3com 8807 User Guide

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 61: P

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ONFIGURATION

If PSE4500-A power system is taken as the external power supply of the switch, 
the power distribution is as follows:

1 Input voltage: 110 VAC

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One or two PSUs (power supply unit) of the PSE4500-A power system can 
provide 1,200 W of power.

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If the PSE4500-A power modules work in 2+1 redundancy backup mode, an 
output power of 2,500 W is provided and one power module works for the 
purpose of backup.

2 Input voltage: 220 VAC

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In the PSE4500-A power system, one power module can provide a power of up 
to 2,500 W and two modules can provide a power of up to 4,500 W. When 
working in the 1+1 backup mode, the system provides a power of up to 2,500 
W.

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If the PSE4500-A power modules are in 2+1 redundancy, an output power of 
up to 4500 W is provided and one power module works for the purpose of 
backup.

The following service card of the Switch 8800 Family series supports PoE:

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GV48D

c 

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When the actual power exceeds the set value, the port with a lower priority 
stops supplying power so that the port with a higher priority can supply power.

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To ensure power supply to the "last PD" and provide redundant power to 
prevent a transient rise of module power consumption, by default, a buffer of 
19 W is reserved on the chip. For example, if you set the maximum PoE power 
for the module to 400 W, a power of 381 W only can be guaranteed to 
respond quickly for stable power supply.

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Currently, you can set a PoE power ranging from 37 W to 806 W on the PoE 
modules of the Switch 8800 Family series routing switches. By default, the 
power for a PoE module is 806 W.

The Switch 8800 Family series can automatically detect any connected device that 
needs remote power supply and feeds power to this device.

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Depending on your actual network requirement, you can set the maximum PoE 
power totally supplied by the switch through the command line.

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You can set the maximum PoE power supplied by a card through the command 
line.

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You can also control the PoE on each PoE port independently through the 
command line. The control includes: enabling/disabling the PoE feature, and 
setting the maximum PoE power, the PoE mode and the PoE priority on the 
port.

The following table describes the PoE configuration tasks on the Switch 8800 
Family series.