Kitz Forum
Broadband Related => FTTC and FTTP Issues => Topic started by: Shakermaker on September 22, 2018, 08:31:35 AM
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Good morning,
I am new here so go easy :)
I had an engineer out yesterday and he performed a dlm reset.
He said my line was capped at 35 meg and he changed it to 55 meg.
Do the below stats look to be in line with this as i expected a change in the early hours?
Stats recorded 22 Sep 2018 07:31:04
DSLAM type / SW version: IFTN:0xd086 (208.134) / v0xd086
Modem/router firmware: AnnexA version - A2pv6F039g1.d24m
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 17 hours 18 min 12 sec
Resyncs: 0 (since 21 Sep 2018 19:37:32)
Downstream Upstream
Line attenuation (dB): 18.9 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 43213 5521
SNR margin (dB): 6.4 6.2
Power (dBm): 13.4 -8.7
Interleave depth: 1 1
INP: 0 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): 0.0052 0.1482
RSUnCorr/RS (%): 0.0002 0.0000
ES/hour: 10.9 32.2
Thanks,
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Hi and welcome. :)
The reset appears to have worked and cleared the 35Mb cap. 55Mbp is more of a product cap set at the DSLAM.
Your line appears to be more or less running at full capability (Target SNRM is 6.3db).
From memory 20db atten gives some where in the 50 Mb range but it entirely depends upon the amount of crosstalk on your line.
You are also on an ECI cab so don't have the benefit of G.INP and x dB.
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Thanks for the info I'm about 500 meters away from the cab so I expected I bit more but still a lot happier than the 35 meg I was getting :)
Thanks
Sent from my Pixel 2 XL using Tapatalk
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>> I'm about 500 meters away from the cab
What does the dsl checker predict for your line?
https://www.dslchecker.bt.com/
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See attached,
Apparently according to BT a should get in between 52 and 55Mbps,
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Hmmm. That is rather low and you are only just above the handback threshold. :(
Presumably the engineer carried out the usual line tests as well as just resetting DLM?
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Yes he checked my master socket and said there was a fault at the cab and went off to fix it.
Then he rang me about an hour later to say he had applied the fix and done the reset.
My speed went up straight away to the 43Mbps when I thought DLM would do its thing overnight.
I did swap routers as soon as I came off the phone but surely this would not effect the reset?
I only plugged in my bt hub for the engineer visit as I didnt want him to refuse a fix due to using my own router.
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Hmmm. That is rather low and you are only just above the handback threshold. :(
Aren't they just below it?
See attached,
Apparently according to BT a should get in between 52 and 55Mbps,
That seems an extremely narrow estimate.
BT will have given you an estimate by email when you signed up or last renewed.
52-55Mb is a considerably narrower an estimate than I've ever seen before.
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How fast will it be?
We estimate your download speed will be between 54Mbps and 55Mbps, and your upload speed will be between 9Mbps and 10Mbps.
The minimum guaranteed speed you can expect from your broadband will be 49Mbps.
Actually it's narrower than I thought.
Sent from my Pixel 2 XL using Tapatalk
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Aren't they just below it?
Oops sorry my bad. :-[
Must have misread :( If its below the threshold then they can go back to the ISP - especially now its emerged that BTr themselves quoted above that figure.
>>43Mbps when I thought DLM would do its thing overnight.
Engineer resets take effect immediately. I can't see that DLM has anything more to give. Interleave = 1 (off). ECI cab so no G.INP.
SNRM at 6.4 (compared to 6.3) may give you a tiny bit more if you reboot your modem, but not much. :(
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No worries I will leave things alone for now.
I'm too scared to do any more reboots anyway due to DLM don't want to be dropped again.
Sent from my Pixel 2 XL using Tapatalk
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Wow, such a narrow estimate considering the BTw checker results.
The minimum guaranteed speed you can expect from your broadband will be 49Mbps.
That's the magic figure. You're well below it. You could call and request they try increase speeds.
They may try a pair swap/port swap if they haven't already.
If you're unlucky they may just say nothing more we can do and you would be free to leave your contact early.
That's not much good though as you would get the exact same from another ISP if on the same pair.
Interesting to note your line went straight to fastpath.
Recent DLM resets I've seen go interleaved, even on ECI cabs.
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On a few occasions I have noticed my SNR go up to 8.5db thus raising the attainable rate to 49Mbps.
If I was to do a reboot when this happens would my sync rate creep up to the attainable?
And more importantly would the sync rate stay there when the SNR drops back to 6db?
