Power feed for Ethernet telephones via Ethernet link

作者: Maurilio Tazio De Nicolo

DOI:

关键词: Twisted pairTransformerEthernetSecond primary cancerPower transmissionDelta-wye transformerConductorEngineeringElectrical engineeringElectrical conductor

摘要: An Ethernet device power transmission system includes an input transformer, output transformer and a pair of twisted conductors. The primaries for connection to source data. also secondaries, each having center-tap. A first conductor is connected across the secondary, second secondary DC-bias provided between respective center taps secondaries. At local end, center-tapped primary load device. are processor extraction DC power.