EXHIBIT 10.8

 
                                LEASE AGREEMENT



     THIS LEASE, made this 31st day of July , 1995 between JOHN ARRILLAGA,
Trustee, or his Successor Trustee, UTA dated 7/20/77 (ARRILLAGA FAMILY TRUST) as
amended, and RICHARD T. PEERY, Trustee, or his Successor Trustee, UTA dated
7/20/77 (RICHARD T. PEERY SEPARATE PROPERTY TRUST) as amended , hereinafter
called Landlord, and LATITUDE COMMUNICATIONS a California corporation,
hereinafter called Tenant.

                                  WITNESSETH:


   Landlord hereby leases to Tenant and Tenant hereby hires and takes from
 Landlord those certain premises (the "Premises") outlined in red on Exhibit
 "A", attached hereto and incorporated herein by this reference thereto more
 particularly described as follows:

A portion of that certain 51,200+ square foot, two-story building located at
2121 Tasman Drive, Santa Clara,. California 95054, consisting of approximately
39,157+ square feet of space. Said Premises is more particularly shown within
the area outlined in Red on Exhibit A. The entire parcel, of which the Premises
                            ----------
is a part, is shown within the area outlined in Green on Exhibit A attached
                                                         ---------
hereto. The Premises is leased on an "as-is" basis, and in the improved
configuration as shown in Red on Exhibit B to be attached hereto.
                                 ---------


As used herein the Complex shall mean and include all of the land outlined in
Green and described in Exhibit "A", attached hereto, and all of the buildings,
improvements, fixtures and equipment now or hereafter situated on said land.

    Said letting and hiring is upon and subject to the terms, covenants and
conditions hereinafter set forth and Tenant covenants as a material part of the
consideration for this Lease to perform and observe each and all of said terms,
covenants and conditions. This Lease is made upon the conditions of such
performance and observance.

1.  USE  Tenant shall use the Premises only in conformance with applicable
governmental laws, regulations, rules and ordinances for the purpose of general
office, light manufacturing, research and development, and storage and other
uses necessary for Tenant to conduct Tenant's business, provided that such uses
shall be in accordance with all applicable governmental laws and ordinances and
for no other purpose. Tenant shall not do or permit to be done in or about the
Premises or the Complex nor bring or keep or permit to be brought or kept in or
about the Premises or the Complex anything which is prohibited by or will in any
way increase the existing rate of (or otherwise affect) fire or any insurance
coveting the Complex or any part thereof, or any of its contents, or will cause
a cancellation of any insurance covering the Complex or any part thereof, or any
of its contents. Tenant shall not do or permit to be done anything in, on or
about the' Premises or the Complex which will in any way obstruct or interfere
with the rights of other tenants or occupants of the Complex or injure or annoy
them, or use or allow the Premises to be used for any improper, immoral,
unlawful or objectionable purpose, nor shall Tenant cause, maintain or permit
any nuisance in, on or about the Premises or the Complex. No sale by auction
shall be permitted on the Premises. Tenant shall not place any loads upon the
floors, walls, or ceiling, which endanger the structure, or place any harmful
fluids or other materials in the drainage system of the building, or overload
existing electrical or other mechanical systems. No waste materials or refuse
shall be dumped upon or permitted to remain upon any part of the Premises or
outside of the building in which the Premises are a part, except in trash
containers placed inside exterior enclosures designated by Landlord for that
purpose or inside of the building proper where designated by Landlord. No
materials, supplies, equipment, finished products or semi-finished products, raw
materials or articles of any nature shall be stored upon or permitted to remain
outside the Premises or on any portion of common area of the Complex. No
loudspeaker or other device, system or apparatus which can be heard outside the
Premises shall be used in or at the Premises without the prior written consent
of Landlord. Tenant shall not commit or suffer to be committed any waste in or
upon the Premises. Tenant shall indemnify, defend and hold Landlord harmless
against any loss. expense, damage, attorneys' fees, or liability arising out of
failure of Tenant to comply with any applicable law. Tenant shall comply with
any covenant, condition, or restriction ("CC&R's") affecting the Premises. The
provisions of this paragraph are for the benefit of Landlord only and shall not
be construed to be for the benefit of any tenant or occupant of the Complex.

2. TERM *

  A. The term of this Lease shall be for a period of FIVE (5) years (unless
sooner terminated as hereinafter provided) and, subject to Paragraphs 2(B) and
3, shall commence on the 1st day of January , 1996 and end on the 31st day
December, of 2000.

  B. Possession of the Premises shall be deemed tendered and the term of this
Lease shall commence when the first of the following occurs:

     (a) One day after a Certificate of Occupancy is granted by the proper
governmental agency, or, if the governmental agency having jurisdiction over the
area in which the Premises are situated does not issue certificates of
occupancy, then the same number of days after certification by Landlord's
architect or contractor that Landlord's construction work has been completed; or

     (b) Upon the occupancy of the Premises by any of Tenant's operating
personnel; or

     (c) When the Tenant Improvements have been substantially completed for
Tenant's use and occupancy, in accordance and compliance with Exhibit B of this
Lease Agreement; Notwithstanding anything to the contrary herein, it is agreed
by the parties hereto, that said Lease shall not commence prior to January 1,
1996 unless any of Tenant's operating personnel occupy any part of the Premises
prior to January 1, 1996; or

     (d) As otherwise agreed in writing.


3. POSSESSION If Landlord, for any reason whatsoever, cannot deliver possession
of said premises to Tenant at the commencement of the said term, as hereinbefore
specified, this Lease shall not be void or voidable; no obligation of Tenant
shall be affected thereby nor shall Landlord or Landlord's agents be liable to
Tenant for any loss or damage resulting therefrom; but in that event the
commencement and termination dates of the Lease, and all other dates affected
thereby shall be revised to conform to the date of Landlord's delivery of
possession, as specified in Paragraph 2 (b), above. The above is, however,
subject to the provision that the period of delay, of delivery of the premises
shall not exceed 60 days from the commencement date herein (except those delays
caused by Acts of God, strikes, war, utilities, governmental bodies, weather,
unavailable materials, and delays beyond Landlord's control shall be excluded in
calculating such period) in which instance Tenant, at its option, may, by
written notice to Landlord, terminate this Lease.

* It is agreed in the event said Lease commences on a date other than the first
day of the month the term of the Lease will be extended to account for the
number of days in the partial month. The Basic Rent during the resulting partial
month will be pro-rated (for the number of days in the partial month) at the
Basic Rent scheduled for the projected commencement date as shown in Paragraph
43.

                                  page 1 of 8

 
  4. RENT

  A. Basic Rent. Tenant agrees to pay to Landlord at such place as Landlord may
designate without deduction, offset, prior notice, or demand, and Landlord
agrees to accept as Basic Rent for the leased Premises the total sum of TWO
MILLION TWO HUNDRED THIRTY ONE THOUSAND NINE HUNDRED FORTY NINE AND NO/100
($2,231,949.00) Dollars in lawful money of the United States of America, payable
as follows:

  See Paragraph 43 for Basic Rent Schedule.

  B. Time for Payment. In the event that the term of this Lease commences on a
date other than the first day of a calendar month, on the date of commencement
of the term hereof Tenant shall pay to Landlord as rent for the period from such
date of commencement to the first day of the next succeeding calendar month that
proportion of the monthly rent hereunder which the number of days between such
date of commencement and the first day of the next succeeding calendar month
bears to thirty (30). In the event that the term of this Lease for any reason
ends on a date other than the last day of a calendar month, on the first day of
the last calendar month of the term hereof Tenant shall pay to Landlord as rent
for the period from said first day of said last calendar month to and including
the last day of the term hereof that proportion of the monthly rent hereunder
which the number of days between said first day of said last calendar month and
the last day of the term hereof bears to thirty (30).

  C. Late Charge. Notwithstanding any other provision of this Lease, if Tenant
is in default in the payment of rental as set forth in this Paragraph 4 when
due, or any part thereof, Tenant agrees to pay Landlord, in addition to the
delinquent rental due, a late charge for each rental payment in default ten (10)
days. Said late charge shall equal ten (10%) percent of each rental payment so
in default.

  D. Additional Rent. Beginning with the commencement date of the term of this
Lease, Tenant shall pay to Landlord in addition to the Basic Rent and as
Additional Rent following:

 (a) Tenant's proportionate share of all Taxes relating to the Complex as set
     forth in Paragraph 12, and

 (b) Tenant's proportionate share of all insurance premiums relating to the
     Complex, as set forth in Paragraph 15, and

 (c) Tenant's proportionate share of expenses for the operation, management,
     maintenance and repair of the Building (including common areas of the
     Building) and common Areas of the Complex in which the Premises are located
     as set forth in Paragraph 7, and

 (d) All charges, costs and expenses, which Tenant is required to pay hereunder,
     together with all interest and penalties, costs and expenses including
     attorneys' fees and legal expenses, that may accrue thereto in the event of
     Tenant's failure to pay such amounts, and all damages, reasonable costs and
     expenses which Landlord may incur by reason of default of Tenant or failure
     on Tenant's part to comply with the terms of this Lease. In the event of
     nonpayment by Tenant of Additional Rent, Landlord shall have all the rights
     and remedies with respect thereto as Landlord has for nonpayment of rent.

The Additional Rent due hereunder shall be paid to Landlord or Landlord's agent
(i) within five days for taxes and insurance and within thirty (30) days for all
other Additional Rent items after presentation of invoice from Landlord or
Landlord's agent setting forth such Additional Rent and/or (ii) at the option of
Landlord, Tenant shall pay to Landlord monthly, in advance, Tenant's prorata
share of an amount estimated by Landlord to be Landlord's approximate average
monthly expenditure for such Additional Rent items, which estimated amount shall
be reconciled within 120 days of the end of each calendar year or more
frequently if Landlord so elects to do so at Landlord's sole and absolute
discretion, as compared to Landlord's actual expenditure for said Additional
Rent items, with Tenant paying to Landlord, upon demand, any amount of actual
expenses expended by Landlord in excess of said estimated amount, or Landlord
refunding to Tenant (providing Tenant is not in default in the performance of
any of the terms, covenants and conditions of this Lease) any amount of
estimated payments made by Tenant in excess of Landlord's actual expenditures
for said Additional Rent items.

  The respective obligations of Landlord and Tenant under this paragraph shall
survive the expiration or other termination of the term of this Lease, and if
the term hereof shall expire or shall otherwise terminate on a day other than
the last day of a calendar year, the actual Additional Rent incurred for the
calendar year in which the term hereof expires or otherwise terminates shall be
determined and settled on the basis of the statement of actual Additional Rent
for such calendar year and shall be prorated in the proportion which the number
of days in such calendar year preceding such expiration or termination bears to
365. Within thirty (30) days after receipt of Landlord's reconciliation, Tenant
shall have the right, at Tenant's sole expense, to audit, at a mutually
convenient time at Landlord's office, Landlord's records relating to the
foregoing expenses. Such audit must be conducted by Tenant or an independent
nationally recognized accounting firm that is not being compensated by Tenant or
other third party on a contingency fee basis. If such audit reveals that
Landlord has overcharged Tenant, the amount overcharged shall be credited to
Tenant's account within thirty (30) days after the audit is concluded.

  E. Place of Payment of Rent and Additional Rent. All Basic Rent hereunder and
all payments hereunder for Additional Rent shall be paid to Landlord at the
office of Landlord at Peery/Arrillaga, File 1504, Box 60000: San Francisco, CA
94160 or to such other person or to such other place as Landlord may from time
to time designate in writing.

*  F. Security Deposit. Subject to Paragraph 50, concurrently with Tenant's
execution of this Lease, Tenant shall deposit with Landlord the sum of EIGHTY
TWO THOUSAND TWO HUNDRED TWENTY NINE AND 70/100 ($82,229.70) Dollars. Said sum
shall be held by Landlord as a Security Deposit for the faithful performance by
Tenant of all of the terms, covenants, and conditions of this Lease to be kept
and performed by Tenant during the term hereof. If Tenant defaults with respect
to any provision of this Lease, including, but not limited to, the provisions
relating to the payment of rent and any of the monetary sums due herewith.
Landlord may (but shall not be required to) use, apply or retain all or any part
of this Security Deposit for thc payment of any other amount which Landlord may
spend by reason of Tenant's default or to compensate Landlord for any other loss
or damage which Landlord may suffer by reason of Tenant's default. If any
portion of said Deposit is so used or applied, Tenant shall, within ten (10)
days after written demand therefor, deposit cash with Landlord in the amount
sufficient to restore the Security Deposit to its original amount. Tenant's
failure to do so shall be a material breach of this Lease. Landlord shall not be
required to keep this Security Deposit separate from its general funds, and
Tenant shall not be entitled to interest on such Deposit. If Tenant fully and
faithfully performs every provision of this Lease to be performed by it. the
Security Deposit or any balance thereof shall be returned to Tenant (or at
Landlord's option, to the last assignee of Tenant's interest hereunder) at the
expiration of the Lease term and after Tenant has vacated the Premises. In the
event of termination of Landlord's interest in this Lease. Landlord shall
transfer said Deposit to Landlord's successor in interest whereupon Tenant
agrees to release Landlord from liability for the return of such Deposit or the
accounting therefor.

5. RULES AND REGULATIONS AND COMMON AREA   Subject to the terms and conditions
of this Lease and such Rules and Regulations as Landlord may from time to time
prescribe, Tenant and Tenant's employees, invitees and customers shall, in
common with other occupants of the Complex in which the Premises are located,
and their respective employees, invitees and customers, and others entitled to
the use thereof, have the non-exclusive right to use the access roads, parking
areas, and facilities provided and designated by Landlord for the general use
and convenience of the occupants of the Complex in which the Premises are
located, which areas and facilities are referred to herein as "Common Area".
This right shall terminate upon the termination of this Lease. Landlord reserves
the right from time to time to make changes in the shape, size, location, amount
and extent of Common Area. Landlord further reserves the right to promulgate
such reasonable rules and regulations relating to the use of the Common Area,
and any part or parts thereof, as Landlord may deem appropriate for the best
interests of the occupants of the Complex. The Rules and Regulations shall be
binding upon Tenant upon delivery of a copy of them to Tenant, and Tenant shall
abide by them and cooperate in their observance. Such Rules and Regulations may
be amended by Landlord from time to time, with or without advance notice, and
all amendments shall be effective upon delivery of a copy to Tenant. Landlord
shall not be responsible to Tenant for the non-performance by any other tenant
or occupant of the Complex of any of said Rules and Regulations.

  Landlord shall operate, manage and maintain the Common Area. The manner in
which the Common Area shall be maintained and the expenditures for such
maintenance shall be at the discretion of Landlord.

* $41,114.85 due upon Lease execution.

  $41,114.85 Promissory Note due January 1, 1997.

