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[custard]

Hello I've just registered to the forum but have been lurking for the past few weeks...

I was hoping to that I could pick the brains of someone knowledgeable here!

I had 80/20 on plusnet installed about a month ago and my initial profile was 66/20 with a locked ECI fub/R.

After some reading here, I bought a HG612 off ebay which I tested various firmwares with over the weekend.
I noticed my BT profile had dropped to 64/20.

Today I reverted back to the ECI but to my disappointment my profile dropped further to 58/20, so back I went to the hg612 with no further degradation in stats.

I think my multiple modem reboots/changes have caused an intervention but exactly what I don't know. Weekend stats and current stats are below. Can anyone see what has caused this change?

Weekend stats before drop

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 24354 Kbps, Downstream rate = 66952 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 66482 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): 6.1 9.0
Attn(dB): 0.0 0.0
Pwr(dBm): 13.4 6.9
VDSL2 framing
Path 0
B: 239 236
M: 1 1
T: 21 5
R: 0 16
S: 0.1149 0.3771
L: 16712 5410
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 17919166 2575070
OHFErr: 43 0
RS: 0 1655374
RSCorr: 0 2
RSUnCorr: 0 0

Path 0
HEC: 6 0
OCD: 1 0
LCD: 1 0
Total Cells: 4159780583 0
Data Cells: 18138791 0
Drop Cells: 0
Bit Errors: 0 0

ES: 42 0
SES: 0 0
UAS: 18 18
AS: 32550

Path 0
INP: 0.00 0.00
PER: 1.80 6.12
delay: 0.00 0.00
OR: 106.10 203.67

Bitswap: 6352 3

Total time = 9 hours 2 min 55 sec
FEC: 0 0
CRC: 43 0
ES: 42 0
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 2 min 55 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 4 0
ES: 4 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 9 hours 2 min 55 sec
FEC: 0 0
CRC: 43 0
ES: 42 0
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 9 hours 2 min 29 sec
FEC: 0 2
CRC: 43 0
ES: 42 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0


xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 24354 Kbps, Downstream rate = 66952 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 66482 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      24354 kbps         66952 kbps
Actual Aggregate Tx Power:        6.9 dBm          13.4 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB): 0.1 17.9 27.0   N/A 10.0 23.4 36.2
Signal Attenuation(dB): 0.1 17.7 26.9   N/A 10.0 23.4 36.2
        SNR Margin(dB): 8.9 8.8 9.0   N/A 6.1 6.1 6.1
         TX Power(dBm): -3.7 -25.4 6.5   N/A 10.2 7.5 7.3


xdslcmd info --Bits
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 24354 Kbps, Downstream rate = 66952 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 66482 Kbps
Current stats

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23953 Kbps, Downstream rate = 66384 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 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): 7.8 6.6
Attn(dB): 0.0 0.0
Pwr(dBm): 13.3 4.9
VDSL2 framing
Path 0
B: 239 236
M: 1 1
T: 64 5
R: 0 16
S: 0.1273 0.3771
L: 15080 5410
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 9336984 378113
OHFErr: 83 1
RS: 0 657685
RSCorr: 0 27
RSUnCorr: 0 0

Path 0
HEC: 35 0
OCD: 1 0
LCD: 1 0
Total Cells: 2201901133 0
Data Cells: 4821368 0
Drop Cells: 0
Bit Errors: 0 0

ES: 57 1
SES: 0 0
UAS: 18 18
AS: 19095

Path 0
INP: 0.00 0.00
PER: 2.03 6.12
delay: 0.00 0.00
OR: 90.32 203.67

Bitswap: 3019 9

Total time = 5 hours 18 min 40 sec
FEC: 0 0
CRC: 83 0
ES: 57 1
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 3 min 40 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 1 0
ES: 1 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 5 hours 18 min 40 sec
FEC: 0 0
CRC: 83 0
ES: 57 1
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 5 hours 18 min 13 sec
FEC: 0 27
CRC: 83 1
ES: 57 1
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0


xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23953 Kbps, Downstream rate = 66384 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      23953 kbps         66384 kbps
Actual Aggregate Tx Power:        4.9 dBm          13.3 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB): 0.1 17.8 27.1   N/A 9.9 23.2 36.8
Signal Attenuation(dB): 0.1 17.6 27.0   N/A 9.9 23.2 36.8
        SNR Margin(dB): 6.6 6.8 6.6   N/A 7.7 7.8 7.8
         TX Power(dBm): -5.2 -29.2 4.4   N/A 10.2 7.2 7.4


xdslcmd info --Bits
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23953 Kbps, Downstream rate = 66384 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps

[NewtronStar]

After some reading here, I bought a HG612 off ebay which I tested various firmwares with over the weekend.
I noticed my BT profile had dropped to 64/20.

Today I reverted back to the ECI but to my disappointment my profile dropped further to 58/20, so back I went to the hg612 with no further degradation in stats.

Welcome to the Forum, I wish you had read all the post's relating to the new firmware, it's not an immediate effect it takes many weeks before you see any benefit from the firmware remember there is a 14 day wait for the DLM to increase a sync if it see's problems, so give it 1 month before you ditch it.

Now because you have turned off the HG612 during the firmware updates it does sometimes sync lower so you will have to persevere until the DLM increase's your sync, you need to be patient when it comes to FTTC firmware and the DLM.

[custard]

Thanks for your reply.

I do understand that DLM can take a while to revert back to max speeds once a fault has occurred.

I am to blame for not waiting long enough but can you see what intervention has happened in the stats?

I'm sure the hg612 with 035 blob will be connected for a while now as I want to moniter the stats...

[NewtronStar]

Thanks for your reply.

I do understand that DLM can take a while to revert back to max speeds once a fault has occurred.

I am to blame for not waiting long enough but can you see what intervention has happened in the stats?

I'm sure the hg612 with 035 blob will be connected for a while now as I want to moniter the stats...

Just a quick look it seems your SNRM has increased from 6.1dB to 7.8dB but that could be because of the time difference each stats was recorded (SNRM will drop in the evening and increase in the morning) so it best to grab the stats at the same time 6am 12pm 6PM and 12am

[custard]

Hi my SNRM was almost constant over a 24hr period when I did not reboot for long enough. Maybe something to do with the mk2 faceplate that is installed. I'll see if I can pop some graphs up later to show this.

From what I can see VDSL2 framing shows an increase for download under T from 21 to 64. Does this mean anything?

[kitz]

Max:   Upstream rate = 23953 Kbps, Downstream rate = 66384 Kbps
Path:   0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps

Whilst that may look a bit odd when compared to your previous figures.   The fact your SNRm is now 7.8 that would indicate that you chose a bad time to resync.  It also indicates that if you had performed a resync at the time that you took those stats then, your sync speed would be very similar to what it was previously.   NewtronStar already explained how SNRm varies over the course of the day.   

[custard]

Its very welcoming to have the forum owner answer to a newbies post!

Kitz - I take it you are inferring that my line was noisy at the time of resync so the SNRM was lower and the max attainable lower at that time. I had a look at my data and this does not seem to be the case. I was quite used to seeing the daily change in SNRM on my previous ADSL2+ line though.

My line stats 2 mins after resync yesterday.

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23936 Kbps, Downstream rate = 66856 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 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): 7.9 6.6
Attn(dB): 0.0 0.0
Pwr(dBm): 13.3 4.9
VDSL2 framing
Path 0
B: 239 236
M: 1 1
T: 64 5
R: 0 16
S: 0.1273 0.3771
L: 15080 5410
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 72368 24057
OHFErr: 2 0
RS: 0 1562941
RSCorr: 0 0
RSUnCorr: 0 0

Path 0
HEC: 2 0
OCD: 0 0
LCD: 0 0
Total Cells: 17037482 0
Data Cells: 2431 0
Drop Cells: 0
Bit Errors: 0 0

