
from time to time up to and including 5:00 p.m. (Pacific time) on June 8, 2005
(the "EXPIRATION DATE"), upon surrender to the Company at its principal office
(or at such other location as the Company may advise the Holder in writing) of
this Warrant properly endorsed with the Form of Subscription attached hereto
duly filled in and signed and, if applicable, upon payment in cash or by check
of the aggregate Stock Purchase Price for the number of shares for which this
Warrant is being exercised determined in accordance with the provisions hereof.
The Stock Purchase Price and the number of shares purchasable hereunder are
subject to adjustment as provided in Section 3 of this Warrant. This Warrant is
issued pursuant to that certain Stock Purchase Agreement dated as of June 8,
2000 by and between the Holder and the Company (the "STOCK PURCHASE AGREEMENT").

         This Warrant is subject to the following terms and conditions:

         1.       EXERCISE; ISSUANCE OF CERTIFICATES; PAYMENT FOR SHARES.

                  1.1      GENERAL. This Warrant is exercisable at the option of
the holder of record hereof, at any time or from time to time, up to the
Expiration Date for all or any part of the shares of Common Stock (but not for a
fraction of a share) which may be purchased hereunder. The Company agrees that
the shares of Common Stock purchased under this Warrant shall be and are deemed
to be issued to the Holder hereof as the record owner of such shares as of the
close of business on the date on which this Warrant shall have been surrendered,
properly endorsed, the completed, executed Form of Subscription delivered and
payment made for such shares. Certificates for the shares of Common Stock so
purchased, together with any other securities or property to which the Holder
hereof is entitled upon such exercise, shall be delivered to the Holder hereof
by the Company at the Company's expense within a reasonable time after the
rights represented by this Warrant have been so exercised. In case of a purchase
of less than all

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the shares which may be purchased under this Warrant, the Company shall cancel
this Warrant and execute and deliver a new Warrant or Warrants of like tenor for
the balance of the shares purchasable under the Warrant surrendered upon such
purchase to the Holder hereof within a reasonable time. Each stock certificate
so delivered shall be in such denominations of Common Stock as may be requested
by the Holder hereof and shall be registered in the name of such Holder.

         2.       SHARES TO BE FULLY PAID; RESERVATION OF SHARES. The Company
covenants and agrees that all shares of Common Stock or any other securities
which may be issued upon the exercise of the rights represented by this Warrant
will, upon issuance, be duly authorized, validly issued, fully paid and
nonassessable and free from all preemptive rights of any stockholder and free of
all taxes, liens and charges with respect to the issue thereof. The Company
further covenants and agrees that, during the period within which the rights
represented by this Warrant may be exercised, the Company will at all times have
authorized and reserved, for the purpose of issue or transfer upon exercise of
the subscription rights evidenced by this Warrant, a sufficient number of shares
of authorized but unissued Common Stock, or other securities and property, when
and as required to provide for the exercise of the rights represented by this
Warrant. The Company will take all such action as may be necessary to assure
that such shares of Common Stock may be issued as provided herein without
violation of any applicable law or regulation, or of any requirements of any
domestic securities exchange upon which the Common Stock may be listed;
provided, however, subject to the Company's obligations pursuant to that certain
Registration Rights Agreement, dated as of June 8, 2000, between the Company and
Holder that the Company shall not be required to effect a registration under
Federal or State securities laws with respect to such exercise. The Company will
not take any action which would result in any adjustment of the Stock Purchase
Price (as set forth in Section 3 hereof) if the total number of shares of Common
Stock issuable after such action upon exercise of all outstanding warrants,
together with all shares of Common Stock then outstanding and all shares of
Common Stock then issuable upon exercise of all options and upon the conversion
of all convertible securities then outstanding, would exceed the total number of
shares of Common Stock then authorized by the Company's Amended and Restated
Certificate of Incorporation.

         3.       ADJUSTMENT OF STOCK PURCHASE PRICE AND NUMBER OF SHARES. The
Stock Purchase Price and the number of shares purchasable upon the exercise of
this Warrant shall be subject to adjustment from time to time upon the
occurrence of certain events described in this Section 3. Upon each adjustment
of the Stock Purchase Price, the Holder of this Warrant shall thereafter be
entitled to purchase, at the Stock Purchase Price resulting from such
adjustment, the number of shares obtained by multiplying the Stock Purchase
Price in effect immediately prior to such adjustment by the number of shares
purchasable pursuant hereto immediately prior to such adjustment, and dividing
the product thereof by the Stock Purchase Price resulting from such adjustment.

                  3.1      SUBDIVISION OR COMBINATION OF STOCK. In case the
Company shall at any time subdivide its outstanding shares of Common Stock into
a greater number of shares, the Stock Purchase Price in effect immediately prior
to such subdivision shall be proportionately

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reduced, and conversely, in case the outstanding shares of Common Stock of the
Company shall be combined into a smaller number of shares, the Stock Purchase
Price in effect immediately prior to such combination shall be proportionately
increased.

                  3.2      DIVIDENDS IN COMMON STOCK, OTHER STOCK, PROPERTY,
RECLASSIFICATION. If at any time or from time to time the holders of Common
Stock (or any shares of stock or other securities at the time receivable upon
the exercise of this Warrant) shall have received or become entitled to receive,
without payment therefor,

                           (a)      Common Stock or any shares of stock or other
securities which are at any time directly or indirectly convertible into or
exchangeable for Common Stock, or any rights or options to subscribe for,
purchase or otherwise acquire any of the foregoing by way of dividend or other
distribution,

                           (b)      any cash paid or payable otherwise than as a
cash dividend, or

                           (c)      Common Stock or additional stock or other
securities or property (including cash) by way of spinoff, split-up,
reclassification, combination of shares or similar corporate rearrangement
(other than shares of Common Stock issued as a stock split or adjustments in
respect of which shall be covered by the terms of Section 3.1 above), then and
in each such case, the Holder hereof shall, upon the exercise of this Warrant,
be entitled to receive, in addition to the number of shares of Common Stock
receivable thereupon, and without payment of any additional consideration
therefor, the amount of stock and other securities and property (including cash
in the cases referred to in clause (b) above and this clause (c)) which such
Holder would hold on the date of such exercise had the Holder been the holder of
record of such Common Stock as of the date on which holders of Common Stock
received or became entitled to receive such shares or all other additional stock
and other securities and property.

                  3.3      REORGANIZATION, RECLASSIFICATION, CONSOLIDATION,
MERGER OR SALE. If any recapitalization, reclassification or reorganization of
the capital stock of the Company, or any consolidation or merger of the Company
with another corporation, or the sale of all or substantially all of its assets
or other transaction shall be effected in such a way that holders of Common
Stock shall be entitled to receive stock, securities, or other assets or
property (a "CHANGE"), then, as a condition of such Change, lawful and adequate
provisions shall be made by the Company whereby the Holder hereof shall
thereafter have the right to purchase and receive (in lieu of the shares of the
Common Stock of the Company immediately theretofore purchasable and receivable
upon the exercise of the rights represented hereby) such shares of stock,
securities or other assets or property as may be issued or payable with respect
to or in exchange for a number of outstanding shares of such Common Stock equal
to the number of shares of such stock immediately theretofore purchasable and
receivable upon the exercise of the rights represented hereby.

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                  3.4      ADJUSTMENTS OF PURCHASE PRICE FOR CERTAIN DILUTING
ISSUES.

                  (a)      SPECIAL DEFINITIONS. For purposes of this Section
3.4, the following definitions apply:

                           (i)      "OPTIONS" shall mean rights, options, or
                           warrants to subscribe for, purchase or otherwise
                           acquire either Common Stock or Convertible
                           Securities.

                           (ii)     "ORIGINAL ISSUE DATE" shall mean the date on
                           which this Warrant was issued.

                           (ii)     "CONVERTIBLE SECURITIES" shall mean any
                           evidences of indebtedness, shares (other than Common
                           Stock) or other securities convertible into or
                           exchangeable for Common Stock.

