Double-check that your terminal software is set to 9600 baud. If the device was previously configured with a different speed, you may need to test 115200 baud.
If you have downloaded , you likely have a Cisco switch or router with a USB console port and need to establish a connection. This article covers what this software is, why version 3.1 matters, and how to install and use it. usb console software 3.1 - cisco-usbconsole-driver-3-1.zip
Note: Recent user reports confirm that the 64-bit installer within this version works on . Double-check that your terminal software is set to 9600 baud