Exhibit 10.10


                              AGREEMENT OF LEASE

                                    BETWEEN

                   SOUTH BRUNSWICK INVESTORS, L.P. (LANDLORD)

                                      AND

                  TELEPORT COMMUNICATIONS GROUP INC. (TENANT)



                            DATED February 20, 1996










                               AGREEMENT OF LEASE
                                    BETWEEN
                    SOUTH BRUNSWICK INVESTORS, L.P. (LANDLORD)
                                      AND
                   TELEPORT COMMUNICATIONS GROUP INC. (TENANT)

                           DATED February 20, 1996


                              TABLE OF CONTENTS
                              -----------------

SECTION  TITLE                                                  PAGE NO.
- -------  -----                                                  --------
     1.   DEMISED PREMISES.........................................  1

     2.   LEASE TERM...............................................  1

     3.   FIXED RENT...............................................  1

     4.   ADDITIONAL RENT..........................................  2

     5.   USE OF DEMISED PREMISES..................................  3

     6.   COMPLETION OF DEMISED PREMISES...........................  4

     7.   ALTERATIONS OR IMPROVEMENTS BY TENANT....................  4

     8.   COVENANTS OF LANDLORD....................................  7

     9.   COVENANTS OF TENANT......................................  9

     10.  ASSIGNMENT AND SUBLETTING................................ 13

     11.  EMINENT DOMAIN........................................... 14

     12.  CASUALTY DAMAGE.......................................... 15


                                      (i)




     13.  INSURANCE; INDEMNIFICATION OF LANDLORD; WAIVER OF
            SUBROGATION............................................ 17

     14.  INSPECTION; ACCESS; CHANGES IN BUILDING FACILITIES....... 18

     15.  DEFAULT.................................................. 19

     16.  LANDLORD'S REMEDIES...................................... 20

     17.  LANDLORD'S RIGHT TO CURE TENANT'S DEFAULT................ 22

     18.  TENANT'S REMEDIES........................................ 22

     19.  ESTOPPEL CERTIFICATE..................................... 22

     20.  HOLDING OVER............................................. 22

     21.  SURRENDER OF DEMISED PREMISES............................ 22

     22.  SUBORDINATION, ATTORNMENT AND NONDISTURBANCE............. 23

     23.  BROKERS.................................................. 24

     24.  NOTICES.................................................. 24 

     25.  [INTENTIONALLY OMITTED].................................. 25

     26.  TERMINATION OPTION....................................... 26

     27.  FIRST OPTION SPACE....................................... 26

     28.  SECOND OPTION SPACE...................................... 29

     29.  RENEWAL TERMS............................................ 31


                                     (ii)




     30.  SIGNS.................................................... 32

     31.  PARKING.................................................. 32

     32.  ARBITRATION.............................................. 33

     33.  ADDITIONAL RIGHTS OF TENANT.............................. 34

     34.  BUILDING 2 SECURITY...................................... 36

     35.  RESTRICTIONS ON OTHER TENANTS IN THE BUILDINGS........... 37

     36.  MISCELLANEOUS............................................ 37


                               List of Exhibits
                               ----------------

     Exhibit "A":   Plan of Demised Premises and Option Areas
     Exhibit "B":   Rent Schedule
     Exhibit "C":   Taxes, Operating Expense and Other Additional Rent
     Exhibit "D":   Schedule of Landlord's Work
     Exhibit "E":   Janitorial Specifications
     Exhibit "F":   Rules and Regulations
     Exhibit "G":   Tenant Estoppel Certificate and Statement
     Exhibit "H":   Property Environmental Status
     Exhibit "I":   HVAC Specifications
     Exhibit "J":   Holidays
     Exhibit "K":   Plan of Project and Parking Areas
     Exhibit "L":   Tenant Work
     Exhibit "M":   Form of Subordination, Non-disturbance and Attornment
                    Agreement




                                     (iii)




                              AGREEMENT OF LEASE

     THIS AGREEMENT OF LEASE ("Lease") is made this 20th day of February, 1996,
by and between SOUTH BRUNSWICK INVESTORS, L.P., a Delaware limited 
partnership ("Landlord") and TELEPORT COMMUNICATIONS GROUP INC., a Delaware 
corporation ("Tenant"). 

     Intending to be legally bound, Landlord and Tenant agree as set forth 
below.

1.   DEMISED PREMISES.  Landlord, for the term and subject to the provisions 
and conditions hereof, leases to Tenant, and Tenant rents from Landlord, the 
space (the "Demised Premises") containing 87,550 rentable square feet shown 
on Exhibit "A" attached hereto and made a part hereof, in the buildings (the 
"Buildings") erected on Lot #1 (the "Land") as shown on Exhibit "K", which 
Land is depicted on that certain subdivision plan entitled "Plan of Minor 
Subdivision" prepared by Ezra Golub Associates and recorded in the Clerk's 
Office of Middlesex County in Book 4300, page 868 (the "Plan"), and which 
comprises a portion of the South Brunswick Corporate Center, 431 Ridge Road, 
Dayton, New Jersey (the "Project"), together with rights of ingress and 
egress thereto, and with the right in common with others to use, to the 
extent applicable, the elevators and common lobbies, loading docks, 
passageways, stairways and vestibules, and to pass over and park on those 
areas designated by Landlord for tenant parking.  The Buildings contain 
142,385 rentable square feet and are depicted as Building 2 ("Building 2") 
and Building 4 (the "UPS Building") on the Plan.

2.   LEASE TERM.  The Lease Term (the "Lease Term") shall commence on July 1, 
1996 (the "Commencement Date") and shall continue until December 31, 2006, 
unless extended or sooner terminated as provided herein.

     The first lease year of the Lease Term shall commence on the 
Commencement Date and shall end (i) on the day immediately preceding the 
first anniversary of the Commencement Date, if the Commencement Date is the 
first day of the month, or (ii) on the last day of the month in which the 
first anniversary of the Commencement Date occurs, if the Commencement Date 
is any day other than the first day of a calendar month.  Each subsequent 
lease year shall be a period of twelve months, commencing on the day 
immediately following the expiration of the prior lease year and expiring on 
the day immediately preceding the anniversary of the commencement of such 
lease year.  

3.   FIXED RENT.  Fixed rent (the "Fixed Rent") is payable by Tenant 
beginning on the Commencement Date in monthly installments equal to 
one-twelfth (1/12th) of the total annual Fixed Rent (the "Annual Fixed Rent") 
payable for the applicable Lease Year as set forth in Exhibit "B" attached 
hereto, without prior notice or demand, and without any setoff or deduction 
whatsoever, in advance, on the first day of each month at such place as 
Landlord may direct, except that the Fixed Rent for the first full month of 
the Lease Term will be paid on the date of execution of this Lease.  The 
Annual Fixed Rent set forth herein is an





annualized amount.  In addition, if the Lease Term commences on a day other 
than the first day of a calendar month, Tenant shall pay to Landlord, on or 
before the Commencement Date of the Lease Term, a pro rata portion of the 
monthly installment of rent (including Fixed Rent and any Additional Rent, as 
hereinafter defined), such pro rata portion to be based on the actual number 
of calendar days remaining in such partial month after the Commencement Date 
of the Lease Term.  If the Lease Term shall expire on other than the last day 
of a calendar month, such monthly installment of Fixed Rent and Additional 
Rent shall be prorated for each calendar day of such partial month.  Upon the 
second occurrence and those thereafter within any six-month period during the 
Lease Term, if any portion of Fixed Rent, Additional Rent or any other sum 
payable to Landlord hereunder shall be due and unpaid for more than ten (10) 
days, Tenant shall pay to Landlord, without notice or demand, a late charge 
equal to 5% of such overdue amount to partially compensate Landlord for its 
administrative costs.  Tenant acknowledges that such late fee is a reasonable 
approximation of such costs and does not constitute a penalty.  In addition, 
all amounts overdue and unpaid in excess of ten (10) days after notice by 
Landlord that such amounts are overdue  and unpaid shall bear interest at a 
rate equal to two percent (2%) per annum greater than the prime rate of 
interest as published in the Wall Street Journal, eastern edition, from time 
to time (the "Default Rate"), as the same may change from time to time, from 
the due date until the date of payment thereof by Tenant, provided, however, 
that nothing contained herein or elsewhere in this Lease shall be construed 
or implemented in such a manner as to allow Landlord to charge or receive 
interest in excess of the maximum legal rate then allowed by law.  Landlord 
and Tenant understand and agree that memos written on rental checks or any 
other payment forms delivered to Landlord do not and shall not, throughout 
the Lease Term hereunder, constitute satisfaction of any current or 
outstanding debt of Tenant pursuant to this Lease, and, provided further that 
any such memo shall not preclude Landlord from recovering any balance of any 
sum or sums due under this Lease.  In addition, a letter or similar type 
statement accompanying any rental check or payment form delivered to Landlord 
pursuant to this Lease also shall have no force or effect under this Lease as 
such may relate to the satisfaction of any debt of Tenant hereunder.

4.   ADDITIONAL RENT.  Tenant shall pay, without any setoff or deduction 
whatsoever, the Tax Adjustment and the Operating Expense Adjustment, as such 
terms are defined in Exhibit "C" hereto, in the amounts and in the manner set 
forth in Exhibit "C."  The Tax Adjustment, the Operating Expense Adjustment 
and all other sums due hereunder (other than Fixed Rent) are sometimes 
hereinafter referred to together as the Additional Rent.


                                       2




5.   USE OF DEMISED PREMISES.

     5.1. Subject to all other restrictions set forth in this Lease, the 
Tenant may use the Demised Premises only for the installation, operation and 
maintenance (including repair and replacement) of equipment and facilities in 
connection with Tenant's telecommunications business, executive and general 
office uses and any other legally permitted uses related thereto, and for no 
other purpose.  For purposes of this Lease, the term "general office use" 
shall not include use as a school, college, university or educational 
institution of any type other than the training of Tenant's customers, agents 
and employees, use as a governmental agency, use for any purpose which is not 
consistent with the operation of the Buildings as first-class office 
buildings, use as an employment, recruitment or temporary help service or 
agency, or any use involving regular traffic by the general public.

     5.2. Tenant shall not use or permit any use of the Demised Premises 
which creates any safety or environmental hazard, or which would:  (i) be 
dangerous to the Demised Premises, the Buildings, or other tenants in the 
Buildings, (ii) be disturbing to other tenants of the Buildings, or (iii) 
cause any increase in the premium cost for any insurance which Landlord may 
then have in effect with respect to the Buildings generally, unless Tenant 
refuses to pay such additional costs.

     5.3. This Lease includes the right of Tenant to use the Common Building 
Facilities in common with other tenants of the Buildings.  The words "Common 
Building Facilities" shall mean all of the facilities in or around the 
Buildings designed and intended for use by the tenants of the Buildings in 
common with Landlord and each other, including corridors; elevators; fire 
stairs; telephone and electric closets; telephone trunk lines and electric 
risers; aisles; walkways; truck docks; plazas; the roof and Building Parking 
Area to the extent not reserved for exclusive use by Landlord or others; 
courts; restrooms; service areas; lobbies; landscaped areas, and all other 
common and service areas of the Buildings intended for such use on the date 
hereof; excluding, however, (1) that part of the roof of the Buildings 
licensed for the exclusive use of Tenant in accordance with Section 33.7 
and/or 33.8 and (2) the restrooms, lobbies, corridors and telephone and 
electric closets on floors leased entirely by Tenant which shall be for the 
exclusive use of Tenant and shall not be used in common with other tenants or 
occupants of the Buildings.

     5.4. (a)  During the Term, Tenant shall comply with all statutes, rules, 
ordinances, orders, codes and regulations, other governmental requirements 
and legal requirements and standards issued thereunder (collectively referred 
to in this Lease as the "Laws") which are applicable to Tenant's use and 
occupancy of the Demised Premises.  Nothing herein shall be deemed to impose 
any obligation upon Tenant for any elements of the Structure or Building 
Service Systems for which Tenant is not otherwise responsible pursuant to the 
provisions of this Lease or for any restorations, alterations, replacements 
or repairs to the Buildings required to be made by Landlord pursuant to the 
provisions of this Lease.                                           


                                      3 




          (b)  (i)  Except as otherwise set forth herein, Landlord shall 
comply with all Laws which (1) affect the Buildings and Land or (2) relate to 
the performance by Landlord of any duties or obligations to be performed by 
Landlord under this Lease.  Landlord represents that, except as otherwise set 
forth in Exhibit "H" and with regard to matters covered by the Americans with 
Disabilities Act, the Buildings and Land are in compliance with all 
applicable Laws as of the date of this Lease.  Except as otherwise set forth 
in Exhibit "H",  Landlord shall be responsible for ensuring that the 
Buildings and Land shall at all times from the date hereof to the date of 
expiration of this Lease comply with all design, construction, energy 
conservation, environmental, fire, health, and safety Laws, provided, 
however, that Tenant shall be responsible for ensuring, at its sole cost, 
that the Tenant Work (as defined in Exhibit "L") and any other alterations, 
additions or improvements to the Buildings or on the Land constructed by 
Tenant (collectively with the Tenant Work, "Tenant Improvements") comply, at 
all times from the date hereof to the date of expiration of this Lease, with 
all design, construction, energy conservation, environmental, fire, health, 
and safety Laws and the requirements of Landlord's insurance underwriters.

               (ii) All boilers and other pressure vessel equipment shall be 
constructed and maintained by Landlord in accordance with ASME Standards and 
Codes.

              (iii) Landlord shall regularly inspect and maintain the HVAC 
system and treat the cooling tower with U.S. Environmental Protection Agency 
registered chemicals to prevent the buildup of slime, algae, and bacteria, 
and shall follow the current practices of the American Society of Heating, 
Refrigeration and Air Conditioning Engineers.

6.   COMPLETION OF DEMISED PREMISES.  Tenant agrees to accept possession of 
the Demised Premises in an "AS IS" condition, subject to the right of any 
existing tenant to remove its personal property or improvements, except for 
the work to be performed by Landlord pursuant to Exhibit "D."  Landlord will 
promptly correct any latent defects in the Buildings, other than those 
relating to Tenant Improvements, provided that such defects are reported to 
Landlord within six months after the Commencement Date.

7.   ALTERATIONS OR IMPROVEMENTS BY TENANT.  

     7.1. (a)  Except as otherwise provided in Exhibit "L", Tenant shall not 
during the Lease Term make any alterations, additions or improvements to the 
Demised Premises (including, without limitation, the Demised Premises Service 
Systems) in excess of $25,000 without the prior written approval of Landlord, 
and then only in accordance with plans and specifications previously approved 
in writing by Landlord, which approval shall not be unreasonably withheld or 
delayed, provided, however, that such approval may be subject to reasonable 
conditions including, without limitation, that Tenant be required to pay for 
any out-of-pocket cost to Landlord occasioned thereby.  Notwithstanding the 
foregoing, Landlord 


                                      4




agrees that Tenant shall be permitted, if necessary, to reinforce a portion 
of the floor(s) within the Demised Premises to support battery stacks and 
other equipment.  

          (b)  The words "Demised Premises Service Systems" shall mean the 
electrical, HVAC, mechanical, plumbing, safety and health and 
telecommunication (voice/data/signal) systems that directly service only the 
Demised Premises from a localized point of distribution.  Such systems are 
dedicated to the Demised Premises at their available capacities and do not 
service any space other than the Demised Premises.

          (c)  In the event of a dispute arising concerning the provisions of 
this Section 7.1, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

     7.2. (a)  Except as otherwise provided in Exhibit "L", Tenant shall not 
alter, improve, replace or change the Building Service Systems or the 
Structure except in accordance with this Section 7.2.  Tenant may make 
alterations, improvements, replacements and other changes to the Building 
Service Systems and to the Structure, provided that Landlord consents 
thereto, which consent may be withheld at Landlord's reasonable discretion.

          (b)  If Tenant desires to make alterations, improvements, 
replacements or other changes to the Structure or Building Service Systems, 
Tenant shall make a request for Landlord's approval by submitting to Landlord 
a list of proposed contractors and detailed plans and specifications for the 
work to be performed. Landlord shall respond within ten (10) business days 
from receipt of the same, approving those contractors and those portions of 
the work that are acceptable and disapproving those contractors and portions 
of the work that are, in Landlord's reasonable judgment, unacceptable, and 
specifying in detail the nature of Landlord's objection.

          (c)  The words "Building Service Systems" shall mean the 
electrical, HVAC, mechanical, plumbing, safety and health and 
telecommunication (voice/data/signal) systems that service the Buildings up 
to the point of localized distribution.  Such systems provide the main source 
of supply and distribution throughout the Buildings.

          (d)  The word "Structure" shall mean bearing walls, roof, exterior 
walls, support beams, foundation, window frames, floor slabs and support 
columns of the Buildings.

          (e)  In the event of a dispute arising concerning the provisions of 
this Section 7.2, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

     7.3. Regardless of whether or not Tenant is required under this Lease to 
obtain Landlord's consent to the construction of a particular Tenant 
Improvement, Tenant shall, in all 


                                      5




cases, prior to construction of the Tenant Improvement, provide Landlord, 
with (i) notice of its intent to construct such Tenant Improvement, and (ii) 
copies of all permits required to construct the Tenant Improvement.  All 
Tenant Improvements shall be constructed in accordance with the requirements 
of all applicable laws, ordinances, regulations, codes and other requirements 
of governmental authorities and with the regulations of Landlord's insurance 
underwriter.  In addition, all Tenant Improvements shall be constructed in a 
thorough, first-class and workmanlike manner and shall be in good and usable 
condition at the date of completion.  At any time and from time to time 
during the construction of the Tenant Improvements, Landlord, Landlord's 
architect and Landlord's general contractor may enter upon the Demised 
Premises and inspect the Tenant Improvements for the protection of the 
Buildings and/or any premises adjacent to the Demised Premises.  Such 
inspection shall, however, be for Landlord's benefit only and may not be 
relied upon by Tenant or any other party. When constructing any Tenant 
Improvements, Tenant shall comply with the requirements of Sections 7, 8, 9, 
10, 11 and 12 of Exhibit "L" attached hereto.

          (a)  In the event of a dispute arising concerning the provisions of 
this Section 7.3, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.  

     7.4. Tenant Improvements shall be deemed part of the Buildings and shall 
not be removed by Tenant.  Notwithstanding the foregoing, by notice to Tenant 
given at the time of approval, Landlord may require that Tenant either: (i) 
remove any such alterations, additions or improvements, repair any damage to 
the Buildings or the Demised Premises occasioned by their installation or 
removal, and restore the Demised Premises to substantially the same condition 
as existed prior to the time when any such alterations, additions or 
improvements were made, or (ii) reimburse Landlord for the cost of such 
removal, repair and restoration.  With regard to any alterations, additions 
or improvements which Tenant is entitled to construct without Landlord 
consent, Tenant may, prior to constructing such alterations, additions or 
improvements, request that Landlord inform Tenant whether it will require 
that such alterations, additions or improvements be removed and Landlord 
shall, with reasonable promptness, so inform Tenant.

          (a)  In the event of a dispute arising concerning the provisions of 
this Section 7.4, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

     7.5. As used in this Lease, the term "Tenant Improvements" shall not 
include Tenant's moveable personal property, trade fixtures and equipment 
(collectively, "Tenant's Owned Property").  Tenant's Owned Property shall be 
owned by and remain the property of Tenant and, subject to the provisions of 
Section 15, Tenant may remove all or any of Tenant's Owned Property at any 
time during the Term.  If Tenant removes such things or any of them, Tenant 
shall not be required to remove pipes, wires and the like from the walls, 
ceilings or 


                                      6




floors, provided Tenant properly cuts, disconnects and caps such pipes and 
wires and seals them off as required by Laws and Landlord's insurance 
underwriters.

          (a)  In the event of a dispute arising concerning the provisions of 
this Section 7.5, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

8.   COVENANTS OF LANDLORD.

     8.1. Tenant shall be granted access to the Demised Premises, including 
facilities for loading, unloading, delivery and pickup in the ordinary course 
of business, twenty-four (24) hours per day, seven (7) days a week.  Landlord 
shall provide passenger elevator service twenty-four (24) hours a day, seven 
(7) days a week, and freight elevator service as reasonably required by 
Tenant, subject to reasonable outages for repairs or maintenance.

     8.2. Landlord will supply, for normal office use, heat or air 
conditioning Monday through Friday from 7:00 a.m. to 6:00 p.m., and Saturday 
from 8:00 a.m. to 1:00 p.m. local time excluding Holidays (as defined in 
Exhibit "J"), elevator service (where applicable), janitorial and cleaning 
services as set forth in Exhibit "E" hereto, electricity, and hot and cold 
potable water, all in amounts consistent with services provided in similar 
first-class buildings in the community, provided that:  (i) Landlord shall 
not be liable for failure to supply or interruption of any such service by 
reason of any cause beyond Landlord's reasonable control and Landlord shall 
not be liable for consequential damages in any event; (ii) Landlord shall 
install meters to measure the electricity consumed on the Demised Premises 
and Tenant shall pay directly for the cost of Tenant's electrical consumption 
in the Demised Premises (which shall, for purposes of this Section, exclude 
base building heating and cooling, and common area electricity, the cost of 
which is included in Operating Expenses); (iii) if Tenant requires janitorial 
and cleaning services beyond those provided by Landlord, Tenant shall arrange 
for such additional services through Landlord, and Tenant shall pay Landlord 
for such additional services upon receipt of billing therefor; and (iv) if 
Tenant requires installation of a separate or supplementary heating, cooling, 
ventilating and/or air conditioning system Tenant shall pay all costs in 
connection with the furnishing, installation and operation thereof.

