Document:

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                                                                   Exhibit 10.10

                           INDEMNIFICATION AGREEMENT

THIS INDEMNIFICATION AGREEMENT (this "Agreement") is made and entered into this
__ day of July, 2000, by and among Tyco International Ltd., a Bermuda company
("Indemnitor"), TyCom Ltd., a Bermuda company ("TyCom"), and Tyco Submarine
Systems Ltd., a Delaware company ("TSSL").

                              W I T N E S S E T H:

WHEREAS, TSSL is the defendant in that certain civil action, number 00 Civ.
3860, pending in the United States District Court for the Southern District of
New York, styled "Global Crossing Ltd. and South American Crossing (Subsea) Ltd.
v. Tyco Submarine Systems Ltd." (the "Litigation");

WHEREAS, TSSL is the respondent in that certain arbitration proceeding before
the American Arbitration Association, Demand for and Notice of Arbitration,
dated May 22, 2000, styled "Atlantic Crossing Ltd., GT Landing Corp., GT U.K.
Ltd., Global Telesystems GmbH, and GT Netherlands BV against Tyco Submarine
Systems Ltd." (the "Arbitration");

WHEREAS, TyCom is the indirect parent of TSSL; and

WHEREAS, Indemnitor seeks to provide comfort and indemnity in the event of any
liability which may attach to TSSL or to TyCom ( the "Indemnitees") arising out
of or relating to the  Litigation and the Arbitration, and any other claim,
counterclaim, action or proceeding  relating thereto or arising therefrom
(collectively, the "Actions").

NOW THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which is expressly acknowledged, the parties hereto agree as
follows:

1.  Indemnitor shall protect, indemnify, defend, and hold harmless the
Indemnitees, their respective shareholders and subsidiaries, and the officers,
directors, employees, agents, successors and assigns of each of them
(Indemnitees and such persons collectively referred to as "Indemnitees'
Indemnified Persons"), from and against any and all claims, judgments, losses,
liabilities, expenses (including interest and penalties), and damages,
including, without limitation, compensatory and punitive damages, presently
asserted or subsequently awarded in any or all of the Actions; provided,
however, that the Indemnitor shall not be required to protect, indemnify, defend
or hold harmless hereunder any of Indemnitees' Indemnified Persons from or
against any claim, judgment, loss, liability, expense or damage arising out of
the award of any injunctive relief granted in connection with the Actions,
provided further, that the exclusion in the foregoing proviso shall not extend
to any claim, judgement, loss, liability, expense or damage arising out of any
claim by a third party as a result of action or refusal or forbearance to act by
Indemnitees' Indemnified Person required by any such injunctive relief.
Indemnitor's obligations hereunder shall include, without limitation, paying
when due, or reimbursing Indemnitees' Indemnified Persons for, without demand,
all costs of defense of
<PAGE>

Indemnitees' Indemnified Persons including, without limitation, all reasonable
attorneys' fees and legal expenses incurred by Indemnitees' Indemnified Persons
in relation to the Actions. Indemnitor shall have full control over all matters
pertaining to the conduct of the Actions including, subject to Section 4 hereof,
the settlement thereof. This Agreement shall become effective without any
further action required by any of the parties hereto upon the consummation of
the proposed initial public offering of the shares of TyCom.

2.  Indemnitees shall provide Indemnitor with such cooperation, assistance and
information as Indemnitor may reasonably request with respect to the Actions or
any insurance claim relating thereto. Indemnitees shall make available and leave
open for Indemnitor's inspection at reasonable times and upon reasonable notice
all documentation (including, without limitation, files, data, books and
records) relating in any manner to the Actions, and Indemnitor may, at its
expense, make copies of any documentation as it may reasonably request.
Indemnitees shall afford Indemnitor reasonable access to Indemnitees' officers,
directors, employees and agents as may be designated by Indemnitor to assist
Indemnitor's counsel in connection with the Actions. Such assistance may
include, without limitation, interviews or attendance at or participation in
depositions, legal proceedings or settlement negotiations. Indemnitor shall
reimburse Indemnitees' Indemnified Persons for any reasonable out-of-pocket
expenses incurred by Indemnitees' Indemnified Persons in providing any
documentation, and shall reimburse Indemnitees for any reasonable out-of-pocket
costs incurred in connection with making any officers, directors, employees or
agents available to assist Indemnitor as provided hereinabove. Each of
Indemnitees' Indemnified Persons shall have the right to retain its own counsel,
but the fees and expenses of such counsel shall be at the expense of such
Indemnitees' Indemnified Person.

