External Backup Power Supply Connector; Front Panel Leds; Table 2 Front Panel Leds - ZyXEL Communications ZyXEL Dimension ES-4024 User Manual

To connect the power to the ES-4024A, insert the female end of power cord to the power
receptacle on the rear panel. Connect the other end of the supplied power cord to a
100~240VAC/1.5A power outlet. Make sure that no objects obstruct the airflow of the fans.

3.2.2 External Backup Power Supply Connector

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.

3.3 Front Panel LEDs

The LEDs are located on the front panel. The following table describes the LEDs on the front
panel.

Table 2 Front Panel LEDs

LED
S1
S2
PWR
SYS
ALM
LNK/ACT
(Ethernet
ports)
FDX/COL
(Ethernet
ports)
Chapter 3 Hardware Overview
COLOR STATUS DESCRIPTION
Green Blinking The system is transmitting/receiving through the stacking port.
On The link through the stacking port is up.
Off The link through the stacking port is down.
Green On The system is turned on.
Off The system is off.
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.
Red On There is a hardware failure.
Off The system is functioning normally.
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.
Amber Blinking The Ethernet port is negotiating in half-duplex mode and collisions
are occurring; the more collisions that occur the faster the LED
blinks.
On The Ethernet port is negotiating in full-duplex mode.
Off The Ethernet port is negotiating in half-duplex mode and no
collisions are occurring.
ES-4024A User's Guide
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