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[xreyuk]

Hi guys,

Recently moved over to FTTC with Plusnet. Had a few problems in the initial week as my speeds seemed to be all over the place. I've finally got an unlocked HG612 and wondered if someone would mind interpreting the stats for me?

BT profile according to the speed tester is 41.66Mbps, and Plusnet have me set at 42Mbps. Speed testing is generally showing between 39 and 40.5Mbps down, and 10Mbps up. Line has been up for about 18-19 hours from memory.

Code: [Select]

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12087 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2644)
DS: (33,859) (1216,1961) (2793,3408)
  VDSL Port Details   Upstream   Downstream
Attainable Net Data Rate:     12087 kbps     51204 kbps
Actual Aggregate Tx Power:        7.0 dBm      12.6 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 6.9 35.5 53.5   N/A   N/A 16.8 43.6 67.8
Signal Attenuation(dB): 6.9 34.6 51.9   N/A   N/A 25.0 43.2 68.6
SNR Margin(dB): 6.0 6.1 6.1   N/A   N/A 6.9 6.9 6.9
TX Power(dBm): 0.0 -7.4 5.6   N/A   N/A 9.9 7.8 3.8
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12080 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 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): 6.9 6.1
Attn(dB): 22.1 0.0
Pwr(dBm): 12.6 7.0
VDSL2 framing
Bearer 0
MSGc: 18 58
B: 51 237
M: 1 1
T: 64 33
R: 12 16
S: 0.0383 0.6297
L: 13376 3227
D: 845 1
I: 64 127
N: 64 254
Counters
Bearer 0
OHF: 28076340 186790
OHFErr: 99 86
RS: 2892472767 512583
RSCorr: 173669247 1238
RSUnCorr: 4616 0

Bearer 0
HEC: 1032 0
OCD: 37 0
LCD: 37 0
Total Cells: 1444066954 0
Data Cells: 5740135 0
Drop Cells: 0
Bit Errors: 0 0

ES: 27 90
SES: 0 0
UAS: 24 24
AS: 69050

Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.45 10.43
OR: 78.07 49.08
AgR: 43302.84 12047.83

Bitswap: 33243/33243 12011/12011

Does everything look like it matches up, and is as it should be? Is there any good information I can find out such as the type of equipment I'm connected to, or DLM intervention etc?

Is there anything I can do to improve my speeds/stats?

Much appreciated

[Bald_Eagle1]

I have slightly reformatted your stats for easier viewing:-

Code: [Select]

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12087 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2644)
DS: (33,859) (1216,1961) (2793,3408)
  VDSL Port Details    Upstream    Downstream
Attainable Net Data Rate:      12087 kbps      51204 kbps
Actual Aggregate Tx Power:         7.0 dBm       12.6 dBm
====================================================================================
     VDSL Band Status U0 U1 U2 U3   U4 D1 D2 D3
  Line Attenuation(dB): 6.9 35.5 53.5    N/A    N/A 16.8 43.6 67.8
 Signal Attenuation(dB): 6.9 34.6 51.9    N/A    N/A 25.0 43.2 68.6
SNR Margin(dB): 6.0 6.1 6.1    N/A    N/A 6.9 6.9 6.9
TX Power(dBm): 0.0 -7.4 5.6    N/A    N/A 9.9 7.8 3.8
 # xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12080 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 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): 6.9 6.1
Attn(dB): 22.1 0.0
Pwr(dBm): 12.6 7.0
VDSL2 framing
Bearer 0
MSGc: 18 58
B: 51 237
M: 1 1
T: 64 33
R: 12 16
S: 0.0383 0.6297
L: 13376 3227
D: 845 1
I: 64 127
N: 64 254
Counters
Bearer 0
OHF: 28076340 186790
OHFErr: 99 86
RS: 2892472767 512583
RSCorr: 173669247 1238
RSUnCorr: 4616 0

Bearer 0
HEC: 1032 0
OCD: 37 0
LCD: 37 0
Total Cells: 1444066954 0
Data Cells: 5740135 0
Drop Cells: 0
Bit Errors: 0 0

ES: 27 90
SES: 0 0
UAS: 24 24
AS: 69050

Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.45 10.43
OR: 78.07 49.08
AgR: 43302.84 12047.83

Bitswap: 33243/33243 12011/12011



Looking at your Discovery Phase band plans, you are connected to a Huawei DSLAM:-

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)


Medley Phase confirms you are able to use all 3 US & DS bands, but only some of the higher frequency U2 & D3 bands

Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2644)
DS: (33,859) (1216,1961) (2793,3408)