     8.3. In the event that Tenant requires heat or air conditioning beyond 
the hours set forth in Section 8.2 above, Tenant shall so notify Landlord (i) 
before noon on the business day when such service is required for the evening 
or (ii) by noon of the preceding business day when such service is required 
on a Saturday, Sunday or Holiday, and Tenant shall pay Landlord for 
Landlord's actual costs incurred thereby, within thirty (30) days of being 
billed therefor.  Any such bill shall include a tabulation of the days and 
hours upon which such services were provided.


                                      7 



     8.4. Landlord shall make all necessary repairs to the exterior windows, 
walls and other structural parts of the Demised Premises and the Buildings, 
the base building plumbing, heating, ventilating, air conditioning and 
electrical systems, the roofs of the Buildings, the common areas of the 
Buildings, and the parking areas, sidewalks and other common areas of the 
Land, and shall keep all such common areas reasonably free of debris, ice and 
snow.  Notwithstanding the foregoing, Landlord shall not be obligated to make 
any such repair until the expiration of a reasonable period of time after 
Landlord becomes aware that such repair is needed.  Furthermore, in no event 
shall Landlord be obligated to repair any damage caused by any act, omission 
or negligence of Tenant or any of its employees, agents, invitees, licensees, 
subtenants or contractors, or any defect or damage attributable to failure by 
Tenant or any of its employees, agents, invitees, licensees, subtenants or 
contractors to construct any Tenant Improvements in compliance with the terms 
of this Lease.  Tenant shall reimburse Landlord for all costs and expenses of 
repairing and replacing all damage or injury to the Buildings caused by 
Tenant or any of its employees, agents, invitees, licensees, subtenants or 
contractors, or by all or any of them moving in or out of the Buildings, or 
by installation or removal of furniture, fixtures or other property by all or 
any of them, or by the failure of all or any of them to construct any Tenant 
Improvements in compliance with the terms of this Lease. Such costs and 
expenses shall be payable as Additional Rent hereunder and shall be paid by 
Tenant within thirty (30) days after Tenant is billed therefor.

     8.5. Tenant, upon paying the Annual Fixed Rent and all Additional Rent 
when due, and upon observing, keeping and performing when required all of the 
covenants, agreements and conditions of this Lease on Tenant's part to be 
observed, kept and performed, shall quietly have and enjoy the Demised 
Premises throughout the Lease Term without hindrance or molestation by 
Landlord or by anyone claiming in, through or under Landlord, subject, 
however, to the terms of this Lease.

     8.6. (a)  If, after notice by Tenant, Landlord fails or refuses to make 
any repairs, restoration, or replacements which it is required to make under 
Section 8 or elsewhere in this Lease (other than repairs following a 
casualty, which are covered in Section 12) within thirty (30) days, or if 
such repairs, restorations or replacements cannot reasonably be made within 
thirty (30) days, if Landlord shall not commence such repairs within thirty 
(30) days and thereafter diligently pursue the same to completion, Tenant may 
declare an event of default and cure such default.  Landlord shall reimburse 
Tenant for the cost of such cure within thirty (30) days after Landlord 
receives Tenant's invoice.

          (b)  In the event of a dispute arising concerning the provisions of 
this Section 8.6, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

     8.7. If, by reason of an emergency, repairs, restoration, or 
replacements become necessary and by the provisions hereof are the 
responsibility of Landlord, Tenant may make 


                                      8 



such repairs, restoration or replacements which, in the opinion of Tenant, 
are necessary for the preservation of the Demised Premises, or of the safety 
or health of the occupants in the Project, or of Tenant's Owned Property, or 
are required by the Laws; provided, however, that Tenant shall first make a 
reasonable effort to inform Landlord before making them.

9.   COVENANTS OF TENANT.

     9.1. Tenant will, at Tenant's sole cost and expense, keep the Demised 
Premises and the fixtures and appurtenances therein in good order and repair 
at all times, reasonable wear and tear excepted.  Such obligation shall 
include, without limitation, all plumbing, heating, ventilating, air 
conditioning and electrical systems exclusively serving the Demised Premises 
from the point that such systems connect to the base building systems on each 
floor. Notwithstanding the foregoing, Landlord may, upon thirty (30) days' 
written notice (except in case of emergency), but shall not be required to, 
perform all or any portion of Tenant's repair obligations as set forth above 
on Tenant's behalf.  In such event, following the performance of such repairs 
by Landlord, Landlord shall charge Tenant the amount of the expense therefor. 
 If Tenant fails to pay such amount within thirty (30) days following 
delivery of Landlord's invoice therefor, such amount shall thereafter bear 
interest at the Default Rate until the date of payment by Tenant.  In the 
event Landlord does not elect to perform all or any portion of Tenant's 
repair obligations as set forth above and Tenant fails to make such repairs 
within thirty (30) days of the date such work becomes necessary, Landlord 
may, but shall not be required to, perform such work and charge the amount of 
the expense therefor, with interest accruing and payable thereon, all in 
accordance with Section 19 below;

     9.2. Tenant will comply with any covenants, easements and restrictions 
governing the Land or Buildings (including, but not limited to (i) that 
certain Declaration of Cross-Easements, Covenants and Restrictions of South 
Brunswick Corporate Center made by Landlord, dated October 9, 1995 and to be 
recorded in the Clerk's Office of Middlesex County and (ii) that certain 
Declaration of Certain Easements and Covenants of South Brunswick Corporate 
Center made by Landlord, dated October 9, 1995 and to be recorded in the 
Clerk's Office of Middlesex County) and shall indemnify, defend and hold 
Landlord harmless from all consequences from Tenant's failure to do so;

     9.3. Tenant will promptly notify Landlord of any damage to or defects in 
the Demised Premises of which it becomes aware, any notices of violation 
received by Tenant and any injuries to person or property which occur therein 
or claims relating thereto;

     9.4. Tenant will not place within the Demised Premises or bring into the 
Buildings any machinery or other personalty having a weight in excess of the 
design capacity of the Buildings, such capacity on above-grade floors being 
60 pounds per square foot, without the prior written consent of Landlord and 
without full compliance with all applicable building security measures;       


                                      9 



     9.5. Tenant will comply with the rules and regulations set forth in 
Exhibit "F" hereto and with all reasonable changes and additions thereto upon 
notice by Landlord to Tenant (such rules and regulations, together with all 
changes and additions thereto, being part of this Lease);

     9.6. Tenant will comply with all reasonable recommendations of 
Landlord's or Tenant's insurance carriers relating to layout, use, storage of 
materials and maintenance of the Demised Premises; and

     9.7. Tenant further agrees to the following:

          (a)  As used in this Lease, the following terms shall have the
following meanings:

               (i)  "Environmental Laws" shall mean all federal, state or 
local laws, regulations, rules, ordinances or administrative or judicial 
rulings relating to (A) releases or threatened releases of Hazardous 
Materials or materials containing Hazardous Materials, including, without 
limitation, the Comprehensive Environmental Response, Compensation and 
Liability Act or the New Jersey Spill Compensation and Control Act; (B) the 
manufacture, handling, transport, use, treatment, storage or disposal of 
Hazardous Materials or materials containing Hazardous Materials (C) the 
transfer of industrial facilities, including, without limitation, ISRA; (D) 
storage tanks; or (E) otherwise relating to the environment or to the 
protection of human health.

               (ii) "Hazardous Materials" shall mean all chemical, 
biological, organic, inorganic, infectious, toxic or hazardous pollutants, 
contaminants, chemicals, substances, materials or wastes of whatever kind or 
nature, whether liquid, solid or gaseous, including, without limitation, 
pollutants, contaminants, chemicals, substances, materials and wastes 
regulated under, defined, listed or included in any Environmental Laws.  
Hazardous Materials shall include, without limitation, asbestos, 
polychlorinated biphenyls, and petroleum products.

              (iii) "Hazardous Materials Inventory" shall mean a 
comprehensive inventory of all Hazardous Materials used, generated, stored, 
treated or disposed of by Tenant at the Demised Premises.

               (iv) "ISRA" shall mean the New Jersey Industrial Site Recovery 
Act, N.J.S.A. 13:1K-6 et seq. and the regulations promulgated thereunder, as 
amended from time to time.                                           


                                      10 



               (v)  "Losses" shall mean all liabilities, obligations, losses, 
damages, penalties, actions, judgment, lawsuits, costs, expenses, 
disbursements, orders or decrees, including, without limitation, attorneys' 
and consultants' fees and expenses.

               (vi) "NJDEP" shall mean the New Jersey Department of 
Environmental Protection.

          (b)  Tenant shall not use the Demised Premises, the Buildings or 
the Land for the generation, use, manufacture, recycling, transportation, 
treatment, storage, handling, discharge or disposal of any Hazardous 
Materials; provided, however, that the foregoing shall not be deemed or 
construed to prohibit Tenant's possession or use of products containing 
Hazardous Materials so long as such products are commonly found in an office 
environment or non-manufacturing telecommunications business and are handled, 
stored, used and disposed of in compliance with all Environmental Laws.  
Furthermore, Tenant will not engage in any activity at the Demised Premises, 
the Buildings or the Land which poses a risk of damage to the environment or 
which would subject Tenant, Landlord, the Demised Premises, the Buildings or 
the Land to responsibility or liability under any Environmental Law.

          (c)  Tenant shall (i) comply with all Environmental Laws in 
connection with Tenant's use or occupancy of the Demised Premises, Buildings 
and Land; (ii) obtain, maintain in full force and effect, and comply with, 
all permits required under Environmental Laws; (iii) comply with all record 
keeping and reporting requirements imposed by Environmental Laws concerning 
the use, handling, treatment, storage, disposal or release of Hazardous 
Materials on the Demised Premises, Buildings and Land; (iv) report to 
Landlord any release or discharge of Hazardous Materials within two business 
days of such discharge or release; (v) provide to Landlord copies of all 
written reports concerning such discharge of Hazardous Materials that are 
required to be filed with Governmental Entities under Environmental Laws; 
(vi) maintain and annually update a Hazardous Materials Inventory with 
respect to Hazardous Materials used, generated, treated, stored or disposed 
of at the Demised Premises, Buildings and Land; and (vii) make available to 
Landlord for inspection and copying (at Landlord's expense), upon reasonable 
notice and at reasonable times, such Hazardous Materials Inventory and any 
other reports, inventories or other records required to be kept under 
Environmental Laws concerning the use, generation, treatment, storage, 
disposal or release of Hazardous Materials.

          (d)  In the event that Tenant's operations at the Demised Premises, 
Buildings or Land cause any part of the Demised Premises, Buildings or Land, 
to be deemed an industrial establishment (as such term is defined by ISRA) 
and such Tenant takes any action that triggers the applicability of ISRA, 
Tenant shall: (i) take all steps necessary to achieve compliance with ISRA 
with respect to such transaction or event; (ii) pay all costs and fees 
associated with achieving compliance with ISRA in connection with such 
matter; and (iii) provide Landlord with copies of:  (a) all correspondence 
with the NJDEP; (b) all field and


                                      11



laboratory data generated by or on behalf of Tenant; and (c) all reports, 
summaries proposals and recommendations submitted to the NJDEP in connection 
with such matter.

          (e)  Tenant does hereby agree to indemnify, defend and save 
harmless Landlord from any and all Losses resulting from any claim, demand, 
liability, obligation, right or cause of action, including but not limited to 
governmental action or other third party action, (collectively, "Claims"), 
that is asserted against or incurred by Landlord, the Demised Premises, the 
Buildings or the Land as a result of Tenant's breach of any representation, 
warranty, or covenant hereof; or arising out of the operations or activities 
or presence of Tenant or any assignee, sublessee, agent, or representative of 
Tenant at the Demised Premises, the Buildings or the Land; or arising from 
environmental conditions or violations at the Demised Premises including 
without limitation the presence of Hazardous Materials at, on, or under the 
Demised Premises or the discharge or release of Hazardous Materials from the 
Demised Premises, provided, however, that Tenant shall not be obligated to 
indemnify Landlord under this paragraph if (i) the Claim arises due to events 
or conditions which occurred prior to the date of this Lease or (ii) Tenant 
is not responsible for such Claim under Environmental Laws, except as 
consequence of any negligence or willful misconduct of Landlord.

          (f)  Landlord does hereby agree to indemnify and save harmless 
Tenant from all Losses resulting from any Claims that are asserted against 
Tenant or the Demised Premises as a result of the presence of Hazardous 
Materials at the Demised Premises (i) deposited at the Demised Premises prior 
to the date of this Lease or (ii) for which Tenant is not responsible under 
Environmental Laws.  To the best of Landlord's knowledge, the Buildings and 
Demised Premises are in compliance with Environmental Laws as of the date 
hereof.

          (g)  The indemnities contained herein and the environmental 
representations, warranties and covenants of Landlord and Tenant shall 
survive termination of this Lease.

          (h)  Exhibit "H" contains a summary of certain environmental 
conditions on the Property concerning which International Business Machines 
Corporation ("IBM") has certain remediation obligations pursuant to an 
agreement with Landlord and various agreements with NJDEP.                    


                                      12 



10.  ASSIGNMENT AND SUBLETTING.

     10.1.     Tenant shall not assign, pledge, mortgage or otherwise 
transfer or encumber this Lease, nor sublet all or any part of the Demised 
Premises or permit the same to be occupied or used by anyone other than 
Tenant or its employees, without Landlord's prior written consent, which 
consent shall not be unreasonably withheld or delayed.  It will not be 
unreasonable for Landlord to withhold its consent if the financial 
responsibility or business of a proposed assignee or subtenant is 
unsatisfactory to Landlord, or if Landlord deems such business not to be 
consonant with that of other tenants in the Buildings.

     10.2.     Tenant's request for consent to any sublet or assignment shall 
be in writing and shall contain the name, address, and description of the 
business of the proposed assignee or subtenant, its most recent financial 
statement and other evidence of financial responsibility, its intended use of 
the Demised Premises, and the terms and conditions of the proposed assignment 
or subletting. Within twenty (20) days from receipt of such request, Landlord 
shall either: (1) grant or refuse consent; or (2) if the request is for 
consent to a proposed assignment of this Lease, to terminate this Lease and 
the Lease Term effective as of the last day of the third month following the 
month in which the request was received.

     10.3.     Each assignee hereunder shall assume and be deemed to have 
assumed this Lease and shall be and remain liable jointly and severally with 
Tenant for all payments and for the due performance of all terms, covenants, 
conditions and provisions herein contained on Tenant's part to be observed 
and performed.  No assignment shall be binding upon Landlord unless the 
assignee shall deliver to Landlord an instrument in form and substance 
satisfactory to Landlord containing a covenant of assumption by the assignee, 
but the failure or refusal of assignee to execute and deliver the same shall 
not release assignee from its liability as set forth herein.  Any sublease or 
assignment document shall comply with the requirements of Section 5 of this 
Lease.  Fifty percent (50%) of any profit or additional consideration or rent 
in excess of the Fixed Rent or Additional Rent payable by Tenant hereunder 
which is payable to Tenant as a result of any assignment or subletting 
(excluding any assignment or subletting to Related Parties (as defined 
hereafter)) after subtraction of Tenant's subleasing expenses, shall be paid 
to Landlord as Additional Rent when received by Tenant; provided that, in no 
event shall any rental paid for use of Tenant's Owned Property be payable to 
Landlord.  Any such purported lease, sublease, license, concession or other 
agreement shall be absolutely void and ineffective as a conveyance of any 
right or interest in the possession, use or occupancy of any part of the 
Demised Premises.  Notwithstanding the foregoing, Tenant shall have the right 
to place the telecommunication equipment of other tenants and/or other of its 
customers on the Demised Premises and such placement shall not be deemed an 
assignment or sublease, provided, however, that except for a right of use, 
neither such placement nor any agreement between Tenant and any other tenant 
or customer with regard to such placement shall grant to any such tenant or 
customer any rights whatsoever in or to the Demised Premises.                 


                                      13 



     10.4.     Any consent by Landlord hereunder shall not constitute a 
waiver of strict future compliance by Tenant with the provisions of this 
Section or a release of Tenant from the full performance by Tenant of any of 
the terms, covenants, provisions, or conditions in this Lease contained.

     10.5.     Notwithstanding any of the foregoing, Tenant may assign or 
sublet this Agreement, or any portion thereof, without Landlord's consent, to 
any entity (i) which controls, is controlled by or is under common control 
with Tenant, (ii) resulting from the merger or consolidation with Tenant, or 
to any entity which acquires all of the assets of Tenant as a going concern 
or the assets of the business that is being conducted on the Demised 
Premises, (iii) in which Tenant, or any entity affiliated with Tenant has at 
least a ten percent (10%) ownership interest, or (iv) which has entered into 
a management contract with Tenant or any entity in which Tenant, or any 
entity having at least a ten percent (10%) ownership interest in Tenant, has 
at least a ten percent (10%) ownership interest (collectively, "Related 
Parties").  Any such assignment or sublease shall not, in any way, affect or 
limit the liability of Tenant under the terms of this Agreement.

11.  EMINENT DOMAIN.  

     11.1.     If the whole or more than fifty percent (50%) of the Demised 
Premises, Buildings or Land (or use or occupancy of the Demised Premises) 
shall be taken or condemned by any governmental or quasi-governmental 
authority for any public or quasi-public use or purpose (including sale under 
threat of such a taking), or if the owner elects to convey title to the 
condemnor by a deed in lieu of condemnation, then this Lease shall cease and 
terminate on the earlier of (i) the date when title vests in such 
governmental or quasi-governmental authority or (ii) the date upon which such 
governmental or quasi-governmental authority takes possession.  The Fixed 
Rent and Additional Rent shall be abated from and after such date.

     11.2.     If fifty percent (50%) or less of the Demised Premises, 
Buildings or Land shall be taken or condemned by any governmental or 
quasi-governmental authority for any public or quasi-public use or purpose 
(including sale under threat of such a taking), or if the owner elects to 
convey title to the condemnor by a deed in lieu of condemnation, and as a 
result thereof, in Tenant's reasonable judgment, the Demised Premises cannot 
be used for Tenant's permitted use as set forth herein, then this Lease shall 
cease and terminate on the earlier of (i) the date when title vests in such 
governmental or quasi-governmental authority or (ii) the date upon which such 
governmental or quasi-governmental authority takes possession.  The Fixed 
Rent and Additional Rent shall be abated from and after such date.  

     11.3.     If fifty percent (50%) or less of the Demised Premises, 
Buildings or Land shall be taken or condemned by any governmental or 
quasi-governmental authority for any public or quasi-public use or purpose 
(including sale under threat of such a taking), or if the owner               


                                      14 



elects to convey title to the condemnor by a deed in lieu of condemnation, 
and this Lease is not terminated as set forth in Section 11.2 above, the 
Fixed Rent and Tenant's Proportionate Share (as defined in Exhibit "C") shall 
be equitably adjusted from and after the earlier of (i) the date when title 
vests in such governmental or quasi-governmental authority or (ii) the date 
upon which such governmental or quasi-governmental authority takes 
possession.  The Lease shall otherwise continue in full force and effect.  

     11.4.     Tenant shall have no claim against Landlord for any portion of 
the amount that may be awarded as damages as a result of any governmental or 
quasi-governmental taking or condemnation (or sale under threat of such 
taking or condemnation) and all rights of Tenant or damages therefore are 
hereby assigned by Tenant to Landlord.  The foregoing shall not, however, 
deprive Tenant of any separate award for moving expenses, dislocation damages 
or for any other award which would not reduce the award payable to Landlord.

12.  CASUALTY DAMAGE.

     12.1.     In the event of damage to or destruction of the Demised 
Premises caused by fire or other casualty, or any such damage or destruction 
to the Buildings or the facilities necessary to provide services and normal 
access to the Demised Premises in accordance herewith, Landlord shall 
undertake to make repairs and restorations with reasonable diligence within 
two hundred forty (240) days of the casualty as hereinafter provided, unless 
this Lease has been terminated by Landlord or Tenant as hereinafter provided 
or unless any mortgagee which is entitled to receive casualty insurance 
proceeds fails to make available to Landlord a sufficient amount of such 
proceeds to cover the cost of such repairs and restoration.  If (i) the 
damage is of such nature or extent that, in Landlord's reasonable judgment, 
more than two hundred forty (240) days would be required (with normal work 
crews and hours) to repair and restore the part of the Demised Premises or 
Buildings which has been damaged, or (ii) the Demised Premises or the 
Buildings is so damaged that, in Landlord's reasonable judgment, it is 
uneconomical to restore or repair the Demised Premises or the Buildings, as 
the case may be, or (iii) less than two (2) years then remain on the current 
Lease Term, Landlord shall so advise Tenant promptly, and either party, in 
the case described in clause (i) above, or Landlord, in the cases described 
in clauses (ii) or (iii) above, within thirty (30) days after any such damage 
or destruction, shall have the right to terminate this Lease by written 
notice to the other, as of the date specified in such notice, which 
termination date shall be no later than ten (10) days after the date of such 
notice.  In the event that less than two (2) years remain on the current 
Lease Term and the damage is of such a nature or extent that, in Landlord's 
reasonable judgment, more than ninety (90) days would be required (with 
normal work crews) to repair and restore the part of the Demised Premises or 
Buildings which has been damaged, Tenant shall have the right to terminate 
this Lease by written notice to Landlord, as of the date specified in such 
notice, which termination date shall be no later than ten (10) days after the 
date of such notice.  

