So not "in no way locked" as you said before. Obviously it could be locked because it had been for me and many others.

I wonder if my cab is now using the 17a profile that a few others are seeing and that is what caused the sync rate reset.

"in no way locked" by default. Only a system or engineer intervention would cause the line to be capped on a particular sync/profile. Bt default it will vary.

No, the others who have reported this would seem to be using a Fritzbox modem router which is incorrectly reporting the VDSL profile.

So definitely possible it was locked then, I'd love to know why the maintenance caused it to drop and be locked.

It could be correct though?

I just rebooted the modem and it gave no improvement. Don't know what that means though, the line can no longer support a higher IPProfile or it's been locked or something else. Really missing line stats.

It's gone pear shaped again.

Throughput has dropped to 32.8 Mbps and latency gone up to 19ms, router uptime is 6 days, 18:08:54 and IP Profile still 37585.

It's the same situation as the first time speed dropped after the maintenance, this time no maintenance just inexplicable performance loss.

Performance up untill a few hours ago.
And now.

BT speedtest back on the 4th. Strangely throughput is higher than IP Profile.
BT speedtest just now.


So looks like the sync rate has been capped again. The line has been stable, with no disconnects and steady consistent throughput.

Any ideas what the hell is going on and what should I do now?

Edit, The speed seems to have dropped at midnight, could this be my ISP imposing a cap rather than the DLM?

Edited by deleted (Fri 09-Sep-11 01:36:27)

IP Profile now is the same as on the 4th. That suggests the slowdown is ISP-related. Nothing to do with a sync speed cap.

So what to do now presuming that is the case?

Surely ISP-related loss of performance has always been with us?

Monitor when speeds are good and bad for a few days, including a couple of weekends to see if there is the pattern we are used to on ADSLx. If that pattern emerges then I'm right. If it doesn't then in this case I am crying wolf. I hope the latter!

Only the technology between us and the exchange has changed, not the fundamentals of average bandwidth provision per customer.

That I expect has increased to some extent in anticipation of demand, or might increase in response to demand, but it will certainly never go away. Unlimited bandwidth at consumer prices with no consequential drawbacks is unsustainable.

Edit - The question of the IP Profile itself having fallen is something a few people have seen, and the theory is that it is increased cross-talk caused by increased take-up. As with ADSLx, a single modem power-cycle during daylight hours would be a good idea.

Edited by RobertoS (Fri 09-Sep-11 08:47:59)