21CN WBC Status question

Hi All

My exchange according to SamKnows says RFS 31/3/2012 but I thought I would see what the BT Boradband Checker has to say about the phone number and got this (copied of the page report)

==================================================================

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 2Mbps; typically the line speed would range between 1Mbps and 3.5Mbps.


Our test also indicates that your line currently supports an estimated ADSL2+ broadband line speed of 2.5Mbps; typically the line speed would range between 1Mbps and 4Mbps.

===================================================================

FWIW I am currently on Max ADSL sync'ing at 3648kbps with this test result:-

http://www.speedtest.net/result/1779979652.png

And the TBB test slightly different speed?




So based on the BT checker is my exchange already ADSL+2 enabled and would I benefit from the switch to it???

Edited by deleted (Fri 17-Feb-12 23:06:38)

In reply to a post by Routefinder:

And the TBB test slightly different speed?

If that was really meant to be a question: The estimates are of connection/sync speed but the speedtest is of actual throughput, usually about 83% of sync.

The BT chacker indicates that exchanged is 21CN. At those speeds you will not benefit from ADSL2+, except your upload speed should increase. However, you may gain slightly from ADSL2 only.

Post your router stats so we can see. Your speed indicates an attenuation of about 55 dB.

I don't think that BTW report necessarily means that ADSL2+ is enabled. For exchanges that are scheduled for FTTC but not enabled, users get their FTTC estimates with exactly the same wording.

If you put your phone number into the IDNet checker on this page see which package page it takes you to.

Edited by RobertoS (Sat 18-Feb-12 00:10:47)

In reply to a post by XRaySpeX:

In reply to a post by Routefinder:

And the TBB test slightly different speed?

If that was really meant to be a question: The estimates are of connection/sync speed but the speedtest is of actual throughput, usually about 83% of sync.

The BT chacker indicates that exchanged is 21CN. At those speeds you will not benefit from ADSL2+, except your upload speed should increase. However, you may gain slightly from ADSL2 only.

Post your router stats so we can see. Your speed indicates an attenuation of about 55 dB.

Stats here:-

Uptime: 7 days, 9:06:05

DSL Type: G.992.1 annex A

Bandwidth (Up/Down) [kbps/kbps]: 448 / 3,648

Output Power (Up/Down) [dBm]: 11.5 / 19.0

Line Attenuation (Up/Down) [dB]: 31.5 / 54.0

SN Margin (Up/Down) [dB]: 20.0 / 5.5

So if ADSL+2 has the potential to give me some improvement will PlusNet CSC be able to tell me if my exchange really is enabled as the BT checker seems to suggest? The checker infers in best case scenario I will get another 0.5Mb in download assuming I am reading that right???

Maybe I should PM Orbey and see what he can tell me about it

In reply to a post by RobertoS:

I don't think that BTW report necessarily means that ADSL2+ is enabled. For exchanges that are scheduled for FTTC but not enabled, users get their FTTC estimates with exactly the same wording.

If you put your phone number into the IDNet checker on this page see which package page it takes you to.

Hi Roberto

Using the checker on the link you give it 'returns' only ADSL Max packages, so why the variance with the BT's own checker??? Does seem sort of misleading

As I said, the BT Wholesale checker doesn't say it is live. It just says "your line supports", ie when the exchange is live your line is OK to get it.

In reply to a post by RobertoS:

As I said, the BT Wholesale checker doesn't say it is live. It just says "your line supports", ie when the exchange is live your line is OK to get it.

OK but the same phrase is used about ADSL Max and I already have that service so by inference the ADSL+2 functionality is there, hence why I said the report is misleading???

In reply to a post by RobertoS:

For exchanges that are scheduled for FTTC but not enabled, users get their FTTC estimates with exactly the same wording.

No! A few months ago before FTTC came to a cabinet near me. BT checker said something like "FTTC estimated to be available on {date} ...".

@ OP: Don't rely on BT Checker being accurate to 0.5 Meg. You already getting above top of its range!

True, but in earlier days it was the same. Even with the current wording I think it still says "supports". Not "will support".

Unfortunately SamKnows is behind on the latest information from BTw (BTw closed the page where SamKnows used to get the latest Datasheet showing what exchanges are due and which are enabled. However, the document can be obtained elsewhere).

