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Author Topic: FTTC - Interleaved again!  (Read 2160 times)

g3uiss

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Re: FTTC - Interleaved again!
« Reply #30 on: September 05, 2021, 09:17:58 AM »

Yes ECI. CRC normally higher than ES you show CRC. On my circuit 24hrs. CRC 561 ES 129.
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #31 on: September 05, 2021, 04:10:55 PM »

Yes ECI. CRC normally higher than ES you show CRC. On my circuit 24hrs. CRC 561 ES 129.

I believe DSLAM will react to it in 7 days or less if its too high?

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g3uiss

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Re: FTTC - Interleaved again!
« Reply #32 on: September 05, 2021, 04:39:27 PM »

No thatís not right. The DSLAM isnít the issue itís the DLM and it acts in 24hrs but NOT on those figures! And you keep quoting CRC Not ES.

And in any event you canít stop it !

Read here.
https://kitz.co.uk/adsl/DLM_system.htm

But the 2880 ES fig is lower now but we donít know by how much.
« Last Edit: September 05, 2021, 04:42:28 PM by g3uiss »
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j0hn

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Re: FTTC - Interleaved again!
« Reply #33 on: September 06, 2021, 03:10:08 PM »

And you keep quoting CRC Not ES.

Every image he's posted has both CRC & ES.
If viewing on a smaller screen you need to scroll to the right of the images to see the ES figures.

I believe DSLAM will react to it in 7 days or less if its too high?

The DLM will apply Interleaving within 24 hours of breaking the ES threshold.

We have no idea what the limits are now but to my eye you have nothing to worry about at the moment.
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g3uiss

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Re: FTTC - Interleaved again!
« Reply #34 on: September 06, 2021, 05:42:03 PM »

Oh thanks @j0hn and the ES seem quite ok to me also to retain fastpath
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #35 on: September 07, 2021, 03:28:11 AM »

Sorry if it's not as visible, here's txt at this current time  :).

Not change to interleaving so far so it might be within the okay, i normally see it go wrong with 3 or 4 days of a reset but this was done by itself no engineer needed to bring it back off interleaving.


Sync
52541 Kbps

17954 Kbps

Attainable
52541 Kbps

17980 Kbps

SNR
5.8 dB

6.0 dB

Attenuation
20.2 dB

0.0 dB

CRC
3647

3

ES
1477

2

SES
0

0

FEC
0

1191
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g3uiss

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Re: FTTC - Interleaved again!
« Reply #36 on: September 09, 2021, 11:03:21 PM »

I donít think there is anything to concern you !
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #37 on: November 03, 2021, 04:56:58 PM »

Well I was not interleaved for a long time, now for a few days i'm back on the god awful 8ms increase.

7 Days shows I had a LOF's and LOS.

xdslctl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:   1
Last initialization procedure status:   0
Max:   Upstream rate = 17900 Kbps, Downstream rate = 59469 Kbps
Bearer:   0, Upstream rate = 17764 Kbps, Downstream rate = 50282 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):    5.9       6.0
Attn(dB):    20.2       0.0
Pwr(dBm):    6.9       6.8

         VDSL2 framing
         Bearer 0
MSGc:      18      14
B:      51      238
M:      1      1
T:      64      16
R:      12      16
S:      0.0329      0.4283
L:      15560      4763
D:      985      1
I:      64      255
N:      64      255

         Counters
         Bearer 0
OHF:      139438805      1411142
OHFErr:      192      0
RS:      1336475805      821508
RSCorr:      564189      616
RSUnCorr:   6988      0

         Bearer 0
HEC:      1312      0
OCD:      0      0
LCD:      0      0
Total Cells:   2735774617      0
Data Cells:   3621606102      0
Drop Cells:   0
Bit Errors:   0      0

ES:      1863      0
SES:      192      0
UAS:      480      469
AS:      294881

         Bearer 0
INP:      3.00      0.00
INPRein:   0.00      0.00
delay:      8      0
PER:      2.11      6.87
OR:      90.81      23.25
AgR:      50373.22   17787.09

Bitswap:   30564/30583      1461/1468

Total time = 7 days 4 hours 27 min 2 sec
FEC:      564189      616
CRC:      192      0
ES:      1863      0
SES:      192      0
UAS:      480      469
LOS:      1      0
LOF:      6      0
LOM:      0      0
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g3uiss

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Re: FTTC - Interleaved again!
« Reply #38 on: November 03, 2021, 04:59:29 PM »

Those errors are the result of the resync. Given your speed how is the interleave affecting your use of the circuit I wonder ?
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #39 on: November 07, 2021, 09:41:20 PM »

Hi g3uiss,

The line can run on no interleave something just keeps triggering it. Last time they had to go to the exchange and cabinet as they noticed a feedback or something like this?
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #40 on: November 19, 2021, 06:43:47 PM »

Hi Guys,

Can anyone make out the below? Interleaving normally shows increased bandwidth capacity but of course this is just a false display due to interleaving being applied at 8ms.

