When I first got FTTC, BT reckoned that the line would only support 10.7Mb/sec down, 1Mb/sec up for every line connected to the cabinet. Even the house it stood outside. They would not accept that this was clearly wrong.
Because of the low speed estimate, Zen would not provide FTTC service, so I had to go to a different ISP, who could only put me on a 40down, 2 up connection because of the BT speed estimate.
The line initially synced at 39.8 down, 7 up. After a few months, as the cabinet filled and crosstalk grew, it slowed to 33 down, 6.7 up.
Attempts to get OpenWoe to see sense only resulted in them telling the ISP that the speed would drop to 10.7 /1 and they should 'manage their client's expectations'.
The speed did not drop, of course.
After a year or so, the BT suddenly and silently estimate changed to 25 down/ 5 up and I finally managed to get switched to a 40down/10 up deal, so I was no longer restricted to 1.7 up.
But it was stuttery with high latency and random pauses. Lots of DNS issues.
Because the estimate was finally more than 12Mb/sec, I finally managed to switch to Zen. Same hardware, same sync, but a MUCH faster, smoother connection.
Over the past few months the actual down sync has risen a couple of Mb/sec and the upload just a little to 8Mb/sec. I've no idea why!
There was a huge difference as a result of switching to Zen. I have had a SamKnows monitoring box running on the connection and looking back over the graphs, I can see the dramatic improvement on the day of the switch to Zen.
[Later]
Here's a chart of the jitter I don't think it is too hard to work out when I switched to Zen!
Edited by hoopla (Sun 21-Jun-15 22:38:58)