I doubt you would get much out of ADSL2+ with your attenuation though.

I might also add that it could be some time before BTw accept orders for 21CN on your exchange if it has been enabled.

For example: My exchange was enabled for 21CN early January and the earliest time BT Retail are letting us renew our contract is next Tuesday (21st February), when they say the line will be switched to the new equipment.

Edited by chris6273 (Sat 18-Feb-12 01:46:56)

Mine is much the same including the date. Someone on the Plusnet community forum recently made a spreadsheet available which showed the soonest that 21CN would be available for me was 1/3/12.

With 21CN the IP profile is 88% of the connection speed. With my 6km long line with some aluminium that may be the biggest advantage of 21CN to me.

In reply to a post by Michael_Chare:

Mine is much the same including the date. Someone on the Plusnet community forum recently made a spreadsheet available which showed the soonest that 21CN would be available for me was 1/3/12.

With 21CN the IP profile is 88% of the connection speed. With my 6km long line with some aluminium that may be the biggest advantage of 21CN to me.

Hi

Based on the feedback and the data available folk like us on the ends of long lines will see diddly squat benefit from ADSL+2 or indeed it seems using an LLU service. I would be sceptical of any claims that we could see an improvement as the cynic in me says ADSL+2 needs better copper to work well and just maybe 'we' would get a worse BB experience by trying for ADSL+2???

The only way for us will be when BT Infinity pulls its finger out and does the FTTC to "our" exchanges. FWIW I see that various ones around ours in Surrey are or will be FTTC'ed..................................so feeling kind of left out

Oh, IMO you are right about aluminium being present! A ways back I chatted with a BT engineer working in a local roadside cabinet and he remarked that a large part of his job if remaking joints where the copper & ali meet and that the only solution was to pull fresh copper bundles but that would "never happen...." C'est la vie

RS Re whether ADSL+2 will be good for the limited increase we might get??? Perhaps CSC can advise if I was to opt for it when available but I get a worse service in respect of sync speed & actual download speed and more importantly a less stable connection could I revert back to ADSL Max without charge and expect a return of the sort of speed and stablity I have of late???

Edited by deleted (Sat 18-Feb-12 23:55:29)

ADSL2 is often the best option out of ADSL, ADSL2 and ADSL2+., but you can only get it f you are on an ADSL2+ connection.

Many routers allow you to select it. A few ISPs understand enough to configure it at the exchange end, but most seem only to know setting it to ADSL2+ or ADSL .

ADSL Max is dead or dying anyway. You are probably now on IPSC, which is an interim stage.

ADSL2 uses the same frequencies as ADSL, with a better protocol. Generally a tiny downstream increase, (better than ADSL2+ in many cases), and useful upstream compared to ADSL. Stability comparable with ADSL, where on longish lines ADSL2+ can be less so.

I'm not sure how accurate the IDNet checker is. When my line was due for upgrade to ADSL2+ last year I tried several checkers to see if it had actually been upgraded. Whereas Zen and others showed that ADSL2+ was available on my line the IDNet checker showed only ADSL Max. I've just tried my number in the IDNet checker and it shows ADSLMax despite my having been on ADSL2+ for some months now. It might be worth using the Zen checker as well.

Thanks for that! I didn't know they didn't do a pukka live test. The idea is sound though, so I will stick with your suggestions the next time someone asks. I'm not sure the Zen one isn't just quoting the BT Wholesale checker though.

Edited by RobertoS (Sun 19-Feb-12 18:11:19)

The Zen one isn't 100% accurate when it comes to where it states whether a line has been upgraded to 21CN. I popped my number in (My exchange has recently been upgraded - Should be switched over tomorrow) and it said I've been upgraded, however I'm still on the old Alcatel DSLAM (20CN).

It gives the same quote as the BT Wholesale expected speed (They both give 17Mbps for me).

In reply to a post by RobertoS:

I don't think that BTW report necessarily means that ADSL2+ is enabled. For exchanges that are scheduled for FTTC but not enabled, users get their FTTC estimates with exactly the same wording.

If you put your phone number into the IDNet checker on this page see which package page it takes you to.

