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Standard User duck_power
(newbie) Wed 09-May-12 21:23:58
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speed less than half what it used to.


[link to this post]
 
hi my broadband speed for the last 6 months has been 2.4 - 2.7 meg on adslMax but about but about 2-3 weeks ago it gone down to 0.4-0.7 around the same time my old belkin n1 router died (dont know if this has anyting to do with it) i then used a cheap belkin G router for a week then got a new tp-link td-w8960n N router. a friend said it might have somthing to do with the sync rate and sent me a link to a speed checker but i couldnt really understand it the tp link rout seemed to have different names for everything,
it wanted to know the sync speed kbps, attenuation dB and noise margin dB

downstream/ upstream
Line Coding(Trellis): On On
SNR Margin (0.1 dB): 103 170
Attenuation (0.1 dB): 635 310
Output Power (0.1 dBm) 183 119
Attainable Rate (Kbps): 2848 912

does this look right?
Administrator MrSaffron
(staff) Wed 09-May-12 23:00:26
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Re: speed less than half what it used to.


[re: duck_power] [link to this post]
 
The bit we need is missing, and that is the actual connection/sync speed.

The Attainable rate is NOT that, even though it is in Kbps, the Attainable Rate is what the router thinks it can do, if left to run freely. The 10.3dB noise margin suggests that line may not have been fully stable.

Are there any other figures with Kbps units in the interface?

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 09-May-12 23:59:36
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Re: speed less than half what it used to.


[re: duck_power] [link to this post]
 
In reply to a post by duck_power:
sent me a link to a speed checker but i couldn't really understand it the tp link rout seemed to have different names for everything,
Try this: http://www.kitz.co.uk/adsl/max_speed_calc.php . It only needs Attenuation. But with your long line you can only get about 2 Meg Sync.

We need your Actual Rate (this is the Sync) not the Attainable Rate, as explained.

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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Administrator MrSaffron
(staff) Thu 10-May-12 09:22:34
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Re: speed less than half what it used to.


[re: XRaySpeX] [link to this post]
 
Cough 63.5dB attenuation, it could be 64 it could be 90. We don't know.

The attainable rate suggests it is close to 63.5dB though.

Reasoning: Most routers store a maximum attenuation of 63 or 63.5dB.

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) Thu 10-May-12 13:04:45
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Re: speed less than half what it used to.


[re: MrSaffron] [link to this post]
 
I know! But OP did say he was achieving up to 2.7 Meg, so router can't be that far off the scale.

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) Thu 10-May-12 13:42:48
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Re: speed less than half what it used to.


[re: XRaySpeX] [link to this post]
 
We can't be sure the line had not had some repair work,that added 0.5km of attenuation of course...

The sync so low, with a 10dB margin, and the attainable suggest a noise issue may be to blame.

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 duck_power
(newbie) Thu 10-May-12 18:52:02
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Re: speed less than half what it used to.


[re: duck_power] [link to this post]
 
hi thanks for the help here is the rest of the info on the router cant see sync rate just "rate (kbps)" is that it?
Path 0 Path 1
Downstream Upstream

Rate (Kbps): 2592 448 0 0

K (number of bytes in DMT frame): 82 15 0 0
R (number of check bytes in RS code word): 12 4 0 0
S (RS code word size in DMT frame): 2.00 4.00 0.0 0.0
D (interleaver depth): 16 8 0 0
Delay (msec): 8.00 8.00 0.0 0.0
INP (DMT symbol): 0.55 0.21 0.0 0.0

Super Frames: 4691326 10092552 0 0
Super Frame Errors: 0 0 0 0
RS Words: 159505084 171573384 0 0
RS Correctable Errors: 293991 0 0 0
RS Uncorrectable Errors: 380 0 0 0

HEC Errors: 0 45 0 0
OCD Errors: 0 0 0 0
LCD Errors: 0 0 0 0
Total Cells: 1048892593 0 0 0
Data Cells: 57969299 0 0 0
Bit Errors: 0 0 0 0

Total ES: 83 0
Total SES: 0 0
Total UAS: 11 11
Standard User duck_power
(newbie) Thu 10-May-12 19:00:32
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Re: speed less than half what it used to.


[re: MrSaffron] [link to this post]
 
In reply to a post by MrSaffron:
We can't be sure the line had not had some repair work,that added 0.5km of attenuation of course...

The sync so low, with a 10dB margin, and the attainable suggest a noise issue may be to blame.


the cabnet i am connected to was due to be upgraded to fibre on 29th of june this year or so the bt wholesale checker said a couple of weeks ago but last i checked the date was removed and the bit about it being upgraded, would that have anything to do with it
also when i do a speed test it seems to jump about abit like 0.3, 0.4, 0.7, 0.5 etc..

Edited by duck_power (Thu 10-May-12 19:06:50)

Administrator MrSaffron
(staff) Thu 10-May-12 19:43:57
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Re: speed less than half what it used to.


[re: duck_power] [link to this post]
 
Yeap rate is it

2592 Kbps downstream connection speed
448Kbps upstream

What speeds are you getting? Double check your IP Profile at www.speedtester.bt.com if the value is under 2Meg (2000Kbps), then you've probably got a line that is wandering around speed rise.

Keep an eye on the rate figure, and in particular see if it changes much once the sun has set.

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.
Administrator MrSaffron
(staff) Thu 10-May-12 19:44:52
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Re: speed less than half what it used to.


[re: duck_power] [link to this post]
 
That should not affect you, the fibre upgrades that is.

If your line has a dodgy connection, then when pushing the tubing through the duct you may get a disconnect or two, but no change beyond that.

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.
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