@David-TP Hi David, Thx for your quick reply.. As additional information.. I did not buy the nx510v from my ISP or any other ISP. - I bought from Amazon directly, and therefore it would surprice me...

There is no "Telephony" menu availiable under the "Advanced" menu in the top and/or menu. This is what my overview shows.. I would here expect to phone availiability, but maybe I am wrong.. NB. I...