D-Link DES-2108 User Manual page 21

Gateway: Shows the Gateway set of the device.
Group Interval: Shows the time that the switch will be
discovered in the SmartConsole Utility List.
View Trap:
from the Web Management Switch in the Monitor List.
There is a light indicator behind the "View Trap" button, when the
light indicates in green, it means that there is no trap transmitted, and
else when it indicates in red, it means that there is new trap
transmitted, this is to remind us to view the trap. (Figure 6.)
When the "View Trap" button is clicked, a Trap Information window
will pop out, it will show the trap information including the Symbol,
Time, Device IP and the Event occurred. (Figure 7. Trap information)
The symbol " " represents the trap signal arise, this symbol will
disappear after you review and click on the event record.
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The Trap function can receive the events that happen
Figure 7. Trap information
Figure 6.