ZyXEL Communications ES-3124 - Manual (Page 42)

Chapter 3 Hardware Overview
ES-3124 Series User’s Guide
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4 Connect one end of a power wire to the Switch’s -48V (input) pin and tighten the captive
screw.
5 Connect the other end of the power wire to the negative terminal on the power supply.
6 Insert the terminal block plug in the Switch’s terminal block header.
3.3.3 External Backup Power Supply Connector
The Switch supports external backup power supply (BPS).
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.
3.3.4 Powering on the Switch
1 Turn on the power supply first.
2 Move the Switch power switch to the ON position.
3.4 LEDs
The following table describes the LEDs.
Table 3 LEDs
LED COLOR STATUS DESCRIPTION
BPS Green Blinking The Switch 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 Switch is turned on.
Off The Switch is off.
SYS Green Blinking The Switch is rebooting and performing self-diagnostic tests.
On The Switch is on and functioning properly.
Off The power is off or the Switch is not ready/malfunctioning.
ALM Red On There is a hardware failure.
Off The Switch is functioning normally.
Ethernet ports (ES-3124 and ES-3124-4F only)
LNK/ACT Green Blinking The Switch is transmitting/receiving to/from a 10 Mbps Ethernet
network.
On The link to a 10 Mbps Ethernet network is up.
Amber Blinking The Switch 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 port is negotiating in full-duplex mode.