                                  page 2 of 8

 
6. PARKING Tenant shall have the right to use with other tenants or occupants of
the Complex 144 parking spaces in the common parking areas of the Complex.
Tenant agrees, that Tenant, Tenant's employees, agents, representatives and/or
invitees shall not use parking spaces in excess of said 144 spaces allocated to
Tenant hereunder. Landlord shall have the right, at Landlord's sole discretion,
to specifically designate the location of Tenant's parking spaces within the
common parking areas of the Complex in the event of a dispute among the tenants
occupying the building and/or Complex referred to herein, in which event Tenant
agrees that Tenant, Tenant's employees, agents, representatives and/or invitees
shall not use any parking spaces other than those parking spaces specifically
designated by Landlord for Tenant's use. Said parking spaces, if specifically
designated by Landlord to Tenant, may be relocated by Landlord at any time, and
from time to time. Landlord reserves the right, at Landlord's sole discretion,
to rescind any specific designation of parking spaces, thereby returning
Tenant's parking spaces to the common parking area. Landlord shall give Tenant
written notice of any change in Tenant's parking spaces. Tenant shall not, at
any time, park, or permit to be parked, any trucks or vehicles adjacent to the
loading areas so as to interfere in any way with the use of such areas, nor
shall Tenant at any time park. or permit the parking of Tenant's trucks or other
vehicles or the trucks and vehicles of Tenant's suppliers or others, in any
portion of the common area not designated by Landlord for such use by Tenant.
Tenant shall not park nor permit to be parked, any inoperative vehicles or
equipment on any portion of the common parking area or other common areas of the
Complex. Tenant agrees to assume responsibility for compliance by its employees
with the parking provision contained herein. If Tenant or its employees park in
other than such designated parking areas, then Landlord may charge Tenant, as an
additional charge, and Tenant agrees to pay, ten ($10.00) Dollars per day for
each day or partial day each such vehicle is parked in any area other than that
designated. Tenant hereby authorizes Landlord at Tenant's sole expense to tow
away from the Complex any vehicle belonging to Tenant or Tenant's employees
parked in violation of these provisions, or to attach violation stickers or
notices to such vehicles. Tenant shall use the parking areas for vehicle parking
only, and shall not use the parking areas for storage.

7. EXPENSES OF OPERATION, MANAGEMENT, AND MAINTENANCE OF THE COMMON AREAS OF THE
COMPLEX AND BUILDING IN WHICH THE PREMISES ARE LOCATED As Additional Rent and in
accordance with Paragraph 4 D of this Lease, Tenant shall pay to Landlord
Tenant's proportionate share (calculated on a square footage or other equitable
basis as calculated by Landlord) of all expenses of operation, management,
maintenance and repair of the Common Areas of the Complex including, but not
limited to, license, permit, and inspection fees; security: utility charges
associated with exterior landscaping and lighting (including water and sewer
charges): all charges incurred in the maintenance of landscaped areas, lakes,
parking lots. sidewalks, driveways: maintenance, repair and replacement of all
fixtures and electrical, mechanical, and plumbing systems: structural elements
and exterior surfaces of the buildings; salaries and employee benefits of
personnel and payroll taxes applicable thereto; supplies, materials, equipment
and tools; the cost of capital expenditures which have the effect of reducing
operating expenses, provided, however, that in the event Landlord makes such
capital improvements, Landlord shall amortize its investment in said
improvements (together with interest at the rate of fifteen (15%) percent per
annum on the unamortized balance) as an operating expense in accordance with
standard accounting practices, provided, that such amortization is not at a rate
greater than the anticipated savings in the operating expenses.

  "Additional Rent" as used herein shall not include Landlord's debt repayments;
interest on charges: expenses directly or indirectly incurred by Landlord for
the benefit of any other tenant; cost for the installation of partitioning or
any other tenant improvements; cost of attracting tenants; depreciation;
interest, or executive salaries.

  As Additional Rent and in accordance with paragraph 4 D of this Lease. Tenant
shall pay its proportionate share (calculated on a square footage or other
equitable basis as calculated by Landlord) of the cost of operation (including
common utilities), management, maintenance, and repair of the building
(including common areas such as lobbies, restrooms, janitor's closets, hallways,
elevators, mechanical and telephone rooms, stairwells, entrances, spaces above
the ceilings and janitorization of said common areas) in which the Premises are
located. The maintenance items herein referred to include, but are not limited
to, all windows, window frames, plate glass, glazing, truck doors, main plumbing
systems of the building (such as water and drain lines, sinks, toilets, faucets,
drains, showers and water, fountains), main electrical systems (such as panels
and conduits), heating and airconditioning systems (such as compressors, fans,
air handlers, ducts, boilers, heaters), store fronts, roofs. downspouts,
building common area interiors (such as wall coverings, window coverings, floor
coverings and partitioning), ceilings, building exterior doors, skylights (if
any), automatic fire extinguishing systems, and elevators: license, permit, and
inspection fees; security; salaries and employee benefits of personnel and
payroll taxes applicable thereto; supplies, materials, equipment and tools: the
cost of capital expenditures which have the effect of reducing operating
expenses, provided, however, that in the event Landlord makes such capital
improvements, Landlord shall amortize its investment in said improvements
(together with interest at the rate of fifteen (15%) percent per annum on the
unamortized balance) as an operating expense in accordance with standard
accounting practices, provided, that such amortization is not at a rate greater
than the anticipated savings in the operating expenses. Tenant hereby waives all
rights under, and benefits of, subsection 1 of Section 1932 and Sections 1941
and 1942 of the California Civil Code and under any similar law, statute or
ordinance now or hereafter in effect.

8. ACCEPTANCE AND SURRENDER OF PREMISES  By entry hereunder, Tenant accepts the
Premises as being in good and sanitary order, condition and repair and accepts
the building and improvements included in the Premises in their present
condition and without representation or warranty by Landlord as to the condition
of such building or as to the use or occupancy which may be made thereof. Any
exceptions to the foregoing must be by written agreement executed by Landlord
and Tenant. Tenant agrees on the last day of the Lease term, or on the sooner
termination of this Lease, to surrender the Premises promptly and peaceably to
Landlord in good condition and repair (damage by Acts of God, fire, normal wear
and tear excepted), with all interior walls painted, or cleaned so that they
appear freshly painted, and repaired and replaced, if damaged; all floors
cleaned and waxed; all carpets cleaned and shampooed; the airconditioning and
heating equipment serviced by a reputable and licensed service firm and in good
operating condition (provided the maintenance of such equipment has been
Tenant's responsibility during the term of this Lease) together with all
alterations, additions, and improvements which may have been made in, to, or on
the Premises (except movable trade fixtures installed at the expense of Tenant)
except that Tenant shall ascertain from Landlord within thirty (30) days before
the end of the term of this Lease whether Landlord desires to have the Premises
or any part or parts thereof restored to their condition and configuration as
when the Premises were delivered to Tenant and if Landlord shall so desire, then
Tenant shall restore said Premises or such part or parts thereof before the end
of this Lease at Tenant's sole cost and expense. Tenant, on or before the end of
the term or sooner termination of this Lease, shall remove all of Tenant's
personal property and trade fixtures from the Premises, and all property not so
removed on or before the end of the term or sooner termination of this Lease
shall be deemed abandoned by Tenant and title to same shall thereupon pass to
Landlord without compensation to Tenant. Landlord may, upon termination of this
Lease, remove all moveable furniture and equipment so abandoned by Tenant, at
Tenant's sole cost, and repair any damage caused by such removal at Tenant's
sole cost. If the Premises be not surrendered at the end of the term or sooner
termination of this Lease. Tenant shall indemnify Landlord against loss or
liability resulting from the delay by Tenant in so surrendering the Premises
including, without limitation, any claims made by any succeeding tenant founded
on such delay. Nothing contained herein shall be construed as an extension of
the term hereof or as a consent of Landlord to any holding over by Tenant. The
voluntary or other surrender of this Lease or the Premises by Tenant or a mutual
cancellation of this Lease shall not work as a merger and. at the option of
Landlord, shall either terminate all or any existing subleases or subtenancies
or operate as an assignment to Landlord of all or any such subleases or
subtenancies.

9. ALTERATIONS AND ADDITIONS  Tenant shall not make, or suffer to be made, any
alteration or addition to the Premises, or any part thereof, without the written
consent of Landlord first had and obtained by Tenant, but at the cost of Tenant,
and any addition to, or alteration of, the Premises, except moveable furniture
and trade fixtures, shall at once become a part of the Premises and belong to
Landlord, Landlord reserves the right to approve all contractors and mechanics
proposed by Tenant to make such alterations and additions. Tenant shall retain
title to all moveable furniture and trade fixtures placed in the Premises. All
heating, lighting, electrical, airconditioning, floor-to-ceiling partitioning,
drapery, carpeting, and floor installations made by Tenant, together with all
property that has become an integral part of the Premises, shall not be deemed
trade fixtures. Non-floor-to-ceiling cubicles shall be considered trade
fixtures. Tenant agrees that it will not proceed to make such alteration or
additions, without having obtained consent from Landlord to do so, and until
five (5) days from the receipt of such consent, in order that Landlord may post
appropriate notices to avoid any liability to contractors or material suppliers
for payment for Tenant's improvements. Tenant will at all times permit such
notices to be posted and to remain posted until the completion of work. Tenant
shall, if required by Landlord. secure at Tenant's own cost and expense, a
completion and lien indemnity bond, satisfactory to Landlord, for such work.
Tenant further covenants and agrees that any mechanic's lien filed against the
Premises or against the Complex for work claimed to have been done for, or
materials claimed to have been furnished to Tenant, will be discharged by
Tenant, by bond or otherwise, within ten (l0) days after the filing thereof, at
the cost and expense of Tenant. Any exceptions to the foregoing must he made in
writing and executed by both Landlord and Tenant.

10. TENANT MAINTENANCE.  Subject to paragraphs 54 and 55 Tenant shall, at its
sole cost and expense, keep and maintain the Premises (including appurtenances)
and every part thereof in a high standard of maintenance and repair, and in good
and sanitary condition. Tenant's maintenance and repair responsibilities herein
referred to include, but are not limited to, janitorization, plumbing systems
within the non-common areas of the Premises (such as water and drain lines,
sinks), electrical systems within the non-common areas of the Premises (such as
outlets, lighting fixtures, lamps, bulbs, tubes, ballasts), heating and
airconditioning controls within the non-common areas of the Premises (such as
mixing boxes, thermostats, time clocks, supply and return grills), all interior
improvements within the premises including but not limited to: wall coverings,
window coverings, acoustical ceilings, vinyl tile, carpeting, partitioning,
doors (both interior and exterior, including closing mechanisms, latches,
locks), and all other interior improvements of any nature whatsoever. Tenant
agrees to provide carpet shields under all rolling chairs or to otherwise be
responsible for wear and tear of the carpet caused by such rolling chairs if
such wear and tear exceeds that caused by normal foot traffic in surrounding
areas. Areas of excessive wear shall be replaced at Tenant's sole expense upon
Lease termination.

                                  page 3 of 8

 
11. UTILITIES OF THE BUILDING IN WHICH THE PREMISES ARE LOCATED  As Additional
Rent and in accordance with paragraph 4 D of this Lease. Tenant shall pay its
proportionate share (calculated on a square footage or other equitable basis as
calculated by Landlord) of the cost of all utility charges such as water, gas,
electricity, telephone, telex and other electronic communication, service, sewer
service, waste-pick-up and any other utilities, materials or services furnished
directly to the building in which the Premises are located, including, without
limitation, any temporary or permanent utility surcharge or other exactions
whether or not hereinafter imposed.

  Landlord shall not be liable for and Tenant shall not be entitled to any
abatement or reduction of rent by reason of any interruption or failure of
utility services to the Premises when such interruption or failure is caused by
accident, breakage, repair, strikes, lockouts, or other labor disturbances or
labor disputes of any nature, or by any other cause, similar or dissimilar,
beyond the reasonable control of Landlord.

  Provided that Tenant is not in default in the performance or observance of any
of the terms, covenants or conditions of this Lease to be performed or observed
by it. Landlord shall furnish to the Premises between the hours of 8:00AM and
6:00PM Mondays through Fridays (holidays excepted) and subject to the rules and
regulations of the Complex hereinbefore referred to, reasonable quantities of
water gas and electricity suitable for the intended use of the Premises and heat
and airconditioning required in Landlord's judgment for the comfortable use and
occupation of the Premises for such purposes. Tenant agrees that at all times it
will cooperate fully with Landlord and abide by all regulations and requirements
that Landlord may prescribe for the proper functioning and protection of the
building heating, ventilating and airconditioning systems. Whenever heat
generating machines, equipment or any other devices (including exhaust fans) are
used in the Premises by Tenant which affect the temperature or otherwise
maintained by the airconditioning system. Landlord shall have the right to
install supplementary airconditioning units in the Premises and the cost
thereof, including the cost of installation and the cost of operation and
maintenance thereof, shall be paid by Tenant to Landlord upon demand by
Landlord, Tenant will not, without the written consent of Landlord, use any
apparatus or device in the Premises (including, without limitation) electronic
data processing machines or machines using current in excess of 110 Volts which
will in any way increase the amount of electricity, gas, water or
airconditioning usually furnished or supplied to premises being used as general
office space, or connect with electric current (except through existing
electrical outlets in the Premises), or with gas or water pipes an apparatus or
device for the purposes of using electric current gas or water. If Tenant shall
require water, gas, or electric current in excess of that usually furnished or
supplied to premises being used as general office space, Tenant shall first
obtain the written consent of Landlord which consent shall not be unreasonably
withheld and Landlord may cause an electric current gas, or water meter to be
installed in the Premises in order to measure the amount of electric current,
gas or water consumed for any such excess use. The cost of any such meter and of
the installation, maintenance and repair thereof all charges for such excess
water, gas and electric current consumed (as shown by such meters and at the
rates then charged by the furnishing public utility): and any additional expense
incurred by Landlord in keeping account of electric current, gas or water so
consumed shall be paid by Tenant, and Tenant agrees to pay Landlord therefor
promptly upon demand by Landlord. Tenant may, from time to time, have its staff
and equipment operate on a twenty-four (24) hours-a-day seven (7) days-a-week
schedule, and Tenant shall pay for any extra utilities used by Tenant. Landlord
acknowledges that Tenant may use electrical current up to 220 volts subject to
the terms and conditions of this Paragraph 11.

12. TAXES. A. As Additional Rent and in accordance with Paragraph 4 D of this
Lease. Tenant shall pay to Landlord Tenant's proportionate share of all Real
Property Taxes. which prorata share shall be allocated to the leased Premises by
square footage or other equitable basis, as calculated by Landlord. The term
"Real Property Taxes", as used herein, shall mean (i) all taxes assessments,
levies and other charges of any kind or nature whatsoever, general and special,
foreseen and unforeseen (including all installments of principal and interest
required to pay any general or special assessments for public improvements and
any increases resulting from reassessments caused by any change in ownership of
the Complex) now or hereafter imposed by any governmental or quasi-governmental
authority or special district having the direct or indirect power to tax or levy
assessments, which are levied or assessed against, or with respect to the value,
occupancy or use of all or any portion of the Complex (as now constructed or as
may at any time hereafter be constructed, altered or otherwise changed) or
Landlord's interest therein: any improvements located within the Complex
(regardless of ownership): the fixtures, equipment and other property of
Landlord. real or personal, that are an integral part of and located in the
Complex; or parking areas, public utilities, or energy within the Complex; (ii)
all charges, levies or fees imposed by reason of environmental regulation or
other governmental control of the Complex; and (iii) all costs and fees
(including attorneys' fees) incurred by Landlord in contesting any Real Property
Tax and in negotiating with public authorities as to any Real Property Tax. If
at any time during the term of this Lease the taxation or assessment of the
Complex prevailing as of the commencement date of this Lease shall be altered so
that in lieu of or in addition to any Real Property Tax described above there
shall be levied, assessed or imposed (whether by reason of a change in the
method of taxation or assessment, creation of a new tax or charge, or any other
cause) an alternate or additional tax or charge (i) on the value, use or
occupancy of the Complex or Landlord's interest therein or (ii) on or measured
by the gross receipts, income or rentals from the Complex, on Landlords business
of leasing the Complex, or computed in any manner with respect to the operation
of the Complex, then any such tax or charge, however designated, shall be
included within the meaning of the term "Real Property Taxes" for purposes of
this Lease. If any Real Property Tax is based upon property or rents unrelated
to the Complex, then only that part of such real Property Tax that is fairly
allocable to the Complex shall be included within the meaning of the term "Real
Property Taxes". Notwithstanding the foregoing, the term "Real Property Taxes"
shall not include estate, inheritance, gift or franchise taxes of Landlord or
the federal or state net income tax imposed on Landlord's income from all
sources.