3.  Indemnitees shall cooperate fully with Indemnitor in any effort by
Indemnitor to reach any reasonable compromise or settlement of any action with
any party to the Actions (or any insurance claim related thereto), including by
participating in or providing the means to effect through the use of its
commercial facilities (including, without limitation, its capabilities to
design, manufacture, install, operate and maintain undersea fiber cable systems)
on terms not less favorable than would be offered to third parties generally to
effect any such compromise or settlement based, in whole or in part, on
commercial arrangements with any such party.  Indemnitor shall pay and bear any
loss, liability, expense or damage to any Indemnitees' Indemnified Persons to
the extent resulting from use of Indemnitees' commercial facilities on terms
that are less favorable to Indemnitees than would be offered to third parties
generally in connection with any compromise or settlement of any of the Actions
to that same extent as if such loss, liability, damage or expense was an amount
awarded in the Actions for which Indemnitor  would be responsible hereunder.

4.  Any compromise or settlement that is consummated by Indemnitor with a party
to such Action in a manner materially adverse to Indemnitees shall, unless (i)
Indemnitor shall pay and bear all of the amounts, losses, liabilities and
expenses and damages payable pursuant to such settlement to the same extent as
if they were amounts awarded
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in the Actions for which Indemnitor is responsible and (ii) such compromise or
settlement contains full releases in customary form of all Indemnitees'
Indemnified Persons in respect of the Actions, require the prior consent of a
majority of the independent members of the board of directors of TyCom (which
consent shall also be binding upon TSSL), which consent shall not be
unreasonably withheld.

5.  This Agreement is made without any admission of liability by Indemnitees or
Indemnitor and shall not be interpreted as an admission of liability.
Indemnitees and Indemnitor expressly deny any such liability.

6.  Any failure on the part of Indemnitees' Indemnified Persons to enforce its
rights under this Agreement shall not be construed as a subsequent waiver of any
such right.

7.  All notices, requests, and other communications to any party hereunder shall
be in writing (including facsimile transmission) and shall be given,

if to Indemnitor, to:

The Zurich Centre
Second Floor
90 Pitts Bay Road
Pembroke HM 08, Bermuda
Fax: 441-295-9647
Attention: Chief Corporate Counsel

if to TSSL, to:

60 Columbia Turnpike, Bldg. A
Morristown, NJ 07960
Fax: 973-656-8805
Attention: President

If to TyCom, to:

The Zurich Centre
Second Floor, Suite 201
90 Pitts Bay Road
Pembroke HM 08, Bermuda
Fax: 441-295-9777
Attention: President

or such other address or facsimile number as such party may hereafter specify
for the purpose by notice to the other parties hereto. All such notices,
requests and other communications shall be deemed received on the date of
receipt by the recipient thereof if received prior to 5 p.m. in the place of
receipt and such day is a business day in the place of receipt. Otherwise, any
such notice, request or communication shall be deemed
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not to have been received until the next succeeding business day in the place of
receipt. In the event that TyCom does not issue a notice hereunder within a
reasonable period after a request to do so by a majority of the independent
members of the board of directors of TyCom, then Indemnitor and TyCom agree that
such notice may be given on behalf of TyCom by any independent member of its
board of directors.

8.  This Agreement may be amended, modified, superseded or cancelled, and any of
the terms, covenants, or conditions hereof may waived, only by an instrument in
writing signed by a majority of the independent members of the board of
directors of TyCom, or each of the parties hereto or, in the case of a waiver,
by or on behalf of the party waiving compliance.

