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My Connection

elfish
Grafter
Posts: 235
Registered: 22-02-2009

My Connection

Hi all,
Just thought that I would share my stats and hopefully get some feedback/comments from the community.
Running a NETGEAR DG834PN, connected to the BT master socket using a adslnation XF-1e microfilter, only other device connected to the phone line is a phone, connected to the microfilter as well.
I have been experimenting with the SNRM, and have come to the conclusion that when set to 70% using DMT, it provides me with the least amount of errors, but gives me the best speed.
I am just waiting for interleaving to be disabled, just to test that out, as my minimal latency time is 32ms to anywhere, even to the plusnet aggregator router.
Due to the fact that I am awaiting interleaving to be disabled, I have been resync'ing my CPE in the mornings just to check as to whether it has been done. I asked plusnet to turn it off, in which they replied that it had been, but after 5 days, no change. Got back to them and they said that it had been set to auto, so basically it turned back on again, so this time they have said that I will be switched to 'OFF', so hopefully by the end of this week.
But from doing the resync's (at 70% slider value), I was sync'ing at 7392 with the SNRM never falling below 6dB even in the evening's, but now it sync'ing at 7360.
7392 is the sweet spot, as it was allowing the IP profile to hit 6500, but obviously with it sync'ing at 7360, its down to 6000.  Anything higher than 7392, error rate goes up.
Another thing that I am trying to figure out, is to why a tone is only being loaded with 2 bits, this varies when resync'ing, so it may be tone 114 or tone 109 (see attachment), even if the noise margin slider is set to say 50%, but the SNR for that tone is good (And yes, I am not referring to the pilot tone  Wink).
18 REPLIES
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

Managed to sync back at 7392. But interleaving is still active, its been a week since I was told that it would be turned off (within 72 hours).  Undecided
Plusnet Staff
Plusnet Staff
Posts: 1,834
Thanks: 3
Registered: 24-07-2014

Re: My Connection

I note you are on 20CN which might explain why interleaving isn't off (I have another 20CN case in which I've having a devil of a job switching off interleaving). I've raised a ticket on your account to chase it for you.
 Tony
 Plusnet Support
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

Thank you Tony.
I did read another thread that someone else was waiting for interleaving to be turned off too, on 20CN.
dick:quote
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

Fastpath is now active!
Thanks.
Plusnet Staff
Plusnet Staff
Posts: 1,834
Thanks: 3
Registered: 24-07-2014

Re: My Connection

Brilliant, I'm glad it's worked. Thanks for letting us know.
 Tony
 Plusnet Support
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

I have just performed a BTw speed test, and it says that my IP Profile is 6.5Mbps. How long does it take for the IP Profile to change for my account? PlusNet is still showing an IP Profile of 6Mbps.
Thanks.
Plusnet Staff
Plusnet Staff
Posts: 17,641
Thanks: 535
Fixes: 159
Registered: 05-04-2007

Re: My Connection

It should change on our side within a few hours. However I'll go nudge it manually now.
If this post resolved your issue please click the 'This fixed my problem' button
 Chris Parr
 Plusnet Staff
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

That's a bingo.
Thanks Chris.
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

Well, Interleaving has decided to be applied again. These past few days the weather has been quiet bad, and the SNRM has been dropping below 4 down to 3 in some cases, with massive amounts of errors. The lower latency was a tad beneficial when gaming, but having large amounts of errors, was just too much, so I think I will just leave it on, as I am happy with an IP Profile of 6.5Mbps and having a reliable connection.
I am just waiting to obtain a new CPE and go FTTC, so I will leave it be until then!
Superuser
Superuser
Posts: 10,388
Thanks: 1,895
Fixes: 19
Registered: 22-08-2007

Re: My Connection

Hi,
You might find that the issue is related to REiN - running RouterStats might be informative - see links below.
If the issues are related to the d-side of your circuit, they might also impact a FTTC service too.
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

I have just installed a SSFP mk3 and am now using a high quality RJ-11 to RJ-11 cable, and wow, its made a difference (compare it with my first stats in the first post). Even previously after re-syncing, I would never get what I have got using the new SSFP.
That bump in error rate and LOS was just me unplugging and installing the SSFP.
Downstream ATT down by 2dB and Upstream ATT down by 0.5dB (from my most recent previous testing).
Downstream SNRM has gone up by 1dB and given a higher sync speed. So it looks like IP Profile 7Mbps is a go.
Superuser
Superuser
Posts: 10,388
Thanks: 1,895
Fixes: 19
Registered: 22-08-2007

Re: My Connection

Something still looks odd here.
Is this a 20CN service?  Tone utilisation looks good, but the plot is cut off before tone 255.
28dB ought to deliver 8128kbps.  The SNRM is still elevated.  Can you please post stats direct from your router?
elfish
Grafter
Posts: 235
Registered: 22-02-2009