  B. Taxes of Tenant's Property.

  (a) Tenant shall be liable for and shall pay ten days before delinquency,
taxes levied against any personal property or trade fixtures placed by Tenant in
or about the Premises If any such taxes on Tenant's personal property or trade
fixtures are levied against Landlord or Landlord's property or if the assessed
value of the Premises is increased by the inclusion therein of a value placed
upon such personal property or trade fixtures of Tenant and if Landlord. after
written notice to Tenant. pays the taxes based on such increased assessment,
which Landlord shall have the right to do regardless of the validity thereof,
but only under proper protest if requested by Tenant. Tenant shall upon demand,
as the case may be, repay to Landlord the taxes so levied against Landlord. or
the proportion of such taxes resulting from such increase in the assessment;
provided that in any such event Tenant shall have the right, in the name of
Landlord and with Landlord's full cooperation, to bring suit in any court of
competent jurisdiction to recover the amount of any such taxes so paid under
protest, and any amount so recovered shall belong to Tenant.

  (b) if the Tenant improvements in the Premises, whether installed, and/or paid
for by Landlord or Tenant and whether or not affixed to the real property so as
to become a part thereof, are assessed for real property tax purposes at a
valuation higher than the valuation at which standard office improvements in
other space in the Complex are assessed, then the real property taxes and
assessments levied against Landlord or the Complex by reason of such excess
assessed valuation shall be deemed to be taxes levied against personal property
of Tenant and shall be governed by the provisions of 1213a, above. If the
records of the County Assessor are available and sufficiently detailed to serve
as a basis for determining whether said Tenant improvements are assessed at a
higher valuation than standard office improvements in other space in the
Complex, such records shall be binding on both the Landlord and the Tenant. If
the records of the County Assessor are not available or sufficiently detailed to
serve as a basis for making said determination the actual cost of construction
shall be used.

13. LIABILITY INSURANCE  Tenant at Tenant's expense, agrees to keep in force
during the term of this Lease a policy of commercial general insurance with
combined single limit coverage of not less than Two Million Dollars (2,000,000)
for injuries to or death of persons occurring in, on or about the Premises or
the Complex, and property damage. The policy or policies affecting such
insurance, certificates of insurance of which shall be furnished to Landlord,
shall name Landlord as additional insureds, and shall insure any liability of
Landlord, contingent or otherwise, as respects acts or omissions of Tenant, its
agents, employees or invitees or otherwise by any conduct or transactions of any
of said persons in or about or concerning the Premises, including any failure of
Tenant to observe or perform any of its obligations hereunder; shall be issued
by an insurance company admitted to transact business in the State of
California; and shall provide that the insurance effected thereby shall not be
canceled, except upon thirty (30) days' prior written notice to Landlord. If,
during the term of this Lease, in the considered opinion of Landlord's Lender,
insurance advisor, or counsel, the amount of insurance described in this
paragraph 13 is not adequate, Tenant agrees to increase said coverage to such
reasonable amount as Landlord's Lender, insurance advisor, or counsel shall deem
adequate.

14. TENANT'S PERSONAL PROPERTY INSURANCE AND WORKMAN'S COMPENSATION INSURANCE
Tenant shall maintain a policy or policies of fire and property damage insurance
in "all risk" form with a sprinkler leakage endorsement insuring the personal
property, inventory, trade fixtures, and leasehold improvements within the
leased Premises for the full replacement value thereof. The proceeds from any of
such policies shall be used for the repair or replacement of such items so
insured.

  Tenant shall also maintain a policy or policies of workman's compensation
insurance and any other employee benefit insurance sufficient to comply with all
laws.

15. PROPERTY INSURANCE  Landlord shall purchase and keep in force and as
Additional Rent and in accordance with Paragraph 4D of this Lease, Tenant shall
pay to Landlord (or Landlord's agent if so directed by Landlord) Tenant's
proportionate share (calculated on a square footage or other equitable basis as
calculated by Landlord) of the deductibles on insurance claims and the cost of
policy or policies of insurance covering loss or damage to the Premises and
Complex in the amount of the full replacement value thereof, providing
protection against those perils included within the classification of "all
risks" insurance and flood and/or earthquake insurance, if available, plus a
policy of rental income insurance in the amount of one hundred ( 100% ) percent
of twelve (12) months Basic Rent. plus sums paid as Additional Rent. If such
insurance cost is increased due to Tenant's use of the Premises or the Complex.
Tenant agrees to pay to Landlord the full cost of such increase. Tenant shall
have no interest in nor any right to the proceeds of any insurance procured by
Landlord for the Complex. Landlord and Tenant do each hereby respectively
release the other, to the extent of insurance coverage of the releasing party,
from any liability for loss or damage caused by fire or any of the extended
coverage casualties included in the releasing party's insurance policies,
irrespective of the cause of such fire or casualty; provided, however, that if
the insurance policy of either releasing party prohibits such waiver, then this
waiver shall not take effect until consent to such waiver is obtained. If such
waiver is so prohibited, the insured party affected shall promptly notify the
other party thereof.

                                  Page 4 of 8

 
16. INDEMNIFICATION  Landlord shall not be liable to Tenant and Tenant hereby
waives all claims against Landlord for any injury to or death of any person or
damage to or destruction of property in or about the Premises or the Complex by
or from any cause whatsoever, including, without limitation, gas, fire, oil,
electricity or leakage of any character from the roof, walls, basement or other
portion of the Premises or the Complex but excluding, however, the willful
misconduct or negligence of Landlord, its agents, servants, employees, invitees,
or contractors of which negligence Landlord has knowledge and reasonable time to
correct. Except as to injury to persons or damage to property to the extent
arising from the willful misconduct or the negligence of Landlord, its agents,
servants, employees, invitees, or contractors, Tenant shall hold Landlord
harmless from and defend Landlord against any and all expenses, including
reasonable attorneys' fees, in connection therewith, arising out of any injury
to or death of any person or damage to or destruction of property occurring in,
on or about the Premises, or any part thereof, from any cause whatsoever.

17. COMPLIANCE  Tenant, at its sole cost and expense, shall promptly comply with
all laws, statutes, ordinances and governmental rules; regulations or
requirements now or hereafter in effect; with the requirements of any board of
fire underwriters or other similar body now or hereafter constituted: and with
any direction or occupancy certificate issued pursuant to law by any public
officer; provided, however, that no such failure shall be deemed a breach of the
provisions if Tenant, immediately upon notification, commences to remedy or
rectify said failure. The judgment of any court of competent jurisdiction or the
admission of Tenant in any action against Tenant, whether Landlord be a party
thereto or not, that Tenant has violated any such law, statute, ordinance or
governmental rule, regulation, requirement, direction or provision. shall be
conclusive of that fact as between Landlord and Tenant. This paragraph shall not
be interpreted as requiring Tenant to make structural changes or improvements,
except to the extent such changes or improvements are required as a result of
Tenant's use of the Premises. Tenant shall, at its sole cost and expense, comply
with any and all requirements pertaining to said Premises. of any insurance
organization or company, necessary or the maintenance of reasonable fire and
public liability insurance coveting the Premises.              SEE PARAGRAPH 54.

18. LIENS  Tenant shall keep the Premises and the Complex free from any liens
arising out of any work performed, materials furnished or obligation incurred by
Tenant. In the event that Tenant shall not, within ten (10) days following the
imposition of such lien, cause the same to be released of record, Landlord shall
have, in addition to all other remedies provided herein and by law, the right,
but no obligation, to cause the same to be released by such means as it shall
deem proper, including payment of the claim giving rise to such lien. All sums
paid by Landlord for such purpose, and all expenses incurred by it in connection
therewith, shall be payable to Landlord by Tenant on demand with interest at the
prime rate of interest as quoted by the Bank of America.

19. ASSIGNMENT AND SUBLETTING  Tenant shall not assign, transfer, or hypothecate
the leasehold estate under this Lease, or any interest therein, and shall hot
sublet the Premises, or any part thereof, or any right or privilege appurtenant
thereto, or suffer any other person or entity to occupy or use the Premises, or
any portion thereof, without, in each case, the prior written consent of
Landlord which consent will not be unreasonably withheld. As a condition for
granting this consent to any assignment, transfer, or subletting, Landlord may
require that Tenant agrees to pay to Landlord, as additional rent, fifty percent
(50%) of all rents or additional consideration provided, however, that for
sharing such excess rent, Tenant shall first be entitled to recover from such
excess rent the amount of any reasonable leasing commissions paid by Tenant to
third parties not affiliated with Tenant received by Tenant from its assignees,
transferees, or subtenants in excess of the rent payable by Tenant to Landlord
hereunder. Tenant shall, by thirty (30) ------- days written notice, advise
Landlord of its intent to assign or transfer Tenant's interest in the Lease or
sublet the Premises or any portion thereof for any portion of the term hereof.
Within thirty (30) days after receipt of said written notice, Landlord may, in
its sole discretion, elect to terminate this Lease as to the portion of the
Premises described in Tenant's notice on the date specified in Tenant's notice
by giving written notice of such election to terminate. If no such notice to
terminate is given to Tenant within said thirty (30) day period, Tenant may
proceed to locate an acceptable sublessee, assignee, or other transferee for
presentment to Landlord for Landlord's approval, all in accordance with the
terms, covenants, and conditions of this paragraph 19. If Tenant intends to
sublet the entire Premises and Landlord elects to terminate this Lease, this
Lease shall be terminated on the date specified in Tenant's notice. If, however,
this Lease shall terminate pursuant to the foregoing with respect to less than
all the Premises, the rent, as defined and reserved hereinabove shall be
adjusted on a pro rata basis to the number of square feet retained by Tenant,
and this Lease as so amended shall continue in full force and effect. In the
event Tenant is allowed to assign, transfer or sublet the whole or any part of
the Premises. with the prior written consent of Landlord, no assignee,
transferee or subtenant shall assign or transfer this Lease, either in whole or
in part, or sublet the whole or any part of the Premises, without also having
obtained the prior written consent of Landlord which consent shall not be
unreasonably withheld. A consent of Landlord to one assignment, transfer,
hypothecation, subletting, occupation or use by any other person shall not
release Tenant from any of Tenant's obligations hereunder or be deemed to be a
consent to any subsequent similar or dissimilar assignment, transfer,
hypothecation, subletting, occupation or use by any other person. Any such
assignment, transfer, hypothecation, subletting, occupation or use without such
consent shall be void and shall constitute a breach of this Lease by Tenant and
shall, at the option of Landlord exercised by written notice to Tenant.
terminate this Lease. The Leasehold estate under this Lease shall not, nor shall
any interest therein, be assignable for any purpose by operation of law without
the written consent of Landlord which consent shall not be unreasonably
withheld. As a condition to its consent, Landlord may require Tenant to pay all
expenses in connection with the assignment, and Landlord may require Tenant's
assignee or transferee (or other assignees or transferees) to assume in writing
all of the obligations under this Lease and for Tenant to remain liable to
Landlord under the Lease.                                      SEE PARAGRAPH 56.

20. SUBORDINATION AND MORTGAGES In the event Landlord's title or leasehold
interest is now or hereafter encumbered by a deed of trust, upon the interest of
Landlord in the land and buildings in which the demised Premises are located, to
secure a loan from a lender (hereinafter referred to as "Lender") to Landlord,
Tenant shall, at the request of Landlord or Lender, execute in writing an
agreement subordinating its rights under this Lease to the lien of such deed of
trust, or, if so requested, agreeing that the lien of Lender's deed of trust
shall be or remain subject and subordinate to the rights of Tenant under this
Lease. Notwithstanding any such subordination, Tenant's possession under this
Lease shall not be disturbed if Tenant is not in default and so long as Tenant
shall pay all rent and observe and perform all of the provisions set forth in
this Lease.

21. ENTRY BY LANDLORD   Landlord reserves, and shall at all reasonable times
after at least 24 hours notice (except in emergencies) have, the right to enter
the Premises to inspect them; to perform any services to be provided by Landlord
hereunder; to submit the Premises to prospective purchasers, mortgagers or
tenants; to post notices of nonresponsibility; and to alter, improve or repair
the Premises and any portion of the Complex, all without abatement of rent; and
may erect scaffolding and other necessary structures in or through the Premises
where reasonably required by the character of the work to be performed;
provided, however that the business of Tenant shall be interfered with to the
least extent that is reasonably practical. For each of the foregoing purposes
any entry to the Premises obtained by Landlord by any of said means, or
otherwise, shall not under any circumstances be construed or deemed to be a
forcible or unlawful entry into or a detainer of the Premises or an eviction,
actual or constructive, of Tenant from the Premises or any portion thereof.
Landlord shall also have the right at any time to change the arrangement or
location of entrances or passageways, doors and doorways, and corridors,
elevators, stairs, toilets or other public parts of the Complex and to change
the name, number or designation by which the Complex is commonly known, and none
of the foregoing shall be deemed an actual or constructive eviction of Tenant,
or shall entitle Tenant to any reduction of rent hereunder.

22. BANKRUPTCY AND DEFAULT  The commencement of bankruptcy action or liquidation
action or reorganization action or insolvency action or an assignment of or by
Tenant for the benefit of creditors, or any similar action undertaken by Tenant,
or the insolvency of Tenant, shall, at Landlord's option, constitute a breach of
this Lease by Tenant. If the trustee or receiver appointed to serve during a
bankruptcy, liquidation, reorganization, insolvency or similar action elects to
reject Tenant's unexpired Lease, the trustee or receiver shall notify Landlord
in writing of its election within thirty (30) days after an order for relief in
a liquidation action or within thirty (30) days after the commencement of any
action.

  Within thirty (30) days after court approval of the assumption of this Lease,
the trustee or receiver shall cure (or provide adequate assurance to the
reasonable satisfaction of Landlord that the trustee or receiver shall cure) any
and all previous defaults under the unexpired Lease and shall compensate
Landlord for all actual pecuniary loss and shall provide adequate assurance of
future performance under said Lease to the reasonable satisfaction of Landlord.
Adequate assurance of future performance, us used herein, includes, but shall
not be limited to: (i) assurance of source and payment of rent, and other
consideration due under this Lease; (ii) assurance that the assumption or
assignment of this Lease will not breach substantially any provision, such as
radius, location, use, or exclusivity provision, in any agreement relating to
the above described Premises.

  Nothing contained in this section shall affect the existing right of Landlord
to refuse to accept an assignment upon commencement of or in connection with a
bankruptcy, liquidation, reorganization or insolvency action or an assignment of
Tenant for the benefit of creditors or other similar act. Nothing contained in
this Lease shall be construed as giving or granting or creating an equity in the
demised Premises to Tenant. In no event shall the leasehold estate under this
Lease, or any interest therein, be assigned by voluntary or involuntary
bankruptcy proceeding without the prior written consent of Landlord. In no event
shall this Lease or any rights or privileges hereunder be an asset of Tenant
under any bankruptcy, insolvency or reorganization proceedings.