Not the case with ADSL2+ - this is my exchange which is due on the same time:

Your exchange is planned to have ADSL2+ by 31st March 2012. Our test also indicates that your line currently supports an estimated ADSL2+ broadband line speed of 12Mbps; typically the line speed would range between 7Mbps and 17Mbps. 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 12Mbps; typically the downstream speed would range between 7Mbps and 17Mbps.

Tried the Zen checker at it says 2.5Mbps and up to 20Mbps which AFAIK equates to ADSL2+

This seems to echo the BTW checker ???

FWIW my Speedtouch config says G.992.1 Annex A and remote vendor ID ALCB !

Edit ~ various online checkers all say the up to 20Mbps even PlusNet is on the list However I wonder if they are confusing the fact that there are two LLU providers now at the exchange but if so why is PlusNet listed as an up to 20Mbps ie ADSL2+ provider at my exchange???

Edited by deleted (Tue 21-Feb-12 01:26:23)

In reply to a post by Routefinder:

Tried the Zen checker at it says 2.5Mbps and up to 20Mbps which AFAIK equates to ADSL2+

This seems to echo the BTW checker ???

FWIW my Speedtouch config says G.992.1 Annex A and remote vendor ID ALCB !

Edit ~ various online checkers all say the up to 20Mbps even PlusNet is on the list However I wonder if they are confusing the fact that there are two LLU providers now at the exchange but if so why is PlusNet listed as an up to 20Mbps ie ADSL2+ provider at my exchange???

As it seems the exchange may have been WBC enabled earlier than samknows knows, what's surprising about Plusnet being on which list?

Hi Routefinder,

ADSL2+ is available from us, and although your speeds probably won't increase dramatically you will now get 88.2% of the sync rate as your profile. Also, on your current 20CN connection, if your line drops a few times you can find that the BT IP profile goes down and can take a few days to come back up. Now, with 21CN, profiles are allocated immediately depending on your sync rate.

Jojo

In reply to a post by jpilson:

Hi Routefinder,

ADSL2+ is available from us, and although your speeds probably won't increase dramatically you will now get 88.2% of the sync rate as your profile. Also, on your current 20CN connection, if your line drops a few times you can find that the BT IP profile goes down and can take a few days to come back up. Now, with 21CN, profiles are allocated immediately depending on your sync rate.

Jojo

Hi Jojo

Many thanks for looking in

Right I am currently sync'ed at 3648 and my TBB measured speed is

So what is my current profile rate???

As such at 88.2% speed under ADSL2+ what am I likely to see as a measured speed???

You mention the added benefit of immediate changes to the speed based on the sync rate rising or falling, sounds good to me

So as per my earlier question ~ if ADSL2+ is indeed a worse service for me can I revert to Max ADSL without penalty???

But back to basics are you explicitly saying my exchange is indeed ADSL2+ enabled right now, if so when will you be able to offer me the service and how is the switchover handled should I request it???

Lastly can my Thomso TG585v7 work with ADSL2+???

TIA

Edited by deleted (Tue 21-Feb-12 10:23:06)

You are confusing two things
The new IP profile system applies to all users on 21CN so once moved to 21CN you will get that advantage
On 21CN you can be provisioned on ADS1 - I am - or ADSL2+ which is more likely to work as ADSL2 on your connection.
Moving to 21CN involves changing the equipment at the exchange and is effectively irreversible but once on 21CN moving from ADSL2+ to ADSL1 is relatively easy and as far as I know doesn't incur any charges

In reply to a post by Oldjim:

You are confusing two things
The new IP profile system applies to all users on 21CN so once moved to 21CN you will get that advantage
On 21CN you can be provisioned on ADS1 - I am - or ADSL2+ which is more likely to work as ADSL2 on your connection.
Moving to 21CN involves changing the equipment at the exchange and is effectively irreversible but once on 21CN moving from ADSL2+ to ADSL1 is relatively easy and as far as I know doesn't incur any charges

Adding to that, there's ADSL2+, ADSL2 and ADSL.

ADSL2 is usually the best setting when 2+ is not brilliant on longish lines. It tends to give a marginally higher speed than either ADSL or ADSL2+, with the stability of ADSL.

People tweaking, including ISP (in general) support, seem rarely to consider ADSL2. The DLM also only appears to invoke it on really bad "ADSL2+" connections, when in fact it could be better as the default setting on quite decent lines.