Re: My Connection

Yes I am on 20CN service.
Bit Allocation:
adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 1
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 8064 Kbps
Tone number      Bit Allocation
  0            0
  1            0
  2            0
  3            0
  4            0
  5            0
  6            0
  7            0
  8            2
  9            3
  10           5
  11           6
  12           6
  13           7
  14           7
  15           8
  16           8
  17           8
  18           8
  19           8
  20           8
  21           7
  22           7
  23           7
  24           7
  25           6
  26           6
  27           5
  28           5
  29           4
  30           4
  31           2
  32           0
  33           0
  34           0
  35           0
  36           0
  37           7
  38           8
  39           8
  40           8
  41           9
  42           9
  43           9
  44           10
  45           11
  46           11
  47           10
  48           11
  49           11
  50           11
  51           11
  52           11
  53           12
  54           12
  55           11
  56           12
  57           11
  58           12
  59           12
  60           11
  61           12
  62           12
  63           12
  64           0
  65           12
  66           12
  67           12
  68           11
  69           12
  70           12
  71           12
  72           11
  73           12
  74           12
  75           11
  76           12
  77           12
  78           11
  79           12
  80           11
  81           12
  82           11
  83           12
  84           11
  85           11
  86           11
  87           12
  88           11
  89           11
  90           12
  91           11
  92           11
  93           12
  94           11
  95           11
  96           11
  97           11
  98           11
  99           12
  100          11
  101          11
  102          11
  103          11
  104          11
  105          11
  106          2
  107          11
  108          12
  109          11
  110          11
  111          11
  112          11
  113          11
  114          11
  115          11
  116          11
  117          11
  118          11
  119          11
  120          11
  121          11
  122          11
  123          11
  124          10
  125          11
  126          10
  127          11
  128          11
  129          10
  130          10
  131          11
  132          11
  133          10
  134          10
  135          11
  136          10
  137          10
  138          11
  139          10
  140          11
  141          10
  142          10
  143          10
  144          11
  145          10
  146          10
  147          10
  148          11
  149          10
  150          10
  151          10
  152          10
  153          10
  154          10
  155          10
  156          11
  157          10
  158          10
  159          10
  160          9
  161          10
  162          10
  163          10
  164          10
  165          10
  166          10
  167          10
  168          10
  169          10
  170          10
  171          10
  172          10
  173          10
  174          9
  175          10
  176          10
  177          9
  178          10
  179          10
  180          9
  181          10
  182          10
  183          10
  184          9
  185          10
  186          9
  187          10
  188          8
  189          8
  190          9
  191          9
  192          8
  193          9
  194          8
  195          9
  196          8
  197          8
  198          9
  199          8
  200          8
  201          9
  202          8
  203          8
  204          9
  205          8
  206          8
  207          9
  208          8
  209          8
  210          9
  211          8
  212          9
  213          8
  214          9
  215          8
  216          9
  217          8
  218          9
  219          9
  220          8
  221          9
  222          9
  223          8
  224          9
  225          8
  226          9
  227          8
  228          9
  229          8
  230          9
  231          8
  232          9
  233          8
  234          9
  235          8
  236          8
  237          9
  238          9
  239          8
  240          9
  241          8
  242          8
  243          9
  244          9
  245          8
  246          9
  247          8
  248          9
  249          8
  250          8
  251          8
  252          8
  253          8
  254          9
  255          0
#
#
SNR per tone:
adsl: ADSL driver and PHY status
Status: ShowtimeRetrain Reason: 1
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 8064 Kbps
Tone number      SNR
  0            0.0000
  1            0.0000
  2            0.0000
  3            0.0000
  4            0.0000
  5            0.0000
  6            0.0000
  7            0.0000
  8            0.0000
  9            0.0000
  10           0.0000
  11           0.0000
  12           0.0000
  13           0.0000
  14           0.0000
  15           0.0000
  16           0.0000
  17           0.0000
  18           0.0000
  19           0.0000
  20           0.0000
  21           0.0000
  22           0.0000
  23           0.0000
  24           0.0000
  25           0.0000
  26           0.0000
  27           0.0000
  28           0.0000
  29           0.0000
  30           0.0000
  31           0.0000
  32           0.0000
  33           1.3125
  34           0.8750
  35           0.6875
  36           0.5625
  37           28.1250
  38           29.8750
  39           31.2500
  40           31.8125
  41           33.1250
  42           34.4375
  43           35.8750
  44           37.5000
  45           39.0625
