HomePlug AV - This 200 Mbps networking standard works over home electrical wiring. HomePlug AV is designed around IPTV (Internet protocol television). With IPTV, a single pipe delivers TV programming, Internet access, and often telephony. 

See Broadband Service Provided Over High-power Utility Lines.
See HomePlug Powerline Alliance.
See Zyxel

See the Interactive Television Institute.