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NP2624M User Guide 9
YML827 Rev1
1.4 LED indicators information
There are many LEDs on the front panel of switch. After the initial power on, these LEDs will
reflect the current status within the switch as explained below:
There is one power LED on the left side of the front panel. When power is applied, it turns green.
Below it is a Diagnostic LED which will blink whilst conducting power-on diagnostics. There are
two more FAN status LEDs beside the power LEDs. The upper one indicates the left fan status
and the lower one indicates the right fan status. These will turn RED if a fan has stopped or is
malfunctioning. Otherwise these LEDs will switch off when the fans are working normally.
Each of the RJ-45 10/100Mbps connectors has two LEDs built-in to its upper corners. The left one
indicates the link status and activity, while the right one indicates the speed.
The LEDs for the optional Gigabit module are somewhat different. The upper yellow LED indicates
a 10Mbps LINK, the middle green LED indicates a 100Mbps LINK, but for 1000Mbps, or Gigabit,
both upper and middle LEDs are lit (i.e. when a Gigabit port is linked with another Gigabit port).
LED Color Status
Solid Blinking
Power
Green Turn solid green when
power is applied to
this device.
N/A
DIAG
Green Successful diagnostic. During power on
diagnostics
FAN
Red Left or Right side fan
fail.
N/A
LINK/ACT
Green Successful connection
with Fast Ethernet.
Sending, receiving or
collision packets
10/100M
Green Successful connection
with 100Mbps Fast
Ethernet.
N/A
Vanish Successful connection
with 10Mbps Fast
Ethernet.
N/A