Hey Greg,
So, I have done sound diagnostics on my Logitech USB headset. Both input and output sounds are working with my computer. The problem seems to lay in the Phone Link app itself. It's a 50/50 chance that my call audio will be directed through my headset. And after that once I can hear them through my headset a 50/50 chance of whether or not the person I'm calling would even be able to hear me. By no means am I computer Savvy but through process of elimination, it seems like the fault is with the app not having a specified function to allow for someone to use a headset with the app. As a byproduct, there is no functionality to troubleshoot the issue and tell the app you wish to use the headset. hopefully this is a feature that we can see soon.
Thanks for taking the time to read!
A