Communications networks using Power over Ethernet (PoE) technology can now deliver electrical power, as well as transmit communications signals, over standard low-voltage Ethernet cabling to various endpoints, including LED lighting, HVAC controls, cameras and other networked devices, in new or existing commercial buildings. Giovanni Frezza, Group Product Manager for Network Connected Solutions at Molex, reviews PoE technology and standards, discussing how it can power smart lighting and building automation systems, and the benefits these can deliver for building operators and occupants.