Poe - D-Link xStack DGS-3420 Series Reference Manual

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch Web UI Reference Guide
The fields that can be configured are described below:
Parameter
Unit
Jumbo Frame
From Port / To Port
State
Click the Apply button to implement changes made.

PoE

The DGS-3420-28PC and DGS-3420-52P switches support Power over Ethernet (PoE) as defined by the IEEE
802.3af and 802.3at. All ports can support PoE up to 30W. Ports 1-24 can supply about 48 VDC power to Powered
Devices (PDs) over Category 5 or Category 3 UTP Ethernet cables. The Switch follows the standard PSE (Power
Sourcing Equipment) pinout Alternative A, whereby power is sent out over pins 1, 2, 3 and 6. The Switches work
with all D-Link 802.3af capable devices.
The Switch includes the following PoE features:
•
Auto-discovery recognizes the connection of a PD (Powered Device) and automatically sends power to it.
•
The Auto-disable feature occurs under two conditions: firstly, if the total power consumption exceeds the
system power limit; and secondly, if the per port power consumption exceeds the per port power limit.
•
Active circuit protection automatically disables the port if there is a short. Other ports will remain active.
Based on 802.3af/at PDs receive power according to
the following classification:
Class Maximum power available to PD
0
1
2
Figure 2-7 Jumbo Frame Settings window
Description
Select the unit you wish to configure.
Use the radio buttons to enable or disable the Jumbo Frame function on the Switch. The
default is Disabled. When disabled, the maximum frame size is 1536 bytes. When
enabled, the maximum frame size is 13312 bytes.
Select the appropriate port range used for the configuration here.
Use the drop-down menu to enable the Jumbo Frame for the port.
12.95W
3.84W
6.49W
PSE provides power according to the following
classification:
Class
0
1
2
14
Max. power used by PSU
16.2W
4.2W
7.4W