Post your FTTC line stats & unlocking info

gab81 · 24 Jul 2013 at 10:02

Locky said:
Is all the wiring in your offerent correct, the modem is not on an extension or anything like that?

hi

this flat is rather small, there's just one main plug, where the BT engineer installed the new vdsl2 faceplate. I connect using the grey phone cable supplied, to the BTO modem. There are no extensions and i am hardwired via 100 mbit cat5 cable all the time, we don't use wi-fi.

In regards to the install all i can say is that when the engineer came up, at first he couldn't find our line at the cabinet (with his oscilloscope plugged inside the flat) and asked me to access another cupboard of our building but i didn't have the keys for it.. so then he came back again, replaced batteries on the oscilloscope (apparently it died) then went back to the cabinet, found the line, activated the phone, all up and running and SBAM perfect 39996 / 9996, 12ms for the first 4.5 days as i explained in the post earlier.. then "something happened" on Sunday 16th, down for approx 20 minutes, back with sync of 27400, engineer came the following wed (19th) checked line (down approx 5 minutes), said everything OK and shown me sync of 35000 that is what i have now. Over the past weeks speeds changed a bit, ping too and now seems settled. I am trying to understand what happened on that sunday, i doubt they were activating another user so cross-talk since it was sunday....

I have been reading some other posts here on this thread (great resource btw) and i see people with SNRs which are beyond the target 6db and with WORSE attenuation than mine which sync higher so is very interesting.

Some people have said that after a line fault with DLM poking in, it can take up to 6 weeks to go back. Myth or real?

6 weeks for me will be Wed 31th July.

Gab

gab81 · 24 Jul 2013 at 11:13

I have enabled the stats graphs BTW but how can you do it if you want to turn off the PC?

gab81 · 26 Jul 2013 at 12:01

UPDATE...

I was checking stats and as of today, just 30 minutes ago, i had a new IP and my ping went down to 5ms to google.com or bbc, pretty amazing!

Quite interestingly, exactly 3 weeks ago, again on a friday, ping went from 20ms to 13ms so i guess friday is the "reset" day or something.

Other stats, such as SNR and sync speed still the same (35000 / 9996)... any clues on what's going on, the DLM gnome?

thanks
Gab

Locky · 26 Jul 2013 at 12:04

DLM has put you back on fast path.

gab81 · 26 Jul 2013 at 12:34

Locky said:
DLM has put you back on fast path.

Ok and thats great never had it so low but i cannot explain why attainable line rate is still just around 46804 down and 11000 up with sync 35000 / 9996 with the stats i have and so near fibre cab.

Up is at the max but down should go back to 39996 no? I read other peoples stats on the forum with same snr as mine (8.5-8.6) even with bit more attenuation that have like 80-100k attn rate and full sync.

Is Dlm slowly going off totally in your opinion? Other 3 weeks to wait before the final speed bump? Any tricks i can do?

Thanks!

Enigma123 · 26 Jul 2013 at 13:15

Im having problems achiving more too i can only ever achive 45000kbps out of the 52000kbps that i get can anyone work out from my stats why this is not going to the sync speed? Thanks in advance.

Modem stats

xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 8257 Kbps, Downstream rate = 52564 Kbps
Path: 0, Upstream rate = 8233 Kbps, Downstream rate = 44769 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.3 5.9
Attn(dB): 0.0 0.0
Pwr(dBm): 11.0 0.3
VDSL2 framing
Path 0
B: 51 239
M: 1 1
T: 64 42
R: 12 0
S: 0.0370 0.9262
L: 13854 2073
D: 877 1
I: 64 120
N: 64 240
Counters
Path 0
OHF: 146891731 1363494
OHFErr: 12493 780
RS: 3244437978 2884617
RSCorr: 29418012 0
RSUnCorr: 974509 0

Path 0
HEC: 214977 0
OCD: 7642 0
LCD: 7642 0
Total Cells: 4252330138 0
Data Cells: 504681814 0
Drop Cells: 0
Bit Errors: 0 0

ES: 2065 687
SES: 8 4
UAS: 20 20
AS: 348801

Path 0
INP: 3.00 0.00
PER: 2.36 9.72
delay: 8.00 0.00
OR: 81.17 26.32

Bitswap: 152302 13881

gab81 · 26 Jul 2013 at 16:05

Interesting, what package you have? 80/20? Did you ever experience loss of connection with interruption of internet service? That's what happened to me and that triggered DLM at the beginning.....now has been improving since 16th June although it's not as fast as it was before. In the end the line goes very well here and i'm just 5mbit down to the theoretical max that i am paying for. Just today I got a new IP and ping is awesome, let's see if it stays that way...

