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Author Topic: Cabinet 25 DSLAM Installation  (Read 9019 times)

burakkucat

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Re: Cabinet 25 DSLAM Installation
« Reply #105 on: May 23, 2019, 01:55:39 AM »

Having noticed the time (and I can hear my bed calling), I just did a quick visual comparison of the plots. Nothing really stands out . . . so I suspect that you have been hit by a nasty dose of cross-talk.
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mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #106 on: May 23, 2019, 02:36:07 PM »

Oh no! I was hoping that the target SNR was being intentionally reduced as I believe that the target is now 3 on stabilised lines (as opposed to 6). Also, it happened  bag on 11am (to the second) yesterday suggesting it was an intentional action as opposed to just random crosstalk over time.
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j0hn

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Re: Cabinet 25 DSLAM Installation
« Reply #107 on: May 23, 2019, 05:04:05 PM »

The fact it occurred bang on 11am means the new crosstalker went live at that exact time.

The target SNRM being reduced would increase the attainable rate.
The target can only be lowered on lines with G.INP active.

It's the current SNRM that has reduced (not the target) which suggests additional noise has lowered the line from the 6dB target.

Sounds like crosstalk to me.
Sadly from a crosstalk point of view and with it being a newly activated cabinet it is likely to only get worse as more take up the service.
« Last Edit: May 23, 2019, 05:06:27 PM by j0hn »
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retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #108 on: May 23, 2019, 05:07:20 PM »

The fact it occurred bang on 11am means the new crosstalker went live at that exact time.

The target SNRM being reduced would increase the attainable rate.
The target can only be lowered on lines with G.INP active.

Sounds like crosstalk to me.
Sadly from a crosstalk point of view and with it being a newly activated cabinet it is likely to only get worse as more take up the service.

Thanks John. Letís hope that G.INP is applied sooner rather than later then, think I will be patient and wait until end of June and if itís still not active Iíll query with Openreach. Iím worried in their haste in configuring the DSLAM they havenít configured it to use g.INP!
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Ronski

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Re: Cabinet 25 DSLAM Installation
« Reply #109 on: May 23, 2019, 07:54:29 PM »

Shame you didn't get them to install it with vectoring  :no: (presuming of course they allowed that option)
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mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #110 on: May 23, 2019, 09:24:54 PM »

Shame you didn't get them to install it with vectoring  :no: (presuming of course they allowed that option)

Donít think so, or if I had asked no one would have understood what I was talking about. Interleaving is applied though from what I can tell, which from what I have read would be normal on a new line for the first few weeks.
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j0hn

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Re: Cabinet 25 DSLAM Installation
« Reply #111 on: May 23, 2019, 11:56:18 PM »

I'd say over 90% of the time G.INP is applied after 48 hours.
For others it can be a few weeks.
For my line it took 11 weeks to apply G.INP.

A very very small amount of lines seem to get overlooked completely.
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Chrysalis

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Re: Cabinet 25 DSLAM Installation
« Reply #112 on: May 24, 2019, 01:42:25 AM »

The good news is that usually its early crosstalkers that have the biggest impact, its not a hard fast rule, but in tests that were done prior to VDSL been a commercial product by BT and other telcos most of the time they found the first crosstalker had a massive impact but then others had smaller levels of impact.  Because the existing crosstalk kind of smothers new crosstalk.

My first crosstalker knocked off about 20mbit (110 down to 90 attainable), the second about another 10, then I had more after that but were on individual levels much smaller.  Not every activation will be a crosstalker, if they on a different cable bundle or on the far side of your cable bundle they probably wont impact your line.
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Ronski

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Re: Cabinet 25 DSLAM Installation
« Reply #113 on: May 24, 2019, 06:17:42 AM »

Vectoring is noise cancellation, it effectively cancels out cross talk.

https://www.edpnet.be/en/support/installation-and-usage/internet/learn-about-dsl-configuration/what-is-vectoring-technology.html

It is currently rolled out on a very select few BDUK cabinets to reach targets.
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mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #114 on: May 24, 2019, 07:07:01 PM »

Thank you to everyone who has contributed to this thread over the past few months - your help and advice has been invaluable and I hope too that other forum members have or will be interested in the "journey" I have been on.  I'm disappointed that after 11 days there is no sign of G.INP, but I am also conscious that I am asking questions of you that have been discussed in other threads.  I have called both Sky & Openreach - Sky say they can no longer request DLM resets or similar, and Openreach say that this is an SP matter. 

I've spent several hours today reading large threads on the forum as people post their line stats, attempt to set their sync speeds and poke DLM into behaving a certain way.  After all this reading, I have come to the conclusion that the best thing to do is to leave everything alone, and put trust in the system. I will be back in touch on 1 July, and by this time I hope to have some positive news to share - HG612 Modem Stats is running 24/7!

