ES-3124 Series User’s Guide
Chapter 3 Hardware Overview 53
3.3 LEDs
The following table describes the LEDs.
Table 3 LEDs
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.
Amber Blinking The system cannot get power from the backup power supply.
PWR Green On The system is turned on.
Off The system is off.
SYS Green Blinking The system is rebooting and performing self-diagnostic tests.
On The system is on and functioning properly.
Off The power is off or the system is not ready/malfunctioning.
ALM Red On There is a hardware failure.
Off The system is functioning normally.
Ethernet ports (ES-3124 and ES-3124-4F only)
LNK/ACT Green Blinking The system is transmitting/receiving to/from a 10 Mbps Ethernet
network.
Amber Blinking The system is transmitting/receiving to/from a 100 Mbps Ethernet
network.
On The link to a 100 Mbps Ethernet network is up.
Off The link to an Ethernet network is down.
FDX Amber On The Gigabit port is negotiating in full-duplex mode.
Off The Gigabit port is negotiating in half-duplex mode and no
collisions are occurring.
Ethernet ports (ES-3124PWR only)
LNK/ACT Green Blinking The system is transmitting/receiving to/from a 10 Mbps Ethernet
network.
On The link to a 10 Mbps Ethernet network is up.
Amber Blinking The system is transmitting/receiving to/from a 100 Mbps Ethernet
network.
On The link to a 100 Mbps Ethernet network is up.
Off The link to an Ethernet network is down.
PoE Amber On The switch is supplying power to the connected device that
supports PoE.
Off No device is connected to this port or the switch is not supplying
power via the Ethernet cable.
100Mbps SFP ports (ES-3124F only)
LNK Amber On The port has a successful connection.
Off No Ethernet device is connected to this port.
ACT Amber Blinking The port is receiving or transmitting data.