                                      15 



     12.2.     In the event of fire or other casualty damage, provided this 
Lease is not terminated pursuant to the terms of this Section and is 
otherwise in full force and effect, and sufficient casualty insurance 
proceeds are available for application to such restoration or repair, 
Landlord shall proceed diligently to restore the Demised Premises to 
substantially its condition prior to the occurrence of the damage.  Landlord 
shall not be obligated, however, to repair or restore any improvements, 
alterations or additions in excess of the Building Standard Tenant 
Improvements (whether or not Tenant has the right or the obligation to remove 
the same or is required to leave the same on the Demised Premises as of the 
expiration or earlier termination of this Lease) unless Tenant, in a manner 
reasonably satisfactory to Landlord, assures or agrees to assure payment in 
full of all costs as may be incurred by Landlord in connection therewith.  
(For purposes of this Lease, the Tenant Work shall be deemed representative 
of "Building Standard Tenant Improvements" for the Buildings.)  If there are 
any such improvements, alterations or additions and Tenant does not assure or 
agree to assure payment of the cost of restoration or repair as aforesaid, 
Landlord shall have the right to restore the Demised Premises to 
substantially the same condition as existed prior to the damage, excepting 
such improvements, alterations or additions.  Tenant shall be responsible for 
the repair or restoration of all of Tenant's Owned Property located in or on 
the Demised Premises, subject to Section 7 and such other conditions as 
Landlord may require.

     12.3.     Landlord shall not be required to insure any improvements, 
alterations or additions to the Demised Premises in excess of Building 
Standard Tenant Improvements, or to insure any of Tenant's Owned Property.  
Tenant shall, at its sole expense, insure the value of its leasehold 
improvements, alterations and additions in excess of Building Standard Tenant 
Improvements, for the purpose of providing funds to Landlord and Tenant to 
repair and restore the Demised Premises to substantially its condition prior 
to occurrence of the casualty.

     12.4.     The validity and effect of this Lease shall not be impaired in 
any way by the failure of Landlord to complete repairs and restoration of the 
Demised Premises or of the Buildings within two hundred forty (240) days 
after commencement of the work, even if Landlord had in good faith notified 
Tenant that the repair and restoration could be completed within such period, 
provided that Landlord proceeds diligently with such repair and restoration 
and completes such repair and restoration within two hundred seventy (270) 
days after commencement of the work.  In the event the work is not completed 
within such two hundred seventy (270) day period, Tenant shall have the 
right, by notice given within fifteen (15) days after the expiration of such 
two hundred seventy (270) day period, to terminate the Lease.  In the case of 
damage to the Demised Premises which is of a nature or extent that Tenant's 
continued occupancy is in the judgment of Landlord substantially impaired, 
then the Annual Fixed Rent payable by Tenant hereunder and Tenant's 
Proportionate Share shall be equitably abated or adjusted for the duration of 
such impairment.                                            


                                      16



     13.  INSURANCE; INDEMNIFICATION OF LANDLORD; WAIVER OF SUBROGATION.

     13.1.     Tenant covenants and agrees to exonerate, indemnify, defend, 
protect and save Landlord, its representatives and Landlord's managing agent, 
if any, harmless from and against any and all claims, demands, expenses, 
losses, suits and damages as may be occasioned by reason of (i) any accident 
or matter occurring on or about the Demised Premises, causing injury to 
persons or damage to property (including, without limitation, the Demised 
Premises), unless such accident or other matter resulted from the negligence 
or otherwise tortious act of Landlord or Landlord's agents or employees, (ii) 
the failure of Tenant fully and faithfully to perform the obligations and 
observe the conditions of this Lease, and (iii) the negligence or otherwise 
tortious act of Tenant or anyone in or about the Project on behalf of or at 
the invitation or right of Tenant. Tenant shall maintain in full force and 
effect, at its own expense, comprehensive general liability insurance 
(including a contractual liability and fire legal liability insurance 
endorsement) naming as an additional insured Landlord and Landlord's managing 
agent, if any, against claims for bodily injury, death or property damage in 
amounts not less than $2,000,000.00 (or such higher limits as may be 
determined by Landlord from time to time) and business interruption insurance 
in an amount sufficient to reimburse Tenant for loss of earnings attributable 
to prevention of access to the Buildings or the Demised Premises for a period 
of at least twelve (12) months.  All policies shall be issued by companies 
having a Best's financial rating of A or better and a size class rating of 
XII (12) or larger or otherwise acceptable to Landlord.  At or prior to the 
Commencement Date, Tenant shall deposit certificates of such insurance with 
Landlord and shall deposit with Landlord renewals thereof at least fifteen 
(15) days prior to the expiration thereof.  Such policy or policies of 
insurance or certificates thereof shall have attached thereto an endorsement 
that such policy shall not be canceled without at least thirty (30) days 
prior written notice to Landlord and Landlord's managing agent, if any, that 
no act or omission of Tenant shall invalidate the interest of Landlord under 
such insurance and expressly waiving all rights of subrogation as set forth 
below. At Landlord's request, Tenant shall provide Landlord with a letter 
from an authorized representative of its insurance carrier stating that 
Tenant's current and effective insurance coverage complies with the 
requirements contained herein.  Any insurance required of Tenant hereunder 
may be furnished by Tenant under a blanket policy carried by it, provided 
that such blanket policy shall contain an endorsement that names Landlord as 
an additional insured, specifically references the Demised Premises, and 
guarantees a minimum limit available for the Demised Premises

                                          17

 
equal to or greater than the insurance amounts required under this Section. 
Each policy evidencing the insurance to be carried by Tenant hereunder shall 
contain a clause that such policy and the coverage evidenced thereby shall be 
primary with respect to any policies carried by Landlord, and that any 
coverage carried by Landlord shall be excess insurance.

     13.2.     Landlord and Tenant hereby release the other from any and all 
liability or responsibility to the other or anyone claiming through or under 
them by way of subrogation or otherwise for any loss or damage to property 
covered by insurance then in force, even if any such fire or other casualty 
occurrence shall have been caused by the fault or negligence of the other 
party, or anyone for whom such party may be responsible.  This release shall 
be applicable and in full force and effect, however, only to the extent of 
and with respect to any loss or damage occurring during such time as the 
policy or policies of insurance covering such loss shall contain a clause or 
endorsement to the effect that this release shall not adversely affect or 
impair such insurance or prejudice the right of the insured to recover 
thereunder.  To the extent available, Landlord and Tenant further agree to 
provide such endorsements for such insurance policies agreeing to the waiver 
of subrogation as required herein.

14.  INSPECTION; ACCESS; CHANGES IN BUILDING FACILITIES.

     14.1.     Upon reasonable notice and at reasonable times, accompanied by 
Tenant's employee or agent, Landlord and its agents or other representatives 
shall be permitted to enter the Demised Premises (i) to examine, inspect and 
protect the Demised Premises and the Buildings, (ii) during the last nine (9) 
months of the Lease Term, or prior thereto if Tenant vacates the Demised 
Premises, to show the Demised Premises to prospective tenants and to affix to 
any suitable part of the Buildings a notice for letting the Demised Premises, 
or (iii) to show the Demised Premises to prospective purchasers, lenders and 
other interested parties and to affix to any suitable part of the Buildings a 
notice for sale of the Buildings.  Notwithstanding the foregoing, notice of 
entry shall not be required in the event of an emergency.

     14.2.     Upon reasonable notice and at reasonable times, accompanied by 
Tenant's employee or agent, Landlord shall have access to and use of all 
areas in the Demised Premises (including exterior Buildings walls, core 
corridor walls and doors and any core corridor entrances), any roofs adjacent 
to the Demised Premises, and any space in or adjacent to the Demised Premises 
used for shafts, stacks, pipes, conduits, fan rooms, ducts, electric or other 
utilities, sinks or other Buildings facilities, as well as access to and 
through the Demised Premises for the purpose of operation, maintenance, 
decoration and repair, provided, however, that except in emergencies such 
access shall not be exercised so as to interfere unreasonably with Tenant's 
use of the Demised Premises. Tenant shall permit Landlord to install, use and 
maintain pipes, ducts and conduits in and through the Demised Premises, 
provided that the installation work is performed at such times and by such 
methods as will not materially interfere with Tenant's use of the Demised 
Premises, materially reduce the floor 

                                          18



area thereof or materially and adversely affect Tenant's layout.  Landlord 
and Tenant shall cooperate with each other in the location of Landlord's and 
Tenant's facilities requiring such access.

     14.3.     Landlord reserves the right at any time upon ten (10) days' 
prior notice, without incurring any liability to Tenant therefor, to make 
such changes in or to the interior and exterior of the Buildings and the 
fixtures and equipment thereof, as well as in or to the entrances, halls, 
foyers, passages, doors, doorways, corridors, elevators, if any, stairways, 
bathrooms and other public parts thereof, and to the Land and any other 
improvements thereon, as Landlord may deem necessary or desirable; provided 
that there shall be no change that materially detracts from the character or 
quality of the Buildings or, in Tenant's reasonable judgment, materially and 
adversely affects Tenant's use and enjoyment of the Demised Premises and 
other rights granted pursuant to this Lease.

     14.4.     In the event of a dispute arising concerning the provisions of 
this Section 14, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

15.  DEFAULT.  Any other provisions in this Lease notwithstanding, it shall 
be an event of default ("Event of Default") under this Lease if: (i) Tenant 
fails to pay any installment of Fixed Rent, Additional Rent or other sum 
payable by Tenant hereunder when due and such failure continues for a period 
of ten (10) days after written notice from Landlord of such failure, or (ii) 
Tenant fails to observe or perform any other covenant or agreement of Tenant 
herein contained and such failure continues after written notice given by or 
on behalf of Landlord to Tenant for more than 30 days, or (iii) Tenant uses 
or occupies the Demised Premises other than as permitted hereunder, or (iv) 
Tenant assigns or sublets, or purports to assign or sublet, the Demised 
Premises or any part thereof other than in the manner and upon the conditions 
set forth herein, or (v) Tenant abandons or vacates the Demised Premises 
without paying rent, (vi) Tenant files a petition commencing a voluntary 
case, or has filed against it a petition commencing an involuntary case, 
under the Federal Bankruptcy Code (Title 11 of the United States Code), as 
now or hereafter in effect, or under any similar law, or files or has filed 
against it a petition or answer in bankruptcy or for reorganization or for an 
arrangement pursuant to any state bankruptcy law or any similar state law, 
and, in the case of any such involuntary action, such action shall not be 
dismissed, discharged or denied within sixty (60) days after the filing 
thereof, or Tenant consents or acquiesces in the filing thereof, or (viii) if 
Tenant is a banking organization, Tenant files an application for protection, 
voluntary liquidation or dissolution applicable to banking organizations, or 
(ix) a custodian, receiver, trustee or liquidator of Tenant or of all or 
substantially all of Tenant's property or of the Demised Premises shall be 
appointed in any proceedings brought by or against Tenant and, in the latter 
case, such entity shall not be discharged within sixty (60) days after such 
appointment or Tenant consents to or acquiesces in such appointment, or (x) 
Tenant shall generally not pay Tenant's debts as such debts become due, or 
shall make an assignment for 

                                          19



the benefit of creditors, or shall admit in writing its inability to pay its 
debts generally as they become due, or (xi) any of the foregoing occurs as to 
any guarantor or surety of Tenant's performance under this Lease, or such 
guarantor or surety defaults on any provision under its guaranty or 
suretyship agreement.  The notice and grace period provisions in clauses (i) 
and (ii) above shall have no application to the Events of Default referred to 
in clauses (iii) through (x) above or, to the extent applicable, (xi).

16.  LANDLORD'S REMEDIES.

     16.1.     Upon the occurrence of any Event of Default, Landlord at any 
time thereafter may at its option exercise any one or more of the following 
remedies: 

          (a)  Landlord may terminate this Lease, by written notice to 
Tenant, without any right by Tenant to reinstate its rights by payment of 
rent due or other performance of the terms and conditions hereof.  Upon such 
termination Tenant shall immediately surrender possession of the Demised 
Premises to Landlord, and Landlord shall immediately become entitled to 
receive from Tenant an amount equal to the aggregate of all Fixed Rent and 
Additional Rent (which Additional Rent shall be fixed at the level of the 
last complete Operating Year prior to such termination) reserved under this 
Lease for the balance of the Lease Term, determined as of the date of such 
termination.

          (b)  Landlord may, at Landlord's option, with or without 
terminating this Lease, enter upon the Demised Premises and remove any and 
all persons therefrom and take and retain possession thereof by any means 
available to Landlord, including summary dispossess proceedings.  

          (c)  If Landlord elects to terminate Tenant's right to possession 
only, without terminating the Lease, Landlord may, at the Landlord's option, 
enter into the Demised Premises, remove Tenant's signs and other evidences of 
tenancy, and take and hold possession thereof as hereinabove provided, 
without such entry and possession terminating the Lease or releasing Tenant, 
in whole or in part, from Tenant's obligations to pay the rent hereunder for 
the full term or for any other of its obligations under this Lease.  Landlord 
may, but will not be under obligation to, relet all or any part of the 
Demised Premises in any manner, for any term, for such rent and upon terms 
satisfactory to Landlord and may decorate or make any repairs, changes, 
alterations or additions in or to the Demised Premises that may be necessary 
or convenient.  If Landlord does not relet the Demised Premises, Tenant will 
pay the Landlord on demand all amounts due from Tenant to Landlord under this 
Lease for the remainder of the Lease Term.  If the Demised Premises are 
relet, Tenant shall pay any excess of the rent over the actual proceeds of 
such reletting, net of all expenses, including repairs or construction costs 
and leasing commissions.  If the Demised Premises are at the time of any 
Event of Default sublet or leased by Tenant to others, Landlord may collect 
rents due from any

                                          20



subtenant or other tenant and apply such rents to the rent and other amounts 
due hereunder without in any way affecting Tenant's obligation to Landlord 
hereunder.

          (d)  Landlord may declare Fixed Rent and all items of Additional 
Rent (the amount thereof to be based on historical amounts and Landlord's 
estimates for future amounts) for the entire balance of the then current 
Lease Term immediately due and payable, together with all other charges, 
payments, costs, and expenses payable by Tenant as though such amounts were 
payable in advance on the date the Event of Default occurred.  

          (e)  Landlord may remove all persons and property from the Demised 
Premises, and store such property in a public warehouse or elsewhere at the 
cost of and for the account of Tenant, upon service of notice or resort to 
legal process and without being deemed guilty of trespass or becoming liable 
for any loss or damage which may be occasioned thereby. 

     16.2.     No expiration or termination of this Lease Term by operation 
of law or otherwise (except as expressly provided herein), and no 
repossession of the Demised Premises or any part thereof shall relieve Tenant 
of its liabilities and obligations hereunder, all of which shall survive such 
expiration, termination or repossession, and Landlord may, at its option, sue 
for and collect all rent and other charges due hereunder at any time as and 
when such charges accrue.  

     16.3.     In the event of breach or threatened breach by Tenant of any 
provision of this Lease, Landlord shall have the right of injunction and the 
right to invoke any remedy allowed at law or in equity in addition to other 
remedies provided for herein.

     16.4.     Tenant hereby expressly waives any and all rights of 
redemption granted by or under any present or future law in the event this 
Lease is terminated, or in the event of Landlord obtaining possession of the 
Demised Premises, or in the event Tenant is evicted or dispossessed for any 
cause, by reason of violation by Tenant of any of the provisions of this 
Lease.  

     16.5.     No right or remedy herein conferred upon or reserved to 
Landlord is intended to be exclusive of any other right or remedy herein or 
by law provided, but each shall be cumulative and in addition to every other 
right or remedy given herein or now or hereafter existing at law or in equity 
or by statute.

     16.6.     In the event that Landlord commences suit for the repossession 
of the Demised Premises, for the recovery of rent or any other amount due 
under the provisions of this Lease, or because of the breach of any other 
covenant herein contained on the part of Tenant to be kept or performed, 
Tenant shall, if Landlord shall prevail in such suit, pay to Landlord all 
reasonable expenses incurred in connection therewith, including reasonable 
attorneys' fees.

                                          21



17.  LANDLORD'S RIGHT TO CURE TENANT'S DEFAULT.  If Tenant defaults in the 
making of any payment or in the doing of any act herein required to be made 
or done by Tenant (including expiration of any applicable cure periods), then 
Landlord may, but shall not be required to, make such payment or do such act, 
and charge the amount of Landlord's expense, with interest accruing and 
payable thereon at the Default Rate as of the date of the expenditure by 
Landlord or as of the date of payment thereof by Tenant, whichever is higher, 
from the date paid or incurred by Landlord to the date of payment thereof by 
Tenant.  Such payment and interest shall constitute Additional Rent hereunder 
due and payable with the next monthly installment of Fixed Rent, but the 
making of such payment or the taking of such action by Landlord shall not 
operate to cure such default by Tenant or to estop Landlord from the pursuit 
of any remedy to which Landlord would otherwise be entitled.

18.  TENANT'S REMEDIES.  In the event of breach or threatened breach by 
Landlord of any provision of this Lease, Tenant shall have the right of 
injunction and the right to invoke any remedy allowed at law or in equity in 
addition to other remedies provided for herein.

19.  ESTOPPEL CERTIFICATE.  Tenant shall, at any time and from time to time, 
at the request of Landlord, upon ten (10) business days notice, execute and 
deliver to Landlord a certificate in the form of Exhibit "G" attached hereto 
or some other reasonable form supplied by Landlord, it being intended that 
any such certificate delivered pursuant hereto may be relied upon by others 
with whom Landlord may be dealing.

20.  HOLDING OVER.  If Tenant retains possession of the Demised Premises or 
any part thereof after the termination of this Lease by expiration of the 
Lease Term or otherwise, in the absence of any written agreement between 
Landlord and Tenant concerning any such continuance of the Lease Term, Tenant 
shall pay Landlord (i) an amount, calculated on a per diem basis for each day 
of such unlawful retention, equal to the greater of (a) 150% the Annual Fixed 
Rent in effect immediately prior to the expiration or earlier termination of 
the Lease Term, or (b) the market rental for the Demised Premises, as 
determined by Landlord, for the time Tenant thus remains in possession, plus, 
in each case, all Additional Rent and other sums payable hereunder.  Without 
limiting any rights and remedies of Landlord resulting by reason of the 
wrongful holding over by Tenant, or creating any right in Tenant to continue 
in possession of the Demised Premises, all Tenant's obligations with respect 
to the use, occupancy and maintenance of the Demised Premises shall continue 
during such period of unlawful retention.

21.  SURRENDER OF DEMISED PREMISES.  Tenant shall, at the expiration or 
earlier termination of this Lease, promptly surrender the Demised Premises in 
good order and condition and in conformity with the applicable provisions of 
this Lease, excepting only reasonable wear and tear and casualty.  Any of 
Tenant's Owned Property which shall remain in the Demised Premises after the 
expiration or earlier termination of this Lease shall be deemed to have been 
abandoned and either may be retained by Landlord as Landlord's 


                                          22


property or may be disposed of in such manner as Landlord may see fit, 
provided that, notwithstanding the foregoing, Tenant shall, upon request of 
Landlord made prior to or within a reasonable period after the expiration or 
earlier termination of this Lease, promptly remove from the Buildings any 
such Tenant's Owned Property at Tenant's sole cost and expense.  Should 
Tenant fail to do so, Landlord may do so, and the cost and expense thereof, 
together with interest at the Default Rate from the date such costs and 
expenses are incurred by Landlord, shall be paid by Tenant to Landlord as 
"Additional Rent" within fifteen (15) days after Tenant is billed therefor.  
If such Tenant's Owned Property or any part thereof shall be sold by 
Landlord, Landlord may receive and retain the proceeds of such sale as 
Landlord's property.

