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Stats from HG612 below, it doesn't look like G.IMP is active. Engineer coming later this week since I am only about 250m from the AIO (new estate) and theoretically should be getting 80/20 (understand of course theres an overhead) but only getting around 46. BT though it was strange that upload was pretty much full speed but not the download.
Anyone spot anything unusual in the stats below if you have a sec ?
Thanks.
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 24448 Kbps, Downstream rate = 52952 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 50219 Kbps
Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 7.1 8.5
Attn(dB): 14.6 0.0
Pwr(dBm): 13.1 6.4
VDSL2 framing
Bearer 0
MSGc: 18 26
B: 239 237
M: 1 1
T: 64 42
R: 14 16
S: 0.1521 0.3781
L: 13360 5374
D: 1 1
I: 254 127
N: 254 254
Counters
Bearer 0
OHF: 45964883 2930380
OHFErr: 1173 1634
RS: 2941726361 2426971
RSCorr: 20688 4983
RSUnCorr: 4864 0
Bearer 0
HEC: 2644 0
OCD: 93 0
LCD: 93 0
Total Cells: 2247977443 0
Data Cells: 409512190 0
Drop Cells: 0
Bit Errors: 0 0
ES: 3200 3531
SES: 11 0
UAS: 56 45
AS: 112295
Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 2.44 3.98
OR: 78.59 64.22
AgR: 50298.01 20063.54
Bitswap: 64421/64421 753/753
Regards PGre
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Additional stats.
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 24440 Kbps, Downstream rate = 52952 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 50219 Kbps
Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 24440 kbps 52952 kbps
Actual Aggregate Tx Power: 6.4 dBm 13.1 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 3.7 16.3 22.8 N/A N/A 9.7 20.9 30.6
Signal Attenuation(dB): 3.7 15.4 21.9 N/A N/A 12.4 20.7 30.5
SNR Margin(dB): 8.4 8.5 8.4 N/A N/A 7.1 7.1 7.1
TX Power(dBm): -8.8 -25.9 6.4 N/A N/A 9.8 7.8 6.9
Regards PGre
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VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 3.7 16.3 22.8 N/A N/A 9.7 20.9 30.6
Are u sure of within 250m away from the cabinet? Your stats are look like you are approx 350m away!
Mine is much closer to the cabinet approx 250m below:
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 2.6 12.8 19.2 N/A N/A 6.7 15.1 24.7
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What estimate does www.dslchecker.bt.com give for the line?
I can see it's a Huawei cab but G.INP is not on.
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Hi,
As mentioned 80/20 and yes, I can see G.INP isn't on as no Bearer info.
Regards PGre
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What firmware is on your openreach modem HG612?
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Sorry, that's not an estimate returned by the dslchecker.
I meant like this : VDSL Range A (Clean) 80 69.6 20 20 63.1 Available -- -- --
VDSL Range B (Impacted) 80 55 20 17.8 39.8 Available -- -- --
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It's based on the chap that pulled my line through and the raft of engineers I have spoken who did the AIO install, and all have said its its around 250 to 300m worst case.
At .3km BT expect around 76 less the overhead.
Just for info, I was previously getting around 28Mbps when the line was 1.3k to the old PCP, which meant it seemed to be performing better than normally expected. (normal estimates are around 23 for that distance)
Regards PGre
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Well.. 80/20 is what I suggested..
High Low High Low
VDSL Range A (Clean) 80 80 20 20 76.4
VDSL Range B (Impacted) 80 63.7 20 17.6. 39.8
Regards PGre
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My reaction is that the download speed is on the low side for that line attenuation. I get 58mbps on 21.1db attenuation. You have 53mbps on 14.6db attenuation. However, your upload speed is excellent and looks like a relatively short distance to the cabinet.
What sort of domestic wiring set-up do you have? Downstream speeds are disproportionately affected by noise introduced in home phone extensions (upstream is relatively unaffected). I always recommend if you have anything more complex than a single (master) socket that you baseline the performance you get from the master without any extensions wired in. If you have an NTE5 master, that means removing the faceplate and plugging the modem/router into the test socket and measuring the stats under those conditions. It might mean a temporary set-up, but those baseline figures tell you what could be achieved. If performance at the test socket is substantially better, then improvements can be looked at.
nb. the (temporary) disconnection of extensions is critically important as performance at the master socket can actually be worse than that at an extension if an (unfiltered) extension is still attached. In my case it loses 40% of downstream speed.
