Document:

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                                                                    Exhibit 10.6

                                                                  EXECUTION COPY

                       CONVERTIBLE NOTE PURCHASE AGREEMENT

                                     between

                          TOTAL NETWORK SOLUTIONS, INC.

                                       and

                               CISCO SYSTEMS, INC.

                          Dated as of December 21, 1999

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         CONVERTIBLE NOTE PURCHASE AGREEMENT dated as of December 21, 1999
between TOTAL NETWORK SOLUTIONS INC., a New York corporation (the "COMPANY"),
and CISCO SYSTEMS, INC. (the "PURCHASER").

         WHEREAS, the Company wishes to issue and sell to the Purchaser (i) a
convertible promissory note of the Company in the original principal amount of
$3,172,872.24 in the form annexed as Exhibit A-1 hereto and dated the Closing
Date (as defined below) (the "SERIES B NOTE"), (ii) a convertible promissory
note of the Company in the original principal amount of $9,000,004.68 in the
form annexed as Exhibit A-2 hereto and dated the Closing Date (the "SERIES C
NOTE") and (iii) a convertible promissory note of the Company in the original
principal amount of $4,416,150.00 in the form annexed as Exhibit B hereto and
dated the Closing Date (the COMMON STOCK Note" and, together with the Series B
Note and the Series C Note, the "CONVERTIBLE NOTES"); and

         WHEREAS, the Purchaser wishes to purchase the Convertible Notes on the
terms and subject to the conditions set forth in this Agreement;

         NOW, THEREFORE, in consideration of the premises and the mutual
covenants contained in this Agreement, the parties agree as follows:

                                    ARTICLE 1

                              THE CONVERTIBLE NOTES

         SECTION 1.1. ISSUANCE, SALE AND DELIVERY OF THE CONVERTIBLE NOTES.
Subject to the terms and conditions of this Agreement and upon the basis of the
Purchaser's representations and warranties herein contained, the Company agrees
to issue and sell to the Purchaser and, upon the basis of the Company's
representations and warranties herein contained, the Purchaser agrees to
purchase from the Company at the closing (the "CLOSING"), the Convertible Notes.

         SECTION 1.2. CLOSING. The Closing shall take place at the offices of
Roberts, Sheridan & Kotel, P.C., 12 East 49th Street, New York, NY 10017. The
Closing shall take place at 10:00 a.m., New York time, on December 21, 1999 or
the earliest practicable date thereafter on which the conditions set forth in
Sections 4.1 and 4.2 have been satisfied (but not later than February 28, 2000
unless the Purchaser and the Company otherwise agree). The date and time of the
Closing are referred to herein as a "CLOSING DATE". At the Closing, the Company
shall issue and deliver to the Purchaser the Convertible Notes registered in the
name of the Purchaser. As payment in full for the Series B Note and against
delivery of the Series B Note as aforesaid, on the Closing Date the Purchaser
shall surrender to the Company for cancellation the 1,077,026 shares of the
Company's Series B Convertible Preferred Stock held by the Purchaser. As payment
in full for the Series C Note and against delivery of the Series C Note as
aforesaid, on the Closing Date the Purchaser shall (i) deliver to the Company a
cashier's or certified check, payable to the order of the Company, in the amount
of $9,000,004.68, (ii) transfer such sum to the account of the Company by wire
transfer of immediately available funds or (iii) deliver or

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transfer such sum to the Company by any combination of such methods of payment.
As payment in full for the Common Stock Note and against delivery of the Common
Stock Note as aforesaid, on the Closing Date the Purchaser shall surrender to
the Company for cancellation the 4,500,000 shares of the Company's Common Stock
held by the Purchaser.

                                    ARTICLE 2

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         The Company represents and warrants to the Purchaser as of the date
hereof that, except as set forth in the Disclosure Schedule attached as Schedule
I (which Disclosure Schedule makes explicit reference to the particular
representation or warranty as to which exception is taken, which in each case
shall constitute the sole representation and warranty as to which such exception
shall apply) and except for (i) this Agreement, (ii) the Series C Convertible
Stock Purchase Agreement dated as of the date hereof among the Company and the
purchasers signatory thereto, and (iii) the agreements and instruments to be
executed pursuant to the agreements and instruments identified in clauses (i)
and (ii) above and the transactions contemplated by the agreements and
instruments identified in such clauses and in this clause (iii):

         SECTION 2.1.  ORGANIZATION, QUALIFICATIONS AND CORPORATE POWER.

          (a) The Company is a corporation duly incorporated, validly existing
and in good standing under the laws of the State of New York and is duly
licensed or qualified to transact business as a foreign corporation and is in
good standing in each jurisdiction in which the nature of the business
transacted by it or the character of the properties owned or leased by it
requires such licensing or qualification, except where failure to be so licensed
or to so qualify would not reasonably be expected to have, individually or in
the aggregate, a material adverse effect on the condition (financial or
otherwise), business, assets or results of operations of the Company and its
subsidiaries, taken as a whole (a "MATERIAL ADVERSE EFFECT"). The Company has
the corporate power and authority to own and hold its properties and to carry on
its business as now conducted and as proposed to be conducted, to execute,
deliver and perform this Agreement, the Second Amended and Restated Registration
Rights Agreement in the form attached as Exhibit C (the "REGISTRATION RIGHTS
AGREEMENT") and the Second Amended and Restated Shareholders Agreement in the
form attached as Exhibit D (the "SHAREHOLDERS AGREEMENT" and together with this
Agreement, the Convertible Notes and the Registration Rights Agreement, the
"TRANSACTION DOCUMENTS"), to issue, sell and deliver the Convertible Notes at
the Closing and to issue the shares of Preferred Stock, par value $0.001 per
share ("PREFERRED STOCK"), and Common Stock, par value $0.001 per share, of the
Company ("COMMON STOCK") issuable upon conversion of the Convertible Notes (such
shares of Common Stock being referred to herein as the "COMMON NOTE SHARES",
such shares of Preferred Stock being referred to herein as the "PREFERRED NOTE
SHARES" and the Common Note Shares and the Preferred Note Shares being referred
to collectively as the "NOTE SHARES").

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          (b) The attached Schedule II contains a list of all subsidiaries of
the Company as of the date hereof and as of the date of Closing. Except for such
subsidiaries, the Company does not, as of the date hereof and as of the date of
Closing, (i) own of record or beneficially, directly or indirectly, (A) any
shares of capital stock or securities convertible into capital stock of any
other corporation or (B) any participating interest in any partnership, joint
venture or other non-corporate business enterprise or (ii) control, directly or
indirectly, any other entity. Each of the Company's subsidiaries is a
corporation duly incorporated, validly existing and in good standing under the
laws of its respective jurisdiction of incorporation and is duly licensed or
qualified to transact business as a foreign corporation and is in good standing
in each jurisdiction in which the nature of the business transacted by it or the
character of the properties owned or leased by it requires such licensing or
qualification, except where the failure to be so licensed or to so qualify would
not reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect. Each of the Company's subsidiaries has the corporate power and
authority to own and hold its properties and to carry on its business as now
conducted and as proposed to be conducted. All of the outstanding shares of
capital stock of each of the Company's subsidiaries are owned beneficially and
of record by the Company, one of its other subsidiaries, or any combination of
the Company and/or one or more of its other subsidiaries, in each case free and
clear of any liens, charges, restrictions, claims or encumbrances of any nature
whatsoever (collectively, "LIENS"). There are no outstanding subscriptions,
warrants, options, convertible securities, or other rights (contingent or other)
pursuant to which any of the subsidiaries is or may become obligated to issue
any shares of its capital stock to any person other than the Company or one of
the other subsidiaries. As used in Sections 2.6 through 2.9, 2.11 through 2.17,
2.21 and 2.23 through 2.30 inclusive, the term "COMPANY" shall mean the Company
and each of its subsidiaries.

         SECTION 2.2.  AUTHORIZATION OF AGREEMENTS, ETC.

          (a) The execution and delivery by the Company of the Transaction
Documents, the performance by the Company of its obligations thereunder and the
issuance, sale and delivery of the Convertible Notes have been duly authorized
by all requisite corporate action and will not (i) violate any provision of law,
any order of any court or other agency of government, the Restated Certificate
of Incorporation of the Company, as amended and restated by the charter
amendment (the "CHARTER AMENDMENT") attached hereto as Exhibit E (as so amended,
the "CHARTER"), or the Amended and Restated By-laws of the Company, as amended
(the "BY-LAWS") attached hereto as Exhibit H, (ii) violate any provision of any
indenture, agreement or other instrument to which the Company, any of its
subsidiaries or any of their respective properties or assets is bound, or
conflict with, result in a breach of or constitute (with due notice or lapse of
time or both) a default under any such indenture, agreement or other instrument,
other than any such violation, conflict or default that would not reasonably be
expected to cause a Material Adverse Effect or (iii) result in the creation or
imposition of any Lien upon any of the properties or assets of the Company or
any of its subsidiaries.

                (b) The Convertible Notes have been duly authorized, executed
and delivered by the Company and, when issued and delivered in accordance with
the terms of this Agreement,

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will constitute the valid and binding obligations of the Company, enforceable in
accordance with their respective terms (subject to applicable bankruptcy,
reorganization, insolvency, moratorium and similar laws affecting the rights of
creditors generally and to general principles of equity, regardless of whether
enforcement is sought in equity or at law).

                (c) The Preferred Note Shares have been duly authorized and,
when issued upon conversion of the Convertible Notes, will be validly issued,
fully paid and nonassessable shares of Series B Convertible Preferred Stock of
the Company ("SERIES B PREFERRED STOCK"), in the case of the Series B Note, or
Series C Convertible Preferred Stock of the Company ("SERIES C PREFERRED
STOCK"), in the case of the Series C Note, with no personal liability attaching
to the ownership thereof (other than such liability, if any, as may be (i)
imposed by Section 630 of the New York Business Corporation Law or (ii)
attributable to acts of the Purchaser) and will be free and clear of all Liens.
The issuance and delivery of the Preferred Note Shares is not subject to any
preemptive right of shareholders of the Company that has not been waived or to
any right of first refusal or other right in favor of any person that has not
been waived.

                  (d) The Common Note Shares have been duly authorized and, when
issued upon conversion of the Convertible Notes or the Preferred Note Shares, as
the case may be, will be validly issued, fully paid and nonassessable shares of
Common Stock with no personal liability attaching to the ownership thereof
(other than such liability, if any, as may be (i) imposed by Section 630 of the
New York Business Corporation Law or (ii) attributable to acts of the Purchaser)
and will be free and clear of all Liens. The issuance and delivery of the Common
Note Shares is not subject to any preemptive right of shareholders of the
Company that has not been waived or to any right of first refusal or other right
in favor of any person that has not been waived.

         SECTION 2.3. VALIDITY. This Agreement has been duly executed and
delivered by the Company and this Agreement and each of the other Transaction
Documents, when executed and delivered in accordance with this Agreement, will
constitute the valid and binding obligations of the Company, enforceable in
accordance with their respective terms, except as the enforcement of any of such
Transaction Documents may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium or other similar laws relating to or affecting
creditors' rights generally and by equitable principles.

         SECTION 2.4. AUTHORIZED CAPITAL STOCK. As of the date hereof, the
authorized capital stock of the Company consists of 150,000,000 shares of Common
Stock and 5,000,000 shares of preferred stock, par value $0.001 per share
("PREFERRED STOCK"), of which 170,000 shares have been designated Series A
Senior Redeemable Preferred Stock, 1,620,700 shares have been designated Series
B Convertible Preferred Stock and 1,650,000 have been designated Series C
Convertible Preferred Stock. As of the date hereof and immediately prior to the
Closing, 76,371,375 shares of Common Stock (exclusive of shares of Common Stock
(the "ADDITIONAL OPTION SHARES") issued upon exercise of options that are
outstanding as of the date hereof or are issued after the date hereof pursuant
to the Company's Amended and Restated 1998 Stock Option Plan (the "1998 PLAN")),
99,804.2276 shares Series A Preferred Stock, and 1,077,026

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shares of Series B Preferred Stock will be validly issued and outstanding, fully
paid and nonassessable with no personal liability attaching to the ownership
thereof (other than such liability, if any, as may be (i) imposed by Section 630
of the New York Business Corporation Law or (ii) attributable to acts of the
Purchaser) and no shares of Series C Preferred Stock will have been issued. The
Company has reserved 21,303,000 shares of Common Stock for issuance pursuant to
the 1998 Plan of which 15,014,883 shares (plus such shares as are subject to
options issued under the 1998 Plan between the date of this Agreement and the
Closing Date) will be subject to outstanding unexercised options immediately
prior to the Closing. The shareholders of record and holders of subscriptions,
warrants, options, convertible securities, and other rights (contingent or
other) to purchase or otherwise acquire equity securities of the Company, and
the number of shares of Common Stock, Series A Preferred Stock and Series B
Preferred Stock and the number of such subscriptions, warrants, options,
convertible securities, and other such rights held by each as of the date
hereof, are as set forth in the attached Schedule III. The designations, powers,
preferences, rights, qualifications, limitations and restrictions in respect of
each class and series of authorized capital stock of the Company are as set
forth in the Charter, and all such designations, powers, preferences, rights,
qualifications, limitations and restrictions are valid, binding and enforceable
and in accordance with all applicable laws. Except as set forth in the attached
Schedule III, as of the date hereof and immediately prior to the Closing, (i) no
person (other than a person receiving capital stock of the Company in accordance
with the procedures set forth in the Amended and Restated Shareholders Agreement
of the Company dated as of May 13, 1999 (the "EXISTING SHAREHOLDERS AGREEMENT"))
owns or will own of record any share of Common Stock (except for Additional
Option Shares) or Preferred Stock, (ii) no subscription, warrant, option,
convertible security, or other right (contingent or other) to purchase or
otherwise acquire equity securities of the Company (other than stock options
issued after the date hereof pursuant to the 1998 Plan) is or will be authorized
or outstanding and (iii) except for options that the Company has committed to
issue to employees pursuant to the 1998 Plan that have not yet been issued,
there is or will be no commitment by the Company to issue shares, subscriptions,
warrants, options, convertible securities, or other such rights or to distribute
to holders of any of its securities any evidence of indebtedness or asset.
Except as set forth in this Agreement, in the attached Schedule III or in the
Charter, the Company will have no obligation (contingent or other) to purchase,
redeem or otherwise acquire any of its equity securities or any interest therein
or to pay any dividend or make any other distribution in respect thereof. Except
for this Agreement, the Existing Shareholders Agreement and the stock option
agreements between the Company and each option holder of the Company, to the
best of the Company's knowledge there are no voting trusts or agreements,
shareholders' agreements, pledge agreements, buy-sell agreements, rights of
first refusal, preemptive rights or proxies relating to any securities of the
Company or any of its subsidiaries (whether or not the Company or any of its
subsidiaries is a party thereto). All of the outstanding securities of the
Company were issued in compliance with all applicable Federal and state
securities laws.

