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                                                                   EXHIBIT 10.13

              SOFTWARE DEVELOPMENT AND TECHNICAL SERVICES AGREEMENT

         THIS SOFTWARE DEVELOPMENT AND TECHNICAL SERVICES AGREEMENT
("Agreement") effective as of ___________, 2000 (the "Effective Date"), is made
between GTE Service Corporation, a New York corporation, with offices for this
Agreement at 1255 Corporate Drive, Irving, Texas 75038, and its Affiliates
("GTE") on the one hand, each only with respect to their respective obligations
hereunder, and Genuity Inc., a Delaware corporation, with offices for this
Agreement at 3 Van de Graaff Drive, Burlington, Massachusetts 01803 ("GENUITY")
on the other hand.

         WHEREAS, GENUITY pursuant to this Agreement will be allowed to procure
software development and other technical services from GTE, with the services
defined in individual Statements of Work, and the ownership and rights in
intellectual property deliverables to GENUITY pursuant to the Statements of Work
being apportioned between the parties, with the term of the Agreement being one
year, or as otherwise set forth in a specific Statement of Work, but renewable
at the option of the parties and terminable by GENUITY.

     Now, therefore, in mutual consideration of the promises and obligations set
forth below, the parties agree as follows:

1. General.

         GTE and GENUITY desire to establish a contractual relationship pursuant
to which GENUITY and its subsidiary companies will obtain from GTE or an
Affiliate of GTE, and GTE or the Affiliate will provide to GENUITY and its
subsidiary companies, software development and other technical services in
accordance with the terms and conditions set forth in this Agreement.

2. Definitions.

         For purposes of this Agreement, and in addition to certain terms
defined on first use herein and in any schedule attached hereto, the following
terms shall have the following meanings.

         2.1. "Affiliate" shall mean an entity that controls, is under common
control with, or that is controlled by, the entity with which it is affiliated.

         2.2. "Change Order" shall mean a change order signed by both parties as
provided in Section 3.7.

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         2.3. "Deliverable" shall mean Software, Documentation or other
materials and information delivered or otherwise provided by GTE to GENUITY
under the terms of this Agreement and the applicable Statement of Work.

         2.4. "Documentation" shall mean written documentation provided by GTE
to GENUITY in connection with a Technical Effort, as provided in the Statement
of Work for that Technical Effort.

         2.5. "Exclusive Statement of Work" shall mean a Statement of Work under
which GTE agrees to provide Deliverables exclusively to GENUITY.

         2.6. "Intellectual Property Rights" shall mean any and all worldwide
rights existing now or in the future under patent law, copyright law, industrial
rights design law, semiconductor chip and mask work protection law, moral rights
law, trade secret law, trademark law, unfair competition law, publicity rights
law, privacy rights law, and any and all similar proprietary rights, however
denominated, and any and all renewals, extensions and restorations thereof, now
or hereafter in force and effect.

         2.7. Internal Business Purposes" shall mean the internal operation of a
licensee's business in the provision of goods and services by the licensee to
its customers and end users in the ordinary course of its business.

         2.8. "Legacy System" shall mean existing computer software, hardware or
firmware owned or used by GENUITY which was developed, licensed or obtained
outside the scope of any Technical Effort.

         2.9. A "Non-exclusive Statement of Work" shall mean a Statement of Work
that is not an Exclusive Statement of Work.

         2.10. "Object Code" shall mean the machine-executable version of a
computer software program.

         2.11. "Schedule" shall mean the timetable and milestones for completion
of a Technical Effort as set forth in its Statement of Work, as modified by any
Change Orders or otherwise as provided in this Agreement.

         2.12. "Services" shall mean those services provided by GTE to GENUITY
under the terms of this Agreement and the applicable Statement of Work.

         2.13. "Software" shall mean the computer software provided by GTE to
GENUITY in connection with a Technical Effort as provided in a Statement of Work
for the Technical Effort, provided that the foregoing shall exclude Third Party
Software.

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         2.14. "Source Code" shall mean the fully commented human-readable
version of a computer software program, including, without limitation, all
documentation necessary or useful to understand such software program.

         2.15. "Specifications" shall mean the functional and other
specifications for Software included in any Deliverables set forth in a
Statement of Work.

         2.16. "Statement of Work" shall mean a written description of a
Technical Effort signed by both parties and attached to this Agreement, pursuant
to Section 3.1. The Statement of Work for each Technical Effort shall include
all Change Orders that have been agreed upon for that Technical Effort.

         2.17. "Technical Effort" shall mean the technical services provided by
GTE pursuant to the terms and conditions of this Agreement and the applicable
Statement of Work.

         2.18. "Third Party Software" shall mean any version of any software
product, in Object Code only, that is developed or owned by a third party and is
distributed or otherwise made available to one party to the other pursuant to
this Agreement or required for use of Software provided as a Deliverable under
this Agreement.

3. Technical Effort.

         3.1. Technical Effort for Software Development. The parties may from
time to time agree upon a Technical Effort which calls for the development or
modification of computer programs. For each such development or modification of
computer programs, the Technical Effort shall be described in a Statement of
Work. Each Statement of Work shall contain a detailed description of the
Software to be developed or modified, including the Deliverables for the
Technical Effort, the Specifications, if any, for any Software or other
Deliverables to be developed, the Schedule, acceptance criteria, the amounts and
timing of payments to be made, any Services to be provided, and such other
information as may be required by this Agreement. Each Statement of Work will
expressly indicate if it is an Exclusive Statement of Work, and if it does not
so indicate it shall be deemed to be a Non-Exclusive Statement of Work. Each
Statement of Work shall be deemed a part of and shall be subject in all respects
to the terms and conditions of this Agreement, unless otherwise set forth in a
Statement of Work with specific reference to the terms or conditions of this
Agreement that are to be altered by such Statement of Work.

         3.2. Technical Effort for Other Technical Services. The parties may
from time to time agree upon a Technical Effort for technical services which are
other than the development or modification of computer programs. Each such
Technical Effort shall be described in a Statement of Work. Each Statement of
Work shall contain a detailed description of the Technical Effort, including,
without limitation, the Deliverables for the Technical Effort, the requirements
for Deliverables to be provided, if any, the Schedule, acceptance criteria (if
any), the amounts and timing of payments to be made, any Services to be
provided, and such other information as may be required by this Agreement. Each
Statement of Work will expressly indicate if it is an Exclusive Statement of
Work, and if it does not so indicate it shall be deemed to be a Non-Exclusive
Statement of Work. Each Statement of Work shall be deemed a part of and shall be
subject in all respects to the terms and conditions of this Agreement, unless
otherwise set forth in a Statement of Work with specific reference to the terms
or conditions of this Agreement that are to be altered by such Statement of Work

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         3.3. General Conduct of Technical Efforts. The parties acknowledge and
agree that the successful completion of each Technical Effort shall require the
cooperation of both parties. GTE shall endeavor to complete each Technical
Effort in accordance with the Schedule. GTE may, at its election, perform its
obligations under this Agreement either directly or through one or more
Affiliates, unless otherwise provided in a Statement of Work. GENUITY agrees to
provide such information and access to facilities, personnel and GENUITY Legacy
Systems, if applicable, as may be reasonably required or requested by GTE to
complete the Technical Effort. If GENUITY's acts or failures to act cause any
hindrance or delay in GTE's performance of the Technical Effort, the time for
GTE's performance under the Schedule shall be extended accordingly and GENUITY
shall pay GTE, at GTE's then current rates, for any additional time spent, and
reimburse GTE for any additional expenses incurred, as a result of such
hindrance or delay.

         3.4. Technical Effort Coordinators and Technical Effort Teams.

         (a) For each Technical Effort, each party shall specify one Technical
Effort Coordinator who shall be designated to act that party's contact person
relating to the over-all conduct of the Technical Effort.

         (b) Each party shall assign to the Technical Effort such personnel (its
"Technical Effort Team") and other resources as may be reasonably necessary to
complete the Technical Effort.

         (c) Either party shall be free to change the identity of the Technical
Effort Coordinator and Technical Effort Team members upon reasonable notice to
the other party.

         (d) The GENUITY Technical Effort Coordinator and such other personnel
as are necessary shall be available during the term of the Technical Effort to
provide to GTE promptly on request all information regarding the Technical
Effort and the Specifications, if applicable, that is reasonably necessary for
GTE's completion of the Technical Effort.

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         3.5. Progress Meetings. In the course of each Technical Effort, GTE and
GENUITY shall meet on a regular basis to review progress to date. The meetings
shall take place on or about the dates indicated in the Schedule, and in no
event less frequently than once each quarter-year. The meetings shall be
attended by each party's Technical Effort Coordinators and such other members of
their Technical Effort Teams as may be required adequately to assess the
progress of the Technical Effort, any technical or other difficulties that may
have been encountered, and to establish schedules and plans for its successful
completion

         3.6. Access to Legacy Systems. Promptly following execution of each
Statement of Work related to Legacy Systems, GENUITY shall, without charge,
provide to GTE copies of the Object Code and (to the extent required to perform
the relevant Statement of Work) Source Code for all GENUITY Legacy Systems with
which the Software to be developed under the Statement of Work must interact,
communicate with or that is in any other way required for the completion of the
Technical Effort, together with all user manuals and other documentation
relating to the Legacy Systems, unless such Legacy Systems are owned by GTE and
are only licensed to GENUITY pursuant to a separate software license agreement.
GENUITY shall also provide to GTE, free of charge, access to all computer
hardware and networks on which or within which the Legacy Systems operate to the
extent reasonably required to complete each Technical Effort. During the term of
this Agreement, GENUITY shall provide to GTE all updates, new releases and new
versions of the GENUITY Legacy Systems in the same form in which such was
originally provided, unless such updates, new releases and new versions are
provided by GTE. During the term of each Technical Effort, GENUITY shall provide
GTE (or cause to be provided to GTE), without charge, with all maintenance and
support services with respect to the Legacy Systems which subscribers to
maintenance and support services for such products receive generally, unless
such maintenance and support services are provided by GTE. With respect to any
Source Code owned by GENUITY and provided to GTE under this Agreement, GTE shall
use the Source Code for the Legacy Systems solely for the purpose of performing
GTE's obligations under the Statement of Work or Statements of Work for which
such Source Code is necessary, and shall not disclose, without GENUITY's prior
consent, such Source Code to anyone other than GTE and its Affiliates who are
performing services with respect to such Statement of Work.

