Hi @dubs1948, thanks for your post although I'm sorry you're getting broadband dropouts.
If you are referring to the home phone switchover, where your landline becomes active through the Hub (otherwise known as 21CV) then it depends entirely on what is actually dropping out.
If it's just the wifi that's disconnecting, then this won't necessarily impact your landline services as that's connected via a cable to the Hub directly.
However, it's concerning you're getting dropouts anyway so having ran checks on your line, it appears that you have some issues with the power levels going to your Hub directly which may be causing this.
With this in mind, I'd like to arrange a technician to come out to you to get this resolved so you're not experiencing these problems anymore.
Please expect a PM shortly where I'll ask you some security questions, just so I can get this booked in for you - please respond directly.
Many thanks
Tom_W