[ubuntu-uk] What to do about black hole of broadband

Jonathon Fernyhough j.fernyhough at gmail.com
Wed Aug 11 17:19:45 BST 2010

On 11 August 2010 17:11, Rob Beard <rob at esdelle.co.uk> wrote:
> On 11/08/10 16:51, Gordon Allott wrote:
>> Hi all,
>> So I'm moving house and taking a look at the broadband speeds in the
>> local area shows something... suspicious.
>> http://www.broadbandspeedchecker.co.uk/broadband_speed_in_my_area_v2.aspx?postcode=cw26jn
>> namely that in the area I'm moving to there is a paltry less than 1mbit
>> and often around 0.33mbit. whereas just up the road 4/5mbit is fairly
>> common.
> Looks like it's down to line length.  I've done a check with the
> postcode on SamKnows.com and it appears the distance from the exchange
> is nearly 2KM, but chances are the line length could be much longer (or
> maybe it's something like an aluminium rather than copper line?).

Remember that line speed estimates are hugely conservative, and also
depend on sync speeds of those in the area. If cabling is of a low
standard then sync will be very low. In my postcode we're only
supposed to get 4-5Mb but with a decent modem (Netgear DG384 with
DGTeam firmware) I can lower the SNR target so I'm syncing at the full
8Mb limit for ADSL2. When I first put in the new modem the line would
sync at 5Mb; now it has been syncing at 8Mb for a while the line will
sync at 7Mb with no target SNR tweaking. www.kitz.co.uk has a lot of
useful information about broadband, and well worth a read.


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