D-Link DGS-3000 Series Reference Manual page 32

The following parameters can be configured:
Parameter
From Port / To Port
State
Time Range
Priority
Power Limit
DGS-3000 Series Gigabit Ethernet Switch Web UI Reference Guide
Figure 2-17 PoE Port Settings window
Description
Select a range of ports from the drop-down menus to be enabled or disabled for PoE.
Use the drop-down menu to enable or disable ports for PoE.
Select a range of the time to the port set as PoE. If Time Range is configured, the power
can only be supplied during the specified period of time.
Use the drop-down menu to select the priority of the PoE ports. Port priority determines the
priority which the system attempts to supply the power to the ports. There are three levels
of priority that can be selected, Critical, High, and Low. When multiple ports happen to have
the same level of priority, the port ID will be used to determine the priority. The lower port
ID has higher priority. The setting of priority will affect the order of supplying power.
Whether the disconnect method is set to deny low priority port, the priority of each port will
be used by the system to manage the supply of power to ports.
This function is used to configure the per-port power limit. If a port exceeds its power limit, it
will shut down.
For 802.3af capable devices, the minimum output power levels of PSE devices for each
class is:
Class 0 – 15.4 Watts
Class 1 – 4.0 Watts
Class 2 – 7.0 Watts
Class 3 – 15.4 Watts
Class 4 – Treat as Class 0
For 802.3at capable devices with power allocation of 0.1 Watt granularity, using the LLDP
method, the minimum output power levels of PSE devices for each class is:
Class 0 – 15.4 Watts
Class 1 – 4.0 Watts
Class 2 – 7.0 Watts
Class 3 – 15.4 Watts
Class 4 – 15.4 or 30 Watts
The following is the power limit applied to the port for these five classes. For each class,
the power limit is a little more than the power consumption range for that class. This takes
into account any power loss on the cable. Thus, the following are the typical values:
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