4-8
LED
Status
Description
Flashing yellow (1 Hz)
The SDRAM has failed the self-test.
Flashing yellow (8 Hz)
The extended segment does not exist.
Steady yellow
The system software image does not exist.
Off
No power input, or exceptions have occurred.
VPN status LED (VPN)
Steady on
A minimum of one IPSec VPN tunnel is present.
Off
No IPSec VPN tunnel is present.
GE port green LED
and GE port yellow
LED
Steady green
A 1000 Mbps link is present.
Flashing green
Data is being received or transmitted at 1000 Mbps.
Steady yellow
A 10/100 Mbps link is present.
Flashing yellow
Data is being received or transmitted at 10/100 Mbps.
Both LEDs off
No link is present.
FE port LED (FE0
through FE3)
Steady green
A 10/100 Mbps link is present.
Flashing green
Data is being received or transmitted at 10/100 Mbps.
Off
No link is present.
Micro SD card LED
Steady green
The Micro SD card is present and has passed the
test.
Off
No Micro SD card is inserted or the Micro SD card is
installed incorrectly.
LTE LED
Steady green
A 4G link is present.
Flashing green (8 Hz)
Data is being received or transmitted on a 4G link.
Steady yellow
A 3G link is present
Flashing yellow (8 Hz)
Data is being received or transmitted on a 3G link.
Off
No 3G/4G link is present or no 4G modem is installed.
SIM card slot LED
(SIM0 and SIM1)
Steady green
A SIM card is present.
Flashing green (1 Hz)
The SIM card is being used for dial-up.
Flashing green (8 Hz)
The 4G port for the SIM card is sending or receiving
data.
Steady yellow
The SIM card is faulty.
Off
No SIM card is present, or the 4G module is not
present or is being initialized.
Signal strength LEDs
Four green LEDs on
Excellent 4G signal strength.
Three green LEDs on
Good 4G signal strength.
Two green LEDs on
Fair 4G signal strength.
One green LED on
Poor 4G signal strength.
Four yellow LEDs on
Excellent 2G/3G signal strength.
Three yellow LEDs on
Good 2G/3G signal strength.
Two yellow LEDs on
Fair 2G/3G signal strength.
One yellow LED on
Poor 2G/3G signal strength.
