We have several pc's getting their network connectivity through the Polycom VVX450 phones and normally haven't had any issues with network performance. After over two years one pc started experiencing poor network performance. We direct connect the pc to the network jack and performance is back to normal. We've tried another phone and performance is degraded. Removed the NIC card and reinstalled. Ran firmware updates. Changed ports on the switch. No errors are showing up in the switch log. Changed patch cables. Nothing seems to resolve the problem. Unfortunately due lack of wiring this pc is forced to go through the phone for network connectivity. Has anyone else every experienced this issue and if so how did you resolve it?

Any input would be appreciated.

Thank you,