Document:

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                                                                    Exhibit 10.4

                       Code of Business Conduct and Ethics
                       -----------------------------------

         Allergy Research Group, Inc. ("ARG") strives to achieve the highest
business and personal ethical standards as well as compliance with the laws and
regulations that apply to our business. Accordingly, the Company will conduct
its business honestly and ethically wherever we operate in the world. We will
constantly improve the quality of our services, products and operations and will
maintain a reputation for honesty, fairness, respect, responsibility, integrity,
trust and sound business judgment. Adherence to this Code will help to ensure
decisions that reflect these standards. No illegal or unethical conduct on the
part of officers, managers, employees or affiliates is in the company's best
interest. ARG will not compromise its principles for short-term advantage. The
ethical performance of this company is the sum of the ethics of the men and
women who work here. Thus, we are all expected to adhere to high standards of
personal integrity.

         This Code cannot and is not intended to cover every applicable law or
provide answers to all questions that might arise; for that we must rely on each
person's good sense of what is right, including a sense of when it is proper to
seek guidance from others on the appropriate course of conduct. Officers,
managers and employees should also refer to the confidential and proprietary
policies contained in the ARG Employee Handbook.

         It is the obligation of each and every officer, manager and employee of
ARG to become familiar with the goals and policies of the Company and to
integrate them into every aspect of our business.

Conflicts of Interest
---------------------

         Officers, managers, and employees of the Company have a duty of loyalty
to the Company and, therefore, must never permit their personal interests to
conflict, or even appear to conflict, with the interests of the company, its
clients or affiliates. Officers, managers and employees must be particularly
careful to avoid representing ARG in any transaction with others with whom there
is any outside business affiliation or relationship. If such a situation arises,
officers, managers and employees must immediately report the circumstances to
their immediate supervisor, officer or director of the Company. Officers,
managers, and employees shall avoid using their Company contacts to advance
their private business or personal interests at the expense of the Company, its
clients or affiliates.

Use of Insider Information
--------------------------

         It is the Company's goal to protect its shareholders' investments
through strict enforcement of the prohibition against insider trading set forth
in the federal securities laws and regulations. Any misuse of material inside
information in connection with trading in the Company's securities can expose an
individual to civil liability and penalties under the Securities Exchange Act.
Under this Act, managers, officers, and employees in possession of material
information not available to the public are "insiders." Spouses, friends,
suppliers, brokers, and others outside the Company who may have acquired such

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information directly or indirectly from an officer, manager or employee are also
"insiders." No insider may buy or sell securities of ARG at a time when in
possession of "material non-public information." Such information includes
information that is regarded as "material" by the Company, or is important
enough to influence you or any other person in the purchase or sale of
securities of the Company or any company with which we do business, which could
be affected by the inside information.

         Officers, managers and employees must not purchase or sell the
Company's securities if they have knowledge of material information concerning
the Company until such information has been disclosed to the public and the
public has had sufficient time to absorb the information. In addition, no
material information may be disclosed to anyone except those within the Company
whose positions require their use of that information until the information has
been publicly released by the Company.

         These prohibitions extend to the purchase and sale of securities of any
other corporation, the value of which is likely to be affected by an action of
the Company of which the employee is aware and which has not been publicly
disclosed.

Gifts, Bribes and Kickbacks
---------------------------

         Other than for modest gifts given or received in the normal course of
business (including travel or entertainment), no officer, manager or employee
may give gifts to, or receive gifts from, the Company's clients and vendors.
Other gifts may be given or accepted only with prior approval of the officer,
manager or employee's supervisor or senior management. In no event should you
put the Company or yourself in a position that would be embarrassing if the gift
was made public.

         Dealing with government employees is often different than dealing with
private persons. Many governmental bodies strictly prohibit the receipt of any
gratuities by their employees, including meals and entertainment. Officers,
managers and employees must be aware of and strictly follow these prohibitions.

         Any officer, manager or employee who pays or receives bribes or
kickbacks will be immediately terminated. A kickback or bribe includes any item
intended to improperly obtain favorable treatment.

Foreign Corrupt Practices Act (FCPA)
------------------------------------

         U.S. law generally prohibits the Company from making or offering to
make a payment, promise or granting another benefit, directly or indirectly, to
a "foreign official," foreign candidate for political office or foreign
political party for the purpose of improperly causing the foreign official or
foreign political party to act or cause an act for the benefit of the Company or
a subsidiary. "Foreign official" may include employees of state-owned foreign
companies as well as governmental officials.

                                       2
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Confidentiality
---------------

         Officers, managers and employees of ARG will often come into contact
with, or have possession of, proprietary, confidential or business-sensitive
information. Such information must not be disclosed to others, except when such
disclosure is authorized by the Company or legally mandated. This information,
whether it belongs to the Company or any of our clients or affiliates, includes
strategic business plans, operating results, marketing strategies, customer
lists, personnel records, upcoming acquisitions and divestitures, new
investments, or manufacturing costs, processes and methods. Proprietary,
confidential and sensitive business information about our Company, other
companies, individuals and entities must be treated with sensitivity and
discretion and only be disseminated on a need-to-know basis.

