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[kitz]

>> Fairly modest error counts after nearly two days of uptime:

 
System should cope fine with 4 ES in 15 mins

Actually in view of the new sync speed IMHO its doing pretty good. Seems more stable in the past 24 hours than the previous

[roseway]

Yes it does. At the moment I'm plucking up courage to have a play with the target noise margin setting command. I've located a CLI manual for the 5100 (its predecessor) but its description of the commands is rather terse. All it says is:

1.139 wan adsl targetnoise
          Description Use this command to set adsl transmission target noise margin.
          Command Syntax     wan adsl targetnoise
          Output field description
                             sys>wan adsl targetnoise
                             usage: gain value should be snr margin(dB) * 512
                             current value:900

On my 5200g the current value is zero.

[mr_chris]

Hmm - zero may mean 'default' - perhaps try setting to 900 and see what happens.... difficult one cuz I'm sure the last thing you want is to upset the DLM again!

To tweak or not to tweak!...

[roseway]

If and when I try it, I'll do so in the middle of the day when interference levels are lowest. I would certainly like to get to the bottom of this one, if only for the technical interest. And if it works then we have another tool to offer people.

[mr_chris]

Absolutely - and I'm sure we all appreciate you sharing your findings with us

[roseway]

Well, I've had a play and got absolutely nowhere. I've tried various values, but none of them seem to be accepted, because reading the value back still shows the default zero value. There's a startup file called autoexec.net which can be edited from the CLI to add commands like this, and I've tried that too, but after rebooting the router it still has the same 6 dB noise margin.

So for the moment I'm stumped. Billion routers seem to get quite a bit of mention in the whirlpool.au forums, so I'm going to have a look there next.

[mr_chris]

They're aussie routers aren't they? Probably why they're mentioned a lot on the whirlpool forums.

[b4dger]

They're aussie routers aren't they? Probably why they're mentioned a lot on the whirlpool forums.

I don't think they are:
Billion Electric Co. Ltd. (Taiex: #3027), based in Taiwan, was founded in 1973...
www.billion.com/corporate.html

[mr_chris]

Oh, well I wonder where I gleaned that misinformation from? 

Perhaps just that they seem to be more popular in Oz - or were distributed there before they came over here... I dunno 

[roseway]

The chap on TBB who first brought this to our attention has bravely put back his ST585 to see what happens. His noise margin immediately went back to 15 dB, so he reconnected the Billion post haste.

So that question has been answered - the 5200G doesn't actually reset the target noise margin, it simply forces it at connection time.

[mr_chris]

Interesting... good in one way, but I've just thought about the ramifications for people plagued by EMI who need a higher SNR margin!

In fact, things could get to the stage where an engineer is called out, plugs his little Voyager 105 in, and it connects at 15dB SNR, and the engineer will obviously have to blame the end user's router for the problems, £150 thank you very much 

There ought to be an easy way through the web interface of turning it off, if the router's going to pull its SNR stunt on every line. Don't think there's a way to DMT tweak it either

Sorry for the doom-n-gloom post, but it was just a thought that occurred to me!

[roseway]

No need to be sorry, you're quite right. In my position I'm delighted to have the possibility to force the target noise margin to its default value, but as you say, it wouldn't be so good for a line which needs the higher margin for stability. I've no idea how this router would respond on an unstable connection. The other thing I don't know is whether it inhibits DLM from lowering the target automatically on a stable line.

I haven't yet had the opportunity to trawl the whirlpool forums, but I will do that soon.

[Mick]

How's this performing then guys?  Still holding the high link speeds?  Is it worth buying one?

[roseway]

On my particular line this is the best router I've used, and I've used most of the popular ones. It has increased my IP profile by  one step (from 5000 to 5500) and is very stable, with a pretty low error rate. I'm delighted with it, but of course there's no guarantee that it will perform so well on any other line.

[Mick]

Thanks!  Have you by any chance used 2WIRE 1800HG and if yes, how does it compare with the BiPAC?