Hello @scribjen , thank you for the information.
As long as the IPv4 setup process is completed and functional, you should now be able to access the device’s web interface (for configuration) as well as interact with the serial port either by TELNET or by virtual COM port on your computer (when setup using the provided software).
My recommendation would be to first try with a loop-back test. This will help verify if the issue comes from the serial device/setup itself, or rather the serial configuration, equipment etc.
This troubleshooting guide is a good starting point to validate the setup and loop-back of your device. If the loop-back fails, please contact our Technical Support, while in front of your equipment and we will be happy to assist you directly.
I look forward to hearing back from you.
Emmanuel B.
StarTech.com Support