         Officers, managers and employees will refrain from gathering competitor
intelligence by improper means and refrain from acting on knowledge that has
been gathered in such a manner. The officers, managers and employees of ARG will
seek to avoid exaggerating or disparaging comparisons of the services and
competence of our competitors.

Disclosure
----------

         ARG is a reporting company under the Securities Act of 1924 and, as
such, has certain disclosure obligations to which it must adhere. Officers,
managers and employees will seek to report all information accurately and
honestly, and as otherwise required by applicable reporting requirements.

         It is the policy of ARG to fully and fairly disclose the financial
condition of the Company in compliance with applicable accounting principles,
laws, rules and regulations. All books and records of the Company shall be kept
in such a way as to fully and fairly reflect all Company transactions.

Equal Employment Opportunity
----------------------------

         ARG's people are a key source to our competitive edge. The Company
strongly supports and recognizes its responsibility to provide equal employment
opportunities to all qualified individuals. Officers, managers and employees
will obey all applicable Equal Employment Opportunity laws and act with respect
and responsibility towards others in all of their dealings.

                                       3
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Duty to Report and Consequences
-------------------------------

         Every officer, manager and employee has a duty to adhere to this Code
and all existing Company policies, and to promptly disclose any unethical,
dishonest, fraudulent and illegal behavior, or any violation of Company policies
and procedures, directly to management. The Company will investigate any matter
so reported and may take appropriate disciplinary and corrective action, up to
and including termination. The degree of discipline imposed may be influenced by
the existence of voluntary disclosure of any ethical violation whether or not
the violator cooperated in any subsequent investigation. The Company forbids
retaliation against any officer, manager or employee who has reported violations
of this Code in good faith.

         If you have any questions regarding any of the goals or standards
discussed, or policies referenced, in this Code, or have any doubt about whether
your conduct or that of another meets the Company's ethical standards or
compromises the Company's reputation, please refer to the Employee Handbook or
discuss the matter with your immediate supervisor, an officer or a director of
the Company.

                                       4<PAGE>

                                                                   EXHIBIT 10.31

                               SUBLEASE AGREEMENT

I.       BASIC SUBLEASE INFORMATION
         --------------------------

Effective Date:                             The date this Sublease Agreement is
                                            executed by both Sublessee and
                                            Sublessor, subject to delivery of
                                            written consent to this Sublease by
                                            the Master Lessor (the "Effective
                                            Date").

Commencement Date:                          The date Possession is delivered to
                                            Sublessee pursuant to Section 8
                                            hereof (the "Commencement Date").

Term:                                       From the Commencement Date through
                                            July 31, 2003, unless terminated
                                            earlier in accordance with the terms
                                            of this Sublease.

Expiration Date:                            July 31, 2003 (the "Expiration
                                            Date").

Landlord:                                   ProLogis Limited Partnership-I, a
                                            Delaware limited partnership
                                            ("Master Lessor").

Premises:                                   Approximately eight thousand five
                                            hundred fifty (8,550) rentable
                                            square feet ("RSF"), located at
                                            47971 Fremont Boulevard, Fremont,
                                            California (the "Building"), as more
                                            particularly described and
                                            illustrated in EXHIBIT A attached
                                            hereto and made a part hereof (the
                                            "Premises").

Use:                                        General Office, research and
                                            development, light assembly,
                                            manufacturing and storage of
                                            Sublessee's products only and for no
                                            other purpose.

Rent Commencement Date:                     Fourteen (14) days after the date
                                            Possession is delivered to
                                            Sublessee.

Monthly Rent:                               Five Thousand Five Hundred
                                            Fifty-Seven and 50/100 Dollars
                                            ($5,557.50)

Prepaid Rent:                               Upon execution of this Sublease,
                                            Sublessee shall tender to Sublessor
                                            the Monthly Rent for the first month
                                            in the amount of $5,557.50.

Security Deposit:                           Upon execution of this Sublease,
                                            Sublessee shall tender Five Thousand
                                            Five Hundred Fifty-Seven and 50/100
                                            Dollars ($5,557.50) to Sublessor as
                                            the "Security Deposit."

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Sublessee's Proportionate Share of
Sublessor's Proportionate Share:            Sublessee shall
                                            pay forty-nine percent (49%) of
                                            Sublessor's Proportionate Share of
                                            Operating Expenses, including real
                                            property taxes, common area
                                            maintenance, property insurance and
                                            assessments incurred by Sublessor
                                            for the Premises, which is estimated
                                            at One Thousand Eight Hundred Eighty
                                            and No/100 Dollars ($1,880.00) per
                                            month to be paid in advance, with
                                            reconciliation at the end of the
                                            Term. Sublessee shall tender to
                                            Sublessor Sublessee's Proportionate
                                            Share for the first month upon
                                            execution of this Sublease.
                                            Sublessee's Proportionate Share
                                            shall be considered additional rent.

