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
Redundancy
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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