Poe Overview; Introduction To Poe - 3Com MSR 50 Series Configuration Manual

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PoE Overview

Introduction to PoE

P E C
O ONFIGURATION
When configuring PoE, go to these sections for information you are interested in:
"PoE Overview" on page 2175
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"Configuring the PSE" on page 2176
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"Configuring PoE Power Management" on page 2179
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"Configuring the PoE Monitoring Function" on page 2181
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"Upgrading PSE Processing Software Online" on page 2181
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"Configuring a PD Disconnection Detection Mode" on page 2182
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"Enabling the PSE to Detect Nonstandard PDs" on page 2182
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"Displaying and Maintaining PoE" on page 2183
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"PoE Configuration Example" on page 2183
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"Troubleshooting PoE" on page 2185
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n
The support for the features and commands in this document varies with devices.
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.
Advantages
Reliable: Power is supplied in a centralized way so that it is very convenient to
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provide a backup power supply.
Easy to connect: A network terminal requires only one Ethernet cable, but no
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external power supply.
Standard: In compliance with IEEE 802.3af, a globally uniform power interface
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is adopted.
Promising: It can be applied to IP telephones, wireless LAN access points,
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portable chargers, card readers, web cameras, and data collectors.
Composition
A PoE system consists of PoE power, PSE, and PD.
PoE power
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