1. Check if the power supply of the equipment is stable (if the indicator light is on);

2. Confirm whether the SIM card is overdue and whether it is securely plugged in and out;

3. Log in to Xiaoxingyun Manager to check the device's last online status and alarm logs;

4. If locally accessible, enter the web interface → [Status → Network Status], check if the cellular/wired network connection is normal, restart the device and retry.