I'm not sure if you can load drivers while in Knoppix, I thought Knoppix was designed as more of a Linux Demo tool.
If you can though, I think that this site might help you:
http://linmodems.org/
Contains information for drivers and such on making 'Winmodems' work on Linux.
Goodluck!
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<code>Shakie<br>Smodministrator<br>
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Dial-up for Linux 
Linear Mode
