Interesting chart

[Noreen]

http://www.ispreview.co.uk/story/2010/04/06/the-real-importance-of-a-100mbps-national-uk-broadband-speed.html

[attachment deleted by admin]

[Rik]

That seems wrong to me, Noreen. AFAIK, FTTC depends entirely on distance from the cabinet, not the exchange.

[Glenn]

That was my take on it too. Reading the article, to me it seems that BT will not have the capacity to provide the service at the full speed.

[Rik]

Nothing new there then.

[zappaDPJ]

That was my understanding and I'm a bit alarmed especially as I'm practically living in BT fibre cabinet.

I'm informed, although I have some doubts, that the reason I'm being told I can and can't connect to it all at the same time is due to a planning objection. If that really is the case they are quite welcome to relocate the horrible ugly box in my garden, I'll not object  

[Glenn]

And you would get rent from it too 

[zappaDPJ]

It's win win all around then 

[Rik]

I've got the perfect spot for mine...

[Noreen]

That seems wrong to me, Noreen. AFAIK, FTTC depends entirely on distance from the cabinet, not the exchange.

If FTTC stands for Fibre To The Curb, Rik, then surely the distance from the exchange to the curb is relevant, isn't it, Rik?
http://www.samknows.com/broadband/21cn_acronyms.php

[Glenn]

It will be a fibre optic cable from the exchange to the curb/cabinet, so short distances (a few miles) shouldn't be a problem, the only losses will be from the cabinet over the copper/aluminium cables.

[Rik]

It shouldn't be, Noreen, as there's no speed loss of fibre, regardless of distance. The speed loss starts at the cabinet. In my case, I'm 3.5km from the exchange and 213m from the cabinet.

[Noreen]

OK, I didn't know that.

[Rik]

Which makes the ISPReview chart very puzzling. Surely they know the difference? FTTC is essentially bringing your connection to BT's fibre network much closer to you than now. Coupled with different cabling and modulation we should be seeing speeds of 30M or more.

[Glenn]

It even says

The reality here is that a 100Mbps capable network is nice to have, especially for future proofing, but its real benefit to ordinary consumers will come from an ability to deliver minimum broadband speeds with greater reliability. For example, BT's Fibre-to-the-Cabinet ( FTTC  ) technology is capable of delivering speeds at up to 40Mbps but its minimum is in the respectably strong 12-15Mbps range.

But the graph is contradicting it.

[Rik]

Weird, isn't it, Glenn. Perhaps they gave the 'artist' the wrong data?

[dujas]

It looks to me like they taken the graph from another source and then added FTTC above the VDSL2 label. It's correct in that it shows what downstream transmission speeds would be against increasing line length (although VDSL2 can theoretically reach speeds of 100 Mbps at up to 500m), but obviously fails to account for BT's deployment of fibre from the exchange to the cabinet.

[Rik]

That would certainly make sense.

[esh]

BT 22CN gives you 10,000Mbit if you live within 1m of the cabinet, otherwise it's the usual 1.5Mbit, except at peak.

[Rik]

 

[Technical Ben]

Even if it's an extra 10CM? Hmmm, I might move my desk, for the extra 9,993Mbits it seems worth it!