         SECTION 2.5. FINANCIAL STATEMENTS. The Company has furnished to the
Purchaser (i) the audited consolidated balance sheets of the Company and its
subsidiaries as of December 31, 1996, 1997 and 1998 and the related audited
consolidated statements of income, shareholders' equity and cash flows of the
Company and its subsidiaries for the years ended December 31,

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1996, 1997 and 1998 and (ii) the unaudited consolidated balance sheets of the
Company and its subsidiaries as of September 30, 1999 and the related unaudited
consolidated statements of income, shareholders' equity and cash flows of the
Company and its subsidiaries for the nine-month period ended September 30, 1999.
The unaudited consolidated balance sheet of the Company and its subsidiaries as
of September 30, 1999 is referred to herein as the "BALANCE SHEET" and, together
with the related unaudited consolidated statements of income, shareholders'
equity and cash flows of the Company and its subsidiaries for the nine months
then ended, as the "SEPTEMBER 30 STATEMENTS". (Complete copies of the September
30 Statements are attached hereto as Exhibit G.) All such financial statements
have been prepared in accordance with generally accepted accounting principles
consistently applied and fairly present the consolidated financial position of
the Company and its subsidiaries as of their respective dates, and the
consolidated results of their operations and cash flows for the periods then
ended. Since the date of the Balance Sheet, (i) there has been no change in the
assets, liabilities or financial condition of the Company and its subsidiaries
(on a consolidated basis) from that reflected in the September 30 Statements
except for changes in the ordinary course of business which, individually or in
the aggregate, would not reasonably be expected to have a Material Adverse
Effect; and (ii) there has not otherwise occurred any Material Adverse Effect.

         SECTION 2.6. EVENTS SUBSEQUENT TO THE DATE OF THE BALANCE SHEET. Since
the date of the Balance Sheet, the Company has not (i) issued any stock, bond or
other corporate security (other than stock options issued pursuant to the 1998
Plan and shares of Common Stock issued upon exercise of such options), (ii)
borrowed any amount or incurred or become subject to any liability (absolute,
accrued or contingent), except current liabilities incurred and liabilities
under contracts entered into in the ordinary course of business, (iii)
discharged or satisfied any Lien or incurred or paid any obligation or liability
(absolute, accrued or contingent) other than current liabilities shown on the
Balance Sheet and current liabilities incurred since the date of the Balance
Sheet in the ordinary course of business, (iv) declared or made any payment or
distribution to shareholders or purchased or redeemed any share of its capital
stock or other security, (v) mortgaged, pledged, encumbered or subjected to Lien
any of its assets, tangible or intangible, other than Liens of current taxes not
yet due and payable and minor imperfections of title, if any, not material in
nature or amount and not materially detracting from the value or impairing the
use of the property subject thereto or impairing the operations of the Company
and its subsidiaries, (vi) sold, assigned or transferred any of its tangible
assets except in the ordinary course of business, or canceled any debt or claim,
(vii) sold, assigned, transferred or granted any exclusive license with respect
to any patent, trademark, trade name, service mark, copyright, trade secret or
other intangible asset, (viii) suffered any loss of, or waived, any right of
substantial value whether or not in the ordinary course of business, (ix) made
any change in officer compensation except in the ordinary course of business and
consistent with past practice, (x) made any material change in the manner of
business or operations of the Company, (xi) entered into any transaction except
in the ordinary course of business or as otherwise contemplated hereby or (xii)
entered into any commitment (contingent or otherwise) to do any of the
foregoing.

         SECTION 2.7. LITIGATION; COMPLIANCE WITH LAW. There is no (i) action,
suit, claim, proceeding or investigation pending or, to the Company's knowledge,
threatened against or

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affecting the Company, at law or in equity, before by any Federal, state,
municipal or other governmental department, commission, board, bureau, agency or
instrumentality, domestic or foreign, (ii) arbitration proceeding relating to
the Company pending under collective bargaining agreements or otherwise or (iii)
governmental inquiry pending or, to the Company's knowledge, threatened against
or affecting the Company (including without limitation any inquiry as to the
qualification of the Company to hold or receive any license or permit), and, to
the Company's knowledge, there is no basis for any of the foregoing. The Company
is not in default with respect to any order, writ, injunction or decree known to
or served upon the Company of any court or of any Federal, state, municipal or
other governmental department, commission, board, bureau, agency or
instrumentality, domestic or foreign. There is no action or suit by the Company
pending, threatened or contemplated against others. The Company has complied in
all material respects with all material laws, rules, regulations and orders
applicable to its business, operations, properties, assets, products and
services. The Company has all necessary permits, licenses and other
authorizations required to conduct its business as conducted and as proposed to
be conducted, and the Company has been operating its business pursuant to and in
material compliance with the terms of all such permits, licenses and other
authorizations. There is no existing law, rule, regulation or order, whether
Federal, state, county or local, which would prohibit or restrict the Company
from, or otherwise materially adversely affect the Company in, conducting its
business in any jurisdiction in which it is now conducting business or, to the
Company's knowledge, in which it proposes to conduct business.

         SECTION 2.8. PROPRIETARY INFORMATION OF THIRD PARTIES. No third party
has claimed or, to the Company's knowledge, has reason to claim that any person
employed by or affiliated with the Company has, in connection with such person's
employment or affiliation with the Company, (a) violated or may be violating any
of the terms or conditions of his employment, non-competition or non-disclosure
agreement with such third party, (b) disclosed or may be disclosing or utilized
or may be utilizing any trade secret or proprietary information or documentation
of such third party or (c) interfered or may be interfering in the employment
relationship between such third party and any of its present or former employees
in violation of any contractual obligation of such person to such third party.
No third party has requested information from the Company which suggests that
such a claim might be contemplated. To the Company's knowledge, no person
employed by or affiliated with the Company has employed or proposes to employ
any trade secret or any information or documentation proprietary to any former
employer, and to the Company's knowledge, no person employed by or affiliated
with the Company has violated any confidential relationship which such person
may have had with any third party, in connection with the development,
manufacture or sale of any product or proposed product or the development or
sale of any service or proposed service of the Company. To the Company's
knowledge, none of the execution or delivery of this Agreement, or the carrying
on of the business of the Company as officers, employees or agents by any
officer, director or key employee of the Company, or the conduct or proposed
conduct of the business of the Company, will conflict with or result in a breach
of the terms, conditions or provisions of or constitute a default under any
contract, covenant or instrument under which any such person is obligated.

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         SECTION 2.9. PATENTS, TRADEMARKS, ETC. (a) Set forth in Schedule I is a
list and brief description, as of the date hereof, of all domestic and foreign
patents, patent rights, patent applications, trademarks, trademark applications,
service marks, service mark applications, trade names and copyrights, and all
applications for such which are in the process of being prepared, owned by or
registered in the name of the Company, or of which the Company is a licensor or
licensee or in which the Company has any right, and in each case a brief
description of the nature of such right.

          (b) The Company owns or possesses adequate licenses or other rights to
use all patents, patent applications, trademarks, trademark applications,
service marks, service mark applications, trade names, copyrights, manufacturing
processes, formulae, trade secrets, customer lists and know how (collectively,
"INTELLECTUAL PROPERTY") necessary or desirable to the conduct of its business
as conducted and as proposed to be conducted, and no claim is pending or, to the
Company's knowledge, threatened to the effect that the operations of the Company
infringe upon or conflict with the asserted rights of any other person under any
Intellectual Property, and to the Company's knowledge there is no basis for any
such claim (whether or not pending or threatened). No claim is pending or, to
the Company's knowledge, threatened to the effect that any such Intellectual
Property owned or licensed by the Company, or which the Company otherwise has
the right to use, is invalid or unenforceable by the Company, and, to the
Company's knowledge, there is no basis for any such claim (whether or not
pending or threatened). The Company has not granted or assigned to any other
person or entity any right to provide the services of the Company.

         SECTION 2.10. TITLE TO PROPERTIES. The Company and its subsidiaries
have good, clear and marketable title to their respective properties and assets
reflected on the Balance Sheet or acquired by them since the date of the Balance
Sheet (other than properties and assets disposed of in the ordinary course of
business since the date of the Balance Sheet), and all such properties and
assets are free and clear of Liens (including without limitation, easements and
licenses), except for Liens for current taxes not yet due and payable and minor
imperfections of title, if any, not material in nature or amount and not
materially detracting from the value or impairing the use of the property
subject thereto or impairing the operations of the Company and its subsidiaries,
including without limitation, the ability of the Company and its subsidiaries to
secure financing using such properties and assets as collateral. To the
Company's knowledge, there are no condemnation, environmental, zoning or other
land use regulation proceedings, either instituted or planned to be instituted,
which would adversely affect the use or operation of the Company's and its
subsidiaries' properties and assets for their respective intended uses and
purposes, or the value of such properties, and neither the Company nor any
subsidiary has received notice of any special assessment proceedings which would
affect such properties and assets.

         SECTION 2.11. LEASEHOLD INTERESTS. Each lease or agreement to which the
Company is a party under which it is a lessee of any property, real or personal,
is a valid and subsisting agreement, duly authorized and entered into, without
any material default of the Company thereunder and, to the best of the Company's
knowledge, without any material default thereunder of any other party thereto.
No event has occurred which, with due notice or lapse of time or both,

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would constitute a material default or event of default by the Company under any
such lease or agreement or, to the Company's knowledge, by any other party
thereto. The Company's possession of such property has not been disturbed and,
to the Company's knowledge, no claim has been asserted against the Company
adverse to its rights in such leasehold interests.

         SECTION 2.12. INSURANCE. The Company holds valid policies covering
insurance reasonably deemed by the Company to comply with Section 5.3.

         SECTION 2.13. TAXES. The Company has filed all tax returns required to
be filed by it (which returns are accurate and complete in all material
respects), and the Company has paid all taxes shown to be due by such returns as
well as all other taxes, assessments and governmental charges which have become
due or payable, including, without limitation, all taxes which the Company is
obligated to withhold from amounts owing to employees, creditors and third
parties. The Company has established adequate reserves for all taxes accrued but
not yet payable. Except as set forth in Schedule I, all material tax elections
of any type which the Company has made as of the date hereof are set forth in
the financial statements referred to in Section 2.5. The Federal income tax
returns of the Company have never been audited by the Internal Revenue Service.
No deficiency or assessment with respect to, or proposed adjustment of, the
Company's Federal, state, county or local taxes is pending or, to the best of
the Company's knowledge, threatened. There is no tax lien (other than for
current taxes not yet due and payable), whether imposed by any Federal, state,
county or local taxing authority, outstanding against the assets, properties or
business of the Company.

         SECTION 2.14. OTHER AGREEMENTS. The Company is not a party to or
otherwise bound by any contractual obligation, written or oral, which,
individually or in the aggregate, would reasonably be expected to have a
Material Adverse Effect. Except as set forth in the attached Schedule IV, as of
the date hereof, the Company is not a party to or otherwise bound by any written
or oral:

          (a) consulting agreement or agreement with a client or customer;

          (b) agreement with any labor union (and, to the knowledge of the
Company, no organizational effort is being made with respect to any of its
employees);

          (c) agreement with any supplier containing any provision permitting
any party other than the Company to renegotiate the price or other terms upon
the occurrence of a failure by the Company to meet its obligations under the
agreement when due or the occurrence of any other event;

          (d) agreement for the future purchase of fixed assets or for the
future purchase of materials, supplies or equipment in excess of its normal
operating requirements;

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          (e) agreement for the employment of any officer, employee or other
person (whether of a legally binding nature or in the nature of informal
understandings) on a full-time or consulting basis;

          (f) bonus, pension, profit-sharing, retirement, hospitalization,
insurance, stock purchase, stock option or other plan, agreement or
understanding pursuant to which benefits are provided to any employee of the
Company (other than group insurance plans which are not self-insured and are
applicable to employees generally);

          (g) agreement relating to the borrowing of money or to the mortgaging
or pledging of, or otherwise placing a Lien on, any asset of the Company;

          (h) guaranty of any obligation for borrowed money or otherwise;

          (i) voting trust or agreement, shareholders' agreement, pledge
agreement, buy-sell agreement or first refusal or preemptive rights agreement
relating to any securities of the Company, other than this Agreement;

          (j) agreement, or group of related agreements with the same party or
any group of affiliated parties, under which the Company has advanced or agreed
to advance money or has agreed to lease any property as lessee or lessor (except
for lease agreements under which the Company is the lessee and which are not,
individually or in the aggregate, material to the business of the Company);

          (k) agreement or obligation (contingent or otherwise) to issue, sell
or otherwise distribute or to repurchase or otherwise acquire or retire any
share of its capital stock or any of its other equity securities, other than the
Charter;

          (l) assignment, license or other agreement with respect to any form of
intangible property, including Intellectual Property;

          (m) agreement under which it has granted any person any registration
rights;

          (n) agreement under which it has limited or restricted its right to
compete with any person in any respect;

          (o) other agreement or group of related agreements with the same party
involving more than $50,000 or continuing over a period of more than six months
from the date or dates thereof (including renewals or extensions optional with
another party), which agreement or group of agreements is not terminable by the
Company without penalty upon notice of 30 days or less; or

          (p) other agreement, instrument, commitment, plan or arrangement, a
copy of which would be required to be filed with the Securities and Exchange
Commission (the "COMMISSION")

                                       10

<PAGE>

as an exhibit to a registration statement on Form S-1 if the Company were
registering securities under the Securities Act of 1933, as amended (the
"SECURITIES ACT").

The Company, and to the Company's knowledge, each other party thereto have in
all material respects performed all the obligations required to be performed by
them to date (or each non-performing party has received a valid, enforceable and
irrevocable written waiver with respect to its non-performance), have received
no notice of default and are not in default (with due notice or lapse of time or
both) under any agreement, instrument, commitment, plan or arrangement to which
the Company is a party or by which it or its property is bound. The Company has
no present expectation or intention of not fully performing all its obligations
under each such agreement, instrument, commitment, plan or arrangement, and the
Company has no knowledge of any breach or anticipated breach by the other party
to any agreement, instrument, commitment, plan or arrangement to which the
Company is a party. The Company is in full compliance with all of the terms and
provisions of its Restated Certificate of Incorporation and Bylaws.

         SECTION 2.15. LOANS AND ADVANCES. As of the date hereof, the Company
does not have any outstanding loans or advances to any person and is not
obligated to make any such loans or advances, except, in each case, for advances
to employees of the Company in respect of reimbursable business expenses
anticipated to be incurred by them in connection with their performance of
services for the Company.

