use following steps
wget -c http://linmodems.technion.ac.il/packages/scanModem.gz
gunzip -c scanModem.gz > scanModem
chmod +x scanModem
sudo ./scanModem
gedit Modem/ModemData.txt
read the above ModemData.txt file and check www.linmodems.org
or www.linaxant.com for ur modem driver.
it is iteresting, now u can browse internet in linux and it is always safe from the viruses.