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What is PoE?

PoE stands for Power over Ethernet.  It is a technology for supplying power or electricity to networked devices installed in locations where power is not readily available.  The technology allows electricity to be supplied on the same Ethernet cable that supplies data.  The technology was first ratified by the Institute of Electrical and Electronic Engineering in the USA in 2003 as a standard.


PoE Plus
PSE and PD
Mid Span & End Span
Alternative A & B

Injector & Splitter


Other Topics:
August 2008 Injector & Splitter
August 2008 Alternative A & B
August 2008 Mid Span & End Span
August 2008 PSE and PD
August 2008 PoE Plus
August 2008 Will PoE kill a non-PoE device?
August 2008 Is there a limit on the distance of PoE cable?
August 2008 Can we supply power to a mix of PoE and non PoE networked devices?
August 2008 Can we supply power to any networked device including PoE and non PoE?
August 2008 Can we supply power from a non PoE switch?
August 2008 How to supply power from a PoE switch?
August 2008 Specification & Pricing for PoE
August 2008 Applications of PoE
August 2008 What is PoE?