         SECTION 2.16. ASSUMPTIONS, GUARANTIES, ETC. OF INDEBTEDNESS OF OTHER
PERSONS. As of the date hereof, the Company has not assumed, guaranteed,
endorsed or otherwise become directly or contingently liable on any outstanding
indebtedness of any other person (including, without limitation, liability by
way of agreement, contingent or otherwise, to purchase, to provide funds for
payment, to supply funds to or otherwise invest in the debtor, or otherwise to
assure the creditor against loss), except for guaranties by endorsement of
negotiable instruments for deposit or collection in the ordinary course of
business.

         SECTION 2.17. SIGNIFICANT CLIENTS AND SUPPLIERS. As of the date hereof,
no client which accounted for five percent or more of the Company's revenues
during the period covered by the financial statements referred to in Section
2.5, or which has been significant to the Company thereafter, has terminated,
materially reduced or, to the Company's knowledge, threatened to terminate or
materially reduce its purchases from the Company, as the case may be. Schedule V
sets forth each client which accounted for five percent or more of the Company's
revenues during the periods covered by the financial statements referred to in
Section 2.5, or which has been significant to the Company thereafter and the
approximate total amount of revenues generated by such client during such
periods.

         SECTION 2.18. GOVERNMENTAL APPROVALS. Subject to the accuracy of the
representations and warranties of the Purchaser set forth in Article 3, no
registration or filing with, or consent or approval of or other action by, any
Federal, state or other governmental agency or instrumentality is or will be
necessary for the valid execution, delivery and performance by the Company of
the

                                       11

<PAGE>

Transaction Documents and the issuance, sale and delivery of the Convertible
Notes other than (i) any required filings pursuant to state securities laws (all
of which filings will have been made by the Company prior to or at the Closing,
other than those which are required to be made after the Closing and which will
be duly made on a timely basis) in connection with the sale of the Convertible
Notes and (ii) with respect to the Registration Rights Agreement, the
registration of the shares covered thereby with the Commission and filings
pursuant to state securities laws and (iii) filing with the Secretary of State
of the State of New York of the Charter Amendment, in the form attached as
Exhibit E, fixing and determining the terms of the Series C Preferred Stock.

         SECTION 2.19. DISCLOSURE. Neither this Agreement, nor any Schedule or
Exhibit to this Agreement contains an untrue statement of a material fact or
omits a material fact necessary to make the statements contained herein or
therein, in the light of the circumstances under which they were made, not
misleading. None of the statements, documents, certificates or other items
prepared or supplied by the Company with respect to the transactions
contemplated hereby contains an untrue statement of a material fact or omits a
material fact necessary to make the statements contained therein, in the light
of the circumstances under which they were made, not misleading. There is no
fact which the Company has not disclosed to the Purchaser or its counsel and
which is known to the Company (other than facts known to the general public or
generally known in the Company's industry) which materially and adversely
affects or is reasonably likely to materially and adversely affect the business,
financial condition, operations or property of the Company or any of its
subsidiaries. The Company has supplied the Purchaser with all written
information reasonably requested by it.

         SECTION 2.20. OFFERING OF THE CONVERTIBLE NOTES. Neither the Company
nor any person authorized or employed by the Company as agent, broker, dealer or
otherwise in connection with the offering or sale of the Convertible Notes or
any security of the Company similar to the Convertible Notes has offered the
Convertible Notes or any such similar security for sale to, or solicited any
offer to buy the Convertible Notes or any such similar security from, or
otherwise approached or negotiated with respect thereto with, any person or
persons, and neither the Company nor any person acting on its behalf has taken
or will take any other action, in either case so as to subject the offering,
issuance or sale of the Convertible Notes to the registration provisions of the
Securities Act.

         SECTION 2.21. BROKERS. The Company has no contract, arrangement or
understanding with any broker, finder or similar agent with respect to the
transactions contemplated by this Agreement.

         SECTION 2.22. OFFICERS. Set forth in Schedule I is a list of the names
of the titled officers of the Company as of the date hereof, together with the
title or job classification of each such person and the total compensation
anticipated to be paid to each such person by the Company and its subsidiaries
in 1999.

         SECTION 2.23. TRANSACTIONS WITH AFFILIATES. No director, officer,
employee or shareholder of the Company, or member of the family of any such
person, or any corporation, partnership, trust or other entity in which any such
person, or any member of the family of any

                                       12

<PAGE>

such person, has a substantial interest or is an officer, director, trustee,
partner or holder of more than five percent of the outstanding capital stock
thereof, is a party to any transaction with the Company, including any contract,
agreement or other arrangement providing for the employment of, furnishing of
services by, rental of real or personal property from or otherwise requiring
payments to any such person or firm, other than employment-at-will arrangements
in the ordinary course of business.

         SECTION 2.24. EMPLOYEES. No employee has advised the Company (orally or
in writing) that he or she intends to terminate employment with the Company. The
Company has complied in all material respects with all applicable laws relating
to the employment of labor, including provisions relating to wages, hours, equal
opportunity, collective bargaining and the payment of Social Security and other
taxes.

         SECTION 2.25. ENVIRONMENTAL PROTECTION. The Company has not caused or
allowed, or contracted with any party for, the generation, use, transportation,
treatment, storage or disposal of any Hazardous Substances (as defined below) in
connection with the operation of its business or otherwise. The Company, the
operation of its business, and any real property that the Company owns or, to
the knowledge of the Company, leases or otherwise occupies or uses (the
"PREMISES") are in compliance with all applicable Environmental Laws (as defined
below) and orders or directives of any governmental authorities having
jurisdiction under such Environmental Laws, including, without limitation, any
Environmental Laws or orders or directives with respect to any cleanup or
remediation of any release or threat of release of Hazardous Substances. The
Company has not received any citation, directive, letter or other communication,
written or oral, or any notice of any proceeding, claim or lawsuit, from any
person relating to a violation of applicable Environmental Laws and arising out
of the ownership or occupation of the Premises, or the conduct of its
operations, and the Company is not aware of any basis therefor. The Company has
obtained and is maintaining in full force and effect all necessary permits,
licenses and approvals required to be obtained by it by all Environmental Laws
applicable to the Premises and the business operations conducted thereon
(including operations conducted by tenants on the Premises), and is in material
compliance with all such permits, licenses and approvals. The Company has not
caused or allowed a release, or a threat of release, of any Hazardous Substance
unto, at or near the Premises, and, to the best of the Company's knowledge,
neither the Premises nor any property at or near the Premises has ever been
subject to a release, or a threat of release, of any Hazardous Substance. For
the purposes of this Agreement, the term "ENVIRONMENTAL LAWS" shall mean any
Federal, state or local law or ordinance or regulation pertaining to the
protection of human health or the environment, including, without limitation,
the Comprehensive Environmental Response, Compensation and Liability Act, 42
U.S.C. Sections 9601, ET SEQ., the Emergency Planning and Community
Right-to-Know Act, 42 U.S.C. Sections 11001, ET SEQ., and the Resource
Conservation and Recovery Act, 42 U.S.C. Sections 6901, ET SEQ. For purposes of
this Agreement, the term "HAZARDOUS SUBSTANCES" shall include oil and petroleum,
products, asbestos, polychlorinated biphenyls, urea formaldehyde and any other
materials classified as hazardous or toxic under any Environmental Laws.

                                       13

<PAGE>

         SECTION 2.26. ERISA. (a) Schedule I lists each Employee Plan that
covers any employee of the Company, copies or descriptions of all of which have
previously been made available or furnished to the Purchaser. With respect to
each Employee Plan, the Company has provided the most recently filed Form 5500
(if any such report was required) and an accurate summary description of such
plan.

          (b) Schedule I also includes a list of each Benefit Arrangement of the
Company, copies or descriptions of all of which have been made available or
furnished previously to the Purchaser.

          (c) No Employee Plan is a Multiemployer Plan and no Employee Plan is
subject to Title IV of ERISA. The Company and its affiliates have not incurred
any liability under Title IV of ERISA arising in connection with the termination
of any plan covered or previously covered by Title IV of ERISA.

          (d) None of the Employee Plans or other arrangements listed on
Schedule I covers any non-United States employee or former employee of the
Company.

          (e) No "prohibited transaction", as defined in Section 406 of ERISA or
Section 4975 of the Code, has occurred with respect to any Employee Plan.

          (f) Each Employee Plan which is intended to be qualified under Section
401(a) of the Code is so qualified and has been so qualified during the period
from its adoption to date, and each trust forming a part thereof is exempt from
tax pursuant to Section 501(a) of the Code. The Company has furnished to the
Purchaser copies of the most recent Internal Revenue Service determination
letters with respect to each such plan. Each Employee Plan has been maintained
in compliance with its terms and with the requirements prescribed by any and all
statutes, orders, rules and regulations, including but not limited to ERISA and
the Code, which are applicable to such plan, except for violations which would
not reasonably be expected to have, individually or in the aggregate, a Material
Adverse Effect.

          (g) Each Employee Plan and each Benefit Arrangement has been
maintained in substantial compliance with its terms and with the requirements
prescribed by any and all statutes, orders, rules and regulations which are
applicable to such Employee Plan and Benefit Arrangement, except for violations
which would not reasonably be expected to have, individually or in the
aggregate, a Material Adverse Effect.

          (h) Except as disclosed in writing to the Purchaser prior to the date
hereof, there has been no amendment to, written interpretation of or
announcement (whether or not written) by the Company or any of its ERISA
Affiliates relating to, or change in employee participation or coverage under,
any Employee Plan or Benefit Arrangement that would increase materially the
expense of maintaining such Employee Plan or Benefit Arrangement above the level
of the expense incurred in respect thereof for the fiscal year ended prior to
the date hereof.

                                       14

<PAGE>

          (i) There is no contract, agreement, plan or arrangement covering any
employee or former employee of the Company that, individually or collectively,
could give rise to the payment of any amount that would not be deductible
pursuant to the terms of Section 280G of the Code.

          (j) No tax under Section 4980B of the Code has been incurred in
respect of any Employee Plan that is a group health plan, as defined in Section
5000(b)(1) of the Code.

          (k) With respect to the employees and former employees of the Company,
there are no employee post-retirement medical or health plans in effect, except
as required by Section 4980B of the Code.

          (l) No employee of the Company will become entitled to any bonus,
retirement, severance or similar benefit or enhanced benefit solely as a result
of the transactions contemplated hereby.

          (m) The Company does not have, nor is it reasonably expected to have,
any liability under Title IV of ERISA.

         SECTION 2.27. QUESTIONABLE PAYMENTS. Neither the Company nor any
subsidiary, nor, to the Company's knowledge, any of the Company's or any
subsidiary's current or former shareholders, directors, officers, agents,
employees or other persons associated with or active on behalf of the Company or
any subsidiary, has on behalf of the Company or any subsidiary or in connection
with their business (a) used any corporate funds for unlawful contributions,
gifts, entertainment or other unlawful expenses relating to political activity;
(b) made any direct or indirect unlawful payments to foreign or domestic
government officials or employees from corporate funds; (c) violated any
provision of the Foreign Corrupt Practices Act of 1977, as amended, or any rules
and regulations thereunder; (d) established or maintained any unlawful or
unrecorded fund of corporate monies or other assets; (e) made any false or
fictitious entries on the books and records of the Company; or (f) made any
unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful
payment of any nature.

         SECTION 2.28. FEDERAL RESERVE REGULATIONS. The Company is not engaged
in the business of extending credit for the purpose of purchasing or carrying
margin securities (within the meaning of Regulation G of the Board of Governors
of the Federal Reserve System), and no part of the proceeds of the Convertible
Notes will be used to purchase or carry any margin security or to extend credit
to others for the purpose of purchasing or carrying any margin security or in
any other manner which would involve a violation of any of the regulations of
the Board of Governors of the Federal Reserve System.

         SECTION 2.29. NO UNDISCLOSED LIABILITIES. There are no liabilities of
the Company of any kind whatsoever, whether accrued, contingent, absolute,
determined, determinable or otherwise, and there is no existing condition,
situation or set of circumstances which could reasonably be expected to result
in such a liability, other than:

                                       15

<PAGE>

          (a)   liabilities provided for in the Balance Sheet;

          (b) undisclosed liabilities which, individually or in the aggregate,
are not material to the Company; and

          (c) liabilities incurred subsequent to the date of the Balance Sheet
in the ordinary course of business that would not reasonably be expected to
cause a Material Adverse Effect.

         SECTION 2.30. NO CRIMINAL PROCEEDINGS. There are no pending actions,
charges, indictments, information, or investigations of the Company or, to the
Company's knowledge, of its agents, officers or employees, whether pending or
threatened, which involve allegations of criminal violations by the Company or
its agents, officers or employees of the Company of any Federal, state, or local
statute, law, or ordinance.

         SECTION 2.31. YEAR 2000. To the knowledge of the Company, all of the
software and Hardware (as defined below) developed or obtained by the Company
for its customers, and all of the software and Hardware owned, used, or licensed
by the Company, are Year 2000 Compliant (as defined below). "Year 2000
Compliant" shall mean that the software and Hardware will correctly calculate,
compare, sort, extract, sequence, store, and otherwise process date related
information and associated date calculations, without creating any logical or
mathematical inconsistencies, or loss or degradation of functionality or
performance for dates before, during and after the year 2000. "Hardware" shall
mean any piece of equipment used in or for the operation of the Company or
obtained by the Company for its customers, as the case may be, including,
without limitation, any computer or communications system and network.

         SECTION 2.32. INVESTMENT COMPANY. The Company is not an "investment
company" or a company "controlled" by an "investment company" within the meaning
of the Investment Company Act of 1940, as amended.

                                    ARTICLE 3

                 REPRESENTATIONS AND WARRANTIES OF THE PURCHASER

           The Purchaser represents and warrants to the Company as of the date
hereof that:

         SECTION 3.1. ORGANIZATION. The Purchaser is organized and in good
standing under the laws of the State of California and the principal executive
office of the Purchaser is located in the State of California.

         SECTION 3.2. POWER AND AUTHORIZATION. The execution, delivery and
performance by the Purchaser of the Transaction Documents are within the powers
of the Purchaser and have been

                                       16

<PAGE>

duly authorized by all necessary action on the part of the Purchaser. This
Agreement has been duly executed and delivered by the Purchaser and this
Agreement and each of the Transaction Documents, when executed and delivered in
accordance with this Agreement, will constitute a valid and binding agreement of
the Purchaser enforceable against the Purchaser in accordance with its terms,
except as the enforcement of any of such Transaction Documents may be limited by
applicable bankruptcy, insolvency, reorganization, moratorium or other similar
laws relating to or affecting creditors' rights generally and by equitable
principles.

