Power over Ethernet (PoE) is a technology for wired LANs that allows the electrical current, necessary for the operation of each networked device, to be carried by the data cables rather than by power cords. By minimizing the number of wires that must be run in order to install and maintain a network, network architects and engineers will find that PoE can lower overall networking costs, reduce downtime, provide easier maintenance, and greater installation flexibility than with traditional wiring. This crash course will arm you with the knowledge to make PoE work for you.
Power over Ethernet for network architects
David Jacobs discusses how Power over Ethernet (PoE) is defined by the 802.3af standard, then looks at how PoE can help network architects simplify power distribution and potentially save money.
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Power over Ethernet for network engineers
This introduction to Power over Ethernet (PoE) is directed toward network engineers and discusses how the technology works, its power capabilities and some benefits it provides for the network administrator or manager.
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Helping PoE reach its potential
Power over Ethernet is helping bring to organizations and individuals to enjoy the benefits of a wired world. But with success comes greater responsibility. Now that the PoE standard is so widely adopted -- most networking equipment vendors support PoE in some form -- it's time for the standard to do more.
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IEEE 802.3at: Power over Ethernet plus
802.3af Power over Ethernet (PoE) has been widely adopted for powering VoIP phones, wireless access points and a number of other network-connected products. But it provides a limited amount of power. In this tip, David Jacobs investigates the latest developments in 802.3at PoE, designed to deliver more power to each device.
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Our infrastructure and project management experts, Carrie Higbie and Scott Haugdahl, address what the future holds for PoE, describe some advantages and disadvantages to PoE.