However today it's now changed from standard 6 SNR to 7.5 SNR and a higher attainable again?

Normally increased SNR results lower bandwidth so i don't understand how it's gone from 59Mbps to now 64Mbps?

====================================================================================
    VDSL Training Status:   Showtime
                    Mode:   VDSL2 Annex B
            VDSL Profile:   Profile 17a
                G.Vector:   Disable
            Traffic Type:   PTM Mode
             Link Uptime:   8 days: 18 hours: 1 minute
====================================================================================
       VDSL Port Details       Upstream         Downstream
               Line Rate:     17.951 Mbps       50.010 Mbps
    Actual Net Data Rate:     17.928 Mbps       49.920 Mbps
          Trellis Coding:         ON                ON
              SNR Margin:        6.7 dB            7.6 dB
            Actual Delay:          0 ms              8 ms
          Transmit Power:        6.8 dBm           6.9 dBm
           Receive Power:       -6.9 dBm          -8.6 dBm
              Actual INP:        0.0 symbols       3.0 symbols
       Total Attenuation:        0.0 dB          20.1 dB
Attainable Net Data Rate:     19.063 Mbps       64.499 Mbps
====================================================================================
  VDSL Band Status        U0      U1      U2      U3      U4      D1      D2      D3
  Line Attenuation(dB):    2.6    27.3    42.2     N/A     N/A    14.7    34.8    54.2   
Signal Attenuation(dB):    2.5    27.1    42.1     N/A     N/A    19.2    34.5    54.2   
        SNR Margin(dB):    6.5    6.7    6.7     N/A     N/A    7.6    7.6    7.6   
         TX Power(dBm):   -4.5   -15.3    6.4     N/A     N/A    10.5    7.2    7.4   
====================================================================================

            VDSL Counters

           Downstream        Upstream
Since Link time = 1 min 51 sec
FEC:      1417105      755
CRC:      530      4
ES:      146      4
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Latest 15 minutes time = 2 min 22 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:      7695      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 = 18 hours 2 min 22 sec
FEC:      88595      9
CRC:      31      0
ES:      9      0
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Previous 1 day time = 24 hours 0 sec
FEC:      90366      14
CRC:      13      1
ES:      5      1
SES:      0      0
UAS:      0      0
LOS:      0      0
LOF:      0      0
LOM:      0      0
Total time = 1 days 18 hours 2 min 22 sec
FEC:      1417105      755
CRC:      530      4
ES:      146      4
SES:      0      0
UAS:      30      30
LOS:      0      0
LOF:      0      0
LOM:      0      0
====================================================================================
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #41 on: November 19, 2021, 06:46:12 PM »

To add to this i've just noticed INP showing enabled?

Actual INP:        0.0 symbols       3.0 symbols

This is new considering the cabinet is ECI and not many if any have ECI enabled due to issues.
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j0hn

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Re: FTTC - Interleaved again!
« Reply #42 on: November 19, 2021, 07:00:56 PM »

INP is always enabled with Interleaving on Openreach VDSL2. It's usually 3 or 3.5 with 8ms delay.

It's G.INP that has issues with ECI cabinets.

If your attainable has increased and the SNRM has gone up then it's likely a crosstalker has gone offline. That looks like the impact of an individual line.
A neighbour on the cabinet has turned their modem off, gone on holiday or cancelled their broadband.

If you resync it will be slightly higher sync and the SNRM will return to normal.
However if the crosstalker comes back your SNRM would drop a similar amount.
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HitmanAlex

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Re: FTTC - Interleaved again!
« Reply #43 on: November 20, 2021, 10:42:50 AM »

Hi John,

Thank you for the response i think i might be getting mixed up with SNR and SNRM.

I know that Openreach are working on the back bone infrastructure for Fibre roll out in my area as it states on their site that its coming to my area (FTTP). I assume as per any other backbone network provider that they pull the fibre through the backbone infrastructure e.g. main roads ducts etc before they start hitting the residential areas.

Based on the stats you see, do you think it qualifies the reason to why i have been interleaved? It was flawless for over a month after open reach engineer did several tests and needed to go back to the exchange and cabinet to swap out some cables due to feedback on the line think it was Ohms or something?

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burakkucat

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Re: FTTC - Interleaved again!
« Reply #44 on: November 20, 2021, 04:02:37 PM »

It was flawless for over a month after open reach engineer did several tests and needed to go back to the exchange and cabinet to swap out some cables due to feedback on the line think it was Ohms or something?

I suspect it would have been the AC balance of the pair.
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