         SECTION 3.3.  PURCHASE FOR INVESTMENT.

                  (a) The Purchaser is an "accredited investor" within the
         meaning of Rule 501 under the Securities Act and was not organized for
         the specific purpose of acquiring the Convertible Notes;

                  (b) The Purchaser has sufficient knowledge and experience in
         investing in companies similar to the Company in terms of the Company's
         stage of development and other relevant factors so as to be able to
         evaluate the risks and merits of its investment in the Company and it
         is able financially to bear the risks thereof;

                  (c) The Purchaser has had an opportunity to discuss the terms
         of the offering and sale of the Convertible Notes and the Company's
         business, management and financial affairs with the Company's
         management and to obtain any additional information regarding the
         foregoing which the Company possesses or can acquire without
         unreasonable effort or expense;

                  (d) The Convertible Notes are being acquired for the
         Purchaser's own account and not with a view to, or the intention of,
         any distribution in violation of the Securities Act or any applicable
         state securities laws;

                  (e) The Purchaser understands that (i) neither the Convertible
         Notes nor the Note Shares have been registered under the Securities Act
         by reason of the issuance of the Convertible Notes in a transaction
         exempt from the registration requirements of the Securities Act
         pursuant to Section 4(2) thereof or Rule 505 or 506 promulgated under
         the Securities Act, (ii) the Convertible Notes and the Note Shares must
         be held indefinitely unless a subsequent disposition thereof is
         registered under the Securities Act or is exempt from such
         registration, (iii) the Convertible Notes and the Note Shares will bear
         a legend to such effect and (iv) the Company will make a notation on
         its transfer books to such effect. Subject to the foregoing and to the
         terms of the Shareholders Agreement, the Purchaser may at any time
         after the Closing, or from time to time thereafter, distribute any or
         all of its Convertible Notes or the Note Shares to a Permitted
         Transferee (as defined in the Shareholders Agreement).

                                    ARTICLE 4

                                       17

<PAGE>

                          CONDITIONS TO THE OBLIGATIONS

         SECTION 4.1. CONDITIONS TO THE OBLIGATIONS OF THE PURCHASER. (a) The
obligation of the Purchaser to purchase and pay for the Convertible Notes is
subject to the satisfaction, on or before the date of the Closing, of the
following conditions:

                 (i) OPINION OF COMPANY'S COUNSEL. The Purchaser shall have
         received from Roberts, Sheridan & Kotel, a Professional Corporation,
         counsel for the Company, an opinion dated the date of the Closing, in
         form and scope satisfactory to the Purchaser and its counsel, to the
         effect that:

                           (A) The Company is a corporation duly incorporated,
                  validly existing and subsisting under the laws of its
                  jurisdiction of incorporation, except that such counsel shall
                  not be required to express any opinion with respect to the
                  Company's failure to file a General Corporate Business
                  Franchise Tax Return in New York with respect to its 1993 tax
                  year. Based solely on a review of good standing certificates
                  by such counsel, the Company is duly licensed or qualified to
                  transact business as a foreign corporation and is in good
                  standing in each other jurisdiction in which, to the knowledge
                  of such counsel, it is required to be so qualified, except
                  that such counsel shall not be required to express any opinion
                  with respect to the absence of qualification in Illinois,
                  Georgia, California or Texas. To the knowledge of such
                  counsel, Schedule II to this Agreement contains a complete
                  list of all subsidiaries of the Company and each of such
                  subsidiaries is wholly-owned, directly or indirectly, by the
                  Company. The Company has the corporate power and authority to
                  own and hold its properties and to carry on its business as
                  currently conducted. The Company has the corporate power and
                  authority to execute, deliver and perform the Transaction
                  Documents and to issue and deliver the Note Shares in
                  accordance with the terms of the Convertible Notes and the
                  Charter.

                           (B) The Transaction Documents have been duly
                  authorized, executed and delivered by the Company and
                  constitute the valid and binding obligations of the Company,
                  enforceable in accordance with their respective terms (subject
                  to applicable bankruptcy, reorganization, insolvency,
                  moratorium and similar laws affecting the rights of creditors
                  generally and to general principles of equity, regardless of
                  whether enforcement is sought in equity or at law), except
                  that such counsel need not express any opinion as to the
                  validity or enforceability of the indemnification and
                  contribution provisions of the Registration Rights Agreement.

                           (C) The execution and delivery by the Company of the
                  Transaction Documents, the performance by the Company of its
                  obligations thereunder and the issuance, sale and delivery of
                  the Convertible Notes, will not violate any provision of
                  federal or New York law, the Charter or By-laws of the
                  Company,

                                       18

<PAGE>

                  any order of any court or other agency of government known to
                  such counsel or any material indenture, agreement or other
                  instrument, identified to such counsel in an officer's
                  certificate provided by the Company, to which the Company or
                  any of its properties or assets is bound, or conflict with,
                  result in a breach of or constitute (with due notice or lapse
                  of time or both) a default under any such indenture, agreement
                  or other instrument, or result in the creation or imposition
                  of any Lien upon any of the properties or assets of the
                  Company or any of its subsidiaries pursuant to any such
                  indenture, agreement or other instrument. In rendering the
                  foregoing opinion, such counsel may assume full disclosure to
                  the Purchaser of all material facts and may rely, as to
                  factual matters, on the representations of the Purchaser and
                  the Company contained in the Transaction Documents and, with
                  respect to performance by the Company of its obligations under
                  the Registration Rights Agreement, may assume compliance by
                  the Company at such time with the registration requirements of
                  the Securities Act and with applicable state securities laws
                  and may disclaim any opinion as to the validity or
                  enforceability of the indemnification and contribution
                  provisions of the Registration Rights Agreement.

                           (D) The authorized capital stock of the Company
                  consists of (a) 5,000,000 shares of Preferred Stock, of which
                  170,000 shares have been designated Series A Preferred Stock,
                  1,620,700 have been designated Series B Preferred Stock and
                  1,650,000 have been designated Series C Preferred Stock and
                  (b) 150,000,000 shares of Common Stock. Immediately prior to
                  the Closing, based solely on a review of the Company's stock
                  transfer ledger, 76,371,375 shares of Common Stock (exclusive
                  of Additional Option Shares), 99,804.2276 shares of Series A
                  Preferred Stock, 1,077,026 shares of Series B Preferred Stock
                  and no shares of Series C Preferred Stock will have been
                  issued. The Company has reserved 21,303,000 shares of Common
                  Stock for issuance pursuant to the 1998 Plan of which, to such
                  counsel's knowledge, 15,014,883 shares (adjusted for the
                  issuance of options after the date of this Agreement) are
                  subject to outstanding unexercised options. To such counsel's
                  knowledge, immediately prior to the Closing, the shareholders
                  of record and holders of record of subscriptions, warrants,
                  options, convertible securities, and other rights (contingent
                  or other) to purchase or otherwise acquire equity securities
                  of the Company, and the number of shares of Common Stock and
                  the number of such subscriptions, warrants, options,
                  convertible securities, and other such rights held by each,
                  will be as set forth in Schedule III (subject to adjustment
                  for the issuance and exercise of employee stock options
                  between the date hereof and the date of the Closing and for
                  transfers in accordance with the Existing Shareholders
                  Agreement). The designations, powers, preferences, rights,
                  qualifications, limitations and restrictions in respect of
                  each class or series of authorized capital stock of the
                  Company are as set forth in the Charter, and all such
                  designations, powers, preferences, rights, qualifications,
                  limitations and restrictions are valid, binding and
                  enforceable and in accordance with all applicable laws
                  (subject to applicable

                                       19

<PAGE>

                  bankruptcy, reorganization, insolvency, moratorium and similar
                  laws affecting the rights of creditors generally and to
                  general principles of equity, regardless of whether
                  enforcement is sought in equity or at law). Except as set
                  forth in Schedule III and except for the Convertible Notes and
                  employee stock options issued after the date hereof, to the
                  knowledge of such counsel, immediately prior to the Closing no
                  subscription, warrant, option, convertible security, or other
                  right (contingent or other) to purchase or acquire equity
                  securities of the Company will be authorized or outstanding
                  and there will be no commitment by the Company to issue
                  shares, subscriptions, warrants, options, convertible
                  securities, or other such rights or to distribute to holders
                  of any of its equity securities any evidence of indebtedness
                  or asset. Except as set forth in Schedule III or as provided
                  for in this Agreement and in the Charter, to the knowledge of
                  such counsel the Company has no obligation (contingent or
                  other) to purchase, redeem or otherwise acquire any of its
                  equity securities or any interest therein or to pay any
                  dividend or make any other distribution in respect thereof.
                  Except for this Agreement, the Existing Shareholders Agreement
                  and the stock option agreements between the Company and each
                  optionholder of the Company, to such counsel's knowledge there
                  are no voting trusts or agreements, shareholders' agreements,
                  pledge agreements, buy-sell agreements, rights of first
                  refusal, preemptive rights or proxies relating to any
                  securities of the Company or any of its subsidiaries (whether
                  or not the Company or any of its subsidiaries is a party
                  thereto).

                           (E) The issuance and delivery of the Note Shares have
                  been duly authorized by all required corporate action and,
                  when delivered against the purchase price therefore, said
                  shares will have been validly issued, and will be fully paid
                  and nonassessable with no personal liability attaching to the
                  ownership thereof (other than such liability, if any, as may
                  be (i) imposed by Section 630 of the New York Business
                  Corporation law or (ii) attributable to acts of the Purchaser)
                  and, to the knowledge of such counsel, will be free and clear
                  of all Liens. Such counsel will not be required to express any
                  opinion with respect to veil piercing or comparable bases of
                  liability. Neither the issuance, sale nor delivery of the Note
                  Shares is subject to any preemptive right of shareholders of
                  the Company arising under law or the Charter or By-laws of the
                  Company, each as amended, that has not been waived or, to the
                  knowledge of such counsel, to any contractual right of first
                  refusal or other right in favor of any person.

                           (F) Except as described in Schedule I, to the
                  knowledge of such counsel, there is no (a) action, suit,
                  claim, proceeding or investigation pending or threatened by or
                  against the Company or any of its subsidiaries, at law or in
                  equity, or before or by any Federal, state, municipal or other
                  governmental department, commission, board, bureau, agency or
                  instrumentality, domestic or foreign, (b) arbitration
                  proceeding relating to the Company or any of its subsidiaries
                  pending under collective bargaining agreements or (c)
                  governmental inquiry pending or threatened against the Company
                  or any of its subsidiaries

                                       20

<PAGE>

                  (including, without limitation, any inquiry as to the
                  qualification of the Company or any of its subsidiaries to
                  hold or receive any license or permit). To the knowledge of
                  such counsel, neither the Company nor any of its subsidiaries
                  is in default with respect to any order, writ, injunction or
                  decree known to such counsel of any court or of any Federal,
                  state, municipal or other governmental department, commission,
                  board, bureau, agency or instrumentality, domestic or foreign.

                           (G) Assuming the accuracy of the representations and
                  warranties of the Purchaser set forth in Article 3, no
                  registration or filing with, and no consent or approval of, or
                  other action by any Federal, state or other governmental
                  agency or instrumentality is or will be necessary for the
                  valid execution, delivery and performance by the Company of
                  the Transaction Documents, the issuance, sale and delivery of
                  the Convertible Notes or the issuance and delivery of the Note
                  Shares under the circumstances contemplated by the Transaction
                  Documents and the Charter other than filings pursuant to New
                  York securities laws (all of which filings, other than those
                  which are permitted to be made after the Closing, have been
                  made by the Company). In rendering the foregoing opinion with
                  respect to performance by the Company of its obligations under
                  the Registration Rights Agreement, such counsel may assume
                  compliance by the Company at such time with the registration
                  requirements of the Securities Act and with applicable state
                  securities laws and may disclaim any opinion as to the
                  validity or enforceability of the indemnification and
                  contribution provisions of the Registration Rights Agreement.

                           (H) To such counsel's knowledge, all of the
                  Convertible Notes to be issued to the Purchaser will be issued
                  in compliance with the registration requirements of the
                  Securities Act and all applicable New York securities laws.

                           (I) Other than approvals or consents which have been
                  obtained in accordance with all applicable laws and
                  agreements, no approval or consent of or from any holder of
                  indebtedness of which such counsel has knowledge or any
                  security of the Company of which such counsel has knowledge is
                  required by law or by the Certificate of Incorporation or
                  Bylaws, or by any indenture, agreement or other instrument,
                  identified to such counsel in an officer's certificate
                  provided by the Company, to which the Company or any
                  subsidiary is a party or by which its property is bound in
                  connection with the issuance and delivery of the Convertible
                  Notes or the Note Shares and the performance of the Company's
                  obligations under the Transaction Documents.

                 (ii) REPRESENTATIONS AND WARRANTIES TO BE TRUE. The
         representations and warranties contained in Sections 2.1, 2.2, 2.3,
         2.4, 2.5 (other than clause (i) of than the last sentence thereof and,
         to the extent any Material Adverse Effect is attributable to activities
         in furtherance of the Company's expansion of its business operations or
         its financing activities with Brown Brothers Harriman, clause (ii) of
         such sentence), 2.6 (but

                                       21

<PAGE>

         only to the extent any failure of the representations and warranties
         contained in such section to be true on and as of the Closing Date
         shall have a Material Adverse Effect that is not attributable to
         activities in furtherance of the Company's expansion of its business
         operations or its financing activities with Brown Brothers Harriman),
         2.7 (but only to the extent any failure of the representations and
         warranties contained in such section to be true on and as of the
         Closing Date shall have a Material Adverse Effect that is not
         attributable to activities in furtherance of the Company's expansion of
         its business operations or its financing activities with Brown Brothers
         Harriman), 2.18, 2.21and 2.31 that are qualified as to materiality
         shall be true and correct and the representations and warranties in
         such sections that are not so qualified shall be true and correct in
         all material respects on and as of the date of the Closing with the
         same effect as though such representations and warranties had been made
         on and as of such date (except to the extent that such representations
         and warranties are made as of an earlier date), and the President and
         Treasurer of the Company shall have certified to such effect to the
         Purchaser in writing.

                (iii) PERFORMANCE. The Company shall have performed and complied
         in all material respects with all agreements contained herein required
         to be performed or complied with by it prior to or at the date of the
         Closing, and the President and Treasurer of the Company shall have
         certified to the Purchaser in writing to such effect.