ES: 2 0
SES: 0 0
UAS: 18 18
AS: 149

Path 0
INP: 0.00 0.00
PER: 2.03 6.12
delay: 0.00 0.00
OR: 90.32 203.67

Bitswap: 11 1

Total time = 2 min 54 sec
FEC: 0 0
CRC: 2 0
ES: 2 0
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 2 min 54 sec
FEC: 0 0
CRC: 2 0
ES: 2 0
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 2 min 54 sec
FEC: 0 0
CRC: 2 0
ES: 2 0
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Previous 1 day time = 0 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 2 min 27 sec
FEC: 0 0
CRC: 2 0
ES: 2 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0


xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23936 Kbps, Downstream rate = 66856 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      23936 kbps         66856 kbps
Actual Aggregate Tx Power:        4.9 dBm          13.3 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB): 0.1 17.8 27.1   N/A 9.9 23.2 36.8
Signal Attenuation(dB): 0.1 17.6 27.0   N/A 9.9 23.2 36.8
        SNR Margin(dB): 7.1 6.6 6.6   N/A 7.9 7.9 7.9
         TX Power(dBm): -5.2 -29.2 4.4   N/A 10.2 7.2 7.4


xdslcmd info --Bits
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 23936 Kbps, Downstream rate = 66856 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps

Link to show minimal change in SNRM over 24hrs: https://drive.google.com/file/d/0B9NkU_n88rGObU5QLVFQd1plTnc/edit?usp=sharing

Link to show minimal change in max attainable rate over 24hrs: https://drive.google.com/file/d/0B9NkU_n88rGONVFPM2JHYTM3QTA/edit?usp=sharing

Could it be that I have been capped by OR as DLM has not intervened?

[NewtronStar]

I'll try to explain it, your Sync has dropped from 66482 Kbps to 59995 Kbps this will increase your SNRM margin it's all down to the DLM target margin of 6.0dB, so if my line sync's at 30000kbps my SNRM ranges from 6.7dB to 5.5dB (morning to evening) and if my line sync's at 27000kbps my SNRM ranges from 7.9dB to 6.4dB ( morning to evening) when I say sync this meens the (Path:) not the (Max: attainable)

so the slower your sync the higher the SNRM will be and a Higher SNRM is better than one thats is below 6.0dB on FTTC

[Bald_Eagle1]

Could it be that I have been capped by OR as DLM has not intervened?

From monitoring quite a few connections, this data does indiicate that DLM has automatically applied a DS cap of 60 Mbps:-

Max:    Upstream rate = 23936 Kbps, Downstream rate = 66856 Kbps
Path:    0, Upstream rate = 20000 Kbps, Downstream rate = 59995 Kbps



If there are no continuing 'issues' such as frequent resyncs etc. & if DS SNRM maintains a 'reasonable' margin above 6dB, it is likely that DLM will relent in a few days & give you back some of the sync speed that it has 'stolen'.

This can take up to 14 days or so.
In some cases we have seen it remain 'stuck' for much longer periods (indefinitely?), requiring an engineer's visit to check line quality & submit a request for DLM to be reset/recalced to provide a wide open profile again.

[custard]

Than you Bald_Eagle. That makes sense! Hopefully I don't have to wait too long for this to occur. Atleast you feel that this is DLM capping and not the ISP/OR. I'll keep the HG612 linked up for the foreseeable future to see what happens and maybe have a go at soldering a UART to the ECI.

[custard]

Didn't take too long for the stats to change.

There was a modem resync with retrain reason 2 last night and the stats have improved. T for vdsl framing has gone back down again aswell.

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 24008 Kbps, Downstream rate = 66156 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 65691 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): 6.1 6.7
Attn(dB): 0.0 0.0
Pwr(dBm): 13.4 4.9
VDSL2 framing
Path 0
B: 239 236
M: 1 1
T: 22 5
R: 0 16
S: 0.1163 0.3771
L: 16512 5410
D: 1 1
I: 240 255
N: 240 255
Counters
Path 0
OHF: 6069261 1908428
OHFErr: 14 0
RS: 0 3727464
RSCorr: 0 0
RSUnCorr: 0 0

Path 0
HEC: 2 0
OCD: 0 0
LCD: 0 0
Total Cells: 1476045667 0
Data Cells: 872185 0
Drop Cells: 0
Bit Errors: 0 0

