Impressed by Broadband Resilience

I lost my home telephone service this week. The dial tone just went leaving a vague electrical noise on the line. So I swapped out the handset, tried dialling without the broadband filter, checked the visible wiring etc. and all seemed fine. But what struck me as weird throughout this was the fact that my broadband service was working well. I had a connection with a good speed as normal so figured that there could not be any problem with the actual wiring. (I had done a quick check to be sur