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                                                                   EXHIBIT 10.67

CROSS-CORPORATE CONTINUING GUARANTY

BORROWERS:       VERSO TECHNOLOGIES, INC.;
                 NACT TELECOMMUNICATIONS, INC.; AND
                 TELEMATE.NET SOFTWARE, INC.

GUARANTOR:       CLARENT CANADA LTD.

DATE:            FEBRUARY 12, 2003

THIS CROSS-CORPORATE CONTINUING GUARANTY is executed by the above-named
guarantor (the "Guarantor"), as of the above date, in favor of SILICON VALLEY
BANK ("Silicon"), whose address is 3003 Tasman Drive, Santa Clara, California
95054, with respect to the Indebtedness of the above-named borrowers
(collectively, the "Borrower").

         1.       CONTINUING GUARANTY; SECURITY AGREEMENT. Guarantor hereby,
jointly and severally (and, to the extent necessary for the purposes of Quebec
law, solidarily), unconditionally guarantees and promises to pay on demand to
Silicon in lawful money of the United States, and to perform for the benefit of
Silicon, all of Borrower's present and future Indebtedness (as defined below) to
Silicon. Guarantors' obligations hereunder are secured a Movable Hypothec of
even date (the "Security Agreement") and any and all other present and future
pledges, security agreements and hypothecs or other charges of every kind.

         2.       "INDEBTEDNESS." As used in this Guaranty, the term
"Indebtedness" is used in its most comprehensive sense and shall mean and
include without limitation: (a) any and all debts, duties, obligations,
liabilities, representations, warranties and guaranties of Borrower or any one
or more of them, heretofore, now, or hereafter made, incurred, or created,
whether directly to Silicon or acquired by Silicon by assignment or otherwise,
or held by Silicon on behalf of others, however arising, whether voluntary or
involuntary, due or not due, absolute or contingent, liquidated or unliquidated,
certain or uncertain, determined or undetermined, monetary or nonmonetary,
written or oral, and whether Borrower may be liable individually, solidarily or
jointly with others, and regardless of whether recovery thereon may be or
hereafter become barred by any statute of limitations, discharged or
uncollectible in any bankruptcy, insolvency or other proceeding, or otherwise
unenforceable; and (b) any and all amendments, modifications, renewals and
extensions of any or all of the foregoing, including without limitation
amendments, modifications, renewals and extensions which are evidenced by any
new or additional instrument, document or agreement; and (c) any and all
attorneys' fees, court costs, and collection charges incurred in endeavoring to
collect or enforce any of the foregoing against Borrower, Guarantor, or any
other person liable thereon (whether or not suit be brought) and any other
expenses of, for or incidental to collection thereof. All moneys and credits in
fact borrowed or obtained by Borrower from Silicon will be deemed to form part
of the Indebtedness notwithstanding any incapacity, disability or lack or
limitation of status or power of Borrower or of the directors, officers,
employees, partners or agents thereof, or that Borrower may not be a legal
entity, or any irregularity, defect or informality in the borrowing or obtaining
of such moneys or credits. If any amount in respect of the Indebtedness is not
recoverable from Guarantor hereunder on the basis of a guarantee, then,
notwithstanding any other provision hereof, Guarantor shall be liable hereunder
as principal obligor and shall indemnify Silicon in respect of the due payment
of such amount, and shall pay such amount to Silicon after demand as herein
provided.

         3.       WAIVERS. The obligations of Guarantor under this Guaranty are
continuing, unconditional and absolute and, without limiting the generality of
the foregoing, will not be released, discharged, diminished, limited or
otherwise affected by (and Guarantor hereby consents to or waives, as
applicable, to the fullest extent permitted by applicable law): (a) presentment
for payment, notice of dishonor, demand, protest, and notice thereof as to any
instrument, and all other notices and demands to which Guarantor might be
entitled, including without limitation notice of all of the following: the
acceptance hereof; the creation, existence, or acquisition of any Indebtedness;
the amount of the Indebtedness from time to time outstanding; any foreclosure,
taking in payment, sale or other disposition of any property which secures any
or all of the Indebtedness or which secures the obligations of any other
guarantor of any or all of the Indebtedness; any adverse change in Borrower's
financial position; any other fact which might increase Guarantor's risk; any
default, partial payment or non-payment of all or any part of the Indebtedness;
the occurrence of any other Event of Default (as hereinafter defined); any and
all agreements and arrangements between Silicon and Borrower and any changes,
modifications, or extensions thereof, and any revocation, modification or
release of any guaranty of any or all of the

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Silicon Valley Bank                          Cross-Corporate Continuing Guaranty
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Indebtedness by any person (including without limitation any other person
signing this Guaranty); (b) any right to require Silicon to institute suit
against, or to exhaust its rights and remedies against, Borrower or any other
person, or to proceed against any property of any kind which secures all or any
part of the Indebtedness, or to exercise any right of offset or compensation or
other right with respect to any reserves, credits or deposit accounts held by or
maintained with Silicon or any indebtedness of Silicon to Borrower, or to
exercise any other right or power, or pursue any other remedy Silicon may have;
(c) any defense arising by reason of any disability, incapacity, lack of
authority or other defense of Borrower or any other guarantor or any endorser,
co-maker or other person, or by reason of the cessation from any cause
whatsoever of any liability of Borrower or any other guarantor or any endorser,
co-maker or other person, with respect to all or any part of the Indebtedness,
or by reason of any act or omission of Silicon or others which directly or
indirectly results in the discharge or release of Borrower or any other
guarantor or any other person or any Indebtedness or any security therefor,
whether by operation of law or otherwise; (d) any defense arising by reason of
any failure of Silicon to obtain, perfect, register, maintain or keep in force
any security interest in, or lien, hypothec or encumbrance upon, any property of
Borrower or any other person; (e) any defense based upon any failure of Silicon
to give Guarantor notice of any sale or other disposition of any property
securing any or all of the Indebtedness, or any defects in any such notice that
may be given, or any failure of Silicon to comply with any provision of
applicable law in enforcing any security interest in or hypothec or lien upon
any property securing any or all of the Indebtedness including, but not limited
to, any failure by Silicon to dispose of any property securing any or all of the
Indebtedness in a commercially reasonable manner; (f) any defense based upon or
arising out of any bankruptcy, insolvency, reorganization, arrangement,
readjustment of debt, liquidation or dissolution proceeding commenced by or
against Borrower or any other guarantor or any endorser, co-maker or other
person, including without limitation any discharge of, or bar against
collecting, any of the Indebtedness (including without limitation any interest
thereon), in or as a result of any such proceeding; (g) the benefit of any and
all statutes of limitation or prescription with respect to any action based
upon, arising out of or related to this Guaranty; (h) any release,
non-perfection or invalidity of any direct or indirect security for any
Indebtedness; (i) any change in the existence, structure, constitution, name,
objects, powers, business, control or ownership of Borrower or any other person,
or any insolvency, bankruptcy, reorganization or other similar proceeding
affecting Borrower or any other person or their assets; (j) the existence of any
claim, set-off, compensation or other rights which Guarantor may have at any
time against Borrower, Silicon, or any other person, whether in connection
herewith or any unrelated transactions; (k) any limitation, postponement,
prohibition, subordination or other restriction on the rights of Silicon to
payment of the Indebtedness; (l) any law which provides that the obligation of a
guarantor must neither be larger in amount nor in other respects more burdensome
or onerous than that of the principal obligation or which reduces a guarantor's
obligation in proportion to the principal obligation; (m) any dealing whatsoever
with Borrower or other person or any security, whether negligently or not, or
any failure to do so; or (n) any other act or omission to act or delay of any
kind by Borrower, Silicon, or any other person or any other circumstance
whatsoever, whether similar or dissimilar to the foregoing, which might, but for
the provisions of this Section 3, constitute a legal or equitable discharge,
limitation or reduction of Guarantor's obligations hereunder (other than the
payment in full of all of the Indebtedness). The foregoing provisions apply (and
the foregoing waivers will be effective) even if the effect of any action (or
failure to take action) by Silicon is to destroy or diminish Guarantor's
subrogation rights, Guarantor's right to proceed against Borrower for
reimbursement, Guarantor's right to recover contribution from any other
guarantor or any other right or remedy. Until all of the Indebtedness has been
paid, performed, and discharged in full, nothing shall discharge or satisfy the
liability of Guarantor hereunder except the full performance and payment of all
of the Indebtedness. If any claim is ever made upon Silicon for repayment or
recovery of any amount or amounts received by Silicon in payment of or on
account of any of the Indebtedness, because of any claim that any such payment
constituted a preferential transfer or fraudulent conveyance, or for any other
reason whatsoever, and Silicon repays all or part of said amount by reason of
any judgment, decree or order of any court or administrative body having
jurisdiction over Silicon or any of its property, or by reason of any settlement
or compromise of any such claim effected by Silicon with any such claimant
(including without limitation Borrower), then and in any such event, Guarantor
agrees that any such judgment, decree, order, settlement and compromise shall be
binding upon Guarantor, notwithstanding any revocation or release of this
Guaranty or the cancellation of any note or other instrument evidencing any of
the Indebtedness, or any release of any of the Indebtedness, and Guarantor shall
be and remain liable to Silicon under this Guaranty for the amount so repaid or
recovered, to the same extent as if such amount had never originally been
received by Silicon, and the provisions of this sentence shall survive, and
continue in effect, notwithstanding any revocation or release of this Guaranty.
Until all of the Indebtedness has been irrevocably paid and performed in full,
Guarantor hereby expressly and unconditionally waives (i) all rights of
subrogation, reimbursement and indemnity of every kind against Borrower, (ii)
all rights of recourse to any assets or property of Borrower, (iii) all rights
to any collateral or security held for the payment and performance of any
Indebtedness, and (iv) for the purposes of Quebec law and to the extent
required, the benefits or rights of discussion and division, including (but not
limited to) any of the foregoing rights which Guarantor may have under any
present or future document or agreement with any Borrower or other person, and
including (but not limited to) any of the foregoing rights which Guarantor may
have under any equitable doctrine of subrogation, implied contract, or unjust
enrichment, or any other equitable or legal doctrine. Neither Silicon, nor any
of

