UbuDSL is a tool that helps users to configure their ADSL modem and connection under Ubuntu (and most of Ubuntu-based) distributions. It supports USB ADSL modems working under the following drivers: ueagle-atm, speedtch, cxacru, unicorn II.
Install UbuDSL in ubuntu
First you need to download .deb package from here once you have .deb package install this by double clicking on it or by using the following command
sudo dpkg -i ubudsl_126.96.36.199-7_debian_testing_i386.deb