If you're troubleshooting, try loading the dm9601 module on Linux or installing the LevelOne USB-0401 driver on Windows. This adapter is often used in older embedded systems, industrial PCs, or as a backup network interface.
Because this is a common generic chipset, most modern operating systems handle it with "plug-and-play" drivers: usb vid-0fe6 amp-pid-9900
Here is a complete guide to identifying, finding drivers, and troubleshooting this device. If you're troubleshooting, try loading the dm9601 module
Registered to ICS Advent or Corechip for various networking components. If you're troubleshooting