Operation Manual – PoEH3C S5500-EI Series Ethernet Switches Chapter 1 PoE Configuration1-1Chapter 1 PoE ConfigurationWhen configuring PoE, go to these sections for information you are interested in:z PoE Overviewz PoE Configuration Task Listz Configuring the PoE Interfacez Configuring PD Power Managementz Configuring a Power Alarm Threshold for the PSEz Upgrading PSE Processing Software Onlinez Configuring a PD Disconnection Detection Modez Enabling the PSE to Detect Nonstandard PDsz Displaying and Maintaining PoEz PoE Configuration Examplez Troubleshooting PoE1.1 PoE Overview1.1.1 Introduction to PoEPower over Ethernet (PoE) means that power sourcing equipment (PSE) suppliespower to powered devices (PD) such as IP telephone, wireless LAN access point, andweb camera from Ethernet interfaces through twisted pair cables.I. Advantagesz Reliable: Power is supplied in a centralized way so that it is very convenient toprovide a backup power supply.z Easy to connect: A network terminal requires only one Ethernet cable, but noexternal power supply.z Standard: In compliance with IEEE 802.3af, and a globally uniform power interfaceis adopted.z Promising: It can be applied to IP telephones, wireless LAN access points,portable chargers, card readers, web cameras, and data collectors.II. CompositionA PoE system consists of PoE power, PSE, and PD.z PoE powerThe whole PoE system is powered by the PoE power, which includes external PoEpower and internal PoE power.z PSE
