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

IEEE 802.3at-2009

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


802.11n and PoE

In this chapter you will learn about the various ways that an Ethernet cable can be used to provide power to networking devices. Power over Ethernet (PoE) is not a Wi-Fi technology, nor is it used specifically for Wi-Fi devices. However, it has become the predominant method for powering enterprise-class access points, thus making it a necessary and important ...

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