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>
         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>

         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>

                                    EXHIBIT A

                           SOFTWARE LICENSE AGREEMENT


<PAGE>


                                    EXHIBIT B

                         SOFTWARE MAINTENANCE AGREEMENT


<PAGE>


                                    EXHIBIT C

                            REVENUE SHARING AGREEMENT