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bcm96368MVWG_fs_kernelHG612V100R001C01B030SP08
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Looks like an initial estimate that's yet to be updated by real world stats, So not much use at the moment.
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I remember my cabinet went live in 2014 as BT Wholesale estimate for my line is 80 20 but sooner after a few month, it went down to 73 20 see below:
High Low High Low
VDSL Range A (Clean) 80 73 20 20 66.9 Available -- -- -- --
VDSL Range B (Impacted) 80 57.7 20 17.8 39.8 Available -- -- -- --
Edited by adslmax (Mon 30-Jan-17 19:15:33)
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Hi,
It's a new build, to give some idea of age of wiring, its straight to the NTE5 though with no other wiring. First thing I do is check nothing else is connected.
I asked the sparky that installed it to make route as short as possible to my study and not bother with connecting the other wire anyway.
The test done on the meter socket though and through filtered faceplate.
Regards PGre
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Sounds like it wasn't installed by an Openeach engineer?
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Yes, that one.
Regards PGre
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What wasn't the Master socket ? It was by the way.
The wiring in new homes (I'm on my 8th) has never been installed by OR. They connect up outside to the internal wiring thats left by the builder.
As I am aware of how VDSL is affected by noise/distance etc every new build I have looked to minimise these issues internally.
(In one house that meant installing master socket/Modem/Router in the garage as I had hard wired the rest of the house with CAT6)
But anyway, I am guessing you can't she any more light on the issue based on the stats.
Regards PGre
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There looks like 'something' awry with it for sure .........
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When the engineer comes, get them to accurately measure the D side.
Maybe a duff DSLAM port ?
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(I'm on my 8th)
Make sure the next new estate is FTTP 
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Yeh.. hopefully engineer will find something when they attend.
I do need to ask my neighbours if they have similar issue.
(There are only 39 active lines from the AIO)
I was wondering if externally it was better to have a shorter distance to the DP but having more active lines in a 100pair cable or if it was better to have a longer run from DP to the master socket.
I think its something like an 5 or 6 pair they used from house to DP. (Guessing as I haven't checked that at this point).
Regards PGre
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Yeh.. tell me about it !
When we were looking we were hoping it would have been FTTP, we bought from plan and things hadn't been fully decided at that point. However the good news was that the developer part funded the AIO.
The sad bit is the developments all around us are all FTTP  but hey, I know there are many worse off.
I will be looking to see if baby_frogmella is successful with the FTTP OD order, if I could order with no install etc then I'll go for that.
Regards PGre
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For the past few years all UG lead ins have been 2 pair.
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Ah.. thanks.
Do you think it would be better to have the DP closer but then from DP to AIO on a large but then longer cable ?
Or not make much difference?
Not that I have much choice, but I know the DP is probably half the distance to the AIO if not more.
Just wondering how noise/cross talk would affect either option differently if at all.
Regards PGre
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My take on the two stats posts you have made.
Attenuation at 14.6 suggests somewhere around 300m - mine at 16.4dB is around 440m. The line and signal attenuations for D1, D2 and D3 look good and appropriate for the distance.my line has Signal Atten of 40.8dB and Line Atten of 40.9dB which is significantly greater than yours.
Your max attainable is similar to actual.
The SNR margin of 7.1 is a dB higher than standard but not an issue.
It does, to me, point to a VERY noisy line whether it is from cross talk, external noise, a bad/noisy power supply or something in your house causing the problem.
As you have an HG612, can you install DSL stats and then have them uploading to https://www.mydslwebstats.co.uk/ where we can see the various plots.
/
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M H C
taurus excreta cerebrum vincit
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I don't have a Windows or Linux client lying around at the moment..
What I will do is knock as much electrical items off as I can to isolate any potential noise internally, and then also try with the HH6 I have just to eliminate the HG612.
Will see what I can do tomorrow.
Thanks for the responses.
Regards PGre
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Include your central heating - pumps can be noisy, heat exchangers and heat pumps, solar panel inverters, fridge/freezers ...
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M H C
taurus excreta cerebrum vincit
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it runs on a mac under wine
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It really is not always as cut and dried as one would like.
Best case scenario would be the one that gave the pair as little proximity to other workers as possible.
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My take on the two stats posts you have made.
I concur.
