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Chapter 3:
SFE2000/SFE2000P Gigabit Ethernet Switch Reference Guide
Chapter
3
Managing Power-over-Ethernet Devices
Power-over-Ethernet (PoE) provides power to devices over existing LAN cabling, without updating or
modifying the network infrastructure. Power-over-Ethernet removes the necessity of placing network
devices next to power sources.
Power-over-Ethernet can be used in the following applications:
• IP Phones
• Wireless Access Points
•IP Gateways
•PDAs
• Audio and video remote monitoring
Powered Devices are devices which receive power from the device power supplies, for example IP
phones. Powered Devices are connected to the device via Ethernet ports. Guard Band protects the device
from exceeding the maximum power level. For example, if 400W is maximum power level, and the
Guard Band is 20W, if the total system power consumption exceeds 380W no additional PoE
components can be added. The accumulated PoE components power consumption is rounded down for
display purposes, therefore remove value after decimal point.
Defining PoE System Information
The PoE Settings Page contains system PoE information for enabling PoE on the device, monitoring the
current power usage, and enabling PoE traps.
1. Click Bridging > Port Management > PoE Settings. The PoE Settings Page opens:
NOTE: Due to hardware limitations, the power
measurement accuracy is 4%.