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.

Keywords:

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


Q&A:

• How to supply power from a PoE switch?
• Can we supply power from a non PoE switch?
• Can we supply power to a mix of PoE and non PoE networked devices?
• Is there a limit on the distance of PoE cable?
• Will PoE kill a non-PoE device?