This afternoon's short outage was due to the server being rebooted as MS-Windows security patches were applied.
Due to how Windows and Windows Server is designed, the software often needs to be rebooted to make recent patches become live.
I expect about 1hr a month of outage as Windows patches are applied. I don't know exactly how long the server was off before I received reports of the issue. But by the time I'd walked to the car park, driven the 4miles home, parked the car and booted up a PC here, things were coming back.
I normally wait at least an hour before I file a fault ticket with the hosts simply to allow patches and reboots to occur. By all means, continue to notify me as soon as you spot problems but due to the number I receive I probably wont reply.
Now to find out why the SMS server decided to " go on strike in sympathy" at the same time.