Very interesting.

We moved to BT's new Cloud system on 23rd January. The broadband works well. However, my business phone returns a 'number unobtainable' tone if called. I have been without a business line for over five weeks. Despite numerous calls to BT I have had no convincing explanation. The call centre staff just say where the complaint is being dealt with. BT appear unable to put a 'number unobtainable due to fault on the line' message in place.

Is anyone else is having similar problems?