Draytek VIGOR2925 SERIES User Manual page 541

After finishing all the settings here, please click OK to save the configuration.
Disable – Related settings will not be applied to VigorAP.
Enable – Above settings will be applied to VigorAP after
clicking OK to save the configuration. If such feature is
enabled, you have to type the password for accessing
VigorAP.

AP Password – Type the password of the VigorAP
that you want to apply Vigor2925's TR-069 settings.
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Vigor2925 Series User's Guide