Baofeng — Uv-s9 Plus Programming Software
If utilizing an FTDI cable, modern operating systems will automatically configure it plug-and-play. For Prolific or CH340 cables, ensure the official manufacturer driver is installed via the Windows Device Manager to open the necessary virtual COM port.

Maybe I’m missing something, but I haven’t found any way to get the bandwidth-test CLIENT to use ports other than 2000 if you need to set the server side to different ports. I’ve determined that changing the server settings on the client side doesn’t affect the client’s behavior, it just keeps trying to use 2000.
I went back to double check it, but when I connected the client to a non-standard port, it negotiated the port automatically. I was using ROS 6.46.4 and tried multiple ports. Each time, the client auto negotiated without any trouble.