9.  This Agreement, as amended by any written amendments, constitutes the
entire agreement between the parties, written or oral, with respect to the
subject matter
hereof.

10.  This Agreement shall be governed by and construed in accordance with
the laws of the State of  New York without giving effect to the conflict of laws
principles
thereof.

11.  This Agreement and the covenants, terms and conditions set forth herein
shall be binding upon and shall inure to the benefit of the parties hereto and
their respective successors and assigns.

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

TYCO INTERNATIONAL LTD.               TYCO SUBMARINE SYSTEMS LTD.

By:_______________________            By:____________________________
Its:______________________            Title:_________________________

TYCOM LTD.

By:_______________________
Its:______________________<PAGE>

                                                                   EXHIBIT 10.11

                              [US EMPLOYEES ONLY]

                           EMPLOYEE CONFIDENTIALITY,
              INVENTION ASSIGNMENT, AND NON-COMPETITION AGREEMENT

     I understand that, in connection with my employment with TyCom (US) Inc. or
any affiliate of TyCom (US) Inc. (individually and collectively, "TyCom"), I
will be receiving access to TyCom's confidential information, its customers and
suppliers.  I also understand that TyCom will grant me stock options, under the
Tycom Ltd. Long Term Incentive Plan Non-Qualified Stock Option Agreement
("LTIP").  In return for TyCom's grant of such access and the LTIP, and other
good and valuable consideration, the receipt and sufficiency of which is
acknowledged, I hereby agree to the following terms and conditions:

     1.   TyCom Confidential Information.  "TyCom Confidential Information" is
          ------------------------------
information developed, created, or discovered by TyCom that has value to TyCom's
business and is not known to TyCom's competitors or by the general public, or is
otherwise proprietary or confidential to TyCom.  TyCom Confidential Information
may include, without limitation, data, know-how, manufacturing methods,
formulas, algorithms, computer programs, processes, designs, sketches,
photographs, plans, drawings, product concepts, improvements, specifications,
samples, reports, laboratory notebooks, vendor names, customer and prospective
customer names, distributor names, cost and pricing information, market
definitions, business plans, marketing plans, financial plans, customer and
prospective customer development information and strategies, sales methods,
inventions,  trade secrets, ideas, research and development activities and
plans, and employee and/or personnel information (including compensation, skill,
and areas of expertise).

     2.  Obligation of Confidentiality.  I agree, both during and after my
         -----------------------------
employment with TyCom, to keep TyCom Confidential Information secret.  I agree
not to disclose, record, or in any way make use of TyCom Confidential
Information for so long as such information remains non-public, except as
required in the performance of my duties and responsibilities as a TyCom
employee and under conditions that protect the TyCom Confidential Information.
I also agree not to remove or otherwise transmit TyCom Confidential Information
from TyCom's premises or possession without the explicit consent of an
authorized TyCom representative.  Further, I agree to keep confidential third
party information (including, but not limited to, information received by TyCom
from customers, prospective customers, and suppliers) that is covered by a
confidentiality agreement between TyCom and the third party and to adhere to the
terms of the agreement between TyCom and the third party.

     3.  TyCom Property.   All TyCom Confidential Information, as well as all
         --------------
patents, patent rights, copyrights, copyrightable works, trade secret rights,
trademark
<PAGE>

rights, and other rights (including, without limitation, intellectual property
rights) anywhere in the world related to TyCom Confidential Information, is, and
shall be, the sole and exclusive property of TyCom. I hereby assign to TyCom any
and all rights, title, and interest I may have or acquire in such TyCom
Confidential Information and related rights. I agree to deliver all TyCom
Confidential Information, including all copies or computer records thereof,
along with any other TyCom property, to TyCom on or before my last day of
employment with TyCom and agree thereafter not to make any written record of
such Confidential Information nor to make use of such Confidential Information.

