Date   : Wed, 05 May 2010 20:14:26 +0100
From   : andrew.hancock@... (Andrew Hancock)
Subject: [OT] ADSL capabilities

Andrew

Thanks for your informative posting to the list.

I don't really know what really the max length argument is, it's taken
us since January 2009 to get our ISP listening, we found out recently we
were LLUed, and we were removed from the Tiscali circuit, because
Eclipse were getting no-where with them in fault finding, so we were
converted back to BT Wholesale circuit, for better fault finding or
"more control". This happened about a month ago, then BT capped the line
at 512 mb, we weren't happy with that, as we don't believe this was
fixing the issue.

Electrically nothing has changed in the household since Jan '09 or been
added.

'bits per frequency bin' data on your ADSL modem ? you'd have to explain
this.

I doubt other users on Eclipse, one is with the Post Office and the
Other with BT, I don't know about the other three, we'd have to survey
them, but we are all off the same pole. They are close, metres away, as
from the pole outside my house!

What is odd, is this seems to occur, when we get cold spells, and hot
spells, so frosts, and hot days. E.g. above average or below average
external temperatures.

This issue has happened on both a LLU and BT wholesale circuit, so it
still suggests an intermittent fault, I would move ISPs, BUT, I then
fall into the danger, of then only getting 512mb/s with them, at least
with Eclipse at present, I've got graphs and data back to 2006, of
between 1.6 - 2.2MBps.

-----Original Message-----
From:
bbc-micro-bounces+andrew.hancock=cyrus-consultants.co.uk@...
.uk
[mailto:bbc-micro-bounces+andrew.hancock=cyrus-consultants.co.uk@...
loud9.co.uk] On Behalf Of Andrew Benham
Sent: 05 May 2010 18:11
To: bbc-micro@...
Subject: Re: [BBC-Micro] [OT] ADSL capabilities

On 05/05/10, Andrew Hancock wrote:
> After finally getting BT Openreach out today to complete tests, they
> state we are at the very end of ADSL (3609 metres), and it looks like
> BT are going to throw in the towel and say tough!

I think that's BT being lazy:

1/. That's not the very end of ADSL
    (see

http://www.internode.on.net/residential/broadband/adsl/extreme/performan
ce/
     and
       http://www.kitz.co.uk/adsl/max_speed_calc.php
    )

2/. Something has changed, as it used to work OK.  Have you been
    ADSL2+'d by your ISP since Jan 09 perhaps ?  Have you bought
    some new electrical appliance with a noisy switch-mode power
    supply ?  Have you taken the suppressor capacitors out of your
    BBC Micro's power supply :-)

> BT are now sending a man with a sniffer to record Radio Interference,
> which they think could be the cause.

That does sound a possibility.  My ADSL suffered around this time last
year, going from 4.5Mb/s to < 1Mb/s (and sometimes 0).  I found that
there was so much RF interference in the house that I couldn't listen
to Radio 4 198kHz in some rooms.  Turned out to be something up with
my neighbour's burglar alarm.

If you have a portable LW/MW radio, it might be worthwhile having a
walk around your property with it and see if there's some loud
interference.

Do you have access to the 'bits per frequency bin' data on your
ADSL modem ?  It might show where there are holes, although it
won't be as easy as it might be because presumably you don't have
'before' data.

Are the other ADSL users in the hamlet close to you ?  If so and
they're not having problems, it does rather point to something
in your premises.  Or your ISP - are any of the other ADSL users
in the hamlet on the same ISP as you ?

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

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

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