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Standard User baby_frogmella
(fountain of knowledge) Wed 12-Jul-17 13:34:03
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Re: Speed increase?


[re: RobertoS] [link to this post]
 
In reply to a post by RobertoS:
In reply to a post by Realalemadrid:
Noise margin reduction to 3dB has been happening on ADSL2+ for a long time, well before the FTTC version.
On BT Wholesale connections. Is Supanet on one, or is it LLU-based?


AAISP also allow 3db noise margin on TallkTalk based ADSL2+ lines:

3dB is now supported! As of November 2015 customers can request a 3dB profile. The process is a little long winded, but once a Support staff member picks up the task 3dB can be applied within a few minutes. Do contact us.


https://support.aa.net.uk/TalkTalk_Wholesale_Line_Pr...

FluidOne FTTP On Demand 330/30 Mbps
Standard User Zarjaz
(eat-sleep-adslguide) Wed 12-Jul-17 13:58:48
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Re: Speed increase?


[re: ian72] [link to this post]
 
As Realmadrid rightly says, if a BTw ADSL 2+ circuit is viewed by DLM as super stable, then it will tweak down to a 3db target .... has done so for many years.

Used to cause problems with Cisco modem/routers which (for reasons beyond my ken) would not sync on a 3db target .... though not seen this fault for a few years now.

In absence of any further posts from the OP I guess we'll never know. My opening reply was just a hunch based on a clearly very short line.

Standard User ian72
(eat-sleep-adslguide) Wed 12-Jul-17 14:09:20
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Re: Speed increase?


[re: Zarjaz] [link to this post]
 
Fair enough. I knew ISPs could change the target SNR on ADSL but didn't realise DLM was setup to do it automatically - maybe it was after I moved to FTTC.


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Standard User RobertoS
(elder) Wed 12-Jul-17 15:56:05
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Re: Speed increase?


[re: Zarjaz] [link to this post]
 
My point however being that realmadrid did not specify BTW circuits. Which on ADSL2+ are a minority of the connections. As opposed to FTTC where 100% are Openreach.

My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - AAISP Home::1 80/20. Sync 71288/12440Kbps @ 600m. BQMs - IPv4 & IPv6
Standard User Realalemadrid
(regular) Wed 12-Jul-17 16:01:50
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Re: Speed increase?


[re: RobertoS] [link to this post]
 
Still being pedantic, but that seems to be par for the course. Why did I need to specify BTW circuits, it was a general comment and nothing to do with all FTTC circuits being BTOR, also I wonder how you could prove it is for a minority of ADSL2+ circuits?

Edited by Realalemadrid (Wed 12-Jul-17 16:23:01)

Standard User bobmeades
(newbie) Wed 12-Jul-17 20:27:30
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Re: Speed increase?


[re: Zarjaz] [link to this post]
 
In reply to a post by Zarjaz:
As Realmadrid rightly says, if a BTw ADSL 2+ circuit is viewed by DLM as super stable, then it will tweak down to a 3db target .... has done so for many years.

Used to cause problems with Cisco modem/routers which (for reasons beyond my ken) would not sync on a 3db target .... though not seen this fault for a few years now.

In absence of any further posts from the OP I guess we'll never know. My opening reply was just a hunch based on a clearly very short line.

What reading EXACTLY do you need from my router - a Netgear 3300 I think,
But thanks for all your replys, interesting.
Standard User MHC
(sensei) Wed 12-Jul-17 21:06:25
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Re: Speed increase?


[re: baby_frogmella] [link to this post]
 
That requires a manual intervention. BT does it automatically and if your line then becomes unstable it will revert to 6dB.


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M H C


taurus excreta cerebrum vincit
Standard User Zarjaz
(eat-sleep-adslguide) Wed 12-Jul-17 21:29:15
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Re: Speed increase?


[re: bobmeades] [link to this post]
 
Sync rate, SNR, attenuation please.

Standard User bobmeades
(newbie) Wed 12-Jul-17 22:39:56
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Re: Speed increase?


[re: Zarjaz] [link to this post]
 
ADSL Link Downstream Upstream
Connection Speed 24512 kbps 1022 kbps
Line Attenuation 14.5 db 6.8 db
Noise Margin 2.6 db 9.9 db
Standard User MHC
(sensei) Wed 12-Jul-17 23:11:59
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Re: Speed increase?


[re: bobmeades] [link to this post]
 
Zarjaz appears to have been correct. Your Noise Margin (SNR) at 2.6 suggests you are now on a stable connection with a 3dB target. If you monitor for a day or two you will see the 2.6 figure increase to 3dB or maybe a little more, then drop back down to 2,.6 or so. Then repeat on a 24 hour cycle!


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M H C


taurus excreta cerebrum vincit
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