Exhibit 4.19THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THESECURITIES LAWS OF ANY JURISDICTION. THIS NOTE MAY NOT BE OFFERED, SOLD, HYPOTHECATED, GIVEN,BEQUEATHED, TRANSFERRED, ASSIGNED, PLEDGED, ENCUMBERED, OR OTHERWISE DISPOSED OF (“TRANSFERRED”)EXCEPT PURSUANT TO (I) A REGISTRATION STATEMENT WITH RESPECT TO THIS NOTE THAT IS EFFECTIVE UNDERSUCH ACT OR APPLICABLE STATE SECURITIES LAW, OR (II) ANY EXEMPTION FROM REGISTRATION UNDER SUCHACT, OR APPLICABLE STATE SECURITIES LAW, RELATING TO THE DISPOSITION OF SECURITIES, PROVIDED THATAN OPINION OF COUNSEL IS FURNISHED TO THE COMPANY, TO THE EXTENT REASONABLY REQUESTED BY THECOMPANY, IN FORM AND SUBSTANCE REASONABLY SATISFACTORY TO THE COMPANY, TO THE EFFECT THAT ANEXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE ACT AND/OR APPLICABLE STATE SECURITIES LAW ISAVAILABLE.$[            ] New York, New YorkApril 3, 2007**VIATEL HOLDING (BERMUDA) LIMITED****Senior Secured Increasing Rate Note due 2007**     Viatel Holding (Bermuda) Limited, a company organized under the laws of Bermuda (or itssuccessor, the “Company”), hereby unconditionally promises to pay to the order of [           ] (the “Holder”), a company incorporated in [ ], the principal amount of[            ] U.S. Dollars (U.S.$[            ]), on July 1, 2007 (the “MaturityDate”), and to pay interest at the time, in the form and at the rate set forth herein. Certaincapitalized terms used herein without definition shall have the meanings assigned to them inArticle 9 hereof. This Note is issued in accordance with and subject to the followingterms and conditions:**ARTICLE 1****PRINCIPAL AND INTEREST**Section 1.1. Principal and Interest.      (a) The Company shall on the Maturity Date pay to the order of the Holder an amount equal tothe aggregate principal amount of this Note outstanding on the Maturity Date, plus accrued andunpaid interest thereon, unless and to the extent that this Note is earlier redeemed, repurchasedor repaid in accordance with the terms of this Note.     (b) Interest shall be payable semi-annually, in arrears, on each July 15 and January 15 afterthe issuance of this Note (the “Interest Payment Dates”); provided, however, that the firstInterest Payment Date shall be the Maturity Date. Interest shall accrue on the unpaid principalamount of this Note at the rate of 12.75% *per annum*from the Closing Date, or from the most recentInterest Payment Date for which the applicable interest payment has been made, until the principalamount of this Note is paid in full; *provided*, *that*such interest rate
 

 
shall increase by 0.50% *per annum*on each Interest Payment Date (such interest rate as of anydate of determination, the “Applicable Rate”). Interest on this Note shall be computed onthe basis of a 360-day year composed of twelve 30-day months.     (c) If a date for payment of principal or interest is a Legal Holiday, payment shall be madeon the next succeeding day that is not a Legal Holiday, and interest shall accrue for theintervening period.     (d) The Holder of this Note must surrender this Note to the Company to collect principalpayments.     (e) The Company will pay principal and interest in money of the United States that at the timeof payment is legal tender for payment of public and private debts in immediately available funds(without any counterclaim, setoff, recoupment or deduction whatsoever, and free and clear of, andwithout any withholding or deduction for or on account of, any present or future taxes, levies,imports, duties, charges or fees of any nature) and by wire transfer to a U.S. dollar accountmaintained by the Holder with a bank in the United States designated in writing by the Holder. Allpayments of interest and principal in respect of this Note shall be made on the due date thereof nolater than 3:00 p.m., New York, New York time. Any payment received by the Holder after 3:00 p.m.,New York, New York time, on any day, will be deemed to have been received on the following BusinessDay.     (f) The Company agrees that to the extent the Company makes a payment or payments hereunderwhich payment or payments, or any part thereof, are subsequently invalidated, declared to befraudulent or preferential, set aside and/or required to be repaid to the Company or its successorsunder any Bankruptcy Law, state or federal law, common law or equitable cause, then, to the extentof such payment or repayment, the obligations, or part thereof, under this Note that have beenpaid, reduced or satisfied by such amount shall be reinstated and continued in full force andeffect as of the time immediately preceding such initial payment, reduction or satisfaction.     (g) To the extent lawful, the Company shall pay interest on (i) overdue principal and (ii)overdue installments (without regard to any applicable grace period or payment blockage) ofinterest, in each case at a rate equal to the Applicable Rate plus 2% *per annum*, compoundedsemi-annually.     (h) To guarantee the due and punctual payment of the principal and interest, if any, on thisNote and all other amounts payable by the Company under this Note when and as the same shall be dueand payable, whether at maturity, by acceleration or otherwise, according to the terms of thisNote, the Guarantors have, jointly and severally, unconditionally guaranteed the Obligationspursuant to the terms of the Security Trust Agreement.     (i) This Note and the other Senior Secured Increasing Rate Notes are secured on afirst-priority basis by the Security Interest created by the Security Documents pursuant to, andsubject to the terms of, the Security Trust Agreement.     (j) If any deduction or withholding for any present or future taxes, assessments or othergovernmental charges of (x) Bermuda or any political subdivision or
