Document:

<PAGE>   1
                                                                   EXHIBIT 10.20

                                 FIRST AMENDMENT
                             TO EMPLOYMENT AGREEMENT

     This First Amendment to the Employment Agreement effective as of January 1,
2000, (this "Amendment") is entered into by and between Advance Paradigm, Inc.
(the "Company") and John H. Sattler (the "Employee").

     WHEREAS, the Company and Employee (collectively, the "Parties") entered
into that certain Employment Agreement effective as of November 14, 1996 (the
"Agreement");

     WHEREAS, the Parties now desire to amend the Agreement to change the
Employee's compensation, add certain restrictive covenants and extend the term
of the Agreement;

    NOW, THEREFORE, in consideration of the premises and other good and valuable
consideration, the receipt and sufficiency is hereby acknowledged, the parties
hereby agree to the following:

     1.  SECTION 2. TERM. The term provision set forth in Section 2 of the
         Agreement is hereby amended and restated in its entirety as follows:

         "The employment of Employee shall commence on the Effective Date and
         shall end on December 31, 2002 (the "Term")."

     2.  SECTION 3. COMPENSATION. The compensation provisions set forth in
         Sections 3(a) and 3(b) of the Agreement are hereby amended and restated
         in their entirety as follows:

         "(a)     Salary. Employee shall receive annual salary of Two Hundred
                  Fifteen Thousand dollars ($215,000) ("Base Salary"), to be
                  paid in biweekly installments in accordance with the Company's
                  salary payment practices in effect from time to time for
                  senior managers of the Company. The Base Salary may be
                  reviewed by the Board from time to time to determine the
                  amount of any increases.

         (b)      Bonus Payments. Employee will be entitled to participate in
                  the Company's incentive compensation plan for an annual bonus
                  based on the Company's audited financial performance for the
                  fiscal year as well as Employee's individual contribution to
                  the Company. The performance criteria used to calculate the
                  Employee's Annual Bonus during the Employment Period shall be
                  determined by the Employer and will be established with a
                  targeted bonus of 50% of Employee's Salary per annum. Any
                  Annual Bonus payable with respect to a fiscal year shall be
                  subject to the approval of the Compensation Committee of the
                  Board of Directors and shall be paid in accordance with the
                  Employer's normal payroll practices."

     3.  SECTION 18. RESTRICTIONS ON COMPETITIVE EMPLOYMENT. A new Section 18 is
         hereby added to the Agreement as follows:

         "During the term of Employee's employment and for the twelve-month
         period following termination of Employee's employment, except with the
         express written consent of the Board of Directors or the Chief
         Executive Officer of the Company, Employee will not,

<PAGE>   2

         become engaged in, render services to, permit Employee's name to be
         used in connection with, own, manage, operate, control, be employed by,
         participate in, consult with, or be connected in any manner, whether as
         an officer, director, employee, agent, consultant, stockholder (other
         than as the holder of less than 2% of the aggregate outstanding shares
         of a class of equity securities publicly traded on a national
         securities exchange or quotation system) or other capacity with the
         ownership, management, operation or control of, any business or
         enterprise engaged or about to become engaged in the Business of the
         Company. The Business of the Company includes, but is not limited to,
         all those products and services that are presently or hereafter
         marketed by the Company, or that are in the development stage at the
         time of termination of Employee's employment and are actually marketed
         by the Company and/or it affiliates thereafter, as well as, the
         following businesses: (i) the third party prescription drug claims
         processing business; (ii) the organization and administration of retail
         pharmacy networks; (iii) the design, development or marketing of or
         consulting as to, prescription drug benefit plans; (iv) the provision
         of mail service pharmacy; (v) the collection, analysis and/or sale of
         data relating to prescription drug utilization; (vi) formulary
         management and rebate administration services; (vii) disease state
         management, case management or demand management services and (viii)
         any other business in which the Company and/or any of its affiliates is
         then engaged."

