FindLaw - Cost Sharing and IRU Agreement - Level 3 Communications LLC and INTERNEXT LLC
                         COST SHARING AND IRU AGREEMENT


                                     between


                           LEVEL 3 COMMUNICATIONS, LLC


                                       and


                                 INTERNEXT, LLC










                               Dated July 18, 1998




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                         COST SHARING AND IRU AGREEMENT

     THIS COST SHARING AND IRU AGREEMENT  ("Agreement") is made and entered into
as of the 18th day of July, 1998, by and between LEVEL 3 COMMUNICATIONS,  LLC, a
Delaware limited  liability company  ("Grantor") and INTERNEXT,  LLC, a Delaware
limited liability a company ("Grantee").

                                    RECITALS

     A.  Grantor  intends to  construct  a  nationwide  multiconduit  (currently
estimated at eight 1 1/4" conduits,  taking into account this  Agreement)  fiber
optic communications system, including certain Opamp Facilities and Regeneration
Facilities (as such terms are defined  herein) as generally  depicted on Exhibit
"A-1"  attached  hereto and which will  connect the cities  described on Exhibit
"A-2" attached hereto (the "Grantor System").
     B.  Grantor  further  intends to install  within one of the conduits of the
Grantor System a high fiber count (currently estimated at 96 fibers, taking into
account this  Agreement)  fiber optic cable (as more fully  described in Exhibit
"H", the "Cable").
     C. Grantee  desires to own or to possess an  indefeasible  right to use and
control  a  network  consisting  of 24  conduit-protected  fibers  and one spare
conduit  connecting the cities  described on Exhibit "A-2" attached  hereto.  D.
Grantor and Grantee can complete their desired networks less expensively if such
networks are  constructed  as part of a single project than if each network were
constructed independently.  E. Grantor and Grantee therefore desire to share the
costs of  constructing  the Grantor  System,  and,  pursuant to such  sharing of
costs,  Grantor desires to grant to Grantee  ownership of and/or an indefeasible
right to use certain  facilities in the Grantor System,  all upon and subject to
the terms and conditions set forth below.





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                                   ARTICLE 1.
                                   DEFINITIONS

     1.01  "Acceptance  Date" shall mean the date when  Grantee  delivers (or is
deemed to have  delivered)  notice of  acceptance  of a  Completion  Notice with
respect to a Segment in accordance with Article 9.
     1.02 "Acceptance Testing" shall have the meaning set forth in Section 9.01.
     1.03 "Access Points" shall have the meaning set forth in Section 10.01.
     1.04 "Actual  Operating  Expenses"  shall mean,  without  duplication,  the
actual  out-of-pocket costs and expenses reasonably and necessarily  incurred by
Grantor in connection  with the operation of the Grantor  System,  as more fully
described in Exhibit "L" hereto.
     1.05  "Additional  Grantee  Fibers"  shall  have the  meaning  set forth in
Section 3.01.
     1.06  "Affiliate"  shall mean,  with respect to any specified  Person,  any
other Person that directly,  or indirectly  through one or more  intermediaries,
controls,  is controlled  by, or is under common  control with,  such  specified
Person. "Control" (including the terms "controlled by" and "under common control
with") means the possession,  directly or indirectly,  of the power to direct or
cause the direction of the management or policies of a Person,  whether  through
the  ownership  of voting  securities,  by  contract or credit  arrangement,  as
trustee or executor,  or otherwise,  provided that,  with respect to Grantor and
for the purpose of Sections  3.04(i),  6.04 and 7.02 only, the term "Affiliates"
shall not include the following  Persons if they would  otherwise be Affiliates:
(A)  Cable  Michigan,   Inc.,  RCN  Corporation   and   Commonwealth   Telephone
Enterprises,  Inc. (and any  intermediate  holding  companies or other  entities
formed solely for the purpose of owning stock in such  Persons),  unless Grantor
or its other  Affiliates  shall  acquire  more than fifty  percent of the voting
control of such Persons,  and (B)  California  Private  Transportation  Company,
L.P., to the extent California  Private  Transportation  Company,  L.P. has been
required to construct or install fibers or conduits  pursuant to the requirement
of any Governmental Authority.



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     1.07 "Associated  Property" shall mean the tangible and intangible property
needed for the use of the Grantee  Fibers and Grantee  Conduit as  permitted  by
this Agreement,  including the Regeneration Facilities and Opamp Facilities, but
excluding in any and all events any electronic and/or optronic  equipment.
     1.08  "Authorization"  shall  mean  any  consent,   registration,   filing,
agreement,  notarization,  certificate,  license, approval, permit, authority or
exemption from, by or with any Governmental Authority or other Person.
     1.09  "Canadian  Person"  shall mean any Person  which is  permitted  under
applicable   Canadian    telecommunications   laws   to   own   or   operate   a
telecommunications system located in Canada.
     1.10 "CBD" shall mean the commonly referred to central business district of
a city.
     1.11  "Commencement  Date" shall mean the date on which  Grantor  commences
construction of the Grantor  System,  provided that if Grantor has not commenced
such construction on or prior to December 31, 1998, then the "Commencement Date"
shall mean December 31, 1998.
     1.12  "Commencement  Contribution"  shall  have the  meaning  set  forth in
Section 4.01.
     1.13  "Completion  Date" shall mean (i) in the case of all Segments  within
Phase One and Phase Two, the (***) anniversary of the Commencement Date and (ii)
in the case of all  Segments  within  Phase  Three,  the earlier to occur of (a)
(***) months from the date that Grantor  commences  construction  of Phase Three
and (b) the (***) anniversary of the Commencement  Date, subject in each case to
any Force Majeure Event or Grantee Delay Event.
     1.14 "Completion  Contribution" shall have the meaning set forth in Section
4.01.
     1.15 "Completion Notice" shall have the meaning set forth in Section 9.02.
     1.16 "Costs" shall mean actual,  direct costs paid or payable in accordance
with the established  accounting  procedures generally used by Grantor and which
it utilizes in billing third parties for reimbursable projects which costs shall
be limited to the  following:  (i)  internal  labor costs,  including  wages and
salaries, and benefits and


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overhead  (provided  that the costs of such  benefits and overhead do not exceed
thirty percent (30%) of such wages and salary),  and (ii) other direct costs and
out-of-pocket  expenses on a  pass-through  basis (e.g.,  equipment,  materials,
supplies, contract services, etc.).
     1.17 "Dark Fiber" shall have the meaning set forth in Section 15.03.
     1.18 "Designated Party" shall mean (i) Eagle River, Inc.,  Teledesic Corp.,
Nextel Communications, Inc., (***).
     1.19 "Dispute Notice" shall have the meaning set forth in Article 24.
     1.20 "Effective Date" shall have the meaning set forth in Section 5.01.
     1.21 "Execution  Contribution"  shall have the meaning set forth in Section
4.01.
     1.22 "Final Contribution" shall have the meaning set forth in Section 4.01.
     1.23 "Force Majeure Event" shall have the meaning set forth in Article 19.
     1.24  "Governmental  Authority"  shall mean any federal,  state,  regional,
county,  city,  municipal,  local,  territorial  or tribal  government,  whether
foreign or domestic,  or any department,  agency, bureau or other administrative
or regulatory  body obtaining  authority  from any of the foregoing,  including,
without limitation, courts, public utilities and sewer authorities.
     1.25 "Grantee Conduit" shall have the meaning set forth in Section 3.01.
     1.26  "Grantee  Delay  Event"  shall mean the  failure of Grantee to timely
observe and perform its  obligations  and  agreements  hereunder,  which failure
delays the  construction  and installation of the Grantor System with respect to
one or more segments.
     1.27 "Grantee Fibers" shall have the meaning set forth in Section 3.01.



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     1.28 "Grantor System" shall have the meaning set forth in the Recitals.
     1.29  "Grantor  Termination  Point"  shall  have the  meaning  set forth in
Section 2.02.
     1.30  "Hotel"  shall  mean a  building  in  which  points  of  presence  of
interexchange carriers are found.
     1.31  "Impositions"  shall mean all taxes,  fees,  levies,  imposed  duties
charges  or  withholdings  of any nature  (including  without  limitation  gross
receipts,  taxes and  franchise,  license and permit  fees),  together  with any
penalties,   fines  or  interest   thereon  arising  out  of  the   transactions
contemplated by this Agreement  and/or imposed upon the Grantor  System,  or any
part thereof, by any Governmental Authority.
     1.32  "Incremental  Costs" shall mean,  with  respect to Sections  7.02 and
7.06, the Costs of  construction  and  installation  of the  Additional  Grantee
Fibers but shall not include the cost of constructing and installing the conduit
in which such fibers are installed,  the cost of constructing and installing the
Initial Grantee Fibers or any other costs associated with the Grantor System.
     1.33 "Initial  Grantee  Fibers" shall have the meaning set forth in Section
3.01.
     1.34 "IRU" shall have the meaning set forth in Section 3.01.
     1.35 "IRU Contribution" shall have the meaning set forth in Section 4.01.
     1.36  "Lien"  shall  mean  any  mortgage,  pledge,  hypothecation,   claim,
assessment,  security interest, lease, sublease, license, lien, conditional sale
contract,  title retention  contract,  adverse or infringing  claim or interest,
easement,  encroachment,  voting trust agreement, option, charge, right of first
refusal or other  encumbrance or restriction of any kind, or rights of others or
other contract to give any of the foregoing,  excluding any of the foregoing (i)
in favor of the grantor of any  Required  Right,  or granted by the grantor of a
Required Right  independent of the  transactions  contemplated  by such Required
Right, (ii) arising under or resulting from the terms and provisions of, and the
execution by,  Grantor of the instrument  evidencing  such Required  Right,  and
(iii) which are customary for agreements of that type.
     1.37 "Major Cities" shall mean the cities designated as Major Cities listed
on Exhibit A-2.
     1.38 "Minimum Period" shall mean, with respect to each Segment, a period of
(***) years from the Acceptance Date for such Segment.




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     1.39  "Node  Site"  shall mean the  facilities  (other  than  long-distance
backbone  Regeneration  Facilities and Opamp  Facilities)  which  accommodate or
house  switch  equipment,  fiber optic  transmission  and  associated  ancillary
equipment to serve as a switch terminal,  transport concentrator,  hub terminal,
junction or end user pop location.
     1.40 "Operating Expense Charge" shall have the meaning set forth in Section
13.02.
     1.41  "Operating  Expense  Estimate"  shall have the  meaning  set forth in
Section 13.05.
     1.42 "Opamp  Facilities"  shall mean  facilities  to optically  amplify lit
fibers as more particularly described on Exhibit "I".
     1.43 "Option Right" shall have the meaning set forth in Section 6.01.
     1.44  "Person"  shall mean any natural  person,  corporation,  partnership,
limited liability company, business trust, joint venture,  association,  company
or government, or any agency or political subdivision thereof.
     1.45 "Phase" shall mean Phase One, Phase Two or Phase Three.
     1.46 "Phase One" shall have the meaning set forth in Section 2.04.
     1.47 "Phase Two" shall have the meaning set forth in Section 2.04.
     1.48 "Phase Three" shall have the meaning set forth in Section 2.04.
     1.49 "Pinch Event" shall have the meaning set forth in Section 7.02.
     1.50 "Proprietary  Information" shall have the meaning set forth in Section
23.01.
     1.51  "Recurring  Charges"  shall  mean the ROW  Charge  and the  Operating
Expense Charge.
     1.52  "Regeneration  Facilities"  shall mean  facilities to regenerate  the
signal of lit fibers as more particularly described on Exhibit "I".
     1.53 "Required Rights" shall have the meaning set forth in Section 6.01.
     1.54  "Required  Right  Payment"  shall mean any payment  which  Grantor is
required to make to the grantor or provider of a Required  Right pursuant to the
terms of the instrument governing such Required Right.



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     1.55 "Route Miles" shall mean, for each Segment, the actual number of route
miles for such Segment as  constructed,  provided  that,  if the Grantor  System
follows more than one route for all or any portion of a Segment, only the actual
route  miles  for the route  containing  the  Initial  Grantee  Fibers  shall be
included.
     1.56 "ROW Charge" shall have the meaning set forth in Section 13.02.
     1.57 "RRG" shall have the meaning set forth in Section 2.02.
     1.58 "Segments" shall have the meaning set forth in Section 2.01.
     1.59 "Segment End Points" shall have the meaning set forth in Section 2.01,
as the same may be extended and terminated pursuant to Section 2.02.
     1.60 "System Route" shall have the meaning set forth in Section 2.01.
     1.61 "Term" shall have the meaning set forth in Section 5.01.

