Spare cables modes: PSE uses the twisted pairs (4, 5, 7 and 8) of category-3/5 cables, which are
spare during data transmission, to power the PD.
3Com Switch 4500G only support for signal mode.
Configuring a PoE Interface through the Command Line
Enter system view
Enter PoE interface view
Configure the maximum power
for the PoE interface
Configure the PoE mode for the
Configure a description for the
PD connected to the PoE
Configuring PoE Interfaces Through a PoE Configuration File
A PoE configuration file is used to configure at the same time multiple PoE interfaces with the same
attributes to simplify operations. This configuration method is a supplement to the command line
The PoE configuration file features:
You can create multiple PoE configuration files for different user group and apply the specific PoE
configuration file to the port a user group uses.
When you use a PD on a port with PoE configuration file being applied, the configuration in the PoE
configuration file will be enabled.
Commands in a PoE configuration file are called configurations.
Use the command...
poe max-power max-power
poe mode signal
poe pd-description string
Disabled by default.
15,400 milliwatts by default.
signal (power over signal
cables) by default.
By default, no description for
the PD connected to the PoE
interface is available.