How to configure point to point protocol on backtrack

I was watching a redhat Linux tutorial and came across how to use point to point protocol for connecting to the internet with a modem.The video was not really detailed about how to go about this so please can someone help me on how to configure point to point protocol for connecting to the internet with a modem on backtrack.:confused:

Before posting here mate, i think you should solve it first by yourself using search engines like google so that you will have enough information you want to. And if really you can't find information, then you post it here.
I know you can figure it out.