Not strong no, but it seems you line is quiet. I'd say upto 25db attenuation is a 'strong' line.

I reckon you will probably get 9Mb ish - the only way of telling what kind of gain you will get by moving to ADSL2+ is by you uploading a DMT tool graph of the available bins.

I'm on a 48db line, a bit longer than yours and I gain 2Mb on ADSL1 using ADSL2, not 2+ but my line is noisy. My attenuation jumps to 51db on ADSL2+.

On a good day, without interleaving I used to sync at 7120kbps on ADSL1 with a 1db SNR. Unfortunately soon as the sun goes down my line goes wild.

Haven't tried ADSL2/2+ without interleaving but on the BT 3db default SNR it's around 6700kbps - interleaved.

I believe someone on here managed 10Mb on a 40db line but they were on UKOnline LLU with SRA enabled.

Edited by wolvesmad (Thu 02-Aug-12 10:58:10)

Mine is 39dB and I manage 12Mb but I am running at 3dB noise margin because my line is incredibly stable (and because I chose a provider where I can do that). On Sky with a 7dB margin I used to get around 10Mb.

So, provider, noise margin and stability all make a big difference around these numbers. I consider my line to be very stable for its attenuation and therefore would be surprised if a higher attenuation would be able to easily beat my line stats.

So you are tweaking like crazy because of a DLM setting of 15dB?

Your efforts would be better directed to establishing the cause, (possibly the tweaking itself forcing the line too fast in the past), and getting it back to 6dB. Then tweak more gently.

Edited by RobertoS (Thu 02-Aug-12 22:06:54)

In reply to a post by RobertoS:

So you are tweaking like crazy because of a DLM setting of 15dB?

Your efforts would be better directed to establishing the cause, (possibly the tweaking itself forcing the line too fast in the past), and getting it back to 6dB. Then tweak more gently.

It was originally 6dB but the router wasn't particularly good so I needed to reboot it a few times which forced the SNR up to 15dB.

In reply to a post by Toonshorty:

For the checker to report a figure around the 8000Kb/s you'd need an attenuation of ~30dB. While the checker could possibly be fairly conservative it is based on a 6dB target SNR so it's probably not too far away.

Are you really sure about that? You can get that speed on 40dB as you have already shown.

In reply to a post by Toonshorty:

However if I use that 30dB figure that would almost appear to be what my attenuation represents then a 33dB attenuation would sync me at 13,000Kb/s. I'm genuinely quite excited and curious to see what on earth I'll sync at with ADSL2+. Realistically I'm expecting around 11,000Kb/s sync, maybe a little less.

Your attenuation has already been reported as 43dB and it ain't going down unless you move closer to the exchange or make sure your internal wiring is top notch! If anything it will rise by 2-3dB by changing to ADSL2+.

Edited by IanBB (Fri 03-Aug-12 00:17:32)

In reply to a post by Toonshorty:

I've always considered my line to be fairly average however recently after looking at several checkers and other people's stats it would appear that my line is actually particularly good.

Here are my current statistics on ADSL Max (Will have ADSL2+ in 2 weeks).

Sync: 8000 (Goes down to 7500 during heavy noise periods)
Attenuation: 43dB
Noise Margin: 5.5dB

While most calculators aren't always accurate, to find that on the Kitz speed checker an attenuation of 43dB would normally result in a sync of around 6300 was quite impressive. For the checker to report a figure around the 8000Kb/s you'd need an attenuation of ~30dB. While the checker could possibly be fairly conservative it is based on a 6dB target SNR so it's probably not too far away.

Since TalkTalk have just unbundled my exchange I'm looking to move to XILO's Pro 24 package. I currently have an attenuation of 43dB so I expect this to reach 46dB after a switch to ADSL2+ however the checker reckons a sync of around 6800Kb/s would be the norm for 46dB attenuation. However if I use that 30dB figure that would almost appear to be what my attenuation represents then a 33dB attenuation would sync me at 13,000Kb/s. I'm genuinely quite excited and curious to see what on earth I'll sync at with ADSL2+. Realistically I'm expecting around 11,000Kb/s sync, maybe a little less.

I'd be interested to see what line stats other people are getting, maybe a 'Post your stats!' thread is in order.

I would expect between 6.5 and 8.5 Mbps on ADSL2+

On your line I would expect 8.5 given that you are already syncing at 8000 but I wouldn't be shocked if there was little / no improvement.

I think we have established his 8Mbps was only by tweaking to below 6dB margin, and that is now difficult as he has caused a rise to a DLM setting of 15dB.

I agree with you that the estimates based on a 43-46dB attenuation on ADSL2+ of something under 9Mbps seem realistic. I've no idea what the effect of over-ambitious tweaking on TT could be. 11Mbps but unstable is possible.

My realistic expectation turns out to be bang on to be honest.

11Mb/s or a little less is what I guessed and it's currently sitting at 10500Kb/s.

I've always used my DGN2000 for my old connection since the TP-Link always synced a lot slower so naturally I connected to the network with the DGN2000 first.

It synced at around 9Mb/s with a 6dB SNR however reducing this to 3dB seemed to boost it up to 10.5Mb/s. The attenuation rose from 43dB to 44.5dB which isn't so bad.

I then tried my TP-W8961ND to see how that synced and was interested to see the same 10.5Mb/s sync speed but my attenuation was reported as 49dB! The SNR margin was originally 6dB however this has fallen to 4dB with no difference in sync speed.

I thought that 7.5Mb/s @ 43dB was impressive... 10.5Mb/s @ 49dB is crazy.

Any good speed tests to check my speed? I don't trust speedtest.net, it gave me a download of 10.69Mb/s when my sync speed is 10520Kb/s.

In reply to a post by Toonshorty:

Any good speed tests to check my speed? I don't trust speedtest.net, it gave me a download of 10.69Mb/s when my sync speed is 10520Kb/s.

I'm sure ThinkBroadBand's own speed test can be relied on!

Will do TBB test once H.A.W.X 2 has downloaded.

It's £1 at the Ubi Store for today only

SNR also seems to have fallen dramatically, down at 2.3dB right now! That said the line seems perfectly stable at that speed and the sync hasn't changed at all.