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governmental authority thereof or therein having power to tax, (y) any jurisdiction, otherthan the United States, from or through which payment on this Note is made by the Company orGuarantors, or any political subdivision or governmental entity thereof or therein having the powerto tax or (z) or any other jurisdiction, other than the United States, in which the Company orGuarantors are organized, or any political subdivision or governmental authority thereof or thereinhaving power to tax, shall at any time be required by such jurisdiction (or any such politicalsubdivision or taxing authority) in respect of any amounts to be paid by the Company or Guarantorsunder this Note, the Company or Guarantors will pay to the Holder any additional amounts as may benecessary in order that the net amounts paid to such Holder who, with respect to any such tax,assessment or other governmental charge, is not resident in, or a citizen of, such jurisdiction,after such deduction or withholding, shall be not less than the amount specified in this Note towhich the Holder is entitled.**ARTICLE 2****TRANSFER**     The Company and, by acceptance of this Note, the Holder hereby agree that the followingprovisions shall govern the registration, sale, assignment, pledge, transfer, encumbrance or otherdisposition of this Note.     Section 2.1. Note Registration. The Company shall keep at its principal office aregister (the “Register”) in which the Company shall enter the name and address of theregistered holder of this Note. References to the “Holder” of this Note shall mean theperson listed in the Register as the payee of this Note unless the payee shall have presented thisNote to the Company for transfer and the transferee shall have been entered in the Register as asubsequent holder, in which case the term shall mean such subsequent holder. The registered holderof this Note may be treated as the owner of it for all purposes.     Section 2.2. Disposition. (a) This Note may, directly or indirectly, be sold,assigned, pledged, transferred, encumbered or otherwise disposed of (each, a “transfer”) inaccordance with applicable law.     (b) A transfer of this Note permitted by paragraph (a) of this Section shall only be effectedby the Holder hereof by delivery of this Note to the Company (with the instrument of assignmentprovided on this Note properly completed in accordance with the terms and conditions of this Note),accompanied by an opinion of counsel, in form and substance, and from counsel, reasonablysatisfactory to the Company, and by such other evidence as the Company may reasonably require ofcompliance with the Securities Act and applicable state securities laws and with the provisions ofthis Note, at the Company’s principal office or at such other location as the Company shalldesignate in writing to the Holder; *provided*, *however*, that such transfer of this Note shall becomeeffective only upon, and shall not be effective for any purpose until, the Company has receivedthis Note.     (c) No service charge will be made for any such transfer or assignment.
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**ARTICLE 3****OUTSTANDING NOTES**     Section 3.1. (a) Outstanding Notes. The Senior Secured Increasing Rate Notesoutstanding at any time are all the Senior Secured Increasing Rate Notes issued by the Companyexcept for those cancelled by it and those surrendered to it for cancellation. A Note also ceasesto be outstanding because the Company or any direct or indirect Subsidiary of the Company holds theNote.     (b) Direction, Waiver and Consent Requirements. In determining whether theNoteholders of the required principal amount of Senior Secured Increasing Rate Notes have concurredin any direction, waiver or consent, Senior Secured Increasing Rate Notes owned by the Company orany direct or indirect Subsidiary of the Company shall not be considered as though they areoutstanding.**ARTICLE 4****INTENTIONALLY OMITTED****ARTICLE 5****REDEMPTION OF SECURITIES**     Section 5.1. Optional Redemption. This Note along with all other Senior SecuredIncreasing Rate Notes shall be redeemable at the option of the Company, in whole and not in part,on not less than 5 nor more than 20 days prior notice, in cash by wire transfer to a U.S. dollaraccount maintained by the Holder with a bank in the United States designated in writing by theHolder at 100% of the principal amount, plus accrued and unpaid interest to the Redemption Date;*provided*, *that*in the event of a Change of Control prior to or in connection with any such optionalredemption, the Redemption Price will be the greater of the price set forth above and the Change ofControl Put Price.     Section 5.2. Mandatory Redemption.     (a) Asset Sales. Not later than the second Business Day following receipt by theCompany or any of its Subsidiaries of any Net Asset Sale Proceeds, except with respect to certainpossible asset sales disclosed to the Noteholders prior to the date hereof, the Company shall senda notice of redemption in accordance with Section 5.3 below to redeem the Notes in an aggregateamount equal to such Net Asset Sale Proceeds.     (b) Insurance/Condemnation Proceeds. Not later than the second Business Day followingthe date of receipt by the Company or any of its Subsidiaries of any Net Insurance/CondemnationProceeds, the Company shall send a notice of redemption in accordance with Section 5.3 below toredeem the Notes in an aggregate amount equal to such Net Insurance/Condemnation Proceeds.     (c) Issuance of Equity Securities. Not later than the second Business Day followingthe date of receipt by the Company or any of its Subsidiaries of any cash proceedsfrom a
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capital contribution to, or the issuance of any Capital Stock of, the Company or any ofits Subsidiaries to any Person other than the Company or any of its Subsidiaries, the Company shallsend a notice of redemption in accordance with Section 5.3 below and redeem the Notes in anaggregate amount equal to 100% of such proceeds, net of underwriting discounts and commissions andother reasonable costs and expenses associated therewith, including reasonable legal fees andexpenses.     (d) Issuance of Debt. Not later than the second Business Day following the date ofreceipt by the Company or any of its Subsidiaries of any cash proceeds from incurrence of anyindebtedness of the Company or any of its Subsidiaries, the Company shall send a notice ofredemption in accordance with Section 5.3 below and shall redeem the Notes in an aggregate amountequal to 100% of such proceeds, net of underwriting discounts and commissions and other reasonablecosts and expenses associated therewith, including reasonable legal fees and expenses.     (e) Redemption Price; Redemption Date. Each redemption pursuant to this Section 5.2shall be made at 100% of the principal amount, plus accrued and unpaid interest to the redemptiondate. The redemption date for each such redemption shall be a date that is not less than 5 daysnor more than 10 days after the date the respective notice of redemption shall have been requiredto be sent.     (f) Pro Rata Redemption. In the event that the Company is required to redeem theNotes pursuant to clauses (a) through (d) of this Section 5.2, and the proceeds required to be usedto redeem the Notes are not sufficient to redeem all of the Notes then outstanding, the Companyshall purchase from each Noteholder an aggregate principal amount of Notes equal to (1) theaggregate principal amount of Notes required to be redeemed pursuant to Section 5.2 hereof,multiplied by (2) the quotient of: (A) the aggregate principal amounts of Notes registered in thename of such Noteholder pursuant to Section 2.1 of the Notes, divided by (B) the aggregateprincipal amount of Notes then outstanding. For the avoidance of doubt, pursuant to Section5.2(e) hereof, the Company shall also pay the accrued and unpaid interest to the redemption date oneach of the redeemed Notes.     Section 5.3. Notice of Redemption.     Notice of redemption shall be given by first-class mail, postage prepaid, mailed not less than10 nor more than 40 days prior to the Redemption Date, to the Holder at the Holder’s addressappearing in the Register.     All notices of redemption shall state:     (i) the date on which this Note will be redeemed (the “RedemptionDate”);     (ii) that on the Redemption Date the amount required to be paid in respect ofsuch redemption in accordance with Section 5.1 or 5.2, as applicable (the“Redemption Price”) will become due and payable in respect of this Note andall
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other Senior Secured Increasing Rate Notes, the amount of the RedemptionPrice, and that interest thereon will cease to accrue on and after said date; and     (iii) the place or places (which shall in no event be outside the continentalUnited States) where the Note is to be surrendered for payment of the RedemptionPrice.     Section 5.4. Notes Payable on Redemption Date. A notice of redemption having beengiven as aforesaid, this Note shall on the Redemption Date become due and payable at the RedemptionPrice therein specified, and from and after such date (unless the Company shall default in thepayment of the Redemption Price) shall cease to bear interest. Upon surrender of this Note forredemption in accordance with said notice, this Note shall be paid by the Company at the RedemptionPrice.     If this Note is called for redemption and the Redemption Price for the Note is not paid infull on the Redemption Date upon surrender thereof for redemption, then the Redemption Date shallbe deemed not to have occurred and in that case (x) the Company will be required to comply with allprovisions of this Article 5 in order to redeem this Note as if the notice required by thisSection 5.3 had not been delivered, (y) all payments of the Redemption Price shall beallocated first to any accrued and unpaid interest to the Redemption Date and then to the unpaidprincipal amount of this Note and (z) the unpaid principal amount of this Note shall, until paid,continue to bear interest at the rate prescribed herein, and all other terms and conditions of thisNote shall continue to apply.**ARTICLE 6****CHANGE OF CONTROL OFFER**     Section 6.1. Change of Control Offer. (a) Upon a Change of Control, the Holdershall have the right to require that the Company repurchase all or any part (equal to $1,000 or anintegral multiple thereof) of the Note at a purchase price in cash equal to 101% of the principalamount thereof plus accrued and unpaid interest thereon, if any, to the date of repurchase (the“Change of Control Put Price”) (subject to the right of the Holder to receive interest dueon the relevant interest payment date) in accordance with the terms contemplated in Section6.1(b).     (b) Within five Business Days following any Change of Control, the Company shall mail a noticeto the Holder (the “Change of Control Offer”) stating:     (i) that a Change of Control has occurred and that the Holder has the right torequire the Company to purchase all or a portion (equal to $1,000 or an integralmultiple thereof) of the Note at a purchase price in cash equal to 101% of theprincipal amount thereof, plus accrued and unpaid interest to the date of repurchase(subject to the right of the Holder to receive interest due on the relevant interestpayment date if prior to the date of repurchase);     (ii) the circumstances and relevant facts and financial information regardingsuch Change of Control;
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     (iii) the repurchase date (which shall be no earlier than 30 days (or suchshorter time period as may be permitted under applicable laws, rules andregulations) nor later than 60 days from the date such notice is mailed); and     (iv) the instructions reasonably determined by the Company, consistent withthis Section 6.01, that the Holder must follow in order to have this Notepurchased.     (c) If the Holder elects to have the Note purchased, the Holder shall be required to (1)complete and manually sign the notice on the back of this Note (or complete and manually sign afacsimile of such notice) and deliver such notice to the Company and (2) surrender the Note to theCompany at the address specified in the notice at least three Business Days prior to the purchasedate. The Holder shall be entitled to withdraw its election if the Company receives not later thanone Business Day prior to the purchase date a telegram, telex, facsimile transmission or lettersetting forth the name of the Holder, the principal amount of the Note which was delivered forpurchase by the Holder and a statement that the Holder is withdrawing his election to have the Notepurchased. The Company will issue to the Holder a new Note equal in principal amount to suchunpurchased portion.     (d) On the purchase date, the Note, or any portion thereof, purchased by the Company underthis Section 6.1 shall be cancelled, and the Company shall pay the purchase pricedetermined pursuant to Section 6.1(b)(i) to the Holder.     (e) The Company shall comply, to the extent applicable, with the requirements of Section 14(e)of the Exchange Act and any other securities laws or regulations in connection with the repurchaseof the Note pursuant to this Section 6.1. To the extent that the provisions of anyapplicable securities laws or regulations require the Company to act in a manner that conflictswith provisions of this Note relating to Change of Control Offers, the Company shall comply withthe applicable securities laws and regulations and shall not be deemed to have breached itsobligations under this Section 6.1 by virtue thereof.**ARTICLE 7****EVENTS OF DEFAULT**     Section 7.1. Events of Default. The following shall be Events of Default:     (a) The Company or any Guarantor defaults in any payment of interest on any Senior SecuredIncreasing Rate Note, and such default continues for a period of 3 days;     (b) The Company or any Guarantor (i) defaults in the payment of the principal of any SeniorSecured Increasing Rate Note when the same becomes due and payable at its Maturity Date, uponrequired redemption or repurchase, upon declaration or otherwise, or (ii) fails to redeem orpurchase Notes when required pursuant to the terms hereof;     (c) The Company or any Guarantor fails to comply with Article 6 or Section 5.2hereof;