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Silicon Valley Bank                          Cross-Corporate Continuing Guaranty
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its directors, officers, employees, agents, attorneys or any other person
affiliated with or representing Silicon shall be liable for any claims, demands,
losses or damages, of any kind whatsoever, made, claimed, incurred or suffered
by Guarantor or any other party through the ordinary negligence of Silicon, or
any of its directors, officers, employees, agents, attorneys or any other person
affiliated with or representing Silicon.

         4.       CONSENTS. Guarantor hereby consents and agrees that, without
notice to or by Guarantor and without affecting or impairing in any way the
obligations or liability of Guarantor hereunder, Silicon may, from time to time
before or after revocation of this Guaranty, do any one or more of the following
in Silicon's sole and absolute discretion: (a) accelerate, accept partial
payments of, compromise or settle, renew, extend the time for the payment,
discharge, or performance of, refuse to enforce, and release all or any parties
to, any or all of the Indebtedness or security; (b) grant any other indulgence
to Borrower or any other person in respect of any or all of the Indebtedness or
any other matter; (c) accept, release, waive, surrender, enforce, exchange,
modify, impair, or extend the time for the performance, discharge, or payment
of, any and all property of any kind securing any or all of the Indebtedness or
any guaranty of any or all of the Indebtedness, or on which Silicon at any time
may have a lien, or refuse to enforce its rights or make any compromise or
settlement or agreement therefor in respect of any or all of such property; (d)
substitute or add, or take any action or omit to take any action which results
in the release of, any one or more endorsers or guarantors of all or any part of
the Indebtedness, including, without limitation one or more parties to this
Guaranty, regardless of any destruction or impairment of any right of
contribution or other right of Guarantor; (e) amend, alter or change in any
respect whatsoever any term or provision relating to any or all of the
Indebtedness, including the rate of interest thereon; (f) apply any sums
received from Borrower, any other guarantor, endorser, or co-signer, or from the
disposition of any collateral or security, to any indebtedness whatsoever owing
from such person or secured by such collateral or security, in such manner and
order as Silicon determines in its sole discretion, and regardless of whether
such indebtedness is part of the Indebtedness, is secured, or is due and
payable; (g) apply any sums received from Guarantor or from the disposition of
any collateral or security securing the obligations of Guarantor, to any of the
Indebtedness in such manner and order as Silicon determines in its sole
discretion, regardless of whether or not such Indebtedness is secured or is due
and payable. Guarantor consents and agrees that Silicon shall be under no
obligation to marshal any assets in favor of Guarantor, or against or in payment
of any or all of the Indebtedness. Guarantor further consents and agrees that
Silicon shall have no duties or responsibilities whatsoever with respect to any
property securing any or all of the Indebtedness. Without limiting the
generality of the foregoing, Silicon shall have no obligation to monitor,
verify, audit, examine, or obtain or maintain any insurance with respect to, any
property securing any or all of the Indebtedness.

         5.       NO COMMITMENT. Guarantor acknowledges and agrees that
acceptance by Silicon of this Guaranty shall not constitute a commitment of any
kind by Silicon to extend such credit or other financial accommodation to
Borrower or to permit Borrower to incur Indebtedness to Silicon.

         6.       EXERCISE OF RIGHTS AND REMEDIES; FORECLOSURE OF TRUST DEEDS.
Guarantor hereby waives all rights of subrogation, discussion, division,
reimbursement, indemnification, and contribution and any other rights and
defenses that are or may become available to Guarantor or other surety by reason
of California Civil Code Sections 2787 to 2855, inclusive or any other
applicable law. Guarantor waives all rights and defenses that Guarantor may have
because Borrower's Indebtedness is secured by real or immovable property. This
means, among other things: (1) Silicon may collect from Guarantor without first
foreclosing on any real or personal (immovable or movable) property collateral
pledged, charged or hypothecated by Borrower. (2) If Silicon forecloses on any
real property collateral pledged, charged or hypothecated by Borrower: (A) The
amount of the Indebtedness may be reduced only by the price for which that
collateral is sold at the foreclosure sale, even if the collateral is worth more
than the sale price. (B) Silicon may collect from Guarantor even if Silicon, by
foreclosing on the real property collateral, has destroyed any right Guarantor
may have to collect from Borrower. This is an unconditional and irrevocable
waiver of any rights and defenses Guarantor may have because Borrower's
Indebtedness is secured by real property. These rights and defenses include, but
are not limited to, any rights or defenses based upon Section 580a, 580b, 580d,
or 726 of the Code of Civil Procedure. Guarantor waives all rights and defenses
arising out of an election of remedies by Silicon, even though that election of
remedies, such as a nonjudicial foreclosure with respect to security for a
guaranteed obligation, has destroyed Guarantor's rights of subrogation and
reimbursement against the principal by the operation of Section 580d of the Code
of Civil Procedure or otherwise.

         7.       ACCELERATION. Notwithstanding the terms of all or any part of
the Indebtedness, the obligations of Guarantor hereunder to pay and perform all
of the Indebtedness shall, at the option of Silicon, immediately become due and
payable, without notice, and without regard to the expressed maturity of any of
the Indebtedness, in the event: (a) Guarantor shall fail to pay or perform when
due any of its obligations under this Guaranty; or (b) any default or event of
default occurs under any present or future loan agreement, security agreement or
other instrument, document, or agreement between Silicon and Borrower, or (c)
any default or event of default occurs under the Security Agreement or under any
other present or future instrument, document, or agreement between Silicon and
Guarantor. The foregoing are referred to in this Guaranty as "Events of
Default". If acceleration of the time for payment, or the liability of Borrower
to make payment, of any amount specified to be payable by Borrower in respect of

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Silicon Valley Bank                          Cross-Corporate Continuing Guaranty
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the Indebtedness is stayed, prohibited or otherwise affected upon the
insolvency, bankruptcy, reorganization or winding-up of Borrower or any
moratorium affecting the payment of the Indebtedness, all such amounts otherwise
subject to acceleration or payment will nonetheless be deemed for all purposes
of this Guaranty to be and to become due and payable by Borrower and shall be
payable by Guarantor hereunder forthwith on demand by Silicon.