You have a reasonably high DS Interleaving depth, so there must have been some interference/noise (or a number of modem reboots in fairly quick succession):-

D:       845       1

This has added the first levels of DS Impulse Noise Protection & delay:-

INP:       3.00       0.00
INPRein:    0.00       0.00
delay:       8       0


Your connection had been up for approximately 19.18 hours at the time you grabbed the stats:-

AS:       69050 (Available Seconds)


It looks like you might slightly improve DS sync speed if you rebooted the HG612 modem at a quiet time (say around 1pm) as your DS SNRM is 6.9 against the target 6.0 dB:-

SNR Margin(dB):    6.0    6.1    6.1      N/A      N/A    6.9    6.9    6.9   

Go easy on the reboots though as DLM takes quite aggressive action if too many disconnections occur within a short timeframe.




You do have a bit of extra DS signal Attenuation compared to Line Attenuation in the D1 band:-

Code: [Select]

     VDSL Band Status U0 U1 U2 U3   U4 D1 D2 D3
  Line Attenuation(dB): 6.9 35.5 53.5    N/A    N/A 16.8 43.6 67.8
 Signal Attenuation(dB): 6.9 34.6 51.9    N/A    N/A 25.0 43.2 68.6

That suggests a fairly 'noisy' connection - possibly the result of crosstalk.




Depending on your distance from the cabinet, your stats may well be perfectly acceptable.
Do you know the actual distance from your cabinet?



See the attached graphs from HG612 Modem Stats for my connection.
I was able to achieve up to 35 Mbps DS sync speed for around 7 months until crosstalk from new users from the same cabinet gradually clobbered it.



If you really want to watch/monitor your stats closely you could use the HG612 Modem Stats and/or DSLStats programs:-

HG612 Modem Stats


Note:

The HG612 Modem Stats package is due to be updated to v 3.0.0.0 this week, but installing v 2.1 & then updating just the programs to v 3.0.0.0 would be fine.

The updated programs can be obtained here:-

Ronski's Site



and:-

DSLstats Website



The QLN & Hlog graphs from either/both of those monitoring packages would confirm how good/bad your noise levels & physical line properties are.



Finally, your BT IP Profile should be around 41.84 Mbps (roughly 96.79% of your 43225 Kbps sync speed).

Sometimes the ROUTER/Hub (not the HG612 modem) needs to be disconnected/reconnected to force an IP Profile update.

[xreyuk]

Looking at your Discovery Phase band plans, you are connected to a Huawei DSLAM:-

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)

Medley Phase confirms you are able to use all 3 US & DS bands, but only some of the higher frequency U2 & D3 bands

Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2644)
DS: (33,859) (1216,1961) (2793,3408)

Thanks, what does this mean? Would I be right in assuming higher frequency channels allow for higher sync speeds?

You have a reasonably high DS Interleaving depth, so there must have been some interference/noise (or a number of modem reboots in fairly quick succession):-

D:       845       1

This has added the first levels of DS Impulse Noise Protection & delay:-

INP:       3.00       0.00
INPRein:    0.00       0.00
delay:       8       0

This was slightly less before the latest reboot. I installed the HG612 and had to power it off again to move some wires around about 5 minutes later. This was 2 resyncs in 5 minutes, and before the resync the DS level was (and I'm going from memory but I'm sure) in the 300s.

The INP and delay were still the same however.

It looks like you might slightly improve DS sync speed if you rebooted the HG612 modem at a quiet time (say around 1pm) as your DS SNRM is 6.9 against the target 6.0 dB:-

SNR Margin(dB):    6.0    6.1    6.1      N/A      N/A    6.9    6.9    6.9   

Go easy on the reboots though as DLM takes quite aggressive action if too many disconnections occur within a short timeframe.

Bearing this in mind, do you think I should do the reboot tomorrow when I'm off work? Or would you leave it for a couple of weeks to allow DLM to settle down? I think from what you're saying and what Plusnet have told me, I might be able to get slightly higher sync speed (initial sync was at 49.9Mbps).

It was rebooted twice yesterday, and had been stable for about 2 days beforehand, as DLM had been intervening almost daily up until then.

You do have a bit of extra DS signal Attenuation compared to Line Attenuation in the D1 band:-

Code: [Select]

     VDSL Band Status U0 U1 U2 U3   U4 D1 D2 D3
  Line Attenuation(dB): 6.9 35.5 53.5    N/A    N/A 16.8 43.6 67.8
 Signal Attenuation(dB): 6.9 34.6 51.9    N/A    N/A 25.0 43.2 68.6

That suggests a fairly 'noisy' connection - possibly the result of crosstalk.

