3com 8807 User Guide

The PoE-capable Switch 8800 Family series can monitor the external PoE PSUs 
through the power supervision module on the PoE external power system.

The PoE PSU supervision module enables you to:

■

Set the alarm thresholds for the AC input voltages of the PoE PSUs.

■

Set the alarm thresholds for the DC output voltages of the PoE PSUs.

■

Query PSU information such as voltage and power.

You can set the AC input alarm thresholds for the PoE PSUs to enable the Switch 
8800 Family series to monitor the AC input voltages of the PSUs in real time 
through the PoE supervision module.

n 

■

You can set the thresholds to any appropriate values in the range, but make 
sure the lower threshold is less than the upper threshold.

■

For 220 VAC input, it is recommended to set the upper threshold to 264 V and 
the lower threshold to 181 V.

■

 For 110 VAC input, it is recommended to set the upper threshold to 132 V and 
the lower threshold to 90 V.

■

Set the overvoltage alarm threshold of AC input for PoE PSUs to 264.0 V.

■

Set the undervoltage alarm threshold of AC input for PoE PSUs to 181.0 V.

Table 671   AC input alarm thresholds configuration tasks

1 

Enter system view 

system-view 

- 

2 

Set the overvoltage alarm 
threshold of AC input 
(upper threshold) for the 
PoE PSUs 

poe-power input-thresh 
upper string 

Required, and the max 
voltage is 264.0 V. 

3 

Set the undervoltage alarm 
threshold of AC input (lower 
threshold) for the PoE PSUs 

poe-power input-thresh 
lower string 

Required, and the min 
voltage is 90.0 V. 

4 

Display the AC input state of 
each PoE PSU 

display poe-power 
ac-input state 

Optional, and you can 
execute this command in 
any view.