         8.       INDEMNITY. Guarantor hereby agrees to indemnify Silicon and
hold Silicon harmless from and against any and all claims, debts, liabilities,
demands, obligations, actions, causes of action, penalties, costs and expenses
(including without limitation attorneys' fees), of every nature, character and
description, which Silicon may sustain or incur based upon or arising out of any
of the Indebtedness, any actual or alleged failure to collect and pay over any
withholding or other tax relating to Borrower or its employees, any relationship
or agreement between Silicon and Borrower, any actual or alleged failure of
Silicon to comply with any writ of attachment or other legal process relating to
Borrower or any of its property, or any other matter, cause or thing whatsoever
occurred, done, omitted or suffered to be done by Silicon relating in any way to
Borrower or the Indebtedness (except any such amounts sustained or incurred as
the result of the gross negligence or willful misconduct of Silicon or any of
its directors, officers, employees, agents, attorneys, or any other person
affiliated with or representing Silicon). Notwithstanding any provision in this
Guaranty to the contrary, the indemnity agreement set forth in this Section
shall survive any termination or revocation of this Guaranty and shall for all
purposes continue in full force and effect.

         9.       SUBORDINATION. Any and all rights of Guarantor under any and
all debts, liabilities and obligations owing from Borrower to Guarantor,
including any security for and guaranties of any such obligations, whether now
existing or hereafter arising, are hereby subordinated in right of payment to
the prior payment in full of all of the Indebtedness. No payment in respect of
any such subordinated obligations shall at any time be made to or accepted by
Guarantor if at the time of such payment any Indebtedness is outstanding. If any
Event of Default has occurred, Borrower and any assignee, trustee in bankruptcy,
receiver, or any other person having custody or control over any or all of
Borrower's property are hereby authorized and directed to pay to Silicon the
entire unpaid balance of the Indebtedness before making any payments whatsoever
to Guarantor, whether as a creditor, shareholder, or otherwise; and insofar as
may be necessary for that purpose, Guarantor hereby assigns and transfers to
Silicon all rights to any and all debts, liabilities and obligations owing from
Borrower to Guarantor, including any security for and guaranties of any such
obligations, whether now existing or hereafter arising, including without
limitation any payments, dividends or distributions out of the business or
assets of Borrower. Any amounts received by Guarantor in violation of the
foregoing provisions shall be received and held as trustee for the benefit of
Silicon and shall forthwith be paid over to Silicon to be applied to the
Indebtedness in such order and sequence as Silicon shall in its sole discretion
determine, without limiting or affecting any other right or remedy which Silicon
may have hereunder or otherwise and without otherwise affecting the liability of
Guarantor hereunder. In case of liquidation, winding up or bankruptcy of
Borrower (whether voluntary or involuntary) or if Borrower will make a bulk sale
of any of its assets within the bulk transfer provisions of any applicable
legislation or any composition with creditors or scheme of arrangement, Silicon
will have the right to rank for its full claims and receive all dividends or
other payments in respect thereof in priority to Guarantor until the claims of
Silicon have been paid in full, and Guarantor will continue liable hereunder for
any balance which may be owing to Silicon by Borrower. In the event of the
valuation by Silicon of any of its security and/or the retention thereof by
Silicon, such valuation and/or retention will not, as between Silicon and
Guarantor, be considered as a purchase of such security, or as payment or
satisfaction or reduction of the Indebtedness or any part thereof. The foregoing
provisions of this Section 9 will not in any way limit or lessen the liability
of Guarantor under any other Section of this Guaranty. Guarantor hereby
expressly waives any right to set-off or compensation or assert any counterclaim
against Borrower.

         10.      REVOCATION. This is a Continuing Guaranty relating to all of
the Indebtedness, including Indebtedness arising under successive transactions
which from time to time continue the Indebtedness or renew it after it has been
satisfied. The obligations of Guarantor hereunder may be terminated only as to
future transactions and only by giving 90 days' advance written notice thereof
to Silicon at its address above by registered first-class U.S. or Canadian mail,
postage prepaid, return receipt requested. No such revocation shall be effective
until 90 days following the date of actual receipt thereof by Silicon.
Notwithstanding such revocation, this Guaranty and all consents, waivers and
other provisions hereof shall continue in full force and effect as to any and
all Indebtedness which is outstanding on the effective date of revocation and
all extensions, renewals and modifications of said Indebtedness (including
without limitation amendments, extensions, renewals and modifications which are
evidenced by new or additional instruments, documents or agreements executed
after revocation), and all interest thereon, then and thereafter accruing, and
all attorneys' fees, court costs and collection charges theretofore and
thereafter incurred in endeavoring to collect or enforce any of the foregoing
against Borrower, Guarantor or any other person liable thereon (whether or not
suit be brought) and any other expenses of, for or incidental to collection
thereof.

         11.      INDEPENDENT LIABILITY. Guarantor hereby agrees that one or
more successive or concurrent actions may be brought hereon against Guarantor,
in the same action in which Borrower may be sued or in separate actions, as
often as deemed advisable by Silicon. The liability of Guarantor hereunder is
exclusive and independent of any other guaranty of any or all of the
Indebtedness whether executed

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Silicon Valley Bank                          Cross-Corporate Continuing Guaranty
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by Guarantor or by any other guarantor (including without limitation any other
persons signing this Guaranty). The liability of Guarantor hereunder shall not
be affected, revoked, impaired, or reduced by any one or more of the following:
(a) the fact that the Indebtedness exceeds the maximum amount of Guarantor's
liability, if any, specified herein or elsewhere (and no agreement specifying a
maximum amount of Guarantor's liability shall be enforceable unless set forth in
a writing signed by Silicon or set forth in this Guaranty); or (b) any direction
as to the application of payment by Borrower or by any other party; or (c) any
other continuing or restrictive guaranty or undertaking or any limitation on the
liability of any other guarantor (whether under this Guaranty or under any other
agreement); or (d) any payment on or reduction of any such other guaranty or
undertaking; or (e) any revocation, amendment, modification or release of any
such other guaranty or undertaking; or (f) any dissolution or termination of, or
increase, decrease, or change in membership of any Guarantor which is a
partnership. Guarantor hereby expressly represents that it was not induced to
give this Guaranty by the fact that there are or may be other guarantors either
under this Guaranty or otherwise, and Guarantor agrees that any release of any
one or more of such other guarantors shall not release Guarantor from its
obligations hereunder either in full or to any lesser extent.

         12.      FINANCIAL CONDITION OF BORROWER. Guarantor is fully aware of
the financial condition of Borrower and is executing and delivering this
Guaranty at Borrower's request and based solely upon its own independent
investigation of all matters pertinent hereto, and Guarantor is not relying in
any manner upon any representation or statement of Silicon with respect thereto.
Guarantor represents and warrants that it is in a position to obtain, and
Guarantor hereby assumes full responsibility for obtaining, any additional
information concerning Borrower's financial condition and any other matter
pertinent hereto as Guarantor may desire, and Guarantor is not relying upon or
expecting Silicon to furnish to him any information now or hereafter in
Silicon's possession concerning the same or any other matter.

         13.      FOREIGN CURRENCY OBLIGATIONS. Guarantor will make payment
relative to the Indebtedness in the currency (the "Original Currency") in which
Borrower is required to pay such Indebtedness. If Guarantor makes payment
relative to any Indebtedness to Silicon in a currency (the "Other Currency")
other than the Original Currency (whether voluntarily or pursuant to an order or
judgment of a court or tribunal of any jurisdiction), such payment will
constitute a discharge of the liability of Guarantor hereunder in respect of
such Indebtedness only to the extent of the amount of the Original Currency
which Silicon is able to purchase at Santa Clara, California with the amount it
receives on the date of receipt. If the amount of the Original Currency which
Silicon is able to purchase is less than the amount of such currency originally
due to it in respect to the relevant Indebtedness, Guarantor will indemnify and
save Silicon harmless from and against any loss or damage arising as a result of
such deficiency. This indemnity will constitute an obligation separate and
independent from the other obligations contained in this Guaranty, will give
rise to a separate and independent cause of action, will apply irrespective of
any indulgence granted by Silicon and will continue in full force and effect
notwithstanding any judgment or order in respect of any amount due hereunder or
under any judgment or order.

         14.      TAXES AND SET-OFF BY GUARANTOR. All payments to be made by
Guarantor hereunder will be made without set-off, compensation or counterclaim
and without deduction for any taxes, levies, duties, fees, deductions,
withholdings, restrictions or conditions of any nature whatsoever. If at any
time any applicable law, regulation or international agreement requires
Guarantor to make any such deduction or withholding from any such payment, the
sum due from Guarantor with respect to such payment will be increased to the
extent necessary to ensure that, after the making of such deduction or
withholding, Silicon receives a net sum equal to the sum which it would have
received had no deduction or withholding been required.