Where could this be coming from? We ordered FTTC the day it went live on the cab, which was the very end of May, so it hasn't even been a month yet. I wouldn't have thought there were that many people on it. However, I'm sure we share a cab with another couple of streets (I've no idea where the cab is, but there isn't one down our road).

Depending on your distance from the cabinet, your stats may well be perfectly acceptable.
Do you know the actual distance from your cabinet?

As above, I haven't been able to locate the cabinet. I'm served by Southport Exchange, on Cabinet 33 if anyone knows how I can locate the cabinet from this information.

I'm looking at using DSLStats when we properly move in (I'm a linux user) but we've only just bought the property and we're not properly moved in yet, meaning my microserver isn't there .

With regards to my errors, do you think everything looks okay with those?

After seeing my stats, my download speeds have generally been between 39Mbps and 40.5Mbps, with around 9.5-10.5 Mbps upload. They seem normal to me, but wanted to confirm that those values were normal to everyone else based on my stats.

Really appreciate your feedback, and would appreciate anymore feedback

[Black Sheep]

PCP33 = Southbank Rd/Hampton Rd.

Mr Eagle and/or others will assist with your stats enquiries, I'm sure ? 

[xreyuk]

PCP33 = Southbank Rd/Hampton Rd.

Mr Eagle and/or others will assist with your stats enquiries, I'm sure ? 

Ha! Brilliant, thanks for that. I've been scouring for that information everywhere. Is there anywhere to retrieve that information or do you work in places that can get it?

*EDIT*

I knew that couldn't be right, I'm served by cabinet 44, not cabinet 33 . Sorry! Would you be able to tell me the location of that one?

[Black Sheep]

PCP44 = 148 Southbank Rd, mate. 

I work for BT Openreach as an engineer so have access to certain info that isn't publicly shared. However, there are some web-sites that do seem to offer up PCP locations ?? I don't know them personally, but if you ask on Kitz someone will tell you ?

HTH. 

[Bald_Eagle1]

Medley Phase confirms you are able to use all 3 US & DS bands, but only some of the higher frequency U2 & D3 bands

Thanks, what does this mean? Would I be right in assuming higher frequency channels allow for higher sync speeds?


Higher frequencies do allow higher sync speeds - if a connection can actually make use of them.
It appears that yours can't.

This was slightly less before the latest reboot. I installed the HG612 and had to power it off again to move some wires around about 5 minutes later. This was 2 resyncs in 5 minutes, and before the resync the DS level was (and I'm going from memory but I'm sure) in the 300s.

The INP and delay were still the same however.

DLM can be very aggressive, but I would have thought it could stand just a couple of reboots.
Perhaps there are 'other' interference factors at play, causing the interleaving depth to increase.

Go easy on the reboots though as DLM takes quite aggressive action if too many disconnections occur within a short timeframe.

Bearing this in mind, do you think I should do the reboot tomorrow when I'm off work? Or would you leave it for a couple of weeks to allow DLM to settle down? I think from what you're saying and what Plusnet have told me, I might be able to get slightly higher sync speed (initial sync was at 49.9Mbps).

It might be wise to leave it for 3 or 4 days or so, especially taking this comment into account:-

It was rebooted twice yesterday, and had been stable for about 2 days beforehand, as DLM had been intervening almost daily up until then.

You do have a bit of extra DS signal Attenuation compared to Line Attenuation in the D1 band:-

Code: [Select]

     VDSL Band Status U0 U1 U2 U3   U4 D1 D2 D3
  Line Attenuation(dB): 6.9 35.5 53.5    N/A    N/A 16.8 43.6 67.8
 Signal Attenuation(dB): 6.9 34.6 51.9    N/A    N/A 25.0 43.2 68.6

That suggests a fairly 'noisy' connection - possibly the result of crosstalk.

Where could this be coming from? We ordered FTTC the day it went live on the cab, which was the very end of May, so it hasn't even been a month yet. I wouldn't have thought there were that many people on it. However, I'm sure we share a cab with another couple of streets (I've no idea where the cab is, but there isn't one down our road).

It could be crosstalk, but it could also be many other things, such as televisions, fridges, street lights, LED lighting etc. etc.

With regards to my errors, do you think everything looks okay with those?

You have quite low CRC/RSUnCorr error counts & FEC errors look about right for your current Interleaving depth that is keeping the connection as stable as possible.

After seeing my stats, my download speeds have generally been between 39Mbps and 40.5Mbps, with around 9.5-10.5 Mbps upload. They seem normal to me, but wanted to confirm that those values were normal to everyone else based on my stats.

