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Standard User RobertoS
(sensei) Wed 28-Nov-12 21:01:18
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
Ummm!

As has been discussed, it could be the estimate for the ADSL line is low due to more information being available. But importantly that line is seriously under-performing and this could be affecting the information used for the estimate.

The correct estimate for that line is over 17Mbps, which tallies with your other one. However, that being the case, at your "capped" 8128Kbps, which is the maximum available on a "BT" ADSL line, your noise margin should be sky-high. See "Cause 3" on this page, then calculate back using
On ADSL such as ADSL Max each rise of 3dB in the target value costs between 500kbps and 750kbps of connection speed.
I reckon your downstream noise margin should be over 24dB.

Have a read about the Ring/Bell wire and Miscellaneous nasties in this section.

I'm assuming absolutely everything that connects to your phone line has a working filter, including Sky boxes and burglar alarms.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet Extra Fibre (FTTC). Sync ~ 53.5/15.2Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
Administrator MrSaffron
(staff) Thu 29-Nov-12 09:07:40
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Re: ADSL2+ Upgrade


[re: RobertoS] [link to this post]
 
While line may be under performing and no harm in tidying up ring wire. I'd not be so pessimistic on the line, my usual power backoff comment does not seem to apply as power levels look high, but could just be the way that modem works when synced at the maximum rated speed

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User RobertoS
(sensei) Thu 29-Nov-12 18:18:40
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Re: ADSL2+ Upgrade


[re: MrSaffron] [link to this post]
 
I sort of agree. I don't think it will be primarily the ring wire causing the issue, more likely one of the things I cover in the references I gave him.

My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet Extra Fibre (FTTC). Sync ~ 53.5/15.2Mbps @ 600m. - BQM

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.


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Standard User Herstmonceux
(member) Tue 04-Dec-12 15:54:54
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
I ran my number through the checker again today and it came up with the following, does this mean ADSL2+ is now available?

Exchange HERSTMONCEUX

Your exchange is ADSL enabled, and our initial test on your line indicates that your line should be able to have an ADSL broadband service that provides a fixed line speed up to 2Mbps.

Our test also indicates that your line currently supports an estimated ADSL Max broadband line speed of 7.5Mbps; typically the line speed would range between 6.5Mbps and 8Mbps.

Our test also indicates that your line should be able to have an ADSL2+ broadband service that provides a fixed line speed up to 2Mbps.

Our test also indicates that your line currently supports an estimated ADSL2+ broadband line speed of 14Mbps; typically the line speed would range between 8Mbps and 18.5Mbps. Our test also indicates that your line could support an estimated ADSL 2+ Annex-M broadband upstream line speed of 1Mbps and downstream line speed of 14Mbps; typically the downstream speed would range between 8Mbps and 18.5Mbps.
Administrator MrSaffron
(staff) Tue 04-Dec-12 16:00:09
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
BT Wholesale seem to think so, so all down to your retail provider now

Andrew Ferguson, [email protected]
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Herstmonceux
(member) Wed 05-Dec-12 10:29:09
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Re: ADSL2+ Upgrade


[re: MrSaffron] [link to this post]
 
PlusNet say I should be upgraded within 7 days!
Standard User Herstmonceux
(member) Mon 07-Jan-13 11:31:24
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
Finally got my upgrade today, here's my line stats:

DSL Status Up
DSL Modulation Mode G992_5_A (ADSL2+)
DSL Path Mode Interleave
Downstream Rate 17086 kbps
Upstream Rate 440 kbps
Downstream Margin 5.2 dB
Upstream Margin 29.9 dB
Downstream Line Attenuation 25.1 dB
Upstream Line Attenuation 8.3 dB
Downstream Transmit Power 20.1 dB
Upstream Transmit Power 12.4 dB


Speed test is still showing my old speed of 6.4 down and 0.4 up but I understand it takes a week or so before I get full speed. Is that correct?
Standard User yarwell
(sensei) Mon 07-Jan-13 12:38:17
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
your upstream speed seems to be capped.

Check what speedtester.bt.com says your IP profile is for downstream

--

Phil

MaxDSL - goes as fast as it can and doesn't read the line checker first.

MaxDSL diagnostics
Standard User Herstmonceux
(member) Tue 08-Jan-13 07:16:37
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Re: ADSL2+ Upgrade


[re: yarwell] [link to this post]
 
I've run the BT speed test and here's the results:

Download speedachieved during the test was - 13.87 Mbps
For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.
IP Profile for your line is - 14.89 Mbps

Upload speed achieved during the test was - 0.2Mbps
Additional Information:
Upstream Rate IP profile on your line is - 0.45 Mbps


And here's a speedtest.net result http://www.speedtest.net/result/2421115552.png

So it seems that download has improved but upload is no better (actually worse) than before.
Standard User David_W
(experienced) Tue 08-Jan-13 08:28:33
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Re: ADSL2+ Upgrade


[re: Herstmonceux] [link to this post]
 
That seems to imply you're on a capped upstream profile. I'd query this with your ISP - your line should be capable of a faster upstream speed.
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