         15.      ADDITIONAL SECURITY. This Guaranty is in addition and without
prejudice to any security of any kind (including other guarantees, security
agreements and hypothecs) now or hereafter held by Silicon and any other rights
or remedies that Silicon might have.

         16.      SET-OFF BY CREDITOR. Silicon may, to the fullest extent
permitted by law, set-off, compensate and apply any and all deposits at any time
held by Silicon and any other indebtedness at any time owing by Silicon to or
for the credit or for the account of Guarantor against any and all of the
Indebtedness of Guarantor now or hereafter existing under this Guaranty even if
(a) Silicon has not made any demand hereunder, (b) Indebtedness are contingent
or unmatured, or (c) the Indebtedness is not in the same currency as the
offsetting deposits or indebtedness which may be owing by Silicon.

         17.      CORPORATE CHANGES. Guarantor will not engage in any
fundamental corporate change including, without limitation, any amalgamation,
continuation, reorganization, arrangement, reduction in capital, liquidation,
dissolution or winding-up, without Silicon's prior written consent.

   18. REPRESENTATIONS AND WARRANTIES. Guarantor hereby represents and warrants
that (i) it is in Guarantor's direct interest to assist Borrower in procuring
credit, because Borrower is an affiliate of Guarantor, furnishes goods or
services to Guarantor, purchases or acquires goods or services from Guarantor,
and/or otherwise has a direct or indirect corporate or business relationship
with Guarantor, (ii) this Guaranty has been duly and validly authorized,
executed and delivered and constitutes the valid and binding obligation of
Guarantor, enforceable in accordance with its terms, and (iii) the execution and
delivery of this Guaranty does not violate or constitute a default under (with
or without the giving of notice, the passage of time, or both) any order,
judgment, decree, instrument or agreement to

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Silicon Valley Bank                          Cross-Corporate Continuing Guaranty
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which Guarantor is a party or by which it or its assets are affected or bound.

         19.      COSTS; INTEREST. Whether or not suit be instituted, Guarantor
agrees to reimburse Silicon on demand for all reasonable attorneys' fees and all
other reasonable costs and expenses incurred by Silicon in enforcing this
Guaranty, or arising out of or relating in any way to this Guaranty, or in
enforcing any of the Indebtedness against Borrower, Guarantor, or any other
person, or in connection with any property of any kind securing all or any part
of the Indebtedness. Without limiting the generality of the foregoing, and in
addition thereto, Guarantor shall reimburse Silicon on demand for all reasonable
attorneys' fees and costs Silicon incurs in any way relating to Guarantor,
Borrower or the Indebtedness, in order to: obtain legal advice; enforce or seek
to enforce any of its rights; commence, intervene in, respond to, or defend any
action or proceeding; file, prosecute or defend any claim or cause of action in
any action or proceeding (including without limitation any probate claim,
bankruptcy claim, third-party claim, secured creditor claim, reclamation
complaint, and complaint for relief from any stay under the Bankruptcy Code or
otherwise); protect, obtain possession of, sell, lease, dispose of or otherwise
enforce any security interest in or lien on any property of any kind securing
any or all of the Indebtedness; or represent Silicon in any litigation with
respect to Borrower's or Guarantor's affairs. In the event either Silicon or
Guarantor files any lawsuit against the other predicated on a breach of this
Guaranty, the prevailing party in such action shall be entitled to recover its
attorneys' fees and costs of suit from the non-prevailing party. All sums due
under this Guaranty shall bear interest from the date due until the date paid at
the highest rate charged with respect to any of the Indebtedness.

         20.      NOTICES. Any notice which a party shall be required or shall
desire to give to the other hereunder (except for notice of revocation, which
shall be governed by Section 10 of this Guaranty) shall be given by personal
delivery or by telecopier or by depositing the same in the United States or
Canadian mail, first class postage pre-paid, addressed to Silicon at its address
set forth in the heading of this Guaranty and to Guarantor at its address
provided by Guarantor to Silicon in writing, and such notices shall be deemed
duly given on the date of personal delivery or one day after the date telecopied
or 3 business days after the date of mailing as aforesaid. Silicon and Guarantor
may change their address for purposes of receiving notices hereunder by giving
written notice thereof to the other party in accordance herewith. Guarantor
shall give Silicon immediate written notice of any change in its address.

         21.      CLAIMS. Guarantor agrees that any claim or cause of action by
Guarantor against Silicon, or any of Silicon's directors, officers, employees,
agents, accountants or attorneys, based upon, arising from, or relating to this
Guaranty, or any other present or future agreement between Silicon and Guarantor
or between Silicon and Borrower, or any other transaction contemplated hereby or
thereby or relating hereto or thereto, or any other matter, cause or thing
whatsoever, whether or not relating hereto or thereto, occurred, done, omitted
or suffered to be done by Silicon, or by Silicon's directors, officers,
employees, agents, accountants or attorneys, whether sounding in contract or in
tort or otherwise, shall be barred unless asserted by Guarantor by the
commencement of an action or proceeding in a court of competent jurisdiction
within Santa Clara County, California, by the filing of a complaint within one
year after the first act, occurrence or omission upon which such claim or cause
of action, or any part thereof, is based and service of a summons and complaint
on an officer of Silicon or any other person authorized to accept service of
process on behalf of Silicon, within 30 days thereafter. Guarantor agrees that
such one year period is a reasonable and sufficient time for Guarantor to
investigate and act upon any such claim or cause of action. The one year period
provided herein shall not be waived, tolled, or extended except by a specific
written agreement of Silicon. This provision shall survive any termination of
this Guaranty or any other agreement.

         22.      CONSTRUCTION; SEVERABILITY. The term "Guarantor" as used
herein shall be deemed to refer to Guarantor, any person resulting from the
amalgamation, merger, consolidation, reorganization, continuation or other
transformation thereof, as well as its successors and assigns. As used in this
Guaranty, the term "property" is used in its most comprehensive sense and shall
mean all property of every kind and nature whatsoever, including without
limitation real or immovable property, personal or movable property, mixed
property, tangible property and intangible property. If any provision of this
Guaranty or the application thereof to any party or circumstance is held
invalid, void, inoperative or unenforceable, the remainder of this Guaranty and
the application of such provision to other parties or circumstances shall not be
affected thereby, the provisions of this Guaranty being severable in any such
instance.

         23.      GENERAL PROVISIONS. Silicon shall have the right to seek
recourse against Guarantor to the full extent provided for herein and in any
other instrument or agreement evidencing obligations of Guarantor to Silicon,
and against Borrower to the full extent of the Indebtedness. No election in one
form of action or proceeding, or against any party, or on any obligation, shall
constitute a waiver of Silicon's right to proceed in any other form of action or
proceeding or against any other party. The failure of Silicon to enforce any of
the provisions of this Guaranty at any time or for any period of time shall not
be construed to be a waiver of any such provision or the right thereafter to
enforce the same. All remedies hereunder shall be cumulative and shall be in
addition to all rights, powers and remedies given to Silicon by law or under any
other instrument or agreement. Time is of the essence in the performance by
Guarantor of each and every obligation under this Guaranty. Silicon shall have
no obligation to inquire into the power or authority of Borrower or any of its
officers, directors, employees, or agents acting or purporting to act on its
behalf, and any Indebtedness made or created in reliance upon the professed
exercise of

                                      -6-
<PAGE>

any such power or authority shall be included in the Indebtedness guaranteed
hereby. This Guaranty is the entire and only agreement (excluding for greater
certainty the Security Agreement) between Guarantor and Silicon with respect to
the guaranty of the Indebtedness of Borrower by Guarantor, and all
representations, warranties, agreements, or undertakings heretofore or
contemporaneously made, which are not set forth herein, are superseded hereby.
No course of dealings between the parties, no usage of the trade, and no parol
or extrinsic evidence of any nature shall be used or be relevant to supplement
or explain or modify any term or provision of this Guaranty. There are no
conditions to the full effectiveness of this Guaranty. The terms and provisions
hereof may not be waived, altered, modified, or amended except in a writing
executed by Guarantor and a duly authorized officer of Silicon. All rights,
benefits and privileges hereunder shall inure to the benefit of and be
enforceable by Silicon and its successors and assigns and shall be binding upon
Guarantor and its successors and permitted assigns. Section headings are used
herein for convenience only. Guarantor acknowledges that the same may not
describe completely the subject matter of the applicable Section, and the same
shall not be used in any manner to construe, limit, define or interpret any term
or provision hereof.