Hi Routefinder,

21CN is available and I can place an order to have you moved onto it. It normally takes 7 days once the order is placed. You can move back to 20CN with the same 7 day lead time, however ADSL1 on 21CN would be a better move, with just a 24 hour lead time.

Your current sync rate would get you a BT profile of 3217K which our system would set as 3200K, so a little higher there!

Your TG585v7 will work fine.

Jojo

In reply to a post by jpilson:

Hi Routefinder,

21CN is available and I can place an order to have you moved onto it. It normally takes 7 days once the order is placed. You can move back to 20CN with the same 7 day lead time, however ADSL1 on 21CN would be a better move, with just a 24 hour lead time.

Your current sync rate would get you a BT profile of 3217K which our system would set as 3200K, so a little higher there!

Your TG585v7 will work fine.

Jojo

sounds like a no brainer with added input from oldjom & RobertoS what with the flexibility once on the new ADSL2+ "kit"

Though in respect of the sync vs the profile I thought the profile did steps in 0.5K thus why I sync 3648 but have a speed of 2.8Mbps and last time I checked my stable rate is 3Mbps ~ or am I just getting (even more) confused!!! lol

Please go ahead and make the switch ~ your confirmation please on this and what I should look out for by of changes in the Router information.

In regard to the switch over does it have a training period like 'old' & Max ADSL???

Or do I simply see a discon/recon in about 7 days and then it is business as normal?

Edit ~ re the 585v7, this is quite an old one and has never had a firmware update. Please advise about this aspect if there is any need to update or not etc??? NB has software 7.4.4.7

TIA

Edited by deleted (Tue 21-Feb-12 11:31:32)

Once on 21CN the profile is calculated using the 88.2% rule and the Plusnet mirror is the same number rounded down to the next 100kbps. So a sync of 3648kbps would give a profile of 3217kbps and a Plusnet mirror of 3200kbps

Hi Routefinder,

I've placed the order now and confirmed by ticket/email. There will be an initialisation period but the router you have will be fine in its current state.

Jojo

In reply to a post by jpilson:

Hi Routefinder,

I've placed the order now and confirmed by ticket/email. There will be an initialisation period but the router you have will be fine in its current state.

Jojo

Good evening Jojo

Many thanks for sorting that out I look forward to the switchover and will advise via the Ticket as requested.

In respect of the "initialisation period" what am I likely to see i.e. is it like the 'old' one where it was advised to allow 10 days for it to settle down???

PS You mentioned one of the prime benefits of the 21CN infrastructure is the immediacy of the sync changes updating the profile.....................well this thread on the community forum does rather put AFAIK a different complexion on the rapdity of the changes.

http://community.plus.net/forum/index.php/topic,1027...

Or have I misunderstood what was being discussed & answered by Adam? It would potentially be a big letdown for all PlusNet users on the 21CN system if the changes will stil take up to 72 hours to recognise increases in sync and hence actual speed

Edited by deleted (Tue 21-Feb-12 22:55:33)

In reply to a post by Routefinder:

well this thread on the community forum does rather put AFAIK a different complexion on the rapdity of the changes.

http://community.plus.net/forum/index.php/topic,1027...

Or have I misunderstood what was being discussed & answered by Adam? It would potentially be a big letdown for all PlusNet users on the 21CN system if the changes will stil take up to 72 hours to recognise increases in sync and hence actual speed

What you have to remember is that our systems haven't changed when it comes to picking up a new BT profile. So, in the past you might have to first of all wait up to 120 hours for your BT profile to change and then another 12 hours for our system to pick up the report, so things are much much better than they were. Also, if it's a big jump and you can't/don't want to wait for our system to pick it up, you can always call/rise a ticket/ask on the forum for this to be done manually.

Jojo

In reply to a post by Routefinder:

Tried the Zen checker at it says 2.5Mbps and up to 20Mbps which AFAIK equates to ADSL2+

This seems to echo the BTW checker ???

Having read this thread, I have now managed to raise a Plusnet ticket to get my own line upgraded after which I might just manage to get a line that meets the government target of 2mbps!

(According to http://www.farina1.com/adsl/ anyway.)

