How to troubleshoot if the InDTU324 fails to connect to the application center?
1. Check the SIM card: Ensure it’s properly inserted (power off first), not expired/arrears, and detected by the device (SIM LED stops blinking). 2. Verify signal strength: Move the device to a location with stronger cellular signal (CSQ ≥8 for stable communication). 3. Confirm dial parameters: Check APN, username, and password in [Configurations > Dial Parameters Setting] — they must match your carrier’s requirements. 4. Validate center settings: Ensure the application center’s IP/domain and port are correct (no typos). 5. Check link maintenance: Enable ICMP detection (set ICMP host to the center’s IP) to monitor network connectivity; disable link maintenance if conflicting. 6. Reboot the device: A soft restart can resolve temporary network glitches.