<PAGE>   1
                                                                   EXHIBIT 10.01

                                MASTER AGREEMENT

         This Master Agreement (the "Agreement") is made and entered into as of
this 18th day of February, 2000 (the "Effective Date"), by and between Summus,
Ltd., a Delaware corporation ("Summus"), and High Speed Net Solutions, Inc., a
Florida corporation ("HSNS"):

         1.       Summus and HSNS have previously entered into a Marketing
                  License Agreement ("MLA") dated in February of 1999 and
                  certain Related Agreements. "Related Agreements" means
                  agreements between Summus and HSNS related to or incorporated
                  by the MLA and agreements based on either Summus' or HSNS's
                  rights and obligations under the MLA, including, but not
                  limited to, the Letter Agreement incorporated by the MLA and
                  any agreements relating to or arising from opportunities to
                  sell or license products or services to Samsung.

         2.       The MLA contemplated that HSNS will act as a reseller of
                  Summus products. The parties have concluded that it would be
                  to their mutual benefit, instead, for HSNS to primarily use
                  Summus products and services to conduct a service bureau
                  business and for HSNS and Summus to share revenues derived
                  from each party's business activity with Summus' products. As
                  a service bureau, HSNS will not act as a reseller of Summus'
                  products.

         3.       In order to enable the proposed service bureau business of
                  HSNS and proposed revenue sharing between the parties, Summus
                  and HSNS hereby agree to enter into the Software License
                  Agreement, Software Maintenance Agreement, and Revenue Sharing
                  Agreement attached to this Agreement as Exhibits A, B, and C
                  respectively (collectively, the "New Agreements"). Terms not
                  otherwise defined herein shall have the meanings specified in
                  the New Agreements.

         4.       Upon execution of the New Agreements, the MLA and the Related
                  Agreements shall terminate and have no further force or
                  effect. Neither party shall have any obligation of further
                  performance under the MLA or the Related Agreements.

         5.       "License Fee Credit" - shall mean the amount of One Million
                  Dollars ($1,000,000) as a one-time credit granted Customer by
                  Licensor in recognition of payments made under the MLA. The
                  License Fee Credit shall be applied against license fees due
                  under the Software License Agreement.

         6.       "Revenue Based Fee Credit" - shall mean the amount of One
                  Million Dollars ($1,000,000) as a one-time credit granted the
                  Customer by Licensor in recognition of payments made under the
                  MLA. The Revenue Based Fee Credit shall be applied against
                  Revenue Based Fee payments due from Customer to Licensor under
                  the Software License Agreement.

<PAGE>   2

         7.       "Annual Maintenance Fee Credit" - shall mean the amount of One
                  Hundred Fifty Thousand Dollars ($150,000) as a one-time credit
                  granted to the Customer by Licensor in recognition of payments
                  made under the MLA. The Annual Maintenance Fee Credit may be
                  applied against payments due from Customer to Licensor under
                  the Software Maintenance Agreement.

         8.       "Customer Credit" - shall mean any amounts to be paid to the
                  Customer by the Licensor as a result of the Revenue Sharing
                  Agreement, Exhibit C, in excess of amounts to be paid to the
                  Licensor by the Customer as a result of the Revenue Fee in the
                  Software License Agreement, Exhibit A. Such Customer Credit
                  may be used at the discretion of the Customer to pay any
                  charges due to Licensor in connection with the New Agreements.

         9.       Any portion of the Customer Credit that is not credited
                  against payments due to Licensor shall be available to
                  Customer to be applied against purchase of other products
                  and/or services of Licensor. In the event that the Software
                  License Agreement is terminated by Customer for material
                  failure of Licensor to deliver (including the cure period of
                  60 days) the products as described in Exhibit A.1, the License
                  Fee Credit, Revenue Based Fee Credit, and Annual Maintenance
                  Fee Credit shall increase by 1.5% per month for up to twelve
                  (12) months or until such time as Customer selects other
                  products and/or services of Licensor to be paid through the
                  application of the Credit, whichever occurs first. Customer
                  and Licensor shall cooperate to select such other products or
                  services of Licensor promptly in order to apply the credits
                  without undue delay, but Customer shall not be required to
                  apply the credits against products and/or services that are
                  not needed or useful in Customer's business.

         10.      Licensor will provide to Customer additional resource support
                  through provision of ancillary services, in an approximate
                  fair market value of Two Hundred Fifty Thousand Dollars
                  ($250,000). The ancillary services may consist of, at the
                  discretion of Licensor, cash payments, credits against charges
                  due for services under the New Agreements, computer hardware,
                  third party software licenses, or other services requested by
                  Customer. Licensor shall provide the ancillary services
                  reasonably requested by Customer in prompt commercial fashion.
                  The total value of all ancillary services provided, whether
                  delivered in cash, services, or products, shall be deemed to
                  be an advance amount to be offset by payments due Customer
                  from Licensor under the Revenue Sharing Agreement and shall be
                  accounted for without interest or any other charges
                  whatsoever. To the extent any Customer Credit amounts are
                  available, Customer may at its sole discretion apply such
                  amounts to reduce the ancillary service advance amount total.

         11.      This Agreement shall be construed and enforced in accordance
                  with the laws of the State of North Carolina, but without
                  giving effect to its laws or rules relating to conflicts of
                  laws. In the event of any dispute or controversy arising under
                  or in connection with this Agreement or any New Agreement, the
                  dispute resolution procedures set forth in Exhibit A shall be
                  followed

<PAGE>   3

         12.      Any dispute or controversy arising under or in connection with
                  this Agreement shall be settled in Wake County, North
                  Carolina. The parties hereby generally submit to the in
                  personam jurisdiction of the Superior Court of the State of
                  North Carolina and the Federal District Court for the Eastern
                  District of North Carolina located in Wake County.

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

         14.      This Agreement and the New Agreements contain the full
                  understanding of the parties and supersede all prior or
                  contemporaneous agreements and understandings, written or
                  oral, between the parties with respect to the subject matter
                  of this Agreement; and there are no representations,
                  warranties, agreements or understandings other than those
                  expressly contained herein. No alteration, modification,
                  variation or waiver of this Agreement, or any of the
                  provisions hereof shall be effective unless executed by both
                  parties in writing.

SUMMUS, LTD.                                     HIGH SPEED NET SOLUTIONS, INC.
By: /s/ Dr. Bjorn Jawerth                        By:   /s/ Andrew L. Fox
(Signature)                                              (Signature)
Date: March 13, 2000                             Date:  February 18, 2000
Name: Dr. Bjorn Jawerth                          Name:  Andrew L. Fox
Title: CEO                                       Title: Acting President and
                                                        CEO, Executive Vice
                                                        President
<PAGE>   4

                                    EXHIBIT A
                           SOFTWARE LICENSE AGREEMENT
<PAGE>   5

                                    EXHIBIT B
                         SOFTWARE MAINTENANCE AGREEMENT
<PAGE>   6

                                    EXHIBIT C
                            REVENUE SHARING AGREEMENT