New Router Attenuation
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- Re: New Router Attenuation
New Router Attenuation
23-08-2010 7:58 PM
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The Belkin reported an attenuation of 44.5dB, the D-Link 34dB.
Why the difference?
Re: New Router Attenuation
23-08-2010 8:00 PM
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Re: New Router Attenuation
23-08-2010 8:11 PM
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If it is a matter of accuracy, rather than a change in actual levels, then which router is indicating correctly ?
Re: New Router Attenuation
23-08-2010 8:17 PM
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Re: New Router Attenuation
23-08-2010 8:32 PM
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I have not got a clue, It's either my suggestion or a line fault.
Quote from: purleigh That is a huge difference, approximately ten times more signal than before !
If it is a matter of accuracy, rather than a change in actual levels, then which router is indicating correctly ?
Re: New Router Attenuation
23-08-2010 8:35 PM
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Re: New Router Attenuation
23-08-2010 8:39 PM
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Then 44.5dB gives an ADSL2+ sync speed of 7552Kbps, whereas 34dB corresponds to a sync speed of 12352Kbps.
So it will be interesting to see if your connection speed changes rate after a few days !
Re: New Router Attenuation
23-08-2010 9:39 PM
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ADSL STATISTICS
Mode: ADSL2 PLUS
Type: ANNEX_A
Status: Showtime
Downstream Upstream
Rate (Kbps): 6655 kbps 444 kbps
SNR Margin (dB): 1.2 18.5
Attenuation (dB): 34.0 16.5
Output Power (dBm): 0.0 12.3
Super Frames: 627766 627767
RS Correctable Errors: 44340 0
RS Uncorrectable Errors: 54 65510
HEC Errors: 97 0
Total Cells: 62828 84162
Data Cells: 2023233 411842
Bit Errors: 0 0
The SNR margin on my old router was 6dB which was the value on this router when I installed it, not now though, currently showing at 0.5.
Re: New Router Attenuation
23-08-2010 10:02 PM
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Is there a firmware update for it
Re: New Router Attenuation
23-08-2010 10:13 PM
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Why do say the results seem to be spurious?
Re: New Router Attenuation
23-08-2010 10:23 PM
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The speed/noise margin is what you would expect from an attenuation as reported by the Belkin
The speed/attenuation and noise margin for the upstream don't match either. You should be seeing a much higher noise margin.
During daylight hours can you try the Beliin again and report the full stats. If possible use the cable you were using with the Belkin assuming you changed it when you changed to the D-Link
Re: New Router Attenuation
23-08-2010 10:32 PM
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As a matter of interest why the distinction between daylight and the hours of darkness?
Re: New Router Attenuation
23-08-2010 10:53 PM
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The theory is that because the connection will always be subject to a certain level of interference and general noise, you should try and do it when the noise is at it's lowest.
Generally evening and night time are the noisiest times, and breakfast time and evening there tends to be lots of things getting switched on and off in your house.
So the advice is generally -
Leave your router switched on at all times, to avoid the exchange thinking the on/off transitions are line noise.
If you are trying to raise your sync speed, leave the router on for at least 72 hours, then switch it off for about 30 minutes, and then switch it on between 10:00am and 12:00 midday, and then leave it on.
Re: New Router Attenuation
23-08-2010 10:59 PM
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I'm wondering whether you have the router plugged into an extension socket, rather than the master socket (where the phone line comes into your house).
Having normal audio grade extension wiring WILL have a detrimental effect on your router stats, particularly if it is acting as an aerial picking up noise - which might explain your slightly unusual figures ?
Re: New Router Attenuation
23-08-2010 11:52 PM
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Quote from: Oldjim The downstream attenuation, noise margin and speeds just don't match
From my own experience the SNRM does not make much sense when on a banded profile. I had when banded a sync rate of 2262 at 6dB then had the banding removed now sync at 3652 with a 15dB margin. Having said that I would not expect to see such a major difference with the attenuation between the 2 modems.
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