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Author Topic: Badly hit by crosstalk  (Read 5601 times)

johnson

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Re: Badly hit by crosstalk
« Reply #15 on: May 14, 2019, 05:01:48 PM »

adslmax what do you use your connection for?

Some streaming? General web browsing?

Any real impact from the change in speed to what you do with it?

I have a 25/1 connection and its enough for 2 people to stream, game, do what they like. Do I want a faster connection? Yes. But would it really make any difference to day to day life? Nope.

Enjoy your 60-80 down and 20 up! Go watch some TV or play some games!  ;D
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adslmax

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Re: Badly hit by crosstalk
« Reply #16 on: May 14, 2019, 05:07:57 PM »

 ;D I am off on holiday this thursday to Spain for two weeks. So, my broadband will stay active cos my daughter will use it for watching netflix.

Can't wait for my holiday break  :sun: :rain: :comp:
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burakkucat

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Re: Badly hit by crosstalk
« Reply #17 on: May 14, 2019, 10:39:32 PM »

If you currently don't need to use your connection to the Internet, then power down the modem whilst the repair work is ongoing. That way the DLM process will not take any action on your circuit.
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adslmax

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Re: Badly hit by crosstalk
« Reply #18 on: May 14, 2019, 10:51:31 PM »

The line went back to 80/20 shortly after 6pm so must be the work by openreach today.
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Chrysalis

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Re: Badly hit by crosstalk
« Reply #19 on: May 15, 2019, 08:14:55 AM »

dont thin its crosstalk, looks like interference and probably caused by the ongoing work.
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adslmax

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Re: Badly hit by crosstalk
« Reply #20 on: May 15, 2019, 09:56:07 AM »

Everything went back to normal now.

SNR steady solid at 6.9dB for 15 hours now. But why is line attenuation increase to 12.7? Before used to be 11.5?

Code: [Select]
DSLAM type / SW version: BDCM:0xa48c (164.140) / v0xa48c
Modem/router firmware:  AnnexA version - A2pv6F039g1.d24m
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  15 hours 36 min 9 sec
Resyncs:                0 (since 15 May 2019 09:49:15)

Downstream Upstream
Line attenuation (dB):  12.7 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 79999 19999
SNR margin (dB):        6.9 12.5
Power (dBm):            12.5 0.6
Interleave depth:        16 1
INP:                    48.00 0
G.INP:                  Enabled Not enabled
Vectoring status:        5 (VECT_UNCONFIGURED)
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PhilipD

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Re: Badly hit by crosstalk
« Reply #21 on: May 15, 2019, 02:11:27 PM »

Hi

Everything went back to normal now.

SNR steady solid at 6.9dB for 15 hours now. But why is line attenuation increase to 12.7? Before used to be 11.5?

Code: [Select]
DSLAM type / SW version: BDCM:0xa48c (164.140) / v0xa48c
Modem/router firmware:  AnnexA version - A2pv6F039g1.d24m
DSL mode:                VDSL2 Profile 17a
Status:                  Showtime
Uptime:                  15 hours 36 min 9 sec
Resyncs:                0 (since 15 May 2019 09:49:15)

Downstream Upstream
Line attenuation (dB):  12.7 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 79999 19999
SNR margin (dB):        6.9 12.5
Power (dBm):            12.5 0.6
Interleave depth:        16 1
INP:                    48.00 0
G.INP:                  Enabled Not enabled
Vectoring status:        5 (VECT_UNCONFIGURED)

Attenuation reported by modems is not the same attenuation as your physical line that BT might use to judge distance or speeds your line might get, with the modems attenuation more an average based on all frequencies received which varies meaning this attenuation figure can vary also.  Your true physical line attenuation which is measured at a fixed frequency of 300KHz is very likely completely unchanged.

The trouble is with modem stats is you can't really take any single figure and draw any conclusion from it changing, as its a balancing act you need to consider other values alongside it. 

I suspect your modem is receiving higher frequencies than it did before so your average attenuation has gone up, because these higher frequencies have a higher attenuation.  This actually shows an improvement in your line, the opposite of what we might expect seeing that attenuation figure go upwards.

Regards

Phil
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adslmax

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Re: Badly hit by crosstalk
« Reply #22 on: May 15, 2019, 07:30:53 PM »

Can see cable damaged on the ground by the fibre cabinet
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adslmax

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Re: Badly hit by crosstalk
« Reply #23 on: June 17, 2019, 01:48:18 AM »

My line has changed 13 hours ago. I just got back from my holiday went to Greece for my break. Was surprise to see large increase in max sync rate at 101151K with SNR at 10dB.  :o Has the cabinet got new line card?

