D-Link Xstack DES-3528 Series Reference Manual page 29

xStack® DES-3528/DES-3552 Series Layer 2 Managed Stackable Fast Ethernet Switch Web UI Reference Guide
The following parameters can be configured:
Parameter
Unit
From Port / To Port
State
Time Range
Priority
Power Limit
Figure 2-15 PoE Port Settings window
Description
Select the unit to configure.
Select a range of ports from the pull-down menus to be enabled or disabled for PoE.
Use the pull-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 pull-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.
Based on 802.3af/802.3at, there are different PD classes and power consumption
ranges;
Class 0 – 0.44~12.95W
Class 1 – 0.44~3.84W
Class 2 – 3.84~6.49W
Class 3 – 6.49~12.95W
Class 4 – 12.95W~29.5W (only ports 1~8)
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;
Class 0 : 15400mW
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