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ES-3148 User’s Guide
Chapter 3 Hardware Overview 43
The backup power supply constantly monitors the status of the internal power supply. The
backup power supply automatically provides power to the switch in the event of a power
failure. Once the switch receives power from the backup power supply, it will not
automatically switch back to using the internal power supply even when the power is resumed.
3.2 Panel LEDs
The following table describes the LEDs on the panels.
Table 2 Front Panel 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.
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.
10 Green Blinking The system is transmitting/receiving to/from an Ethernet device.
On The port is connected at 10Mbps.
Off The port is not connected at 10Mbps or to an Ethernet device.
100 Amber Blinking The system is transmitting/receiving to/from an Ethernet device.
On The port is connected at 100Mbps.
Off The port is not connected at 100Mbps or to an Ethernet device.
Uplink Gigabit Port
1000 Green Blinking The system is transmitting/receiving to/from an Ethernet device.
On The port is connected at 1000Mbps.
Off The port is not connected at 1000Mbps or to an Ethernet device.
100 Amber Blinking The system is transmitting/receiving to/from an Ethernet device.
On The port is connected at 100Mbps.
Off The port is not connected at 100Mbps or to an Ethernet device.
GBIC Slots
LNK Green On The port has a successful connection.
Off No Ethernet device is connected to this port.
ACT Green Blinking The port is receiving or transmitting data.
Gigabit Port