  46           40.3750
  47           40.5000
  48           40.7500
  49           41.0000
  50           41.5625
  51           42.0000
  52           42.7500
  53           43.2500
  54           43.8125
  55           44.0000
  56           43.6250
  57           43.5625
  58           43.7500
  59           43.8125
  60           44.0625
  61           44.1875
  62           44.1250
  63           44.8750
  64           46.8750
  65           44.9375
  66           44.2500
  67           43.8750
  68           43.8750
  69           44.0625
  70           44.0000
  71           44.0625
  72           44.0000
  73           44.0000
  74           44.0625
  75           43.7500
  76           43.7500
  77           43.8750
  78           43.8750
  79           43.6875
  80           43.1875
  81           42.8750
  82           43.1875
  83           43.1250
  84           42.3750
  85           42.5625
  86           42.8750
  87           42.6250
  88           42.7500
  89           42.5000
  90           42.6875
  91           42.8125
  92           42.8750
  93           42.8125
  94           42.6875
  95           42.0625
  96           42.5625
  97           42.3750
  98           42.0625
  99           42.1250
  100          41.8125
  101          41.7500
  102          41.6250
  103          41.8125
  104          41.8125
  105          42.5625
  106          42.6875
  107          42.5000
  108          42.3750
  109          41.8125
  110          42.3750
  111          41.7500
  112          42.1250
  113          42.1875
  114          41.8125
  115          41.3750
  116          41.3125
  117          41.7500
  118          41.5000
  119          41.6250
  120          41.6250
  121          41.1875
  122          41.1250
  123          40.8125
  124          40.6250
  125          40.7500
  126          40.3125
  127          40.6875
  128          40.1875
  129          39.7500
  130          40.0000
  131          40.4375
  132          40.3125
  133          40.6875
  134          39.5625
  135          39.4375
  136          39.3750
  137          40.5625
  138          40.5625
  139          40.3750
  140          40.3750
  141          39.5000
  142          39.0625
  143          39.5625
  144          39.5000
  145          39.5000
  146          39.0625
  147          39.5625
  148          39.5000
  149          38.7500
  150          39.0000
  151          39.4375
  152          39.0000
  153          38.8125
  154          38.9375
  155          38.8750
  156          39.0000
  157          38.8125
  158          38.5625
  159          38.3125
  160          38.3125
  161          39.0625
  162          39.2500
  163          39.0000
  164          38.5625
  165          38.2500
  166          38.5625
  167          38.0625
  168          38.3125
  169          38.1875
  170          38.5000
  171          38.0000
  172          37.8125
  173          38.0000
  174          38.0000
  175          38.1875
  176          38.1250
  177          37.7500
  178          37.6875
  179          37.5625
  180          37.8125
  181          38.2500
  182          37.7500
  183          38.0625
  184          37.7500
  185          37.8125
  186          37.8750
  187          37.1250
  188          37.8125
  189          37.0625
  190          37.6250
  191          37.6875
  192          37.3125
  193          37.0000
  194          37.1250
  195          37.3750
  196          37.5000
  197          36.8125
  198          36.7500
  199          36.6250
  200          36.5000
  201          36.5000
  202          36.5625
  203          36.5000
  204          36.8750
  205          36.8125
  206          37.3125
  207          37.0000
  208          36.8750
  209          36.8125
  210          36.8125
  211          36.6250
  212          37.3750
  213          37.6250
  214          37.3125
  215          37.6875
  216          37.2500
  217          37.4375
  218          37.8125
  219          38.3750
  220          37.6250
  221          37.5625
  222          37.6875
  223          37.2500
  224          37.1875
  225          37.4375
  226          37.5000
  227          37.5625
  228          37.1875
  229          37.3125
  230          37.2500
  231          36.8750
  232          37.1250
  233          37.1875
  234          37.1875
  235          37.4375
  236          37.0000
  237          37.1250
  238          37.5625
  239          37.3125
  240          37.1875
  241          37.2500
  242          37.0625
  243          38.5625
  244          37.7500
  245          36.6875
  246          37.1250
  247          36.6875
  248          36.8750
  249          36.2500
  250          36.2500
  251          36.0625
  252          36.6875
  253          36.0000
  254          36.3750
  255          0.0000
#
#
The path has interleaving enabled, so I assume 8128 sync rate isn't always possible.
The SNRM has not moved a single figure since I installed the SSFP and new cable yesterday. Even yesterday evening, there was no change from 8.1dB.
Error rate has been very low, just a couple here and there, plus no disruptions.
I could probably push (lower the SNRM to around 6dB) to get a bit more out of the connection, but I don't want to risk error rates increasing when bad weather returns.
Superuser
Superuser
Posts: 10,388
Thanks: 1,895
Fixes: 19
Registered: 22-08-2007

Re: My Connection

Right, now you have confirmed 20CN, everything becomes clearer.  You are correct, with interleaving on, it is going to sink a bit of synch speed.  Given the apparent quality of the line, you most likely do not need interleaving to be on.  PlusNet ought (on request) to be able to remove it.
As this line is working at its max synch, "spare" SNRM headroom is understandable, trying to adjust it (downwards) is not going to deliver anything.  This line looks like is it as good as it gets!