ewbie internet issues WEST TELL modem DSL to Ubuntu

Im very new to Linux and Ubuntu ,im trying to get his internet working on a hand me down DELL with Ubuntu fully installed. He has already contracted with at&t internet thinking it was going to be a breezy task but the installation disk is only for windows OS. I do know this is possible with out any software but im not to experienced with Ubuntu or networking. I would appreciated if i can get some detailed help files or links on how to accomplish this on a beginner level.

ewbie internet issues WEST TELL modem DSL to Ubuntu

Have you tried searching this site for help yet?
http://www.ubuntu.com/
Your post did not make any sense to me. Try editing it and explain in details what you want to do and what you have done so far!
Linux will do most anything you tell it to do computer wise but it must be understood and instructed...
If Ubuntu was already installed it should have been set up to connect. If you need to install Ubuntu you'll be allowed to set up networking during the install and tweak it afterwords in the menus. Linux is not Windows and Windows is not Linux. They accomplish many of the same things but function very differently.