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     (d) The Company or any Guarantor fails to comply with any of its covenants in this Note or anyTransaction Document (other than those referred to in paragraphs (a), (b) or(c) above) and such failure continues for 60 days after written notice of such failureshall have been delivered to the Company by a Noteholder or the Security Trustee;     (e) The Company or any Subsidiary pursuant to or within the meaning of any Bankruptcy Law orotherwise shall be liquidated, dissolved, adjudicated insolvent, or shall fail to pay, or shalladmit in writing its inability to pay its debts as they mature, or shall make a general assignmentfor the benefit of creditors; or the Company or any Subsidiary shall apply for or consent to theappointment of any receiver, custodian, trustee or similar officer for it or for all or anysubstantial part of its property, or such receiver, custodian, trustee or similar officer shall beappointed without the application or consent of the Company or any Subsidiary; or the Company orany Subsidiary shall institute (by petition, application, answer, consent or otherwise), or takeany action to authorize the institution of, any bankruptcy, insolvency, reorganization,dissolution, liquidation or similar proceeding relating to the Company or any Subsidiary under thelaws of any jurisdiction or takes any comparable action under any foreign laws relating toinsolvency; or any such proceeding shall be instituted (by petition, application or otherwise)against the Company or any Subsidiary and such proceeding shall not be dismissed within 60 daysafter being instituted;     (f) (i) Any Security Document or any security interest granted thereby shall be held in anyjudicial proceeding to be unenforceable or invalid, or not perfected, or shall cease or fail forany reason to be in full force and effect or to create or constitute a security interest with thepriority and effect required under the Security Trust Agreement and such default or failurecontinues for 10 days after written notice, or (ii) the Company or any Guarantor, or any Personacting on behalf of such Guarantor, shall deny or disaffirm its obligations under this Note or anySecurity Document;     (g) A representation or warranty made or repeated by the Company or any Guarantor in or inconnection with this Note or any Security Document or in any certificate or statement delivered byor on behalf of the Company or any Guarantor under or in connection with this Note or any SecurityDocument is incorrect in any material respect when made or deemed to have been made or repeated;     (h) The Company and its Subsidiaries (taken as a whole) cease to carry on all or a substantialpart of its business;     (i) Any litigation, arbitration or administrative proceedings of or before any court, arbitralbody or agency have been started against the Company or any Subsidiary where there is a reasonablelikelihood of an adverse outcome to the Company or any Subsidiary where that outcome is of a naturewhich would have a Material Adverse Effect; or     (j) All or a material part of the undertakings, assets, rights or revenues of, or shares orother ownership interests in, the Company or any material Subsidiary are seized, expropriated,nationalised or otherwise compulsory acquired by or under the authority of any government orgovernment entity.
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     Section 7.2. Acceleration of Maturity; Rescission and Annulment. If an Event ofDefault (other than an Event of Default specified in Section 7.1(e)) occurs and iscontinuing, then and in every such case the Majority Noteholders may declare the principal of, andall accrued and unpaid interest under, all Senior Secured Increasing Rate Notes, including thisNote, to be due and payable immediately, by a notice in writing to the Company, and upon any suchdeclaration such principal and interest shall become due and payable immediately. If an Event ofDefault specified in Section 7.1(e) occurs, the principal of and interest on this Noteshall *ipso facto*become and be immediately due and payable in cash without any declaration or otheract on the part of any Holders.     Notwithstanding any of the foregoing, at any time after such a declaration of acceleration hasbeen made and before a judgment or decree for payment of the money due has been obtained, theMajority Noteholders may rescind and annul such declaration and its consequences by notice to theCompany in writing of their desire to do so. No such rescission and annulment shall affect anysubsequent default or impair any right consequent thereon.**ARTICLE 8****COVENANTS**     Section 8.1. Payment of Notes. The Company shall promptly pay the principal of andinterest on this Note on the dates and in the manner provided herein. The Company shall, to theextent lawful, pay interest on overdue principal and overdue installments of interest to the extentand in the manner set forth in Section 1.1(g) of this Note.     Section 8.2. Compliance with Bye-Laws. The Company shall, and shall cause all ofits Subsidiaries to, comply with all of the terms and conditions of Section 76A and Schedule 2 ofthe Bye-Laws.     Section 8.3. Compliance Certificate. The Company shall deliver to the Holder within120 days after the end of each fiscal year of the Company an Officers’ Certificate stating that inthe course of the performance by the signers of their duties as Officers of the Company they wouldnormally have knowledge of any Default and whether or not the signers know of any Default thatoccurred during such period. If they do, the certificate shall describe the Default, its statusand what action the Company is taking or proposes to take with respect thereto.**ARTICLE 9****DEFINITIONS**     Section 9.1. Definitions. The following terms shall have the meanings set forthbelow:     “Additional Notes” means additional Senior Secured Increasing Rate Notes due 2007,having terms and conditions identical to those of this Note, and which are issued in face
