Sometimes the driver installs, but PuTTY is configured to use the wrong COM port number. Check Device Manager to find the correct number and update your terminal emulator settings accordingly.
If the connection isn't recognized, check Windows Device Manager under Ports (COM & LPT) . If you see a yellow exclamation mark, right-click and select Update Driver , then manually point it to the extracted folder from the .zip file.
# Extract the driver package unzip asr9xxusbconsoledrivers.zip -d asr9xx_drivers cd asr9xx_drivers/Linux asr9xxusbconsoledriverszip upd
Administrators frequently encounter "driver not found" or "connection refused" errors when the wrong port or cable is used. Cable Types
Double-check you're connecting to the correct port on the router. Some ASR 9000 models have multiple USB ports (one for console, one for bootable USB drives). The "USB Console" port is typically marked as such and is often a USB Type-A port. It may be the one on the right-hand side of the front panel. Sometimes the driver installs, but PuTTY is configured
Ensure both the RJ-45 console port and the USB console port are not plugged in simultaneously. On many ASR models, the USB port takes precedence, but having cables in both can cause conflicts. Press Enter a few times to wake up the prompt.
This indicates a driver mismatch. Right-click the device, select Update Driver , choose Browse my computer , and point it directly to the extracted folder containing the .inf files from your ZIP archive. If you see a yellow exclamation mark, right-click
Connecting to a router via its USB console port requires the specific asr-9xx_usbconsole_drivers.zip package to be installed on your Windows PC. This driver allows your computer to recognize the router's USB port as a virtual COM port for terminal emulation. Download & Installation Process
Follow the on-screen prompts. The standard installation steps are as follows: