FTTC at 2.2KM

Just wondering if anyone has seen any stats from a long FTTC line or have a rough figure of what FTTC speed should be on a line this long from the cab? Thanks

Andy

Possibly 10 Mbps to 13 Mbps

Not many lines to base that on though

My dad got BT Infinity Option 1 installed yesterday and was estimated around 13Mb on dsl checker until changing to 30Mb with the recent changes! I knew there was no chance of receiving 30. He was on a 9KM line syncing at around 1.6Mb which seemed very impressive =). Engineer came and installed and it only synced at 6.8Mb. He went and made a few calls and came back and said we could revert back to ADSL or keep the new FTTC service at this speed. We decided to keep it of course as it's better than it was and the ping is much nicer now. How much would a change to the 30MHz profile in the future help?

In reply to a post by swervinc:

Just wondering if anyone has seen any stats from a long FTTC line or have a rough figure of what FTTC speed should be on a line this long from the cab? Thanks

Andy

The longest connection that I have any detailed stats for is approximately 1600m from the cabinet & around 7km in total from the exchange.

Sync speed is only around 18Mb, with bit-loading only at ADSL frequencies (attenuation is simply too high to achieve anything from the higher frequency bands), but obviously it is still a lot better than a 7km ADSL connection.

1600m line length Snapshot stats

4 Day Ongoing Stats

For another connection, also around 1600m from the cabinet, sync speed is just over 16Mb.

Both connections appear incredibly stable, with lowish error counts (ignore the big spikes at the start of the error graphs. They are just there as errors had accumalated over a long period prior to the start of the monitoring scripts).

In reply to a post by swervinc:

How much would a change to the 30MHz profile in the future help?

It very much depends on distance from the cabinet.

If "too far" from the cabinet (not the exchange), there would be no speed increase as attenuation would be too high for the 30MHz frequencies.

It appears that nothing is being achieved from the 17MHz frequencies either.

Do you know how far it is to the cabinet?

Yes. It's roughly 2.2KM from engineer.

See this;

http://www.suomicom.fi/VDLS2_vs_ADSL2_vertailua.pdf

30a won't help much on anything other than short lines, in fact it could be worse than 17a on longer lines.

Thanks for the quick feedback. At least I now know there isn't anything making the line under perform and it should provide a faster more stable connection than before. Looks like FTTP is the only answer for superfast broadband on some lines though.

In reply to a post by Bald_Eagle1:

The longest connection that I have any detailed stats for is approximately 1600m from the cabinet & around 7km in total from the exchange.

Sync speed is only around 18Mb...

My line is just over a mile to the cabinet. Initially it synced at 39Mb, but over a few weeks it has dropped back to 32Mb. Better than I'd expected!

In reply to a post by hoopla:

My line is just over a mile to the cabinet. Initially it synced at 39Mb, but over a few weeks it has dropped back to 32Mb. Better than I'd expected!

I'd say that is pretty amazing for that distance!

F-F-S, in that document they use Kft as a measurement of distance. Can we all just make up our own weights and measures now? Use imperial, and talk about miles, or use metric and talk about KM, but Kft?

Yes, our new service works great at 430 guinea-metres.

Ironically this is a document that talks about standardisation.

Bunch of moronic imbecilic pillocks.

It's common on the other side of the Atlantic. Over here we use the Ell.

In reply to a post by hoopla:

My line is just over a mile to the cabinet. Initially it synced at 39Mb, but over a few weeks it has dropped back to 32Mb. Better than I'd expected!

That's hugely impressive - when vdsl2 came out initally the suggestion was you'd be lucky to get half that,

Why not standardise on the units used by The Register? http://www.theregister.co.uk/Design/page/reg-standar...

The trouble with The Register units is that being a completely 1ndependent body they can change their standards whenever they want. I predict even within hours.

In reply to a post by arfster:

That's hugely impressive - when vdsl2 came out initally the suggestion was you'd be lucky to get half that,

Sadly, that still seems to be BTW's view. Their estimate was 10.7 down, 1.0 up. The engineer's tester showed 39 down 6.8 up, but of course the uplink speed is capped to 2.

I get actual downloads of around 30 and uploads of about 1.8 but because BT say the line is incapable of faster than 1.0 up, they refuse to allow the uplink speed cap to be raised.

Kilo-feet (kft) has been in use for many many years I certainly used it back in the 70s and manuals in use then, written back in the 30s and 40s also referred to it.

It is used for cable lengths or transmission distance, torpedo or gunnery range and a few other.

Kilofeet is an alternative name for the millipede.

[groan]

kilofeet * millipede = square feet

Uh uh!
Square Mft.

1.3 miles from cabinet gets me 18Mb down 1.2Mb up

Overall 5.5 miles from exchange

On Adsl 1Mb down and 0.6Mb up so very pleased.

In reply to a post by RobertoS:

Uh uh!
Square Mft.

No, kilo x milli = 1

10³ x 10^-3 = 10⁰ = 1

Oops!

But ... but!

What's a pedeant?