Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: daveesh1 on October 22, 2017, 12:35:42 PM
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Hi guys and girls wonder if anybody can shed some light on this 33 days ago I had interleaving applied to my line which reduced my speed to 44207 from around 48. I am using a billion 8800axl apart from the SNR being reduced down to 4.7 a couple of days ago I can't see any reason why DLM should not of removed interleaving. Hereare the stats from the modem
Mode VDSL2
Traffic Type PTM
Status Up
Link Power State L0
Downstream Upstream
Line Coding (Trellis) On On
SNR Margin (dB) 4.7 6.0
Attenuation (dB) 22.4 0.0
Output Power (dBm) 5.0 5.0
Attainable Rate (Kbps) 48657 7440
Rate (Kbps) 44207 7355
B (# of bytes in Mux Data Frame) 51 230
M (# of Mux Data Frames in an RS codeword) 1 1
T (# of Mux Data Frames in an OH sub-frame) 64 5
R (# of redundancy bytes in the RS codeword) 12 16
S (# of data symbols over which the RS code word spans) 0.0374 0.9985
L (# of bits transmitted in each data symbol) 13680 1979
D (interleaver depth) 865 1
I (interleaver block size in bytes) 64 247
N (RS codeword size) 64 247
Delay (msec) 8 0
INP (DMT symbol) 3.00 0.00
OH Frames 1201559857 176251264
OH Frame Errors 2377 98
RS Words 2656540036 1638047
RS Correctable Errors 285341413 723
RS Uncorrectable Errors 145396 0
HEC Errors 34723 0
OCD Errors 16 0
LCD Errors 16 0
Total Cells 822573646 0
Data Cells 606759289 0
Bit Errors 0 0
Total ES 547 93
Total SES 0 0
Total UAS 26 26
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Assuming your mdws is the same as your user then it looks like your status is green. I would hope DLM would remove interleaving but it does not always seem to. Recently I was interleaved for 4 months with no action by DLM and no action from my ISP TalkTalk. I ended up emailing the BT CEO as this kind of situation is down to them, I was also capped for over a year which was another issue. I notice you are on an ECI cabinet and I am very suspicious that there is a DLM bug in these cabinets which stops interleaving being removed. So initially try your ISP to see if they will do anything, if they wont then consider contacting BT.
Stuart
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Yeah mdws username is the same. Yes I remember reading about your situation on your post. Might just contact ceo and see what happens cheers.
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I got rid of interleaving and delay by using a manual cap. I use a 8800nl v1. Dlm synced me down 5 weeks ago to 62 from 70 with interleaving and delay.
I put a manual cap of 54/20 on my 8800nl v1. 8 days after doing this dlm removed interleaving and delay. I then removed the cap and back to 70/20. Dlm held it back for 5 weeks and probably would have held it longer if not for a manual cap.
You could try it and see.
http://forum.kitz.co.uk/index.php/topic,16427.0.html
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How can you know that the line isn't achieving the ILQ green status because of the error protection that's been applied though? So you might not necessarily want to remove the thing that's making the line perform well.
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Well if you look at his MDWS you will see back on the 30th August he had one bad day with 3000+ ES and prior to that he was well within the standard profile which I suspect he may well be on. This in my experience is typical of DLM reacting to one very bad day when I suspect if it had been left it would have been OK. Be interesting to know what happened that day? Was it a thunderstorm I wonder. DLM in my view is far too trigger happy to set interleaving and then not remove it based on one bad day where it should be looking at days around the bad one to see if there is a pattern rather than jumping in when it may well not be necessary.
Stuart
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Not a thunderstorm was just a bad hour or so for errors and now I am paying the price. When line is on fast path I do get around 500 - 700 errors per day so always in amber which is fine as it doesn't effect me but this time DLM has done it's stuff and forgotten about me.