Attenuation at 14.6 suggests somewhere around 300m - mine at 16.4dB is around 440m.
My previous property had attenuation of just under 17dB. It was around 375m.
When first installed (cab was 18 months old by then), attainable was around 90/25. 3 years later, it was about 78/22.
It does, to me, point to a VERY noisy line whether it is from cross talk, external noise, a bad/noisy power supply or something in your house causing the problem.
At which point, seeing the Hlog, QLN, SNR/tone and bits/tone graphs can help.
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I know my line route - almost exactly! I can walk it from the cabinet to home and it is almost the shortest feasible. Hence teh 440 - potentially the difference between your 375 and my 440 could be wire gauge!
At which point, seeing the Hlog, QLN, SNR/tone and bits/tone graphs can help.
Hence my comment about getting DSL ststs working!
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M H C
taurus excreta cerebrum vincit
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Same here .. as in I can walk the route really easily and it's shortest possible.
I'll see what I can do with the line stats though.
Regards PGre
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route walk could be straight line distance - the actual cable length will be longer to the cabinet (PCP) where FTTC next to it!
Edited by adslmax (Tue 31-Jan-17 16:23:02)
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Just for info Max. I know the route.. and you can walk it.
I watched them install the ducts/manholes and even helped the contractor who pulled the cables through.
Plus its an AIO so no separate FTTC cab.
Regards PGre
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So, my local BT OR engineer came out, he's a very nice chap and he did the normal tests.
Tested at master socket Sync around 49/20 (same at the door so eliminated internal wiring etc)
Tested at DP which is about 100m's and again pretty much the same, minimal loss between DP and home.
Tested at the AIO Sync 80/20 there.
Line (depending on which device used was between 275 and 350m) but of a variance there of course.
Interleaving was active on down but not up.
No G.IMP available apparently on the AIO.
So still left scratching heads. Both of us felt we should be getting more, new lines etc and no crosstalk issues being flagged on the tests.
No spare pairs unfortunately to test.
So will have to see if I can escalate in order to investigate more. This of course may be futile but something doesn't seem quite right. Will also be speaking to neighbours to see what speeds they actually get to see if its just me.
Apparently on remote tests there were lots of errors shown so they have capped the line on a 55/20 profile at the moment.
Hmmm...
Regards PGre
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Tested at DP which is about 100m's and again pretty much the same, minimal loss between DP and home.
Tested at the AIO Sync 80/20 there. So is this saying the problem is somewhere between the DP and the cabinet?
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Yup.. it would appear that way.
Getting anyone to look into it more though is more difficult.
Regards PGre
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If there's no spare pairs then escalating will be useless. They'll not install a new bundle of cables.
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Can't see why you will have difficulty getting it looked into as you are below the minimum estimate for Range B (impacted).
Talking to your neighbours is a good idea.
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If there's no spare pairs then escalating will be useless. They'll not install a new bundle of cables. They did for me - I have my own bundle
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I still believe it is a noise issue, attenuations look fine for distance.
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M H C
taurus excreta cerebrum vincit
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Was the cap applied after the engineer clocked 80/20 at the cabinet? Or was it existing before the visit. I find it quite confusing as to how this could be so.
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - AAISP Home::1 80/20. Sync 54999/14466Kbps @ 600m. BQMs - IPv4 & IPv6
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They applied the cap after, well during the visit.
At the moment its sat below the min figure BT said, so its being escalated hopefully.
The engineer and I were suggesting just running 300m of new cable up the road 
Regards PGre
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As I understand it - from a BT Tech, is that they can test using a specific log-on and any banding will not be applied. At the time we were investigating an odd issue where an 80/20 line was being capped at 80/10 however as soon as he used his logon it went to 80/20 then returning to the normal logon dropped it to 80/10 again!
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M H C
taurus excreta cerebrum vincit
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Ta.
So basically they are testing the wiring/connections within the AIO, or between FTTC and PCP, depending on which type it is.
Kindness isn't going to cure the world of all its awfulness but it's a good place to begin. Daisy Ridley.
My broadband basic info/help site - www.robertos.me.uk. Domains, site and mail hosting - Tsohost.
Connection - AAISP Home::1 80/20. Sync 54999/14466Kbps @ 600m. BQMs - IPv4 & IPv6
Edited by RobertoS (Wed 01-Feb-17 21:45:12)
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