         3.7. Inspection of Facilities. GTE shall advise GENUITY in writing of
the location of all facilities at which it is utilizing Source Code for the
GENUITY Legacy Systems. GENUITY may, from time to time, as it deems necessary,
at its sole risk and expense, enter such facilities, or any of them, and conduct
such inspection as is reasonably necessary to verify the nature of GTE's use of
such Source Code and GTE's compliance with its obligations with respect to the
confidentiality of such Source Code. GTE shall provide reasonable assistance to
GENUITY for such inspection, GENUITY shall minimize the amount of time that it
is required to spend in GTE's facilities, and GENUITY shall coordinate all such
activities with GTE so as not to unreasonably interfere with GTE's operations.

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         3.8. Specifications and Change Orders.

         (a) The Specifications for the Software to be developed during each
Technical Effort shall be as set forth in the Statement of Work for that
Technical Effort. No change in the Specifications shall be binding upon either
party unless it has been incorporated into a written Change Order signed by the
Technical Effort Coordinator for both parties.

         (b) If GENUITY wishes to change the Specifications for any Software, it
shall give GTE written notice of such request. GTE shall respond to such request
within thirty (30) days, including in its response any change in the Schedule,
amounts to be paid, Technical Effort Teams or other matters that may be required
by the proposed change. The parties shall thereupon negotiate in good faith for
a Change Order incorporating the changes in the Statement of Work required by
the requested changes. Either party may, however, decline in its discretion to
enter into any proposed Change Order.

         (c) In no event shall GENUITY or GTE be bound by any proposed change
unless and until it has signed a Change Order for such change, and the Statement
of Work for the Technical Effort shall remain in full force and effect, without
modification, until such Change Order has been agreed upon and signed.

4. Delivery and Acceptance Procedure.

         4.1. Delivery Period. GTE shall provide each Deliverable to GENUITY in
accordance with the Schedule for the relevant Technical Effort. All
Deliverables, if any, shall be provided in the form of Object Code, unless
otherwise specified in the Statement of Work, except GTE shall also provide
Source Code and Documentation for Deliverables to be owned by GENUITY under an
Exclusive Statement of Work. GTE shall also deliver Documentation for the
Software as may be required by the Statement of Work.

         4.2. Acceptance. The procedure for delivery and acceptance of
Deliverables by GENUITY, to the extent acceptance is contemplated by the
applicable Statement of Work and a procedure for such delivery and acceptance is
not otherwise provided therein, shall be in accordance with the following.

         (a) The Statement of Work shall specify the procedure and criteria, if
any, that GTE must meet in order for the Deliverables described in a Statement
of Work to be accepted by GENUITY. The Statement of Work shall also specify a
test plan, such other information as GTE and GENUITY mutually deem appropriate
and the period of time that GENUITY shall have to provide notice of acceptance
or rejection to GTE. However, failure to accept or reject such Deliverable
within the specified period of time or the commercial use of such item by or for
the benefit of GENUITY shall be deemed to be acceptance.

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         (b) If GENUITY rejects a Deliverable, it shall specify in reasonable
detail in writing the reasons for rejection and the requirements for revision.
If the notice of rejection is not sufficiently detailed to allow GTE to
determine why such Deliverable is unacceptable, GTE may request in writing that
GENUITY provide sufficient additional information, indicating the type of
additional information required by GTE. If GTE and GENUITY have joint
responsibility for the Deliverable and the Deliverable requires revision, GTE
shall assist GENUITY in making revisions necessary for the Deliverable to meet
the acceptance criteria within a period of time that is reasonable under the
circumstances. If GTE has sole responsibility for the Deliverable, then it shall
make the necessary revisions within a period of time that is reasonable under
the circumstances.

5. Payment.

         5.1. Payment. GENUITY shall pay the amounts that are charged to
GENUITY, and GTE shall invoice GENUITY, in accordance with the Statement of
Work. Each invoice shall reference this Agreement and the applicable Statement
of Work. The invoices shall be itemized to show the details as to all billed
items. Payments shall be made within thirty (30) days from the date of each
invoice.

         5.2. Taxes. In addition to any payments required by a Statement of
Work, GENUITY shall pay GTE an amount equal to any sales, use, privilege, gross
revenue, excise, or any other tax (except income and franchise taxes), as well
as any assessments or duties with respect to the Deliverables, Services and
other services, materials and rights provided by GTE hereunder lawfully levied
by a duly constituted governmental authority and for which GTE is required or
permitted, by law, to collect from GENUITY. In addition each party shall be
responsible for all real and personal property taxes imposed on software and
equipment owned by the respective parties on January 1 of every year; provided,
however, GENUITY shall be responsible for such real and personal property taxes
imposed upon any Deliverables provided to GENUITY. If GENUITY determines that
any Deliverables, Services and other services, materials and rights provided by
GTE hereunder are exempt from a tax, GENUITY must provide GTE a properly
completed exemption certificate, for each jurisdiction for which GENUITY is
claiming an exemption, before GTE will exclude the respective tax from amounts
charged to GENUITY. GENUITY shall not deduct any tax amount from remittances to
GTE until a properly completed exemption certificate, for all jurisdictions for
which GENUITY is claiming an exemption, has been provided to GTE.

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         5.3. Expenses. GENUITY shall reimburse GTE for reasonable expenses for
travel, meals and lodging incurred by them in the performance of its obligations
under this Agreement. Any such charges shall be in compliance with such GTE's
employee expense policies. There shall be no mark-up of such expense charges.
GTE shall maintain documentation of expenses incurred, and shall provide copies
of invoices of $100 or more upon GENUITY's request. GTE shall bill GENUITY
monthly for expenses as they accrue. The parties shall specify any limitation on
the reimbursement of expenses in the applicable Statement of Work. It is
acknowledged and agreed that if GTE is required to incur expenses beyond such
limitation in order to perform its obligations under the applicable Statement of
Work or under this Agreement, then GTE is excused from performing such
obligations until said expense limitation is removed or changed as mutually
agreed; provided, however, that GTE promptly notifies GENUITY of the need to
exceed the limitation.

         5.4. Records. GTE shall maintain complete and accurate records in a
form consistent with generally accepted accounting practices, to substantiate
any charges. GTE shall retain, and make available upon request, such records for
a period of three (3) years from the date of invoice for them. GENUITY and its
authorized agents, subject to obligations of confidentiality as set forth in
this Agreement, shall have access to such records upon prior written request
during normal business hours during the term of this Agreement and during the
respective periods in which GTE is required to maintain such records pursuant to
this Section 5.4. Access to the records shall be made at the location where such
records are normally maintained.

6. Intellectual Property.

         6.1. Ownership.

         (a) Subject to GENUITY'S payment in full and compliance with all other
terms and conditions of this Agreement, and except as may be otherwise set forth
in a Statement of Work, GTE agrees to (i) transfer to GENUITY all right, title
and interest in and all materials included in Deliverables that are first
created during the course of the performance of an Exclusive Statement of Work
(including, but not limited to, Software and Documentation), and any and all
Intellectual Property Rights therein; and (ii) grant to GENUITY a fully paid up,
royalty free license to use the portion of the Deliverables not covered by
subsection (i) immediately above, to the extent such portion is owned by GTE.
Without limiting the generality of the foregoing, GENUITY shall have the right,
without obligation to account to GTE, to market and distribute such
Deliverables.

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         (b) GTE shall have sole and exclusive ownership of all right, title and
interest in and to all Deliverables (including, but not limited to, Software and
Documentation) (i) not included in Section 6.1(a)(i) above or (ii) described in
all Non-Exclusive Statements of Work, any and all Intellectual Property Rights
in the foregoing, and all other services, materials, information and
Intellectual Property Rights first created in the course of, pursuant to or as a
result of the performance of any Statement of Work. Without limiting the
generality of the foregoing, GTE shall have the sole and exclusive right,
without obligation to account to GENUITY, to such Deliverables and other
services, materials and Intellectual Property Rights, including, but not limited
to, the sole and exclusive right to market and distribute the Deliverables,
Intellectual Property Rights and other services, materials and information,
subject only to the licenses granted herein to GENUITY pursuant to Section 6.2.

         6.2. Grant of Licenses by GTE for GTE-Owned Deliverables. Subject to
GENUITY's payment in full of all amounts owing pursuant to a Non-Exclusive
Statement of Work, GTE hereby grants to GENUITY a nonexclusive, fully paid up,
royalty free, non-sublicensable, nontransferrable license to use the GTE-owned
Deliverables described in all Non-Exclusive Statements of Work solely for
GENUITY's Internal Business Purposes. Except and to the extent expressly set
forth in the applicable Statement of Work to this Agreement, no maintenance and
support services will be provided pursuant to the Software License Agreement for
Software delivered and licensed pursuant to this Agreement. To the extent any
Third Party Software is provided by GTE to GENUITY pursuant to this Agreement,
the use and possession of such Third Party Software shall be pursuant to the
terms and conditions of this Agreement, unless a Third Party Software license
agreement is included with such Third Party Software, in which instance such
Third Party Software license agreement shall govern the use and possession of
such Third Party Software. The said license shall include the right to prepare
derivative works and shall also include the right, to the extent that GTE cannot
perform such services on a commercially reasonable basis, and subject to GTE's
prior written approval, which shall not be unreasonably withheld, to engage
third parties for the purpose of enhancing or supporting the Deliverables. The
license granted pursuant to this Section 6.2 shall extend to GENUITY's
Affiliates, provided that such Affiliates agree to be bound by the terms and
conditions of this Agreement, but shall not otherwise include any right to
sublicense. The license provided by this Section 6.2 is in addition to, and
shall not be construed as limiting or expanding in any way, any other licenses
that GTE has granted or will grant to GENUITY under GTE Intellectual Property
Rights.

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         6.3. Grant of Licenses by GENUITY.