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That will most likely be when a neighbour temporarily goes off line and reduces the crosstalk affecting your line. If you reboot during this period you will probably get an increased connection speed, then when the crosstalk returns, your SNRM will drop to ~3 to 4 dB. Whether your connection remains stable is in the lap of the gods.
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Also a welcome from me Shakermaker.
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Well did a resync last night when my attainable went up and now syncing at 50Mbps :)
SNR dropped massively this morning so will see how it goes,
Stats recorded 23 Sep 2018 08:10:13
DSLAM type / SW version: IFTN:0xd086 (208.134) / v0xd086
Modem/router firmware: AnnexA version - A2pv6F039g1.d24m
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 11 hours 35 min 8 sec
Resyncs: 0 (since 23 Sep 2018 07:29:09)
Downstream Upstream
Line attenuation (dB): 18.9 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 50042 5942
SNR margin (dB): 4.3 5.2
Power (dBm): 13.6 -0.4
Interleave depth: 1 1
INP: 0 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): 0.2343 0.0057
RSUnCorr/RS (%): 0.0276 0.0000
ES/hour: 2560 41.9
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Oh dear this doesn't look good :(
Can anyone shed some light on the below?
Stats recorded 24 Sep 2018 19:58:16
DSLAM type / SW version: IFTN:0xd086 (208.134) / v0xd086
Modem/router firmware: AnnexA version - A2pv6F039g1.d24m
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 16 hours 16 min 26 sec
Resyncs: 1 (since 23 Sep 2018 18:48:12)
Downstream Upstream
Line attenuation (dB): 18.8 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 44026 5889
SNR margin (dB): 6.1 6.1
Power (dBm): 13.5 -0.3
Interleave depth: 861 1
INP: 3.00 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): 0.9555 0.0280
RSUnCorr/RS (%): 0.0002 0.0000
ES/hour: 488 2391
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I didn't think ECI cabs supported xdB hence assume 6dB is the target?
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I didn't think ECI cabs supported xdB hence assume 6dB is the target?
Yes, correct.
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It's actually been 4db for a day or so until about 30 minutes before my post it's the interleave depth I'm curious about
Sent from my Pixel 2 XL using Tapatalk
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It's actually been 4db for a day or so . . .
You circuit synchronised with the target SNRM of 6 dB, then one (or more) nearby crosstalker(s) "appeared" depressing your SNRM.
. . . it's the interleave depth I'm curious about
Hmm . . . From 1 to 861 is a large jump. :-\
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INP: 3.00 is the important figure. This is low interleave/error protection.
I can only assume that running the line at 4dB caused an increase in errors which attracted the attention of DLM to apply interleaving :(
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ETA just seen this from your stats when running at 4dB :'(
ES/hour: 2560
That will be why you have interleaving applied and why your speed has decreased.
ES/hour: 488 2391
The above doesnt look good either, but in theory that should decrease now interleave has been applied. If not and your line is still continuing to error it may be good reason to get your ISP involved again.
Did you get those stats from DSLstats? It may be worthwhile checking some of the graphs such as SNRm & errors.
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That will most likely be when a neighbour temporarily goes off line and reduces the crosstalk affecting your line. If you reboot during this period you will probably get an increased connection speed, then when the crosstalk returns, your SNRM will drop to ~3 to 4 dB. Whether your connection remains stable is in the lap of the gods.
This is exactly what happened.
Some lines can manage 3, 4 or 5dB SNRM without G.INP.
It seems your line can't.
ES/hour: 2560
The maximum ES allowed per day is either 1440 or 2880 (depending on the ISP's chosen DLM policy).
You smashed through that.
It make take anything from a few days to a couple weeks for DLM to remove the INP+Interleaving.
If your line is anything like mine (and many others) it won't go back to fastpath (no interleaving) on its own.
I had to manually cap my line to get error figures low enough for DLM to put my line on fastpath.
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Thanks for the advice guys!
The errors seemed to have stabalized now SNR gone back down to 4db again though.
Will have a proper look when I get home from work later
Thanks
Sent from my Pixel 2 XL using Tapatalk
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In my experience you need under 20 ES per day for DLM to remove interleaving.
Even that wasn't enough for my line and I needed single figure ES/day.
You may be best resyncing the line to get it back to 6dB for better stability and to eventually get back the speed lost to interleaving.
It sounds very much like you have a neighbour who turns their modem off for hours at a time.
If your line resyncs during this period then as soon as their modem syncs again your SNRM drops to 4dB.
This has caused the line to be interleaved and will probably prevent interleaving being removed.