     4.  Loyalty.  I agree to conduct myself at all times for the benefit of
         -------
TyCom, to never knowingly take any action inconsistent with TyCom's best
interest, and to refrain from performing any work or services for any third
person or concern, including self-employment, with respect to any matter that
relates to or conflicts with TyCom business without the prior written consent of
an authorized TyCom representative.

     5.  Inventions.  I agree that all inventions, including, but not limited
         ----------
to, improvements, and all know-how, processes, techniques, formulas, ideas,
circuits, designs, patents, trademarks, trade secrets, and copyrightable works
("Inventions") that result from work performed by me on behalf of TyCom or based
on or related to access to TyCom Confidential Information or property, shall be
the sole property of TyCom.  I agree, both during and after my employment with
TyCom for a period of five (5) years, to disclose promptly and in writing, to
the individual designated by TyCom or to my immediate supervisor, all Inventions
that I, either solely or jointly with others, make, author, discover, develop,
conceive, and/or reduce to practice that are derived from TyCom Confidential
Information. I hereby assign and agree to assign to TyCom or its designee,
without further consideration, my entire right and interest in and to all
Inventions, including all rights to obtain, register, and enforce patents,
copyrights, mask work rights, and other intellectual property protection for
Inventions.  I agree to execute all documents reasonably necessary to perfect
such intellectual property rights and the assignment of those rights to TyCom or
its designee.  I further agree to assist TyCom (at TyCom's expense), both during
the term of my employment and for a period of twelve months thereafter, in
obtaining, protecting, and/or enforcing patents, copyrights, or other forms of
Inventions.  The terms of this Agreement supplement rather than supersede the
terms of that certain Employee Agreement Regarding Intellectual Property (the
"EARIP").  However, in the case of conflict between the terms of the EARIP and
this Agreement, the terms of this Agreement shall govern.

     6.  Patent Applications.  As a TyCom employee, after the filing of any
         -------------------
original patent application covering any invention of which I am a named
inventor, I am eligible to participate in any applicable TyCom inventor award
program.

     7.  Excluded Inventions.  Attached is a list of all inventions which have
         -------------------
been conceived and/or reduced to practice by me prior to my employment by TyCom
and
<PAGE>

which I desire to exclude from this Agreement. If no list is attached to this
Agreement, no inventions exist to be excluded at the time of the signing of this
Agreement. [For California employees, the text of California Labor Code Section
2870 is attached.]

     8.  Former Employer Information.  I represent and warrant that my
         ---------------------------
performance of all the terms of this Agreement and as an employee of TyCom does
not and will not breach any agreement to keep in confidence any confidential or
proprietary information, knowledge, or data acquired by me in confidence or in
trust prior to my employment by TyCom.  I will not disclose to TyCom, nor induce
TyCom to use, any confidential or proprietary information, data, or material
belonging to any previous employers or others.

     9.  Non-Solicitation.  I acknowledge that information, data, or material
         ----------------
concerning TyCom's customers, affiliates, and employees is highly confidential.
I agree, both during my employment and for a period of twelve months thereafter,
not to directly or indirectly solicit, recruit, hire, or encourage any employees
or consultants to leave the employ of TyCom, nor to directly or indirectly
encourage any customers, suppliers, or affiliates to refrain from or to stop
doing business with TyCom, either on my own behalf or on behalf of any other
person or entity.

     10.  No Contract of Employment.  I agree that this Agreement is not a
          -------------------------
contract of employment, and no rights to employment, continued employment,
advancement, or reassignment are hereby created.  I ALSO UNDERSTAND THAT MY
EMPLOYMENT WITH TYCOM IS AT-WILL, WHICH MEANS THAT EITHER I OR TYCOM MAY
TERMINATE THE RELATIONSHIP WITH OR WITHOUT CAUSE AT ANY TIME WITHOUT NOTICE AND
NOTHING IN THIS AGREEMENT ALTERS THIS RELATIONSHIP AT-WILL.

     11.  Governing Law.  This Agreement shall be governed by and construed
          --------------
under the laws of the state in which I work or was last employed by TyCom.