         (a) Grant of Licenses by GENUITY for Deliverables under Exclusive
Statements of Work. Except as otherwise set forth in any Statement of Work,
GENUITY hereby grants to GTE a fully paid up, perpetual, royalty-free, worldwide
license, with no right to grant sublicenses, to use the Deliverables described
in all Exclusive Statements of Work, to the extent GENUITY owns such
Deliverables, for the Internal Business Purposes of GTE. The license granted
pursuant to this Section 6.3(a) shall extend to GTE's Affiliates, provided that
such Affiliates agree to be bound by the terms and conditions of this Agreement,
but shall not otherwise include any right to sublicense. The said license shall
include the right to prepare derivative works and shall also include the right
to engage third parties for the purpose of enhancing or supporting the
Deliverables.

         (b) GENUITY hereby grants to GTE a fully paid up, royalty-free license
under any Intellectual Property Right of GENUITY solely to the extent that such
license is necessary to perform one or more Statements of Work under this
Agreement. This license shall terminate upon acceptance of each Deliverable as
to which this license is granted.

         6.4. No Implied Licenses. Except and to the extent set forth in
Sections 6.2 and 6.3, nothing contained herein shall be construed as granting
any right or license is to any party, by implication, estoppel or otherwise,
under any Intellectual Property Rights of any other party.

         6.5. Notice of Infringement Claims. Each party shall use its best
efforts to give the other party prompt written notice following receipt of any
claim that any Deliverable infringes the Intellectual Property right of any
third party.

         6.6. Marking. Each party shall include the other's patent, copyright
and proprietary rights notices on any copies such party makes of the Software,
Documentation or related materials which belong to the other party.

7. Confidentiality.

         7.1. Confidentiality. In the course of requesting and performing any
Statement of Work and other obligations hereunder, each party may receive or
acquire from the other information or data pertaining to specifications,
drawings, sketches, models, samples, computer programs, methods, concepts,
know-how, techniques, processes, and other technical or business information
that the other party desires to protect against unauthorized use or further
disclosure. Unless otherwise expressly set forth in a Statement of Work, for
purposes of this Agreement, "Confidential Information" shall mean: (i) any
information in written, other tangible or electronic form which is labeled by
the disclosing party as "confidential", "proprietary" or with a legend of
similar import; (ii) software in any form (including related documentation),
whether or not labeled in accordance with the preceding; (iii) Deliverables
provided pursuant to this Agreement, with the ownership of, proprietary interest
therein and Intellectual Property Rights therein being retained by the party
owning such Deliverables under the terms and conditions of this Agreement. Each
party shall remain the exclusive owner of its Confidential Information.

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         7.2. Use of Confidential Information. The Confidential Information of
the disclosing party may be used by the receiving party only for the performance
or use of Deliverables and Services under this Agreement and may only be
disclosed to those employees, subcontractors or agents of the receiving party
who have a need to know in order to perform or use the Deliverables and Services
under this Agreement; provided, however, that neither party shall disclose any
Confidential Information of the other party to a person who is not an Affiliate
of the disclosing party without the prior approval of the other party, which
approval shall not be unreasonably withheld. Except and to the extent set forth
in Section 7.3, the receiving party may not disclose Confidential Information of
the other party to any other person, entity, or the public without the prior
written consent of the disclosing party; provided, however, that such
Confidential Information may be disclosed by the receiving party without the
necessity of prior written consent, to the receiving party's subcontractors,
employees or consultants who require access to such Confidential Information to
perform or use the Deliverables and Services under this Agreement, provided such
persons have entered into written agreements which contain obligations of
nondisclosure and nonuse no less restrictive than set forth in this Section 7.2.
It is agreed that such written agreements shall be enforceable by the disclosing
party.

         7.3. Exceptions. The obligations in Section 7.2 shall not apply to that
portion of any information received from the disclosing party which is: lawfully
in the receiving party's possession, with no restriction on use or disclosure,
prior to its acquisition from the disclosing party; received in good faith by
the receiving party, with no restrictions on use or disclosure, from a third
party not subject to any confidential obligation to the disclosing party; now or
later becomes publicly known through no breach of confidential obligation by the
receiving party; released by the disclosing party to any other person, firm or
entity (including governmental agencies or bureaus) without restriction on use
or disclosure; or independently developed by or for the receiving party without
any reliance on or use of Confidential Information of the disclosing party. The
foregoing exceptions shall not apply to Software in any form.

         7.4. Disclosure and Notification. If a receiving party receives a
request to disclose any Confidential Information of the disclosing party
(whether pursuant to a valid and effective subpoena, an order issued by a court
or other governmental authority of competent jurisdiction or otherwise) on
advice of legal counsel that disclosure is required under applicable law, the
receiving party agrees that, prior to disclosing any Confidential Information of
the disclosing party, it shall (i) notify the disclosing party of the existence
and terms of such request or advice, (ii) cooperate with the disclosing party in
taking legally available steps to resist or narrow any such request or to
otherwise eliminate the need for such disclosure at the disclosing party's sole
expense, if requested to do so by the disclosing party, and (iii) if disclosure
is required, it shall be the obligation of the disclosing party to use its best
efforts to obtain a protective order or other reliable assurance that
confidential treatment shall be afforded to such portion of the Confidential
Information of the disclosing party as is required to be disclosed.

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         7.5. Continuing Obligation. The obligation of non-disclosure and
non-use with respect to Confidential Information of the disclosing party shall
survive termination of this Agreement and shall continue for a period of five
(5) years thereafter; provided, however, that the obligations of non-disclosure
and non-use shall continue in perpetuity for Software in any form.

8. Warranties and Warranty Disclaimer.

         8.1. Express Representations and Warranties. GTE represents, warrants,
and covenants to GENUITY that:

                  (a) In performing the Services set forth in any Statement of
         Work, GTE shall comply with all applicable laws, codes, ordinances,
         orders, rules and regulations of local, state, and federal governments
         and agencies and instrumentalities, including, but not limited to,
         applicable wage and hour, safety and environmental laws, and all
         standards and regulations of appropriate regulatory commissions and
         similar agencies.

                  (b) All Services furnished by GTE in accordance with a
         Statement of Work shall be performed by qualified personnel at a level
         of professional performance standard within the industry in which the
         Services are provided.

         8.2. Disclaimer. THE WARRANTIES IN THIS SECTION 8 AND ANY WARRANTY IN A
STATEMENT OF WORK, BUT ONLY IF SPECIFICALLY IDENTIFIED AS AN EXPRESS WARRANTY IN
SUCH STATEMENT OF WORK, ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
OR WHETHER ARISING BY COURSE OF DEALING OR PERFORMANCE, CUSTOM, USAGE IN THE
TRADE OR PROFESSION OR OTHERWISE, INCLUDING BUT NOT LIMITED TO, IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR WARRANTIES
AGAINST INFRINGEMENT. GTE MAKES NO WARRANTIES REGARDING THE DELIVERABLES,
INCLUDING, WITHOUT LIMITATION, SOFTWARE, OR SERVICES TO BE PROVIDED HEREUNDER,
EXPRESS, IMPLIED OR ARISING BY CUSTOM OR TRADE USAGE, AND SPECIFICALLY DISCLAIMS
THE IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
PARTICULAR PURPOSE. Except for the warranties expressly set forth in this
Section 8 and any Statement of Work, GENUITY acknowledges and agrees that it has
relied on no other representations or warranties and that no other
representations or warranties have formed the basis of its bargain hereunder

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         8.3. Survival. All representations, warranties and covenants of GTE
contained in this Section 8 shall continue for the term of this Agreement and
shall survive its termination.

9. Indemnification.

         9.1. Indemnity for Infringement of Third Party Intellectual Property.

         (a) Indemnity regarding Deliverables provided under Exclusive
Statements of Work. If a Deliverable under an Exclusive Statement of Work become
the subject of an infringement claim, or in GTE's opinion is likely to become
the subject of such a claim, then, in addition to defending the claim and paying
any damages and attorneys' fees finally awarded by a court of final
jurisdiction, GTE may, at its option and in its sole discretion, and at its own
cost and expense: (i) replace or modify such Deliverable to make it
noninfringing or cure any claimed misuse of any third party trade secret; (ii)
procure for GENUITY the right to continue using such Deliverable pursuant to
this Agreement; or (iii) require GENUITY to cease using and return such
Deliverable upon a Markman determination that the patent claims on which an
action has been brought are afforded a construction which outside counsel for
GTE reasonably believes reads on the Deliverable or a decision of infringement,
whichever is earlier, in which case GTE shall refund to GENUITY a pro-rata
portion of the amount actually paid to GTE by GENUITY for such Deliverable.
Notwithstanding the foregoing, if GTE exercises its right to require the return
of such Deliverable, to the extent permitted by applicable law, GENUITY may
retain and continue to use such Deliverable to the extent GENUITY agrees in
writing to defend and indemnify GTE for any and all expenses, costs and
liabilities associated with such continued possession and use of such
Deliverable.

         (b) Indemnity regarding Deliverable provided under Non-Exclusive
Statements of Work. If a Deliverable under a Non-Exclusive Statement of Work
become the subject of an infringement claim, or in GTE's opinion is likely to
become the subject of such a claim, then, in addition to defending the claim and
paying any damages and attorneys' fees finally awarded by a court of final
jurisdiction, GTE may, at its option and in its sole discretion, and at its own
cost and expense: (i) replace or modify such Deliverable to make it
noninfringing or cure any claimed misuse of any third party trade secret; (ii)
procure for GENUITY the right to continue using such Deliverable pursuant to
this Agreement; or (iii) require the return of such Deliverable and terminate
GENUITY's right to use the same and refund to GENUITY a pro-rata portion of the
amount actually paid to GTE by GENUITY for such Deliverable. Notwithstanding the
foregoing, if GTE exercises its right to require the return of such Deliverable
and terminates GENUITY's right to use the same, to the extent permitted by
applicable law, GENUITY may retain and continue to use such Deliverable to the
extent GENUITY agrees in writing to defend and indemnify GTE for any and all
expenses, costs and liabilities associated with such continued possession and
use of such Deliverable.