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amountequal to interest that would otherwise be payable in cash on this Note or on such Notes or anyother Senior Secured Increasing Rate Note.     “Affiliate” of any specified Person means any other Person, directly or indirectly,controlling or controlled by or under direct or indirect common control with such specified Person.For the purposes of this definition, “control” when used with respect to any Person means thepower to direct the management and policies of such Person, directly or indirectly, whether throughthe ownership of voting securities, by contract or otherwise; and the terms “controlling” and“controlled” have meanings correlative to the foregoing.     “Asset Sale” means the sale by the Company or any of its Subsidiaries to any Personother than Company or any of its wholly-owned Subsidiaries of (i) any of the Capital Stock of anyof the Company’s Subsidiaries, (ii) all or substantially all of the assets of any division or lineof business of the Company or any of its Subsidiaries, or (iii) any other assets (whether tangibleor intangible) of the Company or any of its Subsidiaries (other than inventory sold in the ordinarycourse of business).     “Bankruptcy Law” means Title 11, United States Code, or any similar Federal, state orforeign law for the relief of debtors.     “Board of Directors” means the Board of Directors or any committee thereof dulyauthorized to act on behalf of the Board of Directors.     “Business Day” means each day which is not a Legal Holiday.     “Bye-Laws” means the Bye-Laws of the Company.     “Capital Stock” of any Person means any and all shares, partnership, membership orother interests, participations or other equivalents of or interests in (however designated) equityof such Person, including any Preferred Stock (but excluding any debt securities convertible intosuch equity) and any rights to purchase, warrants, options or similar interests with respect to theforegoing.     “Change of Control” means the occurrence (x) of a Liquidity Event (as defined in theExisting Notes), (y) of the adoption of a plan relating to the liquidation or dissolution of theCompany, or (z) at any time following the occurrence of a Liquidity Event, of any of the followingevents:     (a) (i) any “person” (as such term is used in Section 13(d)(3) of the Exchange Act), otherthan one or more Permitted Holders, becomes the beneficial owner (as defined inRules 13d-3 and 13d-5 under the Exchange Act, except that a person shall be deemed to have“beneficial ownership” of all shares that any such person has the right to acquire, whether suchright is exercisable immediately or only after the passage of time), directly or indirectly, ofmore than 40% of the total voting power of the Voting Stock of the Company, whether as a result ofissuance of securities of the Company, any merger, consolidation, liquidation or dissolution of theCompany, any direct or indirect transfer of securities by any Permitted Holder or otherwise, and(ii) the Permitted Holders “beneficially own” (as defined in clause (i) above), directly orindirectly, in the aggregate a lesser percentage of the total voting power of the Voting Stock ofthe
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Company, than such other person and do not have the right or ability by voting power, contractor otherwise to elect or designate for election a majority of the Board of Directors; or     (b) during any period of two consecutive years, individuals who at the beginning of suchperiod constituted the Board of Directors (together with any new directors or members of suchgoverning body, as the case may be, whose designation or election to such Board of Directors, orwhose nomination for election by the shareholders of the Company, (x) was approved by a vote of amajority of the directors of the Company then still in office who were either directors or membersof such governing body, as the case may be, at the beginning of such period or whose election ornomination for election was previously so approved or (y) was effected in accordance with Sections83A, 83B and 83C of the Bye-Laws), cease for any reason to constitute a majority of the Board ofDirectors, then in office; or     (c) the merger or consolidation of the Company with or into another Person or the merger ofanother Person with or into the Company, or the sale of all or substantially all the assets of theCompany to another Person (other than a Person that is controlled by the Permitted Holders), and,in the case of any such merger or consolidation, the securities of the Company that are outstandingimmediately prior to such transaction and which represent 100% of the aggregate voting power of theVoting Stock of the Company are changed into or exchanged for cash, securities or property, unlesspursuant to such transaction such securities are changed into or exchanged for, in addition to anyother consideration, securities of the surviving Person or transferee that represent immediatelyafter such transaction, at least a majority of the aggregate voting power of the Voting Stock ofthe surviving Person or transferee or a Person controlling such surviving Person or transferee.     “Change of Control Offer” has the meaning set forth in Section 6.1(b).     “Change of Control Put Price” has the meaning set forth in Section 6.1(a).     “Closing Date” means April 3, 2007.     “Common Shares” means the Common Shares of the Company, par value $0.01 per share.     “Company” has the meaning set forth in the preamble.     “Deed of Priorities” means the Deed of Priorities dated June 23, 2005 by and betweenthe Security Trustee, as security trustee for the Initial Purchasers, and The Law Debenture TrustCompany, p.l.c., as security trustee for the holders of the Existing Notes.     “Default” means any event which is, or after notice or passage of time or both wouldbe, an Event of Default.     “Event of Default” has the meaning set forth in Section 7.1.     “Exchange Act” means the Securities Exchange Act of 1934, as amended.