         24.      GOVERNING LAW; VENUE AND JURISDICTION. This instrument and all
acts and transactions pursuant or relating hereto and all rights and obligations
of the parties hereto shall be governed, construed, and interpreted in
accordance with the internal laws of the State of California. In order to induce
Silicon to accept this Guaranty, and as a material part of the consideration
therefor, Guarantor (i) agrees that all actions or proceedings relating directly
or indirectly hereto shall, at the option of Silicon, be litigated in courts
located within Santa Clara County, California, (ii) consents to the jurisdiction
of any such court and consents to the service of process in any such action or
proceeding by personal delivery or any other method permitted by law; and (iii)
waives any and all rights Guarantor may have to transfer or change the venue of
any such action or proceeding.

         25.      LANGUAGE. It is the express wish of the Parties that this
Agreement and any related documents be drawn up and executed in English. Les
parties conviennent que la presente convention et tous les documents s'y
rattachant soient rediges et signes en anglais.

         26.      RECEIPT OF COPY. Guarantor acknowledges receipt of a copy of
this Guaranty.

         27.      MUTUAL WAIVER OF RIGHT TO JURY TRIAL. SILICON AND GUARANTOR
HEREBY WAIVE THE RIGHT TO TRIAL BY JURY IN ANY ACTION, CLAIM, LAWSUIT OR
PROCEEDING BASED UPON, ARISING OUT OF, OR IN ANY WAY RELATING TO: (I) THIS
GUARANTEE OR ANY SUPPLEMENT OR AMENDMENT THERETO; OR (II) ANY OTHER PRESENT OR
FUTURE INSTRUMENT OR AGREEMENT BETWEEN SILICON AND GUARANTOR ; OR (III) ANY
BREACH, CONDUCT, ACTS OR OMISSIONS OF SILICON OR GUARANTOR OR ANY OF THEIR
RESPECTIVE DIRECTORS, OFFICERS, EMPLOYEES, AGENTS, ATTORNEYS OR ANY OTHER PERSON
AFFILIATED WITH OR REPRESENTING SILICON OR GUARANTOR; IN EACH OF THE FOREGOING
CASES, WHETHER SOUNDING IN CONTRACT OR TORT OR OTHERWISE.

Guarantor Signature:

   CLARENT CANADA LTD.

   By /s/ Juliet M. Reising
     ---------------------------------
   Title President
     ---------------------------------

                                      -7-<PAGE>
                                                                   EXHIBIT 10.68

                      LEASE FOR 1221 WEST MINERAL AVENUE

         THIS LEASE, is made and entered into as of this 11th day of February
2003 by and between (hereinafter "Landlord") and Verso Technologies, Inc.
(hereinafter "tenant").

         WITNESSETH, that for an in consideration of the payment of rent and the
keeping and performance of the covenants and agreements by tenant as hereinafter
set forth, Landlord hereby leases unto tenant the following described premises,
situated in the City of Littleton, Arapahoe County, Colorado (hereinafter "the
premises"), to wit: , Suite , Littleton, Colorado 80120.

        Said premises containing 22,660 sq. ft., more or less, of usable square
feet, which constitutes a total of 22,660 sq. ft. of rentable square feet
constituting percent of the building (tenant's proportionate share).

         TO HAVE AND TO HOLD the same with all appurtenances from 12:00 Noon of
the date set forth in the first sentence of this Lease (the "Effective Date")
until 12:00 Noon of the day of January 2006 upon the following terms and
conditions, to wit:

         1.       BASE RENT.
                  The rental for the full term aforesaid shall be $1,111,500.00
payable in thirty-six monthly installments of $30,875.00. Said monthly rental
shall be payable in advance, on or before 12:00 Noon, on the first day of each
calendar month during said term to Landlord's agent personally or at such
address as Landlord may designate from time to time. The initial address for
payment of rent is: Burger Investments P.O. Box 100, Littleton, CO 80160

         2.       DELINQUENT RENT.
                  In the event the rent (including any additional rent due
hereunder) is not paid on or before the FIFTH DAY of the month when due, an
amount equal to TEN PERCENT of that month's rent shall be added to such rent and
shall be considered additional rent hereunder. The addition of such amount and
the collection thereof shall not operate to waive any other rights of Landlord
hereunder for nonpayment of rent or for any other reason. All costs, charges and
expenses which tenant assumes, agrees or is obligated to pay to Landlord
pursuant to this Lease shall be deemed additional rent, and, in the event of
nonpayment Landlord shall have all the rights and remedies with respect thereto
as is herein provided for in case of nonpayment of rent. Tenant covenants to pay
the rent, additional rent and adjustment of rent as in this Lease provided, when
due.

         3.       ADDITIONAL RENT.
                  Tenant shall pay Landlord as additional rent those charges in
respect to Prorated Operating Costs increases determined as set forth in Section
4 and other sums as are required to be paid by Tenant under this Lease. Any such
charges or sums shall be deemed to be rent and shall be payable in the manner
provided and recoverable as rent, and Landlord shall have all rights specified
in this Lease against tenant for default in payments thereof as in the case of
arrears of rent.

                                       1
<PAGE>
         4.       PRORATED OPERATING COSTS.
                  (A) If, in any calendar year during the term of this Lease (or
any extension thereof), the Prorated Operating Costs (as herein defined) paid or
incurred by Landlord shall be higher than such costs for the year 2003 (Base
Year), the rent shall be increased by tenant's proportionate share of such
increase. The term "Prorated Operating Costs" as used herein shall be defined as
set forth in Section 4 (b), below. The Base Year cost figure shall be
established by taking the actual Prorated Operating Costs for 2003 and
multiplying by a fraction the numerator of which is the total square feet in the
building multiplied by 365 and the denominator of which is the sum of the
products of the square feet actually occupied under each lease multiplied by the
number of days of occupancy for the year under the lease. In the event that it
becomes apparent to Landlord that tenant is using more or causing THE increase
in any Prorated Operating Costs (as defined below), than is represented by
tenant's percentage of total leased space in the building, Landlord shall have
the right to adjust the Base Rent of said lease to reflect these costs.
                  (B) Prorated Operating Costs as said term is used herein shall
consist of all expenditures by Landlord to operate and maintain the building.
All operating expenses shall be determined in accordance with generally accepted
accounting principles which shall be consistently applied. The term "Prorated
Operating Costs" as used herein shall mean all expenses, costs and disbursements
(excluding specific costs specially billed to and paid by individual tenants) of
every kind and nature which Landlord shall pay or become obligated to pay
because of or in connection with the operation and maintenance of the building
including by the way of illustration, but not limited to the following:

                           (i) maintenance and security of the building,
including a reasonable portion of the payroll taxes, insurance and employee
benefits for personal hired for such tasks;
                           (ii) all supplies and materials used in the operation
and maintenance of the building;
                           (iii) cost of all water and waste water for the
building, including but not limited to the cost of water, sewer and wastewater.
                           (iv) cost of all maintenance, reasonable building
management, reasonable building management fees not to exceed 5% of gross rents.
and any and all service agreements for the building therein, including, but not
limited to, automated entry doors, alarm and/or security service (if provided by
Landlord) janitorial service, window cleaning service, elevator maintenance and
service, ground maintenance, HVAC, plumbing, rubbish removal service, snow
removal service, but excluding brokerage fees, advertising and other costs
associated with renting space in the building;
                           (v) cost of all insurance relating to the building,
including the cost of casualty and liability insurance applicable to the
building and Landlord's personal property used in connection therewith;
                           (vi) cost of repairs, replacements and general
maintenance of building, however excluding the following:
                                             a) repairs, replacement and general
maintenance paid by proceeds of insurance, by any tenant or by other third
parties.
                                             b) capital repairs and capital
improvements to the building and premises that are amortizable over their useful
lives.
                                             c) repairs and replacements covered
under warranties of contractors, manufactures or vendors.
                                             d) structural repairs to the
building's roof, foundation, exterior walls, unless caused by tenant , tenant
installed HVAC or tenant invitees

                                       2
<PAGE>
                           (vii) all Real Estate Taxes for the building at the
rate to be assessed on the completed building and assessments and special
assessments imposed upon the building by any and all governmental bodies or
authorities, and all charges specifically imposed in lieu of such taxes.

