help to install dlink analog usb modem !!

I have a dlink analog usb modem, & don’t know how use it in linux (i am a newbe)

Plz Help

Sorry

i have a Big Mistake

my Modem Type is USR5633 56K USB
& in official site haven’t any driver for linux

if i must have driver for working usb modem under linux ?
and if yes, where can find it !?

PLZ HELP MEEEEEEEEEE