Thank you once again everyone.  And one final dump of my line stats:

Code: [Select]
xdslcmd info --stats

xdslcmd: ADSL driver and PHY status

Status: Showtime

Retrain Reason: 0

Last initialization procedure status: 0

Max: Upstream rate = 23136 Kbps, Downstream rate = 64228 Kbps

Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 64294 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): 3.6 12.4

Attn(dB): 16.4 0.0

Pwr(dBm): 12.4 6.8

VDSL2 framing

Bearer 0

MSGc: 18 26

B: 51 237

M: 1 1

T: 64 42

R: 12 16

S: 0.0257 0.3781

L: 19896 5374

D: 1259 1

I: 64 127

N: 64 254

Counters

Bearer 0

OHF: 169696012 3059304

OHFErr: 22 730

RS: 492352733 121844

RSCorr: 2375406 2837

RSUnCorr: 244 0



Bearer 0

HEC: 36 0

OCD: 1 0

LCD: 1 0

Total Cells: 326903516 0

Data Cells: 2078748631 0

Drop Cells: 0

Bit Errors: 0 0



ES: 6 612

SES: 0 0

UAS: 27 27

AS: 280577



Bearer 0

INP: 3.00 0.00

INPRein: 0.00 0.00

delay: 8 0

PER: 1.65 3.98

OR: 116.12 64.22

AgR: 64410.39 20063.54



Bitswap: 200848/200851 650/653



Total time = 1 days 5 hours 56 min 44 sec

FEC: 2375406 2837

CRC: 22 730

ES: 6 612

SES: 0 0

UAS: 27 27

LOS: 0 0

LOF: 0 0

LOM: 0 0

Latest 15 minutes time = 11 min 44 sec

FEC: 2773 0

CRC: 0 0

ES: 0 0

SES: 0 0

UAS: 0 0

LOS: 0 0

LOF: 0 0

LOM: 0 0

Previous 15 minutes time = 15 min 0 sec

FEC: 4811 111

CRC: 0 130

ES: 0 57

SES: 0 0

UAS: 0 0

LOS: 0 0

LOF: 0 0

LOM: 0 0

Latest 1 day time = 5 hours 56 min 44 sec

FEC: 114899 248

CRC: 0 179

ES: 0 101

SES: 0 0

UAS: 0 0

LOS: 0 0

LOF: 0 0

LOM: 0 0

Previous 1 day time = 24 hours 0 sec

FEC: 1127893 558

CRC: 2 196

ES: 1 176

SES: 0 0

UAS: 0 0

LOS: 0 0

LOF: 0 0

LOM: 0 0

Since Link time = 3 days 5 hours 56 min 17 sec

FEC: 2375406 2837

CRC: 22 730

ES: 6 612

SES: 0 0

UAS: 0 0

LOS: 0 0

LOF: 0 0

LOM: 0 0



HELLO HG612
xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 23136 Kbps, Downstream rate = 64228 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 64294 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:     23136 kbps     64228 kbps
Actual Aggregate Tx Power:        6.8 dBm      12.4 dBm
====================================================================================
  VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 5.9 21.3 30.9   N/A   N/A 11.3 25.3 38.6
Signal Attenuation(dB): 5.9 20.7 29.9   N/A   N/A 15.1 25.1 38.6
SNR Margin(dB): 12.4 12.5 12.4   N/A   N/A 3.6 3.6 3.6
TX Power(dBm): -3.9 -22.5 6.6   N/A   N/A 8.0 7.9 6.9

Good Bye HG612



xdslcmd --version
xdslcmd version 1.0
DSL PHY: AnnexA version - A2pv6C038m.d24j
******* Pass *********


equipcmd swversion display
software version: V100R001C01B030SP08

xdsl firmware version: A2pv6C038m.d24j

cpu version: BCM6368

cfe version: 1.0.37-102.6

display version success
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mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #115 on: May 29, 2019, 01:01:24 PM »

Ok, I know I promised that I wouldnít post again. However I have Openreach out this morning and they have tried several things including a DLM reset. By completing these reset, interleaving was removed from the line. So I am going to just leave it alone now and see if DLM applies ReTX now that interleaving has turned off. The removal of interleaving actually reduced my attainable, but made my sync level with attainable. So I am now exactly 60000/19999
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j0hn

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Re: Cabinet 25 DSLAM Installation
« Reply #116 on: May 29, 2019, 03:36:22 PM »

Can you post a set of stats?
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mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #117 on: May 29, 2019, 03:48:15 PM »

Of course.