                           (iii)    "ADDITIONAL SHARES OF COMMON STOCK" shall
                           mean all shares of Common Stock issued (or, pursuant
                           to Section 3.4(c) deemed to be issued) by the Company
                           after the Original Issue Date, other than shares of
                           Common Stock:

                                    (A) issued or issuable to officers,
                                    directors, employees or advisors of, or
                                    consultants or independent contractors to,
                                    the Company, pursuant to options, warrants
                                    or other Common Stock purchase rights
                                    granted in accordance with plans or other
                                    arrangements approved by the Board of
                                    Directors of the Company and, as required by
                                    law, the Company's stockholders;

                                    (B) issued in connection with any merger,
                                    consolidation or similar transaction, or any
                                    acquisition of assets or a business, in
                                    accordance with agreements or other
                                    arrangements approved by the Board of
                                    Directors of the Company;

                                    (C) issued or issuable upon conversion of
                                    shares of Series A Preferred Stock;

                                    (D) issued or issuable as a dividend or
                                    distribution on the Series A Preferred
                                    Stock;

                                    (E) for which adjustment of the Stock
                                    Purchase Price and the number of shares of
                                    Common Stock into which this Warrant is
                                    exercisable is made pursuant to Section 3.1
                                    or for which a distribution with respect to
                                    this Warrant is provided for pursuant to
                                    Section 3.2;

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                                    (F) issued pursuant to any equipment leasing
                                    arrangement or debt financing from a bank or
                                    similar financial institution approved by
                                    the Board of Directors of the Company not to
                                    exceed 100,000 shares of Common Stock in the
                                    aggregate;

                                    (G) issued or issuable pursuant to Options
                                    outstanding as of the Original Issuance
                                    Date; and

                                    (H) issued or issuable upon exercise of this
                                    Warrant.

                           (iv)     "SERIES A PREFERRED STOCK" shall mean the
                           Series A Convertible Preferred Stock, $.001 par value
                           per share, of the Company.

                  (b)      NO ADJUSTMENT OF STOCK PURCHASE PRICE. No adjustment
in the Stock Purchase Price of this Warrant shall be made in respect of the
issuance of Additional Shares of Common Stock unless the consideration per share
for an Additional Share of Common Stock issued or deemed to be issued by the
Company is less than the Stock Purchase Price in effect on the date of, and
immediately prior to such issue, for this Warrant.

                  (c)      DEEMED ISSUE OF ADDITIONAL SHARES OF COMMON STOCK. In
the event the Company at any time or from time to time after the Original Issue
Date shall issue any Options or Convertible Securities, then the maximum number
of shares (as set forth in the instrument relating thereto without regard to any
provisions contained therein designed to protect against dilution) of Common
Stock issuable upon the exercise of such Options or, in the case of Convertible
Securities and Options therefor, the conversion or exchange of such Convertible
Securities, shall be deemed to be Additional Shares of Common Stock issued as of
the time of such issuance of Options or Convertible Securities; provided,
however, that Additional Shares of Common Stock shall not be deemed to have been
issued unless the consideration per share (determined pursuant to Section 3.4(e)
hereof) of such Additional Shares of Common Stock would be less than the Stock
Purchase Price in effect on the date of and immediately prior to such issuance
of Options or Convertible Securities, or such record date, as the case may be;
and provided further that in any such case in which Additional Shares of Common
Stock are deemed to be issued:

                           (i) no further adjustments in the Stock Purchase
                           Price shall be made upon the subsequent issue of
                           Convertible Securities or shares of Common Stock upon
                           the exercise of such Options or conversion or
                           exchange of such Convertible Securities;

                           (ii) if such Options or Convertible Securities by
                           their terms provided, with the passage of time or
                           otherwise, for any increase in the consideration
                           payable to the Company, or decrease in the number of
                           shares of Common Stock issuable, upon the exercise,
                           conversion or exchange thereof, the Stock Purchase
                           Price computed upon the original issue thereof (or
                           upon

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                           the occurrence of a record date with respect
                           thereto), and any subsequent adjustments based
                           thereon, shall, upon any such increase or decrease
                           becoming effective, be recomputed to reflect such
                           increase or decrease insofar as it affects such
                           Options or the rights of conversion or exchange under
                           such Convertible Securities; provided, however, that
                           no such adjustment of the Stock Purchase Price shall
                           affect Common Stock previously issued upon exercise
                           of this Warrant;

                           (iii) Upon the expiration of any such Options or any
                           rights of conversion or exchange under such
                           Convertible Securities which shall not have been
                           exercised, the Stock Purchase Price computed upon the
                           original issue thereof (or upon the occurrence of a
                           record date with respect thereto), and any subsequent
                           adjustments based thereon, shall, upon such
                           expiration, be recomputed as if:

                                    (A) in the case of Convertible Securities or
                                    Options for Common Stock, the only
                                    Additional Shares of Common Stock issued
                                    were the shares of Common Stock, if any,
                                    actually issued upon the exercise of such
                                    Options or the conversion or exchange of
                                    such Convertible Securities and the
                                    consideration received therefor was the
                                    consideration actually received by the
                                    Company for the issue of all such Options,
                                    whether or not exercised, plus the
                                    consideration actually received by the
                                    Company upon such exercise, or for the issue
                                    of all such Convertible Securities which
                                    were actually converted or exchanged, plus
                                    additional consideration, if any, actually
                                    received by the Company upon such conversion
                                    or exchange, and

                                    (B) in the case of Options for Convertible
                                    Securities, only the Convertible Securities,
                                    if any, actually issued upon the exercise
                                    thereof were issued at the time of issue of
                                    such Options and the consideration received
                                    by the Company for Additional Shares of
                                    Common Stock deemed to have been then issued
                                    was the consideration actually received by
                                    the Company for the issue of all such
                                    Options, whether or not exercised, plus the
                                    consideration deemed to have been received
                                    by the Company (determined pursuant to
                                    Section 3.4(e)) upon the issue of the
                                    Convertible Securities with respect to which
                                    such Options were actually exercised;

                           (iv) no readjustment pursuant to Sections 3.4(c)(ii)
                           or (iii) above shall have the effect of increasing
                           the Stock Purchase Price to an amount which exceeds
                           the lower of (1) the Stock Purchase Price on the
                           original adjustment date, or (2) the Stock Purchase
                           Price that would have resulted from any issuance of

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                           Additional Shares of Common Stock between the
                           original adjustment date and such readjustment date;

                           (v) in the case of any Options which expire by their
                           terms not more than sixty (60) days after the date of
                           issue thereof, no adjustment of the Stock Purchase
                           Price shall be made, except to the extent this
                           Warrant is exercised in such period, until the
                           expiration or exercise of all such Options, whereupon
                           such adjustment shall be made in the same manner
                           provided in Section 3.4(c)(iii) above; and

                           (vi) if any such record date shall have been fixed
                           and such Options or Convertible Securities are not
                           issued on the date fixed therefor, the adjustment
                           previously made in the Stock Purchase Price which
                           became effective on such record date shall be
                           canceled as of the close of business on such record
                           date, and shall instead be made on the actual date of
                           issuance, if any, of such Options or Convertible
                           Securities.

                  (d) ADJUSTMENT OF PURCHASE PRICE UPON ISSUANCE OF ADDITIONAL
SHARES OF COMMON STOCK. In the event the Company shall issue Additional Shares
of Common Stock (including Additional Shares of Common Stock deemed to be issued
pursuant to Section 3.4(c)) without consideration or for a consideration per
share less than the Stock Purchase Price in effect on the date of and
immediately prior to such issue, then and in such event, the Stock Purchase
Price shall be reduced, concurrently with such issue, to a price (calculated to
the nearest cent) determined by multiplying the Stock Purchase Price then in
effect by a fraction, the numerator of which shall be the number of shares of
Common Stock outstanding (determined on a fully diluted basis, as described
below) immediately prior to such issue plus the number of shares of Common Stock
which the aggregate consideration received by the Company for the total number
of Additional Shares of Common Stock so issued would purchase at the Stock
Purchase Price then in effect, and the denominator of which shall be the number
of shares of Common Stock outstanding (determined on a fully diluted basis, as
described below) immediately prior to such issue plus the number of such
Additional Shares of Common Stock so issued. For the purposes of the above
calculation, the number of shares of Common Stock outstanding immediately prior
to such issuance shall be calculated on a fully diluted basis, as if all shares
of Convertible Securities had been fully converted into shares of Common Stock
immediately prior to such issuance and this Warrant and any outstanding Options
had been fully exercised immediately prior to such issuance (and the resulting
securities fully converted into shares of Common Stock, if so convertible) as of
such date but not including in such calculation any additional shares of Common
Stock issuable with respect to this Warrant, Convertible Securities or
outstanding Options solely as a result of the adjustment of the Stock Purchase
Price (or other conversion ratios) resulting from the issuance of Additional
Shares of Common Stock causing such adjustment. For the purposes of the
foregoing, outstanding Options shall be deemed to include (without

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duplication) any Options issued to directors, officers, employees or advisors
of, or consultants to, the Company in accordance with plans or other
arrangements approved by the Board of Directors of the Company.

