It was the U.S. Robotics 56k PCI Winmodem that Dell was selling with their "Dimension XPS" Pentium II desktops. I later bought a proper 56k PCI modem off of a high school classmate so that I could download Debian packages without having to reboot into Windows first.
Funny coincidence -- my wife has just gotten me to start following Legend of the Galactic Heroes. I'm reading the light novels (not much time for speed-running 45 hours of anime), and I also picked up the Vampire Hunter D novels.
She's said that there are a few active Discord communities for Legend of the Galactic Heroes. Are you aware of anything on the Fediverse?