TRB140 LEDs

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This page contains information the different types of LEDs and their behaviour on a TRB140 device.

Power LED

The power LED is located on the bottom left corner of the front panel, just under the power connector.

Networking trb140 manual leds power led.png

It indicates whether the device is powered on or not.

State Description
LED turned on Device is powered on.
LED turned off Device is not powered on.

Ethernet port LEDs

There are two LEDs located at the top of each Ethernet port.

Networking trb140 manual leds ethernet leds.png

They provide information on the current states of the Ethernet ports. Each port has two LEDs:

  • Orange - 10/100 Mbps connection
  • Green - 1000 Mbps connection

Below is an explanation on the behaviours of green and orange LEDs.

State Description
LED on A data connection on the port is operational (cable plugged in, end device visible, no data is being transferred).
LED off No data connection on the port is operational (no cable, bad cable or end device not visible for some other reason (such as damaged network card)).
LED blinking Connection established and data is being transferred over this port.

Mobile network type LEDs

The mobile network type LEDs are located near the SIM card slot.

Networking trb140 manual leds mobile network type leds.png

They display which type of Internet connection is currently active.

Action Description
2G LED turned on Device is connected to a 2G network.
3G LED turned on Device is connected to a 3G network.
4G LED turned on Device is connected to a 4G network.
2G blinking Device is connected to a 2G network but hasn't received an IP address.
3G blinking Device is connected to a 3G network but hasn't received an IP address.
4G blinking Device is connected to a 4G network but hasn't received an IP address.
2G, 3G & 4G LEDs blinking at the same time every 500 ms No SIM card or incorrect PIN.
2G, 3G & 4G LEDs turns on and off in a sequence one after the other The device is attempting to connect to a mobile network operator.

Mobile signal strength indication LEDs

The mobile signal strength indication LEDs are located near the SIM card slot.

Networking trb140 manual leds mobile signal strength leds.png

The number of lit up LEDs represents a different mobile signal strength (RSSI) value in dBm.

No. of lit up LEDS Signal strength
0 ≤ -111 dBm
1 -110 dBm to -97 dBm
2 -96 dBm to -82 dBm
3 -81 dBm -67 dBm
4 -66 dBm to -52 dBm
5 ≥ -51 dBm