  The failure to perform or honor any covenant, condition or representation made
under this Lease shall constitute a default hereunder by Tenant upon expiration
of the appropriate grace period hereinafter provided. Tenant shall have a period
of five (5) days from the date of written notice from Landlord within which to
cure any default in the payment of rental or adjustment thereto. Tenant shall
have a period of thirty (30) days from the date of written notice from Landlord
within which to cure any other default under this Lease; provided, however, that
if the nature of Tenant's failure is such that more than thirty (30) days is
reasonably required to cure the same, Tenant shall not be in default so long as
Tenant commences performance within such thirty (30) day period and thereafter
prosecutes the same to completion. Upon an uncured default of this Lease by
Tenant, Landlord shall have the following rights and remedies in addition to any
other rights or remedies available to Landlord at law or in equity:

  (a). The rights and remedies provided for by California Civil Code Section
1951.2, including but not limited to recovery of the worth at the time of award
of the amount by which the unpaid rent for the balance of the term after the
time of award exceeds the amount of rental loss for the same period that Tenant
proves could be reasonably avoided, as computed pursuant to subsection (b) of
said Section 1952.2. Any proof by Tenant under subparagraphs (2) and (3) of
Section 1951.2 of the California Civil Code of the amount of rental loss that
could be reasonably avoided shall be made in the following manner: Landlord and
Tenant shall each select a licensed real estate broker in the business of rented
property of the same type and use as the Premises and in the same geographic
vicinity. Such two real estate brokers shall select a third licensed real 
estate

                                  Page 5 of 8

 
broker, and the three licensed real estate brokers so selected shall determine
the amount of the rental loss that could be reasonably avoided from the balance
of the term of this Lease after the time of award. The decision of the majority
of said licensed real estate brokers shall be final and binding upon the panics
hereto.

  (b). The rights and remedies provided by California Civil Code Section which
allows Landlord to continue the Lease in effect and to enforce all of its rights
and remedies under this Lease, including the right to recover rent as it becomes
due, for so long as Landlord does not terminate Tenant's right to possession;
acts of maintenance or preservation, efforts to relet the Premises, or the
appointment of a receiver upon Landlord's initiative to protect its interest
under this Lease shall not constitute a termination of Tenant's right to
possession.

  (c). The right to terminate this Lease by giving notice to Tenant in
accordance with applicable law.

  (d). To the extent permitted by law the right and power to enter the Premises
and remove therefrom all persons and property, to store such property in a
public warehouse or elsewhere at the cost of and for the account of Tenant, and
to sell such property and apply such proceeds therefrom pursuant to applicable
California law. Landlord may from time to time sublet the Premises or any part
thereof for such term or terms (which may extend beyond the term of this Lease)
and at such rent and such other terms as Landlord in its sole discretion may
deem advisable, with the right to make alterations and repairs to the Premises.
Upon each subletting. (i) Tenant shall be immediately liable to pay Landlord, in
addition to indebtedness other than rent due hereunder, the cost of such
subletting, including, but not limited to, reasonable attorneys' fees, and any
real estate commissions actually paid. and the cost of such alterations and
repairs incurred by Landlord and the amount, if any, by which the rent hereunder
for the period of such subletting (to the extent such period does not exceed the
term hereof exceeds the amount to be paid as rent for the Premises for such
period or (it) at the option of Landlord, rents received from such subletting
shall be applied first to payment of indebtedness other than rent due hereunder
from Tenant to Landlord; second, to the payment of any costs of such subletting
and of such alterations and repairs; third to payment of rent due and unpaid
hereunder; and the residue, if any, shall be held by Landlord and applied in
payment of future rent as the same becomes due hereunder. If Tenant has been
credited with any rent to be received by such subletting under option (i) and
such rent shall not be promptly paid to Landlord by the subtenant(s), or if such
rentals received from such subletting under option (it) during any month be less
than that to be paid during that month by Tenant hereunder. Tenant shall pay any
such deficiency to Landlord. Such deficiency shall be calculated and paid
monthly. For all purposes set forth in this subparagraph. No taking possession
of the 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. Notwithstanding any such subletting without termination, Landlord may at
any time hereafter elect to terminate this Lease for such previous breach.

  (e). The right to have a receiver appointed for Tenant upon application by
Landlord, to take possession of the Premises and to apply any rental collected
from the Premises and to exercise all other rights and remedies granted to
Landlord pursuant to subparagraph d. above.

23. ABANDONMENT  Tenant shall not vacate or abandon the Premises at any time
during the term of this Lease (except that Tenant may vacate so long as it pays
rent, provides an on-site security guard during normal business hours from
Monday through Friday, and otherwise performs its obligations hereunder) and if
Tenant shall abandon, vacate or surrender said Premises or be dispossessed by
the process of law, or otherwise, any personal Property belonging to Tenant and
left on the premises shall be deemed to be abandoned, at the option of Landlord,
except such property as may be mortgaged to Landlord.

24. DESTRUCTION  In the event the Premises are destroyed in whole or in part
from any cause, except for routine maintenance and repairs and incidental damage
and destruction caused from vandalism and accidents for which Tenant is
responsible for under Paragraph 10, Landlord may, at its option:

 (a) Rebuild or restore the Premises to their condition prior to the damage or
destruction, or

  (b) Terminate this Lease. (providing that the Premises is damaged to the
extent of 33 1/3% of the replacement cost)

  If Landlord does not give Tenant notice in writing within thirty (30) days
from the destruction of the Premises of its election to either rebuild and
restore them, or to terminate this Lease, Landlord shall be deemed to have
elected to rebuild or restore them, in which event Landlord agrees, at its
expense, promptly to rebuild or restore the Premises to their condition prior to
the damage or destruction. Tenant shall be entitled to a reduction in rent while
such repair is being made in the proportion that the area of the Premises
rendered untenantable by such damage bears to the total area of the Premises. If
Landlord initially estimates that the rebuilding or restoration will exceed 180
days or if Landlord does not complete the rebuilding or restoration within one
hundred eighty (180) days following the date of destruction (such period of time
to be extended for delays caused by the fault or neglect of Tenant or because of
Acts of God, acts of public agencies, labor disputes, strikes, fires, freight
embargoes, rainy or stormy weather inability to obtain materials, supplies or
fuels, acts of contractors or subcontractors, or delay of the contractors or
subcontractors due to such causes or other contingencies beyond the control of
Landlord), then Tenant shall have the right to terminate this Lease by giving
fifteen (15) days prior written notice to Landlord. Notwithstanding anything
herein to the contrary, Landlord's obligation to rebuild or restore shall be
limited to the building and interior improvements constructed by Landlord as
they existed as of the commencement date of the Lease and shall not include
restoration of Tenant's trade fixtures, equipment, merchandise, or any
improvements, alterations or additions made by Tenant to the Premises, which
Tenant shall forthwith replace or fully repair at Tenant's sole cost and expense
provided this Lease is not cancelled according to the provisions above.

  Unless this Lease is terminated pursuant to the foregoing provisions this
Lease shall remain in full force and effect. Tenant hereby expressly waives the
provisions of Section 1932. Subdivision 2, in Section 1933, Subdivision 4 of the
California Civil Code.

  In the event that the building in which the Premises are situated is damaged
or destroyed to the extent of not less that 33 1/3 % of the replacement cost
thereof. Landlord may elect to terminate this Lease, whether the Premises be
injured or not.

25 EMINENT DOMAIN  If all or any part of the Premises shall be taken by any
public or quasi-public authority under the power of eminent domain or conveyance
in lieu thereof, this Lease shall terminate as to any portion of the Premises so
taken or conveyed on the date when title vests in the condemnor, and Landlord
shall be entitled to any and all payment, income, rent, award, or any interest
therein whatsoever which may be paid or made in connection with such taking or
conveyance, and Tenant shall have no claim against Landlord or otherwise for the
value of any unexpired term of this Lease.  Notwithstanding the foregoing
paragraph, any compensation specifically awarded Tenant for loss of business,
Tenant's personal property, moving cost or loss of goodwill, shall be and remain
the property of Tenant.

  If (i) any action or proceeding is commenced for such taking of the Premises
or any part thereof, or if Landlord is advised in writing by any entity or body
having the right or power of condemnation of its intention to condemn the
premises or any portion thereof, or (ii) any of the foregoing events occur with
respect to the taking of any space in the Complex not leased hereby, or if any
such spaces so taken or conveyed in lieu of such taking and Landlord shall
decide to discontinue the use and operation of the Complex, or decide to
demolish, alter or rebuild the Complex, then, in any of such events landlord
shall have the right to terminate this Lease by giving Tenant written notice
thereof within sixty (60) days of the date of receipt of said written advice, or
commencement of said action or proceeding, or taking conveyance, which
termination shall take place as of the first to occur of the last day of the
calendar month next following the month in which such notice is given or the
date of which title to the Premises shall vest in the condemnor.

  In the event of such a partial taking or conveyance of the Premises, if the
portion of the premises taken or conveyed is so substantial that the Tenant can
no longer reasonably conduct its business.  Tenant shall have the privilege of
terminating this Lease within sixty (60) days from the date of such taking or
conveyance, upon written notice to landlord of its intention so to do, and upon
giving of such notice this lease shall terminate on the last day of the calendar
month next following the month in which  such notice is given, upon payment by
Tenant of the rent from the date of such taking or conveyance to the date of
termination.

  If a portion of the premises be taken by condemnation or conveyance in lieu
thereof and neither Landlord nor Tenant shall terminate this Lease as provided
herein, this Lease shall continue in full force and effect as to the part of the
Premises not so taken or conveyed, and the rent herein shall be apportioned as
of the date of such taking or conveyance so that thereafter the rent to be paid
by Tenant shall be in the ratio that the area of the portion of the Premises not
so taken or conveyed bears to the total area of the Premises prior to such
taking.

26. SALE OR CONVEYANCE BY LANDLORD In the event of a sale or conveyance of the
Complex or any interest therein, by any owner of the reversion then constituting
Landlord, the transferor shall thereby be released from any further liability
upon any of the terms, covenants or conditions (express or implied) herein
contained in favor of Tenant, and in such event, insofar as such transfer is
concerned, Tenant agrees to look solely to the responsibility of the successor
in interest of such transferor in and to the Complex and this Lease. This Lease
shall not be affected by any such sale or conveyance, and Tenant agrees to
attorn to the successor in interest of such transferor. SEE PARAGRAPH 57.

27. ATTORNMENT TO LENDER OR THIRD PARTY In the event the interest of Landlord in
the land and buildings in which the leased Premises are located (whether such
interest of Landlord is a fee title interest or a leasehold interest ) is
encumbered by deed of trust, and such interest is acquired by the' lender or any
third party through judicial foreclosure or by exercise of a power of sale at
private trustee's foreclosure sale, Tenant hereby agrees to attorn to the
purchaser at any such foreclosure sale and to recognize such purchaser as the
Landlord under this Lease. In the event the lien of the deed of trust securing
the loan from a Lender to Landlord is prior and paramount to the Lease. this
Lease shall nonetheless continue in full force and effect for the remainder of
the unexpired term hereof, at the same rental herein reserved and upon all the
other terms, conditions and covenants herein contained.

28. HOLDING OVER Any holding over by Tenant after expiration or other
termination of the term of this Lease with the written consent of Landlord
delivered to Tenant shall not constitute a renewal or extension of the Lease or
give Tenant any rights in or to the leased Premises except as expressly provided
in this Lease. Any holding over after the expiration or other termination of the
term of this Lease, with the consent of Landlord, shall be construed to be a
tenancy from month to month on the same terms and conditions herein specified
insofar as applicable except that the monthly Basic Rent shall be increased to
an amount equal to one hundred fifty (150%) percent of the monthly Basic Rent
required during the last month of the Lease term.

                                  Page 6 of 8

 
29. CERTIFICATE OF ESTOPPEL Tenant shall at any time upon not less than ten (10)
business days' prior written notice to Landlord execute, acknowledge and deliver
to Landlord a statement in writing (i) certifying that this Lease is unmodified
and in full force and effect (or. if modified. Mating the nature of such
modification and certifying that this Lease, as so modified, is in full force
and effect) and the date to which the rent and other charges are paid in
advance, if any, and (ii) acknowledging that there are not, to Tenant's
knowledge, any uncured defaults on the part of Landlord hereunder, or specifying
such defaults, if any, are claimed. Any such statement may be conclusively
relied upon by any prospective purchaser or encumbrancer of the Premises.
Tenant's failure to deliver such statement within such time shall be conclusive
upon Tenant that this Lease is in full force and effect, without modification
except as may be represented by Landlord; that there are no uncured default, in
Landlord's performance, and that not more than one month's rent has been paid in
advance.

30. CONSTRUCTION CHANGES  It is understood that the description of the Premises
and the location of ductwork, plumbing and other facilities therein are subject
to such minor changes as Landlord or Landlord's architect determines to be
desirable in the course of construction of the Premises, and no such changes, or
any changes in plans for any other portions of the Complex shall affect this
Lease or entitle Tenant to any reduction of rent hereunder or result in any
liability of Landlord to Tenant. Landlord does not guarantee the accuracy of any
drawings supplied to Tenant and verification of the accuracy of such drawings
rests with Tenant.

31. RIGHT OF LANDLORD TO PERFORM  All terms, covenants and conditions of this
Lease to be performed or observed by Tenant shall be performed or observed by
Tenant at Tenant's sole cost and expense and without any reduction of rent. If
Tenant shall fail to pay any sum of money, or other rent. required to be paid by
it hereunder or shall fail to perform any other term or covenant hereunder on
its part to be performed, and such failure shall continue for five (5) days
after written notice thereof by Landlord, Landlord, without waiving or releasing
Tenant from any obligation of Tenant hereunder, may. but shall not be obligated
to. make any such payment or perform any such other term or covenant on Tenant's
part to be performed. All sums so paid by Landlord and all necessary costs of
such performance by Landlord together with interest thereon at the rate of the
prime rate of interest per annum as quoted by the Bank of America from the date
of such payment or performance by Landlord, shall be paid (and Tenant covenants
to make such payment) to Landlord on demand by Landlord, and Landlord shall have
(in addition to any other right or remedy of Landlord) the same rights and
remedies in the event of nonpayment by Tenant as in the case of failure by
Tenant in the payment of rent hereunder.

32. ATTORNEYS' FEES.

  (A) In the event that either Landlord or Tenant should bring suit for the
possession of the Premises, lot the recovery of any sum due under this Lease, or
because of the breach of any provision of this Lease, or for any other relief
against the other party hereunder, then all costs and expenses, including
reasonable attorneys' fees, incurred by the prevailing party therein shall be
paid by the other party, which obligation on the part of the other party shall
be deemed to have accrued on the date of the commencement of such action and
shall be enforceable whether or not the action is prosecuted to judgement.

  (B) Should Landlord be named as a defendant in any suit brought against Tenant
in connection with or arising out of Tenant's occupancy hereunder. Tenant shall
pay to Landlord its costs and expenses incurred in such suit, including a
reasonable attorney's fee.

33. WAIVER  The waiver by either party of the other party's failure to perform
or observe any term, covenant or condition herein contained to be performed or
observed by such waiving party shall not be deemed to be a waiver of such term.
covenant or condition or of any subsequent failure of the party failing to
perform or observe the same or any other such term, covenant or condition
therein contained, and no custom or practice which may develop between the
parties hereto during the term hereof shall be deemed a waiver of or in any way
affect, the right of either party to insist upon performance and observance by
the other party in strict accordance with the terms hereof.

34. NOTICES All notices, demands, requests, advices or designations which may be
or are required to be given by either party to the other hereunder shall be in
writing. All notices, demands, requests, advices or designations by Landlord to
Tenant shall be sufficiently given, made or delivered if personally served on
Tenant by leaving the same at the Premises or if sent by United States certified
or registered mail, postage prepaid, addressed to Tenant at the Premises. All
notices demands, requests, advices or designations by Tenant to Landlord shall
be sent by United States certified or registered mail, postage prepaid,
addressed to Landlord at its offices at Peery/Arrillaga, 2560 Mission College
Blvd., Suite 101 Santa Clara, CA 95054. Each notice, request, demand, advice or
designation referred to in this paragraph shall be deemed received on the date
of the personal service/or mailing thereof in the manner herein provided, as the
case may be.

35. EXAMINATION OF LEASE  Submission of this instrument for examination or
signature by Tenant does not constitute a reservation of or option for a lease,
and this instrument is not effective as a lease or otherwise until its execution
and delivery by both Landlord and Tenant.

