57
LED Status
Description
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
Very strong 4G signal (RSSI
≥
–75 dBm)
Three green LEDs on
Strong 4G signal (–85 dBm
≤
RSSI < –75 dBm)
Two green LEDs on
Weak 4G signal (–95 dBm
≤
RSSI < –85 dBm)
One green LED on
Very weak 4G signal (–110 dBm
≤
RSSI < –95 dBm)
Four yellow LEDs on
Very strong 2G/3G signal (RSSI
≥
–75 dBm)
Three yellow LEDs on
Strong 2G/3G signal (–85 dBm
≤
RSSI < –75 dBm)
Two yellow LEDs on
Weak 2G/3G signal (–95 dBm
≤
RSSI < –85 dBm)
One yellow LED on
Very weak 2G/3G signal (–110 dBm
≤
RSSI < –95
dBm)
Four LEDs off
Unavailable network (RSSI < –110 dBm)
2.4G WLAN status
LED
Steady green
A 2.4G WLAN link is present.
Flashing green
Data is being received or transmitted on a 2.4G
WLAN link.
Off
No 2.4G WLAN link is present.
5G WLAN status LED
Steady green
A 5G WLAN link is present.
Flashing green
Data is being received or transmitted on a 5G WLAN
link.
Off
No 5G WLAN link is present.
CNDE LED
Steady green
A link is present between the router and another
device, but data encryption is not performed.
Flashing green (8 Hz)
Date is being encrypted.
Off
No power is input or no data is being encrypted.