                  (C) Landlord shall, as soon as practical after the end of each
calendar year, furnish to tenant a written statement showing in detail
Landlord's Prorated Operating Costs for the preceding calendar year and for the
Base Year 2003, if they are not the same, and showing the amount, if any of any
increase in the rent due from tenant for such calendar year. In the event this
Lease shall commence on any date other than the first day of a calendar year,
tenant's proportionate share shall be adjusted proportionately to the time that
tenant occupies the premises. In addition to the monthly rental payment next
following tenant's receipt of such statement, tenant shall pay to Landlord an
amount equal to the sum of the rental adjustment for the entire preceding
calendar year (or a portion thereof, if tenant occupied the premises only part
of the year) and 1/12th of the rental adjustment for the then present calendar
year (calculated by taking 1/12th of the adjustment for the preceding calendar
year). Subsequent monthly rental payments shall be increased by 1/12th of the
rental adjustment for said preceding calendar year. Any adjustments in tenant's
favor shall be credited against the next rent payment(s) due under the Lease or
by check within 30 days after the adjustment is determined.

                  (D) Notwithstanding anything contained in this Section 4, the
rent payable by tenant shall in no event be less than the base rent as specified
in Section 1.(above)

                  (E) Tenant may request and Landlord shall provide tenant with
copies of all real estate property tax assessments, tax bills, and notices of
special assessment relating to the premises.

                  (F) Tenant and its agents or representatives shall have the
right to inspect all books and records of Landlord relating to Prorated
Operating Costs upon reasonable notice to Landlord. If tenant disagrees with the
calculation of Prorated Operating Costs for any year, tenant may obtain an audit
of such costs by an independent certified public accountant acceptable to both
Landlord and tenant. Tenant shall pay the cost of the audit, except that
Landlord shall pay such cost if the audit discloses an error of more than 5% in
tenant's favor. Tenant shall pay any underpayment of Prorated Operating Costs
discovered by the audit as provided in paragraph (c) above. Landlord shall
refund any overpayment in operating costs to tenant as soon as possible.

         5.       SECURITY DEPOSIT.
                  Concurrently with the execution of this Lease, tenant has
deposited with Landlord the sum of $0.00 the following purposes:
                  (A) $0.00 on account for first monthly rent reserved.
                  (B) $46,312.00 payable on the Effective Date as security for
the payment by tenant of the rent herein agreed to by paid, and for the faithful
performance of all the terms, conditions and covenants of this Lease. Landlord
shall have the right to use said deposit, or so much thereof as necessary, in
payment of any rental in default as aforesaid and in reimbursement of any
expense incurred by Landlord and in payment of any damages incurred by Landlord
by reason of tenant's default; or at the option of Landlord, the same may be
retained by Landlord. In such event, on written demand of Landlord, tenant shall
forthwith remit to Landlord a sufficient amount in cash to restore said deposit
to its original amount. In the event said deposit has not been utilized as
aforesaid, said deposit, or as much thereof as has not been utilized for said
purposes, shall be

                                       3
<PAGE>
refunded to tenant, without interest, upon full performance of this Lease by
tenant within 60 days of expiration of the Lease. Landlord shall have the right
to co-mingle said deposit with other funds of Landlord. Landlord may deliver the
funds deposited herein by tenant to any purchaser of Landlord's interest in the
leased premises in the event such interest be sold, and Landlord shall
thereafter be discharged from further liability with respect to such deposit.
Said deposit shall not be considered as liquidated damages, and if claims of
Landlord exceed said deposit, tenant shall remain liable for the balance of such
claims.
                  (C) See Section 21 for additional Security Deposit Provisions.

         6.       LIABILITY INSURANCE.
                  Tenant shall provide and maintain public liability insurance
and property damage insurance in standard form with bodily limits of
$1,000,000.00 as to any one person and $1,000,000.00 as to more than one person
in any one accident with property damage limits of $500,000.00. Tenant shall
furnish Landlord annually with a CERTIFICATE OF INSURANCE and shall name
Landlord as an additional insured on said Certificate. Tenant shall not hold or
attempt to hold Landlord liable for any injury or damage, either proximate or
remote, occurring through or caused by any repairs, alterations, injury or
accident to adjacent premises or other parts of the premises not herein demised
(except to the extent any of the above results from negligence or intentional
acts or omissions of Landlord or Landlord's employees, contractors, or invitees)
or by reason of the negligence or default of other person or persons; nor shall
tenant hold or attempt to hold Landlord liable for any injury or damage
occasioned by defective electric wiring, or the breakage or stoppage of plumbing
or sewerage upon the premises or upon adjacent premises, whether said breakage
or stoppage results from freezing or otherwise. Tenant is responsible for their
own Personal Property Insurance and Workmen Compensation Insurance (if required
by law). Landlord shall carry property damage insurance in an amount as required
by lender

                  Landlord and tenant hereby release each other and their
respective agents and employees from any and all liability to each other or
anyone claiming through or under them by way of subrogation or otherwise for any
loss or damage to property caused by or resulting from risks insured against (or
which would have been insured against had that party carried all insurance
required by this Section 6) under any insurance policy covering loss or damage
to the premises or any part thereof.

         7.       CONDITION OF PREMISES.
                  (A) Tenant shall use the premises for general office and
software-related assembly purposes and shall not use or permit the premises to
be used for any other purpose without written permission of Landlord.
                  (B) Tenant shall not store or display items outside of the
premises. The outside area is specifically intended for parking, loading and
unloading for the premises. Tenant shall keep the premises clean and free from
obstructions.
                  (C) Tenant shall neither permit or cause the premises or the
walls or floors thereof, to be endangered by overloading nor permit or cause the
premises to be used for any purpose which would render the insurance thereon
void or the insurance risk more hazardous.

                  (d) TENANT SHALL USE THE PREMISES SOLELY FOR THE PURPOSES OF
AND SOFTWARE-RELATED ASSEMBLY.

         8.       OCCUPANCY OF PREMISES.

                                       4
<PAGE>
                   (A) The premises shall be made available to tenant at the
commencement of the Lease term in a clean condition with all work completed
and/or necessary repairs having been made. If for any reason the premises shall
not be ready or available for occupancy at the commencement of the Lease term,
this Lease shall nevertheless continue in full force and effect; and tenant
shall have no right to rescind, cancel or terminate the same. Landlord shall not
be liable for damages, if any, sustained by tenant on account of failure to
obtain possession at the date specified for commencement of the term herein, and
in such event the rent for the premises shall not commence until the premises
are available and ready for occupancy. Occupancy of the premises by tenant shall
be deemed acceptance of the premises by tenant in good suitable condition and
acknowledgment of completion in full accordance with the provisions hereof
unless otherwise agreed to by Landlord and tenant.
                  (B) At the expiration of this Lease, tenant shall surrender
and deliver up the premises in a good order and condition as when the same was
entered upon, loss by casualty, inevitable accident, or ordinary wear and tear
excepted.

         9.       LEASE RENEWAL.
                  It is mutually agreed that no later than 180 DAYS prior to the
expiration of this Lease, Landlord shall present a renewal lease to tenant. If
for any reason a lease renewal cannot be executed, tenant will allow Landlord to
post "lease availability" signs on building directory and allow Landlord to show
prospective tenants the premises at any time during normal business hours 150
DAYS prior to lease termination.

         10.      MAINTENANCE AND REPAIRS.
                  (A) Landlord shall make and pay for all repairs and
maintenance of the demised premises, including, but not limited to, the roof,
exterior walls, foundation, parking lot, grounds, common areas of the building,
plumbing, HVAC system, (excluding tenant installed HVAC systems) elevator,
electrical system (excluding tenant installed systems and additions). Landlord
shall promptly maintain and make such repairs, subject to delays caused by
strikes, fires, accidents, acts of God, orders of military, civil or
governmental authority; or any other causes beyond the control of Landlord.