                                       13
<PAGE>

         (c) Limitations. GTE shall not be liable to GENUITY for any claims of
inducement to infringe or contributory infringement or claims of infringement
resulting from the combination of the Deliverable with the products or services
of third parties. Further, GTE shall have no liability to GENUITY hereunder if
(i) the claim of infringement is based upon the use or other exploitation of
Deliverable provided by GTE hereunder in connection or in combination with
equipment, devices, data or software not supplied by GTE, and such infringement
would not have occurred but for such use; (ii) such Deliverable is used outside
of the scope of the rights and licenses granted to GENUITY or in a manner for
which the Deliverable was not designed; (iii) the Deliverable or any portion
thereof is modified by or for GENUITY (even by GTE at GENUITY's direction or
instructions), and such infringement would not have occurred but for such
modification; (iv) GENUITY uses the Deliverable as part of a patented process
and there would be no infringement in the use of the Deliverable alone; or (v)
the infringement is the necessary result of GTE's compliance with specifications
or written instructions provided by GENUITY to GTE, misuse of a third party's
Confidential Information provided by GENUITY to GTE or use of Legacy Systems
provided by GENUITY to GTE . For all of the foregoing exclusions, GENUITY shall
defend and indemnify GTE for any infringement claims to the extent set forth in
Section 9.1(a).

         (d) The foregoing sets forth GTE's sole and exclusive obligations, and
GENUITY's sole remedies, for infringement of any Intellectual Property Rights by
any Deliverables under any Statement of Work.

         9.2. General. GTE and GENUITY, to the fullest extent permitted by law,
each shall defend, indemnify and hold harmless the other and its Affiliates,
officers, agents and employees from any and all amounts payable under any
judgment, verdict, court order or settlement (and associated fees and
disbursements of counsel) arising from or related to any third-party claims for
injury, sickness, disease or death of any person or damage to any real or
tangible personal property or assets to the extent arising from the indemnitor's
(either directly or through its officers, agents, subcontractors or
representatives) negligence or willful misconduct in the performance of this
Agreement; provided, however, that if a claim is the result of the joint
negligence or joint willful misconduct of GTE and GENUITY, the amount of the
claim for which each party is entitled to indemnification shall be limited to
that portion of such claim that is attributable to the negligence or willful
misconduct of the indemnifying party. The parties agree that the payments
required by any Statement of Work provided under this Agreement includes
consideration for the obligation to indemnify as set out in this Section 9.

                                       14
<PAGE>

         9.3. Losses. GENUITY and GTE each shall be responsible for any and all
claims, actions, damages, liabilities, costs and expenses, including reasonable
attorneys' fees and expenses (collectively, "Losses"), to their respective
tangible personal or real property (whether owned or leased), and each party
agrees to look only to its own insuring arrangements (if any) with respect to
such Losses. Subject to the procedures set forth below, each party shall
indemnify, defend and hold the other party harmless from any and all Losses
arising out of, under or in connection with claims for which the indemnitor is
responsible under the preceding sentence.

         9.4. Waivers. GENUITY and GTE waive all rights to recover against each
other for any Loss to their respective tangible personal property (whether owned
or leased) from any cause covered by insurance maintained by each of them,
including their respective deductibles or self-insured retentions. GENUITY and
GTE shall cause their respective insurers to issue appropriate waivers of
subrogation rights endorsements to all property insurance policies maintained by
each party. Each party shall give the other written notice if a waiver of
subrogation is unobtainable or obtainable only at additional expense. If the
party receiving such notice agrees to reimburse the other party for such
additional expense, the other party shall obtain such waiver of subrogation. If
a waiver is unobtainable or if a party elects not to pay the additional expense
of a waiver, then neither party nor their insurers shall waive such subrogation
rights.

         9.5. Conditions. The indemnification obligations set forth in this
section shall not apply unless the party claiming indemnification: (i) uses its
best efforts to notify the other promptly in writing, of any matters in respect
of which the indemnity may apply and of which the notifying party has knowledge,
in order to allow the indemnitor the opportunity to investigate and defend the
matter; provided, however, that the failure to so notify shall only relieve the
indemnitor of its obligations under this Section 9 if and to the extent that the
indemnitor is prejudiced thereby; and (ii) gives the other party full control of
the response thereto and the defense thereof, including any agreement relating
to the settlement thereof; provided, however, that the indemnitee shall have the
right to participate, on a non-interfering basis, in any legal proceeding to
contest and defend a claim for indemnification involving a third party and to be
represented by legal counsel of its choosing, all at the indemnitee's sole cost
and expense. However, if the indemnitor fails to promptly assume the defense of
the claim, the party entitled to indemnification may assume the defense at the
indemnitor's cost and expense. The indemnitor shall not be responsible for any
settlement or compromise made without its prior written consent, unless the
indemnitee has tendered notice and the indemnitor has then refused to assume and
defend the claim and it is later determined that the indemnitor was obligated to
assume and defend the claim. The indemnitee agrees to cooperate in good faith
with the indemnitor at the request and expense of the indemnitor.

                                       15
<PAGE>

10. Limitations on Liability.

         10.1. General. A party's and its Affiliates' liability arising out of
or relating to a Statement of Work and this Agreement, including without
limitation on account of performance or nonperformance of obligations hereunder,
regardless of the form of the cause of action, whether in contract, tort
(including without limitation negligence), statute or otherwise, shall in no
event exceed the lesser of (i) the price to be paid to GTE for the completed
Statement of Work as set forth thereon; or (ii) the amount actually paid by
GENUITY to GTE for the particular Statement of Work from which the claim arises.
The limitation in the immediately preceding sentence does not apply to a party's
obligations under the section entitled Indemnification and Confidential
Information or other breaches related to Intellectual Property Rights.

         10.2. Limitation. EXCEPT FOR BREACHES RELATED TO CONFIDENTIAL
INFORMATION OR INTELLECTUAL PROPERTY RIGHTS, NEITHER PARTY SHALL BE LIABLE TO
THE OTHER FOR ANY INDIRECT, INCIDENTAL, PUNITIVE, EXEMPLARY, SPECIAL OR
CONSEQUENTIAL DAMAGE OR LOST PROFITS OF ANY KIND WHATSOEVER EVEN IF A PARTY OR
ITS AFFILIATES HAVE BEEN APPRISED OF THE LIKELIHOOD OF SUCH DAMAGES OCCURRING.

11. Term.

         11.1. Term. This Agreement is effective as of the Effective Date and
shall continue in effect for an initial term of one (1) year ("Initial Term") or
for such other term as may be set out in a Statement of Work for each Technical
Effort; provided, however, that any extension of the Term provided in any
Statement of Work shall apply solely to such Statement of Work and shall not
extend the Term of this Agreement generally. Following the completion of the
Initial Term, this Agreement may be renewed upon mutual agreement of the parties
for successive renewal terms ("Renewal Terms") of one (1) year. A party that
wishes to renew the Agreement shall notify the other no later than ninety (90)
days prior to the end of the then current term. If the parties do not reach
agreement on renewal at least sixty (60) days prior to the end of such term, the
Agreement shall terminate at the end of that term, provided that the term of any
Statement of Work shall continue until such term expires.

         11.2. Termination Events. Either party may terminate or cancel this
Agreement or any Statement of Work, effective immediately, upon written notice
to the other party, if any of the following events occur:

                  (a) The other files a voluntary petition in bankruptcy (other
         than as creditor).

                  (b) The other is adjudged bankrupt.

                                       16
<PAGE>

                  (c) A court assumes jurisdiction of the assets of the other
         under a federal reorganization act.

                  (d) A trustee or receiver is appointed by a court for all or a
         substantial portion of the assets of the other.

                  (e) The other becomes insolvent or suspends its business.

                  (f) The other makes an assignment of its assets for the
         benefit of its creditors except as required in the ordinary course of
         business.

         11.3. Termination for Breach. Either party may terminate or cancel this
Agreement or a Statement of Work, for a material breach or default of any of the
terms, conditions or covenants of this Agreement by the other, provided that
such termination or cancellation may be made only following the expiration of a
thirty (30) day period during which the other party has failed to cure such
breach after having been given written notice of such breach.

         11.4. Termination for Convenience. GENUITY may terminate any Statement
of Work, or this Agreement in its entirety, at any time upon written notice to
GTE. In such event, GENUITY shall pay GTE for all work performed up to the date
of termination, and for all supplies and other resources, including third party
licenses, that GTE has obtained or committed to the completion of the relevant
Statement of Work and that cannot reasonably be re-assigned or otherwise
utilized by GTE on other matters.

         11.5. Termination by Mutual Consent. The parties may at any time
terminate any Statement of Work, or this Agreement in its entirety, by mutual
consent. In such event, GENUITY shall pay GTE for all work performed up to the
date of termination, and for all supplies and other resources, including third
party licenses, that GTE has obtained or committed to the completion of the
relevant Statement of Work and that cannot reasonably be re-assigned or
otherwise utilized by GTE on other matters.

         11.6. Effect of Termination.

         (a) No expiration, termination or cancellation of this Agreement, in
whole or in part, shall relieve GENUITY of any obligation to pay amounts due nor
affect any other rights or liabilities of the parties which may have accrued
prior to the date of expiration, termination or cancellation.

         (b) In no event shall any license granted to GENUITY hereunder (or any
license grant made by reference to the Software License Agreement) survive
expiration, termination or cancellation unless and until Internetworking has
paid in full for the Deliverables to which such license relates.

                                       17
<PAGE>

         (c) Notwithstanding anything herein to the contrary, and in addition to
any provisions of Statement of Work that expressly survive expiration,
termination or cancellation of this Agreement, upon any expiration or
termination of this Agreement, the provisions of Sections 5, 6, 7, 8.2, 8.3, 9,
10, 11.6 and 12 of this Agreement shall survive such expiration, termination or
cancellation and shall continue in full force and effect.

12. Dispute Resolution.

         12.1. General. Any controversy or claim arising out of or relating to
this Agreement, or the breach thereof, shall be settled first, by good faith
efforts of the parties to reach mutual agreement, and second, if mutual
agreement is not reached to resolve the dispute, by final, binding arbitration
as set out in Section 12.3 below.

         12.2. Initial Resolution. A party that wishes to initiate the dispute
resolution process shall send written notice to the other party with a summary
of the controversy and a request to initiate these dispute resolution
procedures. Each party shall appoint a knowledgeable, responsible representative
from the company who has the authority to settle the dispute, to meet and
negotiate in good faith to resolve the dispute. The discussions shall be left to
the discretion of the representatives, who may utilize other alternative dispute
resolution procedures such as mediation to assist in the negotiations.
Discussions and correspondence among the representatives for purposes of these
negotiations shall be treated as Confidential Information developed for purposes
of settlement, shall be exempt from discovery and production, and shall not be
admissible in the arbitration described above or in any lawsuit pursuant to Rule
408 of the Federal Rules of Evidence. Documents identified in or provided with
such communications, which are not prepared for purposes of the negotiations,
are not so exempted and may, if otherwise admissible, be admitted in evidence in
the arbitration or lawsuit. The parties agree to pursue resolution under this
subsection for a minimum of 60 days before requesting arbitration.

