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Author Topic: help with stats  (Read 2239 times)

kenny

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help with stats
« on: May 11, 2014, 09:06:30 AM »

Hi
do the stats below indicate any problems I'm using dslstats so can supply more info if required.

xdslctl info --pbParams
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 5739 Kbps, Downstream rate = 52940 Kbps
Bearer: 0, Upstream rate = 5744 Kbps, Downstream rate = 43768 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2093)
DS: (41,857) (1218,1959)
                  VDSL Port Details               Upstream                Downstream
Attainable Net Data Rate:            5739 kbps              52940 kbps
Actual Aggregate Tx Power:             2.6 dBm               12.6 dBm
====================================================================================
  VDSL Band Status   U0   U1   U2   U3   U4   D1   D2   D3
  Line Attenuation(dB):   3.5   43.3   61.6   N/A   N/A   19.6   52.7   82.4
Signal Attenuation(dB):   3.4   43.3   0.0   N/A   N/A   25.1   52.4   N/A
        SNR Margin(dB):   6.9   6.0   0.0   N/A   N/A   6.3   6.3   N/A
         TX Power(dBm):   -4.4   0.2   -4.0   N/A   N/A   11.1   7.4   N/A

kenny
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Bald_Eagle1

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Re: help with stats
« Reply #1 on: May 11, 2014, 09:18:52 AM »

Hi
do the stats below indicate any problems I'm using dslstats so can supply more info if required.

Code: [Select]
xdslctl info --pbParams
xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 5739 Kbps, Downstream rate = 52940 Kbps
Bearer: 0, Upstream rate = 5744 Kbps, Downstream rate = 43768 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2093)
DS: (41,857) (1218,1959)
                  VDSL Port Details               Upstream                Downstream
Attainable Net Data Rate:            5739 kbps              52940 kbps
Actual Aggregate Tx Power:             2.6 dBm               12.6 dBm
====================================================================================
  VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 3.5 43.3 61.6 N/A N/A 19.6 52.7 82.4
Signal Attenuation(dB): 3.4 43.3 0.0 N/A N/A 25.1 52.4 N/A
        SNR Margin(dB): 6.9 6.0 0.0 N/A N/A 6.3 6.3 N/A
         TX Power(dBm): -4.4 0.2 -4.0 N/A N/A 11.1 7.4 N/A



kenny


It looks O.K. to me (unless you are only 100m from the cabinet, in which case it would be pretty poor).


It is currently around the max achieveable sync speeds as SNRM is around 6dB for each usable band.

Do you know the distance to the cabinet?


Your Hlog graph should have a smooth curved decline.
If it contains any peaks/troughs, it would indicate a physical wiring problem such as bridged taps etc.

Your QLN graph might show a lot of spikes that would indicate noise interference.

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kenny

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Re: help with stats
« Reply #2 on: May 11, 2014, 11:35:12 AM »

hope this is what you require
I'm around 800-900m from cab don't know exact but line follows the road
line was fitted around 25 years ago
Internal line is around 60ft long from dropwire in loft to master socket no extensions although internal cable has 3 joins in it (jelly crimps) as various engineers wouldn't put a new cable stating they where not allowed to do lofts anymore.

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Bald_Eagle1

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Re: help with stats
« Reply #3 on: May 11, 2014, 12:34:09 PM »

hope this is what you require
I'm around 800-900m from cab don't know exact but line follows the road



Everything looks quite good then for that distance.
Some users are half that distance, but achieving poorer speeds than your connection.



Quote
line was fitted around 25 years ago
Internal line is around 60ft long from dropwire in loft to master socket no extensions although internal cable has 3 joins in it (jelly crimps) as various engineers wouldn't put a new cable stating they where not allowed to do lofts anymore.

There are no visible 'problems' in your Hlog & QLN graphs.


It's worth monitoring the stats over a long period, to see how things go.
You now have a set of base data to compare against.



If you are connected to a newish cabinet, with few other users, it's likely that your sync speeds will reduce in time as more users are connected, increasing the effects of crosstalk.

Over a 12 month period, my 1050m connection took a hit (in small visible stages) of around 10 Mbps on DS sync speed (from 30 Mbps to 20 Mbps).
My cabinet is now almost full (according to an engineer who visited to investigate my speed loss), so things shouldn't really worsen for me.


My connection has recently gone back to fastpath (from ain Interleaved depth of around 350) & I have seen a slight increase in sync speeds.


Maybe one or two users have gone back to ADSL or have discontinued their connections.



BTOR are currently trialling Vectoring, technology to reduce the effects of crosstalk.
If/when it gets rolled out, I & other users may see some improvement in sync speeds.


« Last Edit: May 11, 2014, 12:37:41 PM by Bald_Eagle1 »
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kenny

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Re: help with stats
« Reply #4 on: May 11, 2014, 12:40:05 PM »

thanks for that save me looking at graphs etc and thinking there's a problem when there isn't.

I'm running a zyxel sbg3300 modem/router and it has vectoring built in so I should see an improvement when it gets launched.

kenny

« Last Edit: May 11, 2014, 01:00:41 PM by kenny »
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