Thank you lizzy555, this solved my NTP issue

But the DAP-1522 isn't a good WLAN AP...I have to say that myold DI-524 Router with optional 5db Antenna was far better...I still have some issues with DAP-1522...but this is stuff for a second thread

. Only thing up to now which I really like in DAP-1522 is the timebased activation / deactivation of radio which is really cool.