36. DEFAULT BY LANDLORD Landlord shall not be in default unless Landlord fails
to perform obligations required of Landlord within a reasonable time, but in no
event earlier than thirty (30) days after written notice by Tenant to Landlord
and to the holder of any first mortgage or deed of trust coveting the Premises
whose name and address shall have heretofore been furnished to Tenant in
writing, specifying wherein Landlord has tailed to perform such obligations;
provided, however, that if the nature of Landlord's obligations is such that
more than thirty (30) days are required for performance, then Landlord shall not
be in default if Landlord commences performance within such thirty (30) day
period and thereafter diligently prosecutes the same to completion.

37. CORPORATE AUTHORITY If Tenant is a corporation, (or a partnership) each
individual executing this Lease on behalf of said corporation (or partnership)
represents and warrants that he is duly authorized to execute and deliver this
Lease on behalf of said corporation (or partnership) in accordance with the by-
laws of said corporation (or partnership in accordance with the partnership
agreement) and that this Lease is binding upon said corporation (or partnership)
in accordance with its terms. If Tenant is a corporation, Tenant shall, within
thirty (30) days after execution of this Lease. deliver to Landlord a certified
copy of the resolution of the Board of Directors of said corporation authorizing
or ratifying the execution of this Lease.

39. LIMITATION OF LIABILITY In consideration of the benefits accruing hereunder.
Tenant and all successors and assigns covenant and agree that. in the event of
any actual or alleged failure, breach or default hereunder by Landlord:

  (i)    the sole and exclusive remedy shall be against Landlord and Landlord's
         assets:
  (ii)   no partner of Landlord shall be sued or named as a party in any suit or
         action (except as may be necessary to secure jurisdiction of the
         partnership)
  (iii)  no service of process shall be made against any partner of Landlord
         (except as may be necessary to secure jurisdiction of the partnership)
  (iv)   no partner of Landlord shall be required to answer or otherwise plead
         to any service of process:
  (v)    no judgment will be taken against any partner of Landlord:
  (vi)   any judgment taken against any partner of Landlord may be vacated and
         set aside at any time without hearing:
  (vii)  no writ of execution will ever be levied against the assets of any
         partner of Landlord:
  (viii) these covenants and agreements are enforceable both by Landlord and
         also by any partner of Landlord.

  Tenant agrees that each of the foregoing covenants and agreements shall be
applicable to any covenant or agreement either expressly contained in this Lease
or imposed by statute or at common law.


                                  Page 7 of 8

 
40.  MISCELLANEOUS AND GENERAL PROVISIONS

  a. Tenant shall not, without the written consent of Landlord, use the name of
  the building for any purpose other than as the address of the business
  conducted by Tenant in the Premises.

  b. This Lease shall in all respects be governed by and construed in accordance
  with the laws of the State of California. If any provision of this Lease shall
  be invalid, unenforceable or ineffective for any reason whatsoever, all other
  provisions hereof shall be and remain in full force and effect.

  c. The term "Premises" includes the space leased hereby and any improvements
  now or hereafter installed therein or attached thereto. The term "Landlord" or
  any pronoun used in place thereof includes the plural as well as the singular
  and the successors and assigns of Landlord. The term "Tenant or any pronoun
  used in place thereof includes the plural as well as the singular and
  individuals, firms, associations, partnerships and corporations, and their and
  each of their respective heir, executors, administrators, successors and
  permitted assigns, according to the context hereof, and the provisions of this
  Lease shall inure to the benefit of and bind such heirs, executors,
  administration, successors and permitted assigns.

     The term "person" includes the plural as well as the singular and
  individuals, firms, associations, partnerships and corporations. Words used in
  any gender include other genders. If there be more than one Tenant the
  obligations of Tenant hereunder are joint and several. The paragraph headings
  of this Lease are for convenience of reference only and shall have no effect
  upon the construction or interpretation of any provision hereof.

  d. Time is of the essence of this Lease and of each and all of its provisions.

  e. At the expiration or earlier termination of this Lease, Tenant shall
  execute, acknowledge and deliver to Landlord, within ten (10) days after
  written demand from Landlord to Tenant. any quitclaim deed or other document
  required by any reputable title company, licensed to operate in the State of
  California, to remove the cloud or encumbrance created by this Lease from the
  real properly of which Tenant's Premises are a part.

  f. This instrument along with any exhibits and attachments hereto constitutes
  the entire agreement between Landlord and Tenant relative to the Premises and
  this agreement and the exhibits and attachments may be altered, amended or
  revoked only by an instrument in writing signed by both Landlord and Tenant.
  Landlord and Tenant agree hereby that all prior or contemporaneous oral
  agreements between and among themselves and their agents or representatives
  relative to the leasing of the Premises are merged in or revoked by this
  agreement.

  g. Neither Landlord nor Tenant shall record this Lease or a short form
  memorandum hereof without the consent of the other.

  h. Tenant further agrees to execute any amendments required by a lender to
  enable Landlord to obtain financing, so long as Tenant's rights hereunder are
  not substantially affected.

  i. Paragraphs 43 through 58 are added hereto and are included as a part of
  this lease.

  j. Clauses, plats and riders, if any, signed by Landlord and Tenant and
  endorsed on or affixed to this Lease are a part hereof.

  k. Tenant covenants and agrees that no diminution or shutting off of light,
  air or view by any structure which may be hereafter erected (whether or not by
  Landlord) shall in any way affect his Lease entitle Tenant to any reduction of
  rent hereunder or result in any liability of Landlord to Tenant.


41. BROKERS Tenant warrants that it had dealings with only the following real
estate brokers or agents in connection with the negotiation of this Lease: none
                                                                           ----
and that it knows of no other real estate broker or agent who is entitled to a
commission in connection with this Lease.

42. SIGNS  No sign, placard, picture, advertisement, name or notice shall be
inscribed, displayed or printed or affixed on or to any part of the outside of
the Premises or any exterior windows of the Premises without the written consent
of Landlord first had and obtained and Landlord shall have the right to remove
any such sign, placard, picture, advertisement, name or notice without notice to
and at the expense of Tenant. If Tenant is allowed to print or affix or in any
way place a sign in, on, or about the Premises, upon expiration or other sooner
termination of this Lease, Tenant at Tenant's sole cost and expense shall both
remove such sign and repair all damage in such a manner as to restore all
aspects of the appearance of the Premises to the condition prior to the
placement of said sign.

    All approved signs or lettering on outside doors shall be printed, painted,
    affixed or inscribed at the expense of Tenant by a person approved of by
    Landlord. Tenant shall not place anything or allow anything to be placed
    near the glass of any window, door partition or wall which may appear
    unsightly from outside the Premises.

    Subject to approval by the City of Santa Clara, Landlord shall install, at
    Landlord's cost and expense, a monument on the berm, in a location to be
    selected by Landlord, and Tenant may use up to 76% of said monument for its
    sign. In the event Tenant leases 100% of said building, Tenant may use 100%
    of said monument for its sign. Tenant shall pay for all costs and expenses
    related to the installation of its sign and the eventual removal thereof.

IN WITNESS WHEREOF. Landlord and Tenant have executed and delivered this Lease
as of the day and year last written below.


LANDLORD:                                  TENANT:

ARRILLAGA FAMILY TRUST                     LATITUDE COMMUNICATIONS,
                                           a California corporation


By /s/ John Arrillaga                      By /s/ Emil Wang
   -------------------------------------     -------------------------- 
    John Arrillaga, Trustee

Dated: 8/24/95                             Title  PRESIDENT & CEO
      ----------------------------------         ----------------------

RICHARD T. PEERY SEPARATE PROPERTY TRUST

                                           Type or Print Name EMIL WANG
                                                              ---------

BY /s/ Richard T. Peery                    Dated:  8/24/95
  --------------------------------------          ----------------------
    Richard T. Peery, Trustee 

Dated: 8/30/95
      ----------------------------------

 
Paragraphs 43 through 58 to Lease Agreement Dated July 31, 1995, By and Between
the Arrillaga Family Trust and the Richard T. Peery Separate Property Trust, as
Landlord, and LATITUDE COMMUNICATIONS, a California corporation, as Tenant for
39,157+ Square Feet of Space Located at 2121 Tasman Drive, Santa Clara,
California.

43.  BASIC RENT: In accordance with Paragraph 4A herein, the total aggregate sum
     ---------
of TWO MILLION TWO HUNDRED THIRTY ONE THOUSAND NINE HUNDRED FORTY NINE AND
NO/100 DOLLARS ($2,231,949.00), shall be payable as follows:


     On January 1, 1996, the sum of THIRTY THREE THOUSAND TWO HUNDRED EIGHTY
THREE AND 45/100 DOLLARS ($33,283.45) shall be due, and a like sum due on the
first day of each month thereafter, through and including December 1, 1996.

     On January 1, 1997, the sum of THIRTY FIVE THOUSAND TWO HUNDRED FORTY ONE
AND 30/100 DOLLARS ($35,241.30) shall be due, and a like sum due on the first
day of each month thereafter, through and including December 1, 1997.

     On January 1, 1998, the sum of THIRTY SEVEN THOUSAND ONE HUNDRED NINETY
NINE AND 15/100 DOLLARS ($37,199.15) shall be due, and a like sum due on the
first day of each month thereafter, through and including December 1, 1998.

     On January 1, 1999, the sum of THIRTY NINE THOUSAND ONE HUNDRED FIFTY SEVEN
AND NO/100 DOLLARS ($39,157.00) shall be due, and a like sum due on the first
day of each month thereafter, through and including December 1, 1999.

     On January 1, 2000, the sum of FORTY ONE THOUSAND ONE HUNDRED FOURTEEN AND
85/100 DOLLARS ($41,114.85) shall be due, and a like sum due on the first day of
each month thereafter, through and including December 1, 2000; or until the
entire aggregate sum of TWO MILLION TWO HUNDRED THIRTY ONE THOUSAND NINE HUNDRED
FORTY NINE AND NO/100 DOLLARS ($2,231,949.00) has been paid.

44.  EARLY ENTRY: Subject to the provisions of Paragraph 47, ("Tenant Interior
     -----------
Improvements") Tenant and its agents and contractors shall be permitted to enter
the Premises prior to the Commencement Date for the purpose of installing at
Tenant's sole cost and expense, Tenant's trade fixtures and equipment, telephone
equipment, security systems and cabling for computers. Such entry shall be
subject to all of the terms and conditions of this Lease, except that Tenant
shall not be required to pay any Rent on account thereof. Any entry or
installation work by Tenant and its agents in the Premises pursuant to this
Paragraph 44 shall (i) be undertaken at Tenant's sole risk, (ii) not interfere
                                                 ---------
with or delay Landlord's work in the Premises (if any), and (iii) not be deemed
occupancy or possession of the Premises for purposes of the Lease. Tenant shall
indemnify, defend, and hold Landlord harmless From any and all loss, damage,
liability, expense (including reasonable attorney's fees), claim or demand of
whatsoever character, direct or consequential, including, but without limiting
thereby the generality of the foregoing, injury to or death of persons and
damage to or loss of property arising out of the exercise by Tenant of any early
entry right granted hereunder. In the event Tenant's work in said Premises
delays the completion of the interior improvements to be provided by Landlord,
if any, or in the event Tenant has not completed construction of it's interior
improvements by the scheduled Commencement Date, it is agreed between the
parties that this Lease will commence on the scheduled Commencement Date of
January 1, 1996 regardless of the construction status of said interior
improvements completed or to be completed by Tenant or Landlord. Landlord and
Tenant acknowledge that the date on which Tenant's obligation to pay Rent under
the Lease would otherwise commence may be delayed because of a delay in
completion of construction of the Tenant Improvements due to (i) any act by
Tenant which interferes with or delays construction of the Tenant Improvements,
including Tenant's entry to install trade fixtures pursuant to Paragraph 44
hereof, (ii) any changes, modifications and/or additions in the Tenant
Improvements requested by Tenant and approved by Landlord, or (iii) special
materials or equipment ordered or specified by Tenant that cannot be obtained by
Landlord at normal cost within a reasonable period of time because of limited
availability. It is the intent of the parties hereto that the commencement of
Tenant's obligation to pay Rent under the Lease not be delayed by any of such
causes or by any other act of Tenant (except as expressly provided herein) and,
in the event it is so delayed, Tenant's obligation to pay Rent under the Lease
shall commence as of the date it would otherwise have commenced absent delay
caused by Tenant.



                                    Page 9

 
45.  EARLY OCCUPANCY: Notwithstanding anything to the contrary in this Lease, in
     ---------------
the event the Premises leased hereunder become available for Tenant's use and
occupancy prior to the scheduled Commencement Date hereof, Tenant shall have the
right to occupy the Premises as of the date Landlord so completes said Premises
for Tenant's use and occupancy. This Lease shall commence and Tenant shall pay
to Landlord, effective as of the data Premises are delivered to Tenant, all
Additional Rent expenses which are Tenant's responsibility hereunder (however,
Tenant shall not be responsible for paying Basic Rent during the early occupancy
period), and Tenant shall be obligated to perform, and be bound by, each and
every term, covenant, and condition of this Lease. In the event Tenant occupies
the Premises prior to January 1, 1996, the Term of this Lease will be extended
to include the early occupancy period (i.e. If Tenant occupies said space on
December 1, 1995, the Lease Term will be extended for one month from a five year
Term to a five year one month Term).

46.  "AS-IS" BASIS: Subject only to Paragraphs 47, 54 and 55, and to Landlord
      ------------
making the improvements shown on Exhibit B to be attached hereto, it is hereby
                                 ---------
agreed that the Premises leased hereunder is leased strictly on an "as-is" basis
and in its present condition, and in the configuration as shown on Exhibit B to
                                                                   ---------
be attached hereto, and by reference made a part hereof. Except as noted herein,
it is specifically agreed between the parties that after Landlord makes the
interior improvements as shown on Exhibit B, Landlord shall not be required to
                                  ---------
make, nor be responsible for any cost, in connection with any repair,
restoration, and/or improvement to the Premises in order for this Lease to
commence, or thereafter, throughout the Term of this Lease. Landlord makes no
warranty or representation of any kind or nature whatsoever as to the condition
or repair of the Premises, nor as to the use or occupancy which may be made
thereof.

47.  TENANT INTERIOR IMPROVEMENTS: Landlord shall, at its sole cost and expense,
     ----------------------------
construct certain interior improvements (the "Tenant Improvements") in the
Premises, as shown on Exhibit B to be attached to the Lease and Landlord agrees
                      ---------
to deliver the Premises leased hereunder to Tenant, at Landlord's expense, in
the configuration shown in Red on Exhibit B to be attached hereto.
                                  ---------
Notwithstanding anything to the contrary above, it is specifically understood
and agreed that Landlord shall be required to furnish only a standard air
conditioning/heating system, normal electrical outlets, standard fire sprinkler
systems, standard bathroom, standard lobby, 2'x 4' suspended acoustical tile
drop ceiling throughout the entire space leased, carpeting and/or vinyl-coated
floor tile, and standard office partitions and doors, as shown on Exhibit B to
                                                                  ---------
be attached hereto; provided however, that any special HVAC and/or plumbing
and/or electrical requirements over and above that normally supplied by Landlord
shall be 100 percent the responsibility of and be paid for 100 percent by
Tenant.

Notwithstanding anything to the contrary, it is agreed that in the event Tenant
makes changes, additions, or modifications to the plans and specifications to be
constructed by Landlord as set forth herein, or improvements are installed for
Tenant in excess of those to be provided Tenant by Landlord as set forth on
Exhibit B, any increased cost(s) resulting from said changes, additions, and/or
- ---------
modifications and/or improvements in excess of those to be provided Tenant shall
be contracted for with Landlord and paid for one hundred percent (100%) by
Tenant.

