Grundig GD-RT-AC3016N User Manual page 199

Step 2 Select the restoring type from the following three options.
Restore Defaults: Restore all parameters, except the network (including IP address,
subnet mask, gateway, MTU, NIC working mode, default route, server port, etc.) and
user account parameters, to the factory default settings.
Factory Defaults: Restore all parameters to the factory default settings.
Restore to Inactive: Restore the device to the inactive status.
Step 3 Click the OK button to restore the default settings.
Note:
The device will reboot automatically after restoring to the default settings.
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