https://www.popularmechanics.com/science/a34229436/old-tv-br...
And there's a twist to this: ADSL data networks attempt to feed broadband signals over unshielded (and poorly balanced) phone lines, which means that they are intolerant of legitimate radio emissions from licensed services nearby.
The ADSL system attempts to compensate for conventional transmissions by dropping out those channels, but any wideband impulse causes the entire system to hang while it unsuccessfully tries to find a clear set of channels. So each pulse locks up the system for a few minutes while it renegotiates.
A variation on this is the ignition on the Postman's motor bike which wipes out all the ADSL in each street that he visits.
The bottom line of course is that ADSL was a horrible hack which attempts (and fails) to bypass the laws of physics.
There is quite something magical in switching an ISP box in the middle of the living room, awaiting for the synchronization and, behold, I am connected.
This first connection i ssomething I always long for (whether the satellite we had in my job, or fiber that comes at home, or getting rid of the ISP router to replace with mine).
Copper wires in Spain I think, from the old phone days.
When the Radio Inspector came to check, he found a rechargeable torch sitting in it's charger bracket, which generated horrendous interference whenever the batteries reached full.