The interior shall be constructed in accordance with Exhibit B of the Lease, it
                                                     ---------
being agreed, however, that if the interior improvements relating thereto do not
conform exactly to the plans and specifications as set forth in the Lease, and
the general appearance, structural integrity, and Tenant's uses and occupancy of
the Premises and interior improvements relating thereto are not materially or
unreasonably affected by such deviation, it is agreed that the commencement date
of the Lease, and Tenant's obligation to pay rental, shall not be affected, and
Tenant hereby agrees, in such event, to accept the Premises and interior
improvements as constructed by Landlord.

Tenant shall have forty five (45) days after the Commencement Date to provide
Landlord with a "punch list" pertaining to Landlord's work With respect to
Tenants interior improvements. As soon as reasonably possible thereafter,
Landlord, or one of Landlord's representatives (if so approved by Landlord), and
Tenant shall conduct a joint walk-through of the Premises (if Landlord so
requires), and inspect such Tenant Improvements, using their best efforts to
agree on the incomplete or defective construction related to the Tenant
Improvements Landlord. After such inspection has been completed, Landlord shall
prepare, and both parties shall sign, a list of all "punch list" items which the
parties reasonably agree are to be corrected



                                   Page 10 

 
by Landlord (but which shall exclude any damage or defects caused by Tenant, its
employees, agents or parties Tenant has contracted with to work on the
Premises). Landlord shall have thirty (30) days thereafter (or longer if
necessary, provided Landlord is diligently pursuing the completion of the same)
to complete, at Landlord's expense, the repairs on the "punch list" without the
Commencement Date of the Lease and Tenant's obligation to pay Rental thereunder
being affected. This Paragraph shall be of no force and effect if Tenant shall
fail to give any such notice to Landlord within thirty (30) days after the
Commencement Date of this Lease.

48.  OPTION TO EXTEND LEASE FOR FIVE (5) YEARS: Provided Tenant is not in
     -----------------------------------------
default (pursuant to Paragraph 22 of the Lease, i.e., Tenant has received notice
                                                ----
and any applicable cure period has expired without cure) of any of the terms,
covenants, and conditions of this Lease Agreement, Landlord hereby grants to
Tenant an Option to Extend this Lease Agreement for an additional five (5) year
period (the "Extended Term") upon the following terms and conditions:

     A. Tenant shall give Landlord written notice of Tenant's exercise of this
Option to Extend not later than six (6) months prior to the scheduled Lease
Termination Date, which Termination Date is currently projected to be December
31, 2000, in which event the Lease shall be considered extended for an
additional five (5) years upon the same terms and conditions, absent this
Paragraph 48, and subject to the Basic Rental set forth below. In the event that
Tenant fails to timely exercise Tenant's option as set forth herein in writing,
Tenant shall have no further Option to Extend this Lease, and this Lease shall
continue in full force and effect for the full remaining term hereof, absent of
this Paragraph 48.

     B. The following summarizes the per square foot charge by period under the
Lease Agreement that would be applied to the Extended Term:

 
 
     Extended                        Monthly              
     Term Period          PSF Rate   Basic Rental         
     -----------          --------   ------------
                                                 
     01/01/01-12/31/01    $1.10      $43,072.70           
     01/01/02-12/31/02    $1.15      $45,030.55           
     01/01/03-12/31/03    $1.20      $46,988.40           
     01/01/04-12/31/04    $1.25      $48,946.25           
     01/01/05-12/31/05    $1.30      $50,904.10            


     C. The option rights of Tenant under this Paragraph 48, and the Extended
Term thereunder, are granted for Tenant's personal benefit and may not be
assigned or transferred by Tenant, except to a parent corporation, subsidiary
corporation, or corporation with which Tenant merges or consolidates or to whom
Tenant sells all or substantially all of its assets as provided for in Paragraph
56, either voluntarily or by operation of law, in any manner whatsoever. In the
event that Landlord consents to a sublease or assignment under Paragraph 19, the
option granted herein and any Extended Term thereunder shall be Void and of no
force and effect, whether or not Tenant shall have purported to exercise such
option prior to such assignment or sublease.

     D. INCREASED SECURITY DEPOSIT: In the event the Term of Tenant's Lease is
        --------------------------
extended pursuant to this Paragraph 48, Tenant's Security Deposit shall be
increased to equal twice the Basic Rental due for the last month of the Extended
Term (i.e. $50,904.10 per month X 2 = $101,808.20).

49.  FIRST RIGHT OF REFUSAL: Beginning with the thirty-sixth month of the Lease
     ----------------------
Term, and provided Tenant is not in default in any of the terms, covenants, and
conditions of this Lease Agreement, Tenant, during the Term of this Lease and
subject to the provisions hereinafter contained, shall have the First Right of
Refusal to lease approximately 12,043+ square feet of space as shown in Blue on
the attached Exhibit C, consisting of the remaining space on the first floor in
             ---------
the building in which the Leased Premises are located (hereinafter referred to
as "First Right Space") upon the following terms and conditions:


     A.   It is understood that said First Right Space is, as of the date of
this Lease, vacant and unleased. Landlord agrees that, after the thirty-sixth
month of the Lease Term, in the event Landlord receives an offer to lease said
First Right Space from a third party, rental and upon terms and conditions which
are satisfactory to Landlord, Landlord shall, prior to executing a lease
agreement with a third party for said First Right Space, offer said First Right



                                   Page 11 

 
Space to Tenant at the same Basic Rent per square foot rate as scheduled in this
Lease Agreement dated July 3l, 1995, as amended, between Landlord and Tenant,
and upon the same terms, covenants, and conditions outlined in this Lease
Agreement between Landlord and Tenant. If said third party lease offer is for a
period which extends beyond this Tenant's Lease Termination Date, Landlord shall
have the right to require Tenant's Lease Term be extended to coincide with the
termination of said third party lease, in which case Tenant's Basic Rent per
square foot rate shall be increased by $.05 per square foot on an annual basis,
commencing with the extended term or, Landlord may elect, at its sole and
absolute discretion, not to extend Tenant's Term. Tenant shall have five (5)
business days after receipt of said rental and terms and conditions in which to
accept said rental and terms and conditions in writing. In the event Tenant
rejects or fails to accept said rent, terms, and conditions and execute a lease
agreement for said First Right Space at the rental and upon the terms and
conditions so presented by Landlord within said five (5) business day period,
Tenant shall have no further First Right of Refusal and Landlord shall be free
to execute a lease with a third party without further obligation to Tenant with
respect to said First Right Space, and this Lease Agreement dated July 3 l, 1995
shall continue in full force and effect for the full remaining term hereof,
absent of this Paragraph 49.


     B.   The First Right of Refusal of Tenant under this Paragraph 49 is
granted for Tenant's personal benefit and may not be assigned or transferred by
Tenant, except to a parent corporation, subsidiary corporation, or corporation
with which Tenant merges or consolidates or to whom Tenant sells all or
substantially all of its assets as provided for in Paragraph 56, either
voluntarily or by operation of law, in any manner whatsoever. In the event that
Landlord consents to a sublease or assignment under Paragraph 19, the First
Right option granted herein shall be void and of no force and effect, whether or
not Tenant shall have purported to exercise such First Right option prior to
such assignment or sublease.

     C.   Notwithstanding the above, Landlord acknowledges that during the first
thirty-six (36) months of the Lease Term, Landlord shall not lease the First
Right Space to a third party tenant for a term that exceeds the first thirty-six
(36) months of the Lease Term. In the event Landlord enters into a third party
lease as described above during said thirty-six (36) month period, Tenant's
First Right of Refusal option shall be effective as of the termination date of
said third party lease, upon the terms and conditions set forth in Paragraph 49A
above.

50.  SECURITY DEPOSIT CONTINUED: Providing Tenant (i) is not in default
     --------------------------
(pursuant to Paragraph 22 of the Lease, i.e., Tenant has received notice and any
                                        ----
applicable cure period has expired without cure) of any of the terms, covenants,
and conditions of this Lease Agreement and (ii) pays all Basic Rent and
Additional Rent by the due date, as specified in Paragraph 4D and Paragraph 43,
during the first twelve months of the Lease Term, the maturity date of the
Promissory Note (representing one-half of Tenant's Security Deposit), shall be
extended to January l, 1998. Notwithstanding the above, in the event the
Promissory Note is extended pursuant to this Paragraph 50, said Promissory Note
shall be due in full immediately if: (i) Tenant subsequently fails to pay its
Basic Rent and/or Additional Rent by the due date and/or (ii) Tenant is in
default of the Lease at any time prior to January l, 1998.

51.  UTILITIES: It is understood that Tenant is the sole occupant of the
     ---------
building located at 2121 Tasman Drive, Santa Clara, of which the Leased Premises
is a part. Tenant agrees to be responsible for paying 100% of the utilities,
including, but not limited to, water, sewer, gas and electricity, for the entire
building until such time as the remaining vacant space in the building is
leased. Tenant agrees that the utilities for said building will be placed in
Tenant's name and that Tenant will pay all utilities directly to the respective
company(s). When any of the remaining vacant space in said building is leased,
Landlord will notify Tenant and Landlord will transfer all utilities into
Landlord's name and Tenant will pay its share of said utilities monthly in
advance as described in and subject to Paragraph 4 "Rent" and Paragraph 11
"Utilities of the Building in Which the Premises are Located" of this Lease.

52.  CONSENT: Whenever the consent of one party to the other is required
     -------
hereunder, such consent shall not be unreasonably withheld.

53.  HAZARDOUS MATERIALS: Landlord and Tenant agree as follows with respect to
     -------------------
existence or use of "Hazardous Materials" (as defined herein) on, in, under or
about the Premises and real property located beneath said Premises (hereinafter
collectively referred to as



                                    Page 12

 
the "Property") and the Complex:


As used herein, the term "Hazardous Materials" shall mean any hazardous or toxic
substance, material or waste which is or becomes subject to or regulated by any
local governmental authority, the State of California, or the United States
Government. The term "Hazardous Materials" includes, without limitation any
material or hazardous substance which is (i) listed under Article 9 or defined
as "hazardous" or "extremely hazardous" pursuant to Article 11 of Title 22 of
the California Administrative Code, Division 4, Chapter 30, (ii) listed or
defined as a "hazardous waste" pursuant to the Federal Resource Conservation and
Recovery Act, Section 42 U.S.C. Section 6901 et. seq., (iii) listed or defined
as a "hazardous substance" pursuant to the Comprehensive Environmental Response,
Compensation and Liability Act, 42 U.S.C. Section 9601 et. seq. (42 U.S.C.
Section 9601), (iv) petroleum or any derivative of petroleum, or (v) asbestos.

To the best of Landlord's knowledge, the Property, including all underlying land
and groundwater, are free from contamination by toxic or otherwise hazardous
substances; however, Landlord shall have no obligation to investigate. Subject
to the terms of this Paragraph 53, Tenant shall have no obligation to "clean
up", reimburse, release, indemnify, or defend Landlord with respect to any
Hazardous Materials or wastes which Tenant (prior to and during the term of the
Lease) or other parties on the Property or Complex, as described below, (during
the term of this Lease) did not store, dispose, or transport in, use, or cause
to be on the Property or which Tenant, its agents, employees, contractors,
invitees or its future subtenants and/or assignees (if any) (during the Term of
this Lease), did not store, dispose, or transport in, use or cause to be on the
Complex in violation of applicable law as stated below.

Tenant shall be 100 percent liable and responsible for: (i) any and all
"investigation and cleanup" of said Hazardous Materials contamination which
Tenant, its agents, employees, contractors, invitees or its future subtenants
and/or assignees (if any), or other parties on the Property, does store,
dispose, or transport in, use or cause to be on the Property, and which Tenant,
its agents, employees, contractors, invitees or its future subtenants and/or
assignees (if any) does store, dispose, or transport in, use or cause to be on
the Complex and Tenant shall not be responsible for such hazardous materials
contamination stored, disposed, transported in, used, or caused to be on the
Complex by other parties on the Complex, and (ii) any claims, including third
party claims, resulting from such Hazardous Materials contamination. Tenant
shall indemnify Landlord and hold Landlord harmless from any liabilities,
demands, costs, expenses and damages, including, without limitation, attorney
fees incurred as a result of any claims resulting from such Hazardous Materials
contamination.

Tenant also agrees not to use or dispose of any Hazardous Materials on the
Property or the Complex without first obtaining Landlord's written consent.
Tenant agrees to complete compliance with governmental regulations regarding the
use or removal or remediation of Hazardous Materials used, stored, disposed of,
transported or caused to be on the Property or the Complex as stated above, and
prior to the termination of said Lease Tenant agrees to follow the proper
closure procedures and will obtain a clearance from the local fire department
and/or the appropriate governing agency. If Tenant uses Hazardous Materials,
Tenant also agrees to install, at Tenant's expense, such Hazardous Materials
monitoring devices as Landlord deems reasonably necessary. It is agreed that the
Tenant's responsibilities related to Hazardous Materials will survive the
termination date of the Lease and that Landlord may obtain specific performance
of Tenant's responsibilities under this Paragraph 53.

54.  COMPLIANCE CONTINUED: Any non-conformance of the improvements installed and
     --------------------
paid for by Landlord as set forth on Exhibit B, required to be corrected by the
                                     ---------
governing agency, shall be corrected at the cost and expense of Landlord if such
non-conformance exists as of the Commencement Date of the Lease and further
provided that such governing agency's requirement to correct the non-conformance
is not initiated as a result of: (i) any future improvements made by or for
Tenant; or (ii) any permit request made to a governing agency by or for Tenant.
Any non-conformance of the Premises occurring after the Commencement Date of
this Lease Agreement shall be the responsibility of Tenant to correct at
Tenant's cost and expense.

Landlord agrees to amortize the cost of capital improvements necessitated by any
new laws, statutes, ordinances or governmental rules, regulations, or
requirements as an operating expense over the life of said improvement and
Tenant shall pay its pro rata share of said capital improvement cost based on
the remaining Term (and/or extended Term, if any) of the Lease. For example: (i)
Landlord incurs capital improvement costs of $10,000 one year prior to Lease



                                    Page 13

 
Termination Date, and (ii) said capital improvement's life is ton (10) years;
Tenant shall pay upon receipt of invoice from Landlord its pro rata share of
$1,000.00).

In the event the Term of the Lease is extended, pursuant to Paragraph 48 or by
any other agreement between Landlord and Tenant, Tenant's pro rata share of the
capital improvement cost shall be increased to include the additional amount
payable to Landlord due to the Extended Term of the Lease. For Example: In the
event: (i) Landlord incurred capital, improvement costs illustrated above; and
(ii) Tenant exercises its Option to Extend this Lease for an additional five (5)
year period, Tenant would be liable for an additional payment to Landlord of
$5,000.00 as Additional Rent. Said payment would be due in full immediately upon
Tenant's exercise of its Option to Extend.

55.   MAINTENANCE OF THE PREMISES: In addition to, and notwithstanding anything
      ---------------------------
to the contrary in Paragraph 10, Landlord shall maintain the structural shell,
foundation, and roof structure (but not the interior improvements, roof
membrane, or glazing) of the building leased hereunder at Landlord's cost and
expense provided Tenant has not caused such damage, in which event Tenant shall
be responsible for 100 percent of any such costs for repair or damage so caused
by the Tenant. Notwithstanding the foregoing, a crack in the foundation, or
exterior walls that does not endanger the structural integrity of the building,
or which is not life-threatening, shall not be considered material, nor shall
Landlord be responsible for repair of same.

