Sending Data Through Your Wall Outlets
Your electrical wiring does more than just power your lamps. It simultaneously acts as a high-speed data network, carrying internet signals right alongside the electricity flowing through your walls.
This technology uses the existing metal conductors in your home to transmit digital information without needing new cables. By sending data at frequencies far higher than the standard power grid, your outlets become entry points for network connectivity. It is a clever way to turn mundane infrastructure into a digital highway. You can even use these adapters to get internet in rooms where wireless signals struggle to reach.
Source: Power-line communication