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scaiels
Aspiring Contributor
558 Views
Message 1 of 6

Time for a Target SNR Margin reset?

Hi,

 

This is a follow on from post http://community.bt.com/t5/BB-Speed-Connection-Issues/Another-spped-issue-100k-out-of-a-potential-60...

 

With Forum and Mod help, it’s come a long way since then and is now stable at 4mb to 5mb depending on which speedtest I do. Thanks to everyone that set me on the right path.

 

However, noise margin is stuck at 15db, so I think I need to ask for Mod help again and need to leave details here for them to look at!

 

HH3 router is connected directly to a ADSL V1.0 faceplate via twisted pair ADSL cable.

HH3 is powered from a Tacima rfi filtered power block.

 

From the results below, I’m thinking I should ask for interleaved to be turned back on and a target noise margin reset? Does that sound sensible?

 

Line attenuation is 30db.

 

Key:

Connection Time, Interleaving, Downstream Connection, Downstream Noise Margin, Speedtest.net results, BT speedtester results.

 

10th December – Wiring and position sorted for HH3

00d00h00m, Fast, 5.031Mbps, 15db 3.98Mbps @ 38ms

02d01h25m, Fast, 5.031, 14.9db, 3.95Mbps @ 35ms

03d01h37m, Fast, 5.031, 15.8db, 4.33Mbps @ 34ms

 

13th December - Unforced reconnect during stormy weather

00d03h54m, Fast, 5.031, 15.6db, 4.45Mbps @ 32ms

01d16h42m, Fast, 5.031,9.4db 

07d05h33m, Fast, 5.031, 14.5, 4.9Mbps @ 25ms,

 

25th December - Unforced reconnect after 11 days

02d09h37m, Fast, 5.031, 15.7db, 4.67Mbps @ 31ms

08d12h17m, Fast, 5.031, 15.9db

 

3rd January, Manual Reset after 8 days to check Target Noise Margin.

00d00h00m, Fast, 5.031, 15.2db, 4.79Mbps @ 55ms, 4075Kbps @ 4500

00d22h55m, Fast, 5.031, 14.7db, 4.53Mbps @ 29ms, 4125Kbps @ 4500

07d02h40m, Fast, 5.031, 14.6db, 5.15Mbps @ 25ms, 4127Kbps @ 4500

 

Many thanks again,

Steve.

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5 REPLIES 5
Distinguished Sage
Distinguished Sage
539 Views
Message 2 of 6

Re: Time for a Target SNR Margin reset?

I would agree and contact the mods to get your noise margin reset to 6db and corresponding increase in speed.  you could get changed to interleaved or just leave and see what affect the noise margin reset has and if required then get latency changed to interleaved  http://bt.custhelp.com/app/contact_email/c/4951




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Distinguished Sage
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Message 3 of 6

Re: Time for a Target SNR Margin reset?

hi you need to show 3 days stable connection and then contact the mods your self to get the reset done and also be moved to interleaving if you want that doing this is a link to them
http://bt.custhelp.com/app/contact_email/c/4951
they normally reply by email or phone directly to you within 72 hours

They are a UK based BT specialist team who have a good record at getting problems solved
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scaiels
Aspiring Contributor
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Message 4 of 6

Re: Time for a Target SNR Margin reset?

Will Do. Thanks.
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mrrovis
Beginner
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Message 5 of 6

Re: Time for a Target SNR Margin reset?

Throughout 2010 my sync speed was typically 7232kbps and my IP Profile at 6000kbps. During the past 15 months we have experienced three significant line faults (one by a fencing contractor driving a post through a cable and two due to lines through trees being damaged during storms). On each of these occasions my IP Profile dropped to less than 1000kbps but of course recovered when the faults were repaired. After the first two faults the IP Profile only recovered to 5500kbps, disappointing but didn't seem worth worrying about. However, after the last fault (during which IP Profile fell to 250kbps, it only recovered to 5000kbps.

 

From some notes I made during 2010 (when my IP Profile was at 6000kbps), I see that my downstream Noise Margin was 12.2dB. It is now 15.4dB. I had assumed that, like IP Profile, this was a parameter that was automatically adjusted in the bRAS.

 

From posts I have read on this forum it would appear that the SNR Margin can 'get stuck' - If so, how do I get it reset.

 

 

ADSL line status

Connection information
Line stateConnected
Connection time43 days, 8:28:16
Downstream6,048 Kbps
Upstream448 Kbps

 

ADSL settings
VPI/VCI0/38
TypePPPoA
ModulationITU-T G.992.1
Latency typeFast
Noise margin (Down/Up)15.2 dB / 20.0 dB
Line attenuation (Down/Up)32.0 dB / 18.0 dB
Output power (Down/Up)19.8 dBm / 12.1 dBm
Loss of Framing (Local)0
Loss of Signal (Local)0
Loss of Power (Local)0
FEC Errors (Down/Up)0 / 0
CRC Errors (Down/Up)63768 / N/A
HEC Errors (Down/Up)N/A / 68
Error Seconds (Local)61339

 

Our exchange is ADSL Max

I am 2500m (measured line length) from the exchange

My ISP is BT

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Distinguished Sage
Distinguished Sage
459 Views
Message 6 of 6

Re: Time for a Target SNR Margin reset?

contact the mods and ask for NM to be reset to 6

contact mods



can take up to 3 days for mods to contact you



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