     4.  EXHIBIT A. FRINGE BENEFITS

         The following section is hereby added to Exhibit A:

         1. (c) Employee shall be granted an incentive option (the "Option") to
         purchase 30,000 shares of the Common Stock (the "Shares") of the
         Company. The Option shall be subject to approval by the Company's Board
         of Directors and granted pursuant to the provisions of the Company's
         Amended and Restated Incentive Stock Option Plan. The Option shall vest
         and become exercisable as to 20% of the shares on each of the first
         five anniversaries of the date of grant. The exercise price shall be
         the fair market value of the Common Stock of the Company as of the date
         of grant, as determined by averaging the closing price of the stock on
         the five (5) trading days preceding the date of grant. Excluding for
         purposes of this paragraph any transactions between the Company and any
         affiliate of the Company, if there is (i) a sale of substantially all
         of the Common Stock of the Company, (ii) a sale of substantially all of
         the assets of the Company, or (iii) a merger in which the Company is
         not to be the surviving corporation ("Change in Control"), this Option
         shall automatically fully vest immediately prior to the occurrence of
         the transaction giving rise to the vesting and, to the extent such
         transaction does not occur, the vesting shall be deemed rescinded and
         Employee shall again only be entitled to exercise the Option as set
         forth above.

         Section 2 of Exhibit A is hereby amended and restated in its entirety
as follows:

         "2. Car Allowance. Employee shall be provided a $600 per month car
         allowance. At year end, the value of this benefit will be reported as
         required by the IRS regulations on Employee's Form W-2."

    Except as specifically amended herein, the Agreement shall remain in full
force and effect.

<PAGE>   3

         IN WITNESS WHEREOF, the parties have caused this Amendment to be
executed and delivered by their proper and duly authorized officers as of the
date first above written. By executing this Amendment, the undersigned
individuals hereby warrant and represent that they have read this Amendment in
its entirety and agree to all of its terms.

                             ADVANCE PARADIGM, INC.

                             By:
                                 ----------------------------------------------
                             Name:   David D. Halbert
                             Title:  Chief Executive Officer

                             EMPLOYEE

                             --------------------------------------------------
                             John H. Sattler<PAGE>   1
                                                                    EXHIBIT 10.7

THIS DEMAND NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
MAY NOT BE SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT IN ACCORDANCE WITH
CONDITIONS SPECIFIED HEREIN.

                            HMTF BRIDGE VIATEL, LLC

                                  Demand Note

                                                                   Dallas, Texas

          FOR VALUE RECEIVED, the undersigned (the "Company") , a limited
liability company organized and existing under the laws of the State of
Delaware, hereby promises to pay to the order of HMEU Viatel Qualified Fund,
LLC, or registered assigns, the principal sum of seventy five million, eight
hundred and one thousand and forty four Dollars ($75,801,044.00) not later than
three business days after written demand for payment is delivered by the holder
hereof to the Company at its principal office (which is located at 200 Crescent
Court, Suite 1600, Dallas, Texas, on the date of this Note) , with simple
interest at a rate of 7% per annum. Interest will be paid at the time of payment
of the related principal or at the time this Note is otherwise surrendered by
the holder hereof for cancellation.

          Payments of principal and interest accrued on the principal being paid
to the date of payment are to be made at the home office of the Company, or such
other place as the holder of this Note shall have specified in writing to the
Company, in lawful money of the United States of America.

          This Note and the other Demand Notes being issued and dated the date
hereof are herein called the "Notes."

          The Company represents and warrants that:

          (i) it is a limited liability company duly organized, validly existing
     and in good standing under the laws of the State of Delaware and has all
     power and authority to own and lease its property and to conduct its
     business as presently conducted or contemplated; the Company is duly
     qualified to transact business as a foreign corporation in each
     jurisdiction in which the conduct of its business as presently conducted or
     its ownership or leasing of property makes such qualification necessary;

          (ii) the execution and delivery by the Company of the Notes have been
     duly authorized by all the necessary corporate action and the Notes
     constitute the valid and binding agreements of the Company enforceable in
     accordance with their terms except to the extent that enforcement may be
     limited by applicable bankruptcy, insolvency, moratorium or other similar
     laws of general application relating to or affecting the enforcement of
     creditors' rights generally from time to time in effect; and

          (iii) the execution and delivery of the Notes does not and will not
     contravene, or constitute a default under, any law or regulation, the
     limited liability company agreement of the Company or any agreement,
     judgement, injunction, order, decree or instrument binding upon the
     Company, or result in the creation or imposition of any lien, claim or
     encumbrance on any asset of the Company.