56.   ASSIGNMENT AND SUBLETTING CONTINUED: In addition to and notwithstanding
      -----------------------------------
anything to the contrary in Paragraph 19 of this Lease, Tenant shall be entitled
to assign or sublet without Landlord's consent (but shall still give Landlord
notice thereof) to: (i) any parent or subsidiary corporation, or corporation
with which Tenant merges or consolidates, or (ii) any third party or entity to
whom Tenant sells all or substantially all of its assets; provided, that the net
worth of the resulting or acquiring corporation has a net worth after the
merger, consolidation or acquisition equal to or greater than the net worth of
Tenant at the time of such merger, consolidation or acquisition. No such
assignment or subletting will release the Tenant from its liability and
responsibility under this Lease to the extent Tenant continues in existence
following such transaction. Notwithstanding the above, Tenant shall be required
to (a) give Landlord written notice prior to such assignment or subletting to
any party as described in (i) and (ii) above, and (b) execute an acknowledgement
document prepared by Landlord reflecting the assignment or subletting.

57.   SALE OR CONVEYANCE BY LANDLORD (CONTINUED): Not withstanding anything to
      -----------------------------------------
the contrary in the Lease, if Landlord sells or otherwise conveys its interest
in the Premises, Landlord shall not be relieved of its obligation under the
Lease, unless and until the successor assumes in writing Landlord's obligations
under the Lease.

58.  ASSIGNMENT OF WARRANTIES: Upon Lease commencement and during the Term of
     ------------------------
the Lease, Landlord hereby assigns to Tenant all of Landlord's Contractor's
warranties specifically related to Tenant's Leased Premises and shall cooperate
with Tenant in enforcing any of such warranties except that Landlord shall not
be required to pay any legal fees or incur any expenses in this regard.

                     (THIS SPACE LEFT INTENTIONALLY BLANK)

                                             Initial: /s/ EW,JA
                                                      -------------------------

                                    Page 14

 

                     [GRAPHIC: FLOOR PLAN DEPICTING THREE
                        BUILDINGS IN WHICH PORTION OF 
                    BUILDING BEING LEASED IS HIGHLIGHTED.]



EXHIBIT A TO LEASE AGREEMENT DATED JULY 31, 1995 BY AND BETWEEN ARRILLAGA FAMILY
- ---------
TRUST AND RICHARD T. PEERY SEPERATE PROPERTY TRUST, AS LANDLORD, AND LATITUDE 
COMMUNICATIONS, AS TENANT.


GUADELUPE A

 
EXHIBIT B TO LEASE AGREEMENT DATED JULY 31, 1995 BY AND BETWEEN THE ARRILLAGA
- ---------
FAMILY TRUST AND THE RICHARD T. PEERY SEPARATE PROPERTY TRUST, AS LANDLORD, AND
LATITUDE COMMUNICATIONS, AS TENANT.

TENANT IMPROVEMENT SPECIFICATIONS
- ---------------------------------
Responsible Party (L = Landlord; T = Tenant)

DOORS:
- ------

L    Building standard, solid core veneer (ash) three foot by 9'-0" doors and
     frames to comply with all necessary fire ratings as required. Doors stained
     and sealed to match architect's finish selection. Schlage or equal door
     lever hardware in polished stainless steel finish, provide all necessary
     hardware.


L    New roll up door to be installed in Manufacturing area (per drawing).

L    Provide locksets on ten (10) doors.

T    Provide locksets on any doors over the ten (10) doors to be furnished by
     Landlord.

T    Provide Card Key access for the doors leading to the restroom core area (if
     desired).

PARTITIONS AND GLAZING:
- -----------------------

L    Provide layout per drawing. All interior partitions shall be 3 1/2", metal
     studs with 5/8" drywall each side. Provide approximately 20 LF of Herc.
     glass and double doors in the board room.


CEILING:
- --------

L    2'x 4' ceiling grid system (with 2'x 2' "second look" tile). 9' 0" FF. with
     standard ceiling tile in open staff areas, offices, lounges, etc.


WINDOW COVERING:
- ----------------

T    All perimeter windows shall receive vertical blind window treatment.

MILLWORK:
- ---------

L    As indicated on drawings, in utility areas, all exposed surfaces to be
     plastic laminate.



(2 of 2)

 
FLOOR-COVERING:
- ---------------

L    Carpet Border: In conference room and lobby: Shaw or approved equivalent.
     All carpet to be glue down, base is to be 2 1/2" rubber. Lunch room,
     coffee/copy, lab, supply rooms and data room shall have 12" x 12" Vinyl
     tile. Provide allowance for granite or ceramic tile in the lobby area.

HVAC:
- -----

L    Predicated on population density and equipment, and lighting levels,
     Landlord shall design and install a complete building standard and
     supplemental heating, cooling and ventilation system. Separate zone control
     shall be provided for the conference rooms, and any other areas deemed
     necessary by the mechanical engineers.

     * Assume that each desk, workstation, office, etc. shall eventually receive
     a Macintosh or IBM personal computer at an average of 300 watts of power.
     HVAC calculations shall assume a 100% operating demand for any given time
     period (based on 250 square feet per person load).

L    In all occupied areas, exhaust and supply fresh air conditioning to the
     latest accepted standards as set forth by the American Society of Heating,
     Refrigeration, Air Conditioning and Engineers.

T    Upgrade HVAC systems to be capable of accommodating 110% of equipment heat
     loads within any one room (10% safety margin) - if requested.

T    Provide a remote motor ducted exhaust fan in all conference rooms.

T    Lab area is to be on a dedicated zone with 24 hour operation; suitable to
     accommodate electrical load in the lab.

T    Any other requirements above those provided for by Landlord above.

LIGHTING/ELECTRICAL AND DATA:
- -----------------------------

L    For all lighting, switch each room and/or area separately. Provide slide
     bar dimmer switches on incandescent downlights in conference rooms.

L    Florescent lighting shall be illuminated with 2'x 4' lamp parabolic
     fixtures (recessed) or approved equal throughout the space. Upgrade lights
     to be installed in the boardroom, lunchroom and sconce type fixtures to be
     installed in the stairways.

L    In addition to building standard lighting, additional fluorescent lighting
     shall be




(2 of 2)

 
     installed so as to initially allow 80' candle lighting at all remaining
     conference room, offices, and open office areas.

L    Provide all necessary exit and emergency lighting as required. All lighting
     to comply with local and state title 24 requirements.

L    All conference rooms shall have one phone and two electrical outlets each.

L    Open office area is to receive J-boxes above the suspended ceiling system
     24'-0" on center for open office cubicles. Each office cubicle is to be
     capable of having one phone/data and two electrical outlets. All Hardwall
     offices are to have two electrical outlets and two phone/data outlets. The
     data and lab areas are to have two electrical and two data outlets per
     wall.

L    Provide separate circuit outlets at all copiers and lounge areas as
     required in locations to be specified by Tenant.

L    Provide all necessary electrical components including panels, transformers,
     as required.

T    Provide occupancy switch sensors by "Novitas" or approved equal for all
     offices.

T    Hook up electrical to furniture provided by Tenant.

T    Provide separate circuit outlets for any sensitive equipment.

T    The lab area is to have a total of thirty 120 volt 20 amp single phase
     circuits with 26 of those circuits being duplex. Install 8 cord drops 48"
     from the finish floor. Provide additional panel capacity for 40% growth
     serving this area.

L    The lunch room will require sufficient electrical capacity to service
     additional vending equipment that Tenant may elect to install at their
     expense.

TELEPHONE:
- ----------

T    All offices, workstations, secretary and conference areas shall be wired
     for data and to telephone room for network connections. Outlets to receive
     modular receptacles for both telephone and data (Tenant to provide
     requirements)

T    Design, engineer, furnish and install a empty conduit stub - ups as may be
     required to install tenant telephone and data system wiring as noted above,
     including all necessary back boards and electrical outlets.

DATA PROCESSING:
- ----------------




(2 of 2)

 
T    Provide conduit and power feeds as required for internal accounting, word
     processing computer systems and PC rooms. Power feeds for c.p.u.'s must be
     dedicated, isolated grounded outlets.

PLUMBING:
- ---------

L    Engineer, furnish and install at the lunch room, a stainless steel sink
     with goose neck faucet. Hot and cold running water. Water taps and for ice
     maker and coffee maker (which will be provided by Tenant).

L    Provide an 120 gallon water heater.

L    Men's and women's toilet rooms to comply with local, California and ADA
     codes and requirements as required.

FIRE PROTECTION:
- ----------------

T    Provide fire alarm system and fire monitoring system.

MISCELLANEOUS:
- --------------

L    Exterior entry way is to be upgraded and re-worked per the requirements of
     Tenant.


                                            Initial: /s/ EW, JA
                                                     -------------------------  

(2 of 2)

 
                                                                     Guadalupe A

                                AMENDMENT NO.1
                                   TO LEASE

     THIS AMENDMENT NO 1  is made and entered into this December 22, 1998, by
and between JOHN ARRILLAGA, Trustee, or his Successor Trustee UTA dated 7/20/77
(JOHN ARRILLAGA SURVEYOR'S TRUST) (previously known as the "Arrillaga Family
Trust") as amended, and RICHARD T. PEERY, Trustee, or his Successor Trusty UTA
dated 7/20/77 (RICHARD T. PEERY SEPARATE PROPERTY TRUST) as amended,
collectively as LANDLORD, and LATTITUTE COMMUNICATIONS, a California
corporation, as TENANT.

                                    RECITALS

     A.   WHEREAS, by Lease Agreement dated July 31, 1995 Landlord leased to
Tenant approximately 39,157+ square feet of that certain 51,200+ square foot
                           -                                   -            
building located at 2121 Tasman Drive, Santa Clara, California, the details of
which are more particularly set forth in said July 31, 1995 Lease Agreement, and

     B.   WHEREAS, said Lease was amended by the Commencement Letter dated
December 13, 1995 which changed the Commencement Date of the Lease from January
1, 1996 to December 1, 1995, and confirmed the Termination Date of December 31,
2000, and,

     C.  WHEREAS, it is now the desire of the parties hereto to amend the Lease
by (i) increasing the square footage of the Leased Premises effective June1,
1999, (ii) amending the Basic Rent schedule and Aggregate Rent accordingly,
(iii) increasing the Security Deposit required under the Lease, (iv) increasing
Tenant's non-exclusive parking spaces, (v) amending the Lease Paragraphs 19
("Assignment and Subletting") and 48 ("Option to Extend Lease for Five (f)
Years"), (vi) replacing Lease Paragraphs 7 ("Expenses of Operation, Management,
and Maintenance"), 11 ("Utilities of the Building in Which the Premises are
Located"), 39 ("Limitation of Liability"), (vii) deleting Lease Paragraphs 49
("First Right of Refusal") and 51 ("Utilities"), and (viii) adding paragraphs
("Choice of Law: Severability") and (Authority to Execute") to said Lease
Agreement as hereinafter set forth.

                                   AGREEMENT

       NOW THEREFORE, for valuable consideration, receipt of which is hereby
acknowledged, and in consideration of the hereinafter mutual promises, the
parties hereto do agree as follows:

       1. INCREASED PREMISES: Effective June 1, 1999, the size of the Leased
          ------------------                                                
Premises will be increased by 12,043+ square feet, or from 39,157+ square feet
                                    -                            -            
to 51,200+ square feet of space (one hundred percent of the Building).  Total
         -                                                                   
said Premises are more particularly shown within the area outlined in Red on
                                                                            
Exhibit A.  The entire parcel, of which the Leased Premises is a part, is shown
- ---------                                                                      
within the area outlined in Green on Exhibit A.  The additional 12,043+ square
                                     ---------                        -       
feet of space is leased on an "as-is" basis, in its present condition and
configuration, as set forth in blue on Exhibit B attached hereto, with the
                                       ---------                          
entire interior leased Premises shown in Red on Exhibit B.
                                                --------- 

       2. BASIC RENT SCHEDULE:  The Basic Rent schedule, as shown in Paragraph
          -------------------                                                 
4(A) of the Lease Agreement, shall be amended as follows:

       On June 1, 1999, the sum of FIFTY ONE THOUSAND TWO HUNDRED AND NO/100
DOLLARS ($51,200.00) shall be due, and a like sum on the first day of each month
thereafter, through and including December 1, 1999.

       On January 1, 2000, the sum of FIFTY THREE THOUSAND SEVEN HUNDRED SIXTY
AND NO/100 DOLLARS ($53,760.00) shall be due, and a like sum on the first day of
each month thereafter, through and including December 1, 2000.

       As a result of the increase in square feet leased, the Aggregate Rental
shall be increased by $236,042.80, or from $2,231,949.00 to $2,467,991.80.

                                                           Initial: 
                                                                   --------

 
                                                                     Guadalupe A
 
       3.  INCREASED PARKING:  Effective June 1, 1999, Tenant's nonexclusive
           -----------------                                                
parking spaces shall be increased by 45 spaces or from 144 spaces to 189 spaces.

       4.  SECURITY DEPOSIT:  Tenant's Security Deposit shall be increased by
           ----------------
$25,290.30, or from $82,229.70 to $107,520.00, payable upon Tenant's execution
of this Amendment No. 1.

       5.  ASSIGNMENT AND SUBLETTING: Lease Paragraph 19 ("Assignment and
           -------------------------                                     
Subletting") shall be amended to include the following language:

       "A. Notwithstanding the foregoing, Landlord and Tenant agree that it
shall not be unreasonable for Landlord to refuse to consent to a proposed
assignment, sublease or other transfer ("Proposed Transfer") if the Premises or
any other portion of the Property would become subject to additional or
different Government Requirements as a direct or indirect consequence of the
Proposed Transfer and/or the Proposed Transferee's use and occupancy of the
Premises and the Property.  However, Landlord may, in its sole discretion,
consent to such a Proposed Transfer where Landlord is indemnified by Tenant and
(i) Subtenant or (ii) Assignee, in form and substance satisfactory to Landlord's
counsel, by Tenant and/or the Proposed Transferee from and against any and all
costs, expenses, obligations and liability arising out of the Proposed Transfer
and/or the Proposed Transferee's use and occupancy of the Premises and the
Property.

       B.   Any and all sublease agreement(s) between Tenant and any and all
subtenant(s) (which agreements must be consented to by Landlord, pursuant to the
requirements of this Lease) shall contain the following language:

       "If Landlord and Tenant jointly and voluntarily elect, for any reason
     whatsoever, to terminate the Master Lease prior to the scheduled master
     Lease termination date, then this Sublease (if then still in effect) shall
     terminate concurrently with the termination of the Master Lease.  Subtenant
     expressly acknowledges and agrees that (1) the voluntary termination of the
     master Lease by Landlord and Tenant and the resulting termination of this
     Sublease shall not give Subtenant any right or power to make any legal or
     equitable claim against Landlord, including without limitation any claim
     for interference with contract or interference with prospective economic
     advantage, and (2) Subtenant hereby waives any and all rights it may have
     under law or at equity against Landlord to challenge such an early
     termination of the Sublease, and unconditionally releases and relieves
     landlord, and its officers, directors, employees and agents, from any and
     all claims, demands, and/or causes of action whatsoever (collectively,
     "Claims"), whether such matters are known or unknown, latent or apparent,
     suspected or unsuspected, foreseeable or unforseeable, which Subtenant may
     have arising out of or in connection with any such early termination of
     this Sublease. Subtenant knowingly and intentionally waives any and all
     protection which is or may be given by Section 1542 of the California Civil
     Code which provides as follows: "A general release does not extend to
     claims which the creditor does not know or suspect to exist in his favor at
     the time of executing the release, which if known by him must have
     materially affected his settlement with debtor.

