go to
www.linmodems.org
Lucent winmodems work well with this driver, not sure about your's though.
you will want to get something like this
ltmodem-8.26a9.tar.gz
or an rpm file for Mandrake if it exists. have a look at
http://rpm.pbone.net/
and type
ltmodem-8.26a9*.rpm
in the search box and select Mandrake 9.X and the "new ftp search" option
did it just then and got two results