         12.3. Arbitration. If the dispute is not resolved under the preceding
subsection within 60 days of the initial written notice, and the dispute does
not relate to Intellectual Property Rights, either party may demand arbitration
by sending written notice to the other party. The parties shall promptly submit
the dispute to the American Arbitration Association for resolution by a single
neutral arbitrator acceptable to both parties, as selected under the rules of
the American Arbitration Association. The dispute shall then be administered
according to the American Arbitration Association's Commercial Arbitration
Rules, with the following modifications: (i) the arbitration shall be held in a
location mutually acceptable to the parties, and if the parties do not agree,
the location shall be New York City; (ii) the arbitrator shall be licensed to
practice law; (iii) the arbitrator shall conduct the arbitration as if it were a
bench trial and shall use, apply and enforce the Federal Rules of Evidence and
Federal Rules of Civil Procedure; (iv) except for breaches related to
Confidential Information or intellectual property, the arbitrator shall have no
power or authority to make any award that provides for consequential, punitive
or exemplary damages; (v) the arbitrator shall control the scheduling so that
the hearing is completed no later than 60 days after the date of the demand for
arbitration; and (vi) the arbitrator's decision shall be given within 5 days
thereafter in summary form that states the award, without written decision,
which shall follow the plain meaning of this Agreement, the relevant documents,
and the intent of the parties. Judgment on the award rendered by the arbitrator
may be entered in any court having jurisdiction over the parties. Each party to
the dispute shall bear its own expenses arising out of the arbitration, except
that the expenses of the facilities to conduct the arbitration and the fees of
the arbitrator shall be shared equally by the parties.

                                       18
<PAGE>

         12.4. Injunctive Relief. The foregoing notwithstanding, each party
shall have the right to seek injunctive relief in an applicable court of law or
equity pending resolution of the dispute in accordance with the foregoing.

13. General.

         13.1. Notice. Any written notice either party may give the other
concerning the subject matter of this Agreement shall be in writing and given or
made by means that obtain a written acknowledgment of receipt. Notices shall be
sent to the parties at the following addresses, which may be changed by written
notice:

                                  To GTE:
                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                              To GENUITY:
                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

        Notice shall be deemed to have been given or made when actually
received, as evidenced by written acknowledgment of receipt.

                                       19
<PAGE>

         13.2. Compliance. GTE and GENUITY shall each comply with the provisions
of all applicable federal, state, and local laws, ordinances, regulations and
codes (including, without limitation, procurement of required permits or
certificates) in fulfillment of their obligations under this Agreement. GTE
Products and Services are subject to U.S. export and foreign transactions
control regulations. Each party undertakes that it shall neither export, nor
cause nor permit to be exported, without the other party's prior written consent
and without compliance with applicable law and regulation, the other party's
products or services out of the United States of America, nor shall such
products or services be made available, directly or indirectly, for use in any
project associated with the design, development, production, testing,
stockpiling or use of: (i) nuclear weapons or facilities to produce nuclear
explosives, (ii) missiles, or (iii) chemical or biological warfare agents. Each
party agrees to comply with all applicable laws and regulations relating to the
exportation of technical information, as they currently exist and as they may be
amended from time to time.

         13.3. Assignment, Subcontracting.

         (a) Neither this Agreement nor any rights or obligations hereunder
shall be assignable by either of the parties hereto; provided, however, that GTE
may delegate all or any portion of its obligations under this Agreement to one
or more of its Affiliates or may assign this Agreement to any Affiliate.

         (b) GTE may use subcontractors to perform its obligations under this
Agreement. GTE shall be responsible for the fulfillment of its obligations
hereunder, notwithstanding the performance of such obligations by its
subcontractors.

         13.4. Waiver of Terms and Conditions. Failure to enforce any of the
terms or conditions of this Agreement shall not constitute a waiver of any such
terms or conditions, or of any other terms or conditions.

         13.5. Severability. Where any provision of this Agreement is declared
invalid, illegal, void or unenforceable, or any changes or modifications are
required by regulatory or judicial action, and any such invalid, illegal, void
or unenforecable provision, or such change or modification, substantially
affects any material obligation of a party hereto, the remaining provisions of
this Agreement shall remain in effect and the parties shall mutually agree upon
a course of action with respect to such invalid provision or such change or
modification to the end that the purposes of this Agreement are carried out.

         13.6. Governing Law. This Agreement, and the rights and obligations
contained in it, shall be governed by and construed in accordance with the laws
of the State of New York, without regard to any conflicts of law principles that
would require the application of the laws of any other jurisdiction.

         13.7. No Unreasonable Delay or Withholding. Where agreement, approval,
acceptance, consent or similar action by GENUITY or GTE is required, such action
shall not be unreasonably delayed or withheld.

                                       20
<PAGE>

         13.8. Force Majeure. If performance of any obligations by either party
under this Agreement (other than any obligation of either party to pay money
hereunder) is prevented, restricted or interfered with by reason of acts of God,
wars, revolution, civil commotion, acts of public enemy, embargo, acts of
government in its sovereign capacity, labor difficulties, including, without
limitation, strikes, slowdowns, picketing or boycotts, communication line
failures, power failures, or any other circumstances beyond the reasonable
control and not involving any fault or negligence of the party affected, the
party affected, upon giving prompt notice to the other party, shall be excused
from such performance on a day-to-day basis during the continuance of such
prevention, restriction or interference (and the other party shall likewise be
excused, on a day-to-day basis during the same period, from performance of its
obligations which are dependent upon or affected by such nonperformance);
provided, however, that the party so affected shall use its best reasonable
efforts to avoid or remove such causes of nonperformance and both parties shall
proceed immediately with the performance of their obligations under this
Agreement whenever such causes are removed or cease.

         13.9. Entire Agreement. This Agreement represents the entire
understanding between the parties with the respect to its provisions and cancels
and supercedes all prior agreements or understandings, whether written or oral,
with respect to the subject matter. This Agreement may only be modified or
amended by an instrument in writing signed by duly authorized representatives of
the parties. This Agreement shall be deemed to include all Schedules issued
hereunder.

         IN WITNESS WHEREOF, the parties hereto have executed this Agreement on
the ___ day of ___________, 2000 (the "Effective Date") through their authorized
representatives.

GTE SERVICE CORPORATION                   GENUITY INC.

By:                                       By:
       ------------------------------            ------------------------------

Name:                                     Name:
       ------------------------------            ------------------------------

Title:                                    Title:
       ------------------------------            ------------------------------

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

                                       21<PAGE>

                                                                   EXHIBIT 10.14

           INTELLECTUAL PROPERTY OWNERSHIP AND CROSS LICENSE AGREEMENT

         THIS INTELLECTUAL PROPERTY OWNERSHIP AND CROSS LICENSE AGREEMENT
("Agreement") effective as of ___________, 2000 (the "Effective Date"), is made
between GTE Service Corporation, a New York corporation, with offices for this
Agreement at 1255 Corporate Drive, Irving, Texas 75038, and its Affiliates
("GTE") on the one hand, each only with respect to their respective obligations
hereunder, and Genuity Inc., a Delaware corporation, with offices for this
Agreement at 3 Van de Graaff Drive, Burlington, Massachusetts 01803 ("GENUITY")
on the other hand.

     WHEREAS, GENUITY and GTE by this Agreement apportion between them the
ownership, by mutual agreement, of existing patents and patent applications,
agree to joint ownership of existing non-statutory intellectual property
(excluding previously licensed software) due to the inability to identify,
segregate and apportion such existing non-statutory intellectual property
between them, and grant each other a non-exclusive, royalty-free license under
existing patents and patent applications each party owns.

     Now, therefore, in mutual consideration of the promises and obligations set
forth below, the parties agree as follows:

1. General.

        GTE and GENUITY desire to establish a contractual relationship that will
(i) define the ownership of certain intellectual property rights as between
GENUITY and GTE, and (ii) grant GENUITY and GTE certain licenses and other
rights in and to intellectual property rights owned by the other party, all in
accordance with the terms and conditions set forth in this Agreement.

2. Definitions.

        For purposes of this Agreement, and in addition to certain terms defined
on first use herein and in any schedule attached hereto, the following terms
shall have the following meanings.

         2.1. "Affiliate" shall mean an entity that controls, is under common
control with, or that is controlled by, the entity with which it is affiliated.

                                       1
<PAGE>

         2.2. "Confidential Information" shall mean (i) all ideas and
information of any kind, including, without limitation, technology, know-how,
technical data, products, software, works of authorship, assets, operations,
contractual relationships, business plans or any other aspect of either party's
business, in written, other tangible or electronic form provided by one party
(the "disclosing party") to the other party ("the receiving party") which is
labeled by the disclosing party as "confidential", "proprietary" or with a
legend of similar import; (ii) software in any form (including, without
limitation, related documentation), whether or not labeled in accordance with
the preceding; (iii) Non-Statutory Intellectual Property obtained from the
disclosing party; and (iv) information orally disclosed and identified as
confidential at the time of such disclosure which is summarized in writing
within thirty (30) days of such disclosure. Confidential Information shall not,
however, include any information that (a) lawfully in the receiving party's
possession, with no restriction on use or disclosure, prior to its acquisition
from the disclosing party; (b) received in good faith by the receiving party,
with no restrictions on use or disclosure, from a third party not subject to any
confidential obligation to the disclosing party; (c) now or later becomes
publicly known through no breach of confidential obligation by the receiving
party; (d) released by the disclosing party to any other person, firm or entity
(including, without limitation, governmental agencies or bureaus) without
restriction on use or disclosure; or (e) independently developed by or for the
receiving party without any reliance on or use of Confidential Information of
the disclosing party. The foregoing exceptions shall not apply to software in
any form.

