8.9.2 Troubleshooting Modem Issues
(1) Communication Issue with 4G Module
Symptom: On the Modem Management page of the WebUI, SIM Card
status shows "Not Inserted" and the Log only displays "-> AT".
Figure 45
Analysis: Failure in communication between the main control and the
module.
Solution: Try power cycling the device. If the issue persists, the 4G
module may be damaged or there could be a circuitry issue, requiring
replacement of the 4G module board.
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