ADSL
ADSL is a system which is for ISDN. It reduces the size of files to theyr minimum and allows to use ISDN as much as 125 times faster then it would be without ADSL. (files>ADSL>small files>input ISDN>ISDN output>small files>ADSL>files>Server's System>new files>ADSL>small new files>ISDN...)
