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Author Topic: Increased SNR following HG612 upgrade to lSP08  (Read 3353 times)

EFT

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Increased SNR following HG612 upgrade to lSP08
« on: May 22, 2015, 06:35:08 PM »

Hello all,

Great forum, lurk here a lot.

Have had rock solid connection and low errors for the last six months or so. Had fibre fitted last Jan and initial install gave me 22 megs.

The HH5A soon disappeared and thanks to you guys an unlocked HG612 went in and gave me a rock solid connection.

Speed topped out at around 26meg down and 5 up. Upgrading to SP08 took me to 30 down and 6 up.

SNR was always around 5.9 and 5.9 but since SP08 just reads 16.

Does this indicate noise on the line now? Or as I read, are some of the GUI stats borked with SP08?

Any help gratefully appreciated.
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EFT

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #1 on: May 22, 2015, 06:37:13 PM »

Hang on, pulling the stats means I've answered my own question here..

# xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   1
Last initialization procedure status:   0
Max:   Upstream rate = 6768 Kbps, Downstream rate = 29372 Kbps
Bearer:   0, Upstream rate = 6680 Kbps, Downstream rate = 29733 Kbps
Bearer:   1, Upstream rate = 0 Kbps, Downstream rate = 0 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):    6.3       6.3
Attn(dB):    26.8       0.0
Pwr(dBm):    11.7       6.5
         VDSL2 framing
         Bearer 0
MSGc:      -6      -6
B:      243      195
M:      1      1
T:      0      0
R:      10      10
S:      0.2613      0.9305
L:      7776      1771
D:      8      4
I:      254      206
N:      254      206
Q:      8      4
V:      0      2
RxQueue:      24      12
TxQueue:      8      6
G.INP Framing:      18      18
G.INP lookback:      8      6
RRC bits:      24      24
         Bearer 1
MSGc:      90      58
B:      0      0
M:      2      2
T:      2      2
R:      16      16
S:      10.6667      16.0000
L:      24      16
D:      1      1
I:      32      32
N:      32      32
Q:      0      0
V:      0      0
RxQueue:      0      0
TxQueue:      0      0
G.INP Framing:      0      0
G.INP lookback:      0      0
RRC bits:      0      0
         Counters
         Bearer 0
OHF:      0      0
OHFErr:      52      0
RS:      17168712      549201
RSCorr:      1626      27
RSUnCorr:   0      0
         Bearer 1
OHF:      70163      70442
OHFErr:      0      0
RS:      420607      281768
RSCorr:      50      5
RSUnCorr:   0      0

         Retransmit Counters
rtx_tx:      138392      48
rtx_c:      65944      2836
rtx_uc:      37510      382

         G.INP Counters
LEFTRS:      1737      107
minEFTR:   29731      6676
errFreeBits:   1189355      29205487

         Bearer 0
HEC:      0      0
OCD:      0      0
LCD:      0      0
Total Cells:   64344597      0
Data Cells:   459571      0
Drop Cells:   0
Bit Errors:   0      0

         Bearer 1
HEC:      0      0
OCD:      0      0
LCD:      0      0
Total Cells:   0      0
Data Cells:   0      0
Drop Cells:   0
Bit Errors:   0      0

ES:      55      0
SES:      20      0
UAS:      65      45
AS:      1128

         Bearer 0
INP:      48.00      40.00
INPRein:   0.00      0.00
delay:      0      0
PER:      0.00      0.00
OR:      0.01      0.01
AgR:      29763.17   6713.89

         Bearer 1
INP:      2.50      4.00
INPRein:   2.50      4.00
delay:      0      0
PER:      16.06      16.06
OR:      47.81      31.87
AgR:      47.81   31.87

Bitswap:   851/851      4/4

Total time = 48 min 22 sec
FEC:      604017      67
CRC:      1282      0
ES:      55      0
SES:      20      0
UAS:      65      45
LOS:      1      0
LOF:      8      0
LOM:      0      0
Latest 15 minutes time = 3 min 22 sec
FEC:      1582      10
CRC:      52      0
ES:      6      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:      44      17
CRC:      0      0
ES:      0      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 1 day time = 48 min 22 sec
FEC:      604017      67
CRC:      1282      0
ES:      55      0
SES:      20      0
UAS:      65      45
LOS:      1      0
LOF:      8      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 = 18 min 47 sec
FEC:      1626      27
CRC:      52      0
ES:      6      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
#
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EFT

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #2 on: May 22, 2015, 07:01:39 PM »

Any help on interpreting the stats would be useful. I'm on OSX so can't run all that lovely graphing software!