Parking:                                    Sublessee shall have the right park
                                            in common with other tenants of the
                                            Project in those areas designated
                                            for non-reserved parking.

Sublessee:                                  CXR Telcom Corporation, a Delaware
                                            corporation.

Sublessee's Address After
Effective Date:                             CXR Telcom Corporation
                                            47971 Fremont Boulevard
                                            Fremont, California 94538
                                            Contact Name: Mr. Kevin Haug

With a copy to:                             Microtel International, Inc.
                                            9485 Haven Avenue, Suite #100
                                            Rancho Cucamonga, California 91730
                                            Contact Name: Mr. Randy Foote

Sublessor:                                  Novellis Systems, Inc., a California
                                            corporation.

Sublessor's Address:                        4000 North First Street, M/S 60B
                                            San Jose, California 95134
                                            Contact Name:  Randy McFarland

Sublessor's Broker:                         Commercial Property Services

Sublessee's Broker:                         Colliers International, Inc.

Tenant Improvements:                        Tenant Improvements to be performed
                                            by Sublessor prior to the
                                            Commencement Date as described on
                                            EXHIBIT B attached hereto and made
                                            a part hereof.

II.      RECITALS
         --------

         THIS SUBLEASE AGREEMENT ("Sublease") is entered as of the Effective
Date by and between Sublessor and Sublessee.

                                      -2-

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         THE PARTIES ENTER this Sublease on the basis of the following facts,
understandings and intentions:

         A. Gamma Precision Technology, Inc., a California corporation ("GPT"),
entered into that certain Lease dated June 22, 2000 (the "Master Lease") with
ProLogis Limited Partnership - I, a Delaware limited partnership, for the lease
of approximately 17,350 RSF of the Building. A copy of the Master Lease
(including all exhibits thereto) is attached as EXHIBIT C hereto and made a part
hereof.

         B. Pursuant to an agreement of merger and plan of reorganization dated
as of August 30, 2000, Gasonics International Corporation, a Delaware
corporation ("Gasonics"), acquired all of the outstanding common shares of GPT
and the Master Lease was assigned to Gasonics with the landlord's consent dated
September 18, 2002.

         C. Pursuant to a merger and acquisition between Gasonics and Sublessor,
Sublessor acquired all of the shares of Gasonics and became the
successor-in-interest to Tenant's interest in the Master Lease under an
assignment and assumption of lease between Gasonics and Sublessor dated January
10, 2001.

         D. Sublessor desires to sublease the Premises to Sublessee, and
Sublessee desires to sublease the Premises from Sublessor, on all of the terms,
covenants and conditions hereinafter set forth.

         NOW, THEREFORE, IN CONSIDERATION of the mutual covenants and promises
of the parties, the parties hereto agree as follows:

         1. SUBLEASE. Sublessor shall sublease to Sublessee, and Sublessee shall
sublease from Sublessor, the Premises for the Term upon all of the terms,
covenants and conditions herein contained, and Sublessee shall have the right to
use all common areas within the Project (as that term is defined in the Master
Lease) to the extent that Sublessor has such rights under the Master Lease.
Sublessor warrants and represents to Sublessee that (i) Sublessor has not
executed any amendments or modifications to the Master Lease and that the
documents attached hereto as Exhibit C, as assigned, constitute a full and
complete copy of the Master Lease, (ii) the Master Lease commenced on June 22,
2000 and, unless sooner terminated in accordance with the terms of the Master
Lease, the term expires on July 31, 2003, (iii) as of the date of execution
hereof by Sublessor, Sublessor has received no written notice from Landlord of
any current default or breach of any of the terms of the Master Lease, nor to
its knowledge is there any fact or circumstance that with the delivery of notice
or the passage of time would constitute an event of default under the Master
Lease, and (iv) Sublessor is in possession of the Premises.

         2. CONDITION OF THE PREMISES.

                  a. PHYSICAL CONDITION. Sublessee acknowledges that Sublessee
has conducted Sublessee's own investigation of the Premises and the physical
condition thereof, including accessibility and location of utilities,
improvements, existence of hazardous materials, including but not limited to
asbestos, asbestos containing materials, polychlorinated biphenyls (PCB), and
earthquake preparedness, which in Sublessee's judgment affect or influence
Sublessee's use of the Premises and Sublessee's willingness to enter into this
Sublease. Sublessee shall, except for the representations expressly set forth in
this subparagraph, rely solely on Sublessee's own inspection and examination of

                                      -3-

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such items and not on any representations of Sublessor, express or implied.
Sublessee agrees that the Premises shall be subleased on an "as is" built-out
condition with the exception of the improvements shown on Exhibit B, which
improvements are estimated to be completed by Sublessor on or before October 23,
2002, and that Sublessor has made no representations or warranties of any kind
in connection with improvements or physical conditions on, or bearing on, the
use of the Premises, except as expressly set forth in this subsection and
Section 9.