                 (iv) ALL PROCEEDINGS TO BE SATISFACTORY. All corporate and
         other proceedings to be taken by the Company in connection with the
         transactions contemplated hereby and all documents incident thereto
         shall be reasonably satisfactory in form and substance to the Purchaser
         and their counsel, and the Purchaser and its counsel shall have
         received all such counterpart originals or certified or other copies of
         such documents as they reasonably may request.

                  (v) SUPPORTING DOCUMENTS. The Purchaser and its counsel shall
         have received copies of the following documents:

                           (A) (a) the Charter, certified as of a recent date by
                  the Secretary of State of the State of New York, (b) a
                  certificate of said Secretary dated as of a recent date as to
                  the due incorporation and good standing of the Company, the
                  payment of all franchise taxes by the Company and listing all
                  documents of the Company on file with said Secretary and (c) a
                  certificate of the Secretary of State of the jurisdiction of
                  incorporation of each of the Company's subsidiaries dated as
                  of a recent date as to the due incorporation and good standing
                  of such subsidiary;

                           (B) a certificate of the Secretary or an Assistant
                  Secretary of the Company dated the date of the Closing and
                  certifying: (a) that attached thereto is a true and complete
                  copy of the By-laws of the Company as in effect on the date of
                  such certification; (b) that attached thereto is a true and
                  complete copy of all resolutions adopted by the Board of
                  Directors and the shareholders of the

                                       22

<PAGE>

                  Company authorizing the execution, delivery and performance of
                  the Transaction Documents and the issuance, sale and delivery
                  of the Convertible Notes, and that all such resolutions are in
                  full force and effect and are all the resolutions adopted in
                  connection with the transactions contemplated by the
                  Transaction Documents; (c) that the Charter has not been
                  amended since the date of the last amendment referred to in
                  the certificate delivered pursuant to clause (A)(b) above; and
                  (d) to the incumbency and specimen signature of each officer
                  of the Company executing any of the Transaction Documents or
                  any certificate or instrument furnished pursuant hereto, and a
                  certification by another officer of the Company as to the
                  incumbency and signature of the officer signing the
                  certificate referred to in this clause (B); and

                           (C) such additional supporting documents and other
                  information with respect to the operations and affairs of the
                  Company as the Purchaser or its counsel reasonably may
                  request.

                 (vi) TRANSACTION DOCUMENTS. Each of the parties to each
         Transaction Document (other than this Agreement), other than the
         Purchaser, shall have executed and delivered such Transaction Document
         and, assuming due execution and delivery of such Transaction Document
         by the Purchaser, if applicable, such Transaction Document shall be in
         full force and effect.

                (vii) CERTAIN EMPLOYMENT ARRANGEMENTS. Each employee of the
         Company whose employment commenced at least 10 business days prior to
         the Closing Date shall have entered into an Employee Non-Solicitation
         and Non-Disclosure Agreement in the form attached as Exhibit F and each
         employee of Company who has been granted any stock options shall have
         entered into a stock option agreement in the form attached as Annex B
         to the Shareholders Agreement and each such agreement shall be in full
         force and effect.

               (viii) CHARTER. The Charter Amendment shall have been duly filed
         with the Secretary of State of the State of New York and become
         effective and the Charter shall read in its entirety as set forth in
         Exhibit E. The Bylaws shall have been duly authorized and adopted in
         form and substance as set forth in Exhibit H attached hereto, shall be
         in full force and effect under the laws of New York as of the Closing
         and shall not have been further amended or modified.

                 (ix) WAIVERS AND CONSENTS. All shareholders of the Company
         having any preemptive, first refusal or other rights with respect to
         the issuance of the Convertible Notes or the Note Shares shall have
         irrevocably waived the same in writing. The Company shall have obtained
         all other material consents and waivers necessary or advisable to
         execute and deliver the Transaction Documents and issue and deliver the
         Convertible Notes and the Note Shares and all such consents and waivers
         shall be in full force and effect.

                                       23

<PAGE>

                  (x) FEES OF PURCHASER'S COUNSEL. The Company shall have paid
         in accordance with Section 6.1 the reasonable fees and disbursements of
         Purchaser's counsel (not in excess of $20,000) invoiced at or after the
         Closing.

         All such documents shall be satisfactory in form and substance to the
Purchaser and its counsel.

         SECTION 4.2. CONDITIONS TO THE OBLIGATIONS OF THE COMPANY. The
obligation of the Company to issue and deliver the Convertible Notes being
purchased by the Purchaser at the Closing is subject to the satisfaction, on or
before the date of the Closing, of the following conditions:

                  (i) REPRESENTATIONS AND WARRANTIES TO BE TRUE. The
         representations and warranties contained in Article 3 shall be true on
         and as of the date of the Closing with the same effect as though such
         representations and warranties had been made on and as of such date;
         and the Purchaser shall have certified to such effect to the Company in
         writing.

                 (ii) CHARTER. The Charter Amendment shall have been duly filed
         with the Secretary of State of the State of New York and become
         effective and the Charter shall read in its entirety as set forth in
         Exhibit E.

                                    ARTICLE 5

                            COVENANTS OF THE COMPANY

         The Company covenants and agrees with the Purchaser that:

         SECTION 5.1. FINANCIAL STATEMENTS, REPORTS, ETC. The Company shall
furnish to the Purchaser:

          (a) within 90 days after the end of each fiscal year of the Company a
consolidated balance sheet of the Company and its subsidiaries, if any, as of
the end of such fiscal year and the related consolidated statements of income,
shareholders' equity and cash flows for the fiscal year then ended, prepared in
accordance with generally accepted accounting principles and audited by a firm
of independent public accountants of recognized national standing selected by
the Board of Directors of the Company or the Audit Committee thereof;

          (b) within 20 days after the end of each month in each fiscal year
(other than the last month in each fiscal year) a profit and loss statement and
sales report for such month certified by the Chief Financial Officer (or if
there is none, the President) of the Company;

          (c) within 45 days after the end of each quarter in each fiscal year
(other than the last quarter in each fiscal year) a consolidated balance sheet
of the Company and its subsidiaries, if

                                       24

<PAGE>

any, and the related consolidated statements of income, shareholders' equity and
cash flows, unaudited but prepared in accordance with generally accepted
accounting principles and certified by the Chief Financial Officer (or if there
is none, the President) of the Company, such consolidated balance sheet to be as
of the end of such quarter and such consolidated statements of income,
shareholders' equity and cash flows to be for such quarter and for the period
from the beginning of the fiscal year to the end of such quarter, in each case
with comparative statements for the prior fiscal year;

          (d) at the time of delivery of each annual financial statement
pursuant to Section 5.1(a), a certificate executed by the Chief Financial
Officer (or if there is none, the President) of the Company stating that such
officer has caused this Agreement and the Series B Preferred Stock to be
reviewed and has no knowledge of any default by the Company in the performance
or observance of any of the provisions of this Agreement or the Series B
Preferred Stock or, if such officer has such knowledge, specifying such default
and the nature thereof;

          (e) at the time of delivery of each quarterly statement pursuant to
Section 5.1(c), a management narrative report explaining all significant
variances from forecasts and all significant current developments related to
executive hiring and geographic expansion;

          (f) prior to the start of each fiscal year, consolidated capital and
operating expense budgets, cash flow projections and income and loss projections
for the Company and its subsidiaries in respect of such fiscal year, all
itemized in reasonable detail and prepared on a monthly basis, and, promptly
after preparation, any material revisions to any of the foregoing;

          (g) promptly following receipt by the Company, each audit response
letter, accountant's management letter and other written report submitted to the
Company by its independent public accountants in connection with an annual or
interim audit of the books of the Company or any of its subsidiaries;

          (h) promptly after the commencement thereof, notice of all actions,
suits, claims, proceedings, investigations and inquiries of the type described
in Sections 2.7 and 2.30 that could materially adversely affect the Company or
any of its subsidiaries, if any;

          (i) promptly upon sending, making available or filing the same, all
press releases, reports and financial statements that the Company sends or makes
available to its shareholders or files with the Commission; and

          (j) promptly, from time to time, such other information regarding the
business, prospects, financial condition, operations, property or affairs of the
Company and its subsidiaries as the Purchaser reasonably may request, PROVIDED,
that the Company shall not be required to disclose to the Purchaser pursuant to
this Section 5.1, or otherwise pursuant to this Agreement, any information which
is the property of a third party and with respect to which the Company or any of
its subsidiaries is under an obligation of confidentiality ("PROTECTED THIRD
PARTY INFORMATION").

                                       25

<PAGE>

         SECTION 5.2. CORPORATE EXISTENCE. The Company shall maintain and,
except as otherwise permitted by Section 5.10, cause each of its subsidiaries to
maintain, their respective corporate existence, rights and franchises in full
force and effect.

         SECTION 5.3. PROPERTIES, BUSINESS, INSURANCE. The Company shall
maintain and cause each of its subsidiaries to maintain as to their respective
properties and business, with financially sound and reputable insurers,
insurance against such casualties and contingencies and of such types and in
such amounts as is customary for companies similarly situated, which insurance
shall be deemed by the Company to be sufficient.

         SECTION 5.4. INSPECTION, CONSULTATION AND ADVICE. The Company shall
permit and cause the of its subsidiaries to permit the Purchaser and such
persons as it may designate, at the Purchaser's expense, to visit and inspect
any of the properties of the Company and its subsidiaries, examine their books
and take copies and extracts therefrom, and discuss the affairs, finances and
accounts of the Company and its subsidiaries with their officers, employees and
public accountants (and the Company hereby authorizes said accountants to
discuss with the Purchaser and such designees such affairs, finances and
accounts), all at reasonable times and upon reasonable notice.

         SECTION 5.5. CONFIDENTIALITY AGREEMENT. The Purchaser shall use its
best efforts to ensure that any information which is delivered by the Company to
the Purchaser pursuant to Section 5.1 or 5.4 will be kept confidential, not be
copied except for internal use, and be used solely to monitor and protect the
Purchaser's investment in the Convertible Notes; PROVIDED, that the foregoing
obligation shall not prohibit any the Purchaser from divulging any information,
whether or not confidential, (i) to the extent required, to any regulatory
authority having jurisdiction over the Purchaser, (ii) if the Purchaser is
compelled to do so by any judicial or administrative process or by other
requirements of law, after giving the Company notice and an opportunity to
oppose such disclosure or to seek confidential treatment in connection
therewith, in each case to the extent reasonably practicable or (iii) except for
(x) Protected Third Party Information or (y) in the case of any prospective
purchaser that is an actual or potential competitor of the Company, proprietary
or technical information of the Company or any of its subsidiaries, or
information the disclosure of which could reasonable be expected to result in a
competitive disadvantage to the Company or any of its subsidiaries, to any
prospective purchaser of Convertible Notes from the Purchaser in a transaction
exempt from the registration requirements of the Securities Act and not effected
through the facilities of a securities exchange or quotation system so long as
such prospective purchaser agrees to be bound by the confidentiality provisions
contained herein; and PROVIDED, FURTHER, that the foregoing obligation shall
remain in effect as to any confidential information except to the extent that
such information can be shown to have been (i) previously known on a
nonconfidential basis by the Purchaser, (ii) in the public domain through no
fault of the Purchaser, (iii) later lawfully acquired by the Purchaser from
sources other than the Company or any subsidiary other than information known by
the Purchaser to be acquired in violation of an existing confidentiality
agreement or (iv) independently developed by the Purchaser. The obligation of
the Purchaser to hold any

                                       26

<PAGE>

confidential information in confidence shall be satisfied if the Purchaser
exercises the same care with respect to such information as it would take to
preserve the confidentiality of its own similar information.

         SECTION 5.6. RESTRICTIVE AGREEMENTS PROHIBITED. Neither the Company nor
any of its subsidiaries shall become a party to any agreement which by its terms
restricts the Company's performance of any of the Transaction Documents, or the
Charter as it may be amended from time to time.

         SECTION 5.7. TRANSACTIONS WITH AFFILIATES. Except for transactions
contemplated by this Agreement or as otherwise approved by the Board of
Directors, neither the Company nor any of its subsidiaries shall enter into any
transaction with any director, officer, employee or holder of more than five
percent of the outstanding capital stock of any class or series of capital stock
of the Company or any of its subsidiaries, member of the family of any such
person, or any corporation, partnership, trust or other entity in which any such
person, or member of the family of any such person, is a director, officer,
trustee, partner or holder of more than five percent of the outstanding capital
stock thereof, except for transactions on customary terms related to such
person's employment.

         SECTION 5.8. BY-LAWS. The Company shall at all times maintain
provisions in its By-laws and/or Charter indemnifying all directors against
liability and absolving all directors from liability to the Company and its
shareholders to the maximum extent permitted under the laws of the State of New
York.

         SECTION 5.9. EMPLOYEE NON-SOLICITATION AND NON-DISCLOSURE AGREEMENTS.
The Company shall use commercially reasonable efforts to obtain, and shall cause
its subsidiaries to use commercially reasonable efforts to obtain, an Employee
Non-Solicitation and Non-Disclosure Agreement in substantially the form of
Exhibit F and a Noncompetition Agreement in substantially the form of Exhibit I
from all future officers and key employees of the Company or any of its
subsidiaries, upon their employment by the Company or any of its subsidiaries.

         SECTION 5.10. ACTIVITIES OF SUBSIDIARIES. Except as approved by at
least 70% of the members of the entire Board of Directors, the Company will not
(a) organize or acquire any entity that is a subsidiary unless such subsidiary
is wholly-owned (directly or indirectly) by the Company; (b) permit any
subsidiary to consolidate or merge into or with or sell or transfer all or
substantially all its assets, except that any subsidiary may (i) consolidate or
merge into or with or sell or transfer assets to any other subsidiary, (ii)
merge into or sell or transfer assets to the Company or (iii) subject its assets
to the lien of, and the potential exercise of remedies contained in, an Approved
Third Party Credit Agreement (as defined in the Charter); (c) sell or otherwise
transfer any shares of capital stock of any subsidiary, except to the Company or
another subsidiary, or permit any subsidiary to issue, sell or otherwise
transfer any shares of its capital stock or the capital stock of any subsidiary,
except to the Company or another subsidiary; or (d) permit any subsidiary to
purchase or set aside any sums for the purchase of, or pay any dividend

                                       27

<PAGE>

or make any distribution on, any shares of its stock, except for dividends or
other distributions payable to the Company or another subsidiary.

         SECTION 5.11. COMPLIANCE WITH LAWS. The Company shall comply, and cause
each subsidiary to comply, with all applicable laws, rules, regulations and
orders, noncompliance with which could materially adversely affect its business
or condition, financial or otherwise.