                  (B)      Landlord, at Landlord's expense, shall provide:
                           (i)      Snow removal from parking lot and walkways
                                    as necessary.
                           (ii)     Trash removal from building disposal unit
                                    located in parking lot.
                           (iii)    Janitorial service, five days a week,
                                    Holidays excluded.
                           (iv)     Exterior window washing as necessary.
                           (v)      To supply restrooms with paper towels,
                                    tissues and hand soap.
                           (vi)     To supply bulbs, tubes and ballast for
                                    tenant, weekends and Holidays excluded.
                  (C) Tenant may be required to make and pay for any such
repairs or maintenance to the premises and/or Common Areas of building, parking
lot and grounds which becomes necessary by reason of the act of negligence of
tenant, its agents, licensees, servants, employees or customers to the extent
the repairs are not covered by the insurance carried by Landlord or tenant under
Section 6 of this Lease.

         11.      RULES AND REGULATIONS.
                  (A) CHANGES: These rules and regulations may be added to or
amended from time to time at Landlord's discretion. Such reasonable additions or
amendments shall become effective when reduced to writing and communicated to
tenant.

                                       5
<PAGE>
                  (B) SMOKE FREE: The entire building and, including the leased
premises is considered SMOKE-FREE. The door entry ways are SMOKE- FREE. Landlord
shall designate a Smoking Area and at Landlord's discretion may relocate Smoking
Area. Tenant and tenant's invitee's shall refrain from smoking of any kind
except in the designated Smoking Area.

                  (C) SIGNS: No signs, notices, advertisements or other
inscriptions shall be placed upon the INTERIOR AND/OR exterior of the premises
by tenant without written permission of Landlord.

                  (D) PARKING: Tenant's employee and customer parking is
authorized in the general parking area of the building. There is no overnight
parking of non-operational vehicles. All vehicles that are on the lot must be in
operating condition, which includes a functional engine, tires and current tags.
Landlord shall have the right, from time to time, to establish, modify and
enforce reasonable rules and regulations with respect to the parking area, and
tenant agrees to abide by and conform to said rules and regulations. Landlord
reserves the right to assign parking spaces for tenant use. In such event,
parking spaces shall be reserved for tenant in a percentage at least equal to
tenant's proportionate share. Landlord is not responsible for damage or theft of
tenant's vehicles or tenant's invitee's vehicles. Landlord is not responsible
for theft or damage to bicycle.
                  (E) ANIMALS: Except for Guide Dogs, animals are not permitted
at any time in the building or on the grounds.
                  (F) LOCKS: Tenant shall not attach any additional lock(s) on
any door in the building without written consent of the Landlord.
                  (G) MOVING: Furniture, equipment, or supplies shall be moved
in or out of the building only during such hours and in such a manner as may be
prescribed by the Landlord Tenant is solely responsible to any and all damage to
building and grounds caused by tenant or tenant's invitee's during a moving
processes. TENANT MUST INFORM LANDLORD IF MOVING IS REQUIRED,AND IFif the
elevator is to be utilized. Tenant shall not utilize the elevator exclusively
and shall not hinder the normal operation of the elevator. Tenant is responsible
for paying Landlord all costs of repairs to building and elevator for any damage
caused to building or elevator for any move of furniture and equipment from the
second floor to the first floor.
                  (H) WEIGHT: No safe or article, the weight of which may
constitute a hazard or danger to the building or its equipment shall be moved
onto the premises.
                  (I) NOISE: Tenant shall refrain from loud noises and excessive
television and /or radio volume that may disturb other tenants.
                 (J) INSTALLATION: Tenant shall not install any antenna,
satellite dish or other device of any kind on the exterior walls or building
roof without Landlord's prior approval, which approval shall not be unreasonably
withheld or delayed.
                  (K) ELEVATOR: Landlord shall not be liable for any damages
from the stoppage of the elevator for necessary or desirable repairs or
improvements or delays of any sort or duration in connection with the elevator
service.

                  (L) RESTROOMS: The restrooms and other water fixtures shall
not be used for any other purposes other than that which they were intended, and
any damage resulting from misuse on the part of the tenant or the tenant's
invitee's shall be payable to Landlord. No person shall waste water by
interfering with faucets or valves.
                  (M) MODIFICATION AND SERVICE APPROVAL: Tenant shall have the
right, at tenant's sole expense to make changes or alterations to the premises;
provided, however that in all cases any such changes or alterations shall be
made subject to the following conditions, which the tenant agrees to observe and
perform:

                                       6
<PAGE>
                           (i) Tenant shall make no material alterations in or
additions or repairs to the premises without first obtaining written consent of
Landlord, which consent shall not be unreasonably withheld; and tenant shall
notify Landlord at least ten (10) business days in advance of any alterations in
or repairs or additions to the premises which tenant proposes to make. Tenant
shall post notice pursuant to the Colorado Mechanics Lien Act so that any lien
recorded against the property of which the premises are a part does not attach
to Landlord's interest. Tenant shall coordinate any work it proposes to perform
upon the premises with Landlord in order to prevent a disruption of the
building's operation
                           (ii) All such alterations, additions or improvements
shall be made at tenant's sole cost and expense and except for furniture and
trade fixtures, shall become the property of the Landlord and shall be
surrendered with the premises, as part thereof, at the end of the term hereof.
Landlord may, by written notice to tenant given at least thirty (30) days prior
to the end of the term, require tenant to remove all such improvements installed
by the tenant and to repair any damage to the premises from such removal. Tenant
shall construct such improvements, alterations or repairs in conformance with
any and all applicable rules and regulations of any Federal, State, County,
City, Municipal, Special District laws, code or ordinance. At least ten (10)
days before the commencement of any such work, tenant agrees to provide Landlord
with Lien Waivers from all persons performing such work and materialmen
providing materials used in connection therein. In the event tenant orders any
construction, alterations, decorating or repair work directly from Landlord, the
charges for such work shall be payable to Landlord upon satisfactory completion
of such work. If not paid when invoiced, such nonpayment shall be deemed an
event of default hereunder. Tenant's contractors and invitee's shall comply with
Landlord's rules and regulations. Tenant is solely responsible for any damage
caused to building and grounds by tenant's contractors and invitee's.

                  (N) UTILITIES: Landlord is not responsible, and tenant shall
not hold Landlord responsible for any disruptions of utilities. Landlord is not
responsible for any damage and/or loss to computers, computer related equipment,
electronic equipment, office machines, telecommunication equipment, data and/or
data storage equipment.
                  (O) COMPLIANCE: Tenant covenants to comply with all lawful
orders, regulations, building codes and requirements issued by Federal, State,
County or Municipal governments, or any department or division thereof, insofar
as the same are applicable to tenant's possession and occupancy of the premises.
Tenant shall not use the premises for any unlawful, improper or questionable
purposes whatsoever, and shall keep the premises in a clean and sanitary
condition. Tenant shall neither permit nor cause any disorderly conduct, noise,
or nuisance whatsoever about the premises which would have tendency to annoy or
disturb the tenants of adjacent premises. Landlord shall take all actions
necessary to insure that the building and common areas comply with all Federal,
State, County and Municipal rules and regulations.

         12.      SUBLETTING.
                  Tenant shall have the right to sublet all or part of the
premises with the written consent of Landlord, provided that tenant shall remain
liable for the payment of rent and for the performance of the covenants
contained herein, for the balance of any term. Landlord consent will not be
unreasonably withheld. Landlord shall provide written notification to tenant of
the grant or denial of consent within ten days after receiving a request for
consent. If Landlord denies its consent, written notification shall include a
detailed explanation for the denial.

         13.      RENEWALS AND HOLDING OVER.

                                       7
<PAGE>
                  It is mutually agreed that if after the expiration of the
Lease, tenant remains in possession of said premises, and continues to pay rent
with written agreement with the Landlord as to such possession, then tenant
shall be regarded as a tenant from month to month at a monthly rental, payable
in advance, at a rate of 150% of the last monthly installment hereunder, and
subject to all the terms and provisions of this Lease.