         2.3. "Existing Patents", shall mean (i) the patents, patent
applications and Invention Disclosures (together with any patents issuing on the
foregoing patent applications and Invention Disclosures, divisions,
continuations or continuations-in-part thereof; patents, patent extensions,
certificates of invention, reissues, renewals and additions thereof) listed on
Schedule 2.3A to this Agreement; (ii) the patents, patent applications and
Invention Disclosures (together with any patents issuing on the foregoing patent
applications and Invention Disclosures, divisions, continuations or
continuations-in-part thereof; patents, patent extensions, certificates of
invention, reissues, renewals and additions thereof) listed on Schedule 2.3B to
this Agreement; and (iii) all other patents and patent applications (together
with any patents issuing on the foregoing patent applications, divisions,
continuations or continuations-in-part thereof; patents, patent extensions,
certificates of invention, reissues, renewals and additions thereof) existing as
of the Effective Date and owned by GTE or any Affiliate of GTE (including,
without limitation, GENUITY; but excluding, however, any Affiliate of GTE
resulting from a merger of GTE with a third party at any time after March 17,
2000.

         2.4. "Intellectual Property Rights" shall mean Existing Patents and
Jointly Owned Non-Statutory Intellectual Property.

         2.5. "Invention Disclosure" shall mean a disclosure, in written or
electronic form, of subject matter which is intended to be the subject of one or
more patent applications and was prepared in conformance with the internal
policies of a party hereto.

         2.6. "Jointly-Owned Non-Statutory Intellectual Property" shall mean all
Non-Statutory Intellectual Property existing and owned by either or both parties
hereto or any of their Affiliates as of the Effective Date, but excluding any
Previously Licensed Non-Statutory Intellectual Property and also excluding all
Non-Statutory Intellectual Property owned by an Affiliate of GTE resulting from
the merger of GTE with a third party after March 17, 2000.

                                       2
<PAGE>

         2.7. "Non-Statutory Intellectual Property" shall mean all unpatented
inventions (whether or not patentable), trade secrets, know-how and proprietary
information, including but not limited to (in whatever form or medium),
discoveries, ideas, compositions, formulae, computer programs (including,
without limitation, source and object codes and documentation, but excluding
Software, Documentation and other intellectual property licensed by either party
hereto to the other pursuant to a Software License Agreement (as those
capitalized terms are defined therein)), databases, drawings, designs, plans,
proposals, specifications, photographs, samples, models, processes, procedures,
data, information, manuals, reports, financial, marketing and business data,
pricing and costing information, correspondence and notes to the extent owned by
either party hereto as of the Effective Date; provided, however, the foregoing
shall not include any Third Party Intellectual Property Rights or any
copyrights, trademarks, service marks, corporate names, domain names or
applications for any of the foregoing.

         2.8. "Other Existing Intellectual Property" shall mean all copyrights,
trademarks, service marks, corporate names, domain names or applications for any
of the foregoing existing as of the Effective Date and owned as of the Effective
Date by a party hereto.

         2.9. "Other Intellectual Property" shall mean all copyrights,
trademarks, service marks, corporate names, domain names or applications for any
of the foregoing developed, created or acquired from a third party after the
Effective Date which are owned by a party hereto.

         2.10. "Previously Licensed Non-Statutory Intellectual Property" shall
mean that portion of Non-Statutory Intellectual Property which exists and is
owned by one party hereto (or its Affiliates) as of the Effective Date and is
licensed to the other party hereto (or its Affiliates) pursuant to a separate
written agreement, including, without limitation, the Software License Agreement
(as defined hereinbelow), effective on or before the Effective Date.

         2.11. "Software License Agreement" shall mean that certain Software
License Agreement among the parties of even date herewith.

         2.12. "Third Party Intellectual Property" shall mean any patents,
copyrights, software trade secrets, trademarks, service marks, proprietary
information and other intellectual property, in any form, that is owned by a
third party and is required or useful for the exercise of any rights or licenses
in Intellectual Property Rights conveyed or granted pursuant to this Agreement.

                                       3
<PAGE>

3. Ownership.

         3.1. Existing Patents. On the terms and subject to the conditions set
forth herein and subject to rights and licenses granted to third parties on or
before the Effective Date, the ownership of all right, title and interest in and
to the Existing Patents as of and after the Effective Date shall be apportioned
as follows and each party hereto agrees to execute such documents of assignment
and to take such other actions as may be required to effect the following:

                  (a) The Existing Patents listed on Schedule 2.3A hereto shall
         be owned exclusively by GENUITY;

                  (b) The Existing Patents listed on Schedule 2.3B hereto shall
         be jointly owned by GENUITY and GTE, with neither party being obligated
         to account to the other therefor; and

                  (c) All other Existing Patents shall be owned exclusively
         by GTE.

         3.2. Jointly-Owned Non-Statutory Intellectual Property. On the terms
and subject to the conditions set forth herein and subject to the rights and
licenses granted to third parties on or before the Effective Date, GENUITY and
GTE shall jointly own, as of the Effective Date all right, title and interest in
and to any and all Jointly-Owned Non-Statutory Intellectual Property, with
neither party being required to account to the other therefor. Previously
Licensed Non-Statutory Intellectual Property shall continue to be owned solely
and exclusively by the owner thereof, and its use and other rights therein by
the other party defined by the terms and conditions of such separate agreements
between GTE and GENUITY or their respective Affiliates applicable to such
Previously Licensed Non-Statutory Intellectual Property.

         3.3. Other Existing Intellectual Property. Other Existing Intellectual
Property shall continue to be owned after the Effective Date by the party owning
such Other Existing Intellectual Property on the Effective Date.

         3.4. Other Intellectual Property.

         (a) Except as other expressly provided in Sections 3.40 for certain
Other Intellectual Property, ownership by any party hereto of any and all right,
title and interest in and to Other Intellectual Property shall be determined in
accordance with applicable law and/or any agreements into which such party has
entered with its employees, subcontractors, agents or other third parties

         (b) In certain circumstances, it may be possible to obtain Other
Intellectual Property in and to Jointly-Owned Non-Statutory Intellectual
Property. Notwithstanding joint ownership of Jointly-Owned Non-Statutory
Intellectual Property, the right to seek any Other Statutory Intellectual
Property on the Jointly-Owned Intellectual Property, and the ownership in and to
any right, title and interest of any such Other Intellectual Property that may
result, shall be determined in accordance with the following:

         (i)      for any and all Other Intellectual Property in and to works of
                  authorship and mask works that are Jointly-Owned Non-Statutory
                  Intellectual Property, the party or parties that employ at
                  least one author of such work (or in the case of a
                  work-for-hire, one contributor to such work) immediately after
                  the Effective Date shall have the right to seek such Other
                  Intellectual Property in and to such works and shall
                  exclusively own, as between the parties, all right, title and
                  interest in and to any Other Intellectual Property that result
                  therefrom;

                                       4
<PAGE>

         (ii)     in the event of multiple authors and/or contributors, as the
                  case may be, at least one of which authors and/or contributors
                  is employed immediately after the Effective Date by each of
                  the parties hereto, all right, title and interest in and to
                  such Other Intellectual Property that results therefrom shall
                  be jointly owned by both parties, without the obligation of
                  either party to account to the other therefor; and

         (iii)    in the event that the author(s) or contributor(s), as the case
                  may be, is not employed by any of the parties hereto, all
                  right, title and interest in and to such Other Intellectual
                  Property that results therefrom shall be jointly owned by
                  GENUITY and GTE, with neither party having a duty to account
                  to the other for the exploitation thereof.

         3.5. Preparation, Prosecution and Enforcement of Intellectual Property
Rights. Except as provided below for jointly-owned Intellectual Property Rights,
the owner of the Intellectual Property Rights, at its expense, shall control the
preparation, filing and prosecution of any patent applications directed to such
Intellectual Property Rights and to the maintenance and enforcement of any
patents that result therefrom, and the other party hereto shall cooperate with
the owner in such efforts at the owner's reasonable request and expense. For
purposes of Intellectual Property Rights which are jointly owned, GTE shall
control the preparation, filing and prosecution of such Intellectual Property
Rights and the cost thereof shall be borne equally by GTE and GENUITY; provided,
however, that (i) GTE will consult with GENUITY regarding the choice of foreign
jurisdictions in which to protect such Intellectual Property Rights; (ii) GTE
will provide copies of all documents filed with or received from the relevant
patent or other government offices in connection with the prosecution of such
Intellectual Property Rights; and (iii) the choice of prosecution counsel shall
be reasonably satisfactory to GENUITY. If GTE refuses to file a patent
application for protection of any such jointly owned Intellectual Property
Rights after GENUITY has requested that GTE do so, GENUITY may do so, with
counsel reasonably satisfactory to GTE, and the cost thereof shall be borne
equally by GTE and GENUITY.

                                       5
<PAGE>

         3.6. Limitations and Obligations of Ownership.

         (a) Each party shall have the right, but not the obligation, to obtain,
maintain and enforce any Intellectual Property Rights solely owned by such party
in such manner as such party deems appropriate in its sole discretion.

         (b) To the extent any party hereto has any right, title or interest in
or to any Intellectual Property Right that is to be owned jointly or exclusively
by the other party in accordance with the terms of this Section 0, such first
party shall assign, and hereby assigns, to such other party such portion or all
of the first party's right, title and interest in and to such Intellectual
Property Right as required hereunder. The first party shall execute and procure
such documents and take such other actions as may be reasonably requested from
time to time by the other party to obtain for its own benefit such Intellectual
Property Rights or otherwise to transfer or confirm its Intellectual Property
Rights.

         (c) For any and all jointly owned Intellectual Property Rights, subject
to the obligations of Confidentiality set forth in Section 0 hereof:

                  (i) Each party shall have an undivided joint interest with the
         other party in and to all such jointly owned Intellectual Property
         Rights.

                  (ii) Each party shall have the right to license or sublicense
         jointly owned Intellectual Property Rights without any duty to account
         to the other party.

                  (iii) Each party shall have the right to exercise or otherwise
         exploit jointly owned Intellectual Property Rights (including, without
         limitation, the right to make, use, offer for sale, sell, and make
         versions, adaptations and derivatives works), by any manner and means
         now known or hereafter devised, in perpetuity, without any duty to
         account to the other party.