         SECTION 5.12. KEEPING OF RECORDS AND BOOKS OF ACCOUNT. The Company
shall keep, and cause each subsidiary to keep, adequate records and books of
account, in which complete entries will be made in accordance with generally
accepted accounting principles consistently applied, reflecting all financial
transactions of the Company and such subsidiary, and in which, for each fiscal
year, all reserves required by generally accepted accounting principles for
depreciation, depletion, obsolescence, amortization, taxes, bad debts and other
purposes in connection with its business shall be made.

         SECTION 5.13. CHANGE IN NATURE OF BUSINESS. The Company shall not make,
or permit any subsidiary to make, any material change in the nature of its
business as it is conducted on the date hereof.

         SECTION 5.14. RULE 144A INFORMATION. The Company shall, at all times
during which it is neither subject to the reporting requirements of Section 13
or 15(d) of the Securities Exchange Act of 1934, as amended (the "EXCHANGE
ACT"), nor exempt from reporting pursuant to Rule 12g3-2(b) under the Exchange
Act, provide in writing, upon the written request of the Purchaser or a
prospective buyer of Convertible Notes from the Purchaser, all information
required by Rule 144A(d)(4)(i) of the General Regulations promulgated by the
Commission under the Securities Act ("RULE 144A INFORMATION"). The Company also
shall, upon the written request of the Purchaser, cooperate with and assist the
Purchaser or any member of the National Association of Securities Dealers, Inc.
PORTAL system in applying to designate and thereafter maintain the eligibility
of the Convertible Notes for trading through PORTAL. The Company's obligations
under this Section shall at all times be contingent upon the Purchaser's
obtaining from the prospective buyer of Convertible Notes a written agreement to
take all reasonable precautions to safeguard the Rule 144A Information from
disclosure to anyone other than a person who will assist such buyer in
evaluating the purchase of any Convertible Notes.

         SECTION 5.15. TERMINATION OF COVENANTS. (a) The covenants set forth in
Sections 5.1(a) through 5.1(d), 5.1(i) and 5.14 shall terminate and be of no
further force or effect when the Purchaser no longer beneficially owns any
shares of capital stock or rights to acquire capital stock of the Company.

         (b) All of the other covenants set forth in this Article 5 shall
terminate and be of no further force or effect upon the earlier to occur of (i)
the Purchaser having sold or otherwise disposed of more than 75% of the number
of shares of Common Stock beneficially owned (within the meaning of Rule 13d-3
under the Securities Exchange Act of 1934, as amended) by it (appropriately
adjusted to reflect stock splits, stock dividends, combinations of shares and
the

                                       28

<PAGE>

like) immediately following the Closing or (ii) the completion of an
underwritten public offering of equity securities of the Company pursuant to an
effective registration statement under the Securities Act other than pursuant to
a registration statement on Form S-4 or Form S-8 or any successor or similar
form in which at least $20 million of gross proceeds are received by the
Company; PROVIDED that the covenant set forth in Section 5.5 shall terminate and
be of no further force or effect on the third anniversary of the termination of
all other covenants in this Article 5 as provided in this sentence.

                                    ARTICLE 6

                                  MISCELLANEOUS

         SECTION 6.1. EXPENSES. Each party hereto will pay its own expenses in
connection with the transactions contemplated by the Transaction Documents,
whether or not such transactions shall be consummated; PROVIDED that the Company
shall pay up to $20,000 of the reasonable fees and disbursements of the
Purchaser's special counsel, Brobeck, Phleger & Harrison LLP, in connection with
such transactions and any subsequent amendment, waiver, consent or enforcement
thereof, but only if the Closing is consummated.

         SECTION 6.2. SURVIVAL OF AGREEMENTS. All covenants, agreements,
representations and warranties made in any of the Transaction Documents or any
certificate or instrument delivered to the Purchaser pursuant to or in
connection with any of the Transaction Documents, shall survive the execution
and delivery of all of the Transaction Documents, the issuance, sale and
delivery of the Convertible Notes, and all statements contained in any
certificate or other instrument delivered by the Company hereunder or thereunder
or in connection herewith or therewith shall be deemed to constitute
representations and warranties made by the Company.

         SECTION 6.3. BROKERAGE. Each party hereto will indemnify and hold
harmless the others against and in respect of any claim for brokerage or other
commissions relative to this Agreement or to the transactions contemplated
hereby, based in any way on agreements, arrangements or understandings made or
claimed to have been made by such party with any third party.

         SECTION 6.4. STAMP TAX. The Company will pay all federal or New York
stamp and other taxes, if any, which may be payable in respect of the sale of
the Convertible Notes to the Purchaser and the issuance thereof to the
Purchaser, and will save the Purchaser harmless against any loss or liability
resulting from nonpayment or delay in payment of any such tax.

         SECTION 6.5. PARTIES IN INTEREST. All representations, covenants and
agreements contained in this Agreement by or on behalf of any of the parties
hereto shall bind and inure to the benefit of the respective successors and
assigns of the parties hereto whether so expressed or not. Notwithstanding the
foregoing, neither this Agreement nor any right, remedy, obligation or liability
arising hereunder or by reason hereof shall be assignable (including by
operation of law)

                                       29

<PAGE>

by any party without the consent of the other parties hereto; PROVIDED that (i)
all representations, covenants and agreements benefiting the Purchaser (other
than Sections 5.1(e) through 5.1(h), 5.1(j), 5.4 and 6.1, which shall be
transferable only to a Permitted Transferee (as defined in the Shareholders
Agreement) of a Purchaser), shall inure to the benefit of any and all subsequent
holders from time to time of the Convertible Notes to whom the Purchaser shall
have executed a written assignment of its rights with respect to such
representations, covenants and agreements, which subsequent holders shall,
subject to clause (iii) below, collectively be deemed to be the "Purchaser" for
the purposes of this Agreement; (ii) the Purchaser may not transfer its rights
under Sections 5.1(a) through 5.1(d) and 5.1(i) to more than one person (who
shall be the sole holder of such rights) and (iii) a person to whom such
assignment is made who is not a Permitted Transferee shall not constitute the
"Purchaser" for purposes of Section 5.15 hereof with respect to the time at
which any obligation of the Company shall terminate. Nothing in this Agreement,
expressed or implied, is intended to confer on any person other than the parties
hereto, and their respective successors and permitted assigns, any rights,
remedies, obligations or liabilities under or by reason of this Agreement.

         SECTION 6.6. NOTICES. All notices, requests, consents and other
communications hereunder shall be in writing and shall be delivered in person,
mailed by certified or registered mail, return receipt requested, or sent by
telecopier, addressed as follows:

          (a) if to the Company, at 545 Fifth Avenue, 14th Floor, New York, New
York, 10017, Attention: Rami Musallam, President, telecopier number (917)
542-5525, with a copy to Kenneth G. Alberstadt, Esq., Roberts, Sheridan & Kotel,
a Professional Corporation, 12 East 49th Street, 30th Floor, New York, New York
10017, telecopier number (212) 299-8686; and

          (b) if to the Purchaser, at the address of the Purchaser set forth on
the signature pages hereof, with a copy to Therese A. Mrozek, Esq., Brobeck,
Phleger & Harrison, LLP, Two Embarcadero Place, 2200 Geng Road, Palo Alto,
California 94303-0913, telecopier number (650) 496-2885;

or, in any such case, at such other address or addresses as shall have been
furnished in writing by such party to the others.

         SECTION 6.7. GOVERNING LAW. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York, without regard
to the conflicts of law principles thereof.

         SECTION 6.8. ENTIRE AGREEMENT. The Transaction Documents constitute the
entire agreement and understanding between the parties hereto and thereto in
respect of the subject matter contained herein and therein, and there are no
restrictions, promises, representations, warranties, covenants, or undertakings
with respect to the subject matter hereof or thereof, other than those expressly
set forth or referred to herein or therein; PROVIDED that all Schedules and
Exhibits hereto are hereby incorporated herein by reference. The Transaction
Documents

                                       30

<PAGE>

supersede all prior agreements and understandings between the parties hereto and
thereto with respect to the subject matter hereof and thereof. No statement,
representation, warranty, covenant or agreement of any kind not expressly set
forth in the Transaction Documents shall affect, or be used to interpret, change
or restrict, the express terms and provisions of the Transaction Documents. The
Series B Convertible Preferred Stock Purchase Agreement dated as of May 13, 1999
between the Company and Cisco and any rights and remedies of the parties
thereunder shall terminate upon the Closing.

         SECTION 6.9. COUNTERPARTS. This Agreement may be executed in two or
more counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

         SECTION 6.10. WAIVERS; AMENDMENTS. (a) No failure or delay on the part
of any party in exercising any right, power or privilege hereunder shall operate
as a waiver thereof, nor shall any single or partial exercise thereof preclude
any other or further exercise thereof or the exercise of any other right, power
or privilege. The rights and remedies herein provided shall be cumulative and
not exclusive of any rights or remedies provided by law.

          (b) Any provision of this Agreement may be amended or waived if, but
only if, such amendment or waiver is in writing and is signed, in the case of an
amendment, by the parties hereto or, in the case of a waiver, by the party or
parties against whom the waiver is to be effective.

         SECTION 6.11. SEVERABILITY. If any provision of this Agreement shall be
declared void or unenforceable by any judicial or administrative authority, the
validity of any other provision and of the entire Agreement shall not be
affected thereby.

         SECTION 6.12. TITLES AND SUBTITLES. The titles and subtitles used in
this Agreement are for convenience only and are not to be considered in
construing or interpreting any term or provision of this Agreement.

         SECTION 6.13. CERTAIN DEFINED TERMS. As used in this Agreement, the
following terms shall have the following meanings (such meanings to be equally
applicable to both the singular and plural forms of the terms defined):

          (a) "AFFILIATE" means with respect to any person, any other person
directly or indirectly controlling, controlled by or under common control with
such person. For the purposes of this definition, the term "CONTROL" (including
its correlative meanings, the terms "CONTROLLING", "CONTROLLED BY" and "UNDER
COMMON CONTROL WITH"), as used with respect to any person, shall mean the
possession, directly or indirectly, of the power to direct or cause the
direction of the management and policies of such person, whether through the
ownership of voting securities, by contract or otherwise.

                                       31

<PAGE>

          (b) "BENEFIT ARRANGEMENT" means each employment, severance or other
similar contract, arrangement or policy (written or oral) and each plan or
arrangement (written or oral) providing for severance benefits, insurance
coverage (including any self-insured arrangements), workers' compensation,
disability benefits, supplemental unemployment benefits, vacation benefits,
retirement benefits or for deferred compensation, profit-sharing, bonuses, stock
options, stock appreciation rights or other forms of incentive compensation or
postretirement insurance, compensation or benefits which (i) is not an Employee
Plan and (ii) covers any employee or former employee of the Company.

           (c) "BENEFICIAL OWNER" has the meaning ascribed to such term pursuant
to Rule 13d-3 under the Exchange Act.

          (d) "EMPLOYEE PLAN" means each "EMPLOYEE BENEFIT PLAN," as such term
is defined in Section 3(3) of ERISA, that (A)(i) is subject to any provision of
ERISA and (ii) is maintained or contributed to by the Company, or (B)(i) is
subject to any provision of Title IV of ERISA and (ii) is maintained or
contributed to by any of the Company's ERISA Affiliates.

          (e) "ERISA" means the Employee Retirement Income Security Act of 1974,
as amended.

          (f) "ERISA AFFILIATE" of any entity means any other entity that,
together with such entity, would be treated as a single employer under Section
414 of the Code.

          (g) information "KNOWN" by any entity means that the individuals
associated with such entity who, in the ordinary course of carrying their
employment function, would be expected to acquire such information have in fact
acquired such information and are consciously aware of the same.

          (h) "MULTIEMPLOYER PLAN" means each Employee Plan that is a
multiemployer plan, as defined in Section 3(37) of ERISA.

          (i) "PERSON" means an individual, corporation, trust, partnership,
limited liability company, joint venture, unincorporated organization,
government agency or any agency or political subdivision thereof, or other
entity.

          (j) "SUBSIDIARY" means, as to the Company, any corporation of which
more than 50% of the outstanding stock having ordinary voting power to elect a
majority of the Board of Directors of such corporation is at the time directly
or indirectly owned by the Company, or by one or more of its subsidiaries, or by
the Company and one or more of its subsidiaries.

         SECTION 6.14. INDEMNIFICATION. The Company shall indemnify and hold
harmless each holder of Convertible Notes against and from any losses, claims,
expenses, damages or liabilities, insofar as such losses, claims, expenses,
damages or liabilities (or actions in respect thereof) arise

                                       32

<PAGE>

out of or are based upon (i) the falsity or incorrectness of any representation
or warranty of the Company contained in or made pursuant to Article 2 hereof or
(ii) the existence of any condition, event or fact constituting, or which with
notice or passage of time, or both, would constitute a default in the observance
of any of the Company's undertakings or covenants hereunder, under the other
Transaction Documents, or pursuant to the Charter. The Company shall also pay
all attorney's and accountant's fees and costs and court costs incurred by any
holder of Convertible Notes in enforcing the indemnification provided for in
this Section (provided, however, that where more than one person is requesting
the indemnification provided for in this Section, the Company shall only be
obligated to attorney's fees of one counsel to represent all such persons).
Notwithstanding the foregoing, the Company expressly agrees and acknowledges
that the right of indemnification granted herein to each holder of Convertible
Notes shall not be deemed to be the exclusive remedy available to such holder
for any of the matters described in this Section.

         SECTION 6.15. DELIVERY OF CERTAIN SIGNATURE PAGES. Concurrently with
the execution of this Agreement, the parties are executing and delivering to
counsel for the Company signature pages to the Registration Rights Agreement,
the Shareholders Agreement, the Convertible Notes and a letter agreement
establishing certain procedures relating to potential acquisitions and asset
sales involving the Company. The parties hereto hereby agree that such signature
pages are being delivered to counsel for the Company for safekeeping pending the
Closing and that neither such agreements and instruments nor any other Closing
documents delivered to counsel for the Company shall have effect prior to the
satisfaction (or the waiver by the party entitled to insist on performance
thereof) of the conditions to the Closing contained in Article 4,
notwithstanding that such agreements and instruments may be dated prior to the
Closing Date.

          [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK]

                                       33

<PAGE>

         IN WITNESS WHEREOF, the Company and the Purchasers have executed this
Agreement as of the day and year first above written.

                                  TOTAL NETWORK SOLUTIONS, INC.

                                  By:
                                     ------------------------------
                                     Name:  Rami Musallam
                                     Title: President

                                  PURCHASER:

                                  CISCO SYSTEMS, INC.

