1 SUPPLEMENT TO AGREEMENT BY AND BETWEEN HIGH SPEED NET SOLUTIONS, INC. AND WILLIAM DUNAVANT WHEREAS, on or about January 15, 1999, the parties entered into an oral agreement (the "Oral Agreement") for the exchange of common stock of High Speed Net...

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                     SUPPLEMENT TO AGREEMENT BY AND BETWEEN
               HIGH SPEED NET SOLUTIONS, INC. AND XXXXXXX XXXXXXXX


         WHEREAS, on or about January 15, 1999, the parties entered into an oral
agreement (the "Oral Agreement") for the exchange of common stock of High Speed
Net Solutions, Inc. for common stock of Summus Technologies, Inc.; and

         WHEREAS, the parties have just now memorialized the Oral Agreement in
writing by a written agreement (the "Written Agreement") dated and effective
August 13, 1999 by and between the parties.

         NOW THEREFORE, it is agreed as follows:

1.       The actual effective date for the Written Agreement shall be January
         15, 1999.

                                    HIGH SPEED NET SOLUTIONS, INC.



/s/ Xxxxxxx X. Xxxxxxxx             By: /s/ Xxxxxxx X. Xxxxxx
-----------------------------          -----------------------------------------
Xxxxxxx X. Xxxxxxxx                    Xxxxxxx Xxxxxx, Chairman of the Board