More broadband issues..

Thought as much;-!...

Reply to
tony sayer
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Have a go at your ISP and if they don't do anything then use either Entanet or Zen or Eclipse who are quite well priced and relatively good.

If you want to borrow a speedtouch or a Draytek give us a mail..

But I think that answer somewhere lies with BT or Openreach sometimes when you get one of their blokes with some tea and biccys they might give you another pair .. worth a try;!..

Reply to
tony sayer

I didn't mention telnet, 'guv, he did.

Reply to
Andy Hall

Actually, you'd be surprised (actually you probably wouldn't) at the number of security horrendities that I see - most at places that should know better.

Reply to
Andy Hall

I am firmly convinced it isn't actually a problem that can be 'fixed' at all.

The way I am beginning to understand it is this.

During the trial period BT sets up three parameter..how fast they will allow data to get to you, what the expected safe speed is, and a speed below which they will come out and fix the line.

This in no way alters what raw speed you connect at. That's in the lap of the gods, and I suspect the way its MEANT to happen that if you get a bad patch of interference, you will retrain at a lower speed, until you end up stable.

This is fine for time persistent interference, but is bollocks if you are getting bursts - these knock the modem off, and yet by the time its back on, the noise is gone and you are back up to high speed again.

My router seems inalienably set to pick the speed at which it gets 3.5dB SNR. A very dangerously bleeding edge figure, and I can't adjust that, it seems.

I simply do not know enough about the DSLAMS that BT uses to know whether or not they can be adjusted to lower the connection speed.

Reply to
The Natural Philosopher

Yes it trials it over around 10 days then picks a number thats a bit slower than the max it can run at so its stable then it should settle down..

You really ought to be complaining to your ISP and if they won't do anything then ask for your MAC and then take your custom elsewhere, what have you to loose?..

We've got routers much further away from exchanges then you have and they fall over sometimes, but nowhere near as frequently as your grumbling about!..

Reply to
tony sayer

Have you asked your ISP whether the DSLAM (or whatever it is) is still in its rate trial period, and whether they can set it to a lower rate? This will probably require you getting through one or two levels of front-line support whose job it is to prevent you getting to the next level of support.

In my case, the bloke in ISP-land could tap something into his computer and instantly change the line configuration to something less aggressive.

Reply to
Alex Selby

I think it sort of is..and isn't. It ought to be finished and the stats show that the BT max, fault and BRAS are all stable..

I seem to have some sort of contact with someone with a slightly more nous than the phone guy on the usenet group today. I have explanied the situation..let's see.

Well that's is a relief. It shows that it CAN be done by the ISP.

Reply to
The Natural Philosopher

Telnet is as secure as the link between you and the remote is.

It used to be a nightmare when techies on coax hubbed networks would set up linux or Unix boxes to sniff traffic on the network.

Once we installed 10baseT switches instead, that stopped dead. Ok there was a finite chance of hacking the switches and routers, but since those tended to use the same password, it never was a problem. If you knew the router password you had enough authority to get the root password on the servers as well or you already had it..

And unless you were inside the admin network you were firewalled out anyway.

There's a lot of guff talked about security. We installed a firewall and did an audit for a major corporate once.

"whats our chief danger"

"The direct dial in modems that most of your managers have on their PCs so that they an direct dial their extensions and use the internal network from the laptop they took home: Plus the fact that you do not pay your IT admin people enough attention or money to render their expertise effective nor them incorruptible"

Reply to
The Natural Philosopher

Yes, though I don't know if unbundledness makes a difference. My case was with TalkTalk who are unbundled at my exchange

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.Is Claranet unbundled at your exchange? (You can find out from the above site.)

Reply to
Alex Selby

No one is.

ADSL Max went online April 2006. Its just got ADSL and ADSL max, No LLU or anyhting else, no cable, no nothing. :-(

Only 857 customers too. ;-)

Reply to
The Natural Philosopher

I hope you would _always_ take your ear defenders or, better still, pick up a pair of disposables from the hopper by the door on the way in.

If you have to raise your voice to be heard, you need ear defenders.

You should be able to see the risk assessment for the room(s) and see what noise level there is.

Reply to
Rupert Moss-Eccardt

That would assume that rooms are all the same in terms of what is in there. It also assumes that one is in a country where risk assessments are actually done. It further assumes that said risk assessments are done properly.

Reply to
Andy Hall

A densely populated area then. B-) Just 5 delivery points in our postcode and they are all about 1/2 a mile from each other. On the other hand another postcode near here has 75 delivery points and covers an entire housing estate.

I emailed my ISP (A&A) about some other minor problem but mentioning the low MSR/FTR, they then said it could be reset. Took a bit of banging, on their part, at the door of BT Wholesale but it was done. Helps if you have an ISP with helpdesk staff that have more than a clue and are not script bound. B-)

I think there is a little more to it than that. As you mention else where bursts of noise or something that force a resync but that happens "noise free" so is back at a "high" speed. Getting the sync speed to be not so optimistic treats a symptom (repeated resyncs) but isn't a cure (the noise bursts).

Reply to
Dave Liquorice

I think those are a fact of life with a mile of cable in any environment. They are in fact why a reliable connection should be at 5dB SNR or better.

Finally after last nights cold its resynched at 5120Kbps, and is running at 5dB SNR. Experience suggests it should hold that pretty consistently..

I just hope it doesn't drop out for another reason and re-train at 6...

Reply to
The Natural Philosopher

Hence my other suggestion:

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Reply to
Brian Morrison

Note that the 4500 is referring to TCP throughput whereas the sync rate is the raw data rate including ATM and TCPIP overhead.

In my case, 5120kbps (which I force) equates to an absolute maximum of

550-560 kBps, which is very close to 4.5Mbps.

The BT ATM system is arranged to allocate capacity in blocks of 500kbps and will always provide a capacity equal or less than the sync rate allows. It is advantageous to force a speed that is just sufficient to completely fill this capacity, which is where the 5120kbps that I use comes from.

You won't hit quite the same throughput because I remember seeing that the ADSL has interleaving enabled, BT's kit does this when it sees lots of disconnections.

Reply to
Brian Morrison

How? Thats what I am at now, and its stable..it seems the line quality degrades wih temperature..i was cold last night..

equates to an absolute maximum of

This is what I wanto do. Force 5120 or so. But how?

Reply to
The Natural Philosopher

Max is designed to maximise the connection speed, so the initial target SNR that BT's kit is set to request is 6dB, the next steps up are

9,12,15dB as you might expect. For whatever reason you router is ignoring that, I'd suggest searching for some forum where the DSL-504 is discussed as other users may be familiar with its behaviour.

The sync speed is not a parameter that BT seek to control, the whole point of RADSL, rate adaptive IOW, is that the SNR is the controlling parameter.

Reply to
Brian Morrison

Just had a look at out Peterbourgh station line SNR is 6 dB but last re connect was 345 hrs ago at 3 odd MHz station is apx 7 KM from exchange!.

And some of that is ally cable!....

Reply to
tony sayer

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