                                  By:
                                     ------------------------------
                                  Name:
                                  Title:
                                  Address:

                                  Fax:

                                       34<PAGE>

                                                                    Exhibit 10.7

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED.
NEITHER THIS NOTE NOR ANY SECURITIES ISSUABLE UPON CONVERSION HEREOF MAY BE
SOLD, TRANSFERRED, ASSIGNED OR HYPOTHECATED UNLESS THERE IS AN EFFECTIVE
REGISTRATION STATEMENT UNDER SUCH ACT COVERING SUCH SECURITIES, THE SALE IS MADE
IN ACCORDANCE WITH RULE 144 UNDER THE ACT, OR THE COMPANY RECEIVES AN OPINION OF
COUNSEL FOR THE HOLDER OF SUCH SECURITIES REASONABLY SATISFACTORY TO THE COMPANY
STATING THAT SUCH SALE, TRANSFER, ASSIGNMENT OR HYPOTHECATION IS EXEMPT FROM THE
REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SUCH ACT.

THE SECURITIES ISSUABLE UPON EXERCISE OF THIS CONVERTIBLE PROMISSORY NOTE ARE
ALSO SUBJECT TO CERTAIN RESTRICTIONS CONTAINED IN A SHAREHOLDERS AGREEMENT, AS
AMENDED, A COPY OF WHICH IS ON FILE AT THE OFFICE OF THE SECRETARY OF THE
COMPANY.

PAYMENTS ON ACCOUNT OF THE INDEBTEDNESS EVIDENCED BY THIS CONVERTIBLE PROMISSORY
NOTE ARE SUBORDINATED AS PROVIDED HEREIN.

                    $3,172,872.24 CONVERTIBLE PROMISSORY NOTE
                    -----------------------------------------

$3,172,872.24                                                  December 21, 1999

                  Total Network Solutions, Inc., a New York corporation (the
"COMPANY"), for value received, promises to pay to Cisco Systems, Inc., a
California corporation (the "HOLDER"), the principal sum of Three Million One
Hundred Seventy-Two Thousand Eight Hundred Seventy-Two Dollars and Twenty-Four
Cents ($3,172,872.24), plus interest on the unpaid balance hereof (the "NOTE").
Interest shall be computed on the basis of a 360-day year and actual number of
days elapsed and shall accrue from and including the date funds are advanced
hereunder at the rate of six point forty seven percent (6.47%) per annum to but
excluding the date of repayment.

                  1. DEFINITIONS. As used in this Note, the following terms
shall have the definitions ascribed to them below:

                           a. "Common Note" shall mean the $4,416,150
Convertible Promissory Note to be issued by the Company to the Holder pursuant
to the Purchase Agreement (as defined below).

                           b. "Conversion Share Price" shall be equal to: (i)
the sum of accrued interest and the principal amount of $3,172,872.24; (ii)
divided by (x) in the case of a conversion into Common Stock, a number equal to
the number of Common Stock into which 1,077,026 shares of Series B Preferred (as
defined below) issued on the date hereof would be convertible pursuant to the
Restated Certificate of Incorporation of the Company (the "Restated
Certificate") (as appropriately adjusted therein for dilution, stock splits,
stock dividends, combinations,

<PAGE>

reclassifications and the like) and (y) in the case of a conversion into Series
B Preferred, 1,077,026.

                           c. "Conversion Stock" shall mean: (1) prior to the
Company consummating an Initial Public Offering (as defined below) shares of the
Company's common stock or Series B Preferred, at the option of the Holder,
purchasable upon conversion of this Note, or (2) subsequent to the Company
consummating an Initial Public Offering, the shares of the Company's common
stock issuable upon conversion of this Note. The total number of shares of
Conversion Stock shall be determined by dividing (A) the amount of the
outstanding principal and accrued interest under this Note which the Holder
elects to convert at the time of conversion by (B) the Conversion Share Price.

                           d. "Highest Lawful Rate" shall mean the maximum
non-usurious rate of interest, as in effect from time to time, which may be
charged, contracted for, reserved, received or collected by the Holder in
connection with this Note under applicable law.

                           e. "Holder" shall mean the person specified in the
introductory paragraph together with its successors and permitted assigns.

                           f. "Initial Public Offering" shall mean the Company's
first firm commitment underwritten offering pursuant to a registration statement
under the Securities and Exchange Act of 1933, as amended, covering the sale of
the Company's common stock with net proceeds to the Company of at least Twenty
Million Dollars ($20,000,000).

                           g. "Letter Agreement" shall mean the Letter
Agreement, dated as of December 21, 1999, by and between the Company and the
Holder.

                           h. "Note" shall mean this $3,172,872.24 Convertible
Promissory Note.

                           i. "Purchase Agreement" shall mean the Convertible
Note Purchase Agreement, dated as of December 21, 1999, by and between the
Company and the Holder.

                           j. "Registration Rights Agreement" shall mean the
Second Amended and Restated Registration Rights Agreement, dated as of December
21, 1999, by and among the Company, Morgan Stanley Venture Investors III, L.P.,
Morgan Stanley Venture Partners III, L.P., The Morgan Stanley Venture Partners
Entrepreneur Fund, L.P., Merritt Lutz and the Holder.

                           k. "Second Convertible Note" shall mean the
$9,000,004.68 Convertible Promissory Note to be issued by the Company to the
Holder pursuant to the Purchase Agreement.

                           l. "Series B Preferred" shall mean shares of the
Company's Series B Preferred Stock.

                           m. "Shareholders Agreement" shall mean the shall mean
the Second Amended and Restated Shareholders Agreement, dated as of December 21,
1999, by and among

                                       2
<PAGE>

the Company, Morgan Stanley Venture Investors III, L.P., Morgan Stanley Venture
Partners III, L.P., The Morgan Stanley Venture Partners Entrepreneur Fund, L.P.,
Merritt Lutz, the Holder and each of the stockholders listed on the signature
pages thereof.

                  2. MATURITY. The principal of this Note shall mature and be
due and payable on December 21, 2009 (the "MATURITY DATE"). All accrued and
unpaid interest shall be due and payable on the earlier of (i) the Maturity Date
or (ii) the maturity of the principal of this Note (whether at scheduled
maturity or upon acceleration of maturity following an Event of Default (as
defined below)), provided that in no event shall any interest be payable prior
to June 30, 2003.

                  3. CONVERSION.

                           A. HOLDER'S OPTION. The unpaid principal and interest
outstanding under this Note shall be convertible at any time or from time to
time, in whole or in part, at the option of the Holder, into Conversion Stock at
the Conversion Price. The Holder will give the Company thirty (30) days' prior
written notice of its intention to effectuate such conversion. No fractional
shares shall be issued and the value of any fractional share shall be paid by
the Company to the Holder in cash. Commencing ninety (90) days prior to the
Maturity Date, if the Note has not been converted by the Holder in accordance
with the terms hereof and the Company wishes to pay the Note, the Company shall
give thirty (30) days' prior written notice to the Holder (the "NOTICE PERIOD").
After the commencement of the Notice Period, the Holder shall have thirty (30)
days thereof to advise the Company whether it will exercise its right to convert
the Note, in whole or in part, into shares of Conversion Stock or whether it
will accept payment or prepayment of the Note, in whole, from the Company. The
Company may not voluntarily pay prior to the Maturity Date any portion of the
Note if the conversion of such portion would result in the Holder acquiring
19.9% or more of the equity ownership of the Company or if the Holder advises
the Company during the Notice Period that such conversion would require the
Holder to undertake the equity method of accounting in connection with its
ownership of the Conversion Stock (the "EQUITY LIMITATION") (it being understood
that the Equity Limitation shall be inapplicable to any payment on this Note on
or after the Maturity Date). Any portion of the Note at any time outstanding
because of the Equity Limitation set forth in the preceding sentence may be
voluntarily paid prior to the Maturity Date only at the option of the Holder.

                           B. CONDITION TO AN ACQUISITION TRANSACTION. If
neither prepayment nor conversion has occurred prior to (i) any reorganization,
merger or consolidation in which the Company is not the surviving entity or (ii)
the sale or transfer by the Company of all or substantially all of its assets
otherwise than to a wholly owned affiliate of the Company, (any such transaction
being an "ACQUISITION TRANSACTION"), unless this Note is paid or converted as
provided in Section 5, as a condition to the consummation of the Acquisition
Transaction, the Note shall be cancelled and the surviving entity or transferee
shall enter into a successor note agreement with the Holder (the "SUCCESSOR
NOTE"). The Successor Note shall provide (i) that the Holder may convert it for
the kind and amount of capital stock or other securities or property which the
Holder would have received immediately after the Acquisition Transaction if the
Holder had converted the Note immediately before the effective date of the
Acquisition Transaction and (ii) that the surviving entity in the Acquisition
Transaction shall succeed to and be substituted to every right and obligation of
the Company in respect of this Note. The

                                       3
<PAGE>

Successor Note shall provide for adjustment which shall be as nearly equivalent
as may be practicable to the adjustments provided for in this Section 3.
Notwithstanding the foregoing, if the Company enters into an Acquisition
Transaction and consideration payable to holders of shares of the Company's
common stock issuable or, deliverable upon conversion of the Note in connection
with such Acquisition Transaction consists solely of cash, then the Holder shall
be entitled to receive distributions on the date of such event on an equal basis
with holders of shares of the Company's common stock issuable upon conversion of
the Note as if the Note had been converted immediately prior to such event and
upon such distribution, the Note shall be cancelled and the Company's
obligations under the Note shall be terminated.

                           C. CONDITIONAL CONVERSION. Subject to Section 3(a),
the Holder may specify that the conversion of the Note, in whole or in part, is
contingent upon and shall occur simultaneously with the consummation of (i) the
acquisition of the Company by another entity by means of any transaction or
series of related transactions (including, without limitation, any
reorganization, merger or consolidation), or (ii) a sale of all or substantially
all of the assets of the Company (including, for purposes of this paragraph,
intellectual property rights which, in the aggregate, constitute substantially
all of the Company's assets).

                  4. MECHANICS AND EFFECT OF CONVERSION. Upon the conversion of
this Note pursuant to Section 3 above, the Holder shall surrender this Note,
duly endorsed, at the principal office of the Company. At its expense, the
Company shall, as soon as practicable thereafter, issue and deliver to such
Holder at such principal office a certificate or certificates for the number of
shares of such Conversion Stock to which the Holder shall be entitled upon such
conversion (bearing such legends as are required by applicable state and federal
securities laws in the opinion of counsel to the Company), together with any
other securities and property to which the Holder is entitled upon such
conversion under the terms of this Note, including a check payable to the Holder
for any cash amounts payable as described above. Upon conversion of this Note,
the Company shall be forever released from all its obligations and liabilities
under this Note.

                  5. PREPAYMENTS. In addition to the Company's right to prepay
the Note pursuant to Section 3, if on or prior to the Maturity Date, the Company
notifies the Holder that it intends to consummate a merger, consolidation,
reorganization or sale of all or substantially all of its assets following which
the holders of the Company's voting securities outstanding prior to such
transaction will not hold more than 50% of the voting securities of the
surviving entity or transferee in such transaction (or an entity controlling
such surviving entity or transferee), the Company may prepay the Note in whole;
PROVIDED, HOWEVER, that the Company shall give the Holder at least thirty (30)
days prior written notice (or such other time as may be remaining if there are
less than 30 days remaining prior to the consummation of such transaction) of
its intent to consummate such transaction and; PROVIDED, FURTHER, that such
prepayment is subject to the Holder's right to convert the Note pursuant to
Section 3(a), and that such prepayment shall occur only upon the consummation of
such transaction. Upon the consummation of such transaction, the Holder shall
surrender the Note, duly endorsed, at the principal office of the Company, and
the Company shall pay the Holder in immediately available Funds the unpaid
principal and interest of the Note.

                                       4
<PAGE>

                  6. USURY. Any scheduled principal payments hereunder, or any
other amounts payable hereunder, not paid within five (5) days from the date due
shall bear interest at a rate of 10% per annum, or the maximum rate permitted by
law, whichever is less. Overdue interest shall be payable on demand. All
computations of interest shall be made on the basis of a year of 360 days for
the actual number of days (including the first day but excluding the last day)
occurring in the period for which such interest is payable. Anything herein to
the contrary notwithstanding, if during any period for which interest is
computed hereunder, the amount of interest computed on the basis provided for in
this Note, together with all fees, charges and other payments which are treated
as interest under applicable law, as provided for herein or in any other
document executed in connection herewith, would exceed the amount of such
interest computed on the basis of the Highest Lawful Rate, the Company shall not
be obligated to pay, and the Holder shall not be entitled to charge, collect,
receive, reserve or take, interest in excess of the Highest Lawful Rate, and
during any such period the interest payable hereunder shall be computed on the
basis of the Highest Lawful Rate.

                  7. EVENTS OF DEFAULT. The entire unpaid principal balance and
accrued interest of this Note shall immediately be due and payable at the option
of the Holder upon the occurrence of any Event of Default. For purposes of this
Note, the Company shall be in default under this Note upon the happening of any
condition or event set forth below (herein called an "EVENT OF DEFAULT"):

                           a. The Company's failure to pay any principal or
accrued interest evidenced hereby within five (5) days after such payment of
principal or interest becomes due in accordance with the terms of this Note;

                           b. The Company's failure to perform, keep or observe
any of its covenants, conditions, promises, agreements or obligations under this
Note, if such failure would have a material adverse effect on the Company's
assets, operations or condition, financial or otherwise and such failure is not
cured by the Company within thirty (30) days (or such longer period as shall be
reasonably necessary to effect such cure if efforts to cure are commenced within
such 30-day period and are pursued with reasonable diligence until completion)
of the date that written notice of such failure is delivered to the Company.

                           c. The institution of proceedings against the
Company, or the Company's filing of a petition or answer or consent seeking
reorganization or release, under the Federal Bankruptcy Code, or the
commencement of any proceeding under any bankruptcy or insolvency laws by or
against the Company which results in the entry of an order for relief or which
remains undismissed, undischarged or unbonded for a period of sixty (60) days or
more, or the Company's consent to the filing of any such petition or the
appointment of a receiver, liquidator, assignee, trustee or other similar
official of the Company or of any substantial part of its property, or the
Company's making of an assignment for the benefit of creditors, or the taking of
corporate action in furtherance of such action;

                           d. Any warranty or representation contained in this
Note, the Letter Agreement, the Common Note, the Second Convertible Note, the
Registration Rights Agreement, the Shareholders Agreement or the Purchase
Agreement proves to have been false in

                                       5
<PAGE>

any material respect when made or furnished and such falsity would have a
material adverse effect on the Company's assets, operations or condition,
financial or otherwise.