          If any of the following events shall occur:

<PAGE>   2

          (i) any representation or warranty made by the Company in this Note
     shall be false in any material respect on the date as of which made or the
     Company shall violate any covenant or agreement made by it in this Note;

          (ii) the Company shall make an assignment for the benefit of creditors
     or admit in writing its inability to pay off its debts as they become due;

          (iii) an order, judgement or decree shall be entered adjudicating the
     Company bankrupt or insolvent;

          (iv) the Company shall petition or apply to any tribunal for the
     appointment of a trustee, receiver or liquidator of the Company or of any
     substantial part of its assets, or commence any proceedings relating to the
     Company under and bankruptcy, reorganization arrangement, insolvency,
     readjustment of debt, dissolution or liquidation law of any jurisdiction,
     whether now or hereafter in effect;

          (v) any such petition or application shall be filed, or any such
     proceeding shall be commenced, against the Company and the Company by any
     act shall indicate its approval thereof, consent thereto or acquiescence
     therein, or any order, judgement or decree shall be entered appointing any
     such trustee, receiver or liquidator, or approving the petition in any such
     proceedings, and any such order, judgement or decree shall remain unstayed
     and in effect for more than 60 days; or

          (vi) any order, judgement or decree shall be entered in any proceeding
     against the Company decreeing the dissolution of the Company;

then, notwithstanding any provision herein to the contrary, this Note shall
thereupon be and become forthwith due and payable without demand or other notice
of any kind by the holder hereof or any other person.

          The Company promises to pay the following costs, expenses and
attorneys' fees paid or incurred by the holder of this Note, or adjudged by the
court:

          (a) reasonable costs of collection, costs and expenses and attorneys'
     fees paid or incurred in connection with the collection or enforcement of
     this Note, whether or not suit is filed; and

          (b) costs of suit and such sums as the court may adjudge as attorneys'
     fees in any action to enforce payment of this Note or any part of it.

          Upon surrender of this Note for registration of transfer, duly
endorsed, or accompanied by a written instrument of transfer duly executed, by
the registered holder hereof or his attorney duly authorized in writing, and
upon satisfaction of the Company that such transfer is exempt from registration
under the Securities Act of 1933, a new note for a like principal amount will be
issued to, and registered in the name of, the transferee. The Company may treat
the person in whose name this Note is registered as the owner hereof for the
purpose of receiving payment and for all other purposes, and the Company shall
not be affected by any notice to the contrary.

          No alteration, amendment or waiver of any provision of this Note, made
by agreement of the holder hereof and any other person or party, shall

<PAGE>   3

constitute a waiver of any term hereof, or otherwise release or discharge the
liability of the Company under this Note.

          This Note may not be modified, terminated or discharged nor shall any
waiver hereunder be effective unless in writing signed by the party against whom
the same is asserted.

          The provisions of this Note shall be construed and interpreted, and in
all rights and obligations hereunder determined, in accordance with the laws of
the State of New York.

                                              HMTF BRIDGE RHY, LLC

                                              By:  /s/ DAVID W. KNICKEL
                                                  -----------------------------
                                              Name:     David W. Knickel
                                                    ---------------------------
                                              Title:    Vice President
                                                     --------------------------

<PAGE>   4

THIS DEMAND NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
MAY NOT BE SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT IN ACCORDANCE WITH
CONDITIONS SPECIFIED HEREIN.

                            HMTF BRIDGE VIATEL, LLC

                                  Demand Note

                                                                   Dallas, Texas

          FOR VALUE RECEIVED, the undersigned (the "Company") , a limited
liability company organized and existing under the laws of the State of
Delaware, hereby promises to pay to the order of HMEU Viatel Private Fund, LLC,
or registered assigns, the principal sum of nine hundred and six thousand, three
hundred and sixty one Dollars ($906,361.00) not later than three business days
after written demand for payment is delivered by the holder hereof to the
Company at its principal office (which is located at 200 Crescent Court, Suite
1600, Dallas, Texas, on the date of this Note) , with simple interest at a rate
of 7.5% per annum. Interest will be paid at the time of payment of the related
principal or at the time this Note is otherwise surrendered by the holder hereof
for cancellation.

          Payments of principal and interest accrued on the principal being paid
to the date of payment are to be made at the home office of the Company, or such
other place as the holder of this Note shall have specified in writing to the
Company, in lawful money of the United States of America.

