If no POE adapter is installed this object is read-only and will always report notSupported(1). The possible values are: notSupported(1): No adapter installed or not supported for that port (i.e. uplink port). off(2): Adapter installed but inline power for that port is switched off. forcedOn(3): Adapter installed and inline power is asserted permanently. In the case of an IEEE802.3af adapter this setting will disable the IEEE802.3af automatic detection. autoOn(4): This setting is only supported if a IEEE802.3af adapter is installed. The adapter automatically detects if the connected device is IEEE802.3af compliant and will assert the power if possible. overloadFail(5): Adapter installed but inline power for that port is automatically switched off because of a overload condition at that port.