Chapter 17. Power over Ethernet (PoE)

IN THIS CHAPTER, YOU WILL LEARN ABOUT THE FOLLOWING:

  • History of PoE

    • Nonstandard PoE

    • IEEE 802.3af

    • IEEE Std. 802.3-2005, Clause 33

  • PoE devices (overview)

    • Powered device (PD)

    • Power-sourcing equipment (PSE)

    • Endpoint PSE

    • Midspan PSE

    • Power-sourcing equipment pin assignments

  • Planning and deploying PoE

    • Power planning

    • Redundancy

Power over Ethernet (PoE)

History of PoE

The concept of providing power from the network dates back to the birth of the telephone, which to this day still receives power from the telephone network. Computer networking devices that are often powered with PoE are desktop Voice over IP (VoIP) phones, cameras, and access points. Ethernet ...

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