Gab

Enigma123 · 26 Jul 2013 at 16:48

I'm on 80/20 yeah when i first got it their where nothing but problems this was a year ago and an openreach engineer came out and phoned up who ever they phone up about DLM and told them to set it at 45Mbps. So i've been bashing my head talking to BT india (IT HURTS) telling them i think my line is capped but they won't listen so i'm moving ISP hopefully when the line is retrained it releases the cap if this is a cap?

gab81 · 26 Jul 2013 at 16:54

Enigma123 said:
I'm on 80/20 yeah when i first got it their where nothing but problems this was a year ago and an openreach engineer came out and phoned up who ever they phone up about DLM and told them to set it at 45Mbps. So i've been bashing my head talking to BT india (IT HURTS) telling them i think my line is capped but they won't listen so i'm moving ISP hopefully when the line is retrained it releases the cap if this is a cap?

hmhm i see, well personally i'm with Sky and i like they have better customer service than BT IMO which i had a few years ago. And they don't have the stupid rule that if you DONT use the phone, they charge you an XX of money, which is nonsense! Though Fibre is still in the hands of OpenReach.

Enigma123 · 26 Jul 2013 at 17:50

Yes i am moving all my services from BT their tech help or any other help is a shambles if it isnt written in a script.

Oh Ed not again. · 8 Aug 2013 at 13:10

Following on from my saga, I got hold of an unlocked modem and ran some stats. For the tl;dr mob (and I don't blame you) here's what got me to this point:

- Speed dropped from 46 to 29mb down, 16 to 11mb up.
- Called BT, engineer eventually dispatched. Ended up recabling everything from the external socket back to the modem. Also replaced modem. Eventually found fault in the 15-20ft cable run from the ground box to my front door, fault is manifesting itself in a voltage drop form 68v at the ground box to 51v at my front door. 55v is the preferred BT tolerance, 50v is a fail. Nuts.
- Spoke to BT again yesterday, they said there's no chance they'll replace the cable as the service is stable but offered me an out on my contract because they can't offer anywhere near the speeds I was promised. Handy, but pointless as FTTC is the fastest I can get here anyway.

However... On running line diags via the unlocked modem I noted that my CRC errors in the Huawei web GUI were pretty high for a 20 minute connection:

So I borrowed a friend's unlocked modem, just to see what the line values were for myself... Any thoughts/ideas? Or is what I'm seeing completely within tolerances?

Cheers in advance.

Code:

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:    0
Max:    Upstream rate = 15112 Kbps, Downstream rate = 35524 Kbps
Path:    0, Upstream rate = 12706 Kbps, Downstream rate = 31489 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783) 
DS: (32,859) (1216,1963) (2792,3971) 
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783) 
DS: (32,859) (1216,1963) (2792,3971) 
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      15112 kbps         35524 kbps
Actual Aggregate Tx Power:        7.4 dBm          13.8 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB):     4.6     25.1     39.1      N/A     12.4     31.7     50.1    
Signal Attenuation(dB):     4.6     24.0     38.2      N/A     12.4     31.7     50.1    
        SNR Margin(dB):     5.9     6.0     5.9      N/A     6.0     6.1     6.0    
         TX Power(dBm):     0.6    -18.4     6.4      N/A     11.3     7.7     6.9    
#

Code:

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:    0
Max:    Upstream rate = 15108 Kbps, Downstream rate = 35524 Kbps
Path:    0, Upstream rate = 12706 Kbps, Downstream rate = 31489 Kbps

Link Power State:    L0
Mode:            VDSL2 Annex B
VDSL2 Profile:        Profile 17a
TPS-TC:            PTM Mode
Trellis:        U:ON /D:ON
Line Status:        No Defect
Training Status:    Showtime
        Down        Up
SNR (dB):     6.0         6.0
Attn(dB):     0.0         0.0
Pwr(dBm):     13.8         7.4
            VDSL2 framing
            Path 0
B:        63        47
M:        1        1
T:        64        64
R:        16        16
S:        0.0647        0.1201
L:        9898        4263
D:        499        267
I:        80        64
N:        80        64
            Counters
            Path 0
OHF:        667566        270338
OHFErr:        1688        0
RS:        128172404        458592
RSCorr:        22487        1436
RSUnCorr:    325119        0

