Grundig GD-RT-AC3016N User Manual page 165

You can also check the network status and quick set the network parameters in this
interface.
Step 1 Go to Menu > Maintenance > Net Detect > Network Detection.
Step 2 Click Status on the right bottom of the interface.
If the network is normal the following message box pops out.
If the message box pops out with other information instead of this one, you can click
Network button to show the quick setting interface of the network parameters.
Checking Network Status
Network Status Checking Result
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