4-8
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.
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