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I'm going to do a resync later but hoping my SNR goes back up to 6db before hand as I don't want to lose any more speed
Sent from my Pixel 2 XL using Tapatalk
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Definitely looking better on the ES but not sure I want to do a resync with those SNR values?
I can see my line sync dropping to about 35Mbps,
Stats recorded 25 Sep 2018 17:46:25
DSLAM type / SW version: IFTN:0xd086 (208.134) / v0xd086
Modem/router firmware: AnnexA version - A2pv6F039g1.d24m
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 1 day 14 hours 4 min 48 sec
Resyncs: 0 (since 25 Sep 2018 17:40:21)
Downstream Upstream
Line attenuation (dB): 18.8 0.0
Signal attenuation (dB): Not monitored
Connection speed (kbps): 44026 5889
SNR margin (dB): 4.1 4.8
Power (dBm): 13.5 -0.4
Interleave depth: 861 1
INP: 3.00 0
G.INP: Not enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)
RSCorr/RS (%): 2.7804 0.1242
RSUnCorr/RS (%): 0.0004 0.0000
ES/hour: 0 46.2
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You have 0 ES/hour so looks like 4dB is ok with interleaving.
If you are using DslStats it would be better you post the stats from the Telnet Data > Connection Stats tab.
The stats posted above are missing many details that help us see how your line is performing.
If you are worried about the huge size of the stats you can place them within the [code] tags. It's the # box above the reply box.
It really doesn't matter though :)
edit: tag fail. forgot the nobbc tag
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adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 5429 Kbps, Downstream rate = 47027 Kbps
Bearer: 0, Upstream rate = 5889 Kbps, Downstream rate = 44026 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): 4.1 4.7
Attn(dB): 18.8 0.0
Pwr(dBm): 13.5 -0.4
VDSL2 framing
Bearer 0
MSGc: 18 33
B: 51 184
M: 1 1
T: 64 5
R: 12 16
S: 0.0376 0.9981
L: 13624 1611
D: 861 1
I: 64 201
N: 64 201
Counters
Bearer 0
OHF: 57486600 284202
OHFErr: 216 2040
RS: 1831562660 2229580
RSCorr: 46473476 5071
RSUnCorr: 6325 0
Bearer 0
HEC: 1422 0
OCD: 0 0
LCD: 0 0
Total Cells: 3162092959 0
Data Cells: 177004572 0
Drop Cells: 0
Bit Errors: 0 0
ES: 78342 82899
SES: 86 298
UAS: 64 196510
AS: 138828
Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.41 16.28
OR: 79.51 19.16
AgR: 44105.71 5907.96
Bitswap: 17483/18157 7960/8028
Total time = 2 days 21 hours 41 min 24 sec
FEC: 46473476 5071
CRC: 216 2040
ES: 78342 82899
SES: 86 298
UAS: 64 196510
LOS: 2 0
LOF: 15 0
LOM: 0 0
Latest 15 minutes time = 11 min 24 sec
FEC: 302023 140
CRC: 3 19
ES: 1 19
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 316274 146
CRC: 3 24
ES: 1 22
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 21 hours 41 min 24 sec
FEC: 27265808 1261
CRC: 104 1079
ES: 36 901
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 19207668 3810
CRC: 112 961
ES: 17644 41639
SES: 11 149
UAS: 32 98269
LOS: 1 0
LOF: 7 0
LOM: 0 0
Since Link time = 1 days 14 hours 33 min 47 sec
FEC: 46473476 5071
CRC: 216 2040
ES: 65 42292
SES: 0 149
UAS: 0 98248
LOS: 0 0
LOF: 0 0
LOM: 0 0
>
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Done a manual resync tonight to cap it at 40 down and 5 up SNR looking back to normal see what happens over the next few days,
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 5577 Kbps, Downstream rate = 45479 Kbps
Bearer: 0, Upstream rate = 4996 Kbps, Downstream rate = 39088 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): 6.1 6.4
Attn(dB): 18.9 0.0
Pwr(dBm): 13.5 -9.9
VDSL2 framing
Bearer 0
MSGc: 18 255
B: 51 141
M: 1 1
T: 64 8
R: 12 16
S: 0.0423 0.9020
L: 12096 1428
D: 765 1
I: 64 161
N: 64 161
Counters
Bearer 0
OHF: 355199 59443
OHFErr: 2 19
RS: 90837652 4278956
RSCorr: 470739 18
RSUnCorr: 7 0
Bearer 0
HEC: 25 0
OCD: 0 0
LCD: 0 0
Total Cells: 72613554 0
Data Cells: 614076 0
Drop Cells: 0
Bit Errors: 0 0
ES: 78374 128797
SES: 86 447
UAS: 94 294817
AS: 967
Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.71 16.29
OR: 70.59 128.10
AgR: 39159.03 5124.33
Bitswap: 67/67 98/98
Total time = 3 days 21 hours 22 min 2 sec
FEC: 90613695 10902
CRC: 350 4115
ES: 78374 128797
SES: 86 447
UAS: 94 294817
LOS: 2 0
LOF: 15 0
LOM: 0 0
Latest 15 minutes time = 7 min 2 sec
FEC: 229094 9
CRC: 2 14
ES: 1 12
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 455456 22
CRC: 0 12
ES: 0 44097
SES: 0 149
UAS: 30 98307
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 21 hours 22 min 2 sec
FEC: 39730470 1562
CRC: 126 1800
ES: 30 45642
SES: 0 149
UAS: 30 98307
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 31675557 5530
CRC: 112 1354
ES: 38 1157
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 16 min 5 sec
FEC: 470739 18
CRC: 2 19
ES: 1 44104
SES: 0 149
UAS: 0 98277
LOS: 0 0
LOF: 0 0
LOM: 0 0
>
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lol...