                  b. REPRESENTATION AND WARRANTY. Sublessee represents and
warrants to Sublessor that Sublessee has been given the opportunity to examine
and inspect all matters with respect to taxes, expenses, insurance costs, bonds,
permissible uses, the Master Lease, zoning, covenants, conditions and
restrictions and all other matters which, in Sublessee's judgment, bear upon the
value and suitability of the Premises for Sublessee's purposes, and that
Sublessee has either so examined or investigated such matters or knowingly
declined to so examine or investigate any or all of such matters. Except as
otherwise expressly provided herein, Sublessee has and will rely solely on
Sublessee's own inspection and examination of such items and not on any
representations of Sublessor. Based thereon, Sublessee agrees to accept delivery
of the Premises in their condition as of the date this Sublease is fully
executed, subject only to Sublessor's obligation to complete the Tenant
Improvements described in EXHIBIT B.

         3. SUBLEASE SUBJECT TO MASTER LEASE.

                  a. INCLUSIONS. All of the terms., conditions and covenants of
this Sublease shall be those stated herein and those stated in the Master Lease,
the terms of which are incorporated herein by reference, except as excluded in
Section 3.b herein, modified as appropriate in the circumstances so as to make
such terms, covenants and conditions applicable only to the subleasing
hereunder. Sublessee shall be subject to, bound by, to the extent applicable to
Sublessee's use of the Premises, assume, and comply with all of said terms,
covenants and conditions of the Master Lease with respect to the Premises and
shall satisfy all applicable terms and conditions of the Master Lease for the
benefit of both Master Lessor and Sublessor, it being understood and agreed that
wherever in the Master Lease the word "Tenant" appears, for the purposes of this
Sublease, the word "Sublessee" shall be substituted; where the word "Landlord"
appears, for the purposes of this Sublease, the word "Sublessor" shall be
substituted; where the word "Term" appears, for the purposes of this Sublease,
such word shall have the definition set forth in Part I hereof; and wherever the
word "Premises" for purposes of this Sublease, such word shall refer only to the
extent of the Premises sublet under this Sublease; and that upon the breach
beyond any applicable cure period of any of said terms, conditions or covenants
of the Master Lease by Sublessee or upon the failure of Sublessee to pay Monthly
Rent or any other amount comprising Rent or to comply with any of the provisions
of this Sublease, Sublessor may exercise any and all applicable rights and
remedies granted to Master Lessor by the Master Lease. In the event of any
conflict between this Sublease and the Master Lease, the terms of this Sublease
shall control. Sublessor shall use its good faith best efforts to maintain the
Master Lease in full force and effect during the term of this Sublease;
provided, however, that Sublessor shall not be liable to Sublessee for any
default or failure by Master Lessor, or any earlier termination of the Master
Lease that is not due to the fault of the Sublessor. Whenever the provisions of

                                      -4-

<PAGE>

the Master Lease incorporated as provisions of this Sublease require the written
consent of Master Lessor, said provisions shall be construed to require the
written consent of both Master Lessor and Sublessor; provided, that Sublessor
shall have ten (10) business days from the date of Sublessor's receipt of
Sublessee's request to respond in writing to such request and if Sublessor fails
to do so within said ten (10) business day period, Sublessor shall be deemed to
have approved of Sublessee's request. Sublessee hereby acknowledges that it has
read and is familiar with all the terms of the Master Lease, and agrees that
this Sublease is subordinate and subject to the Master Lease and that any
termination thereof may likewise terminate this Sublease and any obligation
whatsoever of Master Lessor to provide the Premises to Sublessee. Upon the
expiration of the term of the Master Lease, the Term of the Sublease shall also
expire and Sublessee shall no longer have the right to possession of the
Premises. Sublessor agrees to maintain the Master Lease in force during the
entire term of this Sublease not to enter into any amendment to the Master Lease
that will diminish Sublessee's rights or increase its obligations under this
Sublease, and to pay rent to Master Lessor in accordance with the terms of the
Master Lease, subject however, to any early termination of the Master Lease as
expressly provided therein without the default of Sublessor. Sublessee shall
comply with the Master Lease, all applicable laws, and any other covenants,
conditions and restrictions affecting the Building.

                  b. EXCLUSIONS. The terms and provisions of the following
Paragraphs and portions of the Master Lease are not incorporated into this
Sublease: Section 4 as it pertains to the amount of Base Rent; Section 5 as it
pertains to the amount of the Security Deposit and Section 6 as it pertains to
the amount of Operating Expenses.

                  c. TIME FOR NOTICE. The time limits provided for in the
provisions of the Master Lease for the giving of notice, making of demands,
performance of any act, condition or covenant, or the exercise of any right,
remedy or option, are amended for the purposes of this Sublease by lengthening
or shortening the same in each instance by three (3) business days, as
appropriate, so that notices may be given, demands made, or any act, condition
or covenant performed, or any right, remedy or option hereunder exercised, by
Sublessor or Sublessee, as the case may be within the time limit relating
thereto contained in the Master Lease. If the Master Lease allows only five (5)
days or less for Sublessor to perform any act, or to undertake to perform such
act, or to correct any failure relating to the Premises or this Sublease, then
Sublessee shall nevertheless be allowed five (5) days to perform such act,
undertake such act and/or correct such failure. Provided, however, that if
Sublessee has commenced to cure a nonmonetary default within any cure or notice
periods that the Master Lease allows and is diligently pursuing such cure,
Sublessee shall be provided with such additional time as is reasonably necessary
to complete such cure if, due to the nature of the breach, the cure cannot be
completed within the express time period granted herein and Master Lessor agrees
to such additional time.