          This Note and the other Demand Notes being issued and dated the date
hereof are herein called the "Notes."

          The Company represents and warrants that:

          (i) it is a limited liability company duly organized, validly existing
     and in good standing under the laws of the State of Delaware and has all
     power and authority to own and lease its property and to conduct its
     business as presently conducted or contemplated; the Company is duly
     qualified to transact business as a foreign corporation in each
     jurisdiction in which the conduct of its business as presently conducted or
     its ownership or leasing of property makes such qualification necessary;

          (ii) the execution and delivery by the Company of the Notes have been
     duly authorized by all the necessary corporate action and the Notes
     constitute the valid and binding agreements of the Company enforceable in
     accordance with their terms except to the extent that enforcement may be
     limited by applicable bankruptcy, insolvency, moratorium or other similar
     laws of general application relating to or affecting the enforcement of
     creditors' rights generally from time to time in effect; and

          (iii) the execution and delivery of the Notes does not and will not
     contravene, or constitute a default under, any law or regulation, the
     limited liability company agreement of the Company or any agreement,
     judgement, injunction, order, decree or instrument binding upon the
     Company, or result in the creation or imposition of any lien, claim or
     encumbrance on any asset of the Company.

          If any of the following events shall occur:

<PAGE>   5

          (i) any representation or warranty made by the Company in this Note
     shall be false in any material respect on the date as of which made or the
     Company shall violate any covenant or agreement made by it in this Note;

          (ii) the Company shall make an assignment for the benefit of creditors
     or admit in writing its inability to pay off its debts as they become due;

          (iii) an order, judgement or decree shall be entered adjudicating the
     Company bankrupt or insolvent;

          (iv) the Company shall petition or apply to any tribunal for the
     appointment of a trustee, receiver or liquidator of the Company or of any
     substantial part of its assets, or commence any proceedings relating to the
     Company under and bankruptcy, reorganization arrangement, insolvency,
     readjustment of debt, dissolution or liquidation law of any jurisdiction,
     whether now or hereafter in effect;

          (v) any such petition or application shall be filed, or any such
     proceeding shall be commenced, against the Company and the Company by any
     act shall indicate its approval thereof, consent thereto or acquiescence
     therein, or any order, judgement or decree shall be entered appointing any
     such trustee, receiver or liquidator, or approving the petition in any such
     proceedings, and any such order, judgement or decree shall remain unstayed
     and in effect for more than 60 days; or

          (vi) any order, judgement or decree shall be entered in any proceeding
     against the Company decreeing the dissolution of the Company;

then, notwithstanding any provision herein to the contrary, this Note shall
thereupon be and become forthwith due and payable without demand or other notice
of any kind by the holder hereof or any other person.

          The Company promises to pay the following costs, expenses and
attorneys' fees paid or incurred by the holder of this Note, or adjudged by the
court:

          (a) reasonable costs of collection, costs and expenses and attorneys'
     fees paid or incurred in connection with the collection or enforcement of
     this Note, whether or not suit is filed; and

          (b) costs of suit and such sums as the court may adjudge as attorneys'
     fees in any action to enforce payment of this Note or any part of it.

          Upon surrender of this Note for registration of transfer, duly
endorsed, or accompanied by a written instrument of transfer duly executed, by
the registered holder hereof or his attorney duly authorized in writing, and
upon satisfaction of the Company that such transfer is exempt from registration
under the Securities Act of 1933, a new note for a like principal amount will be
issued to, and registered in the name of, the transferee. The Company may treat
the person in whose name this Note is registered as the owner hereof for the
purpose of receiving payment and for all other purposes, and the Company shall
not be affected by any notice to the contrary.

          No alteration, amendment or waiver of any provision of this Note, made
by agreement of the holder hereof and any other person or party, shall

<PAGE>   6

constitute a waiver of any term hereof, or otherwise release or discharge the
liability of the Company under this Note.

          This Note may not be modified, terminated or discharged nor shall any
waiver hereunder be effective unless in writing signed by the party against whom
the same is asserted.

          The provisions of this Note shall be construed and interpreted, and in
all rights and obligations hereunder determined, in accordance with the laws of
the State of New York.

