Constant Connection/Package Loss and T3 Timeout in the Model Event Log
Our apartment is using the Xfinity Internet. We first identified the connection issue by seeing frequent lost conncection notification from different services on almost all devices. We started troubleshooting by restarting the modem and carefully reconnecting the cables. We also tested on a Ethernet connected PC to filter out the impact of wireless router. We eventually logged into the modem to check the cable connection status. Here is the screenshots of the status page and the event log:
The downstream seems OK, but the upstream power is at its maximim. (And we are aware of there is only one US channel locked. Hopefully that's not an problem.) The T3 timeout occurs all the time since two weeks ago. In fact, the T3 recorded time in the screenshot is exactly when we logged into the page. Suggested by the high US power, extreme frequent T3 timeout, and constant connection loss on the application layer, we suspect that there is some physical connection or cable issues from our model to the local hub.
We believe the assistance from Xfinity is required since we have done almost all we can do on our side. As we are all working from home, the Internet problem becomes critical and we hope it can be fixed fast. Could you please send techical support or let us know what should we do next?