                  (e) DETERMINATION OF CONSIDERATION. For purposes of this
Section 3.4, the consideration received by the Company for the issuance of any
Additional Shares of Common Stock shall be computed as follows:

                           (i)      CASH AND PROPERTY. Such consideration shall:

                                    (A) insofar as it consists of cash, be
                                    computed at the aggregate amount of cash
                                    received by the Company, excluding amounts
                                    paid or payable for accrued interest or
                                    accrued dividends;

                                    (B) insofar as it consists of services,
                                    goods or other property other than cash, be
                                    computed at the fair value thereof at the
                                    time of such issue, as determined in good
                                    faith by the Board of Directors of the
                                    Company; and

                                    (C) in the event Additional Shares of Common
                                    Stock are issued together with other shares
                                    or securities or other assets of the Company
                                    for consideration which covers both cash and
                                    services, goods or other property other than
                                    cash, be in the proportion of such
                                    consideration so received, computed as
                                    provided in clauses (A) and (B) above, as
                                    determined in good faith by the Board of
                                    Directors of the Company.

                           (ii) OPTIONS AND CONVERTIBLE SECURITIES. The
                           consideration per share received by the Company for
                           Additional Shares of Common Stock deemed to have been
                           issued pursuant to Section 3.4(c) relating to Options
                           and Convertible Securities, shall be determined by
                           dividing:

                                    (A) the total amount, if any, received or
                                    receivable by the Company as consideration
                                    for the issue of such Options or Convertible
                                    Securities, plus the maximum aggregate
                                    amount of additional consideration (as set
                                    forth in the instruments relating thereto,
                                    without regard to any provision contained
                                    therein designed to protect against
                                    dilution) payable to the Company upon the
                                    exercise of such Options or the conversion
                                    or exchange of such Convertible Securities,
                                    or in the case of Options for Convertible
                                    Securities, the exercise of such Options for
                                    Convertible

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                                    Securities and the conversion or exchange of
                                    such Convertible Securities by

                                    (B) the maximum number of shares of Common
                                    Stock (as set forth in the instruments
                                    relating thereto, without regard to any
                                    provision contained therein designed to
                                    protect against dilution) issuable upon the
                                    exercise of such Options or the conversion
                                    or exchange of such Convertible Securities.

                  3.5      NOTICES OF ADJUSTMENT.

                           (a)      Immediately upon any adjustment in the
number or class of shares subject to this Warrant and of the Stock Purchase
Price, the Company shall give written notice thereof to the Holder, setting
forth in reasonable detail and certifying the calculation of such adjustment.

                           (b)      The Company shall give written notice to
the Holder at least 10 business days prior to the date on which the Company
closes its books or takes a record for determining rights to receive any
dividends or distributions.

                           (c)      The Company shall also give written notice
to the Holder at least 20 business days prior to the date on which a Change
shall take place.

         4.       ISSUE TAX. The issuance of certificates for shares of Common
Stock upon the exercise of this Warrant shall be made without charge to the
Holder of this Warrant for any issue tax (other than any applicable income
taxes) in respect thereof; provided, however, that the Company shall not be
required to pay any tax which may be payable in respect of any transfer involved
in the issuance and delivery of any certificate in a name other than that of the
Holder of the Warrant being exercised.

         5.       CLOSING OF BOOKS. The Company will at no time close its
transfer books against the transfer of any warrant or of any shares of Common
Stock issued or issuable upon the exercise of any warrant in any manner which
interferes with the timely exercise of this Warrant.

         6.       NO DIMINUTION OF VALUE. The Company will not take any action
to terminate this Warrant or to diminish it in value.

         7.       FURNISH INFORMATION. The Company will promptly deliver to the
Holder upon request copies of all financial statements, reports and proxy
statements which the Company shall have sent to its stockholders generally.

         8.       NO VOTING OR DIVIDEND RIGHTS; LIMITATION OF LIABILITY. Nothing
contained in this Warrant shall be construed as conferring upon the Holder
hereof the right to vote or to consent or to receive notice as a stockholder of
the Company or any other matters or any rights whatsoever as a stockholder of
the Company. No dividends or interest shall be payable or

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accrued in respect of this Warrant or the interest represented hereby or the
shares purchasable hereunder until, and only to the extent that, this Warrant
shall have been exercised. No provisions hereof, in the absence of affirmative
action by the Holder to purchase shares of Common Stock, and no mere enumeration
herein of the rights or privileges of the Holder hereof, shall give rise to any
liability of such Holder for the Stock Purchase Price or as a stockholder of the
Company, whether such liability is asserted by the Company or by its creditors.

         9.       WARRANTS TRANSFERABLE. Subject to compliance with applicable
federal and state securities laws, this Warrant and all rights hereunder are
transferable to any affiliate of Holder, in whole or in part, without charge to
the holder hereof (except for transfer taxes), upon surrender of this Warrant
properly endorsed. Each taker and holder of this Warrant, by taking or holding
the same, consents and agrees that this Warrant, when endorsed in blank, shall
be deemed negotiable, and that the holder hereof, when this Warrant shall have
been so endorsed, may be treated by the Company, at the Company's option, and
all other persons dealing with this Warrant as the absolute owner hereof for any
purpose and as the person entitled to exercise the rights represented by this
Warrant, or to the transfer hereof on the books of the Company any notice to the
contrary notwithstanding; but until such transfer on such books, the Company may
treat the registered owner hereof as the owner for all purposes.

         10.      [INTENTIONALLY OMITTED.]

         11.      RIGHTS AND OBLIGATIONS SURVIVE EXERCISE OF WARRANT. The rights
and obligations of the Company, of the Holder and of the holder of shares of
Common Stock issued upon exercise of this Warrant, shall survive the exercise of
this Warrant.

         12.      COMPLETE AGREEMENT, MODIFICATION AND WAIVER. This Warrant and
any documents referred to herein or executed contemporaneously herewith
constitute the parties' entire agreement with respect to the subject matter
hereof and supersede all agreements, representations, warranties, statements,
promises and understandings, whether oral or written, with respect to the
subject matter hereof. This Warrant and any provision hereof may be changed,
waived, discharged or terminated only by an instrument in writing signed by the
party against which enforcement of the same is sought.

         13.      ADDITIONAL DOCUMENTS. Each party hereto agrees to execute any
and all further documents and writings and to perform such other actions which
may be or become necessary or expedient to effectuate and carry out this
Warrant.

         14.      NOTICES. All notices, requests and approvals required by this
Warrant (i) shall be in writing, (ii) shall be addressed to the parties as
indicated below unless notified in writing of a change in address and (iii)
shall be deemed to have been given, made and received only (a) upon delivery, if
personally delivered to a party, (b) one business day after the date of
dispatch, if by facsimile transfer, (c) one business day after deposit, if
delivered by a nationally recognized courier service offering guaranteed
overnight delivery, (d) three business days after deposit in the U.S. First
Class Mail, or certified mail, postage prepaid, at the addresses appearing below
or (e) one business day after electronic transmission.

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         15.      BINDING EFFECT ON SUCCESSORS. This Warrant shall be binding
upon any corporation succeeding the Company by merger, consolidation or
acquisition of all or substantially all of the Company's assets. All of the
obligations of the Company relating to the Common Stock issuable upon the
exercise of this Warrant shall survive the exercise and termination of this
Warrant. All of the covenants and agreements of the Company shall inure to the
benefit of the successors and assigns of the holder hereof.

         16.      DESCRIPTIVE HEADINGS AND GOVERNING LAW. The description
headings of the several sections and paragraphs of this Warrant are inserted for
convenience only and do not constitute a part of this Warrant. This Warrant
shall be construed and enforced in accordance with, and the rights of the
parties shall be governed by, the laws of the State of Delaware.

         17.      LOST WARRANTS. The Company represents and warrants to the
Holder hereof that upon receipt of evidence reasonably satisfactory to the
Company of the loss, theft, destruction, or mutilation of this Warrant and, in
the case of any such loss, theft or destruction, upon receipt of an indemnity
reasonably satisfactory to the Company, or in the case of any such mutilation
upon surrender and cancellation of such Warrant, the Company, at its expense,
will make and deliver a new Warrant, of like tenor, in lieu of the lost, stolen,
destroyed or mutilated Warrant.

