Mark wrote:
[color=blue]
> I get Number Unobtainable when calling from a BT line and a Voipfone
> line to my 5-digit FWD number (prefixed by zero).[/color]

Can you call +43 780 393393 000000 from your BT line and post the
results? You should hear an announcement telling you how many
extension digits were transmitted by the network.