Digi 6350-SR User Manual page 51

Troubleshooting
Digi 6350-SR/6355-SR LTE Router User Guide
Power off the Digi 6350-SR/6355-SR, swap the antennas on the
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back of the Digi 6350-SR/6355-SR, and power on the Digi 6350-
SR/6355-SR. If this resolves the connectivity and there are two
or more bars of signal strength, this may indicate that one of the
antennas is faulty. You can continue to use the Digi 6350-
SR/6355-SR, but we suggest that you eventually order a
replacement set of antennas to improve signal strength even
further.
If swapping the antennas did not resolve the issue, verify the
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SIM card is inserted properly. Power cycle the Digi 6350-
SR/6355-SR after re-insterting the SIM card. Wait 30 to 60
seconds. If the problem persists, the unit cannot detect the SIM
and the Digi 6350-SR/6355-SR may need to be replaced.
Flashing Blue or Green
Digi 6350-SR/6355-SR is connected to the 3G/LTE network, but doesn't
see anything connected to its Ethernet port. Check the Ethernet port,
verify the client device (router, laptop, etc.) is connected via CAT5/6 to
the Digi 6350-SR/6355-SR, and the Ethernet port on the client device is
enabled
LTE troubleshooting tree
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