D-Link DES-1252 - Manual (Page 39)

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by clicking Apply. To refresh the information table to view the latest
Link Status and Priority, press the Refresh button.
Figure 25 – System > Port Setting
Speed: Gigabit Fiber connections can operate in Forced Mode settings
(1000M Full), Auto, or Disable. Copper connections can operate in
Forced Mode settings (100M Full, 100M Half, 10M Full, 10M Half),
Auto, or Disable. The default setting for all ports is Auto. 100Base-FX
Fiber supports 100M full/half force mode.
NOTE: Be sure to adjust port speed settings appropriately after
changing connected cable media types.
Link Status: Reporting Down indicates the port is disconnected.
Priority: Displays each port’s 802.1p QoS priority level for received
data packet handling. Default setting for all ports is Middle. You can
change the priority settings in Qos > 802.1p Default Priority