         4. MASTER LESSOR'S OBLIGATIONS. It shall be the obligation of Master
Lessor to (i) provide all services to be provided by Master Lessor to Sublessor
under the terms of the Master Lease and (ii) to satisfy all obligations and
covenants of Master Lessor made to Sublessor in the Master Lease. Sublessee
acknowledges that Sublessor shall be under no obligation to provide such
services or satisfy any such obligations or covenants (including, without
limitation, to make any repairs or replacements to the Premises); provided,
however, Sublessor, upon written notice by Sublessee, shall diligently attempt
to enforce all obligations of Master Lessor under the Master Lease for the
benefit of Sublessee.

                                      -5-

<PAGE>

         5. RENT.

                  a. MONTHLY RENT. Sublessee shall pay to Sublessor as Monthly
Rent as set forth in the Basic Sublease Information, hereinabove, and other
monetary obligations of Sublessee to Sublessor under the terms of this Sublease,
in advance on the first day of each month of the Term, commencing on the Rent
Commencement Date. In the event the Rent Commencement Date is not the first day
of a calendar month or the last day of a rent period or the last day of the Term
is not the last day of the calendar month, the Monthly Rent shall be
appropriately prorated based on the actual number of days in the partial month.
All installments of Monthly Rent shall be paid in lawful money of the United
States and without deduction or offset for any cause whatsoever, but subject to
any abatement of rent granted under the Master Lease to Sublessor to the extent
applicable to the Premises. On the Effective Date, Sublessee shall pay to
Sublessor one installment of Monthly Rent to be applied by Sublessor to the
payment of Monthly Rent for the first month's rent due hereunder.

                  b. ADDITIONAL RENT. Sublessee's Proportionate Share of
Sublessor's Proportionate Share as set forth in the Basic Sublease Information,
hereinabove, and the rent for the Storage Space described in Section 15 below
shall be considered "Additional Rent." Additional Rent shall also include
expenses or charges applicable to the Premises, which may be imposed, at any
time, on Sublessor pursuant to the Master Lease (expressly excluding any late
charges, interest or damages or other charges or penalties imposed on Sublessor
due to its negligence, willful misconduct, default or delay beyond any
applicable grace period pursuant to the terms of the Master Lease) as described
in the Master Lease or incurred by Sublessor in compliance with the Master
Lease. As herein used, "Rent" shall include Monthly Rent and Additional Rent to
be paid by Sublessee pursuant to this Section 5.b. The payments of Additional
Rent required of Sublessee pursuant to this Section shall be made within the
same time periods after notice from Sublessor of the amount owed as are
established by the Master Lease for the comparable obligation of Sublessor to
make such payments to Master Lessor, or if not so provided therein, within ten
(10) days of written notice from Sublessor. Notwithstanding the foregoing,
Sublessee's Additional Rent will be payable in the same time and manner as
required by the Master Lease. Overpayments and underpayments of Additional Rent
shall be handled in the same manner as provided in the Master Lease; provided,
however that overpayments and underpayments shall be reconciled by Sublessor
within ten (10) days after the Expiration Date. Any overpayment by Sublessee
shall be refunded to Sublessee within five (5) business days after the
reconciliation, as long as Sublessee is not otherwise in default of its
obligations hereunder. Any underpayment shall be deducted from Sublessee's
Security Deposit and any shortage shall be paid by Sublessee within five (5)
business days after Sublessee's receipt of the reconciliation. Sublessor shall
promptly provide Sublessee with copies of all relevant estimates and statements
prepared by Master Lessor with respect to Additional Rent.

                  c. SECURITY DEPOSIT. Upon execution hereof, Sublessee shall
pay to Sublessor the sum set forth in the Basic Sublease Information,
hereinabove, as a security deposit, to be handled pursuant to Section 5 of the
Master Lease.

         6. REPAIRS AND MAINTENANCE. Except as provided in Section 9 below,
Sublessee acknowledges that Sublessor is under no duty to make repairs,
replacements or improvements or provide utilities or other like services to the
Premises, including, without limitation, any repairs necessitated by damage or
destruction to the Premises or other services addressed in the Master Lease; and

                                      -6-

<PAGE>

Sublessee hereby waives any right it may have at law or in equity to enforce the
same against Sublessor. Notwithstanding the foregoing, to the extent Master
Lessor is obligated under the Master Lease to make any repairs or replacements
in or to the Premises, Sublessor, upon written notice from Sublessee, shall
diligently attempt to enforce such obligations of Master Lessor.

