3Com Baseline 2928 PWR Plus User Manual page 504

Configuration procedure
# Enable PoE on GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2, and configure their power supply
priority to critical.
Select PoE > PoE from the navigation tree and click the Setup tab to perform the following
configurations, as shown in
Figure 1-5 Configure the PoE ports supplying power to the IP telephones
Click to select ports GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 from the chassis front panel.
Select Enable from the Power State drop-down list.
Select Critical from the Power Priority drop-down list.
Click Apply.
# Enable PoE on GigabitEthernet 1/0/11 and configure the maximum power of the port to 9000
milliwatts.
Click the Setup tab and perform the following configurations, as shown in
Figure 1-5.
1-6
Figure 1-6.