3Com Switch 7750 Series
Command Reference Guide – PoE Chapter 2 PoE PSU Supervision Configuration Commands
2-8
Description
Use the poe-power input-thresh upper command to set the overvoltage alarm
threshold of AC input for the external PoE PSUs.
For 220 VAC input, the recommended value is 264.0 V; For 110VAC input, the
recommended value is 132.0 V.
Example
# Set the overvoltage alarm threshold of AC input for the external PoE PSUs to 264.0 V.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] poe-power input-thresh upper 264.0
Set upper input-threshold power successfully!
2.2.3 poe-power output-thresh lower
Syntax
poe-power output-thresh lower string
View
System view
Parameter
string: Undervoltage alarm threshold (in volts V) in the format of X.X, in the range of
45.0 to 47.0.
Description
Use the poe-power output-thresh lower command to set the undervoltage alarm
threshold of DC output for the external PoE PSUs.
For either 220 VAC or 110 VA C input, the recommended threshold is 47.0 V.
Example
# Set the undervoltage alarm threshold of DC output for the external PoE PSUs to 47.0
V.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] poe-power output-thresh lower 47.0
Set lower output-threshold power successfully!