(AX-3.2and later) ExtDeviceData is a frozen container slot under any LonDevice that uses “Extended Network Management,” as defined in CEA-709.1-B (replacing the more typical DeviceData slot). Like DeviceData, it represents the device’s state and configuration data, including the larger number of possible address tables in its child ExtAddressTable slot (unique to ExtDeviceData).

For general information, see DeviceData.