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[Sunzz]

hey everyone, ok so first off im not trying to be lazy or anything lol im currently googling all this to try and learn it all myself but id love some feedback from u pros if possible

my adsl checker estimates of 60 down and 16.8 upload lowest on a clean line

Im on an ECI cab and about 500 meters from it.

So for quite some time i had 50 down 6 up on an 80/20 fibre package, Then after some power cuts i was at 30/1.8 and ive had that speed for a few weeks until today when i put the hg612 in, now im getting 45 down and 3.19 up.

Plusnet said my line checks were all fine so iv had 2 bt engineers round but no faults been found, and the only thing the engineer really said was that im probable suffering from crosstalk.

Ive had dslstats up for about an hour and a half and was wondering how my stats look?

http://imgur.com/a/VWGul

EDIT: ok as im stupid i didnt even realise the expand and compress slider so the previous pictures arent good lmao reuploaded some here lol http://imgur.com/a/VWGul

DSLAM/MSAN type:           IFTN:0xb206 / v0xb206
Modem/router firmware:     AnnexA version - A2pv6C038m.d24j
DSL mode:                  VDSL2 Profile 17a
Status:                    Showtime
Uptime:                    1 hours 38 min 9 sec
Resyncs:                   0 (since 08 Dec 2016 13:21:40)
         
            Downstream   Upstream
Line attenuation (dB):     18.1      0.0
Signal attenuation (dB):   Not monitored      
Connection speed (kbps):   48084      3792
SNR margin (dB):           6.5      6.1
Power (dBm):               -3.4      -3.4
Interleave depth:          1      1
INP:                       0      0
G.INP:                     Not enabled      Not enabled
Vectoring status:          5 (VECT_UNCONFIGURED)      

RSCorr/RS (%):             0.0025      0.0015
RSUnCorr/RS (%):           0.0001      0.0000
ES/hour:                   5.06      6.51

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   0
Last initialization procedure status:   0
Max:   Upstream rate = 3839 Kbps, Downstream rate = 47856 Kbps
Bearer:   0, Upstream rate = 3792 Kbps, Downstream rate = 48084 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):    6.5       6.1
Attn(dB):    18.1       0.0
Pwr(dBm):   -3.4      -3.4
         VDSL2 framing
         Bearer 0
MSGc:      18      33
B:      239      118
M:      1      1
T:      64      5
R:      14      16
S:      0.1588      0.9954
L:      12792      1085
D:      1      1
I:      254      135
N:      254      135
         Counters
         Bearer 0
OHF:      2213977      349322
OHFErr:      16      13
RS:      141669467      1223669
RSCorr:      3605      32
RSUnCorr:   92      0

         Bearer 0
HEC:      72      0
OCD:      4      0
LCD:      4      0
Total Cells:   522002596      0
Data Cells:   18477392      0
Drop Cells:   0
Bit Errors:   0      0

ES:      14      13
SES:      0      0
UAS:      486      486
AS:      5649

         Bearer 0
INP:      0.00      0.00
INPRein:   0.00      0.00
delay:      0      0
PER:      2.55      16.23
OR:      75.24      19.21
AgR:      48159.59   3810.74

Bitswap:   4104/4105      3/3

Total time = 1 hours 42 min 15 sec
FEC:      3605      32
CRC:      16      13
ES:      14      13
SES:      0      0
UAS:      486      486
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 15 minutes time = 12 min 15 sec
FEC:      1017      4
CRC:      0      1
ES:      0      1
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Previous 15 minutes time = 15 min 0 sec
FEC:      917      0
CRC:      2      0
ES:      1      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 1 day time = 1 hours 42 min 15 sec
FEC:      3605      32
CRC:      16      13
ES:      14      13
SES:      0      0
UAS:      486      486
LOS:      0      0
LOF:      0      0
LOM:      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
LOM:      0      0
Since Link time = 1 hours 34 min 9 sec
FEC:      3605      32
CRC:      16      13
ES:      14      13
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
#

[underzone]

I don't know why, but you are missing tones 2000-2750. Your sync should be higher for an 18.1 dB line.

