Top Panel With Status LEDs
The modem displays status LED bars on the top panel.
Figure 3. Modem top view with LED bars
The following table describes the LED bars and icons from left to right.
Table 2. LED descriptions (normal behavior)
Description
Icon or LED Bars
Designation
Solid green bar. The modem is receiving power and is connected to the Internet.
The type of Internet connection (wireline or broadband) depends on the failover
detection setting. By default, this setting is wireline broadband with automatic
failover support to mobile broadband. (For more information, see
on page 20.)
Blinking green bar. The modem uses mobile data because the wireline
connection is down and the modem failed over to the backup Internet connection
over the mobile broadband network.
Solid amber bar. The mobile broadband connection is down. The modem is not
connected to the Internet and no failover connection is available.
Blinking amber bar. A SIM card is not installed or not correctly installed, the
modem is overheating, or another system error occurred. For more information,
see
Troubleshoot With the LED Bars
on page 87.
Off. The modem is not receiving power.
Power
Solid green bar or bars. The five LED bars indicate the signal strength of the
mobile broadband service that the modem is connected to. Five green bars indicate
the strongest signal. One green bar (that is, the shortest bar) indicates the weakest
signal.
Off. The modem is not connected to a mobile broadband service.
Signal Strength
Solid green bar. The Gigabit Ethernet port is connected to a powered-on LAN
device.
Off. The modem does not detect a powered-on LAN device.
LAN
Introduction and Hardware Overview
11
LTE Modem Model LB2120