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     “Existing Notes” means the Company’s 8% Convertible Senior Secured Notes due 2014.     “Guarantee” means any obligation, contingent or otherwise, of any Person directly orindirectly guaranteeing any indebtedness of any other Person and any obligation, direct orindirect, contingent or otherwise, of such Person (a) to purchase or pay (or advance or supplyfunds for the purchase or payment of) such indebtedness of such other Person (whether arising byvirtue of partnership arrangements, or by agreement to keep-well, to purchase assets, goods,securities or services, to take-or-pay, or to maintain financial statement conditions or otherwise)or (b) entered into for purposes of assuring in any other manner the obligee of such indebtednessof the payment thereof or to protect such obligee against loss in respect thereof (in whole or inpart); *provided*, *however*, that the term “Guarantee” shall not include endorsements forcollection or deposit in the ordinary course of business. The term “Guarantee” used as averb has a corresponding meaning.     “Guarantors” means VTL (UK) Limited, Viatel Broadband Limited, Viatel InternetLimited, and each other Subsidiary that may issue a Guarantee of this Note under the Security TrustAgreement or other guarantee agreement.     “Holder” has the meaning set forth in the preamble, as further described inSection 2.1.     “Initial Purchasers” means the “Purchasers” as defined in the Purchase Agreement.“Interest Payment Date” has the meaning set forth in Section 1.1(b).     “Legal Holiday” is a Saturday, a Sunday or other day on which banking institutions arenot open for general business in London or New York.     “Letter Agreement” means that certain Letter Agreement dated as of June 23, 2005, byand between the Company, the holders of the Existing Notes and the Initial Purchasers.     “Majority Noteholders” means, at any time, the Noteholders holding a majority of theprincipal amount of the Senior Secured Increasing Rate Notes outstanding at such time.     “Material Adverse Effect” means a material adverse effect on the assets, liabilities,business, condition (financial or otherwise), results of operations or prospects of the Company andits Subsidiaries taken as a whole, or any other circumstance that in any manner would be expectedto materially adversely affect the interests of the Holder in the Note.     “Maturity Date” has the meaning set forth in the preamble.     “Morgan Stanley” means Morgan Stanley & Co. Incorporated.     “Net Asset Sale Proceeds” means, with respect to any Asset Sale, an amount equal to:(i) cash payments (including any Cash received by way of deferred payment pursuant to, or bymonetization of, a note receivable or otherwise, but only as and when so received) received
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by theCompany or any of its Subsidiaries from such Asset Sale, minus (ii) any bona fide directcosts (including, without limitation, transaction costs) incurred in connection with such AssetSale, including (a) all income or gains taxes payable at any time by the seller as a result of anygain recognized in connection with such Asset Sale, (b) payment of the outstanding principal amountof, premium or penalty, if any, and interest on any Indebtedness (other than the Senior SecuredIncreasing Rate Notes) that is secured by a Security Interest on the stock or assets in questionand that is required to be repaid under the terms thereof as a result of such Asset Sale and (c) areasonable reserve for any indemnification payments (fixed or contingent) attributable to seller’sindemnities and representations and warranties to purchaser in respect of such Asset Saleundertaken by the Company or any of its Subsidiaries in connection with such Asset Sale.     “Net Insurance/Condemnation Proceeds” means an amount equal to: (i) any cash paymentsor proceeds received by the Company or any of its Subsidiaries (a) under any casualty insurancepolicy in respect of a covered loss thereunder or (b) as a result of the taking of any assets ofthe Company or any of its Subsidiaries by any Person pursuant to the power of eminent domain,condemnation or otherwise, or pursuant to a sale of any such assets to a purchaser with such powerunder threat of such a taking, minus (ii) (a) any actual and reasonable costs incurred bythe Company or any of its Subsidiaries in connection with the adjustment or settlement of anyclaims of the Company or such Subsidiary in respect thereof, and (b) any bona fide direct costsincurred in connection with any sale of such assets as referred to in clause (i)(b) of thisdefinition, including income taxes payable as a result of any gain recognized in connectiontherewith and (c) any amounts required to be applied to the repayment of any indebtedness securedby a lien which is prior to any liens of the Noteholders on the asset or assets that are subject tothe taking, condemnation or casualty *but excluding, however*, an aggregate of $1,000,000 of suchproceeds.     “Note Documents” means this Note, the Security Trust Agreement, the Deed of Prioritiesand the Security Documents.     “Noteholders” means all registered owners of the Senior Secured Increasing Rate Notes.     “Notes” means this Note, as amended, supplemented, extended, restated, renewed,replaced, refinanced or otherwise modified, in each case from time to time and whether in whole orin part. “Notes” means the collective reference to the Company’s Senior Secured IncreasingRate Notes Due 2007, issued July 1, 2005, as amended (the “2005 Notes”), the Company’sTranche A Senior Secured Increasing Rate Notes Due 2007, issued March 14, 2006, as amended (the“March 2006 Notes”), the Company’s Tranche B Senior Secured Increasing Rate Notes Due 2007,issued December 21, 2006, as amended (the “December 2006 Notes”), and the Company’s TrancheC Senior Secured Increasing Rate Notes Due 2007, issued April 3,2007 (the “April 2007 Notes”) and all Additional Notes (as defined in each of the 2005Notes, March 2006 Notes, December 2006 Notes and April 2007 Notes).     “Obligations” means all obligations of the Company and the Guarantors under this Noteand the other Note Documents, including obligations to the Security Trustee, whether for payment ofprincipal of or interest on this Note and all other monetary obligations of the
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Company and theGuarantors under this Note and the other Note Documents, whether for fees, expenses,indemnification or otherwise.     “Officer” means the Chairman of the Board, the Chief Executive Officer, the ChiefFinancial Officer, the President, any Vice President, the Treasurer, any Assistant Treasurer, theSecretary or any Assistant Secretary of the Company. “Officer” of a Guarantor has a correlativemeaning.     “Officers’ Certificate” means a certificate signed by two Officers of each Personissuing such certificate. For the avoidance of doubt, any Officers’ Certificate to be delivered bythe Company pursuant to this Note shall be signed by two Officers of the Company.     “Permitted Holders” means Morgan Stanley and its Affiliates and any Person acting inthe capacity of an underwriter in connection with a public or private offering of the Company’sCapital Stock.     “Person” means any individual, corporation, partnership, limited liability company,joint venture, association, joint-stock company, trust, unincorporated organization, government orany agency or political subdivision thereof or any other entity.     “Preferred Stock”, as applied to the Capital Stock of any Person, means Capital Stockof any class or classes (however designated) that is preferred as to the payment of dividends, oras to the distribution of assets upon any voluntary or involuntary liquidation or dissolution ofsuch Person, over shares of Capital Stock of any other class of such Person.     “Purchase Agreement” means the Investment and Note Purchase Agreement, dated as ofJune 23, 2005, by and among the Company and the Initial Purchasers.     “Redemption Date” has the meaning set forth in Section 5.3(i).     “Redemption Price” has the meaning set forth in Section 5.1.     “Register” has the meaning set forth in Section 2.1.     “Securities Act” means the Securities Act of 1933, as amended.     “Security Documents” means the Security Trust Agreement and any mortgages, charges,assignments or other Security Interests from time to time granted by the Company or the Guarantorsto the Security Trustee pursuant to the Security Trust Agreement or any other such securitydocument.     “Security Interest” means any mortgage, sub-mortgage, security assignment, standardsecurity, charge, sub-charge, pledge, lien, right of set-off or other encumbrance or securityinterest of any kind, however created or arising.     “Senior Secured Increasing Rate Notes” means this Note and each other Senior SecuredIncreasing Rate Note of the Company issued on the date of issuance set forth above pursuant to thePurchase Agreement.