                                   ARTICLE 2.
                                  SYSTEM ROUTE

     2.01  Grantor  shall  cause the  Grantor  System to connect  the city pairs
identified on Exhibit "B" attached  hereto (each city  identified on Exhibit "B"
is herein called a "Segment End Point", the route between the applicable Segment
End Points is herein  called a "Segment",  and all of the Segments  together are
herein called the "System Route").
     2.02 In the case of the Major  Cities,  Grantor  shall  cause  the  Grantor
System,  or at a minimum the portion  thereof in which Grantee shall receive the
IRU, to extend to (***) the serving  manholes or access points located  adjacent
to the building  containing  Grantee's Node Site as specified by Grantee in each
such Major City, in accordance with Exhibit "M" attached  hereto,  provided that
Grantee shall obtain all necessary  permits or waivers for such  extension  from
the owner of such  building  and/or the owner of the real property on which such
building is located,  and provided  further that all  end-point  locations  with
respect to the Major Cities will have diverse  routing from the main backbone of
the Grantor System. In the event that, for any Major City,  Exhibit "M" does not
contain  the  address  of the  building  in which  Grantee's  Node  Site will be
located,



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Grantee  shall  provide  Grantor with such  address,  which will be within (***)
miles of the center  point of the CBD, no later than (***)  months  prior to the
targeted  completion date for such Major City set forth in Exhibits "B", "D" and
"E", except that Grantee shall have a 30-day grace period in circumstances where
Grantee  has made  substantial  efforts to locate  real estate to house its Node
Site. For all Segment End Points which are not Major Cities, the Grantor System,
or at a minimum the portion  thereof in which  Grantee  shall have  received the
IRU,  shall connect to and  terminate at a splice point  contained in any of the
following,  in Grantor's sole  discretion:  (i) a Node Site of Grantee or one of
its Affiliates in the CBD of such city,  (ii) the primary or secondary Hotel for
such city, or (iii) a  Regeneration  Facility,  Opamp Facility or a Node Site of
Grantor or one of its Affiliates in such city (each such Regeneration  Facility,
Opamp  Facility  or Node Site of  Grantor or one of its  Affiliates,  a "Grantor
Termination Point"), provided that (A) such Grantor Termination Point is located
within (***) miles of the center point of such city's CBD and (B) Grantor  shall
return the Grantor System or such portion thereof in which Grantee shall receive
the IRU to a publicly  dedicated  street  adjacent to such  Grantor  Termination
Point,  provided that all end-point locations for cities other than Major Cities
will have diverse  routing from the main  backbone of the Grantor  System to the
extent  the  Grantor  System  provides  such  diverse  routing to Grantor or its
Affiliates. (***).




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The Grantor Termination Point in any Segment End Point shall be the same for all
Segments  ending at such Segment End Point.  2.03 The  specific  location of the
System  Route  between  Segment End Points is subject to Grantor  obtaining  the
Required Rights, provided that in any event Grantor shall cause the System Route
to connect the Segment End Points for each Segment.  The Grantor  System will be
constructed and installed in three phases (the "Phases"). The first Phase of the
Grantor  System ("Phase One"),  estimated at  approximately  11,411 route miles,
shall  include the  Segments  described  on Exhibit "C"; the second Phase of the
Grantor  System  ("Phase Two"),  estimated at  approximately  3,714 route miles,
shall include the Segments  described on Exhibit "D"; and the third Phase of the
Grantor  System ("Phase  Three"),  estimated at  approximately  910 route miles,
shall  include  the  Segments   described  on  Exhibit  "E"  provided  that  (i)
construction of each of (A) the Seattle to Vancouver  Segment in Phase Three and
(B) the aggregate of the Albany to Montreal,  Montreal to Toronto and Toronto to
Buffalo  Segments in Phase Three,  shall be optional in the sole  discretion  of
Grantor,  and (ii) in the event  Grantor  elects to not construct the Seattle to
Vancouver  Segment,  the Final Contribution shall be reduced by the sum of (***)
and Grantee will not be required to pay the Completion Contribution set forth in
Exhibit "F" for the Seattle to Vancouver Segment, and (iii) in the event Grantor
elects not to construct the Albany to Montreal,  Montreal to Toronto and Toronto
to Buffalo Segments in Phase Three, (A) the Final  Contribution shall be reduced
by the sum of  (***),  and (B) an Albany to  Buffalo  Segment  shall be added to
Phase One with a Completion Contribution equal to the aggregate amount set forth
in Exhibit  "F" for the Albany to  Montreal,  Montreal to Toronto and Toronto to
Buffalo  Segments  less the sum of (***).  Grantor  shall  provide  Grantee with
written notice of the  commencement  of construction of each Phase promptly upon
commencement thereof and of any determination not to construct Phase Three. 2.05
Notwithstanding anything to the contrary contained herein, Grantor may elect, at
its option,  to acquire any  portions of the Grantor  System from third  parties
(whether under a lease,  sublease,  indefeasible  right of use, or otherwise) in
lieu of constructing and installing the Grantor System respecting such portions;
(***).



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                                   ARTICLE 3.
                                  GRANT OF IRU

     3.01 Subject to the terms of Article 7 below,  as of the Effective Date for
each Segment delivered by Grantor to Grantee hereunder, Grantor hereby grants to
Grantee,  and Grantee  hereby  acquires from Grantor for the purposes  described
herein (i) an exclusive  indefeasible  right of use in (or, if and to the extent
provided in Section 3.02 hereof,  ownership  of),  twenty-four  (24) fibers (the
"Initial  Grantee  Fibers") plus (a) to the extent Grantee  exercises its option
pursuant  to Section  7.06,  the fibers  acquired  by Grantee  pursuant  to such
option,  (b) the fibers in excess of 24 delivered to Grantee pursuant to Section
7.02 and (c) fibers  installed in the Grantee  Conduit (the fibers  described in
clauses  (a),  (b) and (c) are herein  referred  to as the  "Additional  Grantee
Fibers"),  in each  case to be  specifically  identified  in the Cable or cables
between the Segment End Points for such Segment (the  "Initial  Grantee  Fibers"
and the  "Additional  Grantee  Fibers",  together  with  all  substitutions  and
replacements  thereof, are herein referred to as the "Grantee Fibers"),  (ii) an
exclusive  indefeasible  right of use in (or,  if and to the extent  provided in
Section  3.02  hereof,  ownership  of) one  specifically  identified  unoccupied
conduit in the Grantor System between the Segment End Points for


 
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each Segment (the "Grantee Conduit"),  and (iii) an associated and non-exclusive
indefeasible  right  of use in the  Associated  Property  with  respect  to such
Segment,  all upon and  subject  to the terms and  conditions  set forth  herein
(collectively the "IRU").
     3.02 Notwithstanding  anything contained herein to the contrary: (a) if and
to the extent not prohibited by the Required  Right(s)for a particular  Segment,
and (b) if the  Required  Right(s)  with respect to such Segment do not and will
not  impose  upon  Grantor  any  additional  fees,  costs or charges as a result
thereof (unless Grantee shall pay the same or make  arangements  satisfactory to
Grantor to assure such payment),  Grantor shall, upon the request of Grantee and
on a  Segment-by-Segment  basis on the  Acceptance  Date  with  respect  to such
Segment and without the need for any further action or execution of documents by
Grantor to Grantee:  (i)  transfer  title to the Grantee  Fibers and the Grantee
Conduit to Grantee  free and clear of all Liens  attributable  to  Grantor; 
(ii)grant to Grantee a lease,  subeasement or similar agreement providing 
rights (at no additional cost to or monetary  obligations of Grantee, except to
the extent provided in clause (b) above) to Grantee  substantially identical to
the rights held by Grantor under the relevant Required  Right(s) (a 
"Sublease");  and (iii) continue  the  grant  of the IRU in the  Associated  
Property.  Nothing  in this Section 3.02 or in any such  Sublease  shall  
relieve  Grantor or Grantee of its rights, duties and obligations set forth 
in this Agreement or diminish,  enlarge or otherwise  affect such rights,  
     duties and obligations  (except that, to the extent  applicable  under this
Section 3.02,  Grantee's  property interest will consist of title in the Grantee
Fibers and the Grantee  Conduit and a grant of a Sublease)  and if any  Sublease
shall  terminate or Grantee  shall be  otherwise  subsequently  prohibited  from
owning  title to the  Grantee  Fibers and the  Grantee  Conduit,  Grantor  shall
maintain the Required Rights in accordance with and pursuant to Article 6, title
to such Grantee  fibers and Grantee  Conduit  shall revert and be  reconveyed to
Grantor and  Grantee  shall have and retain the IRU in such  Grantee  Fibers and
Grantee Conduit under and subject to the terms and conditions of this Agreement.

3.03 Except to the extent not permitted by any Required Right, Grantor
hereby grants to Grantee a security interest and lien in all of Grantor's right,
title and interest in


 
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the Grantee Fibers and the Grantee Conduit,  whether now or hereafter  acquired,
in order to secure  performance  of  Grantor's  obligations  to  Grantee in this
Agreement.
     3.04  Grantor  shall use  commercially  reasonable  best  efforts  to cause
construction  and  Acceptance  Testing  for  all  Segments  to  be  successfully
completed  no later than (***) (or in the case of Phase  Three,  the  earlier of
(***) and (***) months after the  commencement of construction  thereof) and, if
not so completed by such date, then as soon as practicable  thereafter.  Grantor
acknowledges  that time is of the essence in this  Agreement and that Grantee is
relying on delivery of all  Segments by such date.  In light of the fact that it
would be  impossible  to  calculate  the  reduction in the value of the IRU that
Grantee bargained for in the event that  construction or Acceptance  Testing for
any Segment is not  completed by such date,  or if Grantor  fails to deliver any
Segment  altogether,  Grantor and Grantee hereby agree to the following payments
and/or reductions (which constitute adjustments to the IRU Contribution),  which
except as otherwise  specifically  provided for in paragraph (i) below, shall be
the sole remedy of Grantee in the event of the late delivery or  non-delivery of
any Segment:
     (a) At any time that Grantor  determines,  in its best  judgment,  that the
Acceptance  Date for any Segment will be delayed past (***), it shall deliver to
Grantee a notice in  writing  (a "Delay  Notice"),  specifying  the  Segment  or
Segments affected, stating that the Acceptance Date(s) for such Segments will be
delayed  past (***),  and  setting  forth a new firm  delivery  date(s) for such
Segments.  Grantor may not deliver more than two Delay Notices in respect of any
segment, and may only deliver a second Delay Notice in respect of any Segment if
the  second  Delay  Notice  sets forth an earlier  firm  delivery  date for such
Segment Date.  Such firm  delivery  date, as it may be revised in a second Delay
Notice,  is  hereinafter  referred to as the  "Revised  Delivery  Date" for such
Segment.
     (b) If Grantor delivers to Grantee a Delay Notice for any Segment, then the
following provisions shall apply: (i) Grantee may terminate this Agreement as to
such  Segment  at any time on or prior to (x) the date which is the later of (A)
ninety (90) days following the date of delivery of such Delay Notice and (B) six
(6) months prior to the Revised Delivery Date



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for such Segment or (y) the Acceptance Date with respect to such Segment, if the
Acceptance  Date for such  Segment  does  not  occur on or prior to its  Revised
Delivery Date. Upon any such termination pursuant to this paragraph (b), Grantor
shall pay Grantee,  in respect of the  non-delivery  of such Segment,  an amount
equal to the Total  Contribution  for such  Segment  multiplied,  in the case of
termination pursuant to clause (x) above, by the First Adjustment Factor, and in
the case of termination  pursuant to clause (y) above, by the Second  Adjustment
Factor.
                  (ii) If Grantee does not terminate  this  Agreement as to such
Segment,  the  Completion  Contribution  for such Segment shall be reduced by an
amount  equal  to  the  sum of (x)  the  Total  Contribution  for  such  Segment
multiplied  by the sum of (A) either (1) if the Revised  Delivery  Date for such
Segment  is on or prior to (***)  multiplied  by the  number of whole or partial
months occurring during the period from and including (***) and to and including
the month in which the  Revised  Delivery  Date  occurs,  or (2) if the  Revised
Delivery Date for such Segment is on or after (***), the sum of (***) multiplied
by the number of whole or partial  months  occurring  during the period from and
including  (***) and to and  including  the month in which the Revised  Delivery
Date  occurs  plus (***),  plus (B) (***)  multiplied  by the number of whole or
partial  months during the period from and  including the Revised  Delivery Date
and to and including the month in which the Acceptance Date occurs, plus (C) the
Additional Percentage, if any, based on the date of delivery of the Delay Notice
as to such Segment,  plus (y) the Second Notice Amount,  if any,  arising out of
the delivery of a second Delay Notice as to such  Segment.  Grantee shall notify
Grantor of the Second  Notice  Amount at the time of payment of such  Completion
Contribution.
     (c) If Grantor fails to deliver a Delay Notice as to any Segment,  then the
following  provisions  shall apply:  (i) If the Acceptance Date for such Segment
occurs after (***),  and on or prior to (***),  the Completion  Contribution for
such Segment shall be reduced by an amount equal to the Total  Contribution  for
such Segment  multiplied  by (***)  multiplied by the number of whole or partial
months occurring during


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the period from and including (***) and to and including the month in which such
Acceptance Date occurs.
                   (ii) If the Acceptance Date for such Segment has not occurred
on or prior to (***),  Grantee may terminate this Agreement with respect to such
Segment at any time on or prior to such  Acceptance  Date, in which case Grantor
shall pay Grantee,  in respect of the  non-delivery  of such Segment,  an amount
equal to the Total  Contribution  for such Segment  multiplied by (x) if Grantee
has sent Grantor a Reminder  with respect to such Segment at least 10 days prior
to the date of such termination,  (***) or (y) if Grantee has not sent Grantor a
Reminder with respect to such Segment at least 10 days prior to the date of such
termination,  the  amount  that  would  have been  payable  in  respect  of such
termination  under  paragraph  (b)(i)(x)  above as if  Grantor  had sent a Delay
Notice  on (***)  specifying  a  Revised  Delivery  Date the same as the date of
termination.
                  (iii) If the Acceptance Date for such Segment has not occurred
on or prior to (***),  and if Grantee does not  terminate  this  Agreement as to
such Segment,  the Completion  Contribution for such Segment shall be reduced by
an amount equal to the Total  Contribution for such Segment multiplied by (x) if
Grantee has sent  Grantor a Reminder  with  respect to such  Segment at least 10
days prior to the Acceptance  Date, (***) or (y) if Grantee has not sent Grantor
a Reminder with respect to such Segment at least 10 days prior to the Acceptance
Date, the amount of such reduction that would have been applicable in respect of
such Completion  Contribution under paragraph (b) above as if Grantor had sent a
Delay  Notice  on  (***)  specifying  a  Revised  Delivery  Date the same as the
Acceptance Date.
     (d) In the event the  Acceptance  Date for a Segment  has not  occurred  by
(***) and Grantee has not terminated  this Agreement as to such Segment prior to
such date,  this  Agreement  shall be deemed  terminated  as to such  Segment on
(***), in which case Grantor shall pay Grantee,  in respect of the  non-delivery
of such  Segment,  an amount  equal to the Total  Contribution  for such Segment
multiplied by (***).


