Improving speed?
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- Improving speed?
Re: Improving speed?
12-09-2014 7:19 PM
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OR engineer gave me a call to inform me of his arrival time and was spot on time +1 point for OR.
He checked my line from the test socket, could see a fault. +1 OR
Up and down the pole, wellies on and in and out the dark wet hole, in and out the cab, +1 OR
Re-made the connections in the 'hole' but still no-go, test instrument indicates a fault still
Router stats appear to show a slightly noiser line now and this possibly confirmed by louder hum during quite line test.
Phone call still causes the router to drop connection.
I couldn't ask more of the OR eng that attended, he gave it his best effort, he thinks the fault could be in the main cable from cab to exchange???
Now waiting to see what response OR give to PN and the next step.
.......tune in soon for the next episode
ATB
SN
Re: Improving speed?
17-09-2014 5:44 PM
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But I need a IP reset (he tried) but download stuck at 1.5Mbs - sooo near but so far.
Note added to ticket, but if and PN staff read this first, could the IP reset be actioned please.
ATB
SN
EDIT: Looks like the current outage is the problem - BT wholesale test shows the IP profile is set at 5.5Mbps
Re: Improving speed?
21-09-2014 1:31 PM
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So, "everything is awesome" from 1.2mbs to 5.1mbps...a big thank you to Anotherone who gave very helpful advice and also Plusnet whos response to the issue was excellent.
Attached are the speed test and also the bits/tone before and after boost which show a significant improvement.
Apparently I was on the old cable which is made from charcole conductors and dinasaur skin for insulation which also goes the long route to the exchange and I've been swapped to the new cable that takes the short route....happy days are here again.
ATB
SN
Re: Improving speed?
09-10-2014 11:28 PM
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Still picking up a lot of RF though Primarily R4, R5 and Talksport by the looks of it. I wonder if your drop-wire is twisted pair or the line is just badly balanced.
What's the SNRM variation like now from day to night? Some stats might be interesting as well.
Re: Improving speed?
10-10-2014 4:28 PM
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Big difference, the engineer said the cable I was on had lots of the pairs that were U/S.
Bits / tone plot shows I'm getting hit by LW and MW radio stations, not sure if I can do anything about that though.
My drop wire was renewed about 3 years ago, I dont know what the spec is other than it's black
SNRM variation is about the same, drops about 0.5 to 0.75 dB
Below is a copy of the stats:-
Router says the connection has been up for 4 days & 4 hrs.
I've tweaked the target SNR so that I sync above the 6Mbps rate. My Ip is now at 6Mbps so a massive improvement on the 1.7 ish I was getting.
ATB
SN
Max: Upstream rate = 1104 Kbps, Downstream rate = 7264 Kbps
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 6848 Kbps
Link Power State: L0
Mode: G.DMT
TPS-TC: ATM Mode
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 4.6 21.0
Attn(dB): 45.0 26.0
Pwr(dBm): 19.8 12.3
G.dmt framing
K: 215(0) 15
R: 8 16
S: 1 8
😧 64 8
Counters
SF: 21357821 21358108
SFErr: 4132 85
RS: 1452331894 181542915
RSCorr: 853821 164
RSUnCorr: 93952 0
HEC: 3566 51
OCD: 142 2
LCD: 0 0
Total Cells: 1568750588 0
Data Cells: 76259887 0
Drop Cells: 41739
Bit Errors: 0 0
ES: 2317 0
SES: 39 0
UAS: 140 140
AS: 363088
INP: 1.14 3.76
PER: 1.75 1.75
delay: 16.00 16.00
OR: 32.00 32.00
Bitswap: 31584 69
Total time = 1 days 21 hours 53 min 25 sec
FEC: 4522749 0
CRC: 7395 0
ES: 2317 0
SES: 39 0
UAS: 140 140
LOS: 2 0
LOF: 18 0
Latest 15 minutes time = 8 min 25 sec
FEC: 582 0
CRC: 2 0
ES: 1 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1032 0
CRC: 3 0
ES: 2 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 21 hours 53 min 25 sec
FEC: 171197 0
CRC: 281 0
ES: 146 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 201566 0
CRC: 797 0
ES: 288 0
SES: 5 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 4 days 4 hours 51 min 27 sec
FEC: 853821 164
CRC: 4132 85
ES: 1155 0
SES: 19 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Re: Improving speed?
12-10-2014 7:53 PM
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ATB
SN
Re: Improving speed?
12-10-2014 8:10 PM
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What might have helped with the RF issue is if the engineer had fitted an RF3 filter. However the vDSL Mk2 plate may also help, I'll check on one aspect and drop you a PM.
Re: Improving speed?
22-10-2014 6:54 PM
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I hope things have been nice and stable, getting the sync speed just above 6816 is perfect for the 6Mbps profile and keeping the errors to a minimum with that profile.
