The AWM 20251 is a high-quality cable style often used for Cisco USB console cables and standard telephone/serial connections. In 2025, keeping your driver updated ensures full compatibility with modern operating systems like Windows 11 and macOS, fixing common issues like unresponsive COM ports or device recognition errors. Key Driver Update Features for 2025 USB Console Cable Windows 11 connection to IR1101 router

  • Note: If you see a yellow triangle, you have a driver issue. If you see "USB-Serial Controller D" under "Other Devices," you have no driver installed.

designation refers to a universal Underwriters Laboratories (UL) specification for the physical wiring—specifically silver satin telephone cable

How to Update the Driver

Download the latest installer (typically version 4.0.8 or newer) from the Prolific Support Website

3. How to Fix/Install

Option A: For Prolific Chipset (Most Common)

To make the cable work, you must install an older driver, not the newest one.

  1. Download the driver and extract it.
  2. Go back to Device Manager. Right-click your computer name at the top and select Scan for hardware changes.
  3. The cable will appear as an "Unknown Device" or under "Other Devices."
  4. Right-click it -> Update driver.
  5. Select "Browse my computer for drivers".
  6. Select "Let me pick from a list of available drivers on my computer".
  7. Click Have Disk -> Browse -> Point to the folder containing the older driver files (usually an .inf file).
  8. Select the device and click Next.

2. Release Notes (Technical)

Driver Version: 2.1.4 (March 2025)

Hardware ID: USB\VID_067B&PID_2303
Chipset: Prolific PL2303 (authentic)