The situation is: we have a BT Decor 1300 caller display phone which happens to have a button labelled 1571; the idea being that when you have messages left the button flashes to let you know.
The problem is: we are connected to a VM line but don't have any kind of voicemail connected (free or otherwise) but the button flashes after every incoming call for what seems like hours, and it's driving the missus mad, and she in turn is giving me grief because she thinks that having worked for BT for 25 years I'm some kind of expert on phones
And the soloution is: please feel free to let me know so that both our sanities can be preserved!!