Understanding Led Indicators; Power And System Leds; Ports 1~16 Status Leds - D-Link DGS-1216T User Manual

UNDERSTANDING LED INDICATORS

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

Power and System LEDs

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

Ports 1~16 Status LEDs

Link/Act:
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 :
No link.
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