Template:Networking trb255 manual connection status leds

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Connection status LED

The connection status LEDs are located on left side of the back panel:

[[File:{{{file_con_led}}}|{{{size_con}}}px]]

Action Description
2G, NB and M1 LEDs are blinking at the same time No SIM or bad PIN
2G, NB and M1 LEDs light up and down in sequence Searching mobile network operator
2G/NB/M1 LED blinking Gateway connected to 2G/NB/M1, no data session established
2G/NB/M1 LED turned ON Gateway connected to 2G/NB/M1 with data session
2G/NB/M1 LED blinking Gateway connected to 2G/NB/M1 and data is being transferred

* NB stands for Narrowband IoT (NB-IoT) mobile communication. M1 stands for LTE Cat M1 communications.