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)