ES: 184 1
SES: 5 0
UAS: 36 36
AS: 11690

Path 0
INP: 0.00 0.00
PER: 1.91 6.12
delay: 0.00 0.00
OR: 100.07 203.67

Bitswap: 1854 2

Total time = 1 days 13 hours 16 min 31 sec
FEC: 0 0
CRC: 2546 0
ES: 184 1
SES: 5 0
UAS: 36 36
LOS: 5 0
LOF: 5 0
Latest 15 minutes time = 1 min 31 sec
FEC: 0 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 0 0
CRC: 2 0
ES: 2 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 13 hours 16 min 31 sec
FEC: 0 0
CRC: 2395 0
ES: 68 0
SES: 5 0
UAS: 18 18
LOS: 5 0
LOF: 5 0
Previous 1 day time = 24 hours 0 sec
FEC: 0 0
CRC: 151 0
ES: 116 1
SES: 0 0
UAS: 18 18
LOS: 0 0
LOF: 0 0
Since Link time = 3 hours 14 min 49 sec
FEC: 0 0
CRC: 14 0
ES: 14 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0


xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 24008 Kbps, Downstream rate = 66156 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 65691 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
       VDSL Port Details       Upstream        Downstream
Attainable Net Data Rate:      24008 kbps         66156 kbps
Actual Aggregate Tx Power:        4.9 dBm          13.4 dBm
============================================================================
  VDSL Band Status        U0      U1      U2      U3      D1      D2      D3
  Line Attenuation(dB): 0.1 17.9 27.1   N/A 10.0 23.3 36.9
Signal Attenuation(dB): 0.1 17.7 27.1   N/A 10.0 23.3 36.9
        SNR Margin(dB): 6.5 6.7 6.7   N/A 6.1 6.2 6.1
         TX Power(dBm): -5.2 -29.3 4.4   N/A 10.3 7.5 7.2


xdslcmd info --Bits
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 24008 Kbps, Downstream rate = 66156 Kbps
Path: 0, Upstream rate = 20000 Kbps, Downstream rate = 65691 Kbps

[Bald_Eagle1]

Multiplying your current sync speed of 65.691 Mbps by the usual 0.9679 would give a BT Profile of around 63.58 Mbps.

Occasionally, resyncs are too quick (especially retrain reason 2 resyncs) to initiate a new PPPoE session & the BT Profile isn't updated.

If that is the case, a ROUTER restart or ROUTER software disconnect/reconnect should initiate a new a new session & update the BT Profile without DLM taking any action.

[Chrysalis]

you seem to be a case where your line was banded but still on fast path.

your error rates are good so I have no idea why DLM did what it did.

Your stats have interested me tho, lower attenuation than me but only a slightly higher sync speed, not many people have a worse attenuation to sync speed ratio than me.

[custard]

On that basis my highest sync was with the ECI at 66.28/0.9679 = 68.48Mbps. That indicates a loss of approx 3mbps with the HG612 on a ECI DSLAM. I'd like to see if the hg612 attains that speed over the next month if i don't resync the modem.

On a sidenote my internet yesterday while i was on the lower sync was atrocious with frequent non-loading of pages. Today its back to normal.

Chrysalis - Sounds like i still have room for improvement! Does your SNRM vary much throughout the day and what do you estimate your line length to be? I think mine is approx 400m.

[Bald_Eagle1]

On that basis my highest sync was with the ECI at 66.28/0.9679 = 68.48Mbps. That indicates a loss of approx 3mbps with the HG612 on a ECI DSLAM. I'd like to see if the hg612 attains that speed over the next month if i don't resync the modem.

Your stats tell us that you are using a pre-update version of firmware.

If it's not blocked from receiving updates, you modem's firmware may well be updated by BT within a few days.

Alternatively, you can download updated versions from here:-

https://mega.co.nz/#F!LdJFDIJL!e_E1twsIg2kTet8mPjrb4w

I would personally recommend this version from the Experimental area:-

bcm96368MVWG_fs_kernel_HG612V100R001C01B030SP06_unlockedgui


As the updated firmware versions use slightly different tone bands for bitloading, some users see an increase in sync speeds & performance when using them.