We had our modem delivered to our place. It's FTTB.  The instructions say if no NTU box was delivered, plug the dsl line into the phone line. Tried this and DSL light is on but no internet. There was an NTU box left in the apartment which is connected via the coax cable to the wall socket. Tried this and the NTU box shows the online light flashing however connecting it via ethernet to the modem again shows no internet light on!  Please help!  ... View more