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Chapter 1 Introduction
LTE3311 Series User’s Guide
16
1.8 LEDs
Figure 1 Front Panel
The following table describes the LEDs.
Table 1 Front panel LEDs
LED COLOR STATUS DESCRIPTION
Power Green On The LTE3311 is receiving power and functioning properly.
Blinking The LTE3311 is in the process of starting up or default restoring.
Off The LTE3311 is not receiving power.
Internet Green On The LTE3311’s WAN connection is ready.
Blinking The LTE3311 is sending/receiving data through the WAN.
Off The WAN connection is not ready, or has failed.
LTE Green On The LTE3311 is registered and successfully connected to a 4G
network.
Blinking The LTE3311 is looking for an available 4G network.
Off There is no SIM card inserted, the SIM card is invalid, the PIN
code is not correct or there is no service.
3G/2G Green On The LTE3311 is registered and successfully connected to a 3G/
2G network.
Blinking The LTE3311 is looking for an available 3G/2G network.
Off There is no SIM card inserted, the SIM card is invalid, the PIN
code is not correct or there is no service.
LTE Signal
Strength
Green On A valid SIM card is inserted and the wireless WAN interface is
enabled.
Three bars:
Signal strength: Excellent
RSRP (Reference Signal Receiving Power) >= -79 dBm
Two bars:
Signal strength: Fair
-81 dBm >= RSRP >= -95 dBm
One bar:
Signal strength: Poor
-97 dBm > RSRP
Red Blinking There is no LTE signal because there is no valid SIM card
inserted and/or the wireless WAN interface is disabled.
Power
PHONE
Internet
WLAN/WPS
LTE
LTE Signal
Strength
USB
3G/2G
16


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