Really appreciate your feedback, and would appreciate anymore feedback

Seeing how things change over a period of time is the best indication on how well your connection performs.

DSLStats should assist with that.

[kitzuser87430]

there are some web-sites that do seem to offer up PCP locations ??

http://www.telecom-tariffs.co.uk/codelook.htm

Have a play about on the above website, it is not very logical....i tend to type in post code, click "lookup postcode"...scroll down below map....click on the locality....then click on "all nnn fibre cabinets".

You will only get postcodes of the cabs, not exact locations.


Ian

[NewtronStar]

This is what I do use the BT Availability checker it should give you your cabinet number your connected to, this number will also be printed in white on the cabinet, so all you need to do is walk to each cabinet and look for the number shown in the Availability checker.

[xreyuk]

Thanks guys.

@BE1 - I'm looking at around 800m by road from my property to the cabinet. I think I'll be leaving it for the next couple of weeks and I'll check DLM value every few days manually to see what it's doing, and take snapshots of the stats each day. When I move in, I'll have DSLStats running all the time.

I'm hoping that interleaving will come off eventually as DLM decided to take off interleaving at two points, and then put it back on, because my pings aren't that great at the moment, and they change depending on the gateway I'm on.

Thanks guys, anything else you can note would be more than welcome, appreciate all the help.

[Bald_Eagle1]

I'm not too sure with DSLDtats, but maybe you could set it to record a 24 hour window with snapshot graphs at the same time each day?

If so, you would be able to see how things such as SNRM, errors, bitswaps etc change & detect any patterns for certain times of day/night.

[roseway]

Yes, in DSLstats you can set the time per page to 24 hours, then snapshots will be taken every 24 hours.

[xreyuk]

Thanks

Whilst I was at home this morning, DLM decided to adjust my line and increased my down sync by about 3Mbps. It did however, put the interleaving up slightly, and left INP & delay the same.

BT Profile hasn't changed according to their speed tester, is this where I might need to do a PPPoE drop, or should BT have updated?

Here's the new stats, do these look much different? Any idea what might have caused the resync?

Code: [Select]

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 12046 Kbps, Downstream rate = 51360 Kbps
Bearer: 0, Upstream rate = 12236 Kbps, Downstream rate = 46430 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): 5.4 6.0
Attn(dB): 22.0 0.0
Pwr(dBm): 12.6 7.0
VDSL2 framing
Bearer 0
MSGc: 18 26
B: 51 237
M: 1 1
T: 64 51
R: 12 16
S: 0.0356 0.6184
L: 14368 3286
D: 909 1
I: 64 127
N: 64 254
Counters
Bearer 0
OHF: 442007 128262
OHFErr: 0 1
RS: 113043187 2244633
RSCorr: 5575 8
RSUnCorr: 0 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 9038652 0
Data Cells: 4855112 0
Drop Cells: 0
Bit Errors: 0 0

ES: 104 163
SES: 41 0
UAS: 112 68
AS: 1012

Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.28 7.91
OR: 83.85 32.34
AgR: 46514.30 12268.10

Bitswap: 530/530 113/113

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 12061 Kbps, Downstream rate = 51360 Kbps
Bearer: 0, Upstream rate = 12236 Kbps, Downstream rate = 46430 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2688)
DS: (33,859) (1216,1961) (2793,3405)

  VDSL Port Details   Upstream   Downstream
Attainable Net Data Rate:                 12061 kbps          51360 kbps
Actual Aggregate Tx Power:                   7.0 dBm      12.6 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB):         6.9        35.4        53.3        N/A        N/A        16.8        43.4        67.5
Signal Attenuation(dB):         6.9        34.6        51.9        N/A        N/A        25.0        43.0        68.3
SNR Margin(dB): 5.9         5.9         5.9        N/A        N/A         5.4         5.4         5.4
TX Power(dBm): 0.3        -7.5         5.7        N/A        N/A        10.0         7.8         3.7
#

Finally is there a guide anywhere telling me how I can interpret the outputs myself (Such as what all the different letters mean)?

Thanks again.

[roseway]

Finally is there a guide anywhere telling me how I can interpret the outputs myself (Such as what all the different letters mean)?

There's a lot of good information here:
http://forum.kitz.co.uk/index.php/topic,10289.msg205453.html#msg205453

[NewtronStar]

Finally is there a guide anywhere telling me how I can interpret the outputs myself (Such as what all the different letters mean)?

There's a lot of good information here:
http://forum.kitz.co.uk/index.php/topic,10289.msg205453.html#msg205453

I have to say Roseway thats an excellent thread and hidden away in the kitz database
thanks for the link