Date   : Mon, 10 May 2010 11:44:38 +0100
From   : Andy@... (Andrew Livens)
Subject: [OT] ADSL capabilities

Have used Draytek routers for years and they are fab pieces of kit
considering what you pay for them, however I have found that they are
not as good as a Netgear834 for holding on to a dodgy line......

If you have a 2800 you can set the MaxDnRate and stop the BT ADSL trying
to sync at the fastest speed (failing, and then trying to sync again at
the next step down, failing etc). Start at 1M and work your way up until
the line goes unstable and then drop back to your fastest stable speed.

Note the 2820 doesn't have this command, it was dropped for some reason
:-(



-----Original Message-----
From: bbc-micro-bounces+andy=top-banana.com@...
[mailto:bbc-micro-bounces+andy=top-banana.com@...] On
Behalf Of Andrew Hancock
Sent: Thursday, May 06, 2010 9:27 PM
Cc: bbc-micro@...
Subject: Re: [BBC-Micro] [OT] ADSL capabilities

Andrew

Yep, we have lots of Draytek Routers, and also Cisco in the Office!

Time to get out the radio!

Regards

Andrew

-----Original Message-----
From: Andrew Benham [mailto:adsb@...]
Sent: 06 May 2010 17:59
To: andrew.hancock@...
Cc: bbc-micro@...
Subject: Re: [BBC-Micro] [OT] ADSL capabilities

On 05/05/10 20:36, Andrew Hancock wrote:

> As I type this my sync speed is dropping....
> 
> G.DMT      SHOWTIME        448000  1696000         16.0    49.0
> 
> Interesting, because it's been at least a week, since the last
occurrence.
> 
> When we cold/warm start the routers, we sync back-up again at
> 
> G.DMT      SHOWTIME        448000  2944000         8.5     49.5

Ah.  Perhaps I missed this in your original message.  Are you saying
that your sync speed varies a lot ?  The way I read the original message
was that it had been OK up to Jan 2009 and was now very low.

> I've also captured some BIN stats, if these are what you are referring
to.
> 
> http://www.cyrus-consultants.co.uk/adsl/bin-bits.jpg
> 
> http://www.cyrus-consultants.co.uk/adsl/bin-snr.jpg
> 
> http://www.cyrus-consultants.co.uk/adsl/bin-gain.jpg

Yep, spot on.  I'm guessing that you're using a DrayTek router - not a
brand I've had any experience with I'm afraid.

So what's happened to bins 121 to 136 or so ?  The fact that those bins
aren't being used at all but those either side are looks a tad
suspicious.  521kHz to 586 kHz: that's the bottom end of medium wave, so
I'd get my portable radio out and see if there's a big local signal
there.


-- 
Andrew Benham         adsb@...       
Southgate, London N14, United Kingdom

The gates in my computer are AND OR and NOT, not "Bill"