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Standard User djay
(committed) Fri 08-Sep-17 11:09:46
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Major speed increase 55mb to 79mbit


[link to this post]
 
Ok long story as short as possible ..

I have been with plusnet for around three years now on there fttc 80mbit service, when we first joined we were estimated around 70mbit but upon connection at 6db we received 56mbit and 20mbit up.

We complained and had numerous engineer visits due to speed slowing to 20-30mbit even though in sync at 56.

After all the visit's we were still at 56meg no change at all and were told by at least 4 different bto engineers that this was the max the line was capable off.

Roll on until this year when around march g.inp was enabled on our line and the snr dropped slowly from 6db to 3db increasing the sync to 65mbit, obviously we were happy it had increased although we were still getting random slow throughput on bto tap1 tests etc so more engineers came out.

And around july-aug this year we had an engineer at the house for 2 full days checking the pairs in the cabinet and making sure everything was as good as possible up the telegraph poles etc etc.

This ended up with them loading the port with 500m of cable to see if what we were getting was right or if the port was faulty. After testing they found the port was not performing right and so a lift and shift was done (after many dlm resets i may add).

This made no difference and we were told the line is error free and there was nothing more they could do.

My line had now crept up to 72mbit sync by now from the 56 original one yet nothing had been changed apart from the lift and shift and that made no difference at the time it was done.

My line is roughly 415 meter from the green cabinet which is a huwaei and i use an hg612 unlocked as my modem and the plusnet hub1 as my router for wifi

Now this mon day i checked dsl stats and my snr for downstream had gone up from 3.3 to 5.5 yet same 72mbit sync so i restarted my router and when it came back up my line was in sync at 79997 with a max of 80700, my upstream was 19999 and the max had gone up from 22mbit to 24246 ?!?

My latency has increased around 8ms from 13-15 to 20-22 but all my stats look the same as they did before the speed increase.

G.inp still on the download as before and nothing on the upstream. So what's changed as no work has been done on this 56mbit max connection we joined with, and plusnet say nothing there side has changed.

The customer relations person i deal with who overseen my account with all these problems has asked bto if any work has been done local to me and the answer was no.

Sorry for the long long winded post but here are some stats before and after as i would love to know what changed if anyone has any idea


Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0003
Description No problem found, OAM test is not currently supported on this line.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 57.0 Mbps
Upstream Speed 20.0 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Not Detected
Estimated Line Length In Metres 425.0
Upstream Rate Assessment Very Good
Downstream Rate Assessment Reasonable
Interference Pattern Not Detected
Service Impact No Impact Observed
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Technology VDSL
Profile Name 0.128M-80M Downstream, Error Protection Off - 0.128M-20M Upstream, Error Protection Off
Time Stamp 2017-07-14T13:00:00

Eng notes:
80meg at the cabinet but getting 50meg sync speed, advised Paul he will need to test back at the cabinet confirm 80meg sync, put a load on the port prove port not faulty, if port OK then he needs to work down the line to make improvements e.g. improve D side etc. Advised Paul 2/3rds of sync speed with an ethernet cable.

cse Paul cse has retained this task from yesterday previous notes state slow speed issue cse to break down d side to locate any issues says faults located on the port so agreed to try another port Tried next spare port 0/0/36 D/e338 confirmed sync and d/tone. Lift and shift requested


Featured Products


Downstream Line Rate(Mbps)


Upstream Line Rate(Mbps)


Downstream Handback Threshold(Mbps)


WBC FTTC Availability Date


WBC SOGEA Availability Date


WBC FTTC 18x2 Provide Availability


WBC FTTC 18x2 Sim Availability


Left in Jumper

High Low High Low



VDSL Range A (Clean) 79.3 58.8 20 20 52.4 Available -- -- Yes --


Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0003
Description No problem found, OAM test is not currently supported on this line.
Main Fault Location OK
Sync Status In Sync
Downstream Speed 62.3 Mbps
Upstream Speed 20.0 Mbps
Appointment Required N
Fault Report Advised N
NTE Power Status PowerOn
Voice Line Test Result Pass
Bridge Tap Not Detected
Radio Frequency Ingress Not Detected
Repetitive Electrical Impulse Noise Not Detected
Cross Talk Not Detected
Estimated Line Length In Metres 410.7
Upstream Rate Assessment Very Good
Downstream Rate Assessment Reasonable
Interference Pattern Not Detected
Service Impact No Impact Observed
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Technology VDSL
Current 15Min Bin Retrains 0
Last 15Min Bin Retrains 0
Profile Name 0.128M-80M Downstream, Error Protection Off - 0.128M-20M Upstream, Error Protection Off
Time Stamp 2017-07-14T13:00:00
Parameters MIN MAX AVG
Down Stream Line Rate 57.0 Mbps 63.0 Mbps 59.8 Mbps
Up Stream Line Rate 19.9 Mbps 19.9 Mbps 19.9 Mbps
Up Time 860.0 Sec 900.0 Sec 899.7 Sec
Retrains 0.0 1.0 0.0

