Issue 1: "Device Descriptor Request Failed" or Unknown Device Error
Open Device Manager, right-click your network adapter, and go to Properties . Under the Advanced tab, look for Speed & Duplex . Change it from Auto Negotiation to 100 Mbps Full Duplex . Also, ensure it is plugged into a functional USB 2.0 or USB 3.0 port, avoiding unpowered USB hubs. 3. Frequent Disconnections
These adapters are common white-label devices that typically use the RD9700 chipset
Download the driver ZIP or CAB file and extract it to a dedicated folder on your desktop. jp1081b usb lan driver
Search the catalog using your Hardware ID (e.g., "SR9700" or "VID_0FE6") to download safe, digitally signed cabinet (.cab) driver files directly from Microsoft.
# Check if detected lsusb # Look for "IC Plus" or similar
| Problem | Possible Fix | |---------|---------------| | No network after plug‑in | Try a different USB port (avoid USB hub). | | Code 10 / Code 43 (Windows) | Uninstall driver, reinstall using SR9900 driver. | | Linux not recognizing | Check dmesg -w while plugging; ensure usbnet module is loaded. | | Works only at 10 Mbps | Bad USB cable or adapter hardware limitation – try another USB 2.0 port. | Issue 1: "Device Descriptor Request Failed" or Unknown
The "driver" is the critical software component that acts as a translator, allowing your computer's operating system to communicate with the hardware of the adapter. Without the correct driver, the JP1081B is essentially a piece of inert plastic and metal.
Look for a device with a yellow warning triangle labeled USB 2.0 10/100M Ethernet Adapter , CoreChip , SR9700 , or RD9700 .
A critical piece of information for technicians is that the JP1081B is often an affordable clone or variant of well-known controller chipsets, primarily the or the Asix AX88772 / Corechip SR9900 families. If you open your system's Device Manager, the hardware ID for a JP1081B adapter often reflects these core architectures: USB\VID_0FE6&PID_9700 (Corechip / DM9601 / SR9900 variant) USB\VID_0BDA&PID_8152 (Realtek RTL8152 variant) Supported Operating Systems Also, ensure it is plugged into a functional USB 2
Select Browse my computer for drivers , navigate to your extracted driver folder, and click Next . 2. Technical Specifications Interface USB 2.0 (Compatible with USB 1.1) Connector RJ-45 (Female) to USB-A (Male) Max Speed 10/100 Mbps (Fast Ethernet) Chipset Typically Corechip RD9700 or DM9601 Hardware ID USB\VID_0FE6&PID_9700 3. Troubleshooting Common Issues
Click the in the top-left corner and select About This Mac (or System Settings > General > About ). Scroll down and click System Report . Under the Hardware section on the left sidebar, select USB .
If you’ve picked up one of those budget-friendly (often labeled as
Right-click the device and click Update driver . Browse Manually: Choose Browse my computer for drivers .