Wikipedia
G.hn
G.hn is a specification for home networking with data rates up to 1 Gbit/s and operation over three types of legacy wires: telephone wiring, coaxial cables and power lines. A single G.hn semiconductor device is able to network over any of the supported home wire types. Some benefits of a multi-wire standard are lower equipment development costs and lower deployment costs for service providers (by allowing customer self-install).