Poe Configuration; Poe Overview; Introduction To Poe - 3Com S7906E Configuration Manual

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PoE Configuration

The S7900E Series Ethernet Switches are distributed devices supporting Intelligent Resilient
Framework (IRF). Two S7900E series can be connected together to form a distributed IRF device. If
an S7900E series is not in any IRF, it operates as a distributed device; if the S7900E series is in an
IRF, it operates as a distributed IRF device. For introduction of IRF, refer to IRF Configuration in the
System Volume.
When configuring PoE, go to these sections for information you are interested in:

PoE Overview

PoE Configuration Task List
Enabling PoE
Detecting PDs
Configuring the PoE Power
Configuring PoE Power Management
Configuring the PoE Monitoring Function
Configuring PoE Interface through PoE Profile
Upgrading PSE Processing Software in Service
Displaying and Maintaining PoE
PoE Configuration Example
Troubleshooting PoE
PoE Overview

Introduction to PoE

Power over Ethernet (PoE) means that power sourcing equipment (PSE) supplies power to powered
devices (PDs) from Ethernet interfaces through twisted pair cables.
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 no external power supply but only an Ethernet cable.
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 (APs), portable
chargers, card readers, web cameras, and data collectors.
Composition
As shown in Figure 1-1, a PoE system consists of PoE power, PSE, power interface (PI), and PD.
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