                                       14
<PAGE>



     (e)  Grantor  shall pay  Grantee  any  amounts  required  by the  foregoing
paragraphs  to be  paid  within  thirty  (30)  days  after  termination  of this
Agreement  as to any  Segment.  Any sums not paid by Grantor when due shall bear
interest at the rate of eighteen percent (18%) per annum. Grantee shall have the
right to set off  against  any other  amounts  payable  to  Grantor  under  this
Agreement  the amount of any payment due Grantee  pursuant to this Section 3.04.
All payments by Grantor  pursuant to this Section 3.04,  and all  adjustments to
the  Completion  Contributions  payable  by Grantee  on the  Acceptance  Date of
Segments, shall be treated by both Grantor and Grantee as adjustments to the IRU
Contribution payable hereunder.  Grantor and Grantee shall file (and shall cause
their respective  parents to file) their respective income tax returns and other
returns and reports for their respective businesses on such basis and, except as
otherwise required by law, not take any positions inconsistent therewith.
     (f) In the  event  that  Grantor  breaches  its  obligations  in the  first
sentence of this  Section  3.04 as to any Segment,  Grantee may  terminate  this
Agreement  as to such  Segment.  Upon  any  such  termination  pursuant  to this
paragraph (f), Grantor shall pay Grantee, in respect of the non-delivery of such
Segment,  an amount equal to the Total  Contribution for such Segment multiplied
by (***).
     (g) As used in this  Section  3.04,  the  following  terms  shall  have the
meanings set forth below:
                  (i)  "Additional   Percentage"   shall  be  (***)  and  (***),
respectively,  with  respect to any Segment if the Delay Notice for such Segment
is delivered on or before (***) and at any time on or after (***), respectively.
                  (ii) "First Adjustment Factor" shall equal, as to any Segment,
(w) (***) multiplied by the number of whole or partial months in the period from
and including (***) and to and including the month in which the Revised Delivery
Date occurs,  if the Revised  Delivery Date is on or before (***), (x) (***), if
the  Revised  Delivery  Date is on or after  (***) and on or before  (***),  (y)
(***), if the Revised Delivery Date is on or after (***) and on or before (***),



 
                                       15
<PAGE>



or (z) (***),  if the Revised  Delivery Date is on or after (***),  in each case
plus the  Additional  Percentage,  if any,  based on the date of delivery of the
Delay Notice.
                  (iii)  "Reminder" shall mean a written notice sent on or after
(***) by Grantee to Grantor  reminding Grantor of Grantee's  termination  rights
under  paragraph  (d) of this  Section 3.04 as to any Segments not for which the
Acceptance  Date has not occurred and Grantor has not prior thereto  delivered a
Delay Notice.
                  (iv)  "  Second  Adjustment  Factor"  shall  equal,  as to any
Segment,  (x) (***) plus (y) (***)  multiplied by the number of whole or partial
months in the period from and including  (***) and to and including the month in
which Grantee  notifies  Grantor in writing of the termination of this Agreement
as to such Segment.
                  (v)  "Second  Notice  Amount"  shall  mean,  as to any Segment
regarding which Grantor has delivered a second Delay Notice,  an amount,  not to
exceed the product of (***)  multiplied by the number of whole or partial months
occurring  during the period from and  including  the  Acceptance  Date for such
Segment and to and  including  the month in which the Revised  Delivery Date set
forth in the original  Delay Notice  occurs,  determined by Grantee,  absent bad
faith,  to  be  necessary  to  compensate  it  for  costs   incurred,   business
opportunities  foregone  or damages  otherwise  suffered  based upon the initial
notification of the Revised Delivery Date which are not fully compensated for by
the earlier delivery of such Segment.
                  (vi) "Total  Contribution"  for any Segment shall be deemed to
equal,  for purposes of  convenience in this Section 3.04 only, and for no other
purposes  whatsoever,  an amount equal to 70/60.375 multiplied by the Completion
Contribution  due upon the  Acceptance  Date for such  Segment  as set  forth in
Exhibit "F".
     (h) Under circumstances where more than one of the foregoing paragraphs may
apply to the termination of this Agreement as to any Segment,  Grantee shall not
be entitled to payment under more than one of the such  paragraphs.  Each of the
foregoing  paragraphs  shall be limited by the provision  that in no event shall
the payments in respect of the non-delivery of any Segment, or the reductions in
the amount of the Completion Contribution with respect to any Segment,  required
under  this  Section  3.04  exceed  (***)  of the  Total  Contribution  for such
Segments.



 
                                       16
<PAGE>




     (i) (i) (***).
     (ii)  If  Grantee  accepts  such  offer,   the  amount  of  the  Completion
Contribution  and/or Recurring Charges payable with respect to such Segment upon
acceptance of such fibers  and/or  conduit shall be reduced by an amount (not to
exceed  (***) of  70/60.375  of the  Completion  Contribution),  as Grantor  and
Grantee shall agree,  in good faith,  to reflect the reduced value of the fibers
and/or conduit accepted as compared to what Grantee had bargained for hereunder,
taking into account,  if this  Agreement has been  terminated as to such Segment
prior to the  acceptance of such offer by Grantee,  any amounts  already paid by
Grantor in respect  of the  non-delivery  of such  Segment.  The  amounts of the
Execution Contribution,  Commencement  Contribution and Final Contribution shall
also all be reduced by an amount  equal to, in each case,  the  original  amount
thereof   multiplied   by  the  products  of  17.5/700,   8.75/700  and  70/700,
respectively,   multiplied  by  the  percentage   reduction  in  the  Completion
Contribution  for such Segment.  If Grantor and Grantee shall be unable to agree
upon the  appropriate  reductions in the Completion  Contribution  and Recurring
Charges payable hereunder within the thirty (30) day period following acceptance
by  Grantee of such  offer,  the amount of the  reductions  shall be  determined
through an arbitration procedure in accordance with Section 24.01(iv).




                                       17
<PAGE>




                  (iii) If Grantee rejects such offer, the preceding  provisions
of this Section 3.04 shall  continue to apply as to such Segment,  provided that
this  paragraph  (i) shall  continue  to apply to other  fibers and or  conduits
constructed or acquired by Grantor or its Affiliates prior to (***).
                  (iv) If this  Agreement has been  terminated as to any Segment
prior to the time  that the  payments  and/or  reductions  provided  for in this
Section 3.04 no longer  constitute  the sole remedy of Grantee in respect of the
non-delivery  of such  Segment,  then even if Grantor has prior  thereto  made a
payment to Grantee in respect of the  non-delivery of such Segment,  Grantee may
nevertheless  bring an action for damages for the  non-delivery of such Segment,
in which case the amount of any damages  awarded  shall be reduced by the amount
previously paid by Grantor to Grantee.
     (j) The  determination  as to whether  the  delivery of any Segment is late
shall be made after taking into  consideration  the effect of any Grantee  Delay
Events or Force Majeure Events applicable to such Segment.
     (k) In the event that this  Agreement has been  terminated  with respect to
one or more Segments,  the amount of the Final  Contribution shall be reduced by
an amount equal to (x) the original Final  Contribution set forth on Exhibit "F"
multiplied by (y) a fraction, the number of which is the total of the amounts of
the Completion  Contributions  set forth on Exhibit "F" for all such  terminated
Segments  divided by the total  original  Completion  Contribution  set forth on
Exhibit "F" and Grantor  shall  reimburse  Grantee in an amount equal to (A) the
sum of the original  Execution  Contribution and  Commencement  Contribution set
forth on Exhibit  "F"  multiplied  by (B) the  fraction  set forth in clause (y)
above.

                                   ARTICLE 4.
                                  CONSIDERATION

     4.01 Grantee agrees to make  contributions  to Grantor for the construction
of the  Grantor  System as set  forth in  Exhibit  "F",  as such  amount  may be
adjusted as provided herein (the "IRU Contribution"). The IRU Contribution shall
consist of a contribution to



                                       18
<PAGE>



be made upon  execution of this  Agreement  (the  "Execution  Contribution"),  a
contribution  to be made upon  Grantor's  commencement  of  construction  of the
Grantor System (the "Commencement Contribution"), a contribution to be made with
respect to each Segment on the Acceptance Date for such Segment (the "Completion
Contribution")  and a  contribution  to be made  upon  final  completion  of the
Grantor System, excluding any Segments terminated by Grantee pursuant to Section
3.04 or otherwise undelivered by Grantor (the "Final Contribution"), all as more
particularly described in Exhibit "F".
     4.02 In addition to the IRU  Contribution,  Grantee  shall pay  directly or
reimburse  Grantor  for all  other  sums,  costs,  fees and  expenses  which are
expressly provided to be paid by Grantee under this Agreement, including without
limitation,  the  Recurring  Charges.  Except  as  expressly  set  forth in this
Agreement, Grantee shall have no obligation to pay any amounts in respect of the
IRU granted hereunder.
     4.03  Grantor  will  deliver to Grantee  invoices  for  payments of the IRU
Contribution  and all other sums,  costs,  fees and expenses  owed by Grantee to
Grantor  hereunder  and  Grantee  shall  pay  such  invoiced  amounts,  less any
reasonably  disputed  amounts,  within  thirty  (30) days after  receipt of such
invoice.  Grantee shall provide  Grantor with written  notice by the payment due
date  describing  in  reasonable  detail  the  basis for any  disputed  amounts;
provided that any disputed amounts resolved in favor of Grantor shall thereafter
be paid  promptly by Grantee.  Any sums not paid by Grantee  when due shall bear
interest at the rate of eighteen (18%) per annum, other than reasonably disputed
amounts,  which  shall bear  interest  at the rate of twelve  percent  (12%) per
annum. 
     4.04 Grantor agrees that it will not, for a period of (***) years after the
Acceptance Date of the last Segment delivered hereunder, sell, transfer or grant
rights of use or similar rights to use any  facilities,  in whole or in part, in
the Grantor System (other than to an Affiliate of Level 3  Communications,  Inc.
or an RRG) upon  economic or other  material  terms more  beneficial  than those
provided to Grantee  hereunder.  Prior to entering  into any  agreement or other
arrangement  with any other Person (other than such a subsidiary or such an RRG)
regarding the use or transfer of all or part of the Grantor System,  (i) Grantor
will provide Grantee with sufficient detail of the terms thereof (the



 
                                       19
<PAGE>



confidentiality  of which information shall be maintained by Grantee as provided
in  Article  23) in order to  enable  Grantee  to  compare  such  terms to those
provided to Grantee hereunder and (ii) at Grantee's option, this Agreement shall
be modified  to give  Grantee the  benefits of the more  beneficial  economic or
other material terms contained in such other  agreement or  arrangement.  In the
event that  Grantor and Grantee are unable to agree  whether such terms are more
beneficial or have been appropriately incorporated in this Agreement, if Grantee
so  requests,  the parties  shall submit such  disagreement  to  arbitration  in
accordance  with Section  24.01(iv).  The  provisions of this Section 4.04 shall
survive any  modification  of this  Agreement  pursuant to this Section  4.04. A
merger or  consolidation of Grantor or a sale by Grantor of all or substantially
all of its assets shall not be considered a sale, transfer or grant of rights to
use the Grantor System covered by this Section 4.04.