                  8. NEGATIVE COVENANTS. For so long as any amounts are
outstanding under this Note and are convertible into shares of Series B
Preferred Stock, the Company shall not, without the consent of the holders of
75% of the principal amount of this Note:

                           a. Redeem, repurchase or pay any dividends on any
Junior Securities (as defined in the Restated Certificate) other than (i)
dividends or distributions paid in shares of, or options, warrants or rights to
subscribe for or purchase shares of, Junior Securities, (ii) a redemption,
purchase or other acquisition of shares of Common Stock made pursuant to an
employee incentive or benefit plan of the Corporation or any subsidiary or the
terms of any grant pursuant thereto that has been approved by the Board of
Directors or other administrator thereof or (iii) pursuant to the Shareholders
Agreement;

                           b. Amend, alter or repeal any provision of, or add
any provision to, the Restated Certificate (including without limitation any
provision of the Restated Certificate fixing and determining the terms of any
series of Preferred Stock, including without limitation the Series B Preferred
Stock, but excluding any Preferred Stock constituting Junior Securities, whether
now or hereafter authorized) or the Company's Bylaws (other than (i) any
increase in the authorized capital of the Company that has been approved by the
Board of Directors and that does not require the vote of the holders of Series B
Preferred Stock pursuant to paragraph D.9(c)(i) or D.9(d)(i) of the Restated
Certificate or (ii) except to the extent the same shall adversely change the
rights, preferences or privileges of the Series B Preferred Stock or the Series
C Preferred Stock (in which event any separate class vote of such series
provided for by law or in the Restated Certificate shall also be required), in
connection with any merger, consolidation, business combination or other
extraordinary corporate transaction following compliance with the Letter
Agreement, to the extent applicable);

                           c. Create or authorize the creation of any additional
class or series of shares of capital stock other than Junior Securities, or
increase the authorized amount of any additional class or series of shares of
capital stock other than Junior Securities, or create or authorize any
obligation or security convertible into shares of any other class or series of
capital stock other than Junior Securities, or issue any additional shares of
any other class or series of capital stock other than Junior Securities (other
than any Additional Shares (as defined in the Restated Certificate)) whether any
such creation, authorization, increase or issuance shall be by means of
amendment to the Restated Certificate or by merger, consolidation or otherwise;

                           d. Consent to any liquidation, dissolution or winding
up of the Corporation (other than a Deemed Liquidation (as defined in the
Restated Certificate) or in connection with a merger, consolidation, business
combination or other extraordinary corporate transaction following compliance
with the Letter Agreement, to the extent applicable);

                           e. Redeem or repurchase any shares of Series A
Preferred Stock prior to June 30, 2003 other than pursuant to paragraph C.3 or
clause (i) of paragraph C.4(b) of Article Fourth of the Restated Certificate;

                                       6
<PAGE>

                           f. Increase the authorized amount of the Series B
Preferred Stock, create or authorize any obligation or security convertible into
shares of Series B Preferred Stock or issue any additional shares of Series B
Preferred Stock (other than Additional Series B Shares (as defined in the
Restated Certificate)); or

                           g. Enter into, or permit any Subsidiary to enter
into, any agreement, indenture or other instrument which contains any provision
restricting the payment of dividends by the Corporation on the Series B
Preferred Stock when due to the full extent required by Article Fourth,
paragraph D.3 of the Restated Certificate, other than any Approved Third Party
Credit Agreement (as defined in the Restated Certificate).

                  9. RESERVATION OF STOCK ISSUABLE UPON CONVERSION. The Company
shall reserve and keep available out of its authorized but unissued shares of
preferred or common stock such number of shares as shall from time to time be
sufficient to effect the conversion of this Note; and, if at any time the number
of authorized but unissued shares of the Company's preferred or common stock
shall not be sufficient to effect the conversion of the entire outstanding
principal amount of this Note, without limitation of such other remedies as
shall be available to the Holder of this Note, the Company will use its best
efforts to take such corporate action as, in the opinion of counsel, may be
necessary to increase its authorized but unissued shares of preferred or common
stock to such number of shares as shall be sufficient for such purposes.

                  10. NOTICES. Any notice required by any provision of this Note
to be given to the Holder shall be in writing or by telegram or facsimile
confirmed answer back, and shall be deemed to have been duly made when delivered
in person or sent by telegram or facsimile confirmed answer back , same day or
overnight courier, or 72 hours after having been deposited in the United States
first class or registered or certified mail return receipt requested, postage
prepaid. All such communications shall be addressed to the Holder of record at
its address appearing on the books of the Company.

                  11. NO RIGHTS AS STOCKHOLDER. Without limitation of Section 8,
this Note, as such, shall not entitle the Holder to any rights as a stockholder
of the Company, except as otherwise specified herein.

                  12. LEGAL FEES. The Company agrees to pay on demand all the
losses, costs, and expenses (including, without limitation, attorneys' fees and
disbursements) which the Holder incurs in connection with enforcement or
attempted enforcement of this Note, or the protection or preservation of the
Holder's rights under this Note, whether by judicial proceedings or otherwise.
Such costs and expenses include, without limitation, those incurred in
connection with any workout or refinancing, or any bankruptcy, insolvency,
liquidation or similar proceedings.

                  13. HEADINGS. The headings in this Note are inserted for
convenience only and do not constitute a part of this Note.

                  14. GOVERNING LAW. This Note shall be governed by the laws of
the State of New York, without giving effect to conflicts of law principles.

                                       7
<PAGE>

                  15. ASSIGNMENT. This Note shall be binding on the Company and
its successors and permitted assigns, and shall be binding upon and inure to the
benefit of the Holder, any future holder of this Note and their respective
successors and permitted assigns. Neither the Company nor the Holder may assign
or transfer this Note or any of its rights or obligations hereunder (other than
by operation of law) without the other party's prior written consent; PROVIDED,
HOWEVER, that the Holder may transfer this Note and any of its rights and
obligations hereunder to a majority-owned affiliate thereof. Any transferee of
this Note shall become a party to the Shareholders Agreement in accordance with
the terms thereof.

                  16. WAIVER. The Company hereby waives notice of default,
presentment or demand for payment, protest or notice of nonpayment or dishonor
and all other notices or demands relative to this Note. No single or partial
exercise of any power under this Note shall preclude any other or further
exercise of such power or exercise of any other power. No delay or omission on
the part of the Holder in exercising any right under this Note shall operate as
a waiver of such right or any other right hereunder.

                  17. SEVERABILITY. In the event any one or more of the
provisions contained in this Note shall for any reason be held to be invalid,
illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision hereof, and this Note
shall be construed as if such invalid, illegal or unenforceable provision had
never been contained herein.

                  18. SUBORDINATION. By accepting this Note, the Holder agrees
that all payments on account of the indebtedness, liabilities and other
obligations of the Company to the Holder of this Note, including, without
limitation, all amounts of principal, all interest accrued hereon, and all other
amounts payable by the Company to the Holder under this Note or in connection
herewith (the "Subordinated Indebtedness") shall be subordinate and subject in
right of payment, to the extent and in the manner set forth herein, to the prior
payment in full in cash or cash equivalents of the Senior Indebtedness. As used
herein, "Senior Indebtedness" shall mean (i) any indebtedness, liabilities and
other obligations of the Company (whether as primary obligor or as guarantor) to
any person (each a "Senior Lender") with respect to (a) any working capital,
revolving credit or other line of credit facility, any term loan facility, or
any other extension of credit by any individual or entity (whether or not
secured), including reimbursement obligations under letters of credit or
guaranties and (b) obligations in respect of bankers' acceptances purchased by,
and interest rate protection agreements and currency exchange and purchase
agreements entered into with, any individual or entity, (ii) any such types of
indebtedness which are incurred by any affiliate of the Company, (iii) all other
amounts due on or in connection with such Senior Indebtedness, including all
charges, fees, indemnities and expenses (including reasonable fees and expenses
of counsel), (iv) all interest accruing with respect to such Senior Indebtedness
during the pendency of a bankruptcy or insolvency proceeding, whether or not
allowable thereunder, and (v) all extensions, renewals, refinancings and
deferrals of the amounts referred to in clauses (i) through (iv) above. The
terms "indebtedness," "liabilities" and "obligations" are used herein in their
most comprehensive sense and include any and all advances, debts, obligations
and liabilities, now existing or hereafter arising, whether voluntary or
involuntary and whether due or not due, absolute or contingent, liquidated or
unliquidated, determined or undetermined.

                                       8
<PAGE>

                  As long as any of the Senior Indebtedness shall remain
outstanding and unpaid, the Holder shall not accept or receive, directly or
indirectly, and the Company shall not make, any Subordinated Debt Payment (as
defined below), except that prior to the occurrence of any Senior Lender Default
(as defined below) and receipt of the notice from the Senior Lender described
below, the Holder shall be entitled to accept and receive payments of principal
and interest under this Note, in accordance with the terms of this Note. Upon
the occurrence of any Senior Lender Default (or if any Senior Lender Default
would exist immediately after the making of a Subordinated Debt Payment), and
upon receipt by the Company and the Holder of notice in writing of such Senior
Lender Default, and until such Senior Lender Default is cured or waived, the
Company shall not make, and the Holder shall not accept or receive, any
Subordinated Debt Payment. In the event that, notwithstanding the foregoing
provisions, any Subordinated Debt Payments shall be received in contravention
hereof by the Holder before all Senior Indebtedness shall be paid, such
Subordinated Debt Payments shall be held in trust for the benefit of the Senior
Lenders and shall be paid over or delivered to the Senior Lenders for
application to the payment in full in cash or cash equivalents of all Senior
Indebtedness remaining unpaid to the extent necessary to give effect hereto,
after giving effect to any concurrent payments or distributions to any Senior
Lender in respect of the Senior Indebtedness. As used herein, "Senior Lender
Default" means any default in respect of any Senior Indebtedness, or any other
default specified in the agreement or instrument under which any Senior
Indebtedness is issued, continuing beyond the grace period, if any, specified in
any such agreement or instrument; and "Subordinated Debt Payment" means any
payment or distribution by or on behalf of the Company, directly or indirectly,
of assets of the Company or any person or entity with a right of reimbursement
against the Company of any kind or character, whether in cash, property or
securities, including on account of the purchase, redemption or other
acquisition of Subordinated Indebtedness, or by setoff, exchange or in any other
manner, for or on account of the Subordinated Indebtedness.

                  If, while any Subordinated Indebtedness is outstanding, any
bankruptcy, insolvency, reorganization, receivership, arrangement, marshalling
of assets and liabilities or similar proceeding is commenced by or against the
Company or its property, the Holder shall promptly take such action as any
Senior Lender may reasonably request (A) to collect the Subordinated
Indebtedness for the account of the Senior Lenders and to file appropriate
claims or proofs of claim in respect of the Subordinated Indebtedness, (B) to
execute and deliver to the Senior Lenders, such powers of attorney, assignments
and other instruments as they may request to enable them to enforce any and all
claims with respect to the Subordinated Indebtedness (to the extent and in the
manner provided herein), and (C) to collect and receive any and all payments or
distributions which may be payable or deliverable upon or with respect to the
Subordinated Indebtedness for the account of the Senior Lenders.

                  In the event of any payment or distribution of assets of the
Company of any kind or character, whether in cash, property or securities, upon
the dissolution, winding up or total or partial liquidation or reorganization,
readjustment, arrangement or similar proceeding relating to the Company or its
property, whether voluntary or involuntary or in bankruptcy, insolvency,
receivership, arrangement or similar proceedings or upon an assignment for the
benefit of creditors, or upon any other marshalling or composition of the assets
and liabilities of the Company, or otherwise: (i) all amounts owing on account
of the Senior Indebtedness shall first be paid in full in cash, or payment
provided for in cash or in cash equivalents, before any

                                       9
<PAGE>

Subordinated Debt Payment is made; and (ii) to the extent permitted by
applicable law, any Subordinated Debt Payment to which the Holder would be
entitled except for the provisions hereof, shall be paid or delivered by the
trustee in bankruptcy, receiver, assignee for the benefit of creditors or other
liquidating agent making such payment or distribution directly to the Senior
Lenders for application to the payment of the Senior Indebtedness in accordance
with clause (i) above, after giving effect to any concurrent payment or
distribution or provision therefor to the Senior Lenders in respect of such
Senior Indebtedness.

                  If an Event of Default under Section 7 shall occur and be
continuing, the Holder shall, at least twenty (20) days prior to accelerating,
and as a condition to the effectiveness of any acceleration of, this Note, send
a written notice of such acceleration designated as a "Notice of Intent to
Accelerate" to all holders of Senior Indebtedness that have been identified as
such by the Company (or by any such holder of Senior Indebtedness).

                  The subordination provisions of this Note are intended solely
for the purpose of defining the relative rights against the Company of the
Holder, on the one hand, and the Senior Lenders, on the other hand. Nothing
contained herein shall (i) impair, as between the Company and the Holder, the
obligation of the Company to pay the principal of or interest on this Note and
its other obligations with respect to the Subordinated Indebtedness as and when
the same shall become due and payable in accordance with the terms thereof, or
(ii) otherwise affect the relative rights against the Company of the Holder, on
the one hand, and the creditors of the Company (other than the Senior Lenders),
on the other hand.

                  Until the payment and performance in full of all Senior
Indebtedness, the Holder shall not have, and shall not directly or indirectly
exercise, any rights that it may acquire by way of subrogation under this Note,
by any payment or distribution to the Senior Lenders hereunder or otherwise.
Upon the payment and performance in full of all Senior Indebtedness, the Holder
shall be subrogated to the rights of the Senior Lenders to receive payments or
distributions applicable to the Senior Indebtedness until the Subordinated
Indebtedness shall be paid in full. For the purposes of the foregoing
subrogation, no payments or distributions to the Senior Lenders of any cash,
property or securities to which the Holder would be entitled except for the
provisions of this Note shall, as among the Company, its creditors (other than
the Senior Lenders and the Holder), be deemed to be a payment by the Company to
or on account of the Senior Indebtedness.

                  Each Holder of this Note shall, upon request by the Company,
enter into an intercreditor agreement reflecting the foregoing provisions of
this Section 18 and other customary provisions reasonably acceptable to such
Holder implementing the foregoing provisions of this Section 18.

                            [signature page follows]

                                       10
<PAGE>

                  IN WITNESS WHEREOF, the Company has duly caused this
$3,172,872.24 Convertible Promissory Note to be signed in its names and on its
behalf by its duly authorized officers as of the date first above written.

           TOTAL NETWORK SOLUTIONS, INC.

           By:________________________________________________________
               Name:______________________________________________
               Title:_____________________________________________

           ACCEPTED AND AGREED:

           CISCO SYSTEMS, INC.

           By:________________________________________________________
               Name:______________________________________________
               Title:_____________________________________________

          [signature page - $3,172,872.24 Convertible Promissory Note]

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