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     “Security Trust Agreement” means the Security Trust and Intercreditor Deed, dated asof June 23, 2005, as amended, by and among the Company, the Guarantors, the Security Trustee andthe Noteholders.     “Security Trustee” means The Law Debenture Trust Corporation p.l.c. and its successorsand assigns under the Security Trust Agreement.     “Subsidiary” of any Person means any corporation, association, partnership or otherbusiness entity of which more than 50% of the total Voting Stock is at the time owned orcontrolled, directly or indirectly, by (a) such Person, (b) such Person and one or moreSubsidiaries of such Person or (c) one or more Subsidiaries of such Person.     “Transaction Documents” means the Senior Secured Increasing Rate Notes, the PurchaseAgreement, the Security Documents, and the Letter Agreement, the Deed of Priorities.     “transfer” has the meaning set forth in Section 2.2.     “Voting Stock” of a Person means all classes of Capital Stock or other interests(including partnership interests) of such Person then outstanding and normally entitled at the timeto vote in the election of directors, managers or trustees thereof.     Section 9.2. Interpretation. Unless the context otherwise requires:     (i) a term has the meaning assigned to it;     (ii) an accounting term not otherwise defined has the meaning assigned to it inaccordance with generally accepted accounting principles;     (iii) references to “generally accepted accounting principles” shall meangenerally accepted accounting principles in effect as of the time when and for theperiod as to which such accounting principles are to be applied;     (iv) “or” is not exclusive;     (v) words in the singular include the plural, and in the plural include thesingular;     (vi) provisions apply to successive events and transactions;     (vii) “including” means including without limitation; and     (viii) any definition of or reference to any agreement, instrument or otherdocument herein shall be construed as referring to such agreement, instrument orother document as from time to time amended, supplemented or otherwise modified.
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**ARTICLE 10****MISCELLANEOUS**     Section 10.1. Notices. Any notice or communication to be given according to theterms of this Note shall be governed by the terms and conditions for the giving of notices underSection 9.04 of the Purchase Agreement. Failure to mail a notice or communication to a Noteholderor any defect in it shall not affect its sufficiency with respect to other Noteholders.     Section 10.2. No Recourse Against Others. A director, officer, employee, creditor orshareholder, as such, of the Company shall not have any liability for any obligations of theCompany under this Note or for any claim based on, in respect of or by reason of such obligationsor their creation. Each Noteholder by accepting a Note waives and releases all such liability.The waiver and release are part of the consideration for the issuance of this Note.     Section 10.3. Amendment. The provisions of this Note may be amended, modified orwaived if the Majority Noteholders shall, by written consent delivered to the Company, consent tosuch amendment, modification or waiver; *provided*, *however*, that no such waiver shall extend to oraffect any covenant set forth herein except to the extent so expressly waived and, until suchwaiver shall become effective, the obligations of the Company in respect of any such covenant shallremain in full force and effect; and *provided further*that no such amendment, modification orwaiver (i) which would modify any requirement hereunder that any particular action be taken by allof the Noteholders, or by Noteholders of a specified percentage of the aggregate principal amountof the outstanding Senior Secured Increasing Rate Notes, shall be effective unless consented to byall of the Noteholders or by Noteholders of such specified percentage, respectively, or (ii) whichwould extend the due date for, or reduce the amount of, or form of, any payment of principal of orinterest on any Senior Secured Increasing Rate Note shall be made without the consent of theNoteholder of such Senior Secured Increasing Rate Note. Any such amendment, modification or waiverconsented to by the Majority Noteholders shall be binding on all Noteholders.     Section 10.4. Governing Law; Jurisdiction; Waiver of Trial by Jury. (a) This Noteshall be construed in accordance with the internal laws of the State of New York without regard tothe conflicts of laws provisions thereof. The Company hereby irrevocably submits to thejurisdiction of any court of the State of New York located in the County of New York or the UnitedStates District Court for the Southern District of the State of New York, any appellate courts fromany thereof (any such court, a “New York Court”) or any court of the United Kingdom locatedin London, or any appellate courts from any thereof (any such court, a “U.K. Court”), forthe purpose of any suit, action or other proceeding arising out of or relating to this Note orunder any applicable securities laws and arising out of the foregoing, which is brought by oragainst the Company, and the Company hereby irrevocably agrees that all claims in respect of anysuch suit, action or proceeding will be heard and determined in any New York Court orU.K. Court. The Company hereby agrees not to commence any action, suit or proceeding relatingto this Note other than in a New York Court except to the extent mandated by applicable law. TheCompany hereby waives any objection that it may now or hereafter have to the venue of any suchsuit, action or proceeding in any such court or that such suit, action or proceeding was brought inan inconvenient court and agree not to plead or claim the same. EACH PARTY TO THIS NOTE HEREBYEXPRESSLY WAIVES ANY RIGHT TO TRIAL BY JURY OF ANY
