Gartner Research

Overview of Power over Ethernet

Published: 28 June 2005

ID: G00129203

Analyst(s): Severine Real


Equipment that meets the IEEE's 802.3af standard lets organizations distribute electricity to devices over Ethernet cabling. It can save them having to spend a lot of money on things like mains outlets and AC adapters.

Table Of Contents
  • Introduction
  • What Is Power over Ethernet?
  • How the Technology Works
    • System Architecture
    • Power Sourcing Equipment
    • Powered Devices
    • Power Classification
  • State of the Standard
  • Benefits
  • Issues
    • Heat Dissipation in the Wiring Closet
    • Fast Ethernet Versus Gigabit
  • Possible Uses of the Technology
    • VoIP Telephones
    • Wireless LAN
    • Others
  • Products and Strategies by Leading Vendors
    • PowerDsine
    • 3Com
    • Alcatel
    • Cisco
    • Enterasys
    • Extreme Networks
    • Foundry Networks
    • ProCurve Networking by Hewlett-Packard
    • Netgear
    • Nortel
    • SMC Networks
  • What to Expect Next From PoE
  • Conclusion
  • Recommendations

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