                                                     HMTF BRIDGE RHY, LLC

                                              By:  /s/ DAVID W. KNICKEL
                                                  -----------------------------
                                              Name:     David W. Knickel
                                                    ---------------------------
                                              Title:    Vice President
                                                     --------------------------

<PAGE>   7

THIS DEMAND NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
MAY NOT BE SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT IN ACCORDANCE WITH
CONDITIONS SPECIFIED HEREIN.

                            HMTF BRIDGE VIATEL, LLC

                                  Demand Note

                                                                   Dallas, Texas

          FOR VALUE RECEIVED, the undersigned (the "Company") , a limited
liability company organized and existing under the laws of the State of
Delaware, hereby promises to pay to the order of HM Viatel PG Europe, LLC, or
registered assigns, the principal sum of five million,six hundred thousand, two
hundred and four Dollars ($5,600,204.00) not later than three business days
after written demand for payment is delivered by the holder hereof to the
Company at its principal office (which is located at 200 Crescent Court, Suite
1600, Dallas, Texas, on the date of this Note) , with simple interest at a rate
of 7.5% per annum. Interest will be paid at the time of payment of the related
principal or at the time this Note is otherwise surrendered by the holder hereof
for cancellation.

          Payments of principal and interest accrued on the principal being paid
to the date of payment are to be made at the home office of the Company, or such
other place as the holder of this Note shall have specified in writing to the
Company, in lawful money of the United States of America.

          This Note and the other Demand Notes being issued and dated the date
hereof are herein called the "Notes." The Company represents and warrants that:

          (i) it is a limited liability company duly organized, validly existing
     and in good standing under the laws of the State of Delaware and has all
     power and authority to own and lease its property and to conduct its
     business as presently conducted or contemplated; the Company is duly
     qualified to transact business as a foreign corporation in each
     jurisdiction in which the conduct of its business as presently conducted or
     its ownership or leasing of property makes such qualification necessary;

          (ii) the execution and delivery by the Company of the Notes have been
     duly authorized by all the necessary corporate action and the Notes
     constitute the valid and binding agreements of the Company enforceable in
     accordance with their terms except to the extent that enforcement may be
     limited by applicable bankruptcy, insolvency, moratorium or other similar
     laws of general application relating to or affecting the enforcement of
     creditors' rights generally from time to time in effect; and

          (iii) the execution and delivery of the Notes does not and will not
     contravene, or constitute a default under, any law or regulation, the
     limited liability company agreement of the Company or any agreement,
     judgement, injunction, order, decree or instrument binding upon the
     Company, or result in the creation or imposition of any lien, claim or
     encumbrance on any asset of the Company.

          If any of the following events shall occur:

<PAGE>   8

          (i) any representation or warranty made by the Company in this Note
     shall be false in any material respect on the date as of which made or the
     Company shall violate any covenant or agreement made by it in this Note;

          (ii) the Company shall make an assignment for the benefit of creditors
     or admit in writing its inability to pay off its debts as they become due;

          (iii) an order, judgement or decree shall be entered adjudicating the
     Company bankrupt or insolvent;

          (iv) the Company shall petition or apply to any tribunal for the
     appointment of a trustee, receiver or liquidator of the Company or of any
     substantial part of its assets, or commence any proceedings relating to the
     Company under and bankruptcy, reorganization arrangement, insolvency,
     readjustment of debt, dissolution or liquidation law of any jurisdiction,
     whether now or hereafter in effect;

          (v) any such petition or application shall be filed, or any such
     proceeding shall be commenced, against the Company and the Company by any
     act shall indicate its approval thereof, consent thereto or acquiescence
     therein, or any order, judgement or decree shall be entered appointing any
     such trustee, receiver or liquidator, or approving the petition in any such
     proceedings, and any such order, judgement or decree shall remain unstayed
     and in effect for more than 60 days; or

          (vi) any order, judgement or decree shall be entered in any proceeding
     against the Company decreeing the dissolution of the Company;

then, notwithstanding any provision herein to the contrary, this Note shall
thereupon be and become forthwith due and payable without demand or other notice
of any kind by the holder hereof or any other person.

          The Company promises to pay the following costs, expenses and
attorneys' fees paid or incurred by the holder of this Note, or adjudged by the
court:

          (a) reasonable costs of collection, costs and expenses and attorneys'
     fees paid or incurred in connection with the collection or enforcement of
     this Note, whether or not suit is filed; and

          (b) costs of suit and such sums as the court may adjudge as attorneys'
     fees in any action to enforce payment of this Note or any part of it.

