Download and run scanmodem, it will tell you which driver to use...
It will tell you what to try.
If this winmodem cannot work at all with linux it will tell you.
I assume you know how to untar tar.gz file, if not let us know.
The file is small and should fit on a floppy
If you really cannot understand the main file created by scanmodem past it here.
This is an automated tools with all the things to try.
Including using wvdial instead of kppp because error messages are clearer.
There should be a readme file with scanmodem
I am not being akward, this is the best way to find out all the information
in one go rather than doing steps by steps in the dark.
It is also better you learn from that reading included with scanmodem.
I know it is difficult at first.
If you remain stuck people will help
I cannot see your modem at http://start.at/modem
Can you post (two v not w) for the modem