Au CAL21 USB Network (CDC/NCM Ethernet) Drivers (WDM) Driver

The Au CAL21 USB Network (CDC/NCM Ethernet) Drivers (WDM) driver helps Windows communicate with the device’s USB network interface so it can function as a network adapter. Provided by Mcci, it is intended for users who need to set up USB networking or resolve a missing or unrecognized network interface on a compatible Windows PC.

Key Features

• USB network interface support: Enables communication with the Au CAL21 CDC/NCM Ethernet interface over USB.
• Windows driver integration: Uses the Windows Driver Model (WDM) to connect the supported hardware with the operating system’s networking components.
• Support for listed Windows releases: Available compatibility information covers Windows 10, 8.1, 7, Vista, and XP; check the individual package for your exact version and architecture.
• Driver setup and replacement: Can help address a missing or incorrectly installed driver when the package matches the connected device.

How to Install Au CAL21 USB Network (CDC/NCM Ethernet) Drivers (WDM) Driver

1. Check your Windows version and whether it is 32-bit or 64-bit. In Device Manager, inspect the device’s hardware IDs to confirm that the package supports your USB network interface.
2. Choose the matching Au CAL21 USB Network (CDC/NCM Ethernet) Drivers (WDM) driver download for Windows. Before selecting a free download, verify its source, compatibility details, and any available digital signature.
3. Extract the downloaded archive if necessary. If a setup program is included, run it and follow its instructions, including any guidance on when to connect the device.
4. If no installer is provided, open Device Manager, locate the affected device, and choose Update driver or the equivalent option. Browse to the extracted driver folder and let Windows search for a matching driver.
5. Restart your PC if prompted, reconnect the device, and check that its network interface appears without a warning icon. USB networking may also need to be enabled on the connected device.

Keep the driver updated when a compatible release addresses a problem you encounter. The latest version should match both your hardware and operating system—not simply have a higher version number. For Windows 10/11 systems, note that Windows 10 is listed as supported, while Windows 11 compatibility is not confirmed here. Before you install an update, keep a copy of the working package so you can restore it if needed.