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Standard User Red_Dragon23
(newbie) Fri 15-Feb-13 21:17:33
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Constant unexpected Internet Drops


[link to this post]
 
Hi,
I my ISP is AOL UK on BT phone line. I use a Belkin N600 router. The internet connection seems to constantly drop through out the day. I have found these ADSL stats on the router. Is there any problem with these?

ADSL
Type:Interleave Path
Status:Show Time
Downstream Upstream
Data Rate (kbps) 13253 448
Noise Margin (dB) 5.0 36.1
Attenuation (dB) 27.3 13.9
Output power(dbm) 20.4 12.2

Thanks,
Red_Dragon23
Administrator MrSaffron
(staff) Fri 15-Feb-13 21:22:40
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Re: Constant unexpected Internet Drops


[re: Red_Dragon23] [link to this post]
 
Based on http://www.coolwebhome.co.uk/calc/calculator.php

Your connection is just below expected range, and I guess its AOL LLU due tot he slow upstream.

So your speed does suggest there may be some instability, first step is to eliminate the phone wiring in the home by using the test socket that is accessed by removing the lower half of the master socket, which then disconnects all extension wiring in the property.

See the stats when you do that may help us to advise on next course of action.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User Red_Dragon23
(newbie) Tue 19-Feb-13 20:29:25
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Re: Constant unexpected Internet Drops


[re: MrSaffron] [link to this post]
 
The internet has still been dropping since and the SNR got down as low as 3dB when I check up on it.
Here's the results using the test socket.
Screenshot of ADSL Stats using test socket
After reinserting the front plate again and here's the stats.
Stats using socket - Start
And Hour later...
Stats using the Socket - 1 Hour Later

Red_Dragon23


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Administrator MrSaffron
(staff) Tue 19-Feb-13 23:52:54
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Re: Constant unexpected Internet Drops


[re: Red_Dragon23] [link to this post]
 
The link to test socket stats did not work, the other two did

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User XRaySpeX
(eat-sleep-adslguide) Wed 20-Feb-13 00:34:29
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Re: Constant unexpected Internet Drops


[re: Red_Dragon23] [link to this post]
 
In reply to a post by Red_Dragon23:
Here's the results using the test socket.
Screenshot of ADSL Stats using test socket
Don't have your login for this.

Just copy & paste ADSL section; that is all we need.

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 XRaySpeX
(eat-sleep-adslguide) Wed 20-Feb-13 00:38:20
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Re: Constant unexpected Internet Drops


[re: Red_Dragon23] [link to this post]
 
You should be getting 17 Meg sync. I get 19 on same attenuation but lower 3 dB NM.

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 Red_Dragon23
(newbie) Wed 20-Feb-13 06:24:45
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Re: Constant unexpected Internet Drops


[re: MrSaffron] [link to this post]
 
Oh here's the stats:

ADSL
Type Interleave Path
Status Show Time

Downstream Upstream
Data Rate (kbps) 15615 448
Noise Margin (dB) 9.0 33.1
Attenuation (dB) 26.9 13.7
Output power(dbm) 20.4 12.3

NEW LINK TO IMAGE
Standard User XRaySpeX
(eat-sleep-adslguide) Wed 20-Feb-13 21:57:59
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Re: Constant unexpected Internet Drops


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
Based on http://www.coolwebhome.co.uk/calc/calculator.php
I am confused, puzzled and unconfident by your calculator.

I enter 20143 K, 26dB Attn, 3dB NM and get the result:
Estimated connection speed using ADSL2+ mode (maximum 24 Mbps)

Normal speed range at 26dB attenuation is 15000 Kbps to 18000 Kbps
Target Margin Estimate
9dB 9456
6dB 13801
3dB 20143
  1. The Normal speed range is patently untrue, as I'm getting faster, unless it means the range of the population of users at this attenuation connecting with the standard NM of 6 dB. In which case, it should make that clear.
  2. On the Estimates at various NMs: The one @ 3dB is obviously a restatement of my input figures. The others @ 6 & 9 dB seem far too low. In my case I have got about 17 Meg @ 6dB NM ant 15 Meg @ 9 dB NM.


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
Administrator MrSaffron
(staff) Wed 20-Feb-13 22:30:36
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Re: Constant unexpected Internet Drops


[re: XRaySpeX] [link to this post]
 
So a sample of one makes a tool useless?

A 20143 sync at 26dB attenuation is pretty exceptional and the calculator is about giving mid range expectations, not the odd exceptional line. Perhaps your line is not normal, and the 3dB margin can sometimes be worth a lot more, particularly as the fall off of ADSL2+ is very steep.

Andrew Ferguson, andrew@thinkbroadband.com
www.thinkbroadband.com - formerly known as ADSLguide.org.uk
The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User XRaySpeX
(eat-sleep-adslguide) Wed 20-Feb-13 23:09:51
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Re: Constant unexpected Internet Drops


[re: MrSaffron] [link to this post]
 
Sorry, but I really think it is suspect.

Granted my line may be exceptional smile, I put in the Kitz figures, which I understand is meant also to cater for mid-range expectations, for my 26 dB attn. line: 17600 K, 26dB attn., 6dB NM and get the results:
Estimated connection speed using ADSL2+ mode (maximum 24 Mbps)

Normal speed range at 26dB attenuation is 15000 Kbps to 18000 Kbps
Target Margin Estimate
9dB 12059
6dB 17600
3dB 22800

Slightly low
This predicts a fantastic +/- 5 Meg gain of speed per -/+ 3 dB delta in NM. Furthermore it predicts my actual speed @ 3 dB NM as slightly below its estimate and so can no longer be regarded as exceptional.

I would not expect them to be identical, but I would be extremely surprised that 2 reputable estimators, yours & Kitz's, would produce vastly different results.

Sorry again, but I think you really need to look at 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
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