            Path 0
HEC:        205        0
OCD:        0        0
LCD:        0        0
Total Cells:    125507891        0
Data Cells:    4798549        0
Drop Cells:    0
Bit Errors:    0        0

ES:        8        0
SES:        5        0
UAS:        19        19
AS:        2078

            Path 0
INP:        3.00        4.00
PER:        3.10        7.68
delay:        8.00        8.00
OR:        61.86        33.30

Bitswap:    389        290

Line rate (kbit/s)31489 12706
CRC errors325119 0
FEC errors1688 2
HEC errors205 0

Enigma123 · 8 Aug 2013 at 14:59

Randal i would have gone with a different ISP to see if they could ratchet up the pressure on openreach to do it.

Oh Ed not again. · 8 Aug 2013 at 15:31

Dunno what is more hassle tbh, I could go through all that and get tied I to another contra t to be no better off. The Mrs and I are discussing moving next year, so I might just suck it up unless things deteriorate further so I have something more to go on. Which is what I'm looking for!

cjd78 · 10 Aug 2013 at 19:19

Hi Guys,

Just back reporting on our rural broadband project (see a few pages back).

We are now live with 15 customers and are getting a real world view of the situation.
Just a recap, we live on a new(ish) estate built between 2001 and 2008 in various phases by two developers.
All cabling is 0.5mm copper underground from the PCP / DSLAM.
There is around 300 dwellings and the D side lines leave the DSLAM / PCP on 8 x 100pair cables (obviously plenty of spare pairs!). This has had (hopefully) an advantage on spreading customers out a little amongst the multicore cables and reducing the effects of crosstalk.
Our observation (in comparing to the BT FTTC hardware) is that we are achieving much better downstream rates over longer distances. I think this is because we have tweaked settings on our DSLAM to bias more toward sacrificing a little upstream for more downstream.
The performance has exceeded our expectations - this may even be due to us using totally different hardware than BT. Our DSLAM is a Zyxel and the modems are all Zyxel VMG1312-B10A... ???

Here is my line stats from home... (Bear in mind this is a 1170m line!!!)

============================================================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile 17a
Traffic Type: PTM Mode
Link Uptime: 0 day: 0 hour: 33 minutes
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 7.112 Mbps 48.355 Mbps
Actual Net Data Rate: 7.086 Mbps 48.283 Mbps
Trellis Coding: ON ON
SNR Margin: 4.9 dB 5.3 dB
Actual Delay: 0 ms 0 ms
Transmit Power: 3.7 dBm 14.5 dBm
Receive Power: -16.4 dBm -6.9 dBm
Actual INP: 0.0 symbols 0.0 symbols
Total Attenuation: 20.2 dB 21.4 dB
Attainable Net Data Rate: 7.098 Mbps 48.512 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 8.9 46.5 N/A N/A 20.4 56.0 84.6
Signal Attenuation(dB): 8.9 46.0 N/A N/A 20.4 56.0 N/A
SNR Margin(dB): 4.7 4.9 N/A N/A 5.4 5.2 N/A
Transmit Power(dBm):- 7.6 3.4 N/A N/A 13.4 7.9 N/A
============================================================================

More to come....

cjd78 · 10 Aug 2013 at 19:46

Here is the stats for the first 15 lines on park...
We have lines between 700m and 1200m - all running on profile 17a.
We have capped people for now at 50Meg although realistically at these distances only a couple of these people could exceed that.
We have managed to get a 700m line on 75Meg Down / 17Meg Up but put it back to 50 for now...
A few nice suprises we've had...

1100m line synced reliably at 50Meg Down / 7Meg Up
1170m line synced reliably at 48Meg Down / 6.8Meg Up..

COmments welcome!

Westyfield2 · 10 Aug 2013 at 22:54

Top marks for getting all that setup and working!

Enigma123 · 16 Aug 2013 at 20:07

Oh i wish i could get some of those figures cjd78. I have just switched ISP and dam has my speed taken a hit

hopefully after the 72 hour training period hopefully it will be as was or faster. Can anyone gather any info about these stats?

xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 8166 Kbps, Downstream rate = 47368 Kbps
Path: 0, Upstream rate = 8229 Kbps, Downstream rate = 39973 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 8166 kbps 47368 kbps
Actual Aggregate Tx Power: 0.3 dBm 11.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 7.3 37.7 58.3 N/A 17.7 46.6 72.7
Signal Attenuation(dB): 7.3 36.9 52.5 N/A 17.7 46.6 N/A
SNR Margin(dB): 5.9 5.9 5.9 N/A 9.5 9.6 N/A
TX Power(dBm): -4.1 -5.3 -3.8 N/A 8.3 7.7 N/A

Audigex · 17 Aug 2013 at 02:05

Just upgraded to Fibre with Sky. I can see the BT Fibre Cabinet from the end of my hall so my line is capable of more than the 40/10Mbps I'm paying for. Actual throughput below:

Apparently I could get slightly better by tweaking, but 37.89Mbps down and 8.32Mbps up is probably enough not to bother... I was only getting 7Mbps down 0.6Mbps up on ASDL, so I'm more than happy.

Still not quite as good as my 98Mbps down, 96Mbps I had at uni though

Enigma123 · 20 Aug 2013 at 09:34

I'm Back with new stats, And with the stats i have been proven right Openreach put a hard DLM on my line so i couldn't get more than 45000Kbps i told BT this but they didn't listen as BT Wholesale lowered my speed estimate this year to 33.3Mbps and my new ISP thought it was good to put me on a 40/10 package despite me paying for 80/20 package.

Well i had to open up on them for that. The excuse was the estimate says you can only get 33.3Mbps after telling them the estimate is only a figure so the customer can decide if he or she wants the product, if i pay for upto 76Mbps i want as much as what the line will take. How many people have ISP's done this to glad i can get my stats anyway here they are my connection is only 24hours old since being moved to the 80/20 package that i should have been on before the one i pay for! Speeds still seem to be rising.

xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 8404 Kbps, Downstream rate = 50316 Kbps
Path: 0, Upstream rate = 8501 Kbps, Downstream rate = 49011 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3959)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 8404 kbps 50316 kbps
Actual Aggregate Tx Power: 1.2 dBm 11.0 dBm

Oh Ed not again. · 2 Sep 2013 at 17:35

edit - From reading your post Enigma... this looks similar...

Following on from this post...

Can I expect my speeds to increase given these values?

Code:

 xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:    2
Max:    Upstream rate = 20738 Kbps, Downstream rate = 69472 Kbps
Path:    0, Upstream rate = 14999 Kbps, Downstream rate = 35000 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783) 
DS: (32,859) (1216,1963) (2792,3971) 
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783) 
DS: (32,859) (1216,1963) (2792,3971) 
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      20738 kbps         69472 kbps
Actual Aggregate Tx Power:        7.4 dBm          13.3 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB):     4.6     24.6     37.5      N/A     12.4     30.8     47.5    
Signal Attenuation(dB):     4.6     23.7     36.6      N/A     12.4     30.8     47.5    
        SNR Margin(dB):     10.1     10.1     10.1      N/A     17.2     17.2     17.2    
         TX Power(dBm):     0.3    -18.7     6.3      N/A     11.1     7.8     3.9

Code:

dslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:    2
Max:    Upstream rate = 20711 Kbps, Downstream rate = 69472 Kbps
Path:    0, Upstream rate = 14999 Kbps, Downstream rate = 35000 Kbps

Link Power State:    L0
Mode:            VDSL2 Annex B
VDSL2 Profile:        Profile 17a
TPS-TC:            PTM Mode
Trellis:        U:ON /D:ON
Line Status:        No Defect
Training Status:    Showtime
        Down        Up
SNR (dB):     17.2         10.1
Attn(dB):     0.0         0.0
Pwr(dBm):     13.3         7.4
            VDSL2 framing
            Path 0
B:        239        237
M:        1        1
T:        64        35
R:        0        16
S:        0.2182        0.5038
L:        8799        4033
D:        1        1
I:        240        127
N:        240        254
            Counters
            Path 0
OHF:        1043383        829969
OHFErr:        4        0
RS:        0        3259898
RSCorr:        0        5
RSUnCorr:    0        0

            Path 0
HEC:        2        0
OCD:        0        0
LCD:        0        0
Total Cells:    245917901        0
Data Cells:    4536197        0
Drop Cells:    0
Bit Errors:    0        0

ES:        475        879
SES:        59        0
UAS:        6635        6635
AS:        3658

            Path 0
INP:        0.00        0.00
PER:        3.49        4.40
delay:        0.00        0.00
OR:        59.57        58.06

Bitswap:    2        2