The modem is a Best Data. It says on the box that it is controller based and works with DOS and Linux and will run on a 486, so it sounds like a true hardware modem.
Of course most modern mobos no longer have an ISA slot, but some do, including my Epox EP-8KTA3+.
Of course most modern mobos no longer have an ISA slot, but some do, including my Epox EP-8KTA3+.