                                   ARTICLE 5.
                                      TERM

     5.01 The IRU with respect to each Segment shall become  effective  (and the
transfer  of  title to the  Grantee  Fibers  and the  Grantee  Conduit  for each
Segment,  if  applicable,  shall  occur)  on the  first  day  when  both (i) the
Acceptance  Date with  respect to the Segment has  occurred and (ii) Grantor has
received  payment of all of the IRU  Contribution  then due to Grantor  for such
Segment (as to such Segment, its "Effective Date"). Subject to the provisions of
Article 6 and Article 7, the IRU with respect to each Segment shall terminate at
the end of the  economically  useful life of both the Grantee Fibers and Grantee
Conduit  within  such  Segment,  as  determined  pursuant  to Section  5.03 (the
"Term").
     5.02 Notwithstanding  anything in this Agreement to the contrary,  the Term
with respect to each Segment shall not be less than the Minimum Period.  Grantor
shall take all such actions as may be necessary to cause each Required  Right to
remain in effect  so that the Term for each  Segment  shall be not less than the
Minimum Period  (including,  without  limitation,  exercising any renewal rights
under any Required Right, or otherwise



                                       20
<PAGE>



acquiring  at no cost to Grantee  such  extensions  or additions of any Required
Right and/or obtaining  replacements or substitutions of any Required Right (and
relocating such Segment or portions thereof at Grantor's sole cost under Section
6.05) as may be  necessary,  in order to cause  the term of each  such  Required
Right, or such replacement or substitution thereof, to be continued until a date
that is not earlier than the last day of the Minimum Period for such Segment).
     5.03 Grantee  shall  determine,  in its sole  discretion,  when the Grantee
Fibers and/or Grantee Conduit with respect to any Segment shall have reached the
end of their  economically  useful  life and shall give  written  notice of such
determination  to  Grantor.  Upon any such  determination  by Grantee  after the
Minimum Period, the Term shall expire with respect to such Grantee Fibers and/or
Grantee  Conduit  in such  Segment  and all  title to  and/or  rights to the use
thereof  shall  revert  to  Grantor  without  reimbursement  of any  of the  IRU
Contribution or other sums, costs, fees or expenses previously made with respect
thereto,  and from and after such time  Grantee  shall  have no further  rights,
obligations or liabilities hereunder or any other liability with respect thereto
unless such rights,  obligations or liabilities are specifically provided herein
to survive the Term.
     5.04 Absent a  determination  by Grantee  under Section 5.03, at the end of
the Term for each Segment,  at Grantee's option,  (i) Grantor shall transfer all
of Grantor's  right,  title and  interest to the Grantee  Fibers and the Grantee
Conduit  within  such  Segment  not then owned by  Grantee to Grantee  for $1.00
(except if Grantee has given  written  notice as to such  Segment  described  in
Section 5.03), in which case Grantee shall assume, and Grantor shall be relieved
of, all obligations in connection therewith,  or (ii) Grantee shall transfer all
of Grantee's  right,  title and  interest to the Grantee  Fibers and the Grantee
Conduit within such Segment not then owned by Grantor to Grantor for $1.00.
     5.05  Grantor  and  Grantee  acknowledge  and agree that  Grantee  shall be
treated for accounting and federal and all applicable  state tax purposes as the
exclusive  beneficial  owner of all Grantee Fibers and Grantee  Conduit (each of
which  constitutes  an interest in real  property)  with respect to which it has
received  an IRU  hereunder,  and as the holder of an  associated  non-exclusive
indefeasible  right  of use in the  Associated  Property  (which  constitutes  a
leasehold interest in real property). Grantor and Grantee further agree that



                                       21
<PAGE>



the transactions  contemplated in this Agreement constitute,  for accounting and
federal and  applicable  state tax purposes,  a joint  undertaking  to share and
minimize   the   expenses   of   constructing   of   each   party's   respective
telecommunications  network,  and not as a separate entity or as a sale or lease
(except with respect to lease of the Associated  Property).  Grantor and Grantee
shall file (and shall cause their  respective  Parents to file) their respective
income  tax  returns  and  other  returns  and  reports  for  their   respective
Impositions on such basis and, except as otherwise required by law, not take any
positions inconsistent therewith.
     5.06 This Agreement shall become  effective on the date hereof,  subject to
Section 20.04 hereof, and shall terminate on the date when, after completion and
delivery of the Segments all the Terms of all such  Segments  shall have expired
or  terminated,  except  that  Articles  16,  24 and  those  provisions  of this
Agreement which are expressly  provided herein to survive such termination shall
remain binding on the parties hereto. 
     5.07 If (i)  Grantee or an entity  which  directly or  indirectly  controls
Grantee (each a "Grantee Parent") makes a general  assignment for the benefit of
its  creditors,  files a voluntary  petition in  bankruptcy  or any  petition or
answer seeking,  consenting to, or acquiescing in  reorganization,  arrangement,
adjustment,  composition,  liquidation,  dissolution, or similar relief, (ii) an
involuntary  petition  in  bankruptcy  or other  insolvency  protection  against
Grantee or any  Grantee  Parent is filed and not  dismissed  within one  hundred
twenty (120) days,  (iii) Grantee or any Grantee Parent defaults with respect to
any  borrowed  money  indebtedness  of Grantee or such Grantee  Parent  having a
principal  amount in excess of (***),  which  indebtedness  is  already  due and
payable  in full or  which  default  has  resulted  in,  or  would  permit,  the
acceleration  of the maturity of such  indebtedness,  (iv) except as provided in
(v) below,  Grantee  materially  breaches this Agreement and such breach remains
uncured for 30 days (or, if not susceptible of cure within such period, cure has
not been  commenced and  diligently  pursued  thereafter)  after written  notice
thereof by Grantor,  (v) Grantee fails,  for a period of ten (10) days following
written  notice by  Grantor  of such  failure,  to make  payment in excess of an
aggregate  of (***) due  hereunder  (unless the unpaid sum is being  disputed in
good faith), or (vi) any Permitted  Guarantor shall materially breach Section 16
of its guaranty



                                       22
<PAGE>



referred  to in Section  20.06 and such  breach  shall  have a material  adverse
effect or such Permitted Guarantor's ability to perform under such Guaranty, and
such breach  remains  uncured (or Grantee  has not  substituted  a new  Guaranty
therefor) for 30 days (or, if not  susceptible of cure within such period,  cure
has not been commenced and diligently  pursued  thereafter) after written notice
thereof by Grantor,  Grantor may, upon twenty (20) days prior written  notice to
Grantee and while such event is  continuing,  terminate this Agreement as to all
Segments as to which Grantee has not yet paid the  Completion  Contribution,  in
which  case  Grantee  shall  have no  further  obligation  to make any  payments
hereunder as to the Segments terminated. In addition, upon the occurrence of any
event  described in clauses (iv) or (v) above, in addition to any other remedies
available to Grantor at law or in equity,  including  specific  performance  and
injunctive relief,  Grantor shall have no obligations under Article 12 hereunder
as to any  Segments as to which  Grantee has paid the  Completion  Contribution,
unless and until such  default is cured.  Except as provided in the  immediately
preceding sentence,  and  notwithstanding  other provisions in this Agreement to
the contrary,  Grantor  acknowledges and agrees that Grantor shall have no right
under any circumstances to terminate the IRU, in whole or in part, or any of the
rights and interests of Grantee hereunder, with respect to any Segment for which
the Completion  Contribution  relating thereto has been fully paid in accordance
with the terms hereof prior to the termination of the Term of such Segment. 5.08
If (i) Grantor or an entity which directly or indirectly  controls Grantor (each
a "Grantor Parent") makes a general assignment for the benefit of its creditors,
files a voluntary petition in bankruptcy or the filing by Grantor or any Grantor
Parent of any  petition or answer  seeking,  consenting  to, or  acquiescing  in
reorganization,  arrangement, adjustment, composition, liquidation, dissolution,
or  similar  relief,  (ii)  an  involuntary  petition  in  bankruptcy  or  other
insolvency  protection  against  Grantor or any Grantor  Parent is filed and not
dismissed  within one hundred  twenty (120) days,  (iii)  Grantor or any Grantor
Parent  defaults with respect to any borrowed money  indebtedness  of Grantor or
such  Grantor  Parent  having a  principal  amount in  excess  of  (***),  which
indebtedness  is already due and payable in full or which  default has  resulted
in, or would permit, the acceleration of the maturity of such indebtedness, (iv)
Grantor materially



 
                                       23
<PAGE>


breaches  this  Agreement  (except  breaches  covered by Section  3.04) and such
breach  remains  uncured 30 days (or,  if not  susceptible  of cure  within such
period,  cure has not been commenced and diligently  pursued  thereafter)  after
written notice thereof by Grantee,  or (v) Level 3 Communications,  Inc. (or any
successor  guarantor  thereunder)  shall  materially  breach  Section  16 of its
guaranty  referred  to in Section  20.05 and such  breach  shall have a material
adverse  effect on its ability to perform under such  guaranty,  and such breach
remains  uncured for 30 days (or, if not susceptible of cure within such period,
cure has not been commenced and  diligently  pursued  thereafter)  after written
notice  thereof by Grantee,  then,  after written  notice  thereof from Grantee,
Grantee may (i)  terminate  this  Agreement,  in whole or in part, in which case
Grantee shall have no further  obligation  to make any payments  hereunder as to
the  portion  terminated,  and (ii)  subject  to  Article  17,  pursue any legal
remedies it may have under  applicable  law or principles of equity  relating to
such default, including specific performance and injunctive relief.

                                   ARTICLE 6.
                                 REQUIRED RIGHTS

     6.01 Grantor covenants and agrees that, during the Term of each Segment, it
shall  obtain  and  maintain  in full force and  effect  all  rights,  licenses,
permits, authorizations, rights-of-way, easements and other agreements which are
necessary in order to permit Grantor to construct,  install,  keep installed and
maintain the Grantee  Fibers and Grantee  Conduit  comprising  such Segment,  to
grant the IRU and to provide  Grantee with all other rights and  privileges  (it
being  understood that Grantee's  option rights under Section 7.06, prior to the
exercise thereof, shall not be considered for this purpose) under this Agreement
(collectively,  the  "Required  Rights").  Grantor  shall  use its  commercially
reasonable best efforts to cause each such Required Right to provide (a) Grantee
with  notice of any  default  on the part of  Grantor  thereunder  and to permit
Grantee to cure,  on behalf of and at the expense of Grantor,  any such  default
and,  thereafter,  to continue the use of such Required Right in accordance with
Grantor's rights and interests  thereunder,  (b) subject to the last sentence of
this Section 6.01, option or


 
                                       24
<PAGE>


renewal  rights  ("Option  Rights")  permitting the stated term of each Required
Right to be  continued  until  the end of the  economically  useful  life of the
Grantee Fibers and Grantee Conduit located in the Segment to which such Required
Right relates or otherwise beyond the scheduled expiration date of such Required
Right and (c)  provide  Grantee  with  non-disturbance  agreements  (in form and
substance  reasonably  satisfactory to Grantee)  relating to the Grantee Fibers,
the Grantee Conduit,  the Associated  Property and Grantee's interest in, and/or
ownership  and use thereof.  Each Required  Right shall by its terms,  or by the
terms of an option or similar  renewal right  exercisable at the sole discretion
of Grantor,  remain in effect for the Minimum  Period for each  Segment  covered
thereby, (***), provided further that Grantor shall nevertheless remain bound by
the provisions of Section 5.02 with respect to such Required Rights.
     6.02 Grantor  further  covenants and agrees that during the Term of the IRU
with respect to each Segment:
     (a) Grantor  shall  observe and perform  each and every of its  obligations
under  each  Required  Right if the  failure  to observe  and  perform  any such
obligation or obligations  would permit the grantor or provider of such Required
Right to terminate such Required Right prior to its stated expiration date or to
increase the fees,  charges or assessments  due to such grantor or provider,  or
would otherwise  adversely  impair or affect Grantee's rights to use the Grantee
Fibers, the Grantee Conduit and the Associated Property hereunder;
     (b) in the event Grantor shall receive  notice from any grantor or provider
of a  Required  Right  that  Grantor  has  failed  to  observe  or  perform  its
obligations under such Required Right (unless Grantor is contesting the validity
of such claimed or alleged failure in good faith, provided such contest does not
adversely  impair or affect  Grantee's  rights  hereunder ), Grantor  shall give
written notice of such failure to Grantee  (promptly  following the date Grantor
shall have  received  notice of such  failure)  and  Grantee  may, at its option
(subject to the terms and provisions of the Required Right and



                                       25
<PAGE>



the ability of third parties to cure defaults of Grantor  thereunder),  (i) cure
or correct any such failure and (ii) pay any  subsequent  amounts due under such
Required  Right to the grantor or provider if such Required Right unless Grantee
shall have received written notice from Grantor that Grantor will pay timely all
such amounts;
     (c) in the event Grantor is in default of any of its obligations  under any
Required Right and Grantee cures such default pursuant to Section  6.02(b)(i) or
Grantee  exercises  its rights  pursuant to Section 6.02 (b)(ii) , Grantor shall
reimburse  Grantee promptly upon demand for any and all amounts  reasonably paid
by Grantee;
     (d)  Grantor  shall at its sole  reasonable  cost and  expense  defend  and
protect  Grantor's  rights in and  interests  under  each  Required  Right,  and
Grantee's  rights under this  Agreement  and  Grantee's  interest in the Grantee
Fibers, the Grantee Conduit, any Sublease and the Associated  Property,  against
all Liens attributable to Grantor;
     (e) Grantor shall not exercise any right or otherwise take any action under
a Required Right which is inconsistent with its obligations, or Grantee's rights
under this Agreement, nor shall Grantor fail to exercise any such rights if such
failure would be inconsistent with such obligations or rights or would otherwise
adversely affect  Grantee's  ownership of and/or  indefeasible  right to use the
Grantee Fibers, the Grantee Conduit and the Associated Property hereunder;
     (f) Grantor shall not take any action which would result in the termination
of a Required  Right prior to its scheduled  expiration  (including any extended
term pursuant to an exercised option); and
     (g) In the event that (i) the grantor or provider of a Required Right is in
default under such Required Right, (ii) such grantor or provider makes a general
assignment  for the  benefit of its  creditors,  files a  voluntary  petition in
bankruptcy or any petition or consider seeking, consenting to, or acquiescing in
reorganization,  arrangement, adjustment, composition,  liquidation, dissolution
or  similar  relief,  (iii)  an  involuntary  petition  in  bankruptcy  or other
insolvency  protection  against  such  grantor or  provider is filed or (iv) any
other event or condition arises which may materially  adversely affect Grantor's
rights under such Required Right or Grantee's rights under this Agreement,  then
Grantor shall provide Grantee with prompt written notice of each such event or



