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Contributor
michael37
Posts: 84
Registered: ‎21-06-2012
Accepted Solution

ADSL 2+ Noise margin

I have recently been upgraded to ADSL 2+, speeds were initially very disapointing (8Mb/s sync rate) so I followed BTs advice for non BT modems and reset it after which I got a 10.5MB/s sync rate

 

While theresulting speed boost (up from 7Mb/s sync rates) is welcome I notice that my noise margin is a little high at 8.0 - 8.5db. The line was rock solid through the 10 day testing period with no disconnects. I have tried the master socket and after 3 days again rock solid but no significant change in speed or drop in noise margin.

 

I suspect the high noise margin is a carry over from when I was on ADSLmax - as it had a similar noise margin - which itself probably resulted from when my orginal BT modem broke down resulting in a flurry of diconnects/

 

Do you guys think it is worth asking for my noise margin to be reset to see if I can get a little more out of the connection - I'll admin that it would be nice to see a double figures download speed.

 

Speed test results:

 

Results Image not loaded



1. Best Effort Test:  -provides background information.

 Download  Speed
 8.73 Mbps
  
0 Mbps21 Mbps
Max Achievable Speed

 

 Download speedachieved during the test was - 8.73 Mbps
 For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.
 IP Profile for your line is - 9.39 Mbps


2. Upstream Test:  -provides background information.

 Upload Speed
 0.69 Mbps
  
0 Mbps0.83 Mbps
Max Achievable Speed

 

Upload speed achieved during the test was - 0.69Mbps
 Additional Information:
 Upstream Rate IP profile on your line is - 0.83 Mbps

 

I am on a netgear modem router so I don't get the amount of stats one gets from a hub but here is what I have:

 

System Up Time 76:10:41

PortStatusTxPktsRxPktsCollisionsTx B/sRx B/sUp Time
WANPPPoA5893998073610349301376:09:13
LAN10M/100M2034000091076:10:23
WLAN11M/54M/150M7573965800440337650251:45:33

 

ADSL LinkDownstreamUpstream
Connection Speed10648 Kbps888 Kbps
Line Attenuation34.4 dB18.2 dB
Noise Margin8.3 dB13.1 dB
Sage
imjolly
Posts: 37,824
Registered: ‎27-01-2010

Re: ADSL 2+ Noise margin

[ Edited ]

I would ask to get noise margin reset to 6db which will increase your connection speed   for your attenuation I would expect about 11.5/12mb

 

contact mods



can take up to 3 working days for mods to contact you

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Contributor
michael37
Posts: 84
Registered: ‎21-06-2012
0

Re: ADSL 2+ Noise margin

Thank you for the quick response! I have put my request in and will post back the result once I get a response.

 

I will admit that with FTTC or FTTP not likely to reach my exchange for a few years (at least) effectivly doubling my connection speed (from adslMax) will be quite nice.

Sage
imjolly
Posts: 37,824
Registered: ‎27-01-2010
0

Re: ADSL 2+ Noise margin

I have same problem with FTTC so need to make best of adsl2+

 

post new stats after noise margin reset please - just like to see new figures

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Contributor
michael37
Posts: 84
Registered: ‎21-06-2012
0

Re: ADSL 2+ Noise margin

[ Edited ]

Thanks for your helkp guys!

 

One of the moderators has reset by broadband profile and I seem to have gained an extre 1Mb/s, the upstream speeds have also impreved somewhat.

 

Current stats:

 

1. Best Effort Test:  -provides background information.

 Download  Speed
 9.58 Mbps
  
0 Mbps21 Mbps
Max Achievable Speed

 

 Download speedachieved during the test was - 9.58 Mbps
 For your connection, the acceptable range of speeds is 4 Mbps-21 Mbps.
 IP Profile for your line is - 10.3 Mbps


2. Upstream Test:  -provides background information.

 Upload Speed
 0.96 Mbps
  
0 Mbps0.83 Mbps
Max Achievable Speed

 

Upload speed achieved during the test was - 0.96Mbps
 Additional Information:
 Upstream Rate IP profile on your line is - 0.83 Mbps



 

ADSL LinkDownstreamUpstream
Connection Speed11672 Kbps1159 Kbps
Line Attenuation34.4 dB18.2 dB
Noise Margin5.2 dB5.7 dB

 

One final question. Does resetting my profile put the line back in a 10 day testing period?

Sage
john46
Posts: 41,669
Registered: ‎21-06-2010
0

Re: ADSL 2+ Noise margin

it is best just now to leave the connection to settle after a noise margin reset but there is no training period as such
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Aspiring Expert
lovelylisa22
Posts: 161
Registered: ‎01-06-2012
0

Re: ADSL 2+ Noise margin

I got put on ADSL2+ on the 26th June and my noise margin is always about 7db but I'm getting loads of errors.  It's only restarted 3 times so far and not gone past 12.39Mbps yet :smileysad:

 

Hopefully it will go up by Friday when the ten day period is up and I'll stop getting errors although I don't know whether or not that's the case.

Sage
john46
Posts: 41,669
Registered: ‎21-06-2010
0

Re: ADSL 2+ Noise margin

@ lovely lisa
once your line training is completed then we can look at trying to improve your connection and getting the errors down
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Aspiring Expert
lovelylisa22
Posts: 161
Registered: ‎01-06-2012
0

Re: ADSL 2+ Noise margin

I'm thinking about looking into bellwire removal after friday but the socket is quite old and doesn't look like any in the videos so i'll have to upload a picture first if it doesn't get better

Sage
john46
Posts: 41,669
Registered: ‎21-06-2010
0

Re: ADSL 2+ Noise margin

ok no problem
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