Anyone else seeing WBC oddities today?

Rik · Sep 16, 2009, 17:14:43

My target NM appears to have been dropped from 9db to 6db this morning, for the first time since the line trained on Max, and my sync speed has gone up to 4632, enough for a 4M profile, though currently I'm still at the 3.5 I was on prior to the re-sync. However, note the throughput speed - normally my line delivers whatever my profile allows.

Download speedachieved during the test was - 1595 Kbps
For your connection, the acceptable range of speeds is 600-7150 Kbps.
Additional Information:
Your DSL Connection Rate :4632 Kbps(DOWN-STREAM), 760 Kbps(UP-STREAM)
IP Profile for your line is - 3500 Kbps

It's not just the BT tester either:

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Steve · Sep 16, 2009, 17:21:04

But will it hang on at 6

Rik · Sep 16, 2009, 17:23:41

If you mean my NM, Steve, it shouldn't do. Both lines have needed a 9db margin for stability previously.

Steve · Sep 16, 2009, 17:32:32

I think I meant your noise margin

Rik · Sep 16, 2009, 17:33:42

Currently 5.8.

drummer · Sep 16, 2009, 18:07:06

My NM has been hovering around the 2.5 mark since my last resync just over a fortnight ago. Keep on expecting it to fall over but it's still hanging in there.

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Rik · Sep 16, 2009, 18:10:14

Did you note what it was immediately after the last re-sync, Drummer?

drummer · Sep 16, 2009, 18:12:21

Quote from: Rik on Sep 16, 2009, 18:10:14
Did you note what it was immediately after the last re-sync, Drummer?

Just over 6dB if I remember rightly.

Rik · Sep 16, 2009, 18:14:22

Thanks. The oddity, for me, is that BT appear to have changed the target from 9 to 6db, without the usual 2 weeks continuous connection, but at the same time, they've dropped the speed to half.

esh · Sep 16, 2009, 18:18:16

If this is the 21st century wake me up in the 22nd

On a more serious note sorry to hear about all your problems. I know the IDNet ADSL1 (ancient technology!) I have is just fine at the moment. There is some ADSL2 line up here I have in a rented place and that has massive massive outages (at peak times, like 6pm-10pm), but that's probably because it's a cr*p ISP, and I have no real numbers to compare. I'm just assuming capacity is the issue with BT right now?

Rik · Sep 16, 2009, 18:22:45

It is, Esh. They've been making a concerted effort to resolve their 'under-dimensioning' (quaint phrase) as BT Retail are launching WBC now. However, they seem to be robbing Peter to pay Paul and just moving bandwidth around.

Bill · Sep 16, 2009, 18:25:05

I don't understand this ADSL2+

I had a resync this afternoon after at least 4 weeks of continuous connection, I assume it was because the NM dropped too far. But it resync'd immediately, only marginally slower than before.

Target SNR is still 9db, and I've only once seen the actual NM drop below 6db... will an MSAN force a resync on any of the error counts? The FEC total was getting a touch high...

Rik · Sep 16, 2009, 18:35:54

I suspect MSANs are forcing re-syncs on error counts, Bill, as my margin has never dropped anywhere below about 5db.

Bill · Sep 17, 2009, 09:12:49

I can understand forcing a re-sync on high error rates if they are sustained for more than a few minutes, but any line will accumulate errors if you leave it long enough... trust BT to get it wrong again

Rik · Sep 17, 2009, 09:14:54

You can say that again. Please.

I'm still trundling along at 1700k on a 3500k profile, with a sync speed which will give me 4000k in a few days. I am not impressed with BT, it seems that every second Wednesday, they screw with my line.

Fox · Sep 17, 2009, 09:36:26

It must be your turn on their rota Rik, seems to be Tuesdays for me (could be Wednesday that the guy waters the pot plant that is sitting on the MSAN

)

Rik · Sep 17, 2009, 09:40:56

He's probably travelling around the country. We just need to find where he is on the other days now.

zappaDPJ · Sep 17, 2009, 15:43:46

It's probably a coincidence but my line has been all over the place during the last 12-24 hours. It had been quite stable but now looks as though it's going to re-sync itself to oblivion like it did before. My sync rate has dropped by 2MB/s, the noise margin has increased by 3db and actually throughput is down by around 4Mb/s.

Rik · Sep 17, 2009, 15:50:17

Maybe, but maybe not, Zap. Clearly BT are still playing around with the network.

onerob · Sep 17, 2009, 19:28:28

My sync rate has plummeted from 19k to 6k, with a throughput of about 1.4Mb.

jonathancox · Sep 17, 2009, 20:35:22

I have been suffering awful peak time throughput since Monday (40db attenuation with 9db SNR margin), on a 8000k IP profile.

WBC - IMHO - just isn't robust enough yet. My line under ADSL Max gradually synced lower and lower during 2007 and 2008, I guess due to cross talk as Max takeup increased.

I've had my MAC today from James and have just signed up for Be LLU. They are claiming I will be able to sync at 11000k, which is 2000k better than I have ever had on WBC.

A shame -it's been a great 2.5 years on Idnet on the service and support side. Shame about BT!

Rik · Sep 18, 2009, 09:59:28

I empathise, Jonathan, BT are really destroying the smaller ISPs right now.

Let us know how you get on with Be, will you?

jonathancox · Sep 18, 2009, 12:31:42

I will, of course. Migration scheduled for 28th.

Bit nervous about their Bulgarian call centre set up, but I've generally heard very good things about throughput/congestion and contention ratios, so hopefully it will be an improvement on BT. I won't be using their supplied Thompson router, but sticking with my Netgear kit.

It is a real shame about idnet. It must be hard on the team (and business bottom line) to constantly lose customers due to BT issues which they can do relatively little about.

Rik · Sep 18, 2009, 12:47:08

It is, Jonathan, IDNet have built up their reputation and BT are destroying it with impunity.

esh · Sep 18, 2009, 13:06:01

If things carry on like this it sounds like we'll all be back on ISDN

You're really not making me feel deprived of missing a "21CN" exchange...