                                       26
<PAGE>



condition and keep Grantee  reasonably  informed with respect to any  subsequent
developments relating thereto.
     6.03 In the event any Required Right shall contain,  or shall  otherwise be
subject to, an Option  Right in favor of Grantor  with respect to any portion of
the Grantor  System,  Grantor shall give Grantee written notice thereof at least
90 days prior to the last date  required  for  exercise  thereof  and either (i)
exercise such Option Right  (provided  that (a) Grantor shall not be required to
expend,  as  consideration  for exercising any such Option Right,  more than the
fair market rate  payable at such time for similar  rights and terms,  except to
the extent that Grantee and the other users of the Grantor System agree at their
option to pay directly or reimburse  Grantor for any amounts required to be paid
in excess of such fair market rate, and (b) any such extension  shall not modify
the rights or obligations of Grantor or Grantee under this Agreement (including,
without  limitation,  the amount of fees payable by Grantee  pursuant to Article
13)) or (ii) if Grantor  elects not to exercise  such  Option  Right and Grantee
wishes to  exercise  such  Option  Right and  continue to use the portion of the
Grantor  System to which such Option Right  relates,  then Grantor  shall (a) if
such Option Right and the Required Right relating thereto are assignable, assign
its  interest  therein  and in such  portion of the Grantor  System  (including,
without  limitation,  all facilities and rights therein) to Grantee for $1.00 or
(b) if  such  Option  Right  or the  Required  Right  relating  thereto  are not
assignable,  exercise  such Option  Right on behalf of Grantee  pursuant to this
Section 6.03, whereupon Grantor shall have no further right, title,  interest or
obligation  (and  Grantee  shall  have  all  such  right,  title,  interest  and
obligation)  under this Agreement to or with respect to such affected portion of
the Grantor System during the period of extension or renewal,  provided,  and on
the condition,  that Grantee shall assume and agree to pay,  observe and perform
all of the duties,  obligations  and  liabilities  associated with such Required
Right  relating  to  such  affected  portion  arising  after  the  date  of such
assumption  and shall  indemnify  Grantor  in  accordance  with  Article 16 with
respect to any Losses  suffered by Grantor  relating to the duties,  obligations
and liabilities assumed by Grantee pursuant to this sentence.



                                       27
<PAGE>




     6.04 Subject to Grantor's  compliance  with Sections  6.01,  6.02 and 6.03,
then notwithstanding any other provision of this Agreement to the contrary, if a
Required  Right  expires or otherwise  terminates  at any time after the Minimum
Period,  the Term (with  respect to the Segment or Segments or portions  thereof
affected  thereby) shall likewise  automatically  expire;  provided that, in the
event Grantor or any of its Affiliates  shall extend,  renew or enter into a new
agreement  with respect to such  Required  Right,  the Term shall  continue with
respect to such  Segment or Segments or portions  thereof  until the  subsequent
expiration or termination of such Required Right; provided further that any such
extension,  renewal or new agreement  shall not modify the rights or obligations
of Grantor or Grantee under this Agreement (including,  without limitation,  the
amount of fees payable by Grantee  pursuant to Article  13).  
     6.05 If, after the  Acceptance  Date with respect to a Segment,  Grantor is
required  by any  Governmental  Authority,  or by any  grantor or  provider of a
Required  Right prior to the scheduled  expiration of such  Required  Right,  to
surrender,  cease using or relocate such Segment or portion  thereof,  including
any of the  facilities  used or required in  providing  the IRU,  Grantor  shall
relocate  such  Segment of  portion  thereof  and shall have the right,  in good
faith, to reasonably  determine the extent and timing of, and methods to be used
for such  relocation;  provided that (i) Grantee shall be kept fully informed of
all actions to be taken and  determinations  made by Grantor in connection  with
such relocation, (ii) any such relocated Segment or portion thereof shall (a) be
constructed  in accordance  with the  construction  specifications  set forth in
Exhibits   "G"  and  "J"  and   incorporate   fiber  and  conduit   meeting  the
specifications set forth in Exhibit "H" (b) be subject to successful  completion
of  Acceptance  Testing  (which shall be  completed,  if  practicable,  prior to
termination  of service on the affected  portion of the Grantor  System) and (c)
contain  the same  number of Grantee  Fibers as the  Segment or portion  thereof
being relocated and, if the Segment or portion thereof being relocated  contains
the Grantee Conduit, any such relocated Segment or portion thereof shall contain
the Grantee Conduit and (iii) Grantor shall use its commercially reasonable best
efforts to minimize any disruption  resulting from such  relocation to Grantee's
telecommunication  operations. Unless such relocation is the result of a failure
by Grantor to observe and



 
                                       28
<PAGE>



perform its  obligations  under any  Required  Rights or this  Agreement  (e.g.,
failure to obtain a Required  Right with a scheduled  term at least equal to the
Minimum  Period or failure to comply with the terms thereof in order to maintain
such Required Right in effect for the Minimum  Period),  Grantee shall reimburse
Grantor  for its  proportionate  share of the Costs of such  relocation  of such
Segment or portion  thereof (to the extent  Grantor has not been  reimbursed  or
otherwise  compensated  by any other  Person) as  follows:  (i) if the  affected
Segment or portion thereof includes any conduits (whether or not occupied),  the
total Costs of relocation  of the affected  conduits  shall be allocated  (***).
     6.06  Notwithstanding  anything in this Agreement to the contrary,  the IRU
and Grantee's rights are subject to the terms of the Required  Rights,  provided
that the Required  Rights shall not contain  terms,  provisions  or  obligations
which conflict or are  inconsistent  with Grantee's  rights (it being understood
that Grantee's option rights under Section 7.06, prior to the exercise  thereof,
shall not be  considered  for this purpose)  under the IRU or this  Agreement or
Grantor's obligations thereunder or hereunder or which impose any other material
obligations or duties on Grantee,  and provided further that the Required Rights
may  contain   customary   provisions   regarding  access  and  other  customary
restrictions  and limitations.  Except as otherwise  provided in this Agreement,
Grantor will not obtain for itself or any of its Affiliates any material  rights
or benefits in respect of the Grantor System from the grantor or provider of any
Required  Right that it does not make available or cause to be made available to
Grantee on comparable terms.



 
                                       29
<PAGE>



                                   ARTICLE 7.
                                     CONDUIT

     7.01 Grantor shall use its commercially reasonable best efforts to have the
IRU for  each  Segment  of the  Grantor  System  consist  of 24  fibers  and one
unoccupied conduit (or comparable aerial segment).
     7.02 (***).



 
                                       30
<PAGE>



     7.03 Grantor shall give written notice to Grantee of the likely  occurrence
of a Pinch  Event  with  respect  to a Segment  or a portion  thereof,  promptly
following  Grantor's  knowledge of the  likelihood  of such Pinch  Event,  which
notice shall  certify that, in Grantor's  good faith  determination,  either (i)
such Pinch Event will be temporary and Grantor will deliver the Grantee  Conduit
in such Segment or portion  thereof by the date  specified in such notice (which
date shall not be later than the applicable  Completion Date) or (ii) such Pinch
Event will be permanent and Grantor will not deliver the Grantee  Conduit by the
applicable  Completion Date.  Notwithstanding  anything in this Agreement to the
contrary, (a) in the event that Grantor delivers a notice pursuant to clause (i)
above,  for  purposes of  determining  the Minimum  Period with  respect to such
Segment only,  the Acceptance  Date for the Segment or portion  thereof to which
such notice relates shall not commence  until the date that the Grantee  Conduit
has been delivered and (b) in the event that Grantor  delivers a notice pursuant
to clause (ii) above,  then Grantor  shall have no  obligation  to deliver,  and
Grantee shall have no  obligation  to accept or pay for, the Grantee  Conduit in
the Segment or portion  thereof to which such notice  relates  after the date of
such notice.  In each of clauses (a) and (b) above, the IRU Contribution and the
Recurring  Charge for such Segment shall be adjusted in accordance  with Section
7.04 below. If, prior to the later of the third  anniversary of the Commencement
Date and the delivery of the last Segment delivered  hereunder,  such Segment or
portion thereof includes at least three conduits, (A) in the event that a notice
has been delivered pursuant to clause (i) above,  Grantee shall take delivery of
and pay for the Grantee  Conduit in accordance with the terms of this Agreement,
and (B) in the event that a notice has been  delivered  pursuant  to clause (ii)
above, Grantee shall have the option (which option shall


 
                                       31
<PAGE>



be exercisable  within 30 days  following  receipt of written notice of proposed
delivery  by Grantor)  to take  delivery  of and pay for the Grantee  Conduit in
accordance  with the terms of this  Agreement.  In either such case,  if Grantee
takes delivery of and pays for the Grantee  Conduit,  the IRU  Contribution  and
Recurring  Charge for such Segment shall be adjusted as provided in Section 7.05
below.
     7.04 (***).
     7.05 In the event that (i)  Grantor  delivers a notice  pursuant to Section
7.03(i) and  Grantee  takes  delivery  of the Grantee  Conduit in the Segment or
portion  thereof to which such notice relates by the applicable  Completion Date
or (ii) Grantee exercises its


 
                                       32
<PAGE>



option  pursuant to clause (B) of the last  sentence of Section  7.03,  then (a)
Grantee  shall  reconvey to  Grantor,  or  relinquish  the use of, any fibers in
excess of the  Initial  Grantee  Fibers  granted to Grantee  pursuant to Section
7.02,  (b) Grantor shall  reimburse  Grantee for all  Incremental  Costs paid by
Grantee pursuant to Section 7.02 and (c) Grantee shall pay Grantor the excess of
the IRU Contribution for such Segment over the amount of the fee paid by Grantee
with respect thereto  pursuant to Section 7.04 and the Recurring Charge shall be
restored  from and after the date of such delivery to what it would have been if
such Pinch Event had not occurred.
     7.06  Grantor  agrees that in the event the  Grantor  System in any Segment
shall  include six or more conduits  (inclusive  of the Grantee  Conduit and the
conduit housing the Cable),  Grantee shall have the option to elect that the IRU
with  respect to the  Grantee  Fibers in such  Segment be  increased  to include
twenty-five  percent  (15%) of the fibers  installed  (rounded up to the nearest
whole fiber) in every conduit  after the first five  conduits  (inclusive of the
Grantee  Conduit  and  the  conduit   housing  the  Cable),   provided  that  if
Grantorgrants  to an  unrelated  party an  indefeasible  right to use all of the
fibers installed in any such conduit,  Grantee shall not have such option but in
lieu thereof  Grantor shall pay Grantee,  simultaneously  with the grant of such
right, an amount in cash equal to 25% of the value of the consideration received
by Grantor for such  indefeasible  right to use such fibers (it being understood
that,  if such  indefeasible  right  to use  such  fibers  is  part of a  larger
transaction,  any allocation of consideration  in such transaction  shall not be
relevant  for  purposes  of this  Section  7.06 and,  if Grantor and Grantee are
unable  to agree on the  amount  of the total  consideration  allocable  to such
indefeasible right to use, such amount shall be determined by the procedures set
forth in Article  24).  Grantor  shall give written  notice to Grantee  prior to
installing  any fiber in such sixth conduit and any  subsequent  conduit,  which
notice shall contain  Grantor's good faith  estimate of Grantee's  proportionate
share of the costs and other  amounts  described  below which will be payable by
Grantee.  If Grantor  installs  fiber in one or more conduits  contemporaneously
under circumstances where at least one of such conduits would be subject to this
Section  7.06,  Grantee  may select  which of those  conduits  is subject to its
option  rights under this Section  7.06.  Grantee  shall have a period of ninety
(90) days



 
                                       33
<PAGE>




after  receipt of such notice to exercise  its option under this Section 7.06 by
written  notice to Grantor.  In the event Grantee shall exercise its option with
respect  to such a conduit in any  Segment,  all fibers  installed  therein  for
Grantee's use shall be deemed to be and  constitute  Additional  Grantee  Fibers
hereunder and Grantee shall be responsible for, and Grantee shall pay to Grantor
from  time to time  during  the Term (at least  five (5) days  prior to the date
Grantor  is  required  to make  payments  as a result of the  occupancy  of such
conduit),  Grantee's  proportionate share (based on the number of fibers in such
conduit which will become Additional Grantee Fibers and the total fiber count in
such  conduit)  of each of: (i) the  Incremental  Costs  incurred  by Grantor in
connection  with the  installation  of the  Additional  Grantor  Fibers  in such
conduit;  (ii) the operating expenses incurred by Grantor in connection with the
fibers in such conduit;  and (iii) the fees,  costs or charges payable under the
terms of any related  Required  Right(s) as a result of the  placement or use of
fiber in such conduit.  In the event  Grantee shall fail to timely  exercise the
option  provided in this Section  7.06 with respect to a conduit,  or if Grantee
notifies  Grantor in writing of its desire to surrender such option with respect
to any conduit in any  Segment,  Grantee's  option with  respect to such conduit
shall terminate, but Grantee's option with respect to any subsequent conduits or
other Segments shall continue in full force and effect. Notwithstanding anything
contained in this Agreement to the contrary, Grantor shall never be obligated to
cause six or more  conduits to be installed as a part of the Grantor  System and
Grantor  shall not be in breach or  default  hereunder  or  otherwise  liable to
Grantee if the Grantor System does not include six or more conduits.  The rights
granted to Grantee under this Section 7.06 shall not apply to (x) any inner city
or local loop conduit  constructed or installed by Grantor in a city in the form
of a spur (which may have two or more connection  points) to the Grantor System,
provided that this sentence shall not modify Grantor's obligations under Section
2.02 or (y) if the Grantor System  consists of (***)  conduits,  any conduits in
excess of (***)  conduits  constructed  or installed by Grantor,  simultaneously
with and adjacent to the other conduits constituting part of the Grantor System,
expressly for exchange for conduits in another Segment or portion of the Grantor
System  provided  by an  unrelated  third  party  (and no more than a de minimis
amount of other consideration).



