Is your broadband connection working on the router?
If they ignore three such warnings, their broadband connection can then be cut.
Since light does not travel through walls, there would be no need to worry about neighbours snooping on your e-mail, or piggybacking on your broadband connection.
Telephony, once the mainstay of the industry, is just one service that can be offered over broadband connections, which will increasingly depend on new fibre-optic and wireless technology, not copper.
