No Internet -see also here:
It seems i have found the mistake-probably wrong MAC-Adresse installed by Provider on new Icotera i6800(i6806-00) router.
Last Digit is 4c on the console
On the Label send with router last Digit is 4A
We will see tommorow.
Tried in slower winxp-machine. Signal came hardly to the PC.
On newer Asrock AliveDual eSata2(this one), i could make a Connection but only reaching administrative console.

Still no Internet with winxp.
Will now test in win7-64 ultimate.
btw: sim-router which i am actually using not working on win 7-pc when in usb-external case.
will get 5gb-limit stick which will cost 30chf/month. we will see how quick.
Happy New Year and many thanks for all your helpers.