Understanding Led Indicators; Power And System Leds; Ports 1~48 Status Leds - D-Link DGS-1248T User Manual

UNDERSTANDING LED INDICATORS

The front panel LEDs provides instant status feedback, and helps monitor and
troubleshoot when needed.
Figure 6. LED indicators of the Switch

Power and System LEDs

POWER: System Power Indicator
On : When the Power LED lights on, the Switch is receiving power.
When the Power turns off or the power cord has an improper
Off :
connection.
CPU: Management Indicator
Blinking : When the CPU is working, the CPU LED is blinking.
On/Off : The CPU is not working.

Ports 1~48 Status LEDs

Link/ACT: Link/Activity
On : When the Link/ACT LED lights on, the respective port is successfully
connected to an Ethernet network.
Blinking : When the Link/ACT LED is blinking, the port is transmitting or
receiving data on the Ethernet network.
Off : There is no link.
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