22.  SUBORDINATION, ATTORNMENT AND NONDISTURBANCE.

     22.1.     This Lease and the estate, interest and rights hereby created 
are subordinate to any mortgage now or hereafter placed upon the Buildings or 
the Land or any estate or interest therein, including, without limitation, 
any mortgage on any leasehold estate, and to all renewals, modifications, 
consolidations, replacements and extensions of same as well as any 
substitutions therefor.  Tenant agrees that in the event any person, firm, 
corporation or other entity acquires the right to possession of the Buildings 
or the Land, including any mortgagee or holder of any estate or interest 
having priority over this Lease, Tenant shall, if requested by such person, 
firm, corporation or other entity, attorn to and become the tenant of such 
person, firm, corporation or other entity, upon the same terms and conditions 
as are set forth herein for the balance of the Lease Term.  Notwithstanding 
the foregoing, any mortgagee may, at any time, subordinate its mortgage to 
this Lease, without Tenant's consent, by notice in writing to Tenant, and 
thereupon this Lease shall be deemed prior to such mortgage without regard to 
their respective dates of execution and delivery, and in that event, such 
mortgagee shall have the same rights with respect to this Lease as though it 
had been executed prior to the execution and delivery of the mortgage.  
Tenant, if requested by Landlord, shall execute such instruments in 
recordable form as may reasonably be required by Landlord in order to confirm 
or effect the subordination or priority of this Lease, as the case may be, 
and the attornment of Tenant to future landlords in accordance with the terms 
of this Section.

     22.2.     With respect to any existing lease, estate, interest and/or 
mortgage, no later than the date sixty (60) days after Tenant executes and 
delivers this Lease, and with respect to any future lease, estate and/or 
mortgage, on or before the effective date thereof, Landlord shall obtain from 
its lessor and/or mortgagee, as the case may be, a written agreement with 
Tenant in a form substantially in conformity with the form attached hereto as 
Exhibit "M", which agreement shall be binding on their respective legal 
representatives, successors and assigns and shall provide, among other 
provisions, that so long as this Lease shall be in full force and effect (a) 
Tenant shall not be joined as a defendant in any proceeding which may be 
instituted to terminate or enforce the lease or to foreclose or enforce the 
mortgage, and (b) Tenant's possession and use of the Demised Premises in 
accordance with the provisions of this 

                                          23


Lease shall not be affected or disturbed by reason of the subordination to or 
any modification of or default under the ground or underlying lease or 
mortgage. If such lessor and/or mortgagee or any successor -in-interest shall 
succeed to the rights of Landlord under this Lease, whether through 
possession, surrender, assignment, subletting, judicial or foreclosure 
action, or delivery of a deed or otherwise, Tenant will attorn to and 
recognize such successor-landlord as Tenant's landlord and the 
successor-landlord will accept such attornment and recognize Tenant's rights 
of possession and use of the Demised Premises in accordance with the 
provisions of this Lease.  This clause shall be self-operative and no further 
instrument of attornment or recognition shall be required.

23.  BROKERS.  The parties agree that Buschman/Jackson-Cross, Inc. (the 
"Broker") and Cushman and Wakefield, Inc. (the "Cooperating Broker") are the 
real estate broker and cooperating broker, respectively, who have brought the 
parties together in connection with the transactions contemplated hereby and 
that Landlord shall be responsible for all brokerage commissions to be paid 
to Broker and Cooperating Broker on the terms and conditions set forth in a 
separate agreement between Landlord and Broker. Each party represents and 
warrants to the other that he, she or they have not made any agreement or 
taken any action which may cause anyone (other than Broker or Cooperating 
Broker) to become entitled to a commission as a result of the transactions 
contemplated by this Lease, and each will indemnify and defend the other from 
any and all claims, actual or threatened, for compensation by any such third 
person (other than Broker or Cooperating Broker) by reason of such party's 
breach of his, her or their representation or warranty contained in this 
Section.

24.  NOTICES.  All notices or other communications hereunder shall be in 
writing and shall be sent to the address of the party for whom such notice is 
intended as set forth below (or to such other address as a party may 
hereafter designate for itself by notice to the other party as required 
hereby).  Any such notice or communication shall be sufficient if sent by 
registered or certified mail, return receipt requested, postage prepaid, by 
prepaid overnight delivery service, or by hand delivery.  Any such notice or 
communication shall be deemed to have been given: if hand delivered, then 
when delivered or when such delivery is refused; if sent by an overnight 
delivery service, then on the day following the day deposited with such 
service; or if sent by registered or certified mail, then on the third 
business day following the date deposited in the United States mails.  All 
notices and communications to Tenant may also be given by leaving same at the 
Demised Premises during the hours set forth in Section 8 hereof.

                                          24



     24.1. If to Landlord:

                          South Brunswick Investors, L.P.
                          c/o South Brunswick Investment Company, L.L.C.
                          Suite 1105, One Logan Square
                          Philadelphia, PA  19103
                          Attention:  Clay W. Hamlin, III
                    
                          With a required copy to:
                    
                          Saul, Ewing, Remick & Saul
                          3800 Centre Square West
                          Philadelphia, PA  19102
                          Attention:  F. Michael Wysocki, Esquire

     Notice to mortgagees:    All notices by Tenant to Landlord relating to
                          any default by Landlord under this Lease must also 
                          be given by Tenant to the holders of any mortgage
                          on the Land and/or Buildings of which Tenant has
                          notice.

     24.2.   If to Tenant:

                          Teleport Communications Group Inc.
                          One Teleport Drive
                          Staten Island, NY  10311
                          Attention:  General Counsel
                  
                          With a required copy to:
                  
                          Teleport Communications Group Inc.
                          One Teleport Drive
                          Staten Island, NY  10311
                          Attention: S.V.P. Engineering
                  
                          Teleport Communications Group Inc.
                          One Teleport Drive
                          Staten Island, NY  10311
                          Attention: Controller

25.  [INTENTIONALLY OMITTED]

                                          25
\


26.  TERMINATION OPTION.

     26.1.     Tenant, by notice to Landlord (the "Early Termination Notice") 
given no later than one (1) year prior to the Termination Date (as 
hereinafter defined), shall have the one-time right to terminate this Lease 
(the "Termination Option") effective on the date which is three (3) years 
prior to the then-current expiration date of the Lease (the "Termination 
Date").

     26.2.     If Tenant shall exercise the Termination Option, then:

               (i)  Tenant shall pay to Landlord an amount (the "Termination
                    Fee") equal to the sum of  (a) 15 months Fixed Rent for the
                    Demised Premises (calculated based upon the rent scheduled
                    to be paid during the fifteen (15) month period commencing
                    on the Termination Date) and (b) the unamortized portions of
                    any Tenant allowances granted by Landlord pursuant to
                    Sections 27 and 28 and Exhibit "L" hereof and any prepaid
                    broker's commissions (with amortization and such unamortized
                    portions being calculated based upon a ten (10) year level
                    payment amortization schedule at an interest rate of 10%),
                    which Termination Fee shall be due and payable fifty percent
                    (50%) with the delivery of the Early Termination Notice and
                    the balance upon the Termination Date; and

               (ii) the Term shall expire on the Termination Date as if the
                    Termination Date were the Expiration Date, but such
                    expiration shall not release Tenant from its obligations
                    with respect to periods prior thereto.

     26.3.     The Termination Option may only be exercised during the 
initial Term of the Lease (as the same may have been extended pursuant to 
Section 27 and/or 28 hereof) and not during either of the Renewal Terms 
provided for in Section 29.  Moreover, the Termination Option may not be 
exercised by Tenant if Tenant is in default under the terms of this Lease on 
the date which is twelve (12) months prior to the Termination Date.

27.  FIRST OPTION SPACE.

     27.1.     Tenant is hereby granted the option (the "First Option"), to 
be exercised by Tenant, one or more times, to lease certain space containing 
up to 26,425 rentable square feet in the location identified on Exhibit "A" 
on the second floor of Building 2 (the "First Option Space") in one or more 
increments of at least 5,000 rentable square feet each (or the balance of the 
second floor of Building 2, if less).

     27.2.     Tenant shall exercise the First Option, if at all, by giving 
one or more notices (each, a "First Option Notice") to Landlord on or before 
April 1, 1997.  

                                          26



     27.3.     If Tenant elects to exercise the First Option for all or part 
of the First Option Space (the "Exercised First Option Space"):

               (i)  The Exercised First Option Space shall become part of the
                    Demised Premises and all of the terms and conditions of this
                    Lease shall apply to the Exercised First Option Space,
                    except as otherwise provided herein.

               (ii) The commencement date of the Term as to such Exercised First
                    Option Space (the "Exercised First Option Space Commencement
                    Date") shall be the date upon which Landlord delivers the
                    Exercised First Option Space to Tenant (1) free of other
                    tenants and occupants and (2) with all of Landlord's First
                    Option Improvements (as defined in Exhibit "D") completed. 
                    The Exercised First Option Space Commencement Date shall
                    take place not more than ninety (90) days after Landlord's
                    receipt of the First Option Notice or, if the Exercised
                    First Option Space comprises less than the entire second
                    floor of Building 2, not more than ninety (90) days after
                    Landlord and Tenant agree on the location of such Exercised
                    First Option Space pursuant to Section 27.4 below; provided,
                    however, that such ninety (90) day period shall be extended
                    by the duration of any delays due to governmental
                    regulation, unusual scarcity of or inability to obtain labor
                    or materials, labor difficulties, casualty or any other
                    causes not within Landlord's reasonable control.  In the
                    event that the Exercised First Option Space Commencement
                    Date shall not occur within such ninety (90) day period (as
                    extended), Tenant shall (i) receive a credit against Rent
                    and Additional Rent due for such Exercised First Option
                    Space in an amount equal to 200% of the daily Rent due for
                    such Exercised First Option Space multiplied by the number
                    of days by which the Exercised First Option Space
                    Commencement Date is delayed beyond the expiration of such
                    ninety (90) day period (as extended), and (ii) with prior
                    written notice to Landlord be entitled to complete the
                    Landlord's First Option Improvements and charge Landlord for
                    all costs incurred by Tenant thereby.

              (iii) The Annual Fixed Rent for the Exercised First Option
                    Space shall be that set forth in Exhibit "B".  Tenant
                    shall commence paying Annual Fixed Rent and Additional
                    Rent for any Exercised First Option Space ninety (90)
                    days after the Exercised First Option Space
                    Commencement Date for such space (such date, for such
                    space, the "Exercised First Option Space Rent
                    Commencement Date").  

               (iv) Tenant's Proportionate Share from and after the Exercised
                    First Option Space Rent Commencement Date for such space
                    shall be increased based 

                                          27



                    upon the number of additional rentable square feet included
                    in such Exercised First Option Space.  The Operating Expense
                    Allowance and Tax Allowance for all Exercised First Option
                    Space shall be those set forth in Exhibit "C".

               (v)  Tenant shall, within twenty (20) business days after
                    exercising the First Option, submit to Landlord proposed
                    plans and specifications for improvements to be constructed
                    by Tenant in the Exercised First Option Space ("Tenant's
                    First Option Improvements"), which plans and specifications
                    shall be subject to Landlord's approval, not to be
                    unreasonably withheld or delayed.  

                    Landlord shall grant Tenant a Tenant allowance of up to
                    Forty Dollars ($40) per square foot of Exercised First
                    Option Space leased by Tenant pursuant to this Section for
                    construction of the Tenant's First Option Improvements,
                    subject to compliance by Tenant with the provisions in
                    Exhibit "L" in constructing the First Option Space
                    Improvements.  Such allowance shall be payable no earlier
                    than the Exercised First Option Space Rent Commencement Date
                    for such space.

     27.4.     Tenant may exercise the First Option for all or part of the 
second floor of Building 2, provided that, if Tenant exercises the First 
Option for less than all of the second floor of Building 2, then Landlord and 
Tenant shall mutually agree upon the location of the First Option Space and, 
further provided, that the remaining portions of the second floor of Building 
2 must be, in Landlord's reasonable judgment, independently marketable.

     27.5.     If Tenant exercises the First Option for the entire second 
floor of Building 2, the Term of the Lease with respect to the entire Demised 
Premises (including the Exercised First Option Space) shall automatically be 
extended to the date which is ten (10) years from the end of the month in 
which falls the latest Exercised First Option Space Rent Commencement Date.

     27.6.     The First Option may not be exercised by Tenant if Tenant is 
in default under the terms of this Lease on the date of exercise of the First 
Option.

                                          28



28.  SECOND OPTION SPACE.

     28.1.     Provided that Tenant has exercised the First Option for the 
entire second floor of Building 2, Tenant is hereby granted the option (the 
"Second Option"), to be exercised by Tenant one or more times, to lease 
certain space containing up to 28,410 rentable square feet in the location 
identified on Exhibit "A" on the third floor of Building 2 (the "Second 
Option Space"), in one or more increments of at least 5,000 rentable square 
feet each (or the balance of the third floor of Building 2, if less).  

     28.2.     Tenant shall exercise the Second Option, if at all, by giving 
one or more notices (each, a "Second Option Notice") to Landlord on or before 
April 1, 1998.  

     28.3.     If Tenant elects to exercise the Second Option for all or part 
of the Second Option Space (the "Exercised Second Option Space"):

               (i)  The Exercised Second Option Space shall become part of the
                    Demised Premises and all of the terms and conditions of this
                    Lease shall apply to the Exercised Second Option Space,
                    except as otherwise provided herein.

               (ii) The commencement date of the Term as to such Exercised
                    Second Option Space (the "Exercised Second Option Space
                    Commencement Date") shall be the date upon which Landlord
                    delivers the Exercised Second Option Space to Tenant (1)
                    free of other tenants and occupants and (2) with all of
                    Landlord's Second Option Improvements (as defined in Exhibit
                    "D") completed.  The Exercised Second Option Space
                    Commencement Date shall take place not more than ninety (90)
                    days after Landlord's receipt of the Second Option Notice
                    or, if the Exercised Second Option Space comprises less than
                    the entire third floor of Building 2, not more than ninety
                    (90) days after Landlord and Tenant agree on the location of
                    such Exercised Second Option Space pursuant to Section 28.4
                    below; provided, however, that such ninety (90) day period
                    shall be extended by the duration of any delays due to
                    governmental regulation, unusual scarcity of or inability to
                    obtain labor or materials, labor difficulties, casualty or
                    any other causes not within Landlord's reasonable control. 
                    In the event that the Exercised Second Option Space
                    Commencement Date shall not occur within such ninety (90)
                    day period (as extended), Tenant shall (i) receive a credit
                    against Rent and Additional Rent due for such Exercised
                    Second Option Space in an amount equal to 200% of the daily
                    Rent due for such Exercised Second Option Space multiplied
                    by the number of days by which the Exercised Second Option
                    Space Commencement Date is delayed beyond the 

                                          29




                    expiration of such ninety (90) day period (as extended), and
                    (ii) with prior written notice to Landlord be entitled to
                    complete the Landlord's Second Option Improvements and
                    charge Landlord for all costs incurred by Tenant thereby.

              (iii) The Annual Fixed Rent for the Exercised Second Option
                    Space shall be that set forth in Exhibit "B".  Tenant
                    shall commence paying Annual Fixed Rent and Additional
                    Rent for any Exercised Second Option Space ninety (90)
                    days after the Exercised Second Option Space
                    Commencement Date for such space (such date, for such
                    space, the "Exercised Second Option Rent Commencement
                    Date").

               (iv) Tenant's Proportionate Share from and after the Exercised
                    Second Option Space Rent Commencement for such space shall
                    be increased based upon the number of additional rentable
                    square feet included in such Exercised Second Option Space. 
                    The Operating Expense Allowance and Tax Allowance for all
                    Exercised Second Option Space shall be those set forth in
                    Exhibit "C".

               (v)  Tenant shall, within twenty (20) business days after 
                    exercising the Second Option, submit to Landlord proposed 
                    plans and specifications for improvements to be 
                    constructed by Tenant in the Exercised Second Option 
                    Space ("Tenant's Second Option Improvements"), which 
                    plans and specifications shall be subject to Landlord's 
                    approval, not to be unreasonably withheld or delayed.  

                    Landlord shall grant Tenant a Tenant allowance of up to
                    Forty Dollars ($40) per square foot of Exercised Second
                    Option Space leased by Tenant pursuant to this Section for
                    construction of the Tenant's Second Option Improvements,
                    subject to compliance by Tenant with the provisions in
                    Exhibit "L" in constructing the Second Option Space
                    Improvements.  Such allowance shall be payable no earlier
                    than the Exercised Second Option Space Rent Commencement
                    Date for such space.

     28.4.     Tenant may exercise the Second Option for all or part of the 
third floor of Building 2, provided that, if Tenant exercises the Second 
Option for less than all of the third floor of Building 2, then Landlord and 
Tenant shall mutually agree upon the location of the Second Option Space and, 
further provided, that the remaining portions of the third floor of Building 
2 must be, in Landlord's reasonable judgment, independently marketable.

                                          30



     28.5.     If Tenant exercises the Second Option for the entire third floor
of Building 2, the Term of the Lease with respect to the entire Demised Premises
(including the Exercised Second Option Space) shall automatically be extended to
the date which is ten (10) years from the end of the month in which falls the
latest Exercised Second Option Space Rent Commencement Date.

     28.6.     The Second Option may not be exercised by Tenant if Tenant is 
in default under the terms of this Lease on the date of exercise of the 
Second Option.

     28.7.     In the event the Tenant does not exercise any portion of the 
First Option, the Second Option shall apply to the second floor of Building 2 
rather than the third floor (and all references in Sections 28.1 through 28.6 
shall be deemed to refer to the second floor), and Tenant shall have no 
option to lease any space on the third floor.

     28.8.       Tenant will, from the Commencement Date hereof until the 
earlier of (i) the Second Option Space Commencement Date or (ii) July 1, 
1998, pay Landlord each month in advance as Additional Rent the sum of 
$7,102.50 (the "Option Payments") as consideration for the Second Option.  If 
Tenant exercises the First Option for the entire second floor of Building 2 
in accordance with provisions of Section 27 and the Second Option for the 
entire third floor of Building 2 in accordance with the provisions of this 
Section, Landlord will credit all Option Payment monies paid to Landlord 
against Fixed Rent and Additional Rent due under this Lease, until all such 
Option Payments have been fully recovered by Tenant.  If Tenant exercises the 
Second Option for space on the second floor of Building 2 pursuant to the 
provisions of Section 28.6 or for less than all of the third floor of 
Building 2 pursuant to the provisions of Section 28.7, Tenant shall not be 
entitled to any credit for Option Payment monies paid to Landlord. 

29.  RENEWAL TERMS.  Tenant shall have the option to extend the term of this 
Lease for the entire Demised Premises for two consecutive five-year terms 
(each a "Renewal Term"), on the same terms and conditions as set forth herein 
except that (i) Tenant shall be entitled to a Tenant Allowance at the 
commencement of each Renewal Term equal to Ten Dollars ($10) per square foot 
included in the Demised Premises, and (ii) Tenant shall not be entitled to 
any further Renewal Terms after the second Renewal Term.  The Annual Fixed 
Rent during each Renewal Term is set forth in Exhibit "B" hereto.  Each 
option to extend shall be exercised by written notice to Landlord given at 
least 270 days prior to the then-current expiration  date for the Term.  
Notwithstanding anything herein to the contrary, the term shall not be 
extended if Tenant is in default under the terms of this Lease on the date 
which is 270 days prior to the commencement of a Renewal Term.  As used in 
this Lease, the word "Term" and the words "term of this Lease" shall mean the 
initial Lease Term, any extensions pursuant to Sections 27 and/or 28 and any 
Renewal Terms which may become effective.

                                          31



30.  SIGNS.

     30.1.     Tenant may, subject to approval of Landlord not to be 
unreasonably withheld, place its signs on the entrance doors to the Demised 
Premises and in hallways or elevator lobbies on floors wholly leased by 
Tenant. On floors partially leased by Tenant, Tenant may place its signs on 
entrance doors to the Demised Premises and, at Tenant's expense, Landlord 
shall place signs in the hallways leading to the Demised Premises which give 
direction to the Demised Premises.

     30.2.     Landlord, at its expense, shall place a directory board in the 
lobby of Building 2 and, at Tenant's option and expense, shall affix thereto 
Tenant's name and the name of each division, subsidiary, affiliate, partner 
or subtenant of Tenant that is located in the Buildings or within the Project 
limits.  

     30.3.     (a)  So long as Tenant shall lease sixty percent (60%) or more 
of the rentable area in the Buildings, it shall have the right, upon 
Landlord's approval, to (1) name Building 2, and (2) design and designate the 
location of signs naming Building 2.

               (b)  If Tenant shall lease less than sixty percent (60%) of 
the rentable area in the Buildings and if at any time after the execution of 
this Lease Landlord changes the names of the Buildings or installs new or 
substitute signs which are not the names of the Buildings, Landlord shall 
notify Tenant at least sixty (60) days prior to the date of the proposed 
change.

     30.4.     Neither Tenant nor Landlord shall install or permit 
installation of any signs, sculptures and/or graphics which adversely reflect 
on the dignity or character of the Project as a first-class office Project.

     30.5.     In the event of a dispute arising concerning the provisions of 
this Section 30, either party shall be permitted to submit such dispute to 
arbitration under the provisions of Section 32 hereof.

31.  PARKING.

     31.1.     (a)  Landlord shall, at its expense, provide Tenant with 438 
self-parking spaces (which number is based on a minimum of five parking 
spaces per 1,000 rentable square feet in the Demised Premises) within the 
Building Parking Area and Visitors Parking Area (collectively, the "Parking 
Areas") for Tenant's use.  The Parking Areas are shown on Exhibit "K".  The 
Parking Areas shall be available for use twenty-four (24) hours a day, every 
day of the year during the term of this Lease and shall be illuminated when 
necessary to maintain a safe environment.  Further, Landlord shall, at its 
expense, keep and maintain the Parking Areas in a clean, safe and first-class 
condition.