         7. ALTERATIONS. Sublessee shall not make or suffer to be made any
Alterations to the Premises except with the prior written consent of Sublessor,
which consent shall not be unreasonably withheld or delayed, and of Master
Lessor. Master Lessor and/or Sublessor may require any Alteration installed by
Sublessor to be removed at the end of the term of this Sublease and the Premises
must be restored to its condition existing prior to the installation of such
Alteration by Sublessee (except to the extent of the Tenant Improvements
described in Exhibit B).

         8. COMMENCEMENT DATE/RENT COMMENCEMENT DATE/POSSESSION. This Sublease
shall commence on the date Possession of the Premises is delivered to Sublessee.
Possession shall be delivered to Sublessee upon completion of the Tenant
Improvements, which is estimated to occur on or before October 23, 2002.
Sublessee and Sublessor shall execute a letter confirming the Commencement Date
within ten days after Possession is delivered. Sublessee's obligation to pay
rent, however, shall commence fourteen (14) days after Sublessor delivers
Possession and Sublessee deposits with Sublessor the first month's Base Rent,
Sublessee's Proportionate Share of Operating Expenses, Sublessee's first month's
rent for the Storage Space described in Section 15 below and the Security
Deposit, and delivers the certificates of insurance required under Section 13
below. Delivery of early Possession is intended for provide Sublessor two (2)
weeks of free rent for the purposes of space planning, identifying its needs for
use and occupancy of the Premises, and to install items that are pertinent to
Sublessee's business, including, but not limited to, cabling, telephone systems,
furniture partitions, security systems and the like ("Sublessee's
Pre-Commencement Alterations").

         9. TENANT IMPROVEMENTS. Sublessor shall be responsible for causing the
completion of the Tenant Improvements at no cost or charge to Sublessee.
Sublessor shall be responsible for complying with the American with Disabilities
Act and similar state laws, to the extent applicable, in connection making such
Tenant Improvements and otherwise during the term of Sublease, unless compliance
with such laws is required as a result any alteration to the Premises caused by
Sublessee. Sublessor shall be responsible for restoration of the Premises to
their pre-Sublease condition to the extent of the Tenant Improvements. Sublessor
warrants that as of the Commencement Date and continuing through December 31,
2002, the mechanical, HVAC, electrical and plumbing systems shall be in good
operating condition and repair. Thereafter, Sublessee shall be responsible for
maintaining such systems in good operating condition and repair for the
remainder of the Term in accordance with Section 11 of the Master Lease.
Sublessee shall be responsible for all other repair obligations under Section 11
of the Master Lease from the date Sublessee gains access to the Premises and
commences Sublessee's Pre-Commencement Alterations.

                                      -7-

<PAGE>

         10. ASSIGNMENT AND SUBLETTING. Sublessee may assign, encumber or
otherwise transfer this Sublease or sublease the Premises so long as Sublessee
complies with the terms and conditions contained in the Master Lease and obtains
the prior written consent of Sublessor, which consent shall not be unreasonably
withheld.

         11. DAMAGE AND DESTRUCTION.

                  a. TERMINATION OF MASTER LEASE. If the Premises are damaged or
destroyed and Master Lessor exercises any option it may have to terminate the
Master Lease, if any, all as more particularly described in the Master Lease,
this Sublease shall terminate as of the date of the termination of the Master
Lease.

                  b. CONTINUATION OF SUBLEASE. If the Master Lease is not
terminated following any damage or destruction as provided above, this Sublease
shall remain in full force and effect, subject to an abatement of Rent as
provided by the terms of the Master Lease incorporated herein to the extent
applicable to the Premises.

         12. EMINENT DOMAIN. If any portion of the Premises sublet under this
Sublease or of the Premises let under the Master Lease is condemned by eminent
domain, inversely condemned or sold in lieu of condemnation, for any public or a
quasi-public use or purpose ("Condemned" or "Condemnation"), and Master Lessor
exercises any option to terminate the Master Lease, this Sublease shall
automatically terminate as of the date of the termination of the Master Lease.
If the Sublessor has the option to terminate the Master Lease and Sublessor
wishes to terminate the Master Lease, Sublessor may exercise such option,
without liability to Sublessee. If this Sublease is not terminated or the
parties agree to an assignment of the Master Lease to Sublessee following any
such Condemnation, this Sublease shall remain in full force and effect, subject
to the provisions of the Master Lease.

