... 1, Spec: Passive POE (Power Over Ethernet) adapter, uses unused pairs of 100baseT Power over Ethernet Injector 12V TO 18V1), Spec: Passive ... POE (Power Over Ethernet) adapter, uses unused pairs of 100baseT network cable to transmit ... = negative.3), voltage IS 12V TO 18V4), Efficiency - DC-DC converter is required for 802.3af5), power LED, and is available ...