On 13/01/2011 12:08, Peter Collins wrote:
> I wonder if people realise what advertised Fibre really is a lot of
> the time. correct me if I'm wrong but as I understand it, a good
> percentage of the time the Fibre is only from the cabinet in the street:
>
> Virgin's service is fibre based to cabinets, as long as you are a
> cable customer, they use DOCSIS for both Broadband and TV services
> which is a copper cable from home to the cabinet and then a fibre
> "backbone".
>
> If you all not a cable customer then you will on Virgins LLU package.
>
> The 40Mb BT infinity is based on a similar solution although not
> DOCSIS, however it is still a "copper" cable going from home to
> cabinet - fibre-to-the-cabinet (FFTC).
>
> However around 25% of BT's network will be able to get 100MB
> connection which is fibre-to-the-home (FTTH).
>
> I remember reading somewhere that BT will offer a minimum download
> speed 15Mb on the 40Mb package, whereas Virgin's customers got an
> average of around 47.5Mb when on the 50Mb package.
You are correct that the BT roll out is FTTC. But I think BT are being
sensible with the offer of a minimum of 15meg, far better than telling
everyone they get 40meg and most people not getting it.
Because it's FTTC you get a fast speed to the cab then VDSL2 from the
cab to your house. The speeds for VDSL2+ profile that BT uses are here,
apparently they use "8c":
http://www.buckconsult.co.uk/fttx/BT8cProfilesVDSL2.jpg
From that you can see you need to a fair distance from the cab to drop
to 15meg, but it is possible with some long lines. I think being
conservative with the speed claims makes a nice change from my "up to
24meg" broadband that I have which in reality is only 2meg due to my
line length!
%20broadband%20provider&References=4D2EF2C7.1040208@rowles.org.uk&In-Reply-To=4D2EF2C7.1040208@rowles.org.uk&Body=On%202011-01-13%2012:43,%20Stephen%20Rowles%20wrote:%0A>%20On%2013/01/2011%2012:08,%20Peter%20Collins%20wrote:%0A>%20>%20I%20wonder%20if%20people%20realise%20what%20advertised%20Fibre%20really%20is%20a%20lot%20of%20%0A>%20>%20the%20time.%20correct%20me%20if%20I'm%20wrong%20but%20as%20I%20understand%20it,%20a%20good%20%0A>%20>%20percentage%20of%20the%20time%20the%20Fibre%20is%20only%20from%20the%20cabinet%20in%20the%20street:%0A>%20>%0A>%20>%20Virgin's%20service%20is%20fibre%20based%20to%20cabinets,%20as%20long%20as%20you%20are%20a%20%0A>%20>%20cable%20customer,%20they%20use%20DOCSIS%20for%20both%20Broadband%20and%20TV%20services%20%0A>%20>%20which%20is%20a%20copper%20cable%20from%20home%20to%20the%20cabinet%20and%20then%20a%20fibre%20%0A>%20>%20%22backbone%22.%0A>%20>%0A>%20>%20If%20you%20all%20not%20a%20cable%20customer%20then%20you%20will%20on%20Virgins%20LLU%20package.%0A>%20>%0A>%20>%20The%2040Mb%20BT%20infinity%20is%20based%20on%20a%20similar%20solution%20although%20not%20%0A>%20>%20DOCSIS,%20however%20it%20is%20still%20a%20%22copper%22%20cable%20going%20from%20home%20to%20%0A>%20>%20cabinet%20-%20fibre-to-the-cabinet%20(FFTC).%0A>%20>%0A>%20>%20However%20around%2025%%20of%20BT's%20network%20will%20be%20able%20to%20get%20100MB%20%0A>%20>%20connection%20which%20is%20fibre-to-the-home%20(FTTH).%0A>%20>%0A>%20>%20I%20remember%20reading%20somewhere%20that%20BT%20will%20offer%20a%20minimum%20download%20%0A>%20>%20speed%2015Mb%20on%20the%2040Mb%20package,%20whereas%20Virgin's%20customers%20got%20an%20%0A>%20>%20average%20of%20around%2047.5Mb%20when%20on%20the%2050Mb%20package.%0A>%20You%20are%20correct%20that%20the%20BT%20roll%20out%20is%20FTTC.%20But%20I%20think%20BT%20are%20being%20%0A>%20sensible%20with%20the%20offer%20of%20a%20minimum%20of%2015meg,%20far%20better%20than%20telling%20%0A>%20everyone%20they%20get%2040meg%20and%20most%20people%20not%20getting%20it.%0A>%20%0A>%20Because%20it's%20FTTC%20you%20get%20a%20fast%20speed%20to%20the%20cab%20then%20VDSL2%20from%20the%20%0A>%20cab%20to%20your%20house.%20The%20speeds%20for%20VDSL2+%20profile%20that%20BT%20uses%20are%20here,%20%0A>%20apparently%20they%20use%20%228c%22:%0A>%20%0A>%20http://www.buckconsult.co.uk/fttx/BT8cProfilesVDSL2.jpg%0A>%20%0A>%20%20From%20that%20you%20can%20see%20you%20need%20to%20a%20fair%20distance%20from%20the%20cab%20to%20drop%20%0A>%20to%2015meg,%20but%20it%20is%20possible%20with%20some%20long%20lines.%20I%20think%20being%20%0A>%20conservative%20with%20the%20speed%20claims%20makes%20a%20nice%20change%20from%20my%20%22up%20to%20%0A>%2024meg%22%20broadband%20that%20I%20have%20which%20in%20reality%20is%20only%202meg%20due%20to%20my%20%0A>%20line%20length!%0A>%20%0A>%20%0A>%20 "Reply to this message")