You've capped it at 40Mb but the line is barely reaching 39Mb.
Ignore the max attainable it is exaggerated with interleaving active.
The SNRM is where it should be and where it would have went with a normal resync (no cap).
A 40Mb cap would see the line sync at 39999 but it's only reaching 39088.
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Yes I thought that so give the router a reboot to remove the cap last night and still at 39Mbps.
Hopefully the interleaving will be removed but I'm not banking on it.
Thanks
Sent from my Pixel 2 XL using Tapatalk
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In my experience it probably won't.
You already had 1 ES in the first 16 minute of sync.
Can you post this part of your stats again, either now or in a few hours.
Since Link time = 16 min 5 sec
FEC: 470739 18
CRC: 2 19
ES: 1 44104
SES: 0 149
UAS: 0 98277
LOS: 0 0
LOF: 0 0
LOM: 0 0
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Thanks for your help!
see below,
Since Link time = 12 hours 36 min 9 sec
FEC: 1903148 49525
CRC: 16 16
ES: 6 44730
SES: 0 149
UAS: 0 100206
LOS: 0 0
LOF: 0 0
LOM: 0 0
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That's averaging 12 ES per 24 hours which could work.
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Hi Guys,
Swapped my Billion 8800nl and gone with the old HG612 and HH5 and things seem a bit better error wise.
Uptime over 5 days and no changes by DLM so far.
Do you think interleaving may be removed at some point?
Thanks,
xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 4407 Kbps, Downstream rate = 41448 Kbps
Bearer: 0, Upstream rate = 4786 Kbps, Downstream rate = 43411 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): 3.9 4.3
Attn(dB): 18.3 0.0
Pwr(dBm): 13.6 0.0
VDSL2 framing
Bearer 0
MSGc: 18 34
B: 43 47
M: 1 1
T: 64 21
R: 10 16
S: 0.0322 0.3184
L: 13400 1608
D: 1007 101
I: 54 64
N: 54 64
Counters
Bearer 0
OHF: 227002928 25903
OHFErr: 2049 750
RS: 2278052330 1009809
RSCorr: 16917525 652436
RSUnCorr: 314636 0
Bearer 0
HEC: 81564 0
OCD: 2502 0
LCD: 2502 0
Total Cells: 594272932 0
Data Cells: 910158989 0
Drop Cells: 0
Bit Errors: 0 0
ES: 211 45158
SES: 0 153
UAS: 22 102453
AS: 470195
Bearer 0
INP: 3.00 4.00
INPRein: 0.00 0.00
delay: 8 8
PER: 2.07 16.78
OR: 92.69 19.06
AgR: 43504.13 4805.22
Bitswap: 192559/204467 38299/39197
Total time = 1 days 10 hours 36 min 57 sec
FEC: 16917525 652436
CRC: 2049 750
ES: 211 45158
SES: 0 153
UAS: 22 102453
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 6 min 57 sec
FEC: 8225 609
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: 50786 6425
CRC: 5 4
ES: 2 3
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 10 hours 36 min 57 sec
FEC: 1390284 46988
CRC: 38 20
ES: 8 18
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 2502205 140474
CRC: 1133 233
ES: 48 130
SES: 0 3
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 5 days 10 hours 36 min 35 sec
FEC: 16917525 652436
CRC: 2049 750
ES: 211 45158
SES: 0 153
UAS: 0 102431
LOS: 0 0
LOF: 0 0
LOM: 0 0
#