                                       34
<PAGE>

     7.07  Grantee  may elect at any time  during  the Term of a Segment to have
fibers  installed within all or any part of the Grantee Conduit in such Segment,
on such  reasonable  schedule as may be  specified  by Grantee  and  approved by
Grantor (which approval shall not be  unreasonably  withheld),  and,  subject to
Article 19, Grantor shall install such fibers in accordance  with such schedule,
subject to the  following:  (i) Grantee  shall  provide to Grantor for Grantor's
reasonable  approval  and, if  applicable,  to the  grantors or providers of any
Required Rights,  detailed  installation plans and specifications,  the proposed
contractor  or  contractors,  the  schedule  for  installation,  and such  other
information or documentation as may be reasonably requested by Grantor or as may
be required under any Required Right,  and (ii) Grantee shall reimburse  Grantor
for all Costs incurred by Grantor in connection with such  installation (but not
including the cost of  construction  of the Grantee  Conduit  itself).  7.08 Any
installation  of fiber for Grantee's use within a Segment under Sections 7.06 or
7.07 shall not extend the Minimum Period with respect to such Segment.

                                   ARTICLE 8.
                       CONSTRUCTION OF THE GRANTOR SYSTEM

     8.01 Grantor  will  design,  engineer,  install and  construct  the Grantor
System  (including  any  portion of the  Grantor  System  delivered  pursuant to
Article  7) in  conformity  with the  construction  specifications  set forth in
Exhibit "G" and all applicable manufacturer  specifications and in a workmanlike
manner and in accordance with industry standards and building,  construction and
safety codes, as well as any and all other applicable  governmental laws, codes,
ordinances,  statutes and  regulations.  Such  responsibilities  shall  include,
without   limitation,    preparation   of   construction   drawings,   materials
specifications  and  materials  requisitions.  The Grantee  Fibers shall meet or
exceed the applicable fiber specifications set forth in Exhibit "H". The Grantee
Conduit, and all other conduits in which Grantee Fibers are located,  shall meet
the applicable specifications set forth in Exhibit "H".


                                       35
<PAGE>



     8.02 Grantor will provide  Regeneration  Facilities and Opamp Facilities to
be located along the Grantor  System,  in each case  consisting of and providing
space and amenities as described in Exhibit "I".
     8.03 Grantor will undertake the Acceptance Testing of each of the Segments.
     8.04 Subject to Sections 7.02 and 7.07,  Grantor will procure all materials
to be  incorporated  in and to become a  permanent  part of the  Grantor  System
(other than fibers to be installed in the Grantee  Conduit which may be procured
by Grantee at Grantee's option).
     8.05  Subject  to the  provisions  of Article 6,  Grantor  will  obtain and
maintain in full force and effect the Required Rights without default by Grantor
thereunder.
     8.06  Grantor  and  Grantee  will  mutually  consult  with each other (on a
monthly  basis and at such other times upon request of either  party) to attempt
to coordinate construction of the Grantor System with other network construction
which may be undertaken by, or on behalf of, Grantee.
     8.07  During the  course of  construction  of each  Segment,  Grantor  will
prepare  and  provide to Grantee  (***) a  construction  schedule  and  progress
reports,  including notice regarding  whether Grantor  reasonably  believes that
such  Segment  may be  subject  to a  Pinch  Event.  Subject  to the  terms  and
provisions of any applicable  Required Right,  Grantee shall have the right, but
not the obligation,  on at least twenty four (24) hours prior notice to Grantor,
to inspect and be present at the  construction  and installation of each Segment
(which may consist of continuous  or regular  on-site  inspections  by dedicated
representatives of Grantee), including the installation, splicing and testing of
the Grantee  Fibers and the  installation  of the Grantee  Conduit  incorporated
therein;  provided  that no  inspection  or failure to inspect by Grantee  shall
impair or invalidate  any rights and remedies of Grantee under this Agreement or
modify,  amend  or  otherwise  affect  any of the  representations,  warranties,
covenants or agreements of Grantor under this  Agreement.  If, during the course
of any such construction,  installation, splicing or testing, any deviation from
the  specifications  set  forth  in  any  Exhibit  hereto  is  discovered,   the
construction or installation of the affected portion of the



                                       36
<PAGE>



Segment  shall be repaired  promptly to such  specifications  in such Exhibit at
Grantor's sole cost and expense.
     8.08  Grantor  shall make  available to Grantee for  inspection  by Grantee
copies of all information, documents, agreements, reports, permits, drawings and
specifications  generated,  obtained or acquired  by Grantor in  performing  its
duties  pursuant to this  Article 8 that are material to the grant of the IRU to
Grantee,  including the Required Rights,  subject only to the condition that the
terms  of each  such  document  or the  legal  restrictions  applicable  to such
information  or document  permits  disclosure to Grantee;  provided that Grantor
will use its  commercially  reasonable  best  efforts  to obtain a waiver of any
existing  confidentiality  and/or  non-disclosure  restrictions,  and to  exempt
Grantee from subsequent confidentiality and/or non-disclosure restrictions, that
would  restrict  Grantor's  ability to make such  documents  and/or  information
available to Grantee for inspection. 
     8.09  For  purposes  of the  foregoing,  Grantor  shall be  deemed  to have
complied with any Exhibit notwithstanding  deviations to such Exhibit,  provided
that Grantor (i)  notifies  Grantee of such  deviation  (which may be given in a
general  format at monthly  intervals  unless  Grantee  requests  more  specific
details),  (ii) compliance was not or would not be commercially  practicable and
(iii) such  deviations  do not  diminish  the  value,  utility,  reliability  or
expected  useful life of the item or matter  concerned  or  otherwise  adversely
affect Grantee's rights or obligations under this Agreement.
     8.10 The parties  acknowledge  that Grantee's  contributions to the cost of
constructing  the  Grantor  System  are  limited  to  the  payment  of  the  IRU
Contribution. Without limitation, Grantee will not have any obligation, over and
above payment of the IRU Contribution as contemplated hereunder, with respect to
Grantor's responsibilities set forth in Sections 8.01, 8.02, 8.03, 8.04 or 8.05.


                                       37
<PAGE>




                                   ARTICLE 9.
                               ACCEPTANCE TESTING

     9.01  Grantor  shall test the  Grantee  Fibers and the  Grantee  Conduit in
accordance   with  the  procedures  and  standards   specified  in  Exhibit  "J"
("Acceptance  Testing").  Acceptance  Testing shall  progress span by span along
each  Segment  as cable  splicing  progresses  or,  in the  case of the  Grantee
Conduit,  as set forth in Exhibit "J", so that test results may be reviewed in a
timely manner. Grantor shall provide Grantee with at least 14 days' prior notice
of the date and time of each  Acceptance  Testing  and  Grantee  shall  have the
right, but not the obligation, to be present to observe the Acceptance Testing.
     9.02 When Grantor reasonably  determines the Grantee Fibers and the Grantee
Conduit  with  respect to an entire  Segment  are  installed  and  operating  in
conformity  with the applicable  specifications  set forth in Exhibits "G", "H",
and "J", and Grantor is otherwise in  compliance  with the other  provisions  of
this  Agreement  with respect to such Segment,  Grantor  shall  provide  written
notice of same to Grantee (a "Completion  Notice"),  together with a copy of the
results of the  Acceptance  Testing  for such  Segment.  Grantee  shall,  within
fifteen (15) days of receipt of the Completion  Notice,  either accept or reject
the Completion Notice  (specifying,  if rejected,  the defect or failure in such
Acceptance  Testing and/or the items required to be remedied  and/or replaced in
order for such Segment to be in conformity  with the  applicable  specifications
set forth in Exhibit "J" and other  provisions of this Agreement) by delivery of
written notice to Grantor.  In the event Grantee rejects the Completion  Notice,
Grantor shall promptly, and at no cost to Grantee, commence to remedy the defect
or failure.  Thereafter,  Grantor  shall again give Grantee a Completion  Notice
with respect to such  Segment.  The  foregoing  procedure  shall apply again and
successively  thereafter until Grantor has remedied all defects or failures. Any
failure by  Grantee  to timely  reject a  Completion  Notice  shall be deemed to
constitute acceptance for purposes of this Agreement,  and in that event Grantee
shall be deemed to have  delivered a notice of  acceptance  on the thirtieth day
after delivery of the Completion Notice. The successful completion of Acceptance
Testing, and the


                                       38
<PAGE>



occurrence of an  Acceptance  Date,  with respect to the Grantee  Fibers and the
Grantee  Conduit in accordance  with this Article 9 shall not relieve Grantor of
its  obligation  to repair  defects in the  Grantor  System in  accordance  with
Section 12.02.

                                   ARTICLE 10.
                                     ACCESS

     10.01 Grantor shall provide  Grantee with access to, and Grantee shall have
the right to  interconnect  with, the Grantee Fibers and the Grantee  Conduit at
Segment  End Points and,  subject to the terms and  provisions  of the  Required
Rights,  at other  technically  feasible  access points along the Grantor System
(the  "Access  Points").  The specific  location of such Access  Points shall be
determined by Grantor during the design,  engineering  and permitting  phases of
construction and after  consultation and  coordination  with Grantee,  and, at a
minimum,  Access Points will be provided at the  intervals  specified in Exhibit
"I".
     10.02 Grantor may route the Grantee Fibers through  Grantor's  space in the
Regeneration  Facilities or Opamp  Facilities in its sole discretion (so long as
such routing does not materially adversely affect the security, safety or use of
the  Grantee  Fibers or the  Associated  Property).  Grantee  Fibers  may,  upon
Grantee's written consent (which shall not be unreasonably  withheld), be routed
through Grantor's terminal, endlink or pop sites. In each case, Grantor shall be
responsible for all costs and expenses associated therewith.
     10.03 Grantor shall have the right to control all activities concerning the
Grantor System at all of the Access  Points,  provided that after the Acceptance
Date for each Segment,  Grantor shall not splice  Grantee  Fibers located in any
Segment or otherwise undertake any activities with respect to the Grantee Fibers
or the Grantee  Conduit  located in such  Segment  except in  connection  with a
relocation  pursuant to Section  6.05,  as required  to perform  maintenance  as
described  in Exhibit "K" or as  otherwise  directed  by  Grantee.  In the event
Grantor shall undertake any such activities  (including splicing) related to the
Grantee Fibers and/or Grantee Conduit at any Access Point at Grantee's  request,
such activities shall be conducted in accordance with requirements as agreed to


                                       39
<PAGE>



by the parties and Grantee  shall  reimburse  Grantor for all Costs  incurred by
Grantor in connection with such activities.
     10.04  Grantor  shall  determine  the exact  locations of the  Regeneration
Facilities  and  Opamp  Facilities  after  consultation  and  coordination  with
Grantee.  Grantee  shall have access to the  Regeneration  Facilities  and Opamp
Facilities 24 hours per day, 7 days per week, provided that Grantee shall comply
with such customary access requirements  consistent therewith as provided in the
Required Rights.
     10.05  Following  the  initial  construction  of the  Grantor  System  in a
Segment,  Grantor agrees to allow Grantee, subject to customary access and other
customary  restrictions and limitations of any applicable  Required  Rights,  to
establish  additional  technically  feasible  Access  Points  along the  Grantor
System.  Grantor  agrees to use  commercially  reasonable  good faith efforts to
obtain the consent or approval,  if  necessary,  of a grantor or provider of any
applicable  Required Right in connection with such additional Access Points. Any
additional  Access Points shall be  constructed  or installed by Grantor and all
Costs associated therewith shall be paid by Grantee.
     10.06 Grantor shall (i) make available to Grantee such dedicated  space and
amenities (e.g., power, caging,  lighting,  etc.) in Regeneration Facilities and
Opamp Facilities (***) and (ii) cause such  Regeneration and Opamp Facilities to
be  located at such  intervals  as set forth on  Exhibit  "I" along the  Grantor
System as are  necessary to light the Initial  Grantee  Fibers  using  equipment
requiring facility space similar to  industry-standard  equipment like that used
by Grantor to provision similar capacity over the same number of fibers,  (***).
     10.07  If  after  the  Acceptance  Date  for a  Segment,  Grantee  requires
additional  space within a  Regeneration  Facility or Opamp Facility in order to
utilize the  Grantee  Fibers  (including  any fibers  which may be  subsequently
installed in the Grantee  Conduit),  Grantor shall use  commercially  reasonable
best  efforts  to  provide  such   additional   space  (which  may  include  the
construction of new regeneration or opamp facilities or the


                                       40
<PAGE>



enlargement of existing Regeneration Facilities and Opamp Facilities); provided,
in no event shall  Grantor be required to provide  Grantee  with any  additional
space which,  with the initial Grantee space, is greater than the space required
by Grantor to provide similar capacity utilizing an equivalent number of its own
fibers,  provided  further that  Grantor  shall have no  obligations  under this
Section 10.07 for any additional  space located  outside Grantor System right of
way unless  Grantee has no other  commercially  reasonable  alternative.  To the
extent any such  additional  space  shall  require  the consent or approval of a
grantor  or  provider  or  a  Required  Right,  Grantor  will  use  commercially
reasonable  best efforts to obtain such consent or approval.  Grantee  shall pay
all Costs relating to any such additional space. 
     10.08 The IRU granted  hereunder  shall include  Grantee's right to install
equipment,  or replace  existing  equipment,  in the space  located at the Opamp
Facilities and  Regeneration  Facilities  made available to Grantee  pursuant to
this  Agreement.  All such equipment shall be owned by Grantee and Grantor shall
have no right, title or interest therein.