In reply to a post by jpilson:

In reply to a post by Routefinder:

well this thread on the community forum does rather put AFAIK a different complexion on the rapdity of the changes.

http://community.plus.net/forum/index.php/topic,1027...

Or have I misunderstood what was being discussed & answered by Adam? It would potentially be a big letdown for all PlusNet users on the 21CN system if the changes will stil take up to 72 hours to recognise increases in sync and hence actual speed

What you have to remember is that our systems haven't changed when it comes to picking up a new BT profile. So, in the past you might have to first of all wait up to 120 hours for your BT profile to change and then another 12 hours for our system to pick up the report, so things are much much better than they were. Also, if it's a big jump and you can't/don't want to wait for our system to pick it up, you can always call/rise a ticket/ask on the forum for this to be done manually.

Jojo

Ah! the devil in the details :lol:

The BT system IP Profile falls & rises under 21CN very quickly (immmediately???) but the PlusNet system still takes approx 12 hours to pick up the changes especially affecting the upward ones where users have seen an increase in sync following a prior reduction. As you say an overall improvement by going 21CN but not "the close to perfection" which would be the cream on top

Just hope you are ready for the raft of more savvy users raising tickets to get the their speeds back up to their 'previous' level(s)???

Many thanks again and I look forward to the switch and what benefits it is intended/expected to give me.

In reply to a post by Routefinder:

Just hope you are ready for the raft of more savvy users raising tickets to get the their speeds back up to their 'previous' level(s)???

I doubt they would be any more frequent than before

Have you seen this topic on the Community forums? http://community.plus.net/forum/index.php/topic,1027...

In reply to a post by jpilson:

In reply to a post by Routefinder:

Just hope you are ready for the raft of more savvy users raising tickets to get the their speeds back up to their 'previous' level(s)???

I doubt they would be any more frequent than before

Optimist

In reply to a post by jelv:

Have you seen this topic on the Community forums? http://community.plus.net/forum/index.php/topic,1027...

Hi Jelv

That is the one I linked to and made ref to above

Well the switch over happened at approx middya today (28th Feb)

The sync is now 4256 though this is the "training" peried the measured speed still shows as 2700 odd

Oddly the Router still shows DSL Type as G.992.1 annex A still on plain vanilla Max ADSL so I wonder as the sync speed reflects ADSL2+ when will I see G.992.5 or even if I have been put on ADSL2 ths would be AFAIK type G.992.3

Incidently the remote Vendor ID is IFTN which according to Kitz is Infineon

So roll on the training period because on the happy surmise the sync holds at this level the measured speed will be well up & a great improvement But when am I likely to see the DSL Type update, any ideas???

From what I remember if the expected sync is less than about 4000kbps the provisioning process puts you on 21CN ADSL1
This gives you the benefit of the 88.2% profile system without the aggressive line management of ADSL2

Edited by deleted (Tue 28-Feb-12 21:43:28)

In reply to a post by Oldjim:

From what I remember if the expected sync is less than about 4000kbps the provisioning process puts you on 21CN ADSL1
This gives you the benefit of the 88.2% profile system without the aggressive line management of ADSL2

Grrrr!
I think you mean ADSL2+? ADSL2 is not the same thing at all. In this context it matters.

Can we see the full line stats now please?

As I understand it the only difference between ADSL2 and ADSL2+ is that ADSL2+ utilises the higher frequency band but given the line length this attenuates to the point of uselessness.
If the line is provisioned on ADSL2+ I believe that the automatic systems downgrade it to ADSL2 where appropriate
Also the aggressive line management occurs on both ADSL2 and ADSL2+ (banding for example) but not on ADSL1
A sync of 4256kbps implies an attenuation in excess of 51dB (I have presently got s sync of 4928kbps with a 50dB attenuation with nothing above about 980kHz and virtually nothing above 800kHz

Edited by deleted (Tue 28-Feb-12 22:24:49)

H both

Please see this screen grab of the router page

Router line stats page

Before the switchover these were different

Output Power up/down ~ 11.5/19.0

Line Attenuation up/down ~ 31.5/54.0

SN Margin up/down ~ 20.0/5.5

NB. I think there is probably the usual 10-day training now running, which doesn't affect your speeds but does set the important Fault Threshold Rate. So do not take any of the actions I describe below until the end of that .