Line showing 72mbit sync stats from dslstats

Stats recorded 30 Jul 2017 15:42:38

DSLAM/MSAN type: BDCM:0xa48c / v0xa48c
Modem/router firmware: AnnexA version - A2pv6C038m.d24j
DSL mode: VDSL2 Profile 17a
Status: Showtime
Uptime: 51 min 29 sec
Resyncs: 1 (since 30 Jul 2017 12:36:35)

Downstream Upstream
Line attenuation (dB): 15.3 0.0
Signal attenuation (dB): Not available on VDSL2
Connection speed (kbps): 72443 19999
SNR margin (dB): 3.4 15.1
Power (dBm): 14.0 6.7
Interleave depth: 8 1
INP: 50.00 0
G.INP: Enabled Not enabled
Vectoring status: 5 (VECT_UNCONFIGURED)

RSCorr/RS (%): 0.0001 0.0002
RSUnCorr/RS (%): 0.0000 0.0000
ES/hour: 0 0

Full Line Stats are as follows

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 23398 Kbps, Downstream rate = 72144 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 72443 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): 3.4 15.1
Attn(dB): 15.3 0.0
Pwr(dBm): 14.0 6.7
VDSL2 framing
Bearer 0
MSGc: -6 26
B: 243 237
M: 1 1
T: 0 42
R: 10 16
S: 0.1073 0.3781
L: 18946 5374
D: 8 1
I: 254 127
N: 254 254
Q: 8 0
V: 0 0
RxQueue: 80 0
TxQueue: 20 0
G.INP Framing: 18 0
G.INP lookback: 20 0
RRC bits: 0 24
Bearer 1
MSGc: 154 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 6.4000 0.0000
L: 40 0
D: 3 0
I: 32 0
N: 32 0
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 808578
OHFErr: 0 4
RS: 119214856 3880506
RSCorr: 132 5
RSUnCorr: 0 0
Bearer 1
OHF: 199844 0
OHFErr: 0 0
RS: 1997821 0
RSCorr: 0 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 9706 0
rtx_c: 7660 0
rtx_uc: 120838 0

G.INP Counters
LEFTRS: 36 0
minEFTR: 72425 0
errFreeBits: 2241773155 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 447158937 0
Data Cells: 7126474 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: 31 1221
SES: 30 0
UAS: 173 143
AS: 3211

Bearer 0
INP: 50.00 0.00
INPRein: 1.00 0.00
delay: 0 0
PER: 0.00 3.98
OR: 0.01 64.22
AgR: 72517.10 20063.54

Bearer 1
INP: 4.50 0.00
INPRein: 4.50 0.00
delay: 3 0
PER: 16.06 0.01
OR: 79.68 0.01
AgR: 79.68 0.01

Bitswap: 272/272 12/12

Total time = 1 days 8 hours 37 min 17 sec
FEC: 85874 5835
CRC: 1665 1425
ES: 31 1221
SES: 30 0
UAS: 173 143
LOS: 3 0
LOF: 27 0
LOM: 0 0
Latest 15 minutes time = 7 min 17 sec
FEC: 2 1
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: 48 3
CRC: 0 2
ES: 0 2
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 1 day time = 8 hours 37 min 17 sec
FEC: 9351 229
CRC: 536 41
ES: 10 41
SES: 10 0
UAS: 40 30
LOS: 1 0
LOF: 9 0
LOM: 0 0
Previous 1 day time = 24 hours 0 sec
FEC: 11144 559
CRC: 0 136
ES: 0 120
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 53 min 29 sec
FEC: 132 5
CRC: 0 4
ES: 0 4
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0

My line stats today at max sync so whats changed ???

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 24246 Kbps, Downstream rate = 80700 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 79997 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): 3.3 15.2
Attn(dB): 15.3 0.0
Pwr(dBm): 14.0 6.7
VDSL2 framing
Bearer 0
MSGc: -6 26
B: 178 237
M: 1 1
T: 0 42
R: 8 16
S: 0.0712 0.3781
L: 21004 5374
D: 8 1
I: 187 127
N: 187 254
Q: 8 0
V: 0 0
RxQueue: 124 0
TxQueue: 31 0
G.INP Framing: 18 0
G.INP lookback: 31 0
RRC bits: 0 24
Bearer 1
MSGc: 186 -6
B: 0 0
M: 2 0
T: 2 0
R: 16 0
S: 5.3333 0.0000
L: 48 0
D: 3 0
I: 32 0
N: 32 0
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 3558958
OHFErr: 0 74
RS: 2667254072 1837817
RSCorr: 1801 351
RSUnCorr: 0 0
Bearer 1
OHF: 2968404 0
OHFErr: 0 0
RS: 35620109 0
RSCorr: 19 0
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 999782 0
rtx_c: 303 0
rtx_uc: 0 0

G.INP Counters
LEFTRS: 0 0
minEFTR: 79982 0
errFreeBits: 58169584 0

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 3040089727 0
Data Cells: 53400369 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 58
SES: 0 0
UAS: 29 29
AS: 47680

