Serial Port Settings - D-Link xStack Reference Manual

xStack® DGS-3120 Series Layer 2 Stackable Managed Switch Web UI Reference Guide
The following parameters can be configured:
Parameter
Unit
From Port / To Port
State
Time Range
Priority
Power Limit
Click Apply to implement changes made. The port status of all PoE configured ports is displayed in the table in the
bottom half of the screen shown above.

Serial Port Settings

This window allows the user to adjust the Baud Rate and the Auto Logout values.
To view the following window, click System Configuration > Serial Port Settings, as show below:
Figure 2-8 PoE Port Settings window
Description
Select the unit you wish 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 – 0.44~15.4W
Class 1 – 0.44~4.0W
Class 2 – 4~7.0W
Class 3 – 7~15.4W
Class 4 – 15.4W
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 – 16200mW
Class 1 – 4200mW
Class 2 – 7400mW
Class 3 – 16200mW
User Define – 35000mW
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