                  (iv) Each party shall obtain waivers of any and all claims
         against the other party that any employee, subcontractor or agent of
         such party may now or hereafter have in any jurisdiction under "moral
         rights" or rights of "droit moral" encompassed by any jointly owned
         Intellectual Property Rights, and to the extent that such rights may
         not be waived, each such party shall secure covenants and stipulations
         of those individuals not to assert such rights against any of the other
         parties hereto or their respective successors, assigns, licensees and
         sublicensees.

                  (v) If either party becomes aware of any infringement, misuse
         or misappropriation of any jointly owned Intellectual Property Right,
         or any attempt to invalidate any jointly owned Intellectual Property
         Right, such party shall promptly notify the other party, and the
         parties shall thereafter confer in good faith regarding the steps, if
         any, that should be taken to remedy any such infringement, misuse or
         misappropriation or any such invalidity attempt. Either party shall
         have the right, at its sole discretion and expense, to enforce any
         jointly owned Intellectual Property Right against a third party. The
         other party shall reasonably cooperate in any such proceeding;
         provided, however, that the party bringing such proceeding shall
         reimburse the other party for such other party's costs and reasonable
         expenses, including reasonable attorneys fees, incurred in connection
         with such cooperation; and provided, further, that the duty of
         cooperation shall not interfere or diminish in any way with the right
         of such other party to grant licenses hereunder, including licenses to
         the accused infringer, and otherwise exploit all of such other party's
         rights in the jointly owned Intellectual Property Right.

                                       6
<PAGE>

                  (vi) Nothing contained in this Agreement, including, without
         limitation, joint ownership of Jointly-Owned Non-Statutory Intellectual
         Property, shall require either party or its Affiliates to disclose or
         otherwise provide to the other party or its Affiliates any
         Jointly-Owned Non-Statutory Intellectual Property.

         (d) GTE acknowledges and agrees that, as between the parties and as of
the Effective Date, GENUITY exclusively owns any and all right, title and
interest in Existing Patents listed on Schedule 2.3A, and that under this
Agreement, GTE shall acquire no right, title, or interest in or to any of the
foregoing, other than any rights expressly granted hereunder.

         (e) GENUITY acknowledges and agrees that, as between the parties and as
of the Effective Date, GTE exclusively owns any and all right, title and
interest in Existing Patents (other than Existing Patents listed on Schedules
2.3A and 2.3B), and that under this Agreement, GENUITY shall acquire no right,
title, or interest in or to any of the foregoing, other than any rights
expressly granted hereunder.

         (f) Notwithstanding anything contained in this Agreement, each party
expressly reserves the right to enforce its agreements with current and former
employees relating to Intellectual Property Rights or relating to obligations of
confidentiality, nondisclosure and nonuse of proprietary or confidential
information.

4. License Grants.

         4.1. GENUITY to GTE

         (a) Existing Patents. On the terms and subject to the conditions set
forth herein and subject to rights and licenses granted to third parties on or
before the Effective Date, GENUITY hereby grants to GTE a worldwide,
nonexclusive, perpetual, royalty-free and irrevocable right and license to
exercise and otherwise exploit all of the Existing Patents listed on Schedule
2.3A (including, without limitation, the right to make, have made, use, offer
for sale, sell, lease and license and to practice any method in the exercise of
the foregoing), by any manner and means now known or hereafter devised. This
License shall include the right of GTE to sublicense GTE's Affiliates and
BCT.Telus Communications Inc. and their successors and assigns; provided,
however, that they agree to be bound by the terms and conditions of this
Agreement, but shall not otherwise include the right to sublicense.

                                       7
<PAGE>

         (b) Negation of Licenses in Other Intellectual Property. Except and to
the extent expressly set forth in a separate written agreement between GTE and
GENUITY, no right or licenses, express or implied, are hereby granted to GTE or
its Affiliates under any other intellectual property owned by GENUITY or its
Affiliates.

         4.2. GTE to GENUITY

         (a) Existing Patents. On the terms and subject to the conditions set
forth herein and subject to rights and licenses granted to third parties on or
before the Effective Date, GTE hereby grants to GENUITY a worldwide,
nonexclusive, perpetual, royalty-free and irrevocable right and license to
exercise and otherwise exploit all Existing Patents solely owned by GTE or its
Affiliates as of the Effective Date (i.e., Existing Patents other than those
listed on Schedules 2.3A and 2.3B), including, without limitation, the right to
make, have made, use, offer for sale, sell, lease and license and to practice
any method in the exercise of the foregoing, by any manner and means now known
or hereafter devised. This License shall include the right of GENUITY to
sublicense GENUITY's Affiliates; provided, however, that they agree to be bound
by the terms and conditions of this Agreement, but shall not otherwise include
the right to sublicense.

         (b) Negation of Licenses in Other Intellectual Property. Except and to
the extent expressly set forth in a separate written agreement between GTE and
GENUITY, no right or licenses, express or implied, are hereby granted to GENUITY
or its Affiliates under any other intellectual property owned by GTE or its
Affiliates.

         4.3. Limitations and Obligations of Licensees.

         (a) Each party agrees neither to do nor to permit any act which may in
any way jeopardize or be detrimental to the validity of the other party's
Intellectual Property Rights licensed to such party hereunder.

         (b) If a party becomes aware of any infringement, misuse or
misappropriation of any Intellectual Property Rights of the other party licensed
to the first party hereunder, the first party shall notify the other party with
a commercially reasonable period of time and shall cooperate reasonably with the
other party, at the other party's request and expense, to terminate or remedy
such infringement, misuse or misappropriation.

         (c) Nothing contained herein shall be construed as obligating either
party to obtain, maintain or enforce Intellectual Property Rights licensed to
the other party hereunder.

         (d) Nothing herein shall be construed as granting either party, by
implication, estoppel or otherwise, any license or other right under any
Intellectual Property Rights, except for those rights expressly granted
hereunder.

                                       8
<PAGE>

5. Other Limitations on Ownership and Licenses.

         5.1. Prior Obligations. All rights in or to Intellectual Property
Rights granted by either party hereunder by assignment, license or otherwise,
are subject to any rights granted to any third party in such Intellectual
Property Rights as of the Effective Date hereof.

         5.2. Third Party Intellectual Property. Each party acknowledges that,
in order to exercise any rights granted hereunder, including but not limited to
Jointly-Owned Non-Statutory Intellectual Property, it may need to license or
otherwise obtain rights to use Third Party Intellectual Property. Such licenses
or other rights shall be at such party's sole cost and expense and the party
obtaining such licenses or other permissions shall be solely responsible for
observing and complying with the terms and conditions under which such Third
Party Intellectual Property is licensed or right is otherwise obtained from the
applicable third party.

6. Warranties.

         6.1. Allocation of Risk. An essential purpose of the exclusion of
warranties and limitation of liability provided in this Agreement is allocation
of risks between GTE and GENUITY, which allocation of risks is reflected in the
arrangements between GTE and GENUITY in this Agreement.

         6.2. No Conflicts. Each party warrants that, to the best of its
knowledge, it owns, or otherwise has the necessary rights in the Intellectual
Property Rights to assign ownership or to grant the rights and licenses conveyed
herein.

         6.3. Disclaimer. THE WARRANTIES IN THIS SECTION 0 ARE IN LIEU OF ALL
OTHER WARRANTIES, EXPRESS OR IMPLIED, WHETHER ARISING BY COURSE OF DEALING OR
PERFORMANCE, CUSTOM, USAGE IN THE TRADE OR PROFESSION OR OTHERWISE, INCLUDING
BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY, TITLE AND FITNESS FOR
A PARTICULAR PURPOSE OR WARRANTIES AGAINST INFRINGEMENT. WITHOUT LIMITING THE
FOREGOING, EACH PARTY EXPRESSLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OR
REPRESENTATION (i) THAT THE EXERCISE OR OTHER EXPLOITATION OF ANY INTELLECTUAL
PROPERTY RIGHTS ASSIGNED OR LICENSED BY IT HEREUNDER SHALL BE FREE FROM
INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY, AND (ii) OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE EVEN IF EITHER PARTY HAS
BEEN ADVISED OR SHOULD HAVE KNOWN OF SUCH PURPOSE. Except for the warranties
expressly set forth in this Section 0, each of the parties acknowledges and
agrees that it has relied on no other representations or warranties and that no
other representations or warranties have formed the basis of its bargain
hereunder.

                                       9
<PAGE>

7. Limitation of Liability

         EXCEPT FOR BREACH BY THE LICENSEE OF THE LIMITATIONS AND RESTRICTIONS
ON THE RIGHTS GRANTED UNDER THE INTELLECTUAL PROPERTY RIGHTS OF THE LICENSOR,
NEITHER PARTY BE ENTITLED TO RECOVER FROM THE OTHER PARTY ANY INCIDENTAL,
CONSEQUENTIAL, INDIRECT, SPECIAL OR PUNITIVE DAMAGES (INCLUDING, WITHOUT
LIMITATION, DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS OR LOSS OF USE),
WHETHER BASED ON CONTRACT, TORT (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE), OR
ANY OTHER CAUSE OF ACTION RELATING TO INTELLECTUAL PROPERTY RIGHTS ASSIGNED OR
LICENSED HEREUNDER OR CONFIDENTIAL INFORMATION, OR OTHERWISE RELATING TO THIS
AGREEMENT, EVEN IF THE OTHER PARTY HAS BEEN INFORMED OR SHOULD HAVE KNOWN OF THE
POSSIBILITY OF SUCH DAMAGES.

8. Confidential Information.

         8.1. Restrictions. The Confidential Information of the disclosing party
may be used by the receiving party only for the performance of its obligations
and the exercise of its rights hereunder and may only be disclosed to those
employees, subcontractors or agents of the receiving party who have a need to
know in order so to perform or exercise. Except and to the extent set forth in
Section 0, the receiving party may not disclose Confidential Information of the
disclosing party to any other person, entity or the public without the prior
written consent of the disclosing party; provided, however, that such
Confidential Information may be disclosed by the receiving party without the
necessity of prior written consent to the receiving party's employees,
subcontractors or consultants who require access to such Confidential
Information to perform the receiving party's obligations or to exercise its
rights hereunder; provided, however, such persons have entered into written
agreements which contain obligations of nondisclosure and nonuse no less
restrictive than set forth in this Section 0, which agreements shall be
enforceable by the disclosing party.