       The term of this Sublease is therefor subject to early termination.
     Subtenant's initials here below evidence (Subtenant's consideration of and
     agreement to this early termination provision, (b) Subtenant's
     acknowledgement that, in determining the net benefits to be derived by
     Subtenant under the terms of this Sublease, Subtenant has anticipated the
     potential for early termination, and (c) Subtenant's agreement to the
     general waiver and release of Claims above.


       Initials: _______    Initials:________"
                Subtenant             Tenant

       6.  OPTION TO EXTEND LEASE FOR FIVE (5) YEARS: Due to the increase in the
           -----------------------------------------                            
square footage of the Leased Premises, Section B of Lease Paragraph 48 ("Option
to Extend Lease for Five (5) Years") is hereby deleted and replaced with the
following:

       B.  The following summarizes the per square foot charge by period under
           the Lease Agreement that would be applied to the Extended Term:

                                                          Initial:
                                                                  --------

 
                                                                     Guadalupe A
 


- --------------------------------------------------------------------------------------------
          Extended                       PSF Rate                   Monthly
        Term Period                                                 Basic Rent
- --------------------------------------------------------------------------------------------
- --------------------------------------------------------------------------------------------
                                                              
01/01/01-12/31/01                        $1.10                      $56,320.00
- --------------------------------------------------------------------------------------------
01/01/01-12/31/02                        $1.15                      $58,880.00
- --------------------------------------------------------------------------------------------
01/01/03-12/31/03                        $1.20                      $61,440.00
- --------------------------------------------------------------------------------------------
01/01/04-12/31/04                        $1.25                      $64,000.00
- --------------------------------------------------------------------------------------------
01/01/05-12/31/05                        $1.30                      $66,560.00
- --------------------------------------------------------------------------------------------


       7.  EXPENSES OF OPERATION, MANAGEMENT, AND MAINTENANCE OF THE COMMON
           ----------------------------------------------------------------
AREAS OF THE COMPLEX AND BUILDING IN WHICH THE PREMISES ARE LOCATED: Effective
- -------------------------------------------------------------------           
June 1, 1999, Tenant shall occupy one hundred percent (100%) of the Building in
which the Premises are located, and as a result, Lease Paragraph 7 shall be
deleted in its entirety and replaced with the following:

       "7. EXPENSES OF OPERATION, MANAGEMENT, AND MAINTENANCE OF THE COMMON
AREAS OF THE COMPLEX:  As Additional Rent and in accordance with Paragraph 4D of
this Lease, Tenant shall pay to Landlord Tenant's proportionate share
(calculated on a square footage or other equitable basis as calculated by
Landlord) of all expenses or operation, management, maintenance and repair of
the common Areas of the Complex including, but not limited to, license, permit,
and inspection fees; security; utility charges associated with exterior
landscaping and lighting (including water and sewer charges); all charges
incurred in the maintenance and replacement of landscaped areas, lakes, parking
lots and paved areas (including repair, replacement, resealing and restriping),
sidewalks, driveways; maintenance, repair, and replacement of all fixtures and
electrical, mechanical and plumbing systems; structural elements and exterior
surfaces of the buildings; salaries and employees benefits of personnel and
payroll taxes applicable thereto; supplies, materials, equipment and tools; the
cost of capital expenditures which have the effect of reducing operating
expenses, provided, however, that in the event Landlord makes such capital
improvements, Landlord may amortize its investment in said improvements
(together with interest at the rate of fifteen percent (15%) per annum on the
unamortized balance) as an operating expense in accordance with standard
accounting practices, provided, that such amortization is not at a rate greater
than the anticipated savings in the operating expenses.

       "Additional Rent" as used herein shall not include Landlord's debt
repayments, interest on charges; expenses directly or indirectly incurred by
Landlord for the benefit of any other tenant; cost for the installation of
partitioning or any other tenant improvements; cost of attracting tenants;
depreciation; interest or executive salaries."

       8.  TENANT MAINTENANCE: Effective June 1, 1999, Tenant shall occupy one
           ------------------                                                 
hundred percent (100%) of the building in which the Premises are located, and as
a result, Lease Paragraph 10 shall be deleted in its entirety and replaced with
the following:

                                                            Initial:
                                                                    --------

 
                                                                     Guadalupe A
 
"10.  TENANT MAINTENANCE.  Tenant shall, at its sole cost and expense, keep and
maintain the Premises (including appurtenances) and every part thereof in a high
standard of maintenance and repair, or replacement, and in good and sanitary
condition.  Tenant's maintenance and repair responsibilities herein referred to
include, but are not limited to, janitorization, all windows (interior and
exterior), window frames, plate glass and glazing (destroyed by accident or act
of third parties), truck doors, plumbing systems (such as water and drain lines,
sinks, toilets, faucets, drains, showers and water fountains), electrical
systems (such as panels, conduits, outlets, lighting fixtures, lamps, bulbs,
tubes and ballasts), heating and air conditioning systems (such as compressors,
fans, air handlers, ducts, mixing boxes, thermostats, time clocks, boilers,
heaters, supply and return grills), structural elements and exterior surfaces of
the building, store fronts, roofs, downspouts, all interior improvements within
the Premises including but not limited to wall coverings, window coverings,
carpet, floor coverings, partitioning, ceilings, doors (both interior and
exterior), including closing mechanisms, latches, locks, skylights (if any),
automatic fire extinguishing systems, and elevators and all other interior
improvements of any nature whatsoever. Tenant agrees to provide carpet shields
under all rolling chairs or to otherwise be responsible for wear and tear of the
carpet caused by such rolling chairs if such wear and tear exceeds that caused
by normal foot traffic in surrounding areas. Areas of excessive wear shall be
replaced at Tenant's sold expense upon Lease termination. Tenant hereby waives
all rights under, and benefits of, Subsection 1 of Section 1932 and Section 1941
and 1942 of the California Civil code and under any similar law, statute or
ordinance now or hereafter in effect.  In the event any of the above maintenance
responsibilities apply to any other tenant(s) of Landlord where there is common
usage with other tenant(s), such maintenance responsibilities and charges shall
be allocated to the Leased Premises by square footage or other equitable basis
as calculated and determined by Landlord."

                                                            Initial:
                                                                    ---------

 
                                                                     Guadalupe A
 
      9.  UTILITIES OF THE BUILDING IN WHICH THE PREMISES ARE LOCATED: Effective
          -----------------------------------------------------------
          June 1, 1999, Tenant shall occupy one hundred percent (100%) of the
          Building in which the Premises are located, and as a result, Lease
          Paragraph 11 shall be deleted in its entirety and replaced with the
          following:

          "11.   UTILITIES. Tenant shall have all utilities servicing the
          Premises transferred into Tenant's name effective June1, 1999. Tenant
          shall pay promptly, as the same become due, all charges for water,
          gas, electricity, telephone, telex and other electronic communication
          service, sewer service, waste pick-up and any other utilities,
          materials or services furnished directly to or used by Tenant on or
          about the Premises during the Term of this Lease, including, without
          limitation, any temporary or permanent utility surcharge or other
          exactions whether or not hereinafter imposed. In the event the above
          charges apply to any other tenant(s) of Landlord where there is common
          usage with other tenant(s), such charges shall be allocated to the
          Leased Premises by square footage or other equitable basis as
          calculated and determined by Landlord.

              Landlord shall not be liable for and Tenant shall not be entitled
          to any abatement or reduction of Rent by reason of any interruption or
          failure of utility services to the Premises when such interruption or
          failure is caused by accident, breakage, repair, strikes, lockouts, or
          other labor disturbances or labor disputes of any nature, or by any
          other cause, similar or dissimilar, beyond the reasonable control of
          Landlord."

     10.  LIMITATION OF LIABILITY: Lease Paragraph 39 ("Limitation of
          Liability") shall be deleted and replaced in its entirety by the
          following:

     "39. LIMITATION OF LIABILITY  In consideration of the benefits accruing
          -----------------------                                           
     hereunder, Tenant and all successors and assigns covenant and agree that,
     in the event of any actual or alleged failure, breach or default hereunder
     by Landlord:

(i)    the sole and exclusive remedy shall be against Landlord's interest in the
         Premises leased herein;
(ii)   no partner of Landlord shall be sued or named as a party in any suit or
         action (except as may be necessary to secure jurisdiction of the
         partnership);
(iii)  no service of process shall be made against any partner of Landlord
         (except as may be necessary to secure jurisdiction of the partnership);
(iv)   no partner of Landlord shall be required to answer or otherwise plead to
         any service of process;
(v)    no judgment will be taken against any partner of Landlord;
(vi)   any judgment taken against any partner of Landlord may be vacated and set
         aside at any time without hearing;
(vii)  no writ of execution will every be levied against the assets of any
         partner of Landlord;
(viii) these covenants and agreements are enforceable both by Landlord and also
         by any partner of Landlord.

       Tenant agrees that each of the foregoing covenants and agreements shall
       be applicable to any covenant or agreement either expressly contained in
       this Lease or imposed by stature or at common law."

       11.  RIGHT OF FIRST REFUSAL: It is agreed between the parties that Lease
            ----------------------                                             
Paragraph 49 ("First Right of Refusal") is hereby deleted in its entirety and
shall be of no further force or effect.

       12.  UTILITIES: It is agreed between the parties that Lease Paragraph 51
("Utilities") is hereby deleted in its entirety and shall be of no further force
or effect.

       13.  CHOICE OF LAW: SEVERABILITY. This Lease shall in all respects be
            ---------------------------                                     
governed by and construed in accordance with the laws of the State of
California.  If any provisions of this Lease shall be invalid, unenforceable, or
ineffective for any reason whatsoever, all other provisions hereof shall be and
remain in full force and effect.

                                                               Initial:
                                                                       --------

 
                                                                     Guadalupe A
 
     14.  AUTHORITY TO EXECUTE.  The parties executing this Agreement hereby
          --------------------                                              
warrant and represent that they are properly authorized to execute this
Agreement and bind the parties on behalf of whom they execute this Agreement and
to all of the terms, covenants and conditions of this Agreement as they relate
to the respective parties hereto.

     EXCEPT AS MODIFIED HEREIN, all other terms, covenants, and conditions of
said July 31, 1995 Lease Agreement shall remain in full force and effect.

     IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment No. 1
to Lease as of the day and year last written below.

LANDLORD:                                TENANT:

JOHN ARRILLAGA SURVIVOR'S TRUST LATTITUDE COMMUNICATIONS
                                         A California corporation

By                                      
  --------------------------                ---------------------------
  John Arrillaga, Trustee                
                                         ------------------------------
                                         Print or Type Name
Date: 
     ------------------------

RICHARD T. PEERY SEPARATE                Title:
PROPERTY TRUST                                 --------------------
                                         Date: 
                                               --------------------

By
   ---------------------------
   Richard T. Peery, Trustee

Date: 
      -------------------------


 
                                                                     Guadalupe A

 
                                 [GRAPHIC: MAP
                        ENTIRE PARCEL OF WHICH PREMISES
                       LEASED UNDER AGREEMENT IS A PART.
                      BUILDING LEASED UNDER THE AGREEMENT
                       IS HIGHLIGHTED.  THE MAP DEPICTS
                     THREE SQUARE-SHAPED BUILDINGS ARRANGED
                          IN A DIAGONAL PATTERN FROM
                    UPPER LEFT TO LOWER RIGHT.  SURROUND THE
                      BUILDINGS ARE LINES THAT REPRESENT
                      PARKING SPACES.  TO THE LEFT OF THE
                      BUILDINGS IS A CURVING LINE LABELED
                        "FUTURE TASMAN DRIVE."  IN THE
                         UPPER CORNER OF THE MAP IS A
                    CURVING LINE LABELED "CALLE DE LUNA."]


                              EXHIBIT A TO AMENDMENT NO.1 DATED DECEMBER 22,
                              ---------                                     
                              1998 BY AND BETWEEN THE JOHN ARRILLAGA SURVIVOR'S
                              TRUST AND THE RICHARD T. SEPARATE PROPERTY TRUST,
                              AS LANDLORD, AND LATTITUDE COMMUNICATIONS, AS
                              TENANT.

                                                      Initial:
                                                              --------

 
                                                                     Guadalupe A
 
              [GRAPHIC: INTERIOR FLOOR PLAN OF THE SECOND FLOOR 
                 OF BUILDING BEING LEASED SHOWING LOCATION OF
               CONFERENCE ROOMS, ENGINEERING AND TESTING AREAS 
             AND OTHER COMMON FACILITIES.  IN EACH CORNER OF THE
                 FLOORPLAN ARE TWO OR THREE CONFERENCE ROOMS,
            WITH THREE ADDITIONAL CONFERENCE ROOMS ALIGNED ALONG
             THE LEFT WALL.  AT THE LEFT AND RIGHT CENTERS OF THE
            FLOORPLAN ARE STAIRWAYS.  THE CENTER OF THE FLOORPLAN
               CONTAINS ROOMS LABELED "LAB,", "COPY," "SHOWER,"
              "MEN," "WOMEN," "LUNCHROOM," "AUDIO RM," "DATA RM"
                  AND "VESTIBULE."  THE ENTIRE FLOORPLAN IS
                RECTANGULAR AND MARKED BY A GRID WITH LETTERS
                  ON ONE AXIS AND NUMBERS ON THE OTHER AXIS.
            EACH ROOM IS MARKED BY SYMBOLS AND NUMBERS INDICATING
                ROOM NUMBERS, WALLS, FINISH MATERIALS, DOORS,
               WINDOWS AND HARDWARE.  A LEGEND TO THESE SYMBOLS
                     IS SET FORTH AT THE TOP OF THE PAGE.]


                              EXHIBIT B TO AMENDMENT NO.1 DATED DECEMBER 22,
                              ---------                                     
                              1998 BY AND BETWEEN THE JOHN ARRILLAGA SURVIVOR'S
                              TRUST AND THE RICHARD T. SEPARATE PROPERTY TRUST,
                              AS LANDLORD, AND LATTITUDE COMMUNICATIONS, AS
                              TENANT.
                                             2121 TASMAN DRIVE
                                             SANTA CLARA, CA


                                                      Initial:
                                                              --------

 
                                                                     Guadalupe A


               [GRAPHIC: INTERIOR FLOOR PLAN OF THE FIRST FLOOR
                       OF BUILDING BEING LEASED IN WHICH
                      ADDITIONAL SPACE BEING LEASED UNDER
                 AMENDMENT NO. 1 IS HIGHLIGHTED.  THE ENTIRE
                FLOORPLAN IS RECTANGULAR AND MARKED BY A GRID
              WITH LETTERS ON ONE AXIS AND NUMBERS ON THE OTHER
              AXIS.  THE TOP PORTION OF THE FLOOR PLAN IS MARKED
               "MANUFACTURING," WITH ROOMS LABELED "CONFERENCE"
                 AND "UTILITY RM" AT THE UPPER RIGHT CORNER.
               IN THE CENTER OF THE FLOORPLAN ARE ROOMS LABELED
             "LOBBY," "CONFERENCE," "VESTIBULE," "MAIL/STORAGE,"
          "DATA ROOM," "MEN" AND "WOMEN," AS WELL AS TWO STAIRWELLS.
                 THE LOWER PORTION OF THE FLOORPLAN CONTAINS
              APPROXIMATELY 23 ROOMS MARKED "OFFICE," AS WELL AS
                 ROOMS MARKED "CONF RM," "LOBBY," "COMM RM," 
                         "DOC CONTROL" AND "COPY RM."]




                              EXHIBIT B TO AMENDMENT NO.1 DATED DECEMBER 22,
                              ---------                                     
                              1998 BY AND BETWEEN THE JOHN ARRILLAGA SURVIVOR'S
                              TRUST AND THE RICHARD T. SEPARATE PROPERTY TRUST,
                              AS LANDLORD, AND LATTITUDE COMMUNICATIONS, AS
                              TENANT.

                                                      Initial:
                                                              --------