         13. INSURANCE. All liability insurance policies Sublessee is required
to carry shall contain a provision whereby Sublessor and Master Lessor are each
named as additional insureds under such policies. The liability policies shall
include coverage for contractual liability, shall provide for severability of
interests and shall provide that an act or omission of one of the named insureds
shall not void coverage to the other named insureds. The policies shall afford
coverage on an occurrence basis and shall otherwise meet all of the requirements
under Section 9 of the Master Lease. Prior to commencing Sublessee's
Pre-Commencement Alterations, Sublessee shall provide a certificate or
certificates of insurance evidencing the coverage herein required. Sublessor
shall not be obligated to carry any insurance required of the Master Lessor
under the Master Lease. Sublessor and Sublessee hereby mutually waive all claims
they or anyone claiming through them might have which arise in connection with
any damages suffered as a result of a casualty to the Premises to the extent
that such claim or claims are covered by all-risk casualty insurance carried
pursuant hereto. The waiver of subrogation provided in the Master Lease shall be
deemed a three-party agreement binding among and inuring to the benefit of
Sublessor, Sublessee and Master Lessor (by reason of its consent hereto).

         14. SIGNAGE. Sublessee, at its sole cost and expense, shall observe and
abide by the Master Lease pertaining to the installation, maintenance and
removal of signage during the term of its occupancy. Sublessor shall remove all
of its personal signage at Sublessor's sole cost and expense. Sublessee shall
install and remove its signage at Sublessee's sole cost and expense.

                                      -8-

<PAGE>

         15. STORAGE SPACE. Sublessor shall provide to Sublessee approximately
two thousand square feet of storage space (the "Storage Space") at a cost of
Eight Hundred and No/100 Dollars ($800.00) per month, which shall be considered
Additional Rent hereunder with NO additional common area charges to be paid by
Sublessee. All provisions of this Sublease shall apply to Sublessee's rental of
the Storage Space, as applicable; provided, however, that Sublessee and
Sublessor shall each have the right to terminate Sublessee's right to the
Storage Space upon thirty (30) days prior written notice to the other party.

         16. MISCELLANEOUS.

                  a. ENTIRE AGREEMENT. This Sublease contains all of the
covenants, conditions and agreements between the parties concerning the
Premises, and shall supersede all prior correspondence, agreements and
understandings concerning the Premises, both oral and written. No addition or
modification of any term or provision of this Sublease shall be effective unless
set forth in writing and signed by both Sublessor and Sublessee.

                  b. MASTER LESSOR'S CONSENT. This Sublease is conditioned upon
Master Lessor's written approval of this Sublease, and upon execution hereof,
Sublessor shall use commercially reasonable efforts to obtain such consent as
promptly as possible, and Sublessee shall cooperate with Sublessor. If Master
Lessor refuses to consent to this Sublease or Sublessor cannot obtain such
consent by October 31, 2002, this Sublease may be terminated by either party
upon written notice and neither party shall have any continuing obligation to
the other with respect to the Premises. Upon such termination, Sublessor shall
promptly refund all monies previously paid by Sublessee to Sublessor pursuant
hereto and Sublessee shall remove all personal property and restore the Premises
to the extent of Sublessee's Pre-Commencement Alterations. Sublessee shall also
repair any damage caused by the removal of its personal property and the removal
of Sublessee's Pre-Commencement Alterations.

                  c. AUTHORITY. Each person executing this Sublease on behalf of
a party hereto represents and warrants that he or she is authorized and
empowered to do so and to thereby bind the party on whose behalf he or she is
signing.

                  d. ATTORNEY'S FEES. In the event either party shall bring any
action or proceeding for damages or for an alleged breach of any provision of
this Sublease to recover rents, or to enforce, protect or establish any right or
remedy hereunder, the prevailing party shall be entitled to recover reasonable
attorney's fees and court costs as part of such action or proceeding.

                  e. WAIVER OF JURY TRIAL. Sublessee and Sublessor each waive
trial by jury in any action or other proceeding (including counterclaims),
whether at law or equity, brought by Sublessee or Sublessor against the other on
matters arising out of or in any way related to or connected with this Sublease
or any transaction contemplated by, or the relationship between Sublessee and
Sublessor, or any action or inaction by any party under, this Sublease.

                                      -9-

<PAGE>

                  f. DEFINITIONS. All capitalized words used herein shall have
the meaning given each herein or, if not so defined, the meaning set forth in
the Master Lease.

                  g. BROKER. Sublessor shall pay a commission equivalent to six
percent (6%) of the total Base Rent (Premises) per month and of the first
month's rent for the Storage Space to Sublessee's broker identified in Part I of
this Sublease; provided, however, that this Sublease becomes effective and the
Master Lessor's consent is obtained. The parties hereto agree that no other
brokers or finders have been involved in the transaction described in this
Sublease and the parties hereby agree that in the event any other broker,
salesperson or other person makes any claim for any commission or finder's fee
based upon the sublease to Sublessee of the Premises or any other items or
interests contemplated by this Sublease, the parties through whom said broker,
salesperson or other person makes its claim shall indemnify and hold harmless
the other party from said claim and all liabilities, costs and expenses relating
thereto, including reasonable attorneys' fees, which may be incurred by such
other party in connection with such claim.

