User`s guide

Dimension GS-3012 Gigabit Ethernet Switch
3-6 Hardware Connections
Figure 3-8 Front Panel LEDs
The following table describes the Ethernet port LEDs.
Table 3-2 Front Panel LED Descriptions
LED COLOR STATUS DESCRIPTION
BPS Green Blinking The system is receiving power from the backup power supply.
On The backup power supply is connected and active.
Off The backup power supply is not ready or not active.
PWR Green On
Off
The system is turned on.
The system is off.
SYS Green Blinking
On
Off
The system is rebooting and performing self-diagnostic tests.
The system is on and functioning properly.
The power is off or the system is not ready/malfunctioning.
ALM Red On
Off
There is a hardware failure.
The system is functioning normally.
LNK/ACT
(Gigabit ports)
Green Blinking
On
Off
The system is transmitting/receiving to/from an Ethernet network.
The link to a 10/1000 Mbps Ethernet network is up.
The link to an Ethernet network is down.
Amber Blinking
On
Off
The system is transmitting/receiving to/from an Ethernet network.
The link to a 100 Mbps Ethernet network is up.
The link to an Ethernet network is down.
On The Gigabit port is negotiating in full-duplex mode. FDX
(Gigabit ports)
Amber
Off The Gigabit port is negotiating in half-duplex mode and no collisions are
occurring.
GBIC Slots
LNK Green On The link to this port is up.