Bearer 0
INP: 52.00 0.00
INPRein: 1.00 0.00
delay: 0 0
PER: 0.00 3.98
OR: 0.01 64.22
AgR: 80108.80 20063.54

Bearer 1
INP: 4.00 0.00
INPRein: 4.00 0.00
delay: 3 0
PER: 16.06 0.01
OR: 95.62 0.01
AgR: 95.62 0.01

Bitswap: 18496/18496 36/36

Total time = 13 hours 15 min 9 sec
FEC: 1801 351
CRC: 0 74
ES: 0 58
SES: 0 0
UAS: 29 29
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 9 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: 25 1
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 15 min 9 sec
FEC: 1801 351
CRC: 0 74
ES: 0 58
SES: 0 0
UAS: 29 29
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 14 min 39 sec
FEC: 1801 351
CRC: 0 74
ES: 0 58
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0


Totally confused and again sorry from the stupid long (hardly short winded) post !
Standard User lee111s
(fountain of knowledge) Fri 08-Sep-17 11:32:26
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Re: Major speed increase 55mb to 79mbit


[re: djay] [link to this post]
 
Could be something as simple as a crosstalker has ceased their service.
Standard User AndyPandy
(fountain of knowledge) Fri 08-Sep-17 16:14:10
Print Post

Re: Major speed increase 55mb to 79mbit


[re: djay] [link to this post]
 
It's the shift from SNR target of 6db down to 3db. (Yours is at 3.4db downstream) the OR rolled out.

My connection went from ~63 to ~79. It re-syncs most days now though, not that I'm complaining.


ZeN Unlimited Fibre 2
Fritz!Box 3390


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Standard User WilliamGrimsley
(experienced) Fri 08-Sep-17 16:17:18
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Re: Major speed increase 55mb to 79mbit


[re: AndyPandy] [link to this post]
 
It shouldn't be resyncing most days, though. My line remained in sync for over 20 days on a 3dB DS SNRM and that was with the BT "not-so" Smart Hub!

William Grimsley.
Standard User AndyPandy
(fountain of knowledge) Fri 08-Sep-17 16:21:51
Print Post

Re: Major speed increase 55mb to 79mbit


[re: WilliamGrimsley] [link to this post]
 
In reply to a post by WilliamGrimsley:
It shouldn't be resyncing most days, though. My line remained in sync for over 20 days on a 3dB DS SNRM and that was with the BT "not-so" Smart Hub!


Mine certainly is. Best it's managed is 2 days so far. I'm using a Fritzbox though. I guess the line isn't very stable at 3db (it would stay up for weeks at a time on 6db - usually until I rebooted it for some other reason).

Once a day shouldn't upset DLM too much though I hope, as I'm enjoying the extra speed.

Now if only they'd liven up the G.Fast box on my cabinet so I can see if I'm close enough to benefit!


ZeN Unlimited Fibre 2
Fritz!Box 3390
Standard User WilliamGrimsley
(experienced) Fri 08-Sep-17 16:30:08
Print Post

Re: Major speed increase 55mb to 79mbit


[re: AndyPandy] [link to this post]
 
Yeah, I find DLM can be quite erratic with the lower DS SNRM's. But, seen as we don't seem to have any clue on what its thresholds are, we just have to watch with interest. LOL.

Yes, I'm interested in the G.fast rollout, but seen as my line is circa 900 m long from the cabinet, I highly doubt I'll be able to get a service unless Openreach attach a node to a telegraph pole close enough.

William Grimsley.

Edited by WilliamGrimsley (Fri 08-Sep-17 16:33:15)

Administrator MrSaffron
(staff) Fri 08-Sep-17 16:35:54
Print Post

Re: Major speed increase 55mb to 79mbit


[re: WilliamGrimsley] [link to this post]
 
900m means zero benefit from a G.fast pod

The author of the above post is a thinkbroadband staff member. It may not constitute an official statement on behalf of thinkbroadband.
Standard User WilliamGrimsley
(experienced) Fri 08-Sep-17 16:39:47
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Re: Major speed increase 55mb to 79mbit


[re: MrSaffron] [link to this post]
 
Yeah, thought so. What a shame. Oh well, we don't need the bandwidth.

William Grimsley.
Standard User tomse43
(learned) Fri 08-Sep-17 16:57:48
Print Post

Re: Major speed increase 55mb to 79mbit


[re: WilliamGrimsley] [link to this post]
 
In reply to a post by WilliamGrimsley:
Yeah, thought so. What a shame. Oh well, we don't need the bandwidth.


What speeds do you currently get? And prior to the 3dB change?
Standard User WilliamGrimsley
(experienced) Fri 08-Sep-17 17:11:19
Print Post

Re: Major speed increase 55mb to 79mbit


[re: tomse43] [link to this post]
 
43.8 Mb on 4 dB. Have had 48.x on 3 dB.

William Grimsley.
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