Interesting that both attenuations have gone down .

You may be best staying as you are, but looking at those figures I think you could benefit by trying ADSL2 (G.993.2), simply because of the higher upload that should not affect the download.

The download is almost the highest expected on that attenuation, whichever of the three protocols are used.

Does your router let you choose what protocols to try to use? Most of the ones I know of do. If it does, I suggest that you ask Plusnet for an ADSL2+ setting, with uncapped upstream, and see what happens for a couple of days. Then reduce the ones to use to ADSL2 and ADSL, (it needs the ADSL to fall back to at bad noise times), and compare.

With ADSL2+ there is a possibility the attenuation would be around 56dB, in which case error rates would increase and connection speed be slightly lower - just under 4Mbps. With ADSL2 you should get the current sync with the higher upstream.

In reply to a post by RobertoS:

NB. I think there is probably the usual 10-day training now running, which doesn't affect your speeds but does set the important Fault Threshold Rate. So do not take any of the actions I describe below until the end of that .

Interesting that both attenuations have gone down .

You may be best staying as you are, but looking at those figures I think you could benefit by trying ADSL2 (G.993.2), simply because of the higher upload that should not affect the download.

The download is almost the highest expected on that attenuation, whichever of the three protocols are used.

Does your router let you choose what protocols to try to use? Most of the ones I know of do. If it does, I suggest that you ask Plusnet for an ADSL2+ setting, with uncapped upstream, and see what happens for a couple of days. Then reduce the ones to use to ADSL2 and ADSL, (it needs the ADSL to fall back to at bad noise times), and compare.

With ADSL2+ there is a possibility the attenuation would be around 56dB, in which case error rates would increase and connection speed be slightly lower - just under 4Mbps. With ADSL2 you should get the current sync with the higher upstream.

Good morning

The router is the Thomson TG585 v7 and as far as I can tell there is no control over the DSL type hence the reason I was surprised it was 'reporting' the plain ADSL "type".

I asked PS CSC for their take on this and they said their systen had not updated yet so as at 04:50 hrs this morning this was apparently adjusted and quote "so you should start to see some speed improvements and a change to the GMT with the next connection drop." This I surmise refers the the training protocols dropping and resetting? However what is GMT???

At ths stage I am leaving well alone for the training to do its job???

Oh, and for the life of me cannot recall the link to check my profile on PlusNet???

TIA for your insight

And Good Morning to you, and thanks for the first chuckle of the day! "so you should start to see some speed improvements and a change to the GMT with the next connection drop".

G.DMT is another name for G.992.1. So a change away from it perhaps was meant .

As for the "next connection drop", is one expected? Probably yes, as for the protocol to be changed the exchange end will be forcing a reconnection. Just a wierd wording.

I've just been browsing for 585v7 manuals online - not a fruitful search. Overrun by PN/MAAF setup guides that aren't any use. I'm sure the 585 does have that facility, but I believe it's a PN-modified firmware they issue it with, so may have been disabled. I may look again later.

The rest of my post, about comparing ADSL2+ and ADSL2 applies though, if you can get them to do it. Good luck.

https://portal.plus.net/my.html?action=data_transfer...

Thanks for the link reminder ~ it says 3Mb and this was the same as I had under ADSL Max so I have asked what was changed???

It takes a while for the PN copy IP Profile to catch up. Unfortunately it is probably limiting yoru speed to that.

I would expect a BT Performance Test to show an IP Profile of around 3.75Mbps, so the PN one should change in time to 3.7Mbps.

In reply to a post by RobertoS:

It takes a while for the PN copy IP Profile to catch up. Unfortunately it is probably limiting yoru speed to that.

I would expect a BT Performance Test to show an IP Profile of around 3.75Mbps, so the PN one should change in time to 3.7Mbps.

Well spot on the BT speed tester does indded say 3.75Mbps

Edit ~ the BT tester has update the measured speed slightly form 2.26 this morning to 2.9 now and the TBB tester shows this

Edited by deleted (Wed 29-Feb-12 18:22:42)

Might be cheating (sorry if you were waiting to see when the profile on our side was updated) but I've now changed it to 3.7 on our side manuallly. Hope it improves the connection for you, Routefinder.