         14.      DEFAULT.
                  It is expressly understood and agreed by the parties hereto,
that if the rent above reserved or utilities payable by tenant, or any part
hereof, shall be in arrears and tenant shall not cure the same within than five
days after receipt of written notice or if tenant shall fail to perform any of
the other covenants or agreements herein contained which are to be kept by
tenant and tenant shall not cure such failure within ten days after receipt of
written notice, tenant shall be deemed to be in default of this Lease. In such
event, it shall and may be lawful for Landlord to declare said term ended, and
enter into the premises, or any part thereof, either with or without process of
law, and tenant or any person or persons occupying the same, to expel, remove,
and to put out, using such force as may be necessary in so doing, without being
liable to prosecution or in damages therefore, and the premises again to
repossess and enjoy as in the first and former estate of Landlord. And, if at
any time said term shall be ended as aforesaid or in other way, tenant hereby
covenants and agrees to surrender and deliver up the premises peaceably to
Landlord, immediately upon the termination of said term, and if tenant shall
remain in the possession of the same after the termination thereof, tenant shall
be deemed guilty of forcible detainer of said premises under the Statute, hereby
waiving all notice, and shall be subject to eviction and removal, forcibly or
otherwise, with or without process of law, as above stated. The remedies of
Landlord herein shall be in addition to all other remedies allowed by law.
Should Landlord elect to re-enter it may either terminate this Lease or it may
from time to time, without terminating this Lease relet said premises. Upon each
such reletting, all rentals and other sums received by Landlord from such
reletting shall be applied first, to the payment of debt other than rent due
Landlord; second, to costs and expenses of reletting; third, to past due payment
of future rent as the same may become due and payable hereunder. No such entry
or taking possession of said premises by Landlord shall be construed as an
election on its part to terminate this Lease unless a written notice of such
intention be given to tenant or unless the termination thereof be decreed by a
court of competent jurisdiction.

         15.      INSOLVENCY.
                   This Lease is made by and between the parties hereto with the
express understanding and agreement that, in the event tenant becomes insolvent,
or is declared bankrupt, then, in either event, Landlord may declare this Lease
ended, and all rights to tenant hereunder shall thereupon terminate and cease.

         16.      ABATEMENT.
                   (A) It is agreed that if, during the term of this Lease, the
premises shall be so damaged by fire or other casualty, not arising from the
fault or negligence of the tenant, or those in its employee, so that the
premises shall thereby be rendered unfit for use or occupancy, then the rent
herein reserved or a just proportionate part thereof, according to the nature
and extent of the damage which has been sustained, shall be abated until the
premises shall have been duly repaired and restored, which work of repair and
restoration shall be done with all reasonable diligence.
                   (B) In case the premises shall be substantially destroyed, so
that the premises are not repaired or restored within 120 days, the rent shall
be abated in accordance with Section 16(A)

                                       8
<PAGE>
provided, however, the Landlord or tenant shall have the right to cancel this
Lease and end the term hereof, and all further obligations upon the part of
either party hereto, shall cease and the estate hereby created shall thereupon
terminate.

         17.      ATTORNEY'S FEES.
                  In the event either party hires an attorney to enforce any of
the terms of this Lease, including, without limitation, collection of any sums
due hereunder, the prevailing party shall be entitled to recover reasonable
attorneys' fees, costs and expenses, and in the event of any litigation,
mediation or arbitration concerning the enforcement or interpretation of this
Lease, the prevailing party shall be awarded its reasonable attorneys' fees,
costs and expenses with respect thereto.

         18.      SUBORDINATION.
                  This Lease is subject and subordinate to all present mortgages
or Deeds of Trust affecting the real estate on which the building is located and
the building of which the premises forms a part, and to all renewals or
extensions thereof, and to any mortgage or Deed of Trust which may hereafter be
executed affecting the same; provided, however, that such transactions shall not
affect tenant's right to occupy the premises if tenant is not in default
hereunder and provided further that the holder of any such interest in the
premises shall agree in writing that tenant's possession of the premises and the
rights and privileges under this Lease shall not be impaired or disturbed on
account of any foreclosure or acquisition of title to the premises in lieu of
foreclosure.

         19.      AMENDMENTS OR MODIFICATION OF LEASE.
                  Tenant and Landlord acknowledge and agree that each has not
relied upon any statements, representations, agreements or warranties, except
such as are expressed herein, and that no amendment or modification of this
Lease shall be valid or binding unless expressed in writing and signed by the
parties hereto.

         20.      SEVERABILITY.
                  Should any present or future laws declare any provision of
this Lease invalid effective during the term of lease or by a court of competent
jurisdiction, the remaining provisions hereof shall remain in full force and
effect.

         21.      SUCCESSORS AND ASSIGNS.
                  Except as otherwise provided in Section 12 hereof, the terms
and conditions of this Lease shall be binding upon and shall inure to the
benefit of the respective heirs, personal representatives, successors and
assigns of the parties hereto.

         22.      RIGHT OF QUIET ENJOYMENT.
                  Provided that tenant is not in default of any material term of
this Lease, Landlord hereby warrants and defends tenant's right to occupy the
premises and to use the same for tenant's intended business purposes.

         23.      SALE OF TENANT BUSINESS.
                  In the event that tenant and/or Guarantor ceases to own more
than 50% of the company named in this lease, the new majority owner(s) are
hereby obligated to sign a new lease as tenant and Guarantor. Landlord must be
notified promptly of said event.

                                       9
<PAGE>

         24.      ELECTRIC AND GAS METER.

                  1)       Tenant shall be responsible for payment of the
                           electric and gas meter during the time it is the sole
                           tenant in the building.
                  2)       If tenant fails in keeping account current, Landlord
                           at tenant's expense will restore account. All late
                           charges, late fees and any required deposit is
                           immediately reimbursable to Landlord.
                  3)       At such a time of occupancy of additional tenants in
                           building, Landlord and tenant will agree to one of
                           the following:
                                    i.       Landlord will assume payment of the
                                             electric and gas bill and increase
                                             tenant's monthly base rent by the
                                             average amount per month for
                                             electric and gas for the period of
                                             time tenant is sole occupant of
                                             building adjusted for the amount
                                             allocable to the second floor. (or)
                                    ii.      Tenant will continue to pay gas and
                                             electric and Landlord will
                                             reimburse tenant for electric and
                                             gas charges that exceeds tenant's
                                             average use prior to other
                                             tenant(s) occupying space in
                                             building. (or)
                                    iii.     Landlord and tenant agree on other
                                             equitable terms for electric and
                                             gas use in the building.

         25.     SIGNAGE.
         Tenant shall have the right to install signage on one half (1/2) of the
monument sign on the premises, provided that tenant obtains Landlord's approval
before installing any such sign. Landlord shall not unreasonably withhold or
delay approval of signage that is in good taste and fits with the character of
the building.

         26.    EMINENT DOMAIN.
         If the whole of the premises or the building shall be taken by any
public authority under the power of eminent domain, or by deed in lieu thereof,
then the term of this Lease shall cease as of the day possession shall be taken
by such public authority and the rent and other charges due hereunder, shall be
paid up to that day with a proportionate refund by public authority of such rent
as may have been paid in advance for a period subsequent to the date of the
taking. If less than the whole of the premises or the building shall be taken
under eminent domain and such taking will materially interfere with tenant's
ability to conduct business in the premises, tenant shall have the option to
terminate this Lease or to continue possession of the remainder of the premises.
Tenant shall notify public authority in writing within 30 days after such taking
of public authority. If tenant elects to remain in possession, all of the terms
herein provided shall continue in effect, except that the rental shall be
reduced in proportion to the amount of the Building, if any, taken. If this
Lease continues, public authority shall, at its expense, make all necessary
repairs or alterations to the building, as such existed at the commencement
date, subject to ordinary wear and tear since said date, so as to constitute the
remaining building a complete architectural unit. However, in no event shall
public authority bear the cost of tenant's merchandise, trade fixtures,
furnishings, or operating equipment and personal property. All damages awarded
for such taking under the power of eminent domain, whether for the whole or a
part of the premises, shall belong to and be the property of Landlord whether
such damages shall be awarded as compensation for diminution in value to the
leasehold or to the fee of the premises. Tenant may pursue its own claims for
damages with the appropriate government authority so long as same does not
interfere with, or in any manner diminish, the award of Landlord.

                                       10
<PAGE>

         27.     LANDLORD'S LIEN.
                 Landlord hereby waives any landlord's lien it may have,
whether by statute or common law, on tenant's equipment, inventory, fixtures and
other personal property.

IN WITNESS WHEREOF, the parties have hereunto set their hands and seals this
11th day of February, 2003

LANDLORD:                                   TENANT:

By/s/ Scott Burger                          By: /s/ Juliet M. Reising
  ----------------------                        --------------------------

Burger Investments.                         Verso Technologies, Inc.
Box 100                                     400 Galeria Parkway, Suite 300
Littleton, CO 80160                         Atlanta, GA  30339

                                       11

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