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Standard User Seansmit17
(eat-sleep-adslguide) Thu 01-Mar-12 08:25:55
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Re: Upgrading from 8 to 20mbps WBC


[re: wolvesmad] [link to this post]
 
drop down to 0.5?

if you did that you wouldn't get a connection 3db is the lowest you can go and still maintain a connection

BT 8MB
Standard User XRaySpeX
(eat-sleep-adslguide) Thu 01-Mar-12 08:40:42
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Re: Upgrading from 8 to 20mbps WBC


[re: Seansmit17] [link to this post]
 
Others have proved you can on a very stable line, altho' I personally wouldn't risk it.

1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
Standard User RobertoS
(sensei) Thu 01-Mar-12 10:23:04
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Re: Upgrading from 8 to 20mbps WBC


[re: Seansmit17] [link to this post]
 
In reply to a post by Seansmit17:
drop down to 0.5?

if you did that you wouldn't get a connection 3db is the lowest you can go and still maintain a connection
I could quite happily run an O2 LLU line at under 1dB during the daytime if sync'ed in the daytime, or at 1.5dB during the night if sync'ed at night.

In practice I used to tweak as low as 0.3dB and put up with two or three reconnections, as those didn't bother me and every re-sync, whenever it occurred, was faster than a 3dB margin would have given me.

Fot the poster wishing to tweak to 0.5dB, he clearly means for the period needed to download something in particular. He obviously knows what he is doing, as I did, and finds/found it useful.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.


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Standard User RobertoS
(sensei) Thu 01-Mar-12 10:27:07
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Re: Upgrading from 8 to 20mbps WBC


[re: wolvesmad] [link to this post]
 
In reply to a post by wolvesmad:
From the line profiling and ADSL2 standard we probably would.

If doing a big download I could drop my SNR down to 0.5db and take advantage of faster speeds, unlike ADSL1 where it takes hours and hours for the profile to change.
You'll have seen my reply to seansmit17. There is a complication though in your case.

On an ADSL2+ line there is usually greater sensitivity to noise, so you may cause more disconnections than you are used to. The IP Profile adjustment is fine, but you would need to watch out for triggering a target noise margin rise.

My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost. Internet connection - Plusnet Value Fibre.

"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
Standard User adslmax
(fountain of knowledge) Mon 12-Mar-12 00:52:35
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Re: Upgrading from 8 to 20mbps WBC


[re: RobertoS] [link to this post]
 
I had stable 0.2dB SNR for 34 days without disconnection and my sync rate went up to 19135Kbps from 8128Kbps from ADSL1 to ADSL2+ as I tweak my netgear from 6dB to 0.2dB. Fastest 16.4 Meg at all times smile

plusnetADSL2+16.4 Meg
My Broadband Speed Test

Edited by adslmax (Mon 12-Mar-12 00:54:47)

Standard User wolvesmad
(fountain of knowledge) Wed 18-Apr-12 14:25:15
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Re: Upgrading from 8 to 20mbps WBC


[re: RobertoS] [link to this post]
 
Yeah I have heard about ADSL2+ causing re-syncs.

Thankfully the line is very quiet during the day and that is when I will be looking to tweak the SNR to gain a couple of extra megs.

On ADSL1 I can hit 7120kbps @ 0.5db SNR and it will happy run until around an hour after sunset and then the noise kicks in and I drop the SNR to 5db and it will run at 5120kbps for months.

WBC is now available on my exchange and I have placed a regrade my line.

What kind of frequencies am I looking at on my DMT graph to see if I would gain anything on ADSL2+?

I was thinking of just running it on ADSL2 unless I am planning a big download as that handles noise better according to some.

-

Xilo.net Office 8Mb
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