                                   ARTICLE 11.
                                   OPERATIONS

     11.01  Subject to Articles 6 and 15,  Grantee  shall have full and complete
control and  responsibility  for determining all matters with respect to the use
of the Grantee Fibersand the Grantee Conduit, including, without limitation, any
network  and  service   configuration   or  designs,   routing   configurations,
re-grooming,  rearrangement  or  consolidation  of channels or circuits  and all
related functions with regard to the use of the Grantee Fibers.
     11.02 Grantee acknowledges and agrees that except for the items included as
a part of the  Regeneration  Facilities  and Opamp  Facilities  as  described on
Exhibit  "I",  Grantor is not  supplying  nor is Grantor  obligated to supply to
Grantee any optronics or electronics or optical or electrical equipment or other
facilities,  all of which are the sole responsibility of Grantee, nor is Grantor
responsible for performing any work other than as specified in this Agreement.


                                       41
<PAGE>




     11.03  Following the  Acceptance  Date for any Segment,  upon not less than
(***) days written  notice from  Grantor to Grantee,  Grantor may at its option,
subject  to  Grantee's  prior  written  approval  (which  approval  shall not be
unreasonably  delayed or withheld)  substitute for the Initial Grantee Fibers in
any Segment or Segments,  an equal number of  alternative,  newer fibers  within
another conduit constituting part of the Grantor System (but not fibers acquired
from third parties  unless the Grantee Fibers being  substituted  were delivered
pursuant to Section 2.05),  provided that in any such event,  such  substitution
(i) shall be in accordance with Grantee's applicable operating procedures,  (ii)
shall be effected at the sole cost of Grantor,  including,  without  limitation,
all  disconnect  and  reconnect  costs,  fees  and  expenses,   (iii)  shall  be
constructed in accordance  with the  specifications  and procedures set forth in
Exhibits "G" and "J",  incorporate fiber and conduit meeting the  specifications
set  forth  in  Exhibit  "H" and  successfully  tested  in  accordance  with the
Acceptance  Testing,  (iv) shall not interrupt the operation or adversely affect
the use,  operation or performance of Grantee's  network or business,  or change
any Segment End Points, Access Points,  Regeneration Facilities,  node or switch
facilities  used by  Grantee  hereunder,  all as  determined  by  Grantee in its
reasonable discretion,  (v) shall not modify Grantor's obligations under Article
7 and (vi) Grantee shall be reasonably  satisfied that any such relocation shall
not otherwise affect its rights, privileges or costs under this Agreement.

                                   ARTICLE 12.
                  MAINTENANCE AND REPAIR OF THE GRANTOR SYSTEM

     12.01 From and after the  Acceptance  Date with  respect  to each  Segment,
Grantor shall maintain such Segment, or cause such Segment to be maintained in a
workmanlike  manner and, in accordance  with the  maintenance  requirements  and
procedures set forth in Exhibit "K" attached hereto, all applicable manufacturer
specifications,  industry standards and building, construction and safety codes,
as well as any and all other applicable  governmental  laws, codes,  ordinances,
statutes and regulations. The costs of



                                       42
<PAGE>



all scheduled  maintenance of the Grantee Fibers and/or Grantee Conduit shall be
paid by Grantor; provided, however, that Grantee shall reimburse Grantor for its
(***) of the Costs  (excluding costs which Grantor would otherwise have incurred
as part of  scheduled  maintenance  e.g.,  if  personnel  otherwise on scheduled
maintenance  duty  attend  to the  unscheduled  situation)  of  any  unscheduled
maintenance  and repair of the Grantee Fibers and/or Grantee Conduit as follows:
(i) if the affected portion of the Grantor System includes any conduits (whether
or not  occupied),  the total Costs of repair of the affected  conduits shall be
allocated  pro rata among the conduits  affected;  (ii) such Costs  allocated to
each affected conduit carrying the Grantee Fibers shall be further  allocated to
Grantee (***).
     12.02  Notwithstanding  anything in this Agreement to the contrary, if , at
any time prior to the date that is (***) months after the Acceptance  Date for a
Segment, Grantee shall notify Grantor in writing of its discovery of a deviation
from the  specifications  set forth in any Exhibit  hereto with  respect to such
Segment,  the  construction  or  installation  of the  affected  portion of such
Segment shall be repaired promptly to such specification by Grantor at Grantor's
sole cost and expense.

                                   ARTICLE 13.
                                RECURRING CHARGE

     13.01 Except as expressly  provided  otherwise in this  Agreement,  Grantor
shall be responsible  for the payment of all costs and expenses  relating to the
Grantor System, including,  without limitation, (i) all fees and charges payable
to the  grantors  or  providers  of the  Required  Rights,  (ii)  the  costs  of
constructing and maintaining the Grantor System,  (iii) all charges and expenses
(including  utility  charges)  associated with the operation of the Regeneration
Facilities and Opamp Facilities and (iv) all Impositions.


                                       43
<PAGE>




     13.02 In consideration of Grantor's  responsibilities  in Section 13.01 and
otherwise under this Agreement, subject to the adjustments described in Sections
7.04, 7.06 and 13.03 through 13.07, Grantee shall pay to Grantor each year, with
respect to each Segment, commencing with the Acceptance Date of such Segment and
continuing  until the Term of the IRU with  respect to such  Segment  shall have
expired or terminated,  the following  sums (the  "Recurring  Charge"):  (i) the
product  obtained when: (A) (***) is multiplied by (B) the number of Route Miles
in such Segment (the "ROW  Charge"),  plus (ii) the product  obtained  when: (A)
(***) is  multiplied  by (B) the  number  of Route  Miles in such  Segment  (the
"Operating Expense Charge").
     13.03  Commencing on the date of  installation of any Grantee Fibers within
the Grantee  Conduit,  the ROW Charge shall be increased by the product obtained
when:  (i) (***) is  multiplied  by (ii) the number of Route Miles where Grantee
Fibers have been installed in the Grantee Conduit.
     13.04 (***).
     13.05 (***).



                                       44
<PAGE>



     13.06 The Recurring Charge  applicable to each Segment,  as the same may be
adjusted from time to time pursuant to the foregoing  provisions of this Article
13, the Operating  Expense Estimate and the sums described in Section  13.03(i),
13.04(i)(A)  and  13.04(ii)(A),  shall be  adjusted on each  anniversary  of the
Acceptance  Date of such Segment by the change,  if any, in the  Consumer  Price
Index,  All Urban Consumers,  U.S. City Average,  published by the United States
Department of Labor, Bureau of Labor Statistics (the "CPI-U"), for the preceding
twelve month period (or, with respect to the Operating  Expense  Charge,  in the
event such index shall cease to be  computed or  published,  Grantor and Grantee
shall mutually designate a comparable  successor index to be used in determining
the  adjustment to such Charge);  provided that (a) the ROW Charge for a Segment
shall  only be  adjusted  pursuant  to this  Section  13.06  to the  extent  the
instrument governing the Required Right for such Segment explicitly provides for
an  adjustment  based on the CPI-U or a comparable  index and (b) the  Operating
Expense  Charge  and the  Operating  Expense  Estimate  shall  only be  adjusted
pursuant to this Section  13.06 if neither  Grantee nor Grantor has performed an
audit for the preceding twelve-month periods in accordance with Section 13.05.
     13.07  Grantee  shall  pay the  Operating  Expense  Charge  portion  of the
Recurring  Charge  for a Segment  monthly  on the first day of each month of the
Term of the IRU respecting  such Segment (with the Operating  Expense Charge for
any partial calendar month  prorated).  Grantee shall pay the ROW Charge portion
of the Recurring  Charge for all Segments in the  aggregate on a monthly  basis,
with the amount of each month's  payment  being equal to the amount  obtained by
multiplying  the total amount of ROW Charges due by Grantee on all Segments by a
fraction, the numerator of which is the total



                                       45
<PAGE>



amount of Required  Right  Payments due by Grantor on all  Segments  during such
month  and the  denominator  of which is the  total  amount  of  Required  Right
Payments due by Grantor on all Segments during the calendar year.
     13.08  Notwithstanding  anything in this Agreement to the contrary,  if (i)
any  Segment  is the  subject  of a  Force  Majeure  Event  which  results  in a
disruption of Grantee's  operations or business and (ii) Grantor's obligation to
pay costs and expenses relating to such Segment of the type described in Section
13.01 is relieved or excused,  in whole or in part,  during the pendency of such
Force Majeure  Event,  then Grantee's  obligation to pay Recurring  Charges with
respect to such Segment during the pendency of such Force Majeure Event shall be
proportionately reduced.
     13.09 In  addition  to  Grantee's  other  rights  and  remedies  under this
Agreement and under  applicable  law,  Grantee shall have the right from time to
time, to the fullest extent  permitted by law, to set off or deduct amounts owed
to Grantor hereunder  (including,  without  limitations,  amounts required to be
reimbursed  to Grantee  pursuant to Sections  6.02(c) and 14.07) from or against
any and all payments required to be made to Grantor pursuant to this Article 13.

                                   ARTICLE 14.
                                   IMPOSITIONS

     14.01  Grantor and Grantee  acknowledge  and agree that it is their  mutual
objective  and intent to (i)  minimize,  to the extent  feasible,  the aggregate
Impositions  payable  with  respect  to the  Grantor  System and (ii) share such
Impositions  according to their respective  interests in the Grantor System, and
that they will cooperate with each other and coordinate  their mutual efforts to
achieve such objectives in accordance with the provisions of this Article 14.
     14.02  Grantor  shall be  responsible  for and shall timely pay any and all
Impositions with respect to the Grantor System which  Impositions are imposed or
assessed  prior  to  the  Acceptance  Date  of a  Segment.  Notwithstanding  the
foregoing  obligations,  Grantor  shall  have the  right to  challenge  any such
Impositions so long as the



                                       46
<PAGE>



challenge of such  Impositions  does not adversely  affect  Grantee's  rights or
interests hereunder.
     14.03 After the Acceptance Date for each Segment, Grantor shall timely pay,
or cause to be paid,  any and all  Impositions  imposed  upon or with respect to
such  Segment  to the  extent  such  Impositions  (a) have  not been  separately
assessed  or imposed  upon or against  the  interest  of Grantee in the  Grantor
System or (b)  consist of real  property  or ad valorem  taxes  relating  to the
Grantor System, including, without limitation, real property or ad valorem taxes
on the Initial Grantee  Fibers,  the Grantee  Conduit and the  Regeneration  and
Opamp Facilities  (whether or not such Impositions have been separately assessed
or imposed upon or against the interest of Grantee in the Grantor System), which
real property or ad valorem taxes shall  constitute part of the Actual Operating
Expenses  and shall be subject to  adjustment  as  described in Article 13. Upon
receipt of a notice of any Imposition after the Acceptance Date for any Segment,
Grantor shall promptly notify Grantee of such  Imposition and following  payment
of such  Imposition by Grantor,  Grantee  shall,  within thirty (30) days of its
receipt of an invoice  from  Grantor,  reimburse  Grantor for its  proportionate
share of such Imposition (except for the Impositions  described in clause (b) of
this Section 14.03,  which Impositions shall constitute part of Actual Operating
Expenses and shall be paid in accordance  with Article 13), which share shall be
determined  (i) to the extent  possible,  based upon the manner and  methodology
used by the particular authority imposing such Impositions (e.g., on the cost of
the  relative  property   interests,   historic  or  projected  revenue  derived
therefrom,  or any  combination  thereof);  or (ii)  if the  same  cannot  be so
determined,  then based upon  Grantee's  proportionate  share of the total fiber
count in the  affected  portion of the Grantor  System,  provided  that any such
Imposition  which was separately  assessed  against  Grantee or any other Person
using the  Grantor  System  shall be taken  into  account  in  determining  such
proportionate  share.  Grantor shall provide Grantee with reasonable  supporting
documentation  for  Impositions  for which Grantor seeks  reimbursement.  If any
Imposition  assessed  upon  Grantor or Grantee is based on assets or business in
any state in addition  to its  interest in the  Grantor  System  (i.e.,  central
assessment), Grantor and Grantee shall work together in good faith to allocate a
proper portion of such


