Found this out there on Google. I hope it works because I will be trying it soon.
Found this at http://sclug.usc.edu/pipermail/usclug-c ... 02393.html
Looks as though this is a package called Roaring Penguin. If you have a router that your modem connects to it may not be needed, but if you connect your modem direct to the system, you need to use a pppoe client.
May be one in the repositories, but I haven't had to look for it yet.
Install the rp-pppoe package, run 'adsl-setup', answer the questions,
run 'adsl-start' and 'adsl-stop' to start/stop the link.