D-Link DGS-1250 Series - Interface Description; Poe

DGS-1250 Series Gigabit Ethernet Smart Managed Switch Web UI Reference Guide
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Interface Description
This window is used to display the status, administrative status, and description of each port on the Switch.
To view the following window, click System > Interface Description, as shown below:
Figure 3-9 Interface Description Window
Enter a page number and click the Go button to navigate to a specific page when multiple pages exist.
PoE
The DGS-1250-28XMP and DGS-1250-52XMP switches support Power over Ethernet (PoE) as defined by the IEEE
802.3af and 802.3at. All PoE-supported ports can supply up to 30 Watts of power. The Switch ports can supply about
48 VDC power to Powered Devices (PDs) over Category 5 or Category 3 UTP Ethernet cables. The Switch follows the
standard Power Sourcing Equipment (PSE) pin-out 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 and automatically sends power to it.
• The auto-disable feature occurs under two conditions:
o If the total power consumption exceeds the system power limit
o 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 IEEE 802.3af/at, power is received and supplied according to the following classifications:
Class Maximum power used by the PD Maximum power supplied by the Switch
0
12.95 Watts 15.4 Watts
1
3.84 Watts 4 Watts
2
6.49 Watts 7 Watts
3
12.95 Watts 15.4 Watts
4
25.5 Watts 30 Watts