                                       47
<PAGE>



assessment  to such  interests  alone and if Grantor  and  Grantee are unable to
agree on such  allocation  within  thirty  (30)  days from the date  Grantor  or
Grantee  delivered  notice to the other party  regarding such  allocation,  such
allocation  shall be determined by an arbitration  procedure in accordance  with
Section 24.01(iv).
     14.04 Upon notice of the assertion or proposed  assertion of any Imposition
described in Section  14.03,  Grantor  shall  promptly and in good faith consult
with  Grantee  concerning  the  underlying  facts and  whether  to contest or to
continue to contest such assertion or proposed  assertion.  Notwithstanding  any
provision  herein to the  contrary,  Grantor shall have the right to contest any
Imposition  described in Section 14.03 above by any lawful and appropriate means
(including by nonpayment of such Imposition),  provided such nonpayment does not
adversely affect the title (if applicable),  rights or property  delivered or to
be delivered to Grantee pursuant hereto.  The  out-of-pocket  costs and expenses
(including  reasonable  attorney  fees)  incurred by Grantor in any such contest
shall be shared by Grantor  and Grantee in the same  proportion  as to which the
parties would have shared in such Impositions, as they were originally assessed.
Any refunds or credits resulting from a contest brought pursuant to this Section
14.04 shall be divided  between Grantor and Grantee in the same proportion as to
which such refunded or credited  Impositions  were borne by Grantor and Grantee.
In any such event,  Grantor  shall provide  timely  notice of such  challenge to
Grantee.  If Grantor  chooses to proceed with such challenge  after receipt of a
written  objection to the  challenge  from  Grantee,  Grantor shall conduct such
challenge at its own cost and expense,  provided  that Grantee shall not receive
the  benefit  of any  refund  or  credit,  if any,  obtained  as a  result  of a
successful challenge.  If Grantor does not contest an Imposition,  Grantee shall
have the right,  after notice to Grantor,  to contest such Imposition as long as
such contest does not adversely affect the title, property or rights of Grantor.
The  out-of-pocket  costs and expenses  (including  reasonable  attorney's fees)
incurred by Grantee in any such  contest  shall be shared by Grantee and Grantor
in the same proportion as to which the parties shared in such Imposition,  as it
was originally  assessed.  Any refunds or credits resulting from a contest shall
be divided  between  Grantee and Grantor in the same proportion as to which such
refunded or credited Imposition was borne by Grantee and Grantor. If


                                       48
<PAGE>



Grantee chooses to proceed with such contest after receipt of written  objection
to the challenge  from Grantor,  Grantee shall conduct such challenge at its own
cost and expense,  provided  that  Grantor  shall not receive the benefit of any
refund  or  credit,  if any,  obtained  as a result of a  successful  challenge;
provided, however, that notwithstanding anything to the contrary in this Article
14,  Grantor  shall  have  complete  authority  over and  discretion  to control
(including  the  authority  to dismiss or not pursue) any  contests  relating to
Impositions  based upon the  computation  of Grantor's  taxable income under the
Internal Revenue Code or state income or franchise tax laws.
     14.05 Following the Acceptance Date for each Segment,  Grantor and Grantee,
respectively,  shall  be  separately  responsible  for any  and all  Impositions
(except for the  Impositions  described  in clause (b) of Section  14.03,  which
shall  constitute a part of the Actual  Operating  Expenses and shall be paid in
accordance  with Article 13) (i)  expressly or implicitly  imposed  upon,  based
upon, or otherwise measured by the gross receipts, gross income, net receipts or
net income  received by or accrued to such party due to its respective  interest
in or use of such Segment and/or the Grantee  Fibers and/or the Grantee  Conduit
located  within such  Segment,  or (ii) which have been  separately  assessed or
imposed upon the  respective  interest of such party in such Segment  and/or the
Grantee Fibers and/or the Grantee Conduit located within such Segment.
     14.06 Grantor and Grantee agree to cooperate  fully in the  preparation  of
any returns or reports relating to the Impositions.  Grantor and Grantee further
acknowledge  and agree that the  provisions  of this  Article 14 are intended to
allocate  the  Impositions  expected to be assessed  against or imposed upon the
parties with respect to the Grantor System based upon the procedures and methods
of computation by which Impositions  generally have been assessed and imposed to
date, and that material  changes in the procedures and methods of computation by
which such  assessments are assessed and imposed could  significantly  alter the
fundamental  economic assumptions  underlying the transactions  hereunder to the
parties.  Accordingly,  Grantor  and Grantee  agree  that,  if in the future the
procedures  or methods of  computation  by which  Impositions  are  assessed  or
imposed against the parties change  materially from the procedures or methods of
computation  by which they are imposed as of the date  hereof,  the parties will
negotiate in



                                       49
<PAGE>



good  faith  an  amendment  to the  provisions  of this  Article  14 in order to
preserve,  to the extent reasonably possible,  the economic intent and effect of
this Article 14 as of the date hereof.
     14.07  Notwithstanding  anything in this Agreement to the contrary,  in the
event that Grantor fails to pay any  Imposition it is required to pay under this
Agreement  Grantee  may,  at its  option (i) pay such  Imposition  to the taxing
authority  assessing such  Imposition  and (ii) pay all  subsequent  Impositions
assessed by such taxing  authority,  unless Grantee shall have received  written
notice from  Grantor the Grantee  will pay timely all such  Impositions.  In the
event Grantee makes any payments  pursuant to this Section 14.07,  Grantor shall
reimburse Grantee promptly upon demand for any and all amounts paid by Grantee.

                                   ARTICLE 15.
                              USE OF GRANTOR SYSTEM

     15.01 Grantee  represents  and warrants that it will use the Grantee Fibers
and/or Grantee  Conduit and the IRU hereunder in compliance  with all applicable
government codes,  ordinances,  laws, rules and regulations.  Grantor represents
and  warrants  that it will use the Grantor  System,  and shall obtain from each
other user of the Grantor System a representation  and warranty that it will use
the  Grantor  System,  in  compliance  with  all  applicable  government  codes,
ordinances, laws, rules and regulations.
     15.02 Subject to the  provisions of Article 6 and this Article 15,  Grantee
may use the  Grantee  Fibers,  the  Grantee  Conduit  and the IRU for any lawful
purpose. Grantee acknowledges and agrees that it has no right to use any fibers,
other than the Grantee  Fibers,  included or incorporated in the Grantor System,
and that Grantee  shall keep any and all of the Grantor  System,  other than the
Grantee Fibers,  the Grantee Conduit and Grantee's  interest in and right to use
the Associated  Property,  free from all Liens attributable to Grantee.  Grantor
acknowledges  and agrees that it (i) has no right to use the  Grantee  Fibers or
the Grantee Conduit,  (ii) shall keep the portion of the Grantor System in which
Grantee shall receive the IRU free and clear of all Liens attributable to



                                       50
<PAGE>



Grantor  (other  than the Liens in favor of  Grantee  created  pursuant  to this
Agreement)  and (iii) shall obtain an  acknowledgment  and  agreement  from each
other  Person that uses the Grantor  System that such Person has no right to use
the  Grantee  Fibers or the  Grantee  Conduit  and shall keep the portion of the
Grantor  System in which  Grantee  shall  receive  the IRU free and clear of all
Liens of any third party attributable to such Person.
     15.03 (***).
     15.04  Neither  Grantor nor Grantee  shall use the Grantor  System in a way
which physically  interferes in any way with or otherwise  adversely affects the
use of the  fibers,  cable or  conduit  of any other  Person  using the  Grantor
System,  provided that customary and normal  telecommunications  activities will
never be deemed to physically  interfere with or otherwise  adversely affect the
use of the fibers, cable or conduit of any Person and


                                       51
<PAGE>



Grantor  shall obtain a similar  agreement  from each other Person that uses the
Grantor System.
     15.05 Grantee and Grantor shall  promptly  notify each other of any matters
pertaining  to, or the  occurrence  (or impending  occurrence)  of, any event of
which it is aware that could give rise to any damage or  impending  damage to or
loss of the Grantor System, or any impairment of Grantee's right of use or other
rights and privileges therein.

                                   ARTICLE 16.
                                 INDEMNIFICATION

     16.01 Subject to the provisions of Section 3.04, Section 16.07,  Article 17
and Section 22.03, Grantor hereby agrees to indemnify,  defend, protect and hold
harmless Grantee,  its Affiliates,  the Designated Parties and their Affiliates,
and their respective employees,  officers, directors, agents and representatives
(the "Grantee Indemnified Parties") from and against, and assumes liability for,
any and all  claims,  injuries,  losses,  expenses,  damages or  liabilities  of
Grantee or any other Grantee  Indemnified Party (including,  without limitation,
reasonable  attorneys'  fees)  (collectively,  "Losses")  which  arise out of or
result  from,  directly or  indirectly,  in whole or in part:  (i) the breach by
Grantor of any of its representations, covenants or other obligations hereunder;
(ii) the negligence or willful misconduct of Grantor,  its officers,  employees,
servants,  Affiliates,  agents,  contractors,  licensees,  invitees  and vendors
arising out of or in connection  with the  performance  by Grantor or such other
Persons  of  their  respective  obligations  under  this  Agreement;  (iii)  any
violation by Grantor or its Affiliates of any regulation, rule, statute or court
order of any  Governmental  Authority  in  connection  with the  performance  by
Grantor of its obligations under this Agreement;  and (iv) any interference with
or  infringement  of the  rights  of a third  party  as a  result  of a  Grantee
Indemnified  Party's use of the Grantor System in accordance with the provisions
of this Agreement.
     16.02 Grantee hereby agrees to indemnify, defend, protect and hold harmless
Grantor and its Affiliates, and their respective employees, officers, directors,
agents and representatives (the "Grantor Indemnified Parties") from and against,
and assumes


                                       52
<PAGE>



liability  for, any and all Losses of Grantor or any other  Grantor  Indemnified
Party which arise out of or result from, directly or indirectly,  in whole or in
part:  (i) the  breach by Grantee of any of its  representations,  covenants  or
other  obligations  hereunder;  (ii) the  negligence  or willful  misconduct  of
Grantee, its officers,  employees,  servants,  Affiliates,  agents, contractors,
licensees,  invitees  and  vendors  arising  out of or in  connection  with  the
performance  by Grantee or such other  Persons of their  respective  obligations
under this  Agreement;  and (iii) any violation by Grantee or its  Affiliates of
any regulation,  rule,  statute or court order of any Governmental  Authority in
connection  with the  performance  by  Grantee  of its  obligations  under  this
Agreement.
     16.03 Grantor and Grantee agree to promptly  provide each other with notice
of any  claim  which  may  result in an  indemnification  obligation  hereunder,
provided, however, that the indemnifying party's obligations hereunder shall not
be affected by the failure to give such notice  except to the extent that it can
demonstrate that it was materially  prejudiced  thereby.  The indemnifying party
may defend such claim and, if it so elects,  such defense shall be controlled by
the indemnifying party and all costs associated with such defense shall be borne
by the indemnifying  party. In any such proceeding,  the indemnified party shall
have the right to participate in such defense at its own expense,  provided that
the  indemnifying  party shall pay the  reasonable  fees and expenses of counsel
retained by the indemnified  party in the event that (i) the indemnifying  party
and the  indemnified  party shall have mutually  agreed to the retention of such
counsel  or (ii) the  named  parties  to any  such  proceedings  (including  any
impleaded parties) include both the indemnifying party and the indemnified party
and  the   representation   of  both  parties  by  the  same  counsel  would  be
inappropriate,  in the  reasonable  opinion  of the  indemnified  party,  due to
material,  actual or potential  differing  interests  between them. In the event
that the indemnified  party retains separate counsel at the indemnified  party's
expense in accordance with the foregoing sentence, the indemnified party and its
counsel will reasonably cooperate with the indemnifying party and its counsel in
order to minimize the  indemnifying  party's overall legal expenses  relating to
the claim. In no event shall the indemnifying  party be liable for more than one
firm of attorneys (in addition to local counsel with respect to any jurisdiction
in which



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local  counsel may be  required)  for all  indemnified  parties in any one legal
action or group or related legal actions.
     16.04 The  indemnifying  party shall have the right to settle or compromise
any such claim of which it has  assumed  the  defense  only upon the  receipt of
written consent to such  settlement or compromise  from the  indemnified  party,
which consent shall not be unreasonably withheld or delayed; provided,  however,
that the  indemnified  party shall not be obligated to consent to any settlement
unless it involves  claims for money  damages only or other relief not involving
or affecting the indemnified party, which are being paid or performed in full by
other than the indemnified  party,  and any such failure to consent shall not be
deemed unreasonable.
     16.05 If the  indemnifying  party  fails to assume  the  defense of a claim
pursuant  to  Section  16.03,   then,  upon  twenty  (20)  days  notice  to  the
indemnifying  party setting forth the details  thereof,  the  indemnified  party
shall  have the right to pay,  compromise  or  defend  any such  claim  (without
further  notice  to the  indemnifying  party)  and to assert  the  amount of any
payment on such claim plus the expense of defense or  settlement as an indemnity
claim.  The  indemnified  party shall also have the right,  exercisable  in good
faith and upon reasonable prior notice to the  indemnifying  party, to take such
action as may be reasonably necessary to avoid a default prior to the assumption
of the defense of the claim by the indemnifying  party and any expenses incurred
by so acting shall be paid by the indemnifying party.
     16.06  Grantor  and Grantee  each  expressly  recognize  and agree that its
obligation to indemnify,  defend,  protect and save the other  harmless is not a
material  obligation to the continuing  performance of its obligations,  if any,
hereunder.  In the event that a party shall fail for any reason to so indemnify,
defend,  protect and save the other harmless, the injured party hereby expressly
recognizes  that its sole remedy in such event shall be the right to bring legal
proceedings  against  the other  party for its  damages as a result of the other
party's said failure to  indemnify,  defend,  protect and save  harmless.  These
obligations shall survive the expiration or termination of this Agreement.
     16.07  Notwithstanding the foregoing  provisions of this Article 16, to the
extent  Grantor is required under the terms and provisions of any Required Right
to indemnify


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the grantor or  provider  thereof  from and  against any and all claims,  suits,
judgments,   liabilities,  losses  and  expenses  arising  out  of  the  service
interruption,  cessation or unreliability  of the Grantor System,  regardless of
whether such claims,  suits,  judgments,  liabilities,  losses or expenses arise
from the sole or partial  negligence,  actions or  inaction  of such  grantor or
provider and its employees,  servants, agents,  contractors,  sub-contra