Windows often blocks older Prolific chips. You may need to manually select an older driver version (e.g., version 3.2.0.0 from 2008) in Device Manager using "Browse my computer for drivers" > "Let me pick from a list".
If you are a network engineer, IT professional, or hobbyist trying to connect to a Cisco router, switch, or firewall, you might be using a marked with "AWM 20251" or "AWM 20251 80C 30V VW-1" .
The "AWM 20251" marking found on console cables refers to the standard (specifically UL AWM 20251), dictating the physical voltage and temperature ratings of the cable shielding. It is not a model number or a brand. awm 20251 console cable driver download fix
Ignore them. All legitimate drivers are free from the chip manufacturer (Prolific, FTDI, WCH, Silicon Labs).
Click to apply. The yellow exclamation mark should instantly disappear, replaced by a functional COM port assignment (e.g., COM3 ). Step 4: Verify the Connection in PuTTY or SecureCRT Windows often blocks older Prolific chips
You will find this cable used in networking as a console cable for Cisco, Aruba, Juniper, and other enterprise network switches/routers, as well as in telephone systems (RJ12/RJ11).
Type your exact COM port number into the settings and hit connect. The "AWM 20251" marking found on console cables
If you are experiencing issues with the AWM 20251 console cable driver, here are some common fixes:
If you see "This device cannot start (Code 10)" on a Prolific-based cable under Windows 11, you likely have a generic or counterfeit chip. Windows blocks these with newer updates.