# 4G Modem The **4G modem** on the CloudBox provides reliable connectivity for data transmission, ensuring that the system can operate even in remote locations without Ethernet or WiFi networks. In this article, we’ll explore the technical details of the CloudBox's 4G modem, its possible statuses, cellular protocols, and how to configure the SIM PIN. ## 4G Modem Overview The CloudBox uses a **SIM7600G-H 4G MODEM** to provide 4G connectivity. This modem allows the CloudBox to connect to the internet via a **SIM card**, enabling remote communication and the ability to send race timing data to the Cloud. ### **Key Features:** * **GNSS Receiver**: Supports GPS/Beidou/GLONASS/GALILEO/QZSS for precise positioning. * **Cellular Protocols**: LTE CAT-4 4G / 3G / 2G support. * **LTE Bands**: * LTE-FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66 * LTE-TDD: B34/B38/B39/B40/B41 * **Data Rate**: * LTE Cat-4: Up to 50Mbps (Uplink) / Up to 150Mbps (Downlink) * 3G (HSPA+): Up to 5.76Mbps (Uplink) / Up to 42Mbps (Downlink) * **SIM Card Slot**: 2FF (Mini SIM: 25 x 15 x 0.76 mm) supporting 1.8V/3V SIM cards. * **Antenna Connectors**: LTE main antenna + GNSS antenna for cellular and GPS communication. ## 4G Modem Statuses The 4G modem operates through a series of statuses that indicate its connection state and operational health. These statuses can help diagnose issues and ensure the modem is functioning properly. 1. **STARTING**: The modem is initializing and preparing for operation. 2. **AT\_OK**: The modem has been detected and is functioning correctly. 3. **RESET\_OK**: The modem has successfully reset and is searching for a SIM card. 4. **IMEI\_OK**: The modem's IMEI (International Mobile Equipment Identity) has been verified. 5. **READY**: The SIM card is ready, and the modem is prepared to connect to the cellular network. 6. **SIM\_PIN**: The SIM card requires a PIN to unlock. 7. **SIM\_PUK**: The SIM card requires a PUK (Personal Unblocking Key) to unlock. 8. **PH\_NET\_PIN**: A custom network PIN is required to connect. 9. **UNKNOWN**: The modem is in an unknown state. 10. **READY\_PIN**: The correct SIM PIN has been entered, and the modem is ready. 11. **NETWORK\_STATUS**: The network status has been successfully obtained. 12. **SIGNAL\_STRENGTH**: The modem has measured the signal strength. 13. **CONNECTING**: The modem is connecting to the network operator. 14. **CONNECTED**: The modem is connected to the network and is operational. 15. **DISCONNECTED**: The connection has ended, and there is no service. 16. **CME\_ERROR**: A modem error has occurred; check the error description for more details. 17. **SIM not inserted**: The SIM card is missing or not inserted correctly. 18. **SIM failure**: There is an issue with the SIM card. 19. **SIM busy**: The SIM card is busy with another operation. 20. **SWIM wrong**: The wrong SIM card has been inserted. 21. **Incorrect password**: An incorrect password or PIN has been entered. ## Network Status and Signal Strength The **Network Status** provides real-time feedback on the cellular connection. Depending on your environment or SIM card, the CloudBox may report one of the following statuses: * **0**: No service (only emergency calls are possible). * **1**: Full service (normal operation). * **2**: Reserved for future use. * **3**: Registration denied (the network rejected the connection attempt). * **4**: Unknown status (the device is out of coverage). * **5**: Registered, roaming (the device is connected to a network but is in roaming mode). Signal strength is expressed in **RSSI** (Received Signal Strength Indicator). A higher RSSI value indicates a stronger signal, which is important for maintaining a stable 4G connection, especially in remote locations. ## Configuring the SIM PIN The CloudBox allows users to configure the SIM PIN via the **Network Configuration** section in the interface. Once the SIM PIN is set, the CloudBox will **restart** to initialize the modem with the correct SIM information. ### **Steps to Set the SIM PIN:** 1. **Access the Network Configuration Interface**: Navigate to the **Network Configuration** section of the CloudBox dashboard. 2. **Enter the SIM PIN**: In the **SIM PIN** field, input the correct PIN for your SIM card. 3. **Save the Configuration**: Once the PIN is entered, click **Set SIM PIN** to save the configuration. 4. **Reboot**: The CloudBox will automatically reboot to apply the SIM PIN and restart the modem. ### **Important Considerations:** * After setting the SIM PIN, the modem will restart to ensure it initializes with the correct settings. * If the incorrect SIM PIN is entered multiple times, the SIM may require a **PUK** to unlock it. Contact your cellular provider if this occurs. ## 4G Troubleshooting If you encounter issues with the 4G connection, the following steps can help troubleshoot the problem: 1. **Check SIM Card Insertion**: Ensure the SIM card is inserted correctly in the **2FF Mini SIM slot**. 2. **Verify SIM PIN**: Make sure the correct SIM PIN is entered. If the wrong PIN is entered too many times, the SIM will be locked and require a **PUK** to unlock it. 3. **Check Signal Strength**: Poor signal strength (low RSSI) can prevent the modem from maintaining a stable connection. Ensure the LTE antenna is properly installed and positioned for optimal signal. 4. **Monitor Status Messages**: Use the modem status indicators to identify issues, such as **CME\_ERROR** or **SIM not inserted**, and take appropriate action based on the status. 5. #### Summary The **4G modem** on the CloudBox provides reliable cellular connectivity, ensuring the device can operate and transmit data in remote locations without WiFi or Ethernet. Understanding the various modem statuses, network conditions, and how to configure the **SIM PIN** is essential for maintaining a stable connection. By following the steps outlined in this article, you can ensure that the CloudBox remains connected and fully operational in any location with cellular coverage. ## Summary The **4G modem** on the CloudBox provides reliable cellular connectivity, ensuring the device can operate and transmit data in remote locations without WiFi or Ethernet. Understanding the various modem statuses, network conditions, and how to configure the **SIM PIN** is essential for maintaining a stable connection. By following the steps outlined in this article, you can ensure that the CloudBox remains connected and fully operational in any location with cellular coverage. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.runonrufus.com/rufus-cloudbox/advanced-operations/4g-modem.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. 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