          Upon surrender of this Note for registration of transfer, duly
endorsed, or accompanied by a written instrument of transfer duly executed, by
the registered holder hereof or his attorney duly authorized in writing, and
upon satisfaction of the Company that such transfer is exempt from registration
under the Securities Act of 1933, a new note for a like principal amount will be
issued to, and registered in the name of, the transferee. The Company may treat
the person in whose name this Note is registered as the owner hereof for the
purpose of receiving payment and for all other purposes, and the Company shall
not be affected by any notice to the contrary.

          No alteration, amendment or waiver of any provision of this Note, made
by agreement of the holder hereof and any other person or party, shall

<PAGE>   9

constitute a waiver of any term hereof, or otherwise release or discharge the
liability of the Company under this Note.

          This Note may not be modified, terminated or discharged nor shall any
waiver hereunder be effective unless in writing signed by the party against whom
the same is asserted.

          The provisions of this Note shall be construed and interpreted, and in
all rights and obligations hereunder determined, in accordance with the laws of
the State of New York.

                                                     HMTF BRIDGE RHY, LLC

                                              By:  /s/ DAVID W. KNICKEL
                                                  -----------------------------
                                              Name:     David W. Knickel
                                                    ---------------------------
                                              Title:    Vice President
                                                     --------------------------

<PAGE>   10
THIS DEMAND NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
MAY NOT BE SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT IN ACCORDANCE WITH
CONDITIONS SPECIFIED HEREIN.

                            HMTF BRIDGE VIATEL, LLC

                                  Demand Note

                                                                  Dallas, Texas

         FOR VALUE RECEIVED, the undersigned (the "Company") , a limited
liability company organized and existing under the laws of the State of
Delaware, hereby promises to pay to the order of HMEU Viatel I-SBS Coinvestors,
LLC, or registered assigns, the principal sum of nine hundred and seventy three
thousand, four hundred and twenty five Dollars ($973,425.00) not later than
three business days after written demand for payment is delivered by the holder
hereof to the Company at its principal office (which is located at 200 Crescent
Court, Suite 1600, Dallas, Texas, on the date of this Note) , with simple
interest at a rate of 7.5% per annum. Interest will be paid at the time of
payment of the related principal or at the time this Note is otherwise
surrendered by the holder hereof for cancellation.

         Payments of principal and interest accrued on the principal being paid
to the date of payment are to be made at the home office of the Company, or such
other place as the holder of this Note shall have specified in writing to the
Company, in lawful money of the United States of America.

         This Note and the other Demand Notes being issued and dated the date
hereof are herein called the "Notes."

         The Company represents and warrants that:

          (i) it is a limited liability company duly organized, validly existing
     and in good standing under the laws of the State of Delaware and has all
     power and authority to own and lease its property and to conduct its
     business as presently conducted or contemplated; the Company is duly
     qualified to transact business as a foreign corporation in each
     jurisdiction in which the conduct of its business as presently conducted or
     its ownership or leasing of property makes such qualification necessary;

          (ii) the execution and delivery by the Company of the Notes have been
     duly authorized by all the necessary corporate action and the Notes
     constitute the valid and binding agreements of the Company enforceable in
     accordance with their terms except to the extent that enforcement may be
     limited by applicable bankruptcy, insolvency, moratorium or other similar
     laws of general application relating to or affecting the enforcement of
     creditors' rights generally from time to time in effect; and

          (iii) the execution and delivery of the Notes does not and will not
     contravene, or constitute a default under, any law or regulation, the
     limited liability company agreement of the Company or any agreement,
     judgement, injunction, order, decree or instrument binding upon the
     Company, or result in the creation or imposition of any lien, claim or
     encumbrance on any asset of the Company.