This is the "resync stats" from when the engineer reset DLM and the Interleaving dropped:

Code: [Select]
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 21398 Kbps, Downstream rate = 60084 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 60087 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): 6.2 7.0
Attn(dB): 16.3 0.0
Pwr(dBm): 12.3 6.8
VDSL2 framing
Bearer 0
MSGc: 18 26
B: 239 237
M: 1 1
T: 64 42
R: 0 16
S: 0.1271 0.3781
L: 15104 5374
D: 1 1
I: 240 127
N: 240 254
Counters
Bearer 0
OHF: 23507 11862
OHFErr: 0 0
RS: 0 498012
RSCorr: 0 0
RSUnCorr: 0 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 5514439 0
Data Cells: 96 0
Drop Cells: 0
Bit Errors: 0 0

ES: 56 1762
SES: 32 0
UAS: 2400 2368
AS: 48

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 2.04 3.98
OR: 94.03 64.22
AgR: 60180.91 20063.54

Bitswap: 0/0 1/1

Total time = 1 days 23 hours 27 min 48 sec
FEC: 0 6
CRC: 4773 3
ES: 56 1762
SES: 32 0
UAS: 2400 2368
LOS: 3 0
LOF: 30 0
LOM: 0 0
Latest 15 minutes time = 12 min 48 sec
FEC: 0 0
CRC: 4768 0
ES: 11 0
SES: 11 0
UAS: 608 597
LOS: 1 0
LOF: 10 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 3
CRC: 4 3
ES: 3 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 23 hours 27 min 48 sec
FEC: 0 6
CRC: 4773 3
ES: 36 224
SES: 32 0
UAS: 2326 2294
LOS: 3 0
LOF: 30 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 0
CRC: 0 0
ES: 7 260
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 47 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0


HELLO HG612
xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 21398 Kbps, Downstream rate = 60084 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 60087 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:     21398 kbps     60084 kbps
Actual Aggregate Tx Power:        6.8 dBm      12.3 dBm
 =========================================================================================
  VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 5.9 21.3 30.8   N/A   N/A 11.3 25.2 38.6
Signal Attenuation(dB): 5.9 20.6 29.9   N/A   N/A 15.1 25.0 38.6
SNR Margin(dB): 7.2 7.0 7.0   N/A   N/A 6.1 6.2 6.2
TX Power(dBm): -4.7 -22.2 6.5   N/A   N/A 7.7 7.9 7.0

Good Bye HG612
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j0hn

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Re: Cabinet 25 DSLAM Installation
« Reply #118 on: May 29, 2019, 05:10:53 PM »

If all goes well ReTx will be applied after 48 hours.
If every remains stable over the next week or so DLM may then lower the target SNRM.

Should hopefully give a nice increase in sync.
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Plusnet FTTC 80/20 -  ECI now Huawei cab
retx low @ 3dB target SNRM
Zyxel VMG1312-B10A bridged with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

mentaltom

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Re: Cabinet 25 DSLAM Installation
« Reply #119 on: June 12, 2019, 10:54:22 AM »

If all goes well ReTx will be applied after 48 hours.
If every remains stable over the next week or so DLM may then lower the target SNRM.

Should hopefully give a nice increase in sync.

So, I have been on holiday for the last week.  Interestingly I was in Lithuania staying in an apartment in the old town, where the most basic service available is 100/100 FTTP - with a 2ms ping.  ::) .  It's a given there that WAN is provided over FTTP and Copper is reserved for older people with a landline phone.  Anyway, still no change.  No G.INP, no Interleaving, no resyncs now for 12 days.  Connected at 60084 with an attainable of 58716. I have suggested to Openreach that because the DSLAM is new, it could be that the firmware has not been updated to the version capable of implementing G.INP.  Sky tell me that it is a positive that none of these features have been applied as it shows that the line does not suffer from excess noise and therefore DLM has decided these technologies do not need to be applied. It seems that DLM is just not working at all - not increasing speed, decreasing it, adding or removing anything.  I am not sure where I can go from here because of course no one is taking me seriously - I've written a letter to Openreach on the formal track. 

In addition, there are discrepancies between which ISPs allow customers to order FTTC, even after 6 weeks of live.  e.g. Sky shows that FTTC can be ordered, but Vodafone receives messages from Openreach saying there is a capacity issue at the cabinet, which I know isn't the case.  This is a bummer because if I were to order a second FTTC connection, I would not want to have both lines running over the same ISP for resilience.

I cannot believe after 2 years of this I am still having to pick up snags with Openreach - beware anyone offered a CFP through Openreach - you will be a free Implementation Manager for them for a number of months, yet without any of the technical information you require to do the job well!
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