Well, I'm a definite newbie, but this was my first test and I achieved it.
So here's what I did.
First off go here - http://linmodems.technion.ac.il/#scanModem
and down load scanModem on another computer (and yes I know what a pain that is!).
Then move it to your home folder on your Mint Linux machine with a USB stick, or whatever.
Right click on the file and select 'Open with Archive Manager'
Then select 'Extract'
Once you have extracted the file then right click on it to 'Open' and select 'Run in Terminal'.
This will analyse your Win Modem and put a new folder called 'Modem' whereever you ran it.
Inside that is a file called 'ModemData.txt'. In my case, this told me precisely which driver to download and install. Hopefully it will do the same for you - but if not, there are instructions in that folder about what to do next.
Finally, to all those gurus who think this should be done completely in the Terminal - coming straight from a Windows environment I took the easy root first.
The next stage requires some very simple coding so it's the first step on that 'learning curve'