         8.2. Compliance with Governmental, Judicial Requirements. If a
receiving party receives a request to disclose any Confidential Information of
the disclosing party (whether pursuant to a valid and effective subpoena, an
order issued by a court or other governmental authority of competent
jurisdiction or otherwise) on advice of legal counsel that disclosure is
required under applicable law, the receiving party agrees that, prior to
disclosing any Confidential Information of the disclosing party, it shall (i)
notify the disclosing party of the existence and terms of such request or
advice, (ii) cooperate with the disclosing party in taking legally available
steps to resist or narrow any such request or to otherwise eliminate the need
for such disclosure at the disclosing party's sole expense, if requested to do
so by the disclosing party, and (iii) if disclosure is required, it shall be the
obligation of the disclosing party to use its best efforts to obtain a
protective order or other reliable assurance that confidential treatment shall
be afforded to such portion of the Confidential Information of the disclosing
party as is required to be disclosed.

                                       10
<PAGE>

         8.3. Continuing Obligation. The obligation of nondisclosure and nonuse
with respect to Confidential Information of the disclosing party shall survive
and continue for a period of five (5) years after the Effective Date; provided,
however, that the obligations of non-disclosure and non-use shall continue in
perpetuity for software in any form.

9. Dispute Resolution.

         9.1. General. Any controversy or claim arising out of or relating to
this Agreement, or the breach thereof, shall be settled first, by good faith
efforts of the parties to reach mutual agreement as set forth below.

         9.2. Initial Resolution. A party that wishes to initiate the dispute
resolution process shall send written notice to the other party with a summary
of the controversy and a request to initiate these dispute resolution
procedures. Each party shall appoint a knowledgeable, responsible representative
from the company who has the authority to settle the dispute, to meet and
negotiate in good faith to resolve the dispute. The discussions shall be left to
the discretion of the representatives, who may utilize other alternative dispute
resolution procedures such as mediation to assist in the negotiations.
Discussions and correspondence among the representatives for purposes of these
negotiations shall be treated as Confidential Information developed for purposes
of settlement, shall be exempt from discovery and production, and shall not be
admissible in the arbitration described above or in any lawsuit pursuant to Rule
408 of the Federal Rules of Evidence. Documents identified in or provided with
such communications, which are not prepared for purposes of the negotiations,
are not so exempted and may, if otherwise admissible, be admitted in evidence in
the arbitration or lawsuit. The parties agree to pursue resolution under this
subsection for a minimum of sixty (60) days before initiating an action in the
appropriate jurisdiction; provided, however, that each party reserves the right
to pursue and defend its rights in court after the said sixty (60) day period.

         9.3. Injunctive Relief. The foregoing notwithstanding, each party shall
have the right to seek injunctive relief in an applicable court of law or equity
pending resolution of the dispute in accordance with the foregoing.

                                       11
<PAGE>

10. General.

         10.1. Notice. Any written notice either party may give the other
concerning the subject matter of this Agreement shall be in writing and given or
made by means that obtain a written acknowledgment of receipt. Notices shall be
sent to the parties at the following addresses, which may be changed by written
notice:

                                  To GTE:
                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                              To GENUITY:
                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

                                          ----------------------------------

        Notice shall be deemed to have been given or made when actually
received, as evidenced by written acknowledgment of receipt.

         10.2. Compliance. GTE and GENUITY shall each comply with the provisions
of all applicable federal, state, and local laws, ordinances, regulations and
codes (including, without limitation, procurement of required permits or
certificates) in fulfillment of their obligations under this Agreement. All
Intellectual Property Rights Held by either party are subject to U.S. export and
foreign transactions control regulations. Each party undertakes that it shall
neither export, nor cause nor permit to be exported, without the other party's
prior written consent and without compliance with applicable law and regulation,
any such Intellectual Property Rights of the other party out of the United
States of America, nor shall such rights be made available by such party,
directly or indirectly, for use in any project associated with the design,
development, production, testing, stockpiling or use of: (i) nuclear weapons or
facilities to produce nuclear explosives, (ii) missiles, or (iii) chemical or
biological warfare agents. Each party agrees to comply with all applicable laws
and regulations relating to the exportation of technical information, as they
currently exist and as they may be amended from time to time.

         10.3. Assignment, Subcontracting. Neither this Agreement nor any rights
or obligations hereunder shall be assignable by either of the parties without
the other party's prior written consent; provided, however, that each party may
assign this Agreement to any Affiliate or to any purchaser of any of such party
or of such party's business to which such license relates upon the sale of all
or substantially all of the assets of such business or upon a merger, stock swap
or other means by which a third party acquires that part of such party's
business to which such license relates. Any attempted or purported assignment in
violation of the foregoing shall be void. Subject to the foregoing, this
Agreement shall be binding upon and inure to the benefit of the successors and
permitted assigns of each party hereto.

         10.4. Waiver of Terms and Conditions. Failure to enforce any of the
terms or conditions of this Agreement shall not constitute a waiver of any such
terms or conditions, or of any other terms or conditions.

                                       12
<PAGE>

         10.5. Severability. Where any provision of this Agreement is declared
invalid, illegal, void or unenforceable, or any changes or modifications are
required by regulatory or judicial action, and any such invalid, illegal, void
or unenforceable provision, or such change or modification, substantially
affects any material obligation of a party hereto, the remaining provisions of
this Agreement shall remain in effect and the parties shall mutually agree upon
a course of action with respect to such invalid provision or such change or
modification to the end that the purposes of this Agreement are carried out.

         10.6. Governing Law. This Agreement, and the rights and obligations
contained in it, shall be governed by and construed in accordance with the laws
of the State of New York, without regard to any conflicts of law principles that
would require the application of the laws of any other jurisdiction.

         10.7. No Unreasonable Delay or Withholding. Where agreement, approval,
acceptance, consent or similar action by GENUITY or GTE is required, such action
shall not be unreasonably delayed or withheld.

         10.8. Force Majeure. If performance of any obligations by either party
under this Agreement is prevented, restricted or interfered with by reason of
acts of God, wars, revolution, civil commotion, acts of public enemy, embargo,
acts of government in its sovereign capacity, labor difficulties, including,
without limitation, strikes, slowdowns, picketing or boycotts, communication
line failures, power failures, or any other circumstances beyond the reasonable
control and not involving any fault or negligence of the party affected, the
party affected, upon giving prompt notice to the other party, shall be excused
from such performance on a day-to-day basis during the continuance of such
prevention, restriction or interference (and the other party shall likewise be
excused, on a day-to-day basis during the same period, from performance of its
obligations which are dependent upon or affected by such nonperformance);
provided, however, that the party so affected shall use its best reasonable
efforts to avoid or remove such causes of nonperformance and both parties shall
proceed immediately with the performance of their obligations under this
Agreement whenever such causes are removed or cease.

         10.9. Entire Agreement. This Agreement represents the entire
understanding between the parties with the respect to its provisions and cancels
and supercedes all prior agreements or understandings, whether written or oral,
with respect to the subject matter. This Agreement may only be modified or
amended by an instrument in writing signed by duly authorized representatives of
the parties. This Agreement shall be deemed to include all Schedules attached
hereto.

                                       13
<PAGE>

        IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed and delivered by their duly authorized officers to be effective as of
the Effective Date.

GTE SERVICE CORPORATION                   GENUITY INC.

By:                                       By:
       ------------------------------            ------------------------------

Name:                                     Name:
       ------------------------------            ------------------------------

Title:                                    Title:
       ------------------------------            ------------------------------

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

                                       14
<PAGE>

SCHEDULE 2.3A

                                  SCHEDULE A

97-416
99-308PRO1
99-309PRO1
99-314

                                       15
<PAGE>

SCHEDULE 2.3B

                                   SCHEDULE B

97-415 JA
97-418
97-420
97-420PCT
97-420 EP
97-431
97-441CIP1
97-446
97-447 AU
97-447 CN
97-447 EP
97-452
97-452 CN
97-452 GW
97-452 SW
97-453
97-453PCT
97-453 EP
97-454
97-455
97-455PCT
97-455 EP
98-404
98-404 PCT
98-407
98-409
98-409PCT
98-409 EP
98-410
98-412
98-414
98-417
98-418
98-426
98-427
98-428
98-429
98-430
98-432
98-433
98-437
99-401
99-405
99-406
99-406PCT
99-407
99-408
99-409
99-410
99-426PRO
99-403
99-701
99-702
99-703
97-408
97-409
97-415
97-417
97-417 AU
97-417 CN
97-417 EP
97-417 JA
97-426
97-430
97-447
97-447 JA
97-457
97-457 AU
97-457 CN
97-457 FR
97-457 GB
97-457 GW
97-458
97-459
97-459 DK
97-459 EP
97-459 FR
97-459 GB
97-459 GW
97-459 IT
97-464
97-467
97-467 FR
97-467 GB
97-467 GW
97-467 JA
97-471
97-474
98-438
99-414
99-415
99-420
99-421
99-422
99-427
99-430
99-435
99-442
99-443
99-445
99-449
99-451
99-454
99-455
99-460
99-463PRO1
99-464PRO1
99-465
99-466
99-467
99-471
00-4008
00-4012
00-4013
00-4015
97-460 CPA
99-301
99-302
99-303
99-304
99-305
99-306
99-307
99-310
99-311
99-312
99-313
99-315
99-316
99-317
99-318
99-319
00-3001
00-3002
00-3003
00-3004
00-3005
00-3006
00-3007
00-3008
00-4019
00-4020
00-4025
00-4009
98-809
98-814
98-501
98-507
98-502
98-503
98-508
99-502
99-503
88-3-429
89-3-672
94-3-711 CN
94-3-711 EP
94-3-711 JA
94-3-726
96-3-507
96-3-511
96-3-511 CON 1
97-809
97-809 PCT
97-813
97-813 PCT
97-814
97-814 PCT
97-816
97-816 PCT
97-822
97-822 EP
97-822 PCT
98-801
98-801 PCT
98-802 C1 PCT
98-802 CIP 1
98-803
98-803 PCT
98-804
98-806
99-806
99-807
99-808
99-810
99-833
99-837
99-838
99-845
99-864
99-865
99-866
99-867
99-969
99-970
99-973
97-450CPA
97-450PCT
97-450AU
97-450CN
97-450EP
97-450JA
97-450NZ
99-313

                                       16

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