         18.      FRACTIONAL SHARES. No fractional shares shall be issued upon
exercise of this Warrant. The Company shall, in lieu of issuing any fractional
share, pay the holder entitled to such fraction a sum in cash equal to such
fraction multiplied by the then effective Stock Purchase Price. However, the
fractional amount shall be used in calculating any future adjustments pursuant
to Section 3 hereof. The Company shall, in the case of the final exercise under
this Warrant, make a cash payment for any fractional shares based on the closing
price on the date of exercise of a share of Common Stock on the principal
exchange or system on which the Common Stock is then listed or traded, or, if
not then listed or traded on such exchange or system, the mean of the closing
bid and asked prices on an automated quotation system, or, if such quotations
are not available, such value as may be determined in good faith by the
Company's Board of Directors, which determination shall be conclusively binding
on the parties. Notwithstanding any changes in the Stock Purchase Price or the
number of shares issuable upon exercise of this Warrant, this Warrant, and any
Warrants issued in replacement or upon transfer thereof, may continue to state
the initial Stock Purchase Price and the initial number of shares issuable upon
exercise of this Warrant. Alternatively, the Company may elect to issue a new
Warrant or Warrants of like tenor for the additional shares of Common Stock
purchasable hereunder or, upon surrender of the existing Warrant, to issue a
replacement Warrant evidencing all the shares to which the Holder is entitled
after such adjustments.

         19.      SEVERABILITY. The validity, legality or enforceability of the
remainder of this Warrant shall not be affected even if one or more of its
provisions shall be held to be invalid, illegal or unenforceable in any respect.

         20.      ATTORNEYS' FEES. Should any litigation or arbitration be
commenced (including any proceedings in a bankruptcy court) between the parties
hereto or their representatives concerning any provision of this Warrant or the
rights and duties of any person or entity

                                      -11-
<PAGE>

hereunder, the party or parties prevailing in such proceeding shall be entitled,
in addition to such other relief as may be granted, to the attorneys' fees and
court costs incurred by reason of such litigation or arbitration.

                      [THIS SPACE INTENTIONALLY LEFT BLANK]

                                      -12-
<PAGE>
         IN WITNESS WHEREOF, the Company has caused this Warrant to be duly
executed by its officers, thereunto duly authorized this 8th day of June, 2000.

                                      FVC.COM, INC.
                                      a Delaware corporation

                                      By:    /s/ Richard Beyer
                                         -------------------------------------
                                         President and Chief Executive Officer

ATTEST:

/s/ Truman Cole
------------------------------------
Assistant Secretary

                                      -13-
<PAGE>

                                    EXHIBIT A

                                SUBSCRIPTION FORM

                                                   Date: _________________, 2000

FVC.COM, INC.
3393 OCTAVIUS DRIVE, SUITE 102
SANTA CLARA, CA 95054

Attn:  President

Ladies and Gentlemen:

         The undersigned hereby elects to exercise the warrant issued to it by
FVC.COM, Inc. (the "COMPANY") and dated June 8, 2000, Warrant No. CSW-7 (the
"WARRANT") and to purchase thereunder __________________________________ shares
of the Common Stock of the Company (the "SHARES") at a purchase price of
___________________________________________ Dollars ($__________) per Share or
an aggregate purchase price of __________________________________ Dollars
($__________) (the "PURCHASE PRICE").

         Pursuant to the terms of the Warrant the undersigned has delivered the
Stock Purchase Price herewith in full in cash or by certified check or wire
transfer.

                                        Very truly yours,

                                        _______________________________________

                                        By:____________________________________

                                        Title:_________________________________

                                      -14-<PAGE>
                                                                  EXHIBIT 10.6

                          REGISTRATION RIGHTS AGREEMENT
                          -----------------------------

         THIS REGISTRATION RIGHTS AGREEMENT (the "AGREEMENT") is entered into
this 8th day of June, 2000, by and among FVC.COM, INC., a Delaware
corporation (the "COMPANY"), and VULCAN VENTURES INCORPORATED, a Washington
corporation ("VULCAN").

         A. Concurrently with the execution of this Agreement, Vulcan is
purchasing 27,437 shares of the Company's Series A Convertible Preferred
Stock, $.001 par value (the "SERIES A PREFERRED STOCK"), convertible into
shares of the Company's Common Stock, $.001 par value (the "COMMON STOCK"),
pursuant to that certain Stock Purchase Agreement dated June 8, 2000, between
the Company and Vulcan (the "STOCK PURCHASE AGREEMENT"). Pursuant to the
Stock Purchase Agreement, the Company is also issuing to Vulcan a warrant
(the "VULCAN WARRANT") to purchase additional shares of the Company's Common
Stock. Capitalized terms used herein but not defined shall have the meanings
set forth for such terms in the Stock Purchase Agreement.

         B. The parties hereto desire to set forth the respective rights of
the Company and Vulcan with respect to the registration of the shares of the
Company's Common Stock that Vulcan may acquire.

         NOW, THEREFORE, in consideration of the foregoing recitals and the
mutual promises contained herein, the parties hereto agree as follows:

         1.   DEFINITIONS.

              1.1 As used in this Agreement, the following capitalized terms
shall have the following meanings:

              AFFILIATE: A Person that directly, or indirectly through one or
more intermediaries, controls or is controlled by, or is under common control
with, Vulcan; provided that such control relationship involves direct or
indirect ownership of at least a majority of the outstanding voting interests
of the applicable Person. Without limiting the generality of the foregoing,
it is understood that any entity that is majority owned (directly or
indirectly) by a Person that directly or indirectly owns a majority of the
outstanding voting interests of Vulcan shall be an Affiliate of Vulcan.

              EXCHANGE ACT: The Securities Exchange Act of 1934, as amended
from time to time.

              FORM S-3 means such form under the Securities Act as in effect
on the date hereof or any successor registration form under the Securities
Act subsequently adopted by the SEC which permits inclusion or incorporation
of substantial information by reference to other documents filed by the
Company with the SEC.

              HOLDERS: Vulcan, all of its Affiliates (including without
limitation Paul G. Allen), any Person to which Registrable Securities are
transferred by Vulcan and its Affiliates for purposes of Paul G. Allen's
estate planning, and any Person to whom

<PAGE>

Registrable Securities are transferred by Vulcan and its Affiliates that has
registration rights pursuant to Section 10 below.

              MAJORITY HOLDERS: Holders of a majority of the Registrable
Securities held by all Holders at the time of any request for registration
pursuant to Section 2.1(a).

              PERSON: An individual, corporation, partnership, limited
liability company, trust, unincorporated organization or a government or any
agency or political subdivision thereof.

              PROSPECTUS: The definitive prospectus included in any
Registration Statement, as amended or supplemented by any prospectus
supplement with respect to the terms of the offering of any portion of the
Registrable Securities covered by the Registration Statement and by all other
amendments and supplements to the prospectus, including post-effective
amendments and all material incorporated by reference in such prospectus.

              REGISTRABLE SECURITIES: Those shares of Common Stock now or
hereafter owned of record or beneficially by the Holders (including, without
limitation, any shares of Common Stock acquired by the Holders upon
conversion of the Series A Preferred Stock or upon exercise of the Vulcan
Warrant) plus any shares received with respect to or in replacement of such
shares by reason of splits, dividends and recapitalizations and other changes
in the Company's capital structure, but excluding any shares which may be
then immediately sold to the public without registration pursuant to Rule 144
under the Securities Act.

              REGISTRATION EXPENSES:  See Section 6 hereof.

              REGISTRATION STATEMENT: Any registration statement of the
Company filed under the Securities Act which covers Registrable Securities
pursuant to the provisions of this Agreement, including the Prospectus,
amendments and supplements to such Registration Statement, including
post-effective amendments, all exhibits and all material incorporated by
reference in such Registration Statement.

              SEC:  The Securities and Exchange Commission.

              SECURITIES ACT:  The Securities Act of 1933, as amended from
time to time.

              SELLING HOLDERS:  Holders of Registrable Securities who seek to
sell such securities under any Registration Statement.

