Sorry - crossed lines.

I was replying specifically to the FTTC side of it, as in the quote I gave, and why the 20Mbps setting is OK as pointed out in the OP.

I agree there is an intermittent bug whereby a rise in the BTW IP Profile doesn't always get picked up. I believe it does pick it up in most cases.

I would stress that the bug is almost certainly in the BTW notification system,(failing to issue the update to the ISP), not Plusnet's treatment of it. I say this because it used to be a frequent occurrence on Entanet connections in the days when there were large numbers of such. I think I recall it happening on AAISP as well.

As to the earlier comment by someone about the update failure only seeming to affect profile increases, my opinion is that is because it would be very unusual for anyone to check the PN line rate to see if it had followed a BTW drop,so it could very well be failing in the same way. Just no-one spots it.

Though again, I'm sure I've seen a few posts over the years where someone has done so, and had a line rate above both the sync and the BTW IP Profile.

My SNR is locked, so I don't think it does change

How did you manage that ? Used to be do-able on 20cn, but you are on 21.....

Trial of some sort. Whatever happens when I reboot the target SNR is 3.0dB. However, my line length means that if I reboot in quiet times the sync is around 16000k, but when things get busy (either the nation's networks or Plusnet's, I can't tell which) the line will drop and re-sync around 15500k. That seems to be my stable 3.0dB speed.

I can get 13 Meg between midnight and midday, but only 12.5 Meg between midday and midnight (line drop times vary).

No big deal though. 2.2 (ish) kms from the exchange.

Is this something Plusnet informed you of ? If not, then it will just be DLM recognising a nice stable circuit, and cranking the speed as high as poss. Usually come across these as faults when some businesses Cisco router just can't hang on at 3db.

My old 8128 circuit was hard pinned to a 6db fast path profile (have a friend in the know). I was glad I jumped from that to 40/10, as BTw up to 20 service is finicky, at best.

Setting the target SNRM isn't the same thing as having a fixed SNRM . The nearest thing to that is SRA, or the range mechanism in DMT. Or as Zarjaz said, it could be set higher than 6dB on IPStream. On WBC I think there is just standard, stable, and superstable.

You had Zarjaz and me confused there .

Edited by RobertoS (Sun 08-Jul-12 12:53:08)

In reply to a post by Zarjaz:

Is this something Plusnet informed you of?

Yes. The faults guy that helped me with my sync and snr monitoring was keen to lock at 6dB, but I pushed him that bit farther and jumped from 11.5 to 12.5 Meg.

Within the last few days they have made a change that seems to have significantly improved thins.

However...

A side affect is that speeds of users trialling the FTTC 80/20 service are being restricted to 40 Mbps!

Yike!
http://www.speedtest.net/result/2059895708.png

Tried the BT tester to check IP Profile but it doesn't actually upload anything, according to NetWorx, and hangs on the Testing page. So can't see the IP Profile. NetWorx showed the same speed as speedtest.net.

They've updated all the "Current Line Speed"s. I was on the fiddled 20Mbps, it's now 40Mbps.

Edited by RobertoS (Thu 12-Jul-12 18:02:22)

Raised in the Plusnet forums

In reply to a post by jelv:

A side affect is that speeds of users trialling the FTTC 80/20 service are being restricted to 40 Mbps!

Well, not all of them, mine has stayed as it should be, but it is certainly the major topic on the Fibre trials forum today!