In reply to a post by orbrey:

Might be cheating (sorry if you were waiting to see when the profile on our side was updated) but I've now changed it to 3.7 on our side manuallly. Hope it improves the connection for you, Routefinder.

Hi Matt

I checked this this morning and noticed the update..................and the nice uplift in measured speed to 3.1Mbps and it is still that speed this evening. So already better compared to between 2.2 to 2.8Mbps under Max ADSL.

TBB result


If once the training period is over >3.1Mbps is the new actual speed then the "promise" that ADSL2+ offered as an improvement though modest over Max ADSL will I hope have been met

I will PM a little feedback shortly.



Edit ~ but why does my Router still report the DSL type as G.992.1 annex A and not G.992.5 that would be applicable to ADSL2+ service connection???

Edited by deleted (Thu 01-Mar-12 22:20:57)

Just for the record using ther speedtest.net tester I got the following:-

Test dated 17th Feb 12

And a short while ago

Test dated 2nd March

So a good and measurable increase in speed

In reply to a post by Oldjim:

From what I remember if the expected sync is less than about 4000kbps the provisioning process puts you on 21CN ADSL1
This gives you the benefit of the 88.2% profile system without the aggressive line management of ADSL2

Given that my line has at least a 60db downstream loss, is there any reason why I should not request ADSL2+ and then configure my modem to whatever I find best?

I have no idea how that would work

Still chugging away nicely

Just for the record before I reboot the router about midday 18th March

I have had a very stable sync at 3808 for 16days 16hours and counting.

My current line speed at PlusNet is 3.3Mbps

But my measured speed here at TBB is


So the Line Speed is 88.2% of the sync rounded down to the nearest 100, so is right But based on this my measured speed seems that bit too slow or is it???

Oh, and the prime reason for the reboot of the router is because it is still reporting the DSL type as ADSL Max not ADSL2 or ADSL2+, so we shall if a reboot resolves that and indeed a reconection puts me on a slightly improved speed???

At that sort of speed I suspect ADSL1 is going to be more stable. I suspect that the modem and exchange tried to negotiate ADSL2+, found it wasn't working, dropped back to ADSL2, found that didn't work and dropped back to ADSL1. With a long line ADSL1 is going to be a lot more stable.

The benefit you are getting from WBC is now the 88.2% profiles compared to the crude bands on 20CN which penalised your speed significantly if you synced just under the lower limit if one of the bands.

In reply to a post by jelv:

At that sort of speed I suspect ADSL1 is going to be more stable. I suspect that the modem and exchange tried to negotiate ADSL2+, found it wasn't working, dropped back to ADSL2, found that didn't work and dropped back to ADSL1. With a long line ADSL1 is going to be a lot more stable.

The benefit you are getting from WBC is now the 88.2% profiles compared to the crude bands on 20CN which penalised your speed significantly if you synced just under the lower limit if one of the bands.

Thanks for the added insight about the way the 21CN functions But the odd thing is that the router never showed anything other than the ADSL Max Type even in the first 48hours when I was getting a sync of I think it was 4200'ish. Surely if "it" was working as you describe I would have seen G992.3 or G992.5 in those starting days???

Update

I rebooted the router and it now 'reports' the DSL type as G.992.3 annex A ~ so as I understand it this ADSL2 i.e. not 2+ variant. All well and good

Sync is a tad lower at 3787 with margin up 0.5 to 6.5db

Oddly the "output power" downstream says 0.0 and it was 19.0 so why is that???

Line attenuation has dropped from 53db to 52.5db

Speed has bumped slightly to 3.1:-

The default noise margin on 21CN is 3db, which would have given you that higher speed.

There is an option for ordering ADSL1 on 21CN - I'm wondering if because your line is long that is what was ordered if you never saw the other types.

:lol: that will teach me to fiddle................................there was me thinking that 21CN would behave like 20CN with a reboot a while later giving a lift because a new/better gateway.

I rebooted again (bearing in mind this was nigh on 2 hours later) and I now sync at 3671

Best leave it alone for now and see how it develops

Edit ~ another oddity I just noticed is that the CRC and FEC upstream errors jumped from 0 to 4,294,967,264 following that extra reboot, now what is that all about???

Edited by deleted (Sun 18-Mar-12 16:04:36)