My router was 'up' but the ADSL wasn't. It kept trying to connect though and all lights were green.
I re-booted the router at 2 and 3 hour intervals and then I kept checking the router stats and it was always showing a brief period of connectivity ranging between seconds and a few minutes: sometimes 'connected' others ''connect', then it showed as 'down' late afternoon. I clicked on connect and was very surprised that it immediately did! Brilliant.
After checking everything this morning, I did ring tech services and eventually got through - very patient and explained all that they knew at that time.
Was so glad to have it back!