<PAGE>   11

         If any of the following events shall occur:

          (i) any representation or warranty made by the Company in this Note
     shall be false in any material respect on the date as of which made or the
     Company shall violate any covenant or agreement made by it in this Note;

          (ii) the Company shall make an assignment for the benefit of creditors
     or admit in writing its inability to pay off its debts as they become due;

          (iii) an order, judgement or decree shall be entered adjudicating the
     Company bankrupt or insolvent;

          (iv) the Company shall petition or apply to any tribunal for the
     appointment of a trustee, receiver or liquidator of the Company or of any
     substantial part of its assets, or commence any proceedings relating to the
     Company under and bankruptcy, reorganization arrangement, insolvency,
     readjustment of debt, dissolution or liquidation law of any jurisdiction,
     whether now or hereafter in effect;

          (v) any such petition or application shall be filed, or any such
     proceeding shall be commenced, against the Company and the Company by any
     act shall indicate its approval thereof, consent thereto or acquiescence
     therein, or any order, judgement or decree shall be entered appointing any
     such trustee, receiver or liquidator, or approving the petition in any such
     proceedings, and any such order, judgement or decree shall remain unstayed
     and in effect for more than 60 days; or

          (vi) any order, judgement or decree shall be entered in any proceeding
     against the Company decreeing the dissolution of the Company;

then, notwithstanding any provision herein to the contrary, this Note shall
thereupon be and become forthwith due and payable without demand or other notice
of any kind by the holder hereof or any other person.

The Company promises to pay the following costs, expenses and attorneys' fees
paid or incurred by the holder of this Note, or adjudged by the court:

          (a) reasonable costs of collection, costs and expenses and attorneys'
     fees paid or incurred in connection with the collection or enforcement of
     this Note, whether or not suit is filed; and

          (b) costs of suit and such sums as the court may adjudge as attorneys'
     fees in any action to enforce payment of this Note or any part of it.

         Upon surrender of this Note for registration of transfer, duly
endorsed, or accompanied by a written instrument of transfer duly executed, by
the registered holder hereof or his attorney duly authorized in writing, and
upon satisfaction of the Company that such transfer is exempt from registration
under the Securities Act of 1933, a new note for a like principal amount will be
issued to, and registered in the name of, the transferee. The Company may treat
the person in whose name this Note is registered as the owner hereof for the
purpose of receiving payment and for all other purposes, and the Company shall
not be affected by any notice to the contrary.

<PAGE>   12

         No alteration, amendment or waiver of any provision of this Note, made
by agreement of the holder hereof and any other person or party, shall
constitute a waiver of any term hereof, or otherwise release or discharge the
liability of the Company under this Note.

         This Note may not be modified, terminated or discharged nor shall any
waiver hereunder be effective unless in writing signed by the party against whom
the same is asserted.

         The provisions of this Note shall be construed and interpreted, and in
all rights and obligations hereunder determined, in accordance with the laws of
the State of New York.

                                              HMTF BRIDGE RHY, LLC

                                              By:  /s/ DAVID W. KNICKEL
                                                  -----------------------------
                                              Name:     David W. Knickel
                                                    ---------------------------
                                              Title:    Vice President
                                                     --------------------------

<PAGE>   13
THIS DEMAND NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND
MAY NOT BE SOLD, TRANSFERRED, PLEDGED OR HYPOTHECATED EXCEPT IN ACCORDANCE WITH
CONDITIONS SPECIFIED HEREIN.

                            HMTF BRIDGE VIATEL, LLC

                                  Demand Note

                                                                  Dallas, Texas

         FOR VALUE RECEIVED, the undersigned (the "Company") , a limited
liability company organized and existing under the laws of the State of
Delaware, hereby promises to pay to the order of HMEU Viatel I-EQ Coinvestors,
LLC, or registered assigns, the principal sum of nine hundred and seventy three
thousand, four hundred and twenty five Dollars ($973,425.00) not later than
three business days after written demand for payment is delivered by the holder
hereof to the Company at its principal office (which is located at 200 Crescent
Court, Suite 1600, Dallas, Texas, on the date of this Note) , with simple
interest at a rate of 7.5% per annum. Interest will be paid at the time of
payment of the related principal or at the time this Note is otherwise
surrendered by the holder hereof for cancellation.

         Payments of principal and interest accrued on the principal being paid
to the date of payment are to be made at the home office of the Company, or such
other place as the holder of this Note shall have specified in writing to the
Company, in lawful money of the United States of America.

