TSI Instruments 8145-CEOD, Operation And Maintenance Manual

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10 Chapter 2
Determining Cellular Modem Status
Power LED:
The power LED is located on the bottom left corner of the front panel,
just under the power connector:
Figure 12 : Power LED
Action Description
LED turned ON Router is powered up
LED turned OFF Router is not powered up
Connection Status LEDs:
The connection status LEDs are located between the power
connector and the signal strength indication LEDs:
Figure 13 : Connection status LEDs
The LED displays the router's current connection state and network
type among a few other things:
Action Description
2G, 3G and 4G LEDs blinking
every 1 second No SIM or bad PIN
Blinking from 2G LED to 4G
LED repeatedly SIM holder is not inserted or access to
network is denied