Table 7. Quick tips for troubleshooting (Continued)
Possible SolutionProblem
Make sure that the Ethernet cable is securely plugged in.You cannot connect over an
Ethernet cable to the modem.
Make sure that your computer or device does not use a static IP address but is
configured to receive an IP address automatically with DHCP.
Verify Normal Behavior With the LED Bars
When you turn on the power on the modem, the Power LED bar, Signal Strength LED bars, and LAN LED
bar light as described here:
1.
When power is first applied, the Power LED bar lights solid amber.
2.
After approximately 12 seconds, the LAN LED bar lights solid green and then goes off again.
3. After approximately 15 seconds, the following occurs:
• If the Gigabit Ethernet port is connected to a device over an Ethernet cable, the LAN LED bar lights
solid green.
•
If the modem detects mobile broadband coverage, the Signal Strength LED bars indicate the
quality of the coverage when the modem is connected to a LTE, 4G, or 3G mobile broadband service.
Five green bars indicate the strongest signal. One green bar (that is, the shortest bar) indicates the
weakest signal.
• The Power LED bar lights solid green.
Troubleshoot With the LED Bars
The following table describes error conditions that are indicated by the LED bars.
Alerts and Troubleshooting
84
LTE Modem LB1120 and LB1121
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