         2.   REGISTRATION RIGHTS.

              2.1      REGISTRATION UPON REQUEST.

                   (a) At any time beginning on the later of the date that is
180 days after the date hereof, the Majority Holders may request by written
notice (a "DEMAND NOTICE") to the Company that the Company effect the
registration under the Securities Act of a number of Registrable Securities
at least equal to 5% of the shares of the Common Stock then outstanding,
stating the intended method of disposition of such shares. The

                                      -2-

<PAGE>

registration rights contemplated by this Section 2.1 may be exercised only
three (3) times by the Majority Holders during the term of this Agreement;
PROVIDED, HOWEVER, the request for registration shall not be deemed made if
either (i) the Registration Statement does not become effective under the
Securities Act (including without limitation if the Selling Holders withdraw
the Registration Statement, provided in case of such withdrawal the request
for registration will be deemed made by the Majority Holders unless the
Selling Holders reimburse the Company for its reasonable expenses in
connection with such Registration Statement) or a stop order, injunction or
other order interferes or prevents the contemplated method of distribution or
(ii) the number of Registrable Securities requested to be included in the
registration is reduced by 15% or more pursuant to Section 2.1(c); and
PROVIDED FURTHER that such a demand may not be exercised more than once in
any twelve-month period (subject to the same exception set forth in the
previous proviso). Within five (5) business days after receipt of a Demand
Notice, the Company shall notify all other Holders and offer to them the
opportunity to include their Registrable Securities in such registration.

                   (b) Upon receipt of such request, the Company shall, as
soon as practicable, prepare and file a Registration Statement with the SEC
on an appropriate form under the Securities Act with respect to all of the
Registrable Securities that Holders of such securities have requested that
the Company register, and use its commercially reasonable efforts to cause
such Registration Statement to become effective.

                   (c) In connection with any Registration Statement filed in
response to such request, the Company, at its option, may include a primary
offering of additional shares of Common Stock and/or may include shares to be
sold by other stockholders of the Company; PROVIDED, HOWEVER, that if the
managing underwriter of such offering reasonably determines in good faith and
delivers to the Selling Holders a written opinion that the number of shares
otherwise to be included in the Registration Statement is such that the
success of the underwritten offering would be materially and adversely
affected and, accordingly, the total number of shares to be included in the
Registration Statement is reduced to the amount recommended by such
underwriter, then (i) unless the Registration Statement includes all of the
Registrable Securities designated for sale by all Selling Holders
participating in the demand registration pursuant to Section 2.1(a), the
Registration Statement shall not include any shares to be offered by the
Company or sold by other stockholders (including other Holders exercising
incidental registration rights pursuant to Section 2.2), and (ii) if the
Registration Statement does not include all of the Registrable Securities
designated for sale by such Selling Holders, the number of Registrable
Securities included in the Registration Statement shall be allocated among
such Selling Holders pro rata (based on the number of Registrable Securities
held by each).

                   (d) Notwithstanding the foregoing, upon delivery of
written notice (deliverable no later than 10 days after delivery of the
Demand Notice) to the person(s) who delivered the Demand Notice, the Company
shall be entitled to postpone filing of the Registration Statement, and may
withhold efforts to cause the Registration Statement to become effective, for
a reasonable period of time (not to exceed the shorter of 90 days or the
Company's termination of consideration of a Company Offering (as defined
below) or completion of any Transaction (as defined below), as the case may
be) if (i) the Company is

                                      -3-

<PAGE>

contemplating filing a registration statement in connection with the offering
of its securities (a "COMPANY OFFERING") within 90 days of delivery of the
Demand Notice, or (ii) the Company determines in good faith that a
registration pursuant to the Demand Notice might interfere with or adversely
affect the negotiations or completion of any transaction that is being
contemplated by the Company at the time the right to delay is exercised (a
"TRANSACTION"); PROVIDED, HOWEVER, that such deferral may not be utilized
more than once in any twelve (12) month period.

              2.2  INCIDENTAL REGISTRATION.

                   (a) If at any time after the date hereof the Company
proposes to register any shares of Common Stock under the Securities Act
(except pursuant to a registration statement (i) on Form S-8, Form S-4 or
comparable forms, or (ii) with respect to an employee benefit plan, or (iii)
solely in connection with a Rule 145 transaction under the Securities Act),
or if any other stockholder is being afforded an opportunity to register
shares of Common Stock (including pursuant to Section 2.1(a)), the Company
will at each such time give written notice to the Holders (other than Holders
participating in a demand registration pursuant to Section 2.1(a)) as
provided in Section 11.4 hereof of its intention to do so. Within twenty (20)
days after receipt of such notice, such Holders may request that the Company
register all or part of the Registrable Securities, stating in such request
the intended method of distribution of such securities (the "DESIGNATED
SECURITIES"). Upon receipt of such request, the Company shall use its
commercially reasonable efforts to effect the registration of the Designated
Securities by including the Designated Securities in such Registration
Statement.

                   (b) In the event that securities of the same class as the
Registrable Securities are being registered by the Company in such
Registration Statement and such securities as well as any of the Designated
Securities are to be distributed in an underwritten offering, such Designated
Securities shall be included in such underwritten offering on the same terms
and conditions as the securities being issued by the Company for distribution
pursuant to such underwritten offering; PROVIDED, HOWEVER, that if the
managing underwriter of such underwritten offering reasonably determines in
good faith and advises the parties that the inclusion in such underwritten
offering of all the Designated Securities would materially and adversely
affect the success of the underwritten offering, then the number of
Designated Securities to be included in the Registration Statement shall be
reduced to the amount recommended in good faith by and set forth in the
opinion of such managing underwriter; PROVIDED, FURTHER, that as to the
Selling Holders exercising incidental registration rights pursuant to this
Section 2.2, such reduction shall be pro rata (based on the number of shares
held by each) with respect to the Designated Securities with other Persons
holding contractual incidental or "piggy-back" registration rights in such
underwritten offering.

                   (c) No registration effected under this Section 2.2 shall
relieve the Company of its obligations to effect registrations at the request
of the Holders under Section 2.1.

              2.3  FORM S-3 REGISTRATION. In case the Company shall receive
from any Holder or Holders a written request or requests that the Company
effect a registration on

                                      -4-

<PAGE>

Form S-3 and any related qualification or compliance with respect to all or a
part of the Registrable Securities owned by such Holder or Holders, the
Company will:

              (a)promptly give written notice of the proposed registration,
and any related qualification or compliance, to all other Holders; and

              (b)as soon as practicable, use all commercially reasonable
efforts to effect such registration and all such qualifications and
compliances as may be so requested and as would permit or facilitate the sale
and distribution of all or such portion of such Holder's or Holders'
Registrable Securities as are specified in such request, together with all or
such portion of the Registrable Securities of any other Holder or Holders
joining in such request as are specified in a written request given within
twenty (20) days after receipt of such written notice from the Company;
PROVIDED, HOWEVER, that the Company shall not be obligated to take any action
to effect any such registration, qualification or compliance pursuant to this
Section 2.3:

              (i) If the Company is not qualified as a registrant entitled to
use Form S-3;

              (ii) If the Holders, together with the holders of any other
securities of the Company entitled to inclusion in such registration, propose
to sell Registrable Securities and such other securities (if any) at an
aggregate price to the public of less than $2,500,000;

              (iii) For the reasons, and under the circumstances described,
in Section 2.1(d), in which event the Company shall have the right to defer
the filing of the Form S-3 registration statement for a period of not more
than 90 days after receipt of the request of the Holder or Holders under this
Section 2.3; PROVIDED, HOWEVER, that such deferral may not be utilized more
than once in any twelve (12) month period;

              (iv) If the Company has, within the six (6) month period
preceding the date of such request, previously effected a registration
pursuant to Section 2.1 or on Form S-3 pursuant to this Section 2.3; or

              (v) Within 180 days after the effective date of any
registration statement filed by the Company in connection with a registered
public offering of the Company's securities solely for cash, other than a
registration (i) on Form S-8, S-4 or comparable forms, or (ii) with respect
to an employee benefit plan, or (iii) solely in connection with a Rule 145
transaction under the Securities Act.

         3.   HOLD-BACK AGREEMENTS.

              3.1 RESTRICTIONS ON PUBLIC SALE BY HOLDERS. Each Selling Holder
whose Registrable Securities are covered by a Registration Statement filed
pursuant to Section 2 hereof agrees, if requested by the managing
underwriters in an underwritten offering, not to effect any public sale or
distribution of securities of the Company of the same class as the securities
included in such Registration Statement during a period, not to exceed 90
days, beginning on the closing date of each underwritten offering made
pursuant to such

                                      -5-

<PAGE>

Registration Statement, to the extent timely notified in writing by the
managing underwriters.

