I had FTTC enabled on the 20th August, but had a couple of times where it's ground to a halt and tonight I rebooted both the modem and the router (DGND3700), the previous time I think I just rebooted the router.
Rebooting the modem seems to require a reboot of the router, IIRC I've rebooted the modem, once tonight and once Thursday night when I changed the power supply, otherwise I've left it on - don't wish to upset the DSlam
I was playing Crysis 2 until about 20:50 tonight and all was well, came back about 22:00, shortly after pages started timing out, looking in the modem I still appeared to be connected ok, but the FEC errors had shot up.
I was still able to send a simple email to my phone from my PC as a test, but I had to turn wireless off on my phone for it to receive (via cell data), so it seems data was able to get through but not enough to browse the web. All my PC's are hard wired with Gigabit Ethernet, only the phones/tablets use wireless.
Here's my ping graph
and link to the last 24 hour log graphs
I've also uploaded 7 day log graphs
And I was slightly disappointed to only get about 50 meg, BT estimate was 57 so was hoping for more, I'm about 450 meters from the cabinet.