                                          32



               (b)  If Tenant, its employees, licensees or guests are not 
able to use the Parking Areas and access ways thereto because of unauthorized 
use thereof by others, Landlord shall take whatever steps are necessary to 
end and prevent further unauthorized use including, if appropriate, posting 
signs, distributing parking stickers and towing away unauthorized vehicles.

     31.2.     Whenever Tenant shall lease additional space in the Buildings, 
the minimum number of parking spaces in the Building Parking Area allocated 
to Tenant may, at Tenant's option, be increased at no additional cost to 
Tenant by five parking spaces per 1,000 rentable square feet of additional 
space leased by Tenant.

     31.3.     During the terms of this Lease, Landlord shall reserve (as a 
component of the spaces allocated to Tenant pursuant to Section 31.1) at 
least fifty percent (50%) of the parking spaces in the Visitors Parking Area, 
for use by invitees of Tenant and the other tenants in the Buildings.  These 
parking spaces shall be designated for transient use, and Landlord shall take 
reasonable steps to see that these parking spaces are available for such use 
at all times.

     31.4.     Arbitration.  In the event of a dispute arising concerning the 
provisions of this Section 31, either party shall be permitted to submit such 
dispute to arbitration under the provisions of Section 32 hereof.

32.  ARBITRATION.

     32.1.     If arbitration is agreed upon hereunder as a dispute 
resolution procedure, the arbitration shall be conducted as provided in this 
Section.  All proceedings shall be conducted according to the Commercial 
Arbitration Rules of the American Arbitration Association, except as 
hereinafter provided.  No action at law or in equity in connection with any 
such dispute shall be brought until arbitration hereunder shall have been 
waived, either expressly or pursuant to this Section.  The judgment upon the 
award rendered in any arbitration hereunder shall be final and binding on 
both parties hereto and may be entered in any court having jurisdiction 
thereof.

     32.2.     During an arbitration proceeding pursuant to this Section, the 
parties shall continue to perform and discharge all of their respective 
obligations under this Lease, except as otherwise provided in this Lease.

     32.3.     All disputes that may be arbitrated in accordance with this 
Lease shall be raised by notice to the other party, which notice shall state 
with particularity the nature of the dispute and the demand for relief, 
making specific reference by section number and title of the provisions of 
this Lease alleged to have given rise to the dispute.  The notice shall also 
refer to this Section and shall state whether or not the party giving the 
notice demands arbitration under this Section.  If no such demand is 
contained in the notice, the other party against whom

                                          33


relief is sought shall have the right to demand arbitration under this 
Section within five (5) business days after such notice is received.  Unless 
one of the parties demands arbitration, the provisions of this Section shall 
be deemed to have been waived with respect to the dispute in question.

     32.4.     Tenant and Landlord shall mutually and promptly select one 
person who has demonstrated at least ten year's experience in commercial real 
estate matters and, in particular, the subject matter of the dispute, to act 
as arbitrator hereunder.  If a selection is not made within thirty (30) days 
after a demand for arbitration is made, upon the request of either party the 
arbitrator shall be appointed by  The American Arbitration Association.  The 
arbitration proceedings shall take place at a mutually acceptable location in 
New Jersey.

     32.5.     When resolving any dispute, the arbitrator shall apply the 
pertinent provisions of this Lease without departure therefrom in any 
respect. The arbitrator shall not have the power to change any of the 
provisions of this Lease, but this Section shall not prevent in any 
appropriate case the interpretation, construction and determination by the 
arbitrator of the applicable provisions of this Lease to the extent necessary 
in applying the same to the matters to be determined by arbitration.  The 
arbitrator shall limit his deliberations to the following issues only and no 
others:

               (i)  resolution of those disputes expressly agreed in this Lease
                    to be subject to submission to arbitration, and

               (ii) whether an item included in Landlord Statement as Operating
                    Expenses or Real Estate Taxes is properly includable
                    pursuant to Exhibit "C".

33.  ADDITIONAL RIGHTS OF TENANT.

     33.1.     Tenant shall be permitted to install and maintain a generator 
on the existing pad on Lot 2 of the Project, in the location depicted on 
Exhibit "K".  Tenant shall repair any damage to the pad site occasioned 
thereby.  Tenant shall also have exclusive use of an existing fuel tank, 
located in the location on Lot 2 depicted on Exhibit "K".  Landlord shall on 
the Commencement Date deliver possession of  the fuel tank to Tenant empty 
and in a condition in compliance with all applicable Laws.  Tenant shall, 
from and after the Commencement Date, maintain the fuel tank and keep it in 
good repair and condition.

     33.2.     Tenant will have the exclusive right to use of all equipment 
located in the UPS Building, and shall maintain and repair the same.  At the 
termination of this Lease, the equipment shall be surrendered to Landlord in 
as good repair and condition as at the commencement of this Lease, reasonable 
wear and tear and casualty excepted.

                                          34



     33.3.     Tenant may install a generator plug on the outside wall of the 
Building at a location adjacent to the loading dock area to accommodate a 
mobile generator.

     33.4.     Tenant shall be permitted to install four (4) 6" conduits from 
the street to the Buildings.

     33.5.     Tenant shall have the right to contact other tenants within 
the Project regarding sales of Tenant's telecommunication services.

     33.6.     Landlord grants to Tenant the license and right during the 
term of this Lease (i) to utilize space and conduits which exist on the 
Property and in the Buildings during the term of this Lease for the purpose 
of using existing risers and conduit and/or installing conduit (in the event 
existing conduit space is insufficient), (ii) to install cable in, across and 
through such risers and conduit, and (iii) to make connections to all 
electrical and mechanical closets as necessary for the use of such cable for 
the purposes of connection of Tenant's equipment and facilities within the 
Building to Tenant's telecommunication system network outside the Building 
and connection of Tenant's equipment and facilities in the Leased Premises to 
other tenant premises.  The location of such risers and conduit shall be 
designated by Landlord in its reasonable discretion and shall not interfere 
with the use of the Buildings by other tenants.  The method of installation 
of conduit or cable shall be subject to the prior approval of Landlord, which 
approval shall not be unreasonably withheld or delayed.  Tenant shall be 
responsible for maintaining any conduit and cable which is used solely by 
Tenant at its cost.

     33.7.     Tenant shall have the right to install satellite antennae (the 
"Antennae") on the roof of Building 2 in a location approved by Landlord. 
Tenant shall not affix or install said Antennae or its wiring, supports and 
appurtenances so as to cause any penetration of the roof or cause any damage 
thereto which would invalidate the warranty on the roof.  Tenant will be 
solely responsible for all necessary permits and licenses to install and 
operate the Antennae.  Tenant will remove the Antennae at the termination of 
this Lease and repair any damage to the Building caused by its installation 
or removal.  

     33.8.     Tenant shall have the right to install a communication tower 
(such as a microwave facility) (the "Tower"), for its own use and use by its 
customers only, on the Project at a location approved by Landlord not to be 
unreasonably withheld or delayed.  Tenant will be solely responsible for all 
necessary permits and licenses to construct and operate the Tower.  Tenant 
will remove the Tower at the termination of this Lease. 

     33.9.     Prior to exercising any rights under Sections 33.1 through 
33.8, Tenant shall provide Landlord with plans and specifications detailing 
Tenant's plans, which plans and specifications shall be subject to Landlord's 
approval, which approval shall not be unreasonably withheld or delayed, 
provided, however, that such approval may be subject to reasonable conditions 
including, without limitation, that Tenant be required to pay for any out-

                                          35


of-pocket cost to Landlord occasioned thereby.  Tenant shall bear all costs 
incurred in the exercise of its rights set forth above shall exercise these 
rights in full compliance with all applicable governmental laws, regulations 
and rules (including without limitation the obtaining of all required 
permits) or any other requirements reasonably imposed by Landlord.  Tenant 
shall not, in the exercise of its rights under this Section, interfere with 
Landlord, other tenants at the Project and the operations of the Building or 
Project.  Tenant shall take all precautionary steps to protect its facilities 
and the facilities of other affected by performance of work and shall police 
same properly.  Tenant will replace or restore any disturbance or damage it 
caused to the Building or other improvements at the Project.  Any alteration, 
additions or improvements constructed by Tenant in the course of exercising 
its rights under Sections 33.1 through 33.8 shall be deemed to be Tenant 
Improvements.

34.  BUILDING 2 SECURITY.  Tenant agrees that it shall, as part of the Tenant 
Work, install a security system in Building 2 providing for card key access.  
At such time as any tenant other than Tenant shall lease any portion of 
Building 2, Tenant shall, at its sole cost and expense, modify the security 
system (if necessary) so as to provide separately controlled access into the 
Building for such other tenant.

                                           36


35.  RESTRICTIONS ON OTHER TENANTS IN THE BUILDINGS.

     35.1.     In order to protect Tenant's trade secrets and confidential 
information and enhance security in the Demised Premises,  Landlord shall not 
(i) lease any space in the Buildings to, or (ii) consent to any lease, 
sublease or assignment of lease or sublease of any space in the Buildings to, 
or (iii) assign this Lease to, any person or entity which, as a major part of 
its business, (1) leases or sells or otherwise trades in telecommunications 
products or services of the kind sold by Tenant, or (2) provides consulting 
services or advice in the use or application of such products or services.

     35.2.     Landlord shall include the foregoing prohibition in all leases 
which are executed after the date hereof and cover space in the Buildings, 
and shall, in such leases, require the tenant thereunder to include the same 
in all subleases and assignments executed after the date hereof.

     35.3.     Landlord shall consult with Tenant before (i) leasing space in 
the Buildings to any tenant, (ii) approving any subtenant or assignee of any 
tenant in the Buildings, or (iii) making any other commitment which may 
violate this Section.

36.  MISCELLANEOUS.

     36.1.     The obligations of this Lease shall be binding upon and inure 
to the benefit of the parties hereto and their respective successors and 
assigns; provided that Landlord and each successive owner of the Buildings 
and/or the Land shall be liable only for obligations accruing during the 
period of its ownership or interest in the Buildings, and from and after the 
transfer by Landlord or such successive owner of its ownership or other 
interest in the Buildings, Tenant shall look solely to the successors in 
title for the performance of Landlord's obligations hereunder arising 
thereafter.

     36.2.     No delay or forbearance by Landlord in exercising any right or 
remedy hereunder or in undertaking or performing any act or matter which is 
not expressly required to be undertaken by Landlord shall be construed, 
respectively, to be a waiver of Landlord's rights or to represent any 
agreement by Landlord to undertake or perform such act or matter thereafter.

     36.3.     TENANT HEREBY CONSENTS TO THE EXCLUSIVE JURISDICTION OF THE 
COURTS OF THE STATE WHERE THE DEMISED PREMISES ARE LOCATED AND IN ANY AND ALL 
ACTIONS OR PROCEEDINGS ARISING HEREUNDER OR PURSUANT HERETO.  LANDLORD AND 
TENANT AGREE TO WAIVE TRIAL BY JURY IN ANY ACTION, PROCEEDING OR COUNTERCLAIM 
BROUGHT BY EITHER OF THE PARTIES HERETO AGAINST THE OTHER ON ANY MATTER 
WHATSOEVER ARISING OUT OF OR IN ANY WAY CONNECTED WITH THIS LEASE, THE


                                          37



RELATIONSHIP OF LANDLORD AND TENANT AND/OR TENANT'S USE OF OR OCCUPANCY OF 
THE DEMISED PREMISES.  IT IS FURTHER MUTUALLY AGREED THAT IN THE EVENT 
LANDLORD COMMENCES ANY SUMMARY PROCEEDING FOR NON-PAYMENT OF RENT, TENANT 
WILL NOT INTERPOSE ANY COUNTERCLAIM OF WHATEVER NATURE OR DESCRIPTION IN ANY 
SUCH PROCEEDING, UNLESS TENANT CANNOT BRING SEPARATE ACTION.

     36.4.     Tenant shall look solely to the Buildings and rents derived 
therefrom for enforcement of any obligation hereunder or by law assumed or 
enforceable against Landlord, and no other property or other assets of 
Landlord shall be subjected to levy, execution or other enforcement 
proceeding for the satisfaction of Tenant's remedies or with respect to this 
Lease, the relationship of landlord and tenant hereunder or Tenant's use and 
occupancy of the Demised Premises.

     36.5.     All times, wherever specified herein for the performance by 
Landlord or Tenant of their respective obligations hereunder, are of the 
essence of this Lease.

     36.6.     Each covenant and agreement in this Lease shall for all 
purposes be construed to be a separate and independent covenant or agreement. 
 If any provision in this Lease or the application thereof shall to any 
extent be invalid, illegal or otherwise unenforceable, the remainder of this 
Lease, and the application of such provision other than as invalid, illegal 
or unenforceable, shall not be affected thereby; and such provisions in this 
Lease shall be valid and enforceable to the fullest extent permitted by law.

     36.7.     This Lease, including all Exhibits hereto, each of which is 
incorporated in this Lease, contains the entire agreement between the parties 
hereto, and shall not be amended, modified or supplemented unless by 
agreement in writing signed by both Landlord and Tenant, except as 
specifically provided for herein.

     36.8.     The title and headings and table of contents of this Lease are 
for convenience of reference only and shall not in any way be utilized to 
construe or interpret the agreement of the parties as otherwise set forth 
herein.  The term "Landlord" and term "Tenant" as used herein shall mean, 
where appropriate, all persons acting by or on behalf of the respective 
parties, except as to any required approvals, consents or amendments, 
modifications or supplements hereunder when such terms shall only mean the 
parties originally named on the first page of this Lease as Landlord and 
Tenant, respectively, and their agents so authorized in writing.

     36.9.     If Tenant is a corporation or a limited liability company, 
each person signing this Lease on behalf of Tenant represents and warrants 
that he/she has full authority to do so and that this Lease is fully and 
completely binding on the corporation or limited liability company.  If at 
any time during the Lease Term hereunder, or any extension or renewal


                                          38



thereof, Tenant shall change its corporate or company name, by operation of 
law or otherwise, Tenant shall deliver to Landlord a copy of a certificate of 
name change filed with the state of Tenant's jurisdiction evidencing such 
name change, or such other evidence of Tenant's name change and authority as 
is reasonably acceptable to Landlord.  Such evidence shall be delivered to 
Landlord within sixty (60) days after Tenant's official name change.  If 
Tenant is a general partnership, limited partnership or limited liability 
partnership, each person or entity signing this Lease for Tenant represents 
that he/she or it has full authority to sign for the partnership and that 
this Lease is completely and fully binding on the partnership and all general 
partners of the partnership. Tenant shall give written notice to Landlord of 
any general partner's withdrawal or addition and, in the event of a name 
change of the partnership, the same conditions regarding a name change of a 
corporate or limited liability company Tenant, as stated above, shall apply.

     36.10.    This Lease shall be governed by and construed in accordance 
with the laws of the State of New Jersey.

     36.11.    Within ten (10) days after receipt, Landlord and Tenant shall 
advise the other party in writing, and provide the other with copies of (as 
applicable), any notices alleging violation of the Americans with 
Disabilities Act of 1990 ("ADA") relating to any portion of the Demised 
Premises; any claims made or threatened in writing regarding noncompliance 
with the ADA and relating to any portion of the Demised Premises; or any 
governmental or regulatory actions or investigations instituted or threatened 
regarding noncompliance with the ADA and relating to any portion of the 
Demised Premises.

     36.12.    If Tenant is comprised of more than one signatory, each 
signatory shall be jointly and severally liable with each other signatory for 
payment and performance according to this Lease.

     36.13.    Any covenants set forth in this Lease which, by their nature, 
would reasonably be expected to be performed after the expiration or earlier 
termination of this Lease, shall survive the expiration or earlier 
termination of this Lease.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement of 
Lease to be executed on the day and year first above written.

                                   LANDLORD:

                                   SOUTH BRUNSWICK INVESTORS, 
                                   L.P., a Delaware limited partnership

                                             By:  South Brunswick Investment
                                             Company, L.L.C.


                                          39



                                        
By:________________________________________________
                                               Name:
_______________________________________
                                               Title:
_______________________________________


                                   TENANT:

                                   TELEPORT COMMUNICATIONS GROUP INC.



   By:__________________________________________________
                                          Name:
________________________________________________
                                          Title:
________________________________________________


                                          40


 

                                     EXHIBIT "A"

                      PLAN OF DEMISED PREMISES AND OPTION AREAS




 

                                     EXHIBIT "B"

                                    RENT SCHEDULE





                                     EXHIBIT "C"

                 TAXES, OPERATING EXPENSE AND OTHER ADDITIONAL RENT

     1.   TAXES.

          A.   DEFINITIONS

               I.   "ADJUSTED TAXES" shall mean the Taxes for any Tax Year, plus
                    the expenses of any contests (administrative or otherwise)
                    of tax assessments or proceedings for refunds incurred
                    during such Tax Year.  If Landlord is successful in
                    obtaining a refund for any Tax Year(s), the Adjusted Taxes
                    for the Tax Year(s) to which such refund is applicable shall
                    be recalculated to reflect the amount of the refund received
                    by Landlord, and Tenant shall receive a credit, if
                    appropriate, equal to the amount of the difference between
                    the Tax Adjustment which was actually paid by Tenant and the
                    Tax Adjustment which actually is due, taking into account
                    the amount of the refund.

               II.  "TAX ADJUSTMENT" shall have the meaning set forth in
                    Subsection 1B below.  

               III. "TAX ALLOWANCE" shall mean the actual Taxes for Tax Year
                    1996.

               IV.  "TAX ESTIMATE" shall have the meaning set forth in
                    Subsection 1B below.

               V.   "TAX STATEMENT" shall mean a statement in writing signed by
                    Landlord, setting forth (a) the Adjusted Taxes for the
                    applicable Tax Year, (b) the Tax Allowance, (c) the Tax
                    Adjustment payable for such Tax Year, or portion thereof,
                    and (d) such other information as Landlord deems
                    appropriate.

               VI.  "TAX YEAR" shall mean each calendar year, or such other
                    period of twelve (12) months as hereafter may be duly
                    adopted by the applicable governmental or quasi-governmental
                    body or authority or special service district as its fiscal
                    year for purposes of Taxes, occurring during the Lease Term.

               VII. "TAXES" shall mean all taxes, charges, impositions, levies,
                    assessments and burdens of every kind and nature, whether
                    general or special, ordinary or extraordinary, foreseen or
                    unforeseen, assessed or imposed 


                                         C-1



                    by any governmental or quasi-governmental body or authority
                    or special service district on and/or with respect to the
                    Land or the Buildings or their operation or the rents
                    therefrom (including taxes based on gross receipts), whether
                    or not directly paid by Landlord, subject to the following:

                    (1)  there shall be excluded from Taxes all income taxes,
                         excess profit taxes, excise taxes, franchise taxes,
                         estate, succession, inheritance and transfer taxes;
                         provided, however, that if, due to a future change in
                         the method of taxation or assessment, any such tax,
                         however designated, shall be imposed in substitution,
                         in whole or in part, for (or in lieu of all or any part
                         of any contemplated increase in) any tax, charge,
                         imposition, levy, assessment or burden which would
                         otherwise be included within the definition of Taxes,
                         such other tax shall be deemed to be included within
                         the definition of Taxes as defined herein to the extent
                         of such substitution or imposition in lieu; and 

                    (2)  there shall be excluded from Taxes any use and
                         occupancy tax, which shall be paid by Tenant to the
                         appropriate governmental authority; provided, however,
                         that Tenant shall pay such use and occupancy tax to
                         Landlord as Additional Rent upon demand if Landlord is
                         required by law to collect such tax for any
                         governmental authority, in which case Landlord shall
                         remit any amounts paid to Landlord to the appropriate
                         governmental authority.

             VIII.  "TENANT'S PROPORTIONATE SHARE" shall mean a fraction, 
                    the numerator of which shall be the rentable square feet
                    of the Demised Premises, and the denominator of which shall
                    be the aggregate rentable square feet in the Buildings, and,
                    expressed as a percentage, shall be 61.49% (87,550/142,385).
                    If the rentable square feet of the Demised Premises 
                    increases or decreases during any Operating Year or Tax
                    Year, the rentable square feet of the Demised Premises for
                    purposes of determining the numerator of the fraction shall
                    be the weighted average of the rentable square feet in the
                    Demised Premises for such Operating Year or Tax Year.

          B.        PAYMENT OF TAX ADJUSTMENT.  If the Adjusted Taxes for any
                    Tax Year shall be in excess of the Tax Allowance, Tenant
                    shall pay to Landlord as Additional Rent an amount equal to
                    Tenant's Proportionate Share of such excess.  (The amount of
                    Tenant's Proportionate Share of such excess is hereinafter
                    referred to 


                                         C-2



                    as the "Tax Adjustment".)  If the Commencement Date is any
                    date other than the first day of a Tax Year or if the
                    expiration date of the Lease Term is any date other than the
                    last day of a Tax Year, the Tax Adjustment shall be
                    allocated proportionately to the amount of time in such Tax
                    Year that the Lease Term is in effect.

