ZyXEL Communications ONU-2024 Series, User Manual

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Chapter 3 Hardware Connections
ONU User’s Guide
43
3.4 LEDs
The following table describes the LEDs located on the front panel.
Table 2 LEDs
LED COLOR STATUS DESCRIPTION
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 The HTP mode test failed.
Off The system is functioning normally.
Ethernet Ports
LNK/ACT Amber Blinking The system is transmitting/receiving to/from a 10/100 Mbps
Ethernet network.
On The link to a 10/100 Mbps Ethernet network is up.
Off The link to an Ethernet network is down.
FDX/COL 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.
Gigabit Port
100/1000 Green On The link to a 1000 Mbps Ethernet network is up.
Amber On The link to a 100 Mbps Ethernet network is up.
Off The link to an Ethernet network is down.
ACT Green Blinking The port is receiving or transmitting data.
On The port has a connection to an Ethernet network but not
receiving or transmitting data.
Off The link to an Ethernet network is down.
Mini-GBIC Port
LNK Green On The port has a successful connection.
Off No Ethernet device is connected to this port.
ACT Green Blinking The port is sending or receiving data.
Off The port is not sending or receiving data.
GEPON Uplink Port
LNK Green On The port has a successful connection with the OLT.
Blinking The port is attempting to establish a connection with the OLT.
Off No fiber optical cable is connected to this port or the link is down.
ALM Red Blinking No reception of optical signal or receiving an optical signal but
there is an error.
Off The system is functioning normally.