[NewtronStar]

Agree with underzone the U2 band is missing could you copy and paste the text of the pbParams

[Sunzz]

Agree with underzone the U2 band is missing could you copy and paste the text of the pbParams

Yeh i noticed that to, everyone else had the upload green lines there and i have nothing, also my U2 is flat on the snrm per band :S heres the pbparams

thanks for the replies btw guys i really appreciate it

EDIT: i even restarted the hg612 earlier just incase it was some sort of bug but its still the same, also i went back to an older firmware just incase that was the problem but its showing as the same, also the results are the same in hg612 modem stats

xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   0
Last initialization procedure status:   0
Max:   Upstream rate = 3655 Kbps, Downstream rate = 48604 Kbps
Bearer:   0, Upstream rate = 3615 Kbps, Downstream rate = 48836 Kbps

Discovery Phase (Initial) Band Plan
US: (6,31) (882,1193) (1984,2770)
DS: (33,857) (1218,1959) (2795,4083)
Medley Phase (Final) Band Plan
US: (6,31) (882,1193) (1984,2093)
DS: (41,857) (1218,1959) (2795,4083)
     VDSL Port Details        Upstream        Downstream
Attainable Net Data Rate:        3655 kbps          48604 kbps
Actual Aggregate Tx Power:      -   3.6 dBm        -   3.6 dBm
====================================================================================
  VDSL Band Status   U0   U1   U2   U3   U4   D1   D2   D3
  Line Attenuation(dB):   0.6   23.3   35.6   N/A   N/A   12.8   30.1   47.4
Signal Attenuation(dB):   0.5   23.1   0.0   N/A   N/A   12.0   29.8   47.4
        SNR Margin(dB):   6.9   6.1   0.0   N/A   N/A   6.4   6.4   6.4
         TX Power(dBm):   -4.5   -18.9   -11.3   N/A   N/A   10.6   7.3   7.3
#

[ejs]

Normally, crosstalk from the upstream signals is managed to a degree by Upstream Power Back-Off (UPBO). UPBO arranges for modems on shorter lines to reduce the power level they transmit their upstream signals at, so that at the cabinet, all the upstream signals from different lines arrive at the same power level (the signals from longer lines being attenuated more by the length of line).

So I suppose it's possible that someone else using a third-party modem with UPBO disabled could adversely affect your upstream speed. Without UPBO, their modem would be transmitting at full power, and especially if they are on a line of similar length or shorter than yours, their upstream signals would be stronger than yours when received at the cabinet. This would cause significant crosstalk, which would appear as noise on your upstream frequencies, possibly consistent with your raised QLN on your U2 band.

However I think it's fairly uncommon for someone to be using anything other than their ISP-supplied device. And there is no way to verify this theory without tracking down the offending modem, if it exists. Openreach ought to be able to see details of the modem each line is using, but I've never heard of them identifying non-compliant devices, even when they might be affecting the performance of other lines.

[Chrysalis]

The sync is low in both directions especially on the upstream which is way down on what it should be, I think even in a worse case scenario I would expect at least 10mbit on that line upstream.

The missing U2 needs investigating but I dont know how you would present the fault as tech support is dumbed down.

Also on the QLN graph most of the U2 range is incorrectly marked as 'other'.

EJS's UPBO explanation is possible.

[Sunzz]

Normally, crosstalk from the upstream signals is managed to a degree by Upstream Power Back-Off (UPBO). UPBO arranges for modems on shorter lines to reduce the power level they transmit their upstream signals at, so that at the cabinet, all the upstream signals from different lines arrive at the same power level (the signals from longer lines being attenuated more by the length of line).