              3.2 RESTRICTIONS ON PUBLIC SALE BY THE COMPANY AND OTHERS. The
Company agrees not to effect any public sale or distribution of its Common
Stock, during a period, not to exceed 45 days, beginning on the closing date
of an underwritten offering made pursuant to a Registration Statement filed
under Section 2 hereof to the extent timely notified in writing by the
managing underwriters (except as part of such underwritten registration or
pursuant to registrations on Forms S-4 or S-8 or any successor form to such
Forms).

         4.   REGISTRATION PROCEDURES. In connection with the Company's
registration obligations pursuant to Section 2 hereof, the Company will use
its commercially reasonable efforts to effect such registration to permit the
sale of such Registrable Securities in accordance with the intended method or
methods of disposition thereof, and pursuant thereto the Company will:

              4.1 PREPARATION OF REGISTRATION STATEMENT. Prepare and file
with the SEC, within the time periods specified in Section 2, a Registration
Statement on such form as may be appropriate under the Securities Act, and
use its best efforts to cause such Registration Statement to become effective.

              4.2 MAINTAINING EFFECTIVENESS. Promptly prepare and file with
the SEC such amendments to the Registration Statement as may be necessary to
keep such Registration Statement effective for a period of not more than 180
days (or, in the case of an underwritten offering, no more than five (5)
business days), or such shorter period which will terminate when all
Registrable Securities covered by such Registration Statement have been sold.

              4.3 NOTIFICATION. Immediately notify the Selling Holders and
the managing underwriters, if any, and (if requested by any such Person)
confirm such advice in writing, (i) when a Prospectus or any Prospectus
supplement or post-effective amendment has been filed, and, with respect to a
Registration Statement or any post-effective amendment, when the same has
become effective, (ii) of the issuance by the SEC of any stop order
suspending the effectiveness of the Registration Statement or the initiation
of any proceeding for that purpose, (iii) of the receipt by the Company of
any notification with respect to the suspension of the qualification of any
of the Registrable Securities for sale in any jurisdiction or the initiation
or threatening of any proceeding for such purpose, and (iv) of the happening
of any event which makes any statement made in the Registration Statement,
the Prospectus or any document incorporated therein by reference untrue or
which requires the making of any changes in the Registration Statement, the
Prospectus, or any document incorporated therein by reference so that they
will not contain any untrue statement of a material fact or omit to state any
material fact required to be stated therein or necessary to make the
statement therein not misleading.

              4.4 STOP ORDERS. Make every reasonable effort to obtain the
withdrawal of any order suspending the effectiveness of a Registration
Statement or the qualification of any Registrable Securities for sale in any
jurisdiction at the earliest possible moment.

                                      -6-

<PAGE>

              4.5 CONSULTATION WITH HOLDERS. Prior to the filing of any
Registration Statement or amendment thereto, provide copies of such document
to the Selling Holders and to the managing underwriters, if any, make the
Company's representatives and the Company's counsel available for discussion
of such document and make such changes in such document relating to the
Selling Holders prior to the filing thereof as such Selling Holders, counsel
for such Selling Holders, or underwriters may reasonably request.

              4.6 COPIES OF REGISTRATION STATEMENTS. Furnish to each Selling
Holder and each managing underwriter, if any, without charge, at least one
originally executed copy of the Registration Statement and any post-effective
amendment thereto, including financial statements and schedules, all
documents incorporated therein by reference and all exhibits (including those
incorporated by reference).

              4.7 PROSPECTUSES. Deliver to each Selling Holder and the
underwriters, if any, without charge, as many copies of the Prospectus (and
each preliminary prospectus) and any amendment or supplement thereto as such
Persons may reasonably request so long as the Registration Statement to which
such Prospectus or any amendment or supplement thereto relates is effective.

              4.8 BLUE SKY LAWS. Prior to any public offering of Registrable
Securities, use its commercially reasonable efforts to register or qualify or
cooperate with the Selling Holders, the underwriters, if any, and their
respective counsel in connection with the registration or qualification of
such Registrable Securities for offer and sale under the securities or blue
sky laws of such jurisdictions within the United States as any Selling Holder
or underwriter reasonably requests, and do any and all other acts or things
necessary or advisable to enable the disposition in such jurisdictions of the
Registrable Securities covered by the Registration Statement; PROVIDED,
HOWEVER, that the Company will not be required to qualify generally to do
business in any jurisdiction where it is not then so qualified or to take any
action which would subject it to general service of process or taxation in
any such jurisdiction where it is not then so subject.

              4.9 AMENDMENTS UPON CHANGES. Upon the occurrence of any event
contemplated by Sections 4.3(ii), (iii) or (iv) or 4.4 above, prepare, as
promptly as practicable, a supplement or post-effective amendment to the
Registration Statement or related Prospectus or any document incorporated
therein by reference, or file any other required document so that, as
thereafter delivered to the purchasers of the Registrable Securities being
sold thereunder, such Prospectus will not contain an untrue statement of a
material fact or omit to state any material fact necessary to make the
statements therein not misleading.

              4.10 UNDERWRITING AGREEMENTS. Enter into such customary
agreements (including an underwriting agreement) and take all such other
actions reasonably required in connection therewith in order to expedite or
facilitate the disposition of such Registrable Securities.

              4.11 COMPLIANCE WITH LAWS; SECTION 11(a). Otherwise use its
best efforts to comply with all applicable federal and state securities laws
(including without limitation the rules and regulations of the SEC), and make
generally available to its security holders

                                      -7-

<PAGE>

earning statements satisfying the provisions of Section 11(a) of the
Securities Act no later than 45 days after the end of each 12-month period
(or within 90 days after the end of a fiscal year).

              4.12 OPINIONS. At the request of any Selling Holder, use its
commercially reasonable efforts to furnish on the date that the Registrable
Securities are delivered to that Holder and any underwriter for sale in
connection with a registration pursuant to this Agreement (i) an opinion of
the counsel representing the Company for the purposes of such registration,
and (ii) a letter from the independent certified public accountants of the
Company, each dated such date and in form and substance as is customarily
given by counsel and independent certified public accountants to underwriters
in an underwritten public offering, addressed to any Selling Holders'
underwriter and to the Selling Holders.

         5.   SELLING HOLDERS' OBLIGATIONS.

              5.1 PROVISION OF INFORMATION. The Company may require each
Selling Holder of Registrable Securities as to which any registration is
being effected to furnish to the Company such information regarding the
distribution of such securities by, and such other information relevant to,
the Selling Holder for inclusion in such Registration Statement, as the
Company may from time to time reasonably request in writing.

              5.2 DISCONTINUED USE OF PROSPECTUS. Each Holder of Registrable
Securities agrees by execution of this Agreement that, upon receipt of any
written notice from the Company of the happening of any event of the kind
described in clauses (ii), (iii) or (iv) of Section 4.3 or Section 4.4
hereof, such Holder will forthwith discontinue disposition of Registrable
Securities until such Holder's receipt of the copies of the supplemented or
amended Prospectus contemplated by Section 4.9 hereof, or until it is advised
in writing (the "ADVICE") by the Company that the use of the Prospectus may
be resumed, and has received copies of any additional or supplemental filings
which are incorporated by reference in such Prospectus, and, if so directed
by the Company such Holder will deliver to the Company (at the Company's
expense) all copies, other than permanent file copies then in such Holder's
possession, of the Prospectus covering such Registrable Securities current at
the time of receipt of such notice. In the event the Company shall give any
such notice, the time period mentioned in Section 4.2 hereof shall be
extended by the number of days during the period from and including the date
of the giving of such notice to and including the date when each Selling
Holder shall have received the copies of the supplemental or amended
Prospectus contemplated by Section 4.9 hereof or the Advice.

              5.3 UNDERWRITING AGREEMENT. Each Selling Holder participating
in an underwritten offering pursuant to Section 2.1 or 2.2 will enter into a
customary underwriting agreement on terms reasonably satisfactory to the
managing underwriter.

