Two more home networking methods are possible, but they're almost always provided as supplements to other services. These systems use the internal telephone wiring that connects extension telephones in several rooms or the coaxial cable (coax) that provides cable TV signals. The industry group that promotes home networks through telephone wires is called HomePNA (the Home Phoneline Networking Alliance); MoCA (Multimedia over Coax Alliance) is the comparable group for coax.

Don't confuse internal telephone or coax wiring with the DSL and cable services that connect high-speed Internet service to your home or business LAN; HomePNA and MoCA are strictly for distributing network service within a building.

HomePNA and MoCA are less flexible than HomePlug network wiring because most homes already have a lot more built-in AC power sockets than telephone or TV outlets. However, if the phone boxes or cable outlets are already in convenient locations, it might be practical to consider HomePNA or MoCA as an alternative to Wi-Fi or separate Ethernet wiring.