So I suppose it's possible that someone else using a third-party modem with UPBO disabled could adversely affect your upstream speed. Without UPBO, their modem would be transmitting at full power, and especially if they are on a line of similar length or shorter than yours, their upstream signals would be stronger than yours when received at the cabinet. This would cause significant crosstalk, which would appear as noise on your upstream frequencies, possibly consistent with your raised QLN on your U2 band.

However I think it's fairly uncommon for someone to be using anything other than their ISP-supplied device. And there is no way to verify this theory without tracking down the offending modem, if it exists. Openreach ought to be able to see details of the modem each line is using, but I've never heard of them identifying non-compliant devices, even when they might be affecting the performance of other lines.

Hmm ok bare with me as im a beginner in all this lol, would i be able to get a router that has a disable UPBO option and turn it off as well? to kinda even it out? sorry if im stupid lol. i had a lil google and noticed some routers have the off option! which is pretty cool, like asus https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjGsrvklujQAhWlJMAKHclQBf8QFgggMAE&url=https%3A%2F%2Fwww.asus.com%2Fsupport%2Ffaq%2F1015709%2F&usg=AFQjCNHImC0wlhCYAcsiGd2ANEbERib2dg&sig2=cxHJzG1u6LNNwvQ6feKyqg

[ejs]

If their line is shorter than yours, then their upstream signal would still be stronger than yours when they reach the cabinet.

[Sunzz]

If their line is shorter than yours, then their upstream signal would still be stronger than yours when they reach the cabinet.

ooo, hmmm, just curious do you know hwy my power is in the minus? Pwr(dBm):   -3.4      -3.4 ? everyone elses stats iv seen its always positive

[ejs]

No, but both up and down showing the same value is a reporting bug on ECI cabinets.

[Ronski]

I have a similar problem,  although download is not affected. I'm at 450 to 500 meters and my upload has gone from 12 Mbps to around 4.5. The bit loading on the tones the modem is using is very low.

[Sunzz]

No, but both up and down showing the same value is a reporting bug on ECI cabinets.

Well EJS, it turns out you are a genius! . So  last night before i got my new router, i had the bt home hub into the hg612 setup so i could see my stats, as u know i was missing tones etc. I always had -3.something power and as u know i was getting bad upload speed. My speed, power dbm has flown up! all i done was disabled that upstream power settings, sucks because i wouldnt normally use something like that but as my speed dropped so low, even 1.5 upload now and then, i think iv gota fight fire with fire here

[Ronski]

Nice improvement there, I wonder what affect it's had on others, though we'll never know.

I'll keep this option in mind should mine deteriorate too much.

[burakkucat]

A short comment on power levels.

Notice that the unit of power being discussed here is dBm. In words, that is decibels relative to one milliwatt.

So a reported power level of 0 dBm is equivalent to 1 mW.

Likewise a reported power level of 1 dBm is equivalent to 1.3 mW, whilst a reported power level of -1 dBm is equivalent to 0.794 mW.

Just because the sign is negative it does not mean the power is a negative quantity. With units of dBm, a negative sign indicates that the power is less than one milliwatt.

The Wikipedia dBm page is a good starting point when attempting to understand the subject. 

[Sunzz]

A short comment on power levels.

Notice that the unit of power being discussed here is dBm. In words, that is decibels relative to one milliwatt.

So a reported power level of 0 dBm is equivalent to 1 mW.

Likewise a reported power level of 1 dBm is equivalent to 1.3 mW, whilst a reported power level of -1 dBm is equivalent to 0.794 mW.

Just because the sign is negative it does not mean the power is a negative quantity. With units of dBm, a negative sign indicates that the power is less than one milliwatt.

The Wikipedia dBm page is a good starting point when attempting to understand the subject. 

ooo, well the reason the power dbm stood out to me is because, all over the forum, lookng at other people stats iv never see anyone else that had -3.4, not even - etc lol it was always in the positive. When reading the explanation on upstream back off power it actually says there can be problems with the dslam not giving off the right amount of power etc so fingers crossed im not affecting others.