If the LED is not visible, then Comm may be verified using an AT Command:
Depending on the wireless network being used something similar to what is shown below will be
displayed. It is important to verify that 'Yes' values are displayed at the top for Data and Network
registration and the correct APN is displayed.
Radio Access : GSM
Network Reg. : Yes, Home
Data Reg. : Yes, Home
Connection : Yes
RSSI : -97 dBm
BER : 99
Channel : 737
Cell ID : 3441
Base Station ID : 40
Local Area Code : 31003
Network Code : 410
Country Code : 310
IMEI (Modem S/N): 351802055396182
IMSI (SIM ID) : 310410202524377
ICC-ID (SIM S/N): 89014102212025243778
Phone Number :
GPRS APN : ISP.CINGULAR
Maint. Server : maint.vehicle-
location.com(216.177.93.246):20500
Inbound Server : (0.0.0.0):20500
Dual Comm : routing id=0, log cid=0, modem type=21, inbnd
index=0
OK
If any of the responses return Not-Acquired or Not-Registered (and the APN is correct), the wireless
network operator should be contacted for further troubleshooting.
Please note that it may take several seconds (or longer) for the LMU-3030™ to communicate with the
modem and acquire the wireless network.
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