Chapter 1 Poe Configuration; Poe Overview; Introduction To Poe - H3C S5500-EI series Operation Manual

Operation Manual – PoE
H3C S5500-EI Series Ethernet Switches

Chapter 1 PoE Configuration

When configuring PoE, go to these sections for information you are interested in:

PoE Overview

PoE Configuration Task List
Configuring the PoE Interface
Configuring PD Power Management
Configuring a Power Alarm Threshold for the PSE
Upgrading PSE Processing Software Online
Configuring a PD Disconnection Detection Mode
Enabling the PSE to Detect Nonstandard PDs
Displaying and Maintaining PoE
PoE Configuration Example
Troubleshooting PoE
1.1 PoE Overview

1.1.1 Introduction to PoE

Power over Ethernet (PoE) means that power sourcing equipment (PSE) supplies
power to powered devices (PD) such as IP telephone, wireless LAN access point, and
web camera from Ethernet interfaces through twisted pair cables.
I. Advantages
Reliable: Power is supplied in a centralized way so that it is very convenient to
provide a backup power supply.
Easy to connect: A network terminal requires only one Ethernet cable, but no
external power supply.
Standard: In compliance with IEEE 802.3af, and a globally uniform power interface
is adopted.
Promising: It can be applied to IP telephones, wireless LAN access points,
portable chargers, card readers, web cameras, and data collectors.
II. Composition
A PoE system consists of PoE power, PSE, and PD.
PoE power
The whole PoE system is powered by the PoE power, which includes external PoE
power and internal PoE power.
PSE
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Chapter 1 PoE Configuration