3Com 4210 PWR Configuration Manual page 348

346 C 31: P E C
HAPTER O ONFIGURATION
[SwitchA-Ethernet1/0/8] poe priority critical
[SwitchA-Ethernet1/0/8] quit
# Set the PoE management mode on the switch to auto (it is the default mode, so
this step can be omitted).
[SwitchA] poe power-management auto
# Enable the PD compatibility detect of the switch to allow the switch to supply
power to part of the devices noncompliant with the 802.3af standard.
[SwitchA] poe legacy enable