I was having an alarm system fitted at my house earlier. It got wired up to the phone line and BANG! - speed dropped to 12megs.

Logged in to the HG612 and suspected something was up. Was a bit thrown by the 26 SNR reading so asked him to immediately disconnect the system.
I figured something was interfering or that DLM has suddenly come and kicked my front door down.

Disconnected and voila - back to 29megs in a heartbeat.
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EFT

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #3 on: May 22, 2015, 07:07:04 PM »

And a bit more:


# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason:   1
Last initialization procedure status:   0
Max:   Upstream rate = 6802 Kbps, Downstream rate = 29160 Kbps
Bearer:   0, Upstream rate = 6680 Kbps, Downstream rate = 29733 Kbps
Bearer:   1, Upstream rate = 0 Kbps, Downstream rate = 0 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) (871,1204)
DS: (33,859) (1216,1952)
        VDSL Port Details        Upstream        Downstream
Attainable Net Data Rate:        6802 kbps          29160 kbps
Actual Aggregate Tx Power:          6.5 dBm           11.7 dBm
====================================================================================
   VDSL Band Status      U0      U1      U2   U3      U4      D1      D2      D3
  Line Attenuation(dB):    8.9    52.1     N/A     N/A     N/A    21.6    63.9    90.3   
Signal Attenuation(dB):    8.9    51.3     N/A     N/A     N/A    34.5    63.6     N/A   
      SNR Margin(dB):    6.4    6.4     N/A     N/A     N/A    6.1    6.2     N/A   
       TX Power(dBm):   -2.7    5.8     N/A     N/A     N/A    10.2    6.5     N/A   
#
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Bald_Eagle1

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #4 on: May 22, 2015, 08:47:51 PM »

My stats were similar to yours (slightly better in fact) when I had FTTC installed in 2011.
I was probably the first to be connected, via PlusNet, as BT continued to state for a good few months that it wasn't actually available.

These are my current stats (gradually degraded by increased crosstalk) on approx. 1100m line length:-

Code: [Select]
xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 5115 Kbps, Downstream rate = 20600 Kbps
Bearer: 0, Upstream rate = 4999 Kbps, Downstream rate = 21912 Kbps
Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 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) (871,1200)
DS: (33,859) (1216,1734)
  VDSL Port Details   Upstream   Downstream
Attainable Net Data Rate:      5115 kbps     20600 kbps
Actual Aggregate Tx Power:        6.9 dBm      12.6 dBm
====================================================================================
  VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
  Line Attenuation(dB): 8.2 54.4   N/A   N/A   N/A 21.9 66.8   N/A
Signal Attenuation(dB): 8.2 53.8   N/A   N/A   N/A 30.9 66.6   N/A
SNR Margin(dB): 5.9 6.1   N/A   N/A   N/A 5.6 5.6   N/A
TX Power(dBm): 0.1 5.9   N/A   N/A   N/A 11.6 6.1   N/A
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twdsamy

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #5 on: May 26, 2015, 09:32:10 PM »

Hi,

I have upgraded using 08, but the interface shows 06.

Does this mean the upgrade to 08 has failed ?

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Bald_Eagle1

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Re: Increased SNR following HG612 upgrade to lSP08
« Reply #6 on: May 26, 2015, 10:21:40 PM »

Hi,

Does this mean the upgrade to 08 has failed ?



Yes. It does mean that.

If you updated via them modem's GUI, it will appear to have worked, but it doesn't.

It has to be updated using the same method as for unlocking the modem for it to succeed.

The reset button on the back of the modem isn't the easiest to hold down fully for 10 seconds or so.
Maybe it was released by accident?

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