                    Tenant shall pay to Landlord, on account of the Tax
                    Adjustment for each Tax Year, monthly installments in
                    advance equal to one-twelfth (1/12) of the estimated Tax
                    Adjustment for such Tax Year  (the "Tax Estimate").  Such
                    installments shall be payable at such place as Landlord may
                    direct.  From time to time during any Tax Year, Landlord may
                    furnish to Tenant the Tax Estimate for such Tax Year and, on
                    the first day of the first month following the receipt of
                    such Tax Estimate, in addition to the monthly installment of
                    such new Tax Estimate, Tenant shall pay to Landlord (or
                    Landlord shall credit to Tenant) any deficiency (or excess)
                    between (i) the total of the installments paid on account of
                    the Tax Adjustment for such Tax Year, and (ii) the product
                    of one-twelfth (1/12) of such Tax Estimate for such Tax Year
                    and the number of months which have elapsed during such Tax
                    Year prior to the due date of such payment.  Until the Tax
                    Estimate for any Tax Year is furnished by Landlord, Tenant
                    shall continue to pay monthly installments on account of
                    such Tax Year's Tax Adjustment based upon the last Tax
                    Estimate provided by Landlord to Tenant.  Following the end
                    of each Tax Year, Landlord shall furnish to Tenant a Tax
                    Statement.  On the first day of the first month following
                    the receipt of such Tax Statement, Tenant shall pay to
                    Landlord (or Landlord shall credit or refund to Tenant) any
                    deficiency (or excess) between the installments paid on
                    account of the preceding Tax Year's Tax Adjustment and the
                    actual Tax Adjustment for such Tax Year.

                    Notwithstanding the foregoing, Landlord from time to time
                    during the Term may elect to waive the requirement for
                    payment of monthly installments on account of the Tax
                    Adjustment and, in such case, Tenant shall pay the full
                    amount of any unpaid Tax Adjustment within fifteen (15) days
                    after Tenant receives any Tax Statement.  Furthermore,
                    notwithstanding the foregoing, more than one (1) Tax
                    Statement may be sent to Tenant during any Tax Year.  Such
                    election by Landlord shall not preclude Landlord from
                    thereafter requiring Tenant to commence paying monthly
                    installments on account of the Tax Adjustment as set forth
                    above.

               C.   TAX CONTEST.

                    In consideration of Tenant's undertaking to reimburse 
                    Landlord for Tenant's Share of an increase in Real Estate
                    Taxes, Tenant shall have the right, by 


                                       C-3



                    appropriate proceedings, to protest any assessment or 
                    reassessment or any special assessment, or any change in 
                    the tax rate, or the validity of any of the above.  
                    During the pendency of any protest, Landlord shall be 
                    permitted to continue to pay any disputed taxes and 
                    Tenant shall continue to reimburse Landlord in 
                    accordance with the provisions of Section 1(B) above.

                    Landlord shall notify Tenant in writing of all 
                    assessments and the tax rates and any proposed changes to
                    them.  Tenant shall notify Landlord in writing within 
                    fifteen (15) business days after receipt of Landlord's 
                    notice if Tenant wants to file a protest.  If Landlord 
                    receives written notice of a change in assessment and 
                    fails to give notice to Tenant of such change and, as a 
                    result, Tenant is unable to review the change, and if it 
                    so desires, to files a protest, Tenant shall not be 
                    obligated to reimburse Landlord for any increase in Real 
                    Estate Taxes resulting therefrom.

                    In the tax proceedings, Tenant may act in its own name 
                    and/or the name of Landlord and Landlord will, at 
                    Tenant's request and provided Landlord is not put to any 
                    expense thereby, cooperate with Tenant in any way Tenant 
                    may reasonably require in connection with such protest.  
                    Any protest conducted by Tenant hereunder shall be at 
                    Tenant's expense and if interest or late charges become 
                    payable with respect to the Real Estate Taxes as a 
                    result, Tenant shall reimburse Landlord for the same.  
                    However, Landlord shall be solely responsible for any 
                    penalties, interest or late charges imposed on Landlord 
                    through no fault of Tenant.  

                    Tenant shall be responsible for posting any security 
                    and/or paying any fees required in connection with any 
                    protest initiated by Tenant.

                    Landlord agrees to keep Tenant apprised of all tax 
                    protest filings and proceedings undertaken by Landlord or 
                    others to obtain a tax reduction or refund.  Landlord may 
                    deduct from the total refund any reasonable attorneys' 
                    fees and other reasonable expenses incurred by Landlord 
                    therefor.  However, if the refund or reduction resulted 
                    from Tenant's efforts, Landlord shall also reimburse 
                    Tenant for reasonable attorneys' fees and any other 
                    reasonably expenses incurred by Tenant in connection with 
                    the protest, such reimbursement not to exceed Tenant's 
                    Proportionate Share of the refund or reduction.

 
                                         C-4
                                           


2.   OPERATING EXPENSE.

     A.   DEFINITIONS. 

               I.   "ESSENTIAL CAPITAL IMPROVEMENT" shall mean (a) a labor
                    saving device, energy saving device or other installation,
                    improvement or replacement which is intended to reduce
                    Operating Expense, whether or not voluntary or required by
                    governmental mandate, or (b) an installation or improvement
                    required by reason of any law, ordinance or regulation which
                    was not applicable to the Buildings on the date of the
                    execution of this Lease, or (c) an installation or
                    improvement intended to improve the health or safety of
                    tenants in the Buildings generally, whether or not voluntary
                    or required by governmental mandate.

               II.  "OPERATING EXPENSE" shall mean all costs and expenses of
                    whatever kind or nature paid or incurred by Landlord from
                    time to time in connection with the ownership, management,
                    maintenance, operation, replacement, restoration and repair
                    of the Buildings and the Land, all computed on the accrual
                    basis, including, without limitation, the following items:

                    (a)  gas, oil, electricity, steam, fuel, water, sewer and
                         other utility charges (including surcharges) of
                         whatever nature (excepting electricity charges for
                         usage by tenants for which any such tenant is billed
                         separately), including, without limitation, the
                         proportion of costs (including but not limited to oil,
                         gas and electricity, repairs and personnel) of the
                         central heating and air conditioning plant located on
                         Lot 2 allocable to the provision of services to the
                         Buildings;

                    (b)  insurance premiums and the amounts of any deductibles
                         paid by Landlord;

                    (c)  on-site building personnel costs, including, but not
                         limited to, salaries, wages, fringe benefits, taxes,
                         insurance and other direct and indirect costs;

                    (d)  costs of service and maintenance contracts including,
                         but not limited to, standard trash removal, cleaning
                         and security services;
                                           

                                         C-5



                    (e)  Landlord's share, as owner of Lot 1, of costs relating
                         to maintenance and operation of the Project which are
                         shared and allocated among owners of lots comprising
                         the Project;

                    (f)  all other maintenance, preventive maintenance,
                         painting, repair, restoration and replacement expenses
                         (including, but not limited to, all of Landlord's
                         repairs in Section 8), and the cost of materials,
                         supplies and uniforms;

                    (g)  the cost of an on-site office and segregated storage
                         area for Landlord's parts, tools, supplies;

                    (h)  all professional fees incurred in connection with the
                         operation of the Buildings;

                    (i)  management fees payable to the managing agent, provided
                         that such management fees shall not exceed 2% of annual
                         fixed and additional rent payable by all tenants of the
                         Buildings;

                    (j)  sales and use taxes and any taxes imposed on personal
                         property owned by Landlord and used in connection with
                         the Buildings and taxes on any of the expenses which
                         are included in Operating Expense; 

                    (k)  decorations for the lobby and other public portions of
                         the Buildings;

                    (l)  all costs and expenses of maintaining (including snow
                         removal), repairing and replacing paving, curbs,
                         walkways, driveways, roadways and landscaping; and

                    (m)  the annual amortization of any Essential Capital
                         Improvement made by Landlord, computed based on the
                         useful life of the improvement with interest at the
                         prime rate referenced in Section 3 of the Lease
                         determined as of the date of completion of such
                         Essential Capital Improvement.  If Landlord shall lease
                         such Essential Capital Improvement, then the rentals or
                         other operating costs paid pursuant to such lease shall
                         be included in Operating Expense for each Operating
                         Year in which they are incurred.


                                         C-6



                    Notwithstanding the foregoing, Operating Expense shall not
                    include the following:  

                    (i)    costs to prepare space for occupancy by a new tenant;

                    (ii)   costs of capital improvements (except for costs of 
                           any Essential Capital Improvement); 

                    (iii)  advertising expenses and leasing commissions; 

                    (iv)   any cost or expenditure for which Landlord is
                           reimbursed, whether by insurance proceeds or 
                           otherwise, but not including costs and expenditures
                           for which Landlord is reimbursed by tenants of the 
                           Buildings pursuant to operating expense reimbursement
                           provisions; 

                    (v)    legal expenses of negotiating and enforcing leases;

                    (vi)   special cleaning or other services not offered to all
                           tenants of the Buildings; 

                    (vii)  any charge for depreciation, interest or rental
                           (except as set forth above with respect to any
                           Essential Capital Improvement); 

                    (viii) the cost of removal of asbestos-containing material 
                           not related to the repair, maintenance or restoration
                           of equipment, as referred to in Section 8; 

                    (ix)   salaries of Landlord's officers and partners and its
                           headquarters staff; 

                    (x)    the cost of any repair made in accordance with 
                           Sections 11 or 12 of this Lease, except to the extent
                           such cost is not reimbursed by insurance; 

                    (xi)   any costs representing an amount paid to an 
                           affiliated person of Landlord which is in excess of
                           the amount which would have been paid in the absence
                           of such relationship; and

                    (xii)  any expenses of repairs or maintenance which are
                           covered by warranties, guarantees or service
                           contracts (excluding any mandatory deductibles).


                                         C-7



                           In determining Operating Expense for any Operating 
                           Year, if the Buildings were less than fully 
                           occupied during such entire year, or were not in 
                           operation during such entire year, then Operating 
                           Expense shall be adjusted by Landlord to reflect 
                           the amount that such expenses would normally be 
                           expected to have been, in the reasonable opinion 
                           of Landlord, had the Buildings been fully occupied 
                           and operational throughout such year, except that 
                           in no event shall such adjustment result in the 
                           recovery by Landlord of an amount in excess of the 
                           actual Operating Expense.  In addition, if 
                           Landlord is not furnishing any particular work or 
                           service (the cost of which, if performed by 
                           Landlord, would constitute an Operating Expense) 
                           to a tenant who has undertaken to perform such 
                           work or service in lieu of performance by 
                           Landlord, Operating Expense shall nevertheless be 
                           deemed to include the amount Landlord would 
                           reasonably have incurred if Landlord had in fact 
                           performed the work or service at its expense.

                      III. "OPERATING EXPENSE ADJUSTMENT" shall have the 
                           meaning set forth in Subsection 2B below.  

                       IV. "OPERATING EXPENSE ALLOWANCE" shall mean the 
                           actual Operating Expense for Operating Year 1996, 
                           adjusted as set forth above.

                        V. "OPERATING EXPENSE ESTIMATE" shall have the 
                           meaning set forth in Subsection 2B below.

                       VI. "OPERATING EXPENSE STATEMENT" shall mean a 
                           statement in writing signed by Landlord, setting 
                           forth in reasonable detail (a) the Operating 
                           Expense for the applicable Operating Year, (b) the 
                           Operating Expense Allowance, (c) the Operating 
                           Expense Adjustment for such Operating Year, or 
                           portion thereof, and (d) such other information as 
                           Landlord deems appropriate.
 
                      VII. "OPERATING YEAR" shall mean each calendar year, or 
                           such other period of twelve (12) months as 
                           hereafter may be adopted by Landlord as its fiscal 
                           year for purposes of Operating Expense, occurring 
                           during the Lease Term.

          B.        PAYMENT OF OPERATING EXPENSE ADJUSTMENT.  If the Operating
                    Expense for any Operating Year shall be in excess of the
                    Operating Expense Allowance, Tenant shall pay to Landlord as
                    Additional Rent an amount equal to Tenant's Proportionate
                    Share (as defined in Subsection 1A of this Exhibit) of such
                    excess. 


                                         C-8



                    (The amount of Tenant's Proportionate Share of such excess
                    is hereinafter referred to as the "Operating Expense
                    Adjustment".)  If the Commencement Date is any date other
                    than the first day of an Operating Year or if the expiration
                    date of the Lease Term is any date other than the last day
                    of an Operating Year, the Operating Expense Adjustment shall
                    be allocated proportionately to the amount of time in such
                    Operating Year that the Lease Term is in effect.  

                    Tenant shall pay to Landlord, on account of the Operating
                    Expense Adjustment for each Operating Year, monthly
                    installments in advance equal to one-twelfth (1/12) of the
                    estimated Operating Expense Adjustment for such Operating
                    Year  (the "Operating Expense Estimate").  Such installments
                    shall be payable at such place as Landlord may direct.  From
                    time to time during any Operating Year, Landlord may furnish
                    to Tenant the Operating Expense Estimate for such Operating
                    Year and, on the first day of the first month following
                    receipt of such Operating Expense Estimate, in addition to
                    the monthly installment of such new Operating Expense
                    Estimate, Tenant shall pay to Landlord (or Landlord shall
                    credit to Tenant) any deficiency (or excess) between (i) the
                    total of the installments paid on account of the Operating
                    Expense Adjustment for such Operating Year, and (ii) the
                    product of one-twelfth (1/12) of such Operating Expense
                    Estimate for such Operating Year and the number of months
                    which have elapsed during such Operating Year prior to the
                    due date of such payment.  Until the Operating Expense
                    Estimate for any Operating Year is furnished by Landlord,
                    Tenant shall continue to pay monthly installments on account
                    of such Operating Year's Operating Expense Adjustment based
                    upon the last Operating Expense Estimate provided by
                    Landlord to Tenant.  Following the end of each Operating
                    Year, Landlord shall furnish to Tenant an Operating Expense
                    Statement.  On the first day of the first month following
                    the receipt of such Operating Expense Statement, Tenant
                    shall pay to Landlord (or Landlord shall credit or refund to
                    Tenant) any deficiency (or excess) between the installments
                    paid on account of the preceding Operating Year's Operating
                    Expense Adjustment and the actual Operating Expense
                    Adjustment for such Operating Year.

                    Tenant shall have the right, during regular business hours,
                    to inspect the books and records used by Landlord in
                    calculating the Operating Expense Adjustment for a
                    particular Operating Year, upon not less than thirty (30)
                    days prior notice given any time within two (2) years
                    following Tenant's receipt of the Operating Expense
                    Statement for such year; provided, however, that Tenant
                    shall make all payments required hereunder without delay. 
                    Unless Tenant shall take written exception to any Operating
                    Expense Statement within sixty (60) days after the end of
                    such two (2) year period (such date, the "Exception Date"),
                    such statement shall be final and binding upon Tenant. 
                    Tenant's inspection of 


                                         C-9



                    Landlord's books and records shall be performed by an
                    employee or employees of Tenant or by a reputable public
                    accounting firm or real estate company.  Tenant agrees that
                    all information obtained by Tenant or by those performing
                    such inspection on behalf of Tenant shall at all times
                    remain confidential, and Tenant further agrees to take such
                    action as is necessary to insure the continued
                    confidentiality of all such information.

                    Landlord shall be permitted to adjust the Operating Expense
                    Adjustment for a particular Operating Year any time up to
                    the Exception Date relating to such Operating Year. 
                    Thereafter, such Operating Expense Statement shall be final
                    and binding upon Landlord. 

     3.   PERSONAL PROPERTY TAXES.  Tenant shall be responsible for all ad
          valorem taxes on its personal property and on the value of the
          leasehold improvements in the Demised Premises to the extent that the
          same exceed building standard allowances (and if the taxing
          authorities do not separately assess Tenant's leasehold improvements,
          Landlord may make a reasonable allocation of imposition to such
          improvements). 

     4.   SURVIVAL.  If, upon expiration or termination of this Lease for any
          cause, the amount of any Additional Rent due under this Lease has not
          yet been determined, an appropriate payment from Tenant to Landlord,
          or refund from Landlord to Tenant, shall be made promptly after such
          determination, and such obligation shall survive the expiration or
          termination of this Lease.


                                        C-10


 



                                    EXHIBIT "D"

                                          
                            SCHEDULE OF LANDLORD'S WORK


At no cost to Tenant, Landlord will provide the following items:

     ORIGINAL LEASE:

          GENERAL:

                    1.   Provide access and other characteristics specified in
                         the Americans with Disabilities Act to main lobby,
                         restrooms, elevators and other applicable core areas.

          Exterior:

                    1.   Repair and repaint damaged paint areas on facade of
                         Buildings.
                    2.   Relandscape Building entry areas, computer room dock 
                         and Building Parking Area islands.
                    3.   Design and install Project identification sign at main 
                         park entrance from Ridge Road.
                    4.   Install concrete walkway over existing mechanical pit
                         at east lobby entrance.

          ELEVATORS:*

                    1.   Install new 3,500 lb. passenger elevator at 90 degrees
                         to existing elevator, a matching new cab in existing
                         elevator, and improved controls for the pair.  Cabs to
                         be manufacturer's standard with plastic laminate wall
                         panels and carpeted floor.
                    2.   Install new 4,500 lb. freight elevator adjacent to
                         south stair tower and main truck dock.

          LOBBY:

                    1.   Install new anodized aluminum entrance doors.
                    2.   Improve layout and finishes, including terrazzo floors,
                         vinyl wall covered walls, and lay-in acoustical tile
                         and drywall ceiling.
                    3.   Improve incandescent lighting and HVAC accordingly.

          Restrooms:



               1.   Install a pair of new restrooms in core of Floors 1 and 2 to
                    meet standard office code requirements.  Finishes to be
                    ceramic tile floor and base, painted drywall walls, lay-in
                    acoustical ceiling, fluorescent lighting, and plastic
                    laminate vanity counters.

     OPTION 1

          None

     OPTION 2 (If on 3rd Floor)

               1.   Install a pair of new restrooms in core of 3rd Floor to meet
                    standard office code requirements.  Finishes to be ceramic
                    title floor and base, painted drywall walls, lay-in
                    acoustical ceiling, fluorescent lighting, and plastic
                    laminate vanity counters.

*  Tenant acknowledges that the two new elevators may not be completed by the 
Commencement Date and agrees to accept possession of the Demised Premises 
with elevator service initially to be provided by the existing elevator (with 
improved temporary finishes).  Landlord shall diligently pursue completion of 
the new elevators and shall complete the new elevators not later than August 
31, 1996, subject to delays attributable to any action or inaction of Tenant, 
or due to casualty or other causes not within Landlord's reasonable control. 


                                        D-2



                                    EXHIBIT "E"

                             JANITORIAL SPECIFICATIONS

DAILY - Night time coverage Monday through Friday.

     1.   OFFICE AREAS

          a.   Empty all trash containers and waste baskets.
          b.   Replace all trash liners.
          c.   Empty all ashtrays and receptacles and wipe clean with damp
               cloth.
          d.   Dust all uncluttered desktops, file cabinets, counters, sills and
               ledges.
          e.   Vacuum all carpeted traffic lanes.
          f.   Dust mop and spot mop tile floors.
          g.   Vacuum all entrance mats and runners.
          h.   Remove smudges and finger prints from all doors, door frames,
               partitions and switch plates.
          i.   Arrange all furniture neatly.
          j.   Wash and squeegee all entrance door glass, both sides.
          k.   Clean all entrance frames and ledges.
          l.   Highlight all lobbies, elevators, conference room and executive
               areas to maintain superior level of appearance.
          m.   Remove all trash in specifically designated area and dispose of
               in prescribed manner.  (Only service provided to MMC, data center
               and computer room.)
          n.   Clean and polish all drinking fountains.
          o.   Remove finger prints and smudges and dust all sills and ledges.
          p.   Clean all coffee stations.
          q.   Clean chalkboards.
          r.   Provide shared use of day porter.

     2.   Restrooms

          a.   Clean and disinfect all restrooms.
          b.   Empty all waste containers.
          c.   Dry mop floor.
          d.   Fill all dispensers.
          e.   Spray disinfect all fixtures and urinals inside and outside.
          f.   Clean all toilet fixtures and urinals inside and outside.
          g.   Clean all sinks and counter tops.
          h.   Clean and polish all mirrors and brightwork.
          i.   Clean and polish outside of all waste containers.
          j.   Wash floor with disinfectant cleaner making sure all corners are
               cleaned.



WEEKLY

          a.   Vacuum and spot clean all carpets.
          b.   Wipe desks and telephones.
          c.   Sweep stairwells.

MONTHLY

          a.   Clean all ceramic tile walls.
          b.   Clean all diffusers, registers and Venetian blinds.
          c.   Wash interior glass, both sides.
          d.   Wash stairwell treads and landings.

SEMI-ANNUALLY

          a.   Clean outside of windows.
          b.   Damp wipe diffusers and vents.

ANNUALLY

          a.   Clean inside of windows.
          b.   Shampoo carpeted traffic lanes.
          c.   Strip and refinish resilient floors.
          d.   Clean vertical surfaces.