         This Note and the other Demand Notes being issued and dated the date
hereof are herein called the "Notes." The Company represents and warrants that:

          (i) it is a limited liability company duly organized, validly existing
     and in good standing under the laws of the State of Delaware and has all
     power and authority to own and lease its property and to conduct its
     business as presently conducted or contemplated; the Company is duly
     qualified to transact business as a foreign corporation in each
     jurisdiction in which the conduct of its business as presently conducted or
     its ownership or leasing of property makes such qualification necessary;

          (ii) the execution and delivery by the Company of the Notes have been
     duly authorized by all the necessary corporate action and the Notes
     constitute the valid and binding agreements of the Company enforceable in
     accordance with their terms except to the extent that enforcement may be
     limited by applicable bankruptcy, insolvency, moratorium or other similar
     laws of general application relating to or affecting the enforcement of
     creditors' rights generally from time to time in effect; and

          (iii) the execution and delivery of the Notes does not and will not
     contravene, or constitute a default under, any law or regulation, the
     limited liability company agreement of the Company or any agreement,
     judgement, injunction, order, decree or instrument binding upon the
     Company, or result in the creation or imposition of any lien, claim or
     encumbrance on any asset of the Company.

<PAGE>   14

         If any of the following events shall occur:

          (i) any representation or warranty made by the Company in this Note
     shall be false in any material respect on the date as of which made or the
     Company shall violate any covenant or agreement made by it in this Note;

          (ii) the Company shall make an assignment for the benefit of creditors
     or admit in writing its inability to pay off its debts as they become due;

          (iii) an order, judgement or decree shall be entered adjudicating the
     Company bankrupt or insolvent;

          (iv) the Company shall petition or apply to any tribunal for the
     appointment of a trustee, receiver or liquidator of the Company or of any
     substantial part of its assets, or commence any proceedings relating to the
     Company under and bankruptcy, reorganization arrangement, insolvency,
     readjustment of debt, dissolution or liquidation law of any jurisdiction,
     whether now or hereafter in effect;

          (v) any such petition or application shall be filed, or any such
     proceeding shall be commenced, against the Company and the Company by any
     act shall indicate its approval thereof, consent thereto or acquiescence
     therein, or any order, judgement or decree shall be entered appointing any
     such trustee, receiver or liquidator, or approving the petition in any such
     proceedings, and any such order, judgement or decree shall remain unstayed
     and in effect for more than 60 days; or

          (vi) any order, judgement or decree shall be entered in any proceeding
     against the Company decreeing the dissolution of the Company;

then, notwithstanding any provision herein to the contrary, this Note shall
thereupon be and become forthwith due and payable without demand or other notice
of any kind by the holder hereof or any other person.

         The Company promises to pay the following costs, expenses and
attorneys' fees paid or incurred by the holder of this Note, or adjudged by the
court:

          (a) reasonable costs of collection, costs and expenses and attorneys'
     fees paid or incurred in connection with the collection or enforcement of
     this Note, whether or not suit is filed; and

          (b) costs of suit and such sums as the court may adjudge as attorneys'
     fees in any action to enforce payment of this Note or any part of it.

         Upon surrender of this Note for registration of transfer, duly
endorsed, or accompanied by a written instrument of transfer duly executed, by
the registered holder hereof or his attorney duly authorized in writing, and
upon satisfaction of the Company that such transfer is exempt from registration
under the Securities Act of 1933, a new note for a like principal amount will be
issued to, and registered in the name of, the transferee. The Company may treat
the person in whose name this Note is registered as the owner hereof for the
purpose of receiving payment and for all other purposes, and the Company shall
not be affected by any notice to the contrary.

<PAGE>   15

         No alteration, amendment or waiver of any provision of this Note, made
by agreement of the holder hereof and any other person or party, shall
constitute a waiver of any term hereof, or otherwise release or discharge the
liability of the Company under this Note.

         This Note may not be modified, terminated or discharged nor shall any
waiver hereunder be effective unless in writing signed by the party against whom
the same is asserted.

         The provisions of this Note shall be construed and interpreted, and in
all rights and obligations hereunder determined, in accordance with the laws of
the State of New York.

                                              HMTF BRIDGE RHY, LLC

                                              By:  /s/ DAVID W. KNICKEL
                                                  -----------------------------
                                              Name:     David W. Knickel
                                                    ---------------------------
                                              Title:    Vice President
                                                     --------------------------

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00012-of-00352.parquet"}]]