     12.  Severable Provisions.  In the event one or more of the provisions, or
          --------------------
portions thereof, contained in this Agreement shall, for any reason be invalid,
illegal, or unenforceable, such circumstances shall not affect any other
provision hereof and this Agreement shall continue in full force and effect and
be construed as if such provision, to the extent that it is invalid, illegal or
unenforceable, had never been contained herein.

     13.  Injunctive Relief.  Given the nature of the TyCom Confidential
          -----------------
Information and the parties' current discussions, I acknowledge that TyCom may
be irreparably damaged by any unauthorized disclosure of any TyCom Confidential
Information.  Without prejudice to the rights and remedies otherwise available
to TyCom, TyCom shall be entitled to seek equitable relief, including an
injunction or specific performance, in the event of any breach of the provisions
of this Agreement by me.
<PAGE>

     14.  Non-Competition.  I agree, subject to the conditions hereinafter
          ----------------
stated, that I will not, within one year after leaving TyCom's employ, engage or
enter into employment by, or into self-employment or gainful occupation as, a
Competing Business, or act directly or indirectly as an advisor, consultant,
agent, or representative for a Competing Business.  As used herein, "Competing
Business" means a business (1) which is engaged in the manufacture, sale or
other disposition of a product or service, whether existing or under
development, of TyCom; (2) which has under development a product or service that
is in direct competition with a product or service, whether existing or under
development, of TyCom, or (3) which involves activities that would likely result
in my eventual disclosure of TyCom Confidential Information if I were employed
by said business.

15.  Rescision.  I agree that with respect to my options under the LTIP, any
     ---------
failure to comply with the provisions of this Agreement (i) at any time shall
result in the immediate forfeiture of all outstanding options under LTIP held by
me and (ii) prior to, or during the six months after, any exercise, payment or
delivery pursuant to such option shall cause such exercise, payment or delivery
to be rescinded.  TyCom shall notify me in writing of any such rescission within
two years after such exercise, payment or delivery, provided, however, that
TyCom may, in its discretion, in any individual case, provide for waiver in
whole or in part of compliance with the provisions of this paragraph 15.  Within
ten days after receiving such a notice from TyCom, I agree to pay to TyCom the
amount of any gain realized or payment received as a result of the rescinded
exercise, payment or delivery pursuant to the option.  Such payment shall be
made either in cash or by returning to TyCom the number of shares of TyCom stock
that I received in connection with the rescinded exercise, payment or delivery.

I acknowledge that TyCom regards the safeguarding of TyCom Confidential
Information, the confidential information of third parties that TyCom receives
in confidence, and TyCom Inventions to be vital to TyCom's interests.  I further
acknowledge that TyCom is relying on me to honor this duty to protect such TyCom
Confidential Information and Inventions in employing me, and is entrusting me
with access to TyCom Confidential Information, the confidential information of
third parties, and TyCom business opportunities.  Accordingly, by signing this
Agreement I express my intent to be legally bound by the terms hereof.

I have not entered into, and I agree I will not enter into, any agreement,
either written or oral, in conflict with this Agreement or in conflict with my
employment with TyCom.

_____________________________________            _______________________________

Employee's Name (Print)                          Employee Number

_____________________________________            _______________________________
Employee's Signature                             Date

_____________________________________            _______________________________
TyCom Authorized Agent                           Date
<PAGE>

California Labor Code
---------------------

     2870. Employment Agreements; Assignment of Rights.

(a)  Any provision in an employment agreement which provides that an employee
     shall assign any of his or her rights in an invention to his or her
     employer shall not apply to an invention that the employee developed
     entirely on his or her own time without using the employer's equipment,
     supplies, facilities, or trade secret information except for those
     inventions that either:

(1)  Relate at the time of conception or reduction to practice of the invention
     to the employer's business, or actual or demonstrably anticipated research
     or development of the employer; or

(2)  Result from any work performed by the employee for the employer.

(b)  To the extent a provision in an employment agreement purports to require an
     employee to assign an invention otherwise excluded from being required to
     be assigned under subdivision (a), the provision is against the public
     policy of this state and is unenforceable.

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