Hi @bainbrij,
Thank you for coming back to me about this issue and thank you for running these checks.
Sorry, when I asked if you're able to unplug and reconnect the landline, I meant if you can unplug your landline phone from the Hub and then reconnect to see if this can help with the issue.
Does your Hub re-start a lot throughout the day? Do you experience a lot of disconnections on different devices?
Let me know so I can help. Thank you.