You're right - it is very difficult to find any info on that modem.. Here's a post I found on usenet that may be helpful. FWIW.
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In article <8mhaht$ksm$1@nnrp1.deja.com>, <canad@my-deja.com> wrote:
> I tried to learn more about my modem. I opened the case and looked
>at the modem. Its written on the chip that it is a ROCKWELL MODEM ,
>MODEL: FB WS-3314JS
>FCC ID: l40WS-3314JS
Your modem is sold under the names:
Wisecom WS-3314JS3 www.wisecominc.com
Harmony HM18013-3 www.harmonyusa.com
It has been shown to work under Linux, and once you figure out the DIP
switch settings, it will be easy.
http://www.cisusa.com/jump.html
> About jumpers! I don't know if they are jumpers , but there are
>switches on the back of the modem card ( just near the line-phone plug
>in) , which were numbered from 1 to 6. It shows that "ON" is down , and
>only 2 and 4th were switched down.(which means i think only these two
>are ON). The other four ( 1 , 3 , 5 , and 6 ) are switched up.
Looks like COM2, IRQ3: a standard setting
So in Linux,
ln -s /dev/ttyS1 /dev/modem
Your modem is on /dev/modem, which is now symbolically linked to
/dev/ttyS1 (COM2). Now you can test your modem using minicom. See the
Modem-HOWTO at
http://linuxdoc.org/HOWTO for details.
<i>It's always the one thing you never suspected.</i>