                                      -8-

<PAGE>

         6.     REGISTRATION EXPENSES. The Company shall bear all expenses
other than Selling Holder Expenses (defined below) incurred in connection
with any Registration Statement, including without limitation all
registration and filing fees, fees with respect to any filings required to be
made with the National Association of Securities Dealers, listing fees
relative to any stock exchange or national market system, fees and expenses
of compliance with state securities or blue sky laws (including reasonable
fees and expenses of counsel for the underwriters in connection therewith),
printing expenses, fees and disbursements of counsel for the Company, and
fees and disbursements of all independent public accountants of the Company.
Each Selling Holder shall bear his or its pro rata share of any Selling
Holder Expenses. "SELLING HOLDER EXPENSES" shall consist of and be limited to
(i) the Selling Holder's legal costs, including the fees and expenses of any
counsel selected by the Selling Holder to represent him or it, and (ii) the
proportionate share of brokerage or underwriting commissions attributable to
the Selling Holder's shares.

         7.   INDEMNIFICATION.

              7.1 INDEMNIFICATION BY THE COMPANY. The Company agrees to
indemnify and hold harmless, to the full extent permitted by law, each Holder
of Registrable Securities, each Person who controls such Holder (within the
meaning of the Securities Act or the Exchange Act) (a "CONTROLLING PERSON"),
and each officer, director, employee and agent of such Holder and each
controlling person and each underwriter or selling agent (the "INDEMNIFIED
PARTIES") from and against all losses, claims, damages, liabilities and
expenses caused by any untrue or alleged untrue statement of a material fact
contained in any Registration Statement, Prospectus or preliminary prospectus
or any amendment or supplement thereto 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, except insofar as (i) the Company
has demonstrated that the same are caused by or contained in any information
furnished to the Company by such Holder, expressly for use therein, or (ii)
the Company has advised such Holders' Representative in writing of a Section
4.3(iv) event and the Holder has sold Registrable Securities notwithstanding
receipt of such notice prior to receipt of a supplement or amended Prospectus
pursuant to Section 4.9 herein; PROVIDED, HOWEVER, that the Company shall not
be liable in any such case to the extent that any such loss, claim, damage,
liability or expense arises out of or is based upon an untrue statement or
alleged untrue statement or omission or alleged omission made in any
preliminary prospectus if (i) such Holder failed to send or deliver a copy of
the Prospectus with or prior to the delivery of written confirmation of the
sale of Registrable Securities and (ii) the Prospectus would have corrected
such untrue statement or omission; PROVIDED, FURTHER, that the Company shall
not be liable in any such case to the extent that any such loss, claim,
damage, liability or expense arises out of or is based upon an untrue
statement or alleged untrue statement or omission or alleged omission in the
Prospectus, if such untrue statement or alleged untrue statement, omission or
alleged omission is corrected in an amendment or supplement to the Prospectus
and if, having previously been furnished by or on behalf of the Company with
copies of the Prospectus as so amended or supplemented, such Holder
thereafter fails to deliver such Prospectus as so amended or supplemented,
prior to or concurrently with the sale of a Registrable Security to the
Person asserting such loss, claim, damage, liability or expense who purchased
such Registrable Security which is the subject thereof from such Holder. The
indemnity provided herein shall remain in full force

                                      -9-

<PAGE>

and effect regardless of any investigation made by or on behalf of an
indemnified party and shall survive the transfer of Registrable Securities by
the Selling Holder.

              7.2 INDEMNIFICATION BY HOLDERS. In connection with the
Registration Statements hereunder, each Selling Holder agrees to indemnify
and hold harmless, to the full extent permitted by law, the Company, and each
Person who controls the Company (within the meaning of the Securities Act or
the Exchange Act) and each director, officer, employee and agent of each such
Person from and against any losses, claims, damages, liabilities and expenses
caused by any untrue statement of a material fact or any omission of a
material fact required to be stated in any Registration Statement or
Prospectus or preliminary prospectus or necessary to make the statements
therein not misleading, to the extent, but only to the extent, that the
Company has demonstrated that such untrue statement or omission is contained
in any information or affidavit so furnished by such Holder to the Company
specifically for inclusion in such Registration Statement or Prospectus. In
no event, however, shall the liability of any Selling Holder hereunder be
greater in amount than the dollar amount of the proceeds (net of
underwriters' discounts and commissions) received by such Holder upon the
sale of the Registrable Securities giving rise to such indemnification
obligation. The Company shall be obligated to give to, and shall be entitled
to receive from, underwriters, selling brokers, dealer managers and similar
securities industry professionals participating in the distribution customary
indemnities.

              7.3 CONDUCT OF INDEMNIFICATION PROCEEDINGS. Any Person entitled
to indemnification hereunder will (i) give prompt notice to the indemnifying
party of any claim with respect to which it seeks indemnification and (ii)
permit such indemnifying party to assume the defense of such claim with
counsel reasonably satisfactory to the indemnified party; PROVIDED, HOWEVER,
that any person entitled to indemnification hereunder shall have the right to
employ separate counsel and to participate in the defense of such claim, but
the fees and expenses of such counsel shall be at the expense of such Person
unless (a) the indemnifying party has agreed to pay such fees or expenses, or
(b) the indemnifying party shall have failed to assume within a reasonable
period of time the defense of such claim and employ counsel reasonably
satisfactory to such person or (c) in the reasonable judgment of any such
Person, based upon written advice of its counsel, a conflict of interest may
exist between such Person and the indemnifying party with respect to such
claims or such Person may have separate or additional defenses (in which
case, if the Person notifies the indemnifying party in writing that such
Person elects to employ separate counsel at the expense of the indemnifying
party, the indemnifying party shall not have the right to assume the defense
of such claim on behalf of such Person). If such defense is not assumed by
the indemnifying party, the indemnifying party will not be subject to any
liability for any settlement made without its consent (but such consent will
not be unreasonably withheld). No indemnifying party will consent to entry of
any judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
indemnified party of a release from all liability in respect to such claim or
litigation. An indemnifying party who is not entitled to, or elects not to,
assume the defense of a claim will not be obligated to pay the fees and
expenses of more than one principal and one local counsel for all parties
indemnified by such indemnifying party with respect to such claim.

                                      -10-

<PAGE>

              7.4 CONTRIBUTION. If the indemnification provided for in
Sections 7.1 or 7.2 is unavailable to the indemnified parties in respect of
any losses, claims, damages or liabilities referred to herein, then each such
indemnifying party, in lieu of indemnifying such indemnified party, shall
contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages or liabilities (i) as between the
Company and the Selling Holders on the one hand and the underwriters on the
other hand, in such proportion as is appropriate to reflect the relative
benefits received by the Company and the Selling Holders on the one hand and
the underwriters on the other hand from the offering of all of the securities
sold in the offering, or if such allocation is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative
benefits but also the relative fault of the Company and the Selling Holders
on the one hand and of the underwriters on the other hand in connection with
the statements or omissions which resulted in such losses, claims, damages or
liabilities, as well as any other relevant equitable considerations and (ii)
as between the Company on the one hand and each Selling Holder on the other
hand, in such proportion as is appropriate to reflect the relative fault of
the Company and of each Selling Holder in connection with such statements or
omissions, as well as any other relevant equitable considerations. The
relative benefits received by the Company and the Selling Holders on the one
hand and the underwriters on the other hand shall be deemed to be in the same
proportion as the total proceeds from the offering (net of underwriting
discounts and commissions but before deducting expenses) received by the
Company and the Selling Holders bear to the total underwriting discounts and
commissions received by the underwriters, in each case as set forth in the
table on the cover page of the Prospectus. The relative fault of the Company
and the Selling Holders on the one hand and of the underwriters on the other
hand shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
the Company and the Selling Holders or by the underwriters. The relative
fault of the Company on the one hand and of each Selling Holder on the other
hand shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
such party, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.

         The Company and the Selling Holders agree that it would not be just
and equitable if contribution pursuant to this Section 7.4 were 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
account of the equitable considerations referred to in the immediately
preceding paragraph. The amount paid or payable by an indemnified party as a
result of the losses, claims, damages or liabilities referred to in the
immediately preceding paragraph shall be deemed to include, subject to the
limitations set forth above, 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 7.4, no
underwriter shall be required to contribute any amount in excess of the
amount by which the total price at which the Common 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 been required to pay by
reason of such untrue or alleged untrue statement or omission or alleged
omission, and no Selling Holder shall be required to

                                      -11-

<PAGE>

contribute any amount in excess of the amount by which the total price at
which the securities of such Selling Holder were offered to the public
exceeds the amount of any damages which such Selling Holder has otherwise
been required to pay by reason of such untrue or alleged untrue statement or
omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation. The Selling Holders' obligations to contribute
pursuant to this Section 7.4 are several in proportion to the proceeds of the
offering received by each Selling Holder bears to the total proceeds of the
offering received by all the Selling Holders and not joint.