Re: Improving speed?
23-10-2014 7:20 PM
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Time flys !
The connection has been good, 11 days at 6816 and the last 5 days at 7168 with a 6.5mbps profile (world record) and to think I was only getting a sync of about 2000kbps !
I'll investigate the RF3 and I've sent you a PM with photo of the wiring prior to the NTE5.
My latest stats are shown below which may indicate I'm pushing the SNRM a bit too much?
ATB
SN
otal time = 1 days 42 min 18 sec
FEC: 10093305 0
CRC: 11884 0
ES: 4160 0
SES: 58 0
UAS: 153 153
LOS: 3 0
LOF: 27 0
Re: Improving speed?
23-10-2014 8:07 PM
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But yes, looking at those errors, it's pushing it a bit much - whilst the high CRC rate might be considered acceptable, the ES aren't good, but the SES are the real worry, and you've had LOF/LOS errors.
What did you push the Target SNRM down to? With the current speed (if it's still at 7168) and those sort of errors it might cause DLM to act and knock 3dB of the target, and I'd be surprised if the profile hasn't dropped back to 6Mbps, so you aren't gaining anything compared to when you had 6848.
Re: Improving speed?
23-10-2014 9:02 PM
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I've lowered the target by 1.5dB, but the last resync went from 6816 to 7168 (without any intervention from this end) my download test speeds increased from 5.1mbps to 5.4mbps even though the profile was unchanged at 6mbps.
Originally I set the target SNRM to just sneak into to the 6mbps profile - it must have been the DLM that rasied the sync, I was quite happy plodding along at 6816
As there is only a little to gain from the SNR tweak and possibly slowing the actual attained D/L speed due to errors, and worse, anger the DLM gods, I might set it back at 6dB and try that for a while and see if that improves the error rates vs slightly slower download speeds.
ATB
SN
Re: Improving speed?
23-10-2014 9:29 PM
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I doubt DLM kicked you - it won't raise the sync speed, if it were to do anything it would alter the Target SNRM, but being on 20CN, it can't/won't lower it below 6dB itself. It could be that your original 6848 sync you had was after dark and the new sync was during daylight? So it would just be down to the difference in noise levels between daylight and darkness.
If that's not the case, then something is creating some noise periodically that your line is picking up and you ought to see some step changes in SNRM at such times. There's the possibility that it was a spike of interference that triggered the loss of sync.
Re: Improving speed?
23-10-2014 10:00 PM
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That was the strange thing, the 6848 sync was done about mid day when the noise is lowest, so I was surprised when it re-synced at a higer rate (after being at 6848 for 11 days) - must of been at an exact moment when the line was quiet.
ATB SN
Re: Improving speed?
23-10-2014 10:47 PM
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Re: Improving speed?
12-11-2014 6:55 PM
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Looking at my bitswaps - are the counts high or anything to worry about?
Line and link are stable though
I think the swaps start during dark hours.
Stats and graph below.
ATB
SN
adsl: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 1068 Kbps, Downstream rate = 7264 Kbps
Channel: INTR, Upstream rate = 448 Kbps, Downstream rate = 6880 Kbps
Link Power State: L0
Mode: G.DMT
TPS-TC: ATM Mode
Trellis: ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 5.4 20.0
Attn(dB): 44.0 26.0
Pwr(dBm): 19.8 12.3
G.dmt framing
K: 216(0) 15
R: 8 16
S: 1 8
😧 64 8
Counters
SF: 16708149 16708309
SFErr: 641 132
RS: 1136154198 142020626
RSCorr: 248851 457
RSUnCorr: 6430 0
HEC: 474 84
OCD: 0 0
LCD: 0 0
Total Cells: 313695487 0
Data Cells: 102275921 0
Drop Cells: 14901
Bit Errors: 0 0
ES: 324 0
SES: 1 0
UAS: 347 347
AS: 284043
INP: 1.14 3.76
PER: 1.75 1.75
delay: 16.00 16.00
OR: 32.00 32.00
Bitswap: 40447 200
Total time = 1 days 7 hours 6 min 2 sec
FEC: 248851 0
CRC: 641 0
ES: 324 0
SES: 1 0
UAS: 347 347
LOS: 0 0
LOF: 0 0
Latest 15 minutes time = 6 min 2 sec
FEC: 308 0
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1119 0
CRC: 1 0
ES: 1 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Latest 1 day time = 7 hours 6 min 2 sec
FEC: 18322 0
CRC: 35 0
ES: 20 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 60634 0
CRC: 194 0
ES: 74 0
SES: 1 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
Since Link time = 3 days 6 hours 54 min 1 sec
FEC: 248851 457
CRC: 641 132
ES: 324 0
SES: 1 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
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