Switch User Manual

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1 PoE Configuration
When configuring PoE, go to these sections for information you are interested in:
z PoE Overview
z PoE Configuration
z PoE Configuration Example
The terms switching engine and Ethernet switch used throughout this documentation refer to a
switching device in a generic sense or the switching engine of a unified switch in the WX3000 series.
PoE Overview
Introduction to PoE
Power over Ethernet (PoE)-enabled devices use twisted pairs through electrical ports to supply power
to the remote powered devices (PD) in the network and implement power supply and data transmission
simultaneously.
Advantages of PoE
z Reliability: The centralized power supply provides backup convenience, unified management, and
safety.
z Easy connection: Network terminals only require an Ethernet cable, but no external power supply.
z Standard: PoE conforms to the 802.3af standard and uses a globally uniform power interfaces;
z Bright application prospect: PoE can be applied to IP phones, wireless access points (APs),
chargers for portable devices, card readers, network cameras, and data collection system.
PoE components
PoE consists of three components: power sourcing equipment (PSE), PD, and power interface (PI).
z PSE: PSE is comprised of the power and the PSE functional module. It can implement PD
detection, PD power information collection, PoE, power supply monitoring, and power-off for
devices.
z PD: PDs receive power from the PSE. PDs include standard PDs and nonstandard PDs. Standard
PDs conform to the 802.3af standard, including IP phones, Wireless APs, network cameras and so
on.
z PI: PIs are RJ45 interfaces which connect PSE/PDs to network cables.