         8.     SELECTION OF UNDERWRITERS. In connection with any request for
registration under Section 2.1 hereof, the Company shall be entitled to
select the managing underwriter if it is also registering shares on its own
behalf. The Selling Holders, however, shall be entitled to select the
co-managing underwriter. If the Registration Statement covers only shares
being sold by the Selling Holders, then the Selling Holders shall be entitled
to select the managing underwriter, subject to approval by the Company, which
approval shall not be unreasonably withheld. In connection with any
registration under Section 2.2, the Selling Holders shall have no right to
select underwriters.

         9.     RULE 144 The Company covenants that it will timely file the
reports required to be filed by it under the Securities Act and the Exchange
Act and the rules and regulations adopted by the SEC thereunder, and it will
take such further action as may be reasonably and customarily requested by
any Holder of Registrable Securities, all to the extent required from time to
time to enable such Holder to sell Registrable Securities without
registration under the Securities Act within the limitation of the exemptions
provided by (a) Rule 144 under the Securities Act, as such Rule may be
amended from time to time, or (b) any similar rule or regulation hereafter
adopted by the SEC. The Company also agrees that it will take commercially
reasonable efforts to enable the Holders to utilize Form S-3 for the sale of
their Registrable Securities. Upon the request of any Holder of Registrable
Securities, the Company will deliver to such Holder a written statement as to
whether it has complied with such information and requirements and such other
information as may be reasonably requested in availing any Holder of any rule
or regulation of the SEC or any state securities authorities which permits
the selling of any such securities without registration or pursuant to such
form.

                                      -12-

<PAGE>

         10.  TRANSFER OF REGISTRATION RIGHTS. The registration rights
granted pursuant to this Agreement shall be available to a transferee of any
Registrable Securities if (i) the transferring Holder gives the Company
written notice of such transfer, identifying the name and address of the
transferee and the securities involved; (ii) the transferee agrees in writing
to be bound by the provisions of this Agreement; and (iii) (A) the transferee
is a Vulcan Affiliate, (B) as a result of such transfer, the transferee holds
at least 250,000 shares of Common Stock (assuming conversion into or exercise
for Common Stock, at the conversion rate or exercise price then in effect, if
the transfer is of Series A Preferred Stock or the Vulcan Warrant (in whole
or in part), as applicable) or (C) such transferee is a bank, insurance
company or other financial institution or any assignee of the same that has
received shares of Common Stock as a result of its foreclosure on any shares
of Series A Preferred Stock or Common Stock, that were pledged, mortgaged or
otherwise encumbered by Holder for financing purposes.

         11.  MISCELLANEOUS.

              11.1 REMEDIES. In the event of a breach by the Company of its
obligations under this Agreement, each Holder of Registrable Securities, in
addition to being entitled to exercise all rights granted by law, including
recovery of damages, will be entitled to specific performance of its rights
under this Agreement. The Company agrees that monetary damages would not be
adequate compensation for any loss incurred by reason of a breach by it of
any of the provisions of this Agreement and hereby waives the defense in any
action for specific performance that a remedy at law would be adequate.

              11.2 NO INCONSISTENT AGREEMENTS. The Company will not on or
after the date of this Agreement enter into any agreement with respect to its
securities which is inconsistent with or limits or impairs the rights granted
to the Holders in this Agreement or otherwise conflicts with the provisions
hereof.

              11.3 ADJUSTMENTS AFFECTING REGISTRABLE SECURITIES. The Company
will not take any action, or permit any change to occur, with respect to the
Registrable Securities which would adversely affect the ability of the
Holders of Registrable Securities to include such Registrable Securities in a
registration undertaken pursuant to this Agreement.

              11.4 NOTICES. All notices or other communications hereunder
shall be in writing and shall be given by (i) personal delivery, (ii) courier
or other delivery service which obtains a receipt evidencing delivery, (iii)
registered or certified mail (postage prepaid and return receipt requested),
or (iv) facsimile or similar electronic device, to such address as may be
designated from time to time by the relevant party, and which shall initially
be: (i) in the case of the Company, 3393 Octavius Drive, Suite 102, Santa
Clara, CA 95054, Attention: Chief Financial Officer, facsimile (408)
748-2241, with a copy to Cooley Godward LLP, 4365 Executive Drive, Suite
1100, San Diego, CA 92121, Attention: Julie M. Robinson, Esq.; and (ii) in
the case of Vulcan, 110 110th Avenue N.E., Suite 550, Bellevue, Washington
98004, attention: William D. Savoy, facsimile (425) 453-1985, with a copy to
Irell & Manella LLP, 1800 Avenue of the Stars, Suite 900, Los Angeles, CA
90067, Attn: Alvin G. Segel, Esq., facsimile (310) 203-7199. All notices and
other communications shall be deemed to have been given (i) if delivered by
the United States mail, three business days after mailing (five business days
if delivered to an address outside of the United

                                      -13-

<PAGE>

States), (ii) if delivered by a courier or other delivery service, one
business day after dispatch (two business days if delivered to an address
outside of the United States), and (iii) if personally delivered or sent by
facsimile or similar electronic device, upon receipt by the recipient or its
agent or employee (which, in the case of a notice sent by facsimile or
similar electronic device, shall be the time and date indicated on the
transmission confirmation receipt). No objection may be made by a party to
the manner of delivery of any notice actually received in writing by an
authorized agent of such party.

              11.5 COMPLETE AGREEMENT; MODIFICATIONS. This Agreement and any
documents referred to herein or executed contemporaneously herewith
constitute the parties' entire agreement with respect to the subject matter
hereof and supersede all agreements, representations, warranties, statements,
promises and understandings, whether oral or written, with respect to the
subject matter hereof. This Agreement may be amended, altered or modified
only by a writing signed by the Company, the Majority Holders.

              11.6 SUCCESSORS AND ASSIGNS. Except as provided herein to the
contrary, this Agreement shall be binding upon and inure to the benefit of
the parties, their respective successors and permitted assigns, including
without limitation and without the need for an express assignment, subsequent
Holders of Registrable Securities.

              11.7 GOVERNING LAW. All questions with respect to the Agreement
and the rights and liabilities of the parties shall be governed by the laws
of the State of Delaware, regardless of the choice of laws provisions of
Delaware or any other jurisdiction.

              11.8 ATTORNEYS' FEES. Should any litigation be commenced
(including any proceedings in a bankruptcy court) between the parties hereto
or their representatives concerning any provision of this Agreement or the
rights and duties of any Person or entity hereunder, the party or parties
prevailing in such proceeding shall be entitled, in addition to such other
relief as may be granted, to the reasonable attorneys' fees and court costs
incurred by reason of such litigation.

              11.9 HEADINGS. The Article and Section headings in this
Agreement are inserted only as a matter of convenience, and in no way define,
limit, extend or interpret the scope of this Agreement or of any particular
Article or Section.

              11.10 SEVERABILITY. In the event that any one or more of the
provisions contained herein, or the application thereof in any circumstances,
is held invalid, illegal or unenforceable, the validity, legality and
enforceability of any such provision in every other respect and of the
remaining provisions contained herein shall not be affected or impaired
thereby.

              11.11 GENDER. Throughout this Agreement, as the context may
require, the masculine gender includes the feminine and neuter; and the
neuter gender includes the masculine and feminine.

              11.12 COUNTERPARTS. This Agreement may be executed in any
number of counterparts and by the parties hereto in separate counterparts,
each of which when so

                                      -14-

<PAGE>

executed shall be deemed to be an original and all of which taken together
shall constitute one and the same agreement.

               [Remainder of this page intentionally left blank.]

                                      -15-

<PAGE>

                 SIGNATURE PAGE TO REGISTRATION RIGHTS AGREEMENT

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

                                       FVC.COM, INC.

                                       By:   /s/ Truman Cole
                                          ------------------------------
                                           Truman Cole
                                           Chief Financial Officer

                                       VENTURES INCORPORATED

                                       By:   /s/ William D. Savoy
                                          ------------------------------
                                           William D. Savoy
                                           President

                                      -16-

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