                  h. CONDITION UPON SURRENDER. At the expiration or earlier
termination of this Sublease, Sublessee shall be required to have the carpets
vacuumed and return the Premises in a broom-clean condition, vacant of
occupants. Sublessee shall remove all of Sublessee's personal property. Subject
to the terms of the Master Lease. Sublessee shall remove all Sublessee's
Alterations (including Sublessee's Pre-Commencement Alterations) and any other
alterations and/or improvements from the Premises and restore the Premises to
the condition existing as of the Effective Date of this Sublease, ordinary wear
and tear excepted and except to the extent of the Tenant Improvements
constructed by Sublessor. Sublessee shall repair any and all damage resulting
from the removal of said personal property and the removal of Sublessee's
Alterations and other alterations and/or improvements caused by Sublessee.

                  i. QUIET ENJOYMENT. Sublessor covenants that, as long as
Sublessee shall fulfill its obligations pursuant to this Sublease, Sublessee
shall and may peaceably an quietly have, hold and enjoy the Premises and all
parts thereof subject to the terms of this Sublease.

                  j. LIMITATION OF LIABILITY. In no event shall either party to
this Sublease be liable to the other under any theory of tort, contract, strict
liability or other legal or equitable theory for any lost profits (excluding
rent or damages for rent payable hereunder), exemplary, punitive, special,
incidental, indirect or consequential damages, each of which is hereby excluded
by agreement or the parties regardless of whether or not any party has been
advised of the possibility of such damages.

                  k. HAZARDOUS MATERIALS INDEMNITY. Without limiting in any way
Sublessee's obligations under any other provision of this Sublease and the
Master Lease, Sublessee and its successors and assigns shall indemnify, protect,
defend (with counsel approved by Sublessor) and hold Sublessor, its partners,
officers, directors, shareholders, employees, agents, lenders, contractors and
each of their respective successors and assigns (the "Sublessor Indemnified
Parties") harmless from any and all claims, damages, liabilities, losses, costs
and expenses of any nature whatsoever, known or unknown, contingent or otherwise
(including, without limitation, attorneys' fees, litigation, arbitration and
administrative proceedings costs, expert and consultant fees and laboratory
costs, as well as damages arising out of the diminution in the value of the
Premises or any portion thereof, damages for the loss of the Premises, damages

                                      -10-

<PAGE>

arising from any adverse impact on the marketing of space in the Premises, and
sums paid in settlement of claims) (collectively "Claims"), which arise during
or after the Term in whole or in part as a result of the presence of any
hazardous or toxic materials, in, on, under, from or about the Premises caused
by Sublessee, its agents, employees or contractors, unless such Claims arise out
of or are caused by any of the Sublessor Indemnified Parties. Without limiting
in any way Sublessor's obligations under any other provision of this Sublease
and Master Lease, as amended, Sublessor and its successors and assigns shall
indemnify, protect, defend (with counsel approved by Sublessee) and hold
Sublessee, and its partners, officers, directors, shareholders, employees,
agents, lenders, contractors and each of their respective successors and assigns
("Sublessee Indemnified Parties") harmless against all Claims if arising out of
or caused by the Sublessor, its agents, employees or contractors, unless such
Claims arise out of or are caused by any of the Sublessee Indemnified Parties.
The indemnities contained herein shall survive the expiration or earlier
termination of this Sublease.

                  l. NOTICES. Any notice which is required or permitted to be
given by either party under this Sublease shall be in writing and must be given
only by certified mail, return receipt requested, by hand delivery or by
nationally recognized overnight courier service at the addresses set forth
above. Each party shall further use reasonable efforts to provide the other
party with a courtesy copy of any notice by fax and by electronic mail. Any such
notice shall be deemed given on the earlier of two (2) business days after the
date sent in accordance with one of the permitted methods described above or the
date of actual receipt thereof, provided that receipt of notice solely by fax or
electronic mail shall not be deemed to be delivery of notice hereunder. The time
period for responding to any such notice shall begin on the date the notice is
actually received, but refusal to accept delivery or inability to accomplish
delivery because the party can no longer be found at the then current notice
address, shall be deemed receipt. Either party may change its notice address by
providing written notice to the other party in accordance with the terns herein.

                                      -11-

<PAGE>

         IN WITNESS WHEREOF, the parties hereto have executed one (1) or more
copies of this Sublease, effective as of the Consent Date.

                                                     "Sublessor"

                                                     NOVELLUS SYSTEMS, INC.,
                                                     a California corporation

                                                     By:      /S/ KEVIN ROYAL
                                                        ------------------------
                                                          Name:  Kevin Royal
                                                          Its:  CFO

                                                     "Sublessee"

                                                     CXR Telcom Corporation
                                                     a Delaware corporation

                                                     By:      /S/ RANDOLPH FOOTE
                                                        ------------------------
                                                          Name:  Randolph Foote
                                                          Its:  VP & CFO

                                                     By:
                                                        ------------------------
                                                          Name:
                                                          Its:

                                      -12-

<PAGE>

                                    EXHIBIT A

                             Floor Plan of Premises

                            ________________________

                                    EXHIBIT B

                            Tenant Improvements List

                            ________________________

                                    EXHIBIT C

                                  Master Lease

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