New FTTC connection/BT wiring questions :: Fibre Broadband

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deleted
(deleted) Tue 08-Sep-15 14:59:37

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

This was a self-install. No checks were done - just plug and play at the cabinet by BTO engineer and I plugged in the modem supplied by Zen.

I'll do a quick test by moving the cables away from the power lines and go from there. Will get Zen involved if that doesn't help.

Here's what BT thinks I should have:

https://www.dropbox.com/s/y05ucmtlgmc3wen/Screenshot...

deleted
(deleted) Tue 08-Sep-15 15:00:55

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

Whilst not disagreeing with the others, try simply slackening the termination/wire screws slightly, then re-tightening, to ensure clean metallic joints - particularly as they appear to have been installed several/many years back.

Also, you should try the Quiet Line Test etc.

keith969
(learned) Tue 08-Sep-15 15:35:15

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

So your downstream range is withing the 'impacted' limits. The BT checker gives *exactly* the same readings as I get, although my ADSL was much better.

I suspect it's just your line length/condition and there's probably little you can do about it. I think I'm lucky to get the speed I do, living in rural Oxfordshire where even getting a mobile signal is sometimes tricky....

deleted
(deleted) Tue 08-Sep-15 17:11:03

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

A strange combination from Zen, then. If they quoted a 50Mbps speed, they are using the bottom of the A range - which would normally go with an engineer install.

Certainly worth doing a check to move cables away from the mains. If you do as the other poster suggests, and re-make the joint to be sure of shiny cable, can I suggest a subtle alteration too?

You should probably ensure the two wires of the pair stay twisted as close up to the screws as possible. Those twists help reject RF interference.

Beyond such simple things, it is probably worth calling Zen.

deleted
(deleted) Tue 08-Sep-15 17:24:50

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

Well, I would have thought it's all plug and play but.. hmm.. I've contacted Zen but the order is not yet "fulfilled" on BT system (even though I am using it), so they can't do any line tests or whatever else they need to do.

Hopefully, tomorrow the order will be completed.

I've moved the phone cable as far away as I could but no difference following the router reboot. Haven't played with the connections yet as the wife was nurturing her Internet withdrawal symptoms! I've noticed that one of the ring circuit power cables was jammed right on top of the phone extension one - hmm!

Zen did suggest that if they are not able to resolve the issue, then they could move me down to their 40/10 product.. but I want more speed! Hope they are not going to be difficult...

MHC
(sensei) Tue 08-Sep-15 18:27:02

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

You may have to accept that some lines are significantly noisier than others for various reasons and you just cannot get much faster. The range of "impacted speeds" is to show that all lines are different.

If that is the case you should think about the offer to move to a 40/10 package. I always recommend that if the impacted speeds are pointing towards a speed under 55Mbos then to consider initially going for a 40/10 package whilst making sure that provider will upgrade you to 80/20 without penalty if you can see the line has significant potential - easier to move up than down!

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C

taurus excreta cerebrum vincit

deleted
(deleted) Wed 09-Sep-15 17:49:59

Re: New FTTC connection/BT wiring questions

[re: MHC] [link to this post]

Welp, Zen were not helpful. They said it's "within the predefined limits" and will not be getting BT to look at it. Only if it was below 25mbps(!) that they would consider it... Thanks, Zen.

So, I am left to my own devices and will be installing a brand new master socket in the garage at the point of entry. Will keep you posted.

deleted
(deleted) Fri 11-Sep-15 07:49:17

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

Sadly, 42Mbit isn't enough for Zen to call out an engineer. Apparently, it would have to be below 25Mbit before they would look into anything..

Sadly, since it was first installed, the sync speed has gone from 42Mbit to 38Mbit frown

I'll be asking for a downgrade to Unlimited 1 product, so that I am not paying for extra speed I cannot use.

I've been looking at TBB speed test results around my area and none are above 40Mbit, so perhaps that really is the highest that can be achieved in my area? Also, my line attenuation of 17dB seems to suggest that I am around 700m from my cabinet and some VDSL2 calculators on the web say that at that distance, I should be getting no more than 25Mbit. It's all very confusing.

MHC
(sensei) Fri 11-Sep-15 08:55:31

Re: New FTTC connection/BT wiring questions

[re: deleted] [link to this post]

17db

My line is at 16.7dB and currently synced at 79999kbps - I have had max achievable up at 83Mbps for a short while. And line length is approx 420m.

Can you install DSL stats and host some snapshots of the graphs for the full range of tones.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

M H C

taurus excreta cerebrum vincit

deleted
(deleted) Fri 11-Sep-15 09:27:07

Re: New FTTC connection/BT wiring questions

[re: MHC] [link to this post]

That's... annoying then.

Sadly, DSLStats doesn't support TG589vn modem when in VDSL2 mode. I did login to telnet and executed some commands - not sure how helpful these are.

Text

{Administrator}=>:xdsl info expand=enabled
Physical Layer Statistics: 
  Modem state:                                   up  Up time (Days hh:mm:ss):                       0 days, 1:58:25
  xDSL Standard:                                 ITU-T G.993.2 Annex B (VDSL2)  Channel Mode:                                  Interleaved
   Number of reset:                               0
   Chipset Vendor info (G.994.1):                 Local          Remote
    Country code:                                B500           B500    ID:                                          BDCM           BDCM
    Specific:                                    0000           A48C 
  System Vendor info (showtime):                 Local          Remote    Country code:                                0F00           0000
    ID:                                          TMMB           ----    Specific:                                    3C61           0000
   Bearers generic info                           DS             US
    Payload rate [kbps]:                         38003          8170    Attenuation [dB]:                            17.4           8.5
    Margins [dB]:                                6.2            5.9    Output power [dBm]:                          11.9           -0.9
     Number of bearers:                           1
    Bearer 0                                     DS             US      INP [DMT symbols]:                         3.00           0.00
      Delay [ms]:                                8.00           0.00      Depth []:                                  743            0.00
      R:                                         12             0 
G.997.1 Statistics (Current): 
  Failures:    Line failures                                Near end
      Loss of signal (LOS):                      0      Loss of frame (LOF):                       0
      Loss of power (LPR):                       0 
  Performance monitoring:    Line PM:                                     Near end
      Error second (ES):                         13 
    Channel PM:                                  Near end       Far end      Bearer 0:
        Code Violation (CV):                     106            17        FEC:                                     89746          0
     ATM data path PM:                            Near end       Far end
      Bearer 0:        HEC violation count (HEC):               1620           N/A
 G.997.1 Statistics (last 15 minutes):
   Failures:
    Line failures                                Near end      Loss of signal (LOS):                      0
      Loss of frame (LOF):                       0      Loss of power (LPR):                       0
   Performance monitoring:
    Line PM:                                     Near end      Error second (ES):                         1
     Channel PM:                                  Near end       Far end
      Bearer 0:        Code Violation (CV):                     106            17
        FEC:                                     89746          0 
    ATM data path PM:                            Near end       Far end      Bearer 0:
        HEC violation count (HEC):               1620           N/A 
G.997.1 Statistics (last 24 hours): 
  Failures:    Line failures                                Near end
      Loss of signal (LOS):                      0      Loss of frame (LOF):                       0
      Loss of power (LPR):                       0 
  Performance monitoring:    Line PM:                                     Near end
      Error second (ES):                         13 
    Channel PM:                                  Near end       Far end      Bearer 0:
        Code Violation (CV):                     106            17        FEC:                                     89746          0
     ATM data path PM:                            Near end       Far end
      Bearer 0:        HEC violation count (HEC):               1620           N/A

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