Code: [Select]
Downstream Upstream
Line attenuation (dB):  11.1 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 80000 20000
SNR margin (dB):        10.1 13.0
Power (dBm):            12.4 0.3
Interleave depth:        16 8
INP:                    46.00 47.00
G.INP:                  Enabled Enabled
Vectoring status:        5 (VECT_UNCONFIGURED)

adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 32325 Kbps, Downstream rate = 101151 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 80000 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):        10.1             13.0
Attn(dB):        11.1            0.0
Pwr(dBm):        12.4            0.3

                        VDSL2 framing
                        Bearer 0
MSGc:           -6              -6
B:              130             97
M:              1               1
T:              0               0
R:              8               8
S:              0.0518          0.1554
L:              21468           5457
D:              16              8
I:              139             106
N:              139             106
Q:              16              8
V:              14              2
RxQueue:                57              39
TxQueue:                19              13
G.INP Framing:          18              18
G.INP lookback:         19              13
RRC bits:               24              24
                        Bearer 1
MSGc:           186             58
B:              0               0
M:              2               2
T:              2               2
R:              16              16
S:              5.3333          16.0000
L:              48              16
D:              3               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:         0               0
RS:             3838896416              566479
RSCorr:         1665            1546
RSUnCorr:       0               0
                        Bearer 1
OHF:            3106988         1022413
OHFErr:         0               0
RS:             37283860                3888325
RSCorr:         23              97
RSUnCorr:       0               0

                        Retransmit Counters
rtx_tx:         9252097         132
rtx_c:          202             1633884
rtx_uc:         0               323600

                        G.INP Counters
LEFTRS:         0               4451
minEFTR:        79999           20003
errFreeBits:    60892608                528201173

                        Bearer 0
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    3382818780              0
Data Cells:     385076385               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:             0               0
SES:            0               0
UAS:            0               0
AS:             49914

                        Bearer 0
INP:            46.00           47.00
INPRein:        0.00            0.00
delay:          0               0
PER:            0.00            0.00
OR:             0.01            0.01
AgR:            80614.82        20102.08

                        Bearer 1
INP:            4.00            4.00
INPRein:        4.00            4.00
delay:          3               0
PER:            16.06           16.06
OR:             95.62           31.87
AgR:            95.62   31.87

Bitswap:        0/0             0/0

Total time = 13 hours 51 min 54 sec
FEC:            1665            1546
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 15 minutes time = 6 min 54 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
Previous 15 minutes time = 15 min 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
Latest 1 day time = 13 hours 51 min 54 sec
FEC:            1665            1546
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
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 = 13 hours 51 min 53 sec
FEC:            1665            1546
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
 >

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kitz

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Re: Badly hit by crosstalk
« Reply #24 on: June 17, 2019, 09:30:31 AM »

Nice, that is quite some jump. 
It's possible that a couple of your disturbers may have their modems switched off if they are away on holiday.  When my immediate neighbours got FTTC I suddenly lost circa 10Mbps which is what took me down to ~65Mbps.    There are also another few cross talkers that I've noticed over the years who have taken a good chunk of my sync speed.   However ~30Mbps seems to be rather a lot for just 1 or 2 cross talkers.


Interestingly, I notice that you appear to have g.inp on your upstream, so I am assuming you may be on the new trial.
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dee.jay

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Re: Badly hit by crosstalk
« Reply #25 on: June 18, 2019, 08:35:59 AM »

Maybe now it'll stay at 80/20 and you can forget about it.
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adslmax

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Re: Badly hit by crosstalk
« Reply #26 on: June 18, 2019, 12:12:50 PM »

Something isn't right on my line. Since G.INP enabled on both as I only getting 20/18 in throughput speed. The thinkbroadband monitor is suffering packet loss. What was caused this? Any idea?

https://www.thinkbroadband.com/speedtest/1560855886821950155
https://www.speedtest.net/result/8346589409

https://www.thinkbroadband.com/broadband/monitoring/quality/share/d3e60413fe4ce714d2eff50230f56fe7210244e6

Microsoft Windows [Version 10.0.18362.175]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\Users\W7>ping www.bbc.co.uk

Pinging www.bbc.net.uk [212.58.244.26] with 32 bytes of data:
Reply from 212.58.244.26: bytes=32 time=13ms TTL=54
Reply from 212.58.244.26: bytes=32 time=12ms TTL=54
Reply from 212.58.244.26: bytes=32 time=13ms TTL=54
Reply from 212.58.244.26: bytes=32 time=12ms TTL=54

Ping statistics for 212.58.244.26:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 12ms, Maximum = 13ms, Average = 12ms

C:\Users\W7>


« Last Edit: June 18, 2019, 12:23:30 PM by adslmax »
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kitz

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Re: Badly hit by crosstalk
« Reply #27 on: June 18, 2019, 12:32:12 PM »

Oh dear :(
How long has it been like that?    If I were you I'd raise a ticket as it looks like something is limiting your throughput.
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adslmax

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Re: Badly hit by crosstalk
« Reply #28 on: June 18, 2019, 12:40:51 PM »

It's been like this since I come back from Greece but I only find out when I ran the speedtest and never knew this so low throughput speed. I have to raise this with PN now.
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kitz

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Re: Badly hit by crosstalk
« Reply #29 on: June 18, 2019, 12:43:52 PM »

Quote
but I only find out when I ran the speedtest and never knew this so low throughput speed.

and when was that you noticed the low speedtest.
You can't say for sure if it is since you returned from Greece if you only just noticed it 30 mins ago.


btw..  which modem are you using right now?
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