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CLAIM, DEMAND, ACTION OR CAUSE OF ACTION ARISINGUNDER THIS NOTE OR IN ANY WAY CONNECTED WITH OR RELATED OR INCIDENTAL TO THE DEALINGS OF THEPARTIES HERETO OR ANY OF THEM WITH RESPECT THIS NOTE, OR THE TRANSACTIONS RELATED HERETO, IN EACHCASE WHETHER NOW EXISTING OR HEREAFTER ARISING, AND WHETHER FOUNDED IN CONTRACT OR TORT OROTHERWISE; AND EACH PARTY HEREBY AGREES AND CONSENTS THAT ANY SUCH CLAIM, DEMAND, ACTION OR CAUSEOF ACTION SHALL BE DECIDED BY COURT TRIAL WITHOUT A JURY, AND THAT ANY PARTY TO THIS NOTE MAY FILEAN ORIGINAL COUNTERPART OR A COPY OF THIS SECTION WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENTOF THE SIGNATORIES HERETO TO THE WAIVER OF THEIR RIGHT TO TRIAL BY JURY.     (a) The submission to the jurisdiction referred to in the preceding paragraph shall not limitthe right of the Holder to take proceedings against the Company in courts of any other competentjurisdiction nor shall the taking of proceedings against the Company in any one or morejurisdictions preclude the taking of proceedings against the Company in any other jurisdiction(whether concurrently or not) if and to the extent permitted by applicable law.     (b) The Company agrees that the process by which any suit, action or proceeding is begun inconnection with this Note may be served on it at its principal place of business in the UnitedKingdom for the time being. If the Company ceases to have a principal place of business in theUnited Kingdom, it shall immediately appoint a further person in the United Kingdom to acceptservice of process on its behalf in such jurisdiction. Nothing contained herein shall affect theright of the Company or the Holder to serve process in any other manner permitted by law. Inaddition, the Company acknowledges and agrees that (a) it has, by separate letter, irrevocablyappointed CT Corporation System, as its authorized agent upon which process may be served in anysuit or proceeding against the Company arising out of or relating to this Note or under anysecurities laws of the United States or any state thereof and arising out of the foregoing, (b) ithas, prior to the date hereof, paid such agent an amount in cash sufficient to procure such agent’sservices for three years from the date hereof and (c) service of process upon such agent, andwritten notice of said service to the Company by the person serving the same to the addressprovided above, shall be deemed in every respect effective service of process upon the Company inany such suit or proceeding. The Company agrees to take any and all action as may be necessary tomaintain such designation and appointment of such agent in full force and effect for a period of atleast three years from the date of this Note.     Section 10.5. Successors. All agreements of the Company in this Note shall bind itssuccessor.     Section 10.6. Severability. If any one or more of the provisions contained in thisNote shall, for any reason, be held to be invalid, illegal or unenforceable in any respect, suchinvalidity, illegality or unenforceability shall not affect any other provisions of this Noteand such provision shall be interpreted to the fullest extent permitted by the law; *provided*thatthe Company and the Holder shall use their reasonable best efforts to find and employ analternative means to achieve the same or substantially the same result as that contemplated by suchprovision.
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     Section 10.7. Headings, etc. The headings of the Articles and Sections of this Notehave been inserted for convenience of reference only, are not to be considered a part hereof, andshall in no way modify or restrict any of the terms or provisions hereof.     Section 10.8. Enforcement. The Company agrees to pay all fees (including legal fees)and expenses which the Holder may reasonably incur as a result of any contest by the Holder of theliability of the Company under any provision of this Note in which a final and non-appealabledecision or settlement is made that the Company is liable to the Holder in substantially such amanner as is claimed by the Holder.     Section 10.9. Specific Performance. The Company acknowledges that the Holder wouldnot have an adequate remedy at law for money damages in the event that the terms of this Note werenot performed in accordance with its terms, and therefore agrees that the Holder shall be entitledto (in addition to any other remedy to which the Holder may be entitled, at law or in equity)injunctive relief, including specific performance, to enforce such obligations, without the postingof any bond and if any action should be brought in equity to enforce any of the provisions of thisNote, the Company shall not raise the defense that there is an adequate remedy at law.     Section 10.10. Non-Waiver; Remedies Cumulative. Holder shall not, by any act ofomission or commission, be deemed to waive any of its rights or remedies hereunder unless suchwaiver be in writing and signed by Holder and then only to the extent specifically set forththerein; a waiver on one occasion shall not, except as specifically set forth therein, be construedas continuing or as a bar to or waiver of a right or remedy on any other occasion. All remediesconferred upon Holder by this Note shall be cumulative and none is exclusive, and such remedies maybe exercised concurrently or consecutively at Holder’s option.     Section 10.11. Waiver. The Company hereby waives presentment for payment, protestand demand, and, except as specifically set forth or required herein or hereunder, notice ofprotest, intent, demand, dishonor and nonpayment of this Note and all other notices of any kind.     Section 10.12. Assignment. This Note and the rights, duties and obligationshereunder may not be assigned or delegated by the Company without the prior written consent of theHolder.     Section 10.13. Entire Agreement. This Note and the agreements, documents andinstruments executed in connection herewith, constitutes the entire agreement of the Company andthe Holder with respect to the subject matter hereof and supersedes all prior and contemporaneousagreements, representations, understandings, negotiations and discussionsbetween the Company and the Holder, whether oral or written, with respect to the subjectmatter hereof.
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     Section 10.14. Time of the Essence. Time is of the essence with respect to all ofthe obligations and agreements specified in this Note.      VIATEL HOLDING (BERMUDA) LIMITED