Modern laptops rarely have built-in RS-232 serial ports. The USB console port on Cisco ASR routers provides a direct way to connect via a standard USB cable, but the computer needs the driver to "translate" that USB connection into a virtual Where to Find the Drivers

: Open Windows Device Manager and look under "Ports (COM & LPT)". You should see Cisco USB Console or a similar entry assigned a specific COM port number (e.g., COM3). Terminal Configuration Settings