                                        E-2
 

 

                                  EXHIBIT "F"


                              RULES AND REGULATIONS

1.   Definitions.  Wherever in these Rules and Regulations the word "Tenant" is
used, it shall be taken to apply to and include Tenant and its agents,
employees, invitees, licensees, subtenants and contractors, and is to be deemed
of such number and gender as the circumstances require.  The word "room" shall
be taken to include the space covered by this Lease.  The word "Landlord" shall
be taken to include the employees and agents of Landlord.

2.   Construction.  The streets, sidewalks, entrances, halls, passages,
elevators, stairways and other common areas provided by Landlord shall not be
obstructed by Tenant, or used by it for any other purpose than for ingress and
egress.

3.   Washrooms.  Toilet rooms, water-closets and other water apparatus shall not
be used for any purposes other than those for which they are constructed.

4.   General Prohibitions.  In order to insure proper use and care of the
Buildings, without Landlord's prior written consent, to be withheld or granted
in Landlord's sole discretion, Tenant shall not:

          a.   Allow any sign, advertisement, notice or other marking to be
affixed to the interior or exterior of the Buildings, other than any signs which
are located within the Demised Premises and are not visible from outside of the
Demised Premises;

          b.   Make improper noises or disturbances of any kind;

          c.   Mark or defile elevators, water-closets, toilet rooms, walls,
windows, doors or any other part of the Buildings;

          d.   Place anything on the outside of the Buildings, including roof
setbacks, window ledges and other projections;

          e.   Use or place any curtains, blinds, drapes or coverings over any
windows or upon the window surfaces which are visible from the outside of the
Demised Premises; 

          f.   Other than in connection with normal office decoration, fasten
any article, drill holes, drive nails or screws into the walls, floors,
woodwork, window mullions, or partitions; nor shall the same be painted, papered
or otherwise covered or in any way marked or broken;

          g.   Interfere with the heating or cooling apparatus;

                                 F-1



          h.   Allow anyone but Landlord's employees to clean rooms;

          i.   Leave the Demised Premises without locking doors, stopping all
office machines (other than those machines required to be operated at all
times), and extinguishing all lights;

          j.   Install any shades, blinds, or awnings;

          k.   Use any electrical heating device;

          l.   Install call boxes or any kind of wire in or on the Buildings;

          m.   Manufacture any commodity, or prepare to dispense any foods or
beverages, whether by vending or dispensing machines or otherwise (other than as
may be permitted in any kitchenette/vending area(s) located within the Demised
Premises for use by Tenant's employees), or alcoholic beverages, tobacco, drugs,
flowers, or other commodities or articles;

          n.   Secure duplicate keys for rooms, except from Landlord, or change
the locks of any doors to or in the Demised Premises;

          o.   Give its employees or other persons permission to go upon the
roofs of the Buildings; or

          p.   Place door mats in public corridors.

5.   Publicity.  Tenant shall not use the names of the Buildings or South
Brunswick Corporate Center in any way in connection with its business except as
the address thereof.  Landlord also shall have the right to prohibit any
advertising by Tenant which, in Landlord's opinion, tends to impair the
reputation of the Buildings or South Brunswick Corporate Center or their
desirability as buildings or locations for offices; and upon written notice from
Landlord, Tenant shall refrain from or discontinue such advertising.

6.   Business Machines.  Business machines and mechanical equipment which cause
vibration, noise, cold or heat that may be transmitted to the Buildings
structures or to any leased space outside the Demised Premises shall be placed
and maintained by Tenant, at its sole cost and expense, in settings of cork,
rubber or spring type vibration eliminators sufficient to absorb and prevent
such vibration, noise, cold or heat.

                                   F-2



7.   Movement of Equipment.  Landlord reserves the right to designate the time
when and the method whereby freight, small or large office equipment, furniture,
safes and other like articles may be brought into, moved, or removed from the
Buildings or rooms, and to designate the location for temporary disposition of
such items.  In no event shall any of the foregoing items be taken from Tenant's
space for the purpose of removing same from the Buildings, other than in the
ordinary course of Tenant's business, without the express consent of both
Landlord and Tenant.

8.   Public Entrance.  Landlord reserves the right to exclude the general public
from the Buildings upon such days and at such hours as in Landlord's judgment
will be for the best interest of the Buildings and its tenants.  Persons
entering the Buildings after 6:00 p.m. on business days and at all times on
Saturdays, Sundays and holidays may be required to sign a register maintained
for that purpose.

9.   Rights Reserved to Landlord.  Without abatement or diminution in rent,
Landlord reserves and shall have the following additional rights:

          a.   To change the name and/or street address of the Buildings;

          b.   To install and maintain a sign or signs on the exterior of the
Buildings;

          c.   To approve all sources furnishing sign painting and lettering,
ice, drinking water, towels and toilet supplies, and other like services used on
the Demised Premises;

          d.   To make, either voluntarily or pursuant to governmental
requirement, repairs, alterations or improvements in or to the Buildings or any
part thereof and during alterations, to close entrances, doors, windows,
corridors, elevators or other facilities, provided that such acts (except in
emergencies) shall not unreasonably interfere with Tenant's use and occupancy of
the Demised Premises as a whole;

          e.   If Tenant vacates all or any portion of the Demised Premises
prior to the expiration of the Lease Term, to decorate, remodel, repair, alter
or otherwise prepare all or such portion of the Demised Premises, as applicable,
for re-occupancy;

          f.   To constantly have pass keys to the Demised Premises, which keys
Landlord must secure at all times;

          g.   To grant to anyone the exclusive right to conduct any particular
business or undertaking in the Buildings; and

          h.   To take any and all measures, including inspections, repairs,
alterations, additions and improvements to the Demised Premises or to the
Buildings, as may be necessary or

                                      F-3



desirable in the operation of the Buildings, provided that such acts (except
in emergencies) shall not unreasonably interfere with Tenant's use and occupancy
of the Demised Premises as a whole.

Subject to the provisions hereof, Landlord may enter upon the Demised Premises
and may exercise any or all of the foregoing rights hereby reserved without
being deemed guilty of an eviction or disturbance of Tenant's use or possession
and without being liable in any manner to Tenant.

10.  Regulation Change.  Landlord shall have the right to make such other and
further reasonable Rules and Regulations, as in the judgment of Landlord, may
from time to time be needful for the appearance, care and cleanliness of the
Buildings, for the preservation of good order therein, and for the health and
safety of the tenants and their visitors, provided that all such Rules and
Regulations shall be enforced by Landlord in a nondiscriminatory fashion. 
Landlord shall not be responsible to Tenant for any violation of Rules and
Regulations by any other tenant, but shall use reasonable efforts to enforce
such compliance with the Rules and Regulations.

10.  Conflict with Lease.  If the terms of this Exhibit shall be in conflict
with the terms set forth in the body of the Lease, the terms set forth in the
body of the Lease shall prevail.




                                     F-4
                                           

 

                                  EXHIBIT "G"

                                   FORM OF
                 TENANT ESTOPPEL CERTIFICATE AND STATEMENT
                 -----------------------------------------

                        -------------------------
                                (Tenant)

     The undersigned (jointly and severally if more than one) hereby 
represents, warrants and certifies to _______________________ (the 
"Landlord") that it is the tenant and present occupant (the "Tenant") of 
certain premises (the "Demised Premises") comprising a portion of the real 
property and improvements in the buildings (the "Buildings") located at 
___________________________ and that:

1.   Basic Lease Terms - The Demised Premises are more specifically described 
     in, and are leased under the provisions of, a lease agreement (the
     "Lease"), the basic terms of which are described below:

     1.1.  Demised Premises/Suite: _____________; Floor_______
     1.2.  Rentable Square Feet of Demised Premises: _________
     1.3.  Date of Lease: ____________________________________
     1.4.  Commencement Date: _____________________________
     1.5.  Expiration Date: __________________________________
     1.6.  Current Annual/Monthly Fixed Rent: $_____ / $______
     1.7.  Current Monthly Additional Rent: $_________________
     1.8.  Total Monthly Rent As of            : $____________
     1.9.  Tenant's Proportionate Share: ____________________%
     1.10. Security Deposit: $________________________________
     1.11. Total Rent Is Paid Through: _______________________

2.   Modifications.  The Lease contains all of the understandings and
     agreements between Tenant and Landlord, and is in full force and effect, 
     without modification, addition, extension, or renewal on the date hereof, 
     except as indicated below:

     ___________________________________________________________________________

     ___________________________________________________________________________

     __________________________________________________________________________.

                                    G-1



3.   Acceptance of Demised Premises.  Tenant has accepted possession of the
     Demised Premises and is now in possession of same, and the improvements and
     space required to be furnished according to the Lease have been fully 
     delivered by Landlord and accepted by Tenant.

4.   Options.  There are no purchase options, rights of first refusal, rights 
     of first offer, options to terminate, exclusive business rights, or other
     rights in Tenant to extend or renew the Lease Term or to expand or 
     otherwise modify the Demised Premises, except as indicated below:

     ________________________________________________________________________
     ________________________________________________________________________
     ________________________________________________________________________

5.   Commencement of Rental Obligation.  Tenant's obligation to pay rent has 
     commenced, unless indicated below: _____________________________________
     ________________________________________________________________________.

6.   Rent Payment.  No rent has been paid by Tenant in advance under the
     Lease, except for the Total Monthly Rent, as described above, that became 
     due for the current month.

7.   No Tenant Default.  Tenant is not in default under the Lease and is
     current in the payment of any and all charges required to be paid by 
     Tenant, except as indicated below:

     ________________________________________________________________________

     ________________________________________________________________________

     ________________________________________________________________________

8.   Subordination and Attornment.  In the event that Landlord's interest
     is conveyed or Landlord otherwise relinquishes possession of the Demised
     Premises to a third party, including but not limited to any mortgagee or
     successor in interest to any such mortgagee, the undersigned agrees to 
     attorn to such third party and to recognize such third party as landlord.
     Tenant agrees to subordinate to any mortgagee or successor in interest to 
     any such mortgagee as more fully set forth in the Lease.  Any such 
     attornment or subordination shall be effective and self-operative without 
     the execution of any other instrument by either party hereto but, upon the 
     request of such landlord, the undersigned shall execute and  deliver an 
     instrument confirming such attornment or subordination.

                                      G-2



9.   No Defense.  Tenant has no defenses, set-offs, basis for withholding
     of rent, claims or counterclaims against Landlord for any failure of 
     performance of any of the terms of the Lease, nor to the best of Tenant's 
     knowledge are there defaults or breaches by Landlord under the Lease, 
     including, without limitation, defaults relating to the design, condition 
     and tenant uses of the Buildings.

10.  No Prior Assignment or Subletting.  Tenant has not assigned, pledged,
     mortgaged or otherwise transferred or encumbered the Lease or the rental
     payments thereunder, nor sublet all or any part of the Demised Premises 
     and is not presently permitting the same to be occupied or used by anyone 
     other than Tenant except as indicated below:                      

     ________________________________________________________________________

     ________________________________________________________________________

     _______________________________________________________________________.

11.  Use of Premises.  Tenant has not accumulated, recycled, stored,
     treated, spilled, emitted, leaked or disposed of any hazardous, toxic or
     polluting substances or wastes at the property.  Tenant has not received 
     notice from any governmental agency that it may be responsible for clean-
     up of the property or surrounding areas pursuant to the Federal 
     Comprehensive Environmental, Response, Compensation and Liability Act, 42 
     U.S.C. Section 9601 et seq., the Federal Water Pollution Control Act (33 
     U.S.C.A. Section 1151 et seq.), the Clean Water Act of 1977 (33 U.S.C.A. 
     Section 1251 et seq.), or the regulations promulgated thereunder (if 
     applicable), or any other federal, state or local environmental law, 
     regulation or ordinance.

          The undersigned makes this Certificate and Statement with the
understanding that Landlord and any others with which Landlord may be dealing
intend to rely upon this Certificate and Statement and the undersigned agrees
that they may so rely.

Dated: ________________, 199_.


   ________________________________________
                                     (Name of Tenant)

                               G-3



                                   By:______________________________________
                                      Name:
                                      ______________________________________
                                      Title:
                                      ______________________________________
 

                                    G-4



                               EXHIBIT "H"

                     PROPERTY ENVIRONMENTAL STATUS

     IBM, the former owner of the property, manufactured computer punch cards
and printer ribbons at the South Brunswick facility during which time IBM
utilized a common degreasing agent known as TCA.  In December 1977, TCA was
discovered in the groundwater beneath the Land.  As a result, IBM entered into
an Administrative Consent Order ("ACO") with the New Jersey Department of
Environmental Protection ("NJDEP") to perform a groundwater remediation program
which is still ongoing. IBM is solely responsible for the complete remediation
of the Land with respect to pre-purchase conditions to current NJDEP standards. 
The ACO, as amended, is filed of public record.


 

                               EXHIBIT "I"

        HEATING, VENTILATION AND AIR CONDITIONING SPECIFICATIONS


     Landlord shall provide air conditioning and winter humidification on a 
year-round basis throughout the Demised Premises and Common Building 
Facilities. The equipment shall maintain a uniform (1) indoor temperature of 
76 degrees F.D.B. at 50% R.H, 5% automatic control in summer based on the 
local 2-1/2% outdoor design condition as specified in the latest edition of 
the "ASHRAE HANDBOOK OF FUNDAMENTALS" and (2) indoor temperature of 72 
degrees F.D.B. at 30% R.H. minimum in winter based on the local 97.5% outdoor 
design condition as specified in the latest edition of the "ASHRAE HANDBOOK 
OF FUNDAMENTALS". Automatic reset on the humidifiers to prevent condensation 
on walls and glass during extreme cold weather shall be installed.  
Temperature control shall be automatic and shall maintain temperature set at 
plus or minues 2 degrees F.  All systems shall conform to local and national 
codes.  In the event that Tenant exercises any right under the Lease, or 
otherwise, to modify the Building Service System or Leased Premises Service 
System, such that the air conditioning and winter humidification systems do 
not meet the above standards, Tenant shall be responsible for performing such 
additional work so that the air conditioning and winter humidification 
systems do meet the above standards.  


 

     
                              EXHIBIT "J"

                               HOLIDAYS

     
                              New Year's Day
                              Presidents' Day     
                              Memorial Day
                              Independence Day*
                              Labor Day
                              Thanksgiving
                              Day following Thanksgiving
                              Christmas*


                    *    When July 4 or Christmas falls on a Tuesday, Monday is
                         also deemed a Holiday; and when July 4 or Christmas
                         falls on a Thursday, Friday is also deemed a Holiday.

 

                                   EXHIBIT "K"

                         PLAN OF PROPERTY AND PARKING AREAS

                                (to be provided)


 

                                  EXHIBIT "L"

                                  TENANT WORK

     
1.   Completion Schedule.  Within sixty (60) days after the execution of this
Lease, Tenant shall deliver to Landlord, for Landlord's review and approval, a
schedule ("Work Schedule") setting forth a timetable for the planning and
completion of the installation of improvements to be constructed by Tenant in
the Demised Premises (the "Tenant Work").  The Work Schedule shall set forth
each of the various items of work to be done by or approval to be given by
Landlord and Tenant in connection with the completion of the Tenant Work.  Such
Work Schedule shall be submitted to Landlord for its approval and, upon approval
by both Landlord and Tenant, such Work Schedule shall become the basis for
completing the Tenant Work.

2.   Tenant Work.  Reference herein to "Tenant Work" shall include all work to
be done in the Demised Premises pursuant to the Tenant Work Plans described in
Section 3 below, including, but not limited to, partitioning, doors, ceilings,
floor coverings, wall finishes (including paint and wall covering), electrical
(including lighting, switching, telephones, outlets, etc.), plumbing, heating,
ventilating and air conditioning, fire protection, cabinets and other millwork.

3.   Tenant Work Plans.  Immediately after the execution of the Lease, Tenant's
architect shall prepare final working drawings and specifications for the Tenant
Work.  Such final working drawings and specifications are referred to herein as
the "Tenant Work Plans."  The Tenant Work Plans must be consistent with Landlord
standards, conform to all applicable laws, ordinances, regulations, codes and
other requirements of governmental authorities and with the regulations of
Landlord's insurance underwriter and meet the further requirements set forth in
the Schedule attached hereto.  Any such working drawings shall be reviewed and
approved or disapproved by Landlord (any disapproval being accompanied by a
detailed explanation of the reason for such disapproval) within thirty (30) days
after submission to Landlord.  Following approval of such working drawings, or
revised working drawings, as the case may be, the working drawings shall be
submitted to the appropriate governmental bodies by Tenant's architect for plan
checking, the issuance of a building permit, and securing of all other necessary
governmental approvals.  Tenant, with Landlord's cooperation and subject to
Landlord's approval, not to be unreasonably withheld, shall cause to be made any
changes in the plans and specifications necessary to obtain the building permit.

4.   Construction of Tenant Work.  After the Tenant Work Plans have been
prepared and approved, and a building permit for the Tenant Work has been
issued, Tenant, upon Landlord's approval, shall enter into a construction
contract with its contractor for the installation of the Tenant Work in
accordance with the Tenant Work Plans.  All contractors or subcontractors of
Tenant, and any contract entered into between Tenant and any contractor,

                                  L-1



shall be approved by Landlord prior to work commencement.  Tenant shall
supervise the completion of such work and shall use due diligence to secure
substantial completion of the work in accordance with the Work Schedule.  The
Tenant Work shall be constructed in accordance with the Tenant Work Plans
approved by Landlord, the requirements of all applicable laws, ordinances,
regulations, codes and other requirements of governmental authorities and with
the regulations of Landlord's underwriter.  In addition, the Tenant Work shall
be constructed in a thorough, first-class and workmanlike manner, shall
incorporate only new materials and shall be in good and usable condition at the
date of completion.  At any time and from time to time during the construction
of the Tenant Work, Landlord, Landlord's architect and Landlord's general
contractor may enter upon the Demised Premises and inspect the Tenant Work and
take such steps as they may deem necessary for the protection of the Buildings
and/or any premises adjacent to the Demised Premises.  Such inspection shall,
however, be for Landlord's benefit only and may not be relied upon by Tenant or
any other party.  A portion of the cost of constructing the Tenant Work shall be
paid as provided in Section 5 hereof.  

5.   Payment of Cost of the Tenant Work.

     (a)  Landlord hereby grants to Tenant a "Tenant Allowance" of up to Forty
Dollars ($40.00) per square foot of Rentable Area of the Demised Premises for a
total of up to Three Million Five Hundred Two Thousand Dollars ($3,502,000.00). 
Such Tenant Allowance shall be used only for:

               (1)  Preparing the drawings and specifications, including
architectural, mechanical, electrical, plumbing and structural drawings and all
other aspects of the Tenant Work Plans.

               (2)  Plan check, permit and license fees relating to construction
of the Tenant Work.

               (3)  Construction of the Tenant Work, including, without
limitation, the following:

                    (a)  Installation within the Demised Premises of all
                         partitioning, doors, floor coverings, ceilings, wall
                         coverings and painting, millwork and similar items.

                    (b)  All electrical wiring, lighting fixtures, outlets,
                         emergency generators and switches, and other electrical
                         work to be installed within or outside of the Demised
                         Premises.

                                        L-2



                    (c)  The furnishing and installation of all duct work,
                         terminal boxes, diffusers and accessories required for
                         the completion of the heating, ventilation and air
                         conditioning systems within the Demised Premises.

                    (d)  Any additional Tenant requirements including, but not
                         limited to, odor control, special heating, ventilation
                         and air conditioning, noise or vibration control or
                         other special systems.

                    (e)  All fire and life protection systems such as fire
                         walls, alarms, including accessories, safety control
                         systems, sprinklers, fire piping, and wiring installed
                         within the Demised Premises.

                    (f)  Installation of the security systems in the Buildings. 

                    (g)  All plumbing, fixtures, pipes and accessories to be
                         installed within the Demised Premises.

                    (h)  Testing and inspection costs.

                    (i)  Reasonable contractors' fees, including, but not
                         limited to, any fees based on general conditions.

          (4)  All other out-of-pocket costs to be expended by Landlord in the
approval or construction of the Tenant Work, excluding those costs incurred by
Landlord for construction of Landlord's Work, as noted in Exhibit "D".

     (b)  The cost of each item shall be charged against the Tenant Allowance. 
In the event that the cost of installing the Tenant Work, as established by
Tenant's final pricing schedule, shall exceed the Tenant Allowance, or if any of
the Tenant Work is not to be paid out of the Tenant Allowance as provided above,
the excess shall be paid by Tenant.

6.   Completion and Rental Commencement Date.  The commencement of the Term 
of the Lease and Tenant's obligation for the payment of Fixed Rent under the 
Lease shall commence on the dates specified in the Lease.  At any time after 
the Commencement Date, the Tenant Allowance shall be paid by Landlord (x) to 
Tenant to reimburse Tenant for amounts theretofore paid to Tenant's vendors, 
suppliers or contractors upon receipt of paid invoices, or (y) directly to 
Tenant's vendors, suppliers or contractors, promptly upon Landlord's receipt 
of invoices for the cost of the work delivered by Tenant to Landlord for 
payment to such vendors, suppliers or contractors together with a letter (a 
"Direction of Payment Letter") authorizing and directing Landlord to pay such 
invoices, and, provided that whether Landlord shall reimburse Tenant pursuant 
to clause (x) or shall pay Tenant's vendors, suppliers or 

                                     L-3



contractors pursuant to clause (y), Landlord shall have received (a) a 
certificate signed by Tenant and Tenant's Architect setting forth (i) that 
the sum then requested was paid or is owed by Tenant and was or is due to 
contractors, subcontractors, materialmen, engineers and other persons who 
have rendered services or furnished materials in connection with work on the 
Tenant Work, (ii) a complete description of such services and materials and 
the amounts paid or to be paid to each of such persons in respect thereof, 
(iii) that the work described in the certificate has been completed 
substantially in accordance with the Tenant Work Plans and (iv) the amount of 
all previous payments made by Landlord hereunder with respect to Tenant Work 
and that no part of the sums being requested were part of a prior request for 
which payment was made, (b) paid receipts or such other proof of payment as 
Landlord shall reasonably require for all such work completed (other than 
that which is the subject of the then pending disbursement in the event 
Landlord is paying Tenant's vendors, suppliers or contractors directly) and 
(c) lien waivers satisfactory to Landlord executed by any contractors or 
subcontractors furnishing labor or supplying materials in connection with 
such work with respect to all portions thereof previously completed (other 
than that which is the subject of the then pending disbursement in the event 
Landlord is paying Tenant's vendors, suppliers or contractors directly).  
Landlord shall reimburse Tenant or pay such invoices on behalf of Tenant 
within thirty (30) days after Landlord's receipt of a written request for 
reimbursement from Tenant or Direction of Payment Letter and shall debit the 
Tenant Allowance therefor, provided further, however, that (x) Tenant shall 
not submit a request for reimbursement or a Direction of Payment Letter more 
than once per calendar month, (y) an amount equal to 10% of the Tenant 
Allowance shall be held back by Landlord until Tenant has complied with all 
of its obligations.

7.   Insurance.

     (a)  All of Tenant's contractors shall maintain the following insurance
coverages in the minimum amounts specified below or such greater amounts as may
be required by Landlord based upon the risks of the project or good insurance
practices:  

               (1)  Commercial General Liability Insurance including
                    Products/Completed Operations, Owners and Contractors
                    Protective Liability and Broad Form Contractual Liability
                    with the exclusion pertaining to explosion collapse and
                    underground property damage hazards eliminated.  

               (2)  Business Automobile Liability Insurance including owned,
                    hired, and non-owned automobiles.

               (3)  Statutory Workers' Compensation Insurance, including
                    occupational disease with employers' liability limits not
                    less than mandated by statute.

                                  L-4



     (b)  In addition to the foregoing insurance coverages, during the course of
construction, Tenant or Tenant's general contractor or construction manager
shall maintain "All-risk" builder's risk insurance for the full replacement cost
of the Tenant Work.

     (c)  The insurance identified under a(i) and (ii) above shall (a) be in
such amounts as may be reasonably determined by Landlord (but not less than
$1,000,000 or more than $5,000,000), depending on the scope and nature of the
Tenant Work, (b) name Landlord and any other parties designated by Landlord as
additional insureds, (c) be in companies licensed to do business in New Jersey
and reasonably satisfactory to Landlord, and (d) provide that the policies will
not be changed, canceled or expire until at least thirty (30) days prior written
notice has been given to Landlord.  Evidence of all coverage shall be delivered
to Landlord prior to any such contractor or subcontractor commencing work in the
Buildings.  The liability of Tenant, its contractors and subcontractors shall
not be limited because of the insurance required hereunder nor to the amounts
thereof nor because of any exclusions from coverage in any insurance policy.

8.   Performance Bonds.  Unless Tenant or its general contractor provides
payment and performance bonds for the full cost of the Tenant Work, each
contract and subcontract providing for materials and/or services with a value in
excess of $25,000 shall require the Tenant's general contractor thereunder to
obtain payment and performance bonds in the full amount of its contract or
subcontract.  All bonds required pursuant to this provision shall be in form
reasonably acceptable to Landlord, shall be issued by reputable surety companies
licensed to do business in New Jersey and shall name Landlord and Tenant as
obligees. 

9.   Landlord Procedures.  Tenant shall comply with all procedures and policies
established by Landlord from time to time relating to construction by tenants in
the Building.  

10.  Coordination of Work.  Construction of the Tenant Work shall be coordinated
with all work being performed by Landlord and other occupants of the Building to
the end that the Tenant Work will not interfere with the operation of the
Building or interfere with or delay the completion of any other construction
within the Building.  Such work shall be performed in a manner so as not to
disturb or annoy other tenants or occupants of the Building and shall be
performed only during such hours and under such conditions as shall be
established by Landlord.

11.  Safety.  Tenant shall cause Tenant's contractors to (i) take all
precautions necessary for the prevention of accidents and for the safety of
persons and property, (ii) comply with all applicable laws, ordinances, rules,
regulations and orders of any public authority relating thereto, and (iii)
promptly report to Landlord any injury and furnish Landlord a written accident
report within 24 hours of the accident and a copy of the accident report filed
with its insurance carrier at the time of filing of such report.  

                                 L-5



12.  Miscellaneous.
 
     (a)  Tenant and Tenant's contractors shall be solely responsible for the
transportation, safekeeping and storage of materials and equipment used in the
performance of the Tenant Work, for the removal of waste and debris resulting
therefrom, and for any damage caused by them to any part of the Project.  It
shall be Tenant's responsibility to cause each of Tenant's contractors to
maintain continuous protection of adjacent property and improvements against
damage by reason of the performance of the Tenant Work.  It shall also be
Tenant's responsibility to cause each Tenant's contractor to properly protect
the Tenant Work.  Any damage caused by Tenant's contractors to any portion of
the Building or to any property of Landlord or of any occupant or tenant of the
Building shall be repaired to its condition prior to such damage at no expense
to Landlord.

     (b)  Tenant shall cause Tenant's contractors to (i) keep the Demised
Premises and adjacent areas, as well as the loading docks, elevators, logistic
areas and surrounding areas, free from accumulations of waste material or
rubbish, (ii) keep dirt and dust from infiltrating into adjacent tenant, common
and mechanical areas, (iii) protect the front and top of all perimeter HVAC
units and thoroughly clean them upon completion of work, (iv) block off supply
and return grills, diffusers and ducts to keep dust from entering into the
building HVAC system, (iii) forthwith remove all rubbish, tools, equipment and
materials from in and about the Demised Premises and the Buildings upon
completion of the work. 

     (c)  Tenant's contractors may not use any space within the Building for
storage handling or moving of materials or equipment and/or for the location of
a field office or facilities for the employees of such contractor or
subcontractor without obtaining Landlord's prior written approval for each such
use.  If any Tenant's contractor shall use any space in the Building for any or
all of the aforesaid enumerated purposes or any other similar purpose without
obtaining Landlord's written approval therefor, Landlord shall have the right to
terminate such use and remove all of such Tenant's Contractor's materials,
equipment and other property from such space, without Landlord being liable to
Tenant and/or to such Tenant's contractor, and the cost of such termination
and/or removal shall be paid by Tenant to Landlord.

     (d)  Tenant shall promptly pay all Tenant's contractors or apply for such
payment under the Tenant Allowance.  Should any lien be made or filed in
connection with the Tenant Work the cost of which is Tenant's responsibility,
Tenant shall bond against or discharge the same within (10) days after receiving
notice thereof.  If Tenant shall fail to cause such lien to be bonded against or
to be discharged within such period, then, in addition to any other right or
remedy which Landlord may have under this Lease, at law or in equity, Landlord
may, but shall not be obligated to, discharge the same either by paying the
amount claimed to be due or by procuring the discharge of such lien by deposit
or by bonding.  Any amount so paid by Landlord and all costs and expenses
incurred by Landlord in connection therewith, together 

                                 L-6



with interest at the Default Rate from the respective dates of Landlord's making
of the payment and incurring of the cost and expense, shall constitute
Additional Rent payable by Tenant under this Lease and shall be paid by Tenant
to Landlord on demand.

     (e)  Upon completion of the Tenant Work, Tenant shall furnish Landlord with
contractors' affidavits and full and final waivers of liens and receipted bills
covering all labor and materials.

     (f)  Within sixty (60) days after the Tenant Work have been completed,
Tenant shall provide Landlord with a complete set of reproducible, record
drawings for the Buildings showing as-built conditions, including any manuals,
warranties or other such documents relating to the Tenant Work.

     (g)  Tenant shall indemnify, defend and hold harmless Landlord, its agents,
contractors and employees from and against all claims, damages, liabilities,
losses and expenses of whatever nature, including but not limited to, reasonable
attorneys' fees, arising out of or resulting from the negligence or willful
misconduct of Tenant, Tenant's contractors, or their respective agents and
employees in the course of exercising its rights under this Exhibit "L".  Tenant
shall provide or cause to be provided in all contracts with each Tenant's
contractor that such Tenant's contractor shall indemnify, defend and hold
harmless Landlord, its agents and employees, from and against all claims,
damages, liabilities, losses and expenses of whatever nature, including but not
limited to, reasonable attorneys' fees, arising out of or resulting from the
negligence or willful misconduct of such Tenant's contractor or its agents or
employees in connection with the performance of the Tenant Work.  The foregoing
indemnities shall be in addition to the insurance requirements set forth in this
Exhibit and shall not be in discharge or substitution of same, and shall not be
limited in any way by any limitations on the amount or type of damages.

                                    L-7


 
                                 Schedule

     In addition to complying with the requirements for Plans and Specifications
generally (as set forth in this Exhibit "L"), the Tenant Work Plans shall comply
with the following requirements:

1.   Architectural drawings must include the following:

     (a)  Partition locations and types (including any slab-to-slab partitions
          or special acoustical treatment required);
     (b)  Door locations, door schedule, door frames and the swing of each door;
     (c)  Reflected ceiling plan;
     (d)  Millwork items;
     (e)  Hardware schedule;
     (f)  Finish schedule showing all finish types and locations; and
     (g)  Telephone rooms in addition to Base Building telephone closets.

2.   Structural drawings must include the following:

     (a)  Location of any floor openings and stair drawings;
     (b)  Location and extent of any floor loading beyond building standard; and
     (c)  Any structural changes caused by Tenant's design (including raised
          flooring).

3.   Electrical drawings must include the following:

     (a)  Location and extent of any special electric requirements caused by
          equipment such as computer hardware, copiers or supplemental A/C units
          (i.e., separate circuiting, coaxial cabling, etc.);
     (b)  Estimate of total electrical load on each floor;
     (c)  Location of all electrical outlets, switches, telephone outlets, exit
          signs, and lighting fixtures;
     (d)  Location of all computer equipment systems and special audio-visual
          equipment; and
     (e)  Location and type of all fire alarm system devices and wiring.

4.   Heating, ventilating and air conditioning (HVAC) drawings must include the
     following:

     (a)  Location of any duct work, ceiling diffusers, and thermostats;
     (b)  Variable air volume (VAV) unit quantities and sizing information;
     (c)  Location and sizing of any supplemental HVAC equipment; and
     (d)  Estimate of total HVAC load on each floor.

                                L-8



5.   Plumbing drawings must include the following (if applicable):

     (a)  Location of kitchen, kitchenettes, etc.;
     (b)  Location of drinking fountains; and
     (c)  Location of sinks and toilets (other than base building).

6.   Sprinkler and other fire suppression system drawings and specifications and
design calculations.

7.   Tenant security system must include:

     (a)  A preliminary outline equipment brochure and riser diagram indicating
          all components (electrical power characteristics, voltages, and
          specific locations on plan);
     (b)  All requirements for dedicated circuits;
     (c)  All requirements for bonding and grounding;
     (d)  All requirements for outside connections to the telephone company or a
          central protective alarm agency;
     (e)  All emergency circuiting requirements; and
     (f)  The type, sizes, quantities and location of all required cable and
          circuit.




                                  L-9



                             EXHIBIT "M"


     SUBORDINATION, ATTORNMENT AND NON-DISTURBANCE AGREEMENT


          THIS SUBORDINATION, NON-DISTURBANCE AND ATTORNMENT AGREEMENT (this
"Agreement") is made and entered into this ____ day of ___________, 19__, by and
among Teleport Communications Group Inc., a Delaware corporation ("Tenant''),
with a mailing address of _______________________________________, and
______________________________, a __________ corporation ("Mortgagee"), with a
mailing address of ______________________________________________ and South
Brunswick Investors, L.P., a Delaware limited partnership ("Landlord") with a
mailing address of __________________________________.

                              W I T N E S S E T H:

          WHEREAS, Landlord and Tenant have entered into a lease (the "Lease")
dated ____________________ of certain premises (the "Premises") situate
___________________, erected on the tract of land described in Exhibit "A"
attached hereto and made a part hereof; and

          WHEREAS, Landlord is about to make, execute and deliver to Mortgagee a
certain promissory note secured by a first lien Mortgage on the Premises (the
"Mortgage"); and

          WHEREAS, the Lease will be assigned by Landlord to Mortgagee as
further security for the promissory note.

          NOW, THEREFORE, in consideration of the mutual promises hereinafter
contained and other good and valuable consideration, the receipt and sufficiency
whereof are hereby acknowledged, Tenant and Mortgagee, intending to be legally
bound hereby, covenant and agree as follows:

          1.   The Lease shall be subject and subordinate to the lien of the
Mortgage and to all the terms, conditions and provisions thereof, and to any
renewals, extensions, modifications or replacements thereof, to the full extent
of the principal sum secured by the Mortgage, all interest accrued and from time
to time unpaid thereon and any other amounts required to be paid by the terms of
the Mortgage and the instruments secured thereby, unless Mortgagee elects to
subordinate the mortgage to the Lease.


                                  M-1



          2.   Provided Tenant is not in default beyond the applicable grace
period provided for in the Lease:

               (a)  Tenant shall not be joined as an adverse or party defendant
in any action or proceeding which may be instituted or commenced by Mortgagee to
foreclose or enforce the Mortgage, unless Tenant is deemed to be a necessary
party.

               (b)  Tenant shall not be evicted from the Premises nor shall any
of Tenant's rights under the Lease be affected or disturbed in any way by reason
of this subordination or any modifications of or default under the Mortgage.

               (c)  Tenant's leasehold estate under the Lease shall not be
terminated or disturbed during the term of the Lease as it may be extended, by
reason of any default under the Mortgage.

               (d)  Provided Landlord is not in default under the terms of the
Mortgage, Mortgagee hereby subordinates and subjects its right to any portion of
the insurance proceeds otherwise payable to Landlord and/or Mortgagee, when and
to the extent necessary for Landlord to comply with its obligations of repair
and restoration as required by the provisions of the Lease.

               (e)  If Mortgagee or any successor in interest to it shall
succeed to the rights of Landlord under the Lease, whether through possession,
termination or cancellation of the Lease, surrender, assignment, judicial
action, sublettings, foreclosure action or delivery of a deed or otherwise,
Tenant will attorn to and recognize such successor-landlord as Tenant's landlord
and the successor-landlord will accept such attornment and recognize Tenant's
rights of possession and use of the Premises in accordance with the provisions
of the Lease and, without further evidence of such attornment and acceptance,
the parties shall be bound by and comply with all the terms, provisions,
covenants and obligations contained in the Lease, on their respective parts to
be performed.  Such successor-landlord shall not, however, be:

                    (i)  liable for any act or omission of Landlord or any prior
landlord;

                    (ii) obligated to Tenant for any security deposit or other
sums deposited with any prior landlord (including Landlord) under the Lease and
not physically delivered to Mortgagee;

                    (iii)     bound by any rent or additional rent which the
Tenant might have paid for more than the current month to any prior landlord
(including Landlord);

                                         M-2



                    (iv) bound by any amendment or modification of the Lease or
any cancellation or surrender of the Lease made without the consent of Mortgagee
subsequent to the date hereof;

                    (v)  subject to any offsets, claims or defenses which Tenant
might have against any prior landlord (including Landlord);

                    (vi) bound or liable under any written or oral notice given
by Tenant to Landlord or any prior landlord; or

                   (vii) obligated or liable (financially or otherwise) on
account of any representation, warranty, or indemnification obligation of
Landlord with respect to hazardous materials, asbestos, or other environmental
laws, claims or liabilities, whether expressly stated as such or subsumed within
general obligations to comply with laws or preserve the benefits of Tenant's use
and enjoyment of the Premises.

          3.   Tenant will not exercise any remedy set forth in the Lease by
reason of a default by landlord thereunder unless and until Tenant has given
Mortgagee written notice of the default at the same time Landlord is notified
thereof, at Mortgagee's address stated on page one hereof or such other address
designated in writing to Tenant, and has afforded Mortgagee such time as under
the Lease is granted to Landlord to remedy the particular default.

          4.   Landlord and Tenant each agree not to amend, modify or accept a
termination of the Lease without the prior written consent of the Mortgagee and
that no such amendment, modification or termination will be effective as against
Mortgagee or its successors or assigns without such consent.

          5.   (a)  Tenant will not pay an installment of rent or any part
thereof more than thirty (30) days prior to the due date of such installment.

               (b)  After notice from Mortgagee to Tenant, Tenant will pay to
Mortgagee, or to such person or firm designated by Mortgagee, all rentals and
other monies due and to become due to Landlord under the Lease.

          6.   This Agreement shall inure to the benefit of and be binding upon
the parties hereto and their respective heirs, executors, distributees,
administrators, legal representatives, successors and assigns and may not be
modified orally or by any course of conduct other than except by a written
instrument signed by both parties hereto.

          7.   All notices required or permitted by this Agreement shall be
given by (i) hand delivery, (ii) U.S. Registered or Certified Mail, return
receipt requested, or (iii) nationally reputable overnight courier service, and
shall be addressed to the recipient at the 

                                    M-3



respective address specified in the opening paragraph of this Agreement.  No
notice shall be effective unless and until actually received.  

          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed under seal as of the day and year first above written.

                                   TENANT:

                                   TELEPORT COMMUNICATIONS GROUP INC.


                                   ____________________________________
                                   By:
                                   Name:
                                   Title:


                                   LANDLORD:

                                   SOUTH BRUNSWICK INVESTORS, L.P.


                                   ____________________________________
                                   By:
                                   Name:
                                   Title:


                                   MORTGAGEE:


                                   ____________________________________
                                   By:
                                   Name:
                                   Title:






                                      M-4









                              Notary Form of Landlord
                ---------------------------------------------------
                               Notary Form of Tenant
                ---------------------------------------------------
                              Notary Form of Mortgagee


                                    M-5




                         AMENDMENT TO LEASE AGREEMENT

          THIS AMENDMENT TO LEASE AGREEMENT dated as of the 1st day of 
September, 1996, by and between SOUTH BRUNSWICK INVESTORS, L.P., a Delaware 
limited partnership ("Landlord") and TELEPORT COMMUNICATIONS GROUP INC., a 
Delaware corporation ("Tenant").

                               Background

          Pursuant to a lease dated February 20, 1996 by and between Tenant 
and Landlord (the "Lease"), Tenant leased from Landlord certain space in the 
buildings known as Building 2 and the UPS Building, located in the Princeton 
Technology Center, South Brunswick Township, Middlesex County, New Jersey 
(the "Premises").

          Under the terms of the Lease, Landlord and Tenant each assumed 
responsibility for the construction of certain improvements to the Premises 
required before Tenant could take occupancy.  The improvements were expected 
to be completed by June 30, 1996.  Accordingly, the Lease was scheduled to 
commence on July 1, 1996.  For reasons not the fault of either party, the 
improvements were not substantially completed until August 31, 1996.  The 
Tenant was, therefore, unable to occupy the Premises until September 1, 1996.

          Landlord and Tenant now desire to modify the Lease to reflect these 
facts.

          NOW, THEREFORE, in consideration of the mutual covenants contained 
in this Amendment and intending to be legally bound hereby, Landlord and 
Tenant agree as follows:

          1.   In Section 2 of the Lease, the term "July 1, 1996" is hereby 
deleted and the following is substituted in lieu thereof: "September 1, 1996".

          2.   Except as expressly set forth herein, all terms and conditions 
of the Lease shall remain in full force and effect and are incorporated 
herein by reference.  The parties ratify and confirm the Lease as amended by 
this Amendment.  This Amendment shall be binding upon and inure to the 
benefit of the parties hereto and their successors and assigns.



          3.   This Amendment may be executed in counterpart with the same 
effect as if the signatures thereto and hereto were taken upon the same 
instrument, but all of such counterparts taken together shall be deemed to 
constitute one and the same instrument.

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment 
to Lease Agreement to be executed as of the day and year first above written.

                              LANDLORD:

                              SOUTH BRUNSWICK INVESTORS, L.P.,
                              a Delaware limited partnership

                                   By: South Brunswick Investment
                                   Company, L.L.C.

                                   By:__________________________

                                   Name:________________________

                                   Title:_______________________

                              TENANT:

                              TELEPORT COMMUNICATIONS GROUP INC.

                              By:_______________________________

                              Name:_____________________________

                              Title:____________________________