Hi Folks.
Thank you for your replies. Now I know I am not alone with that Problem.
I will build a vanilla 2.6.31 - that should contain the latest mISDN
drivers.
I hope that will fix it.
From one BS11 i definitly know that it is out of sync. This problem
will be
fixed with a rubidium frequency source soon. (I will write down a howto
when i done it successfull).
I will keep you posted.
regards.
Philipp