Sync speed nosedived

Hi all, it looks like my modem re-synced just under 8 hours ago. Sync is now 52101/20000 down from ~77xxx/20000 a couple of weeks ago.

I don't think that it is G.INP as I have a HG612 (unlocked) and firmware is B030SP08. Anyone else seen this?

As it's unlocked, how about posting the xdslcmd info --show output?

I'll post that this evening when I get home from work. I have a --show from before the drop so I'll post that too as a comparison. The BT speedtest tells me nothing is wrong even though my speed is now below the estimate.

I suppose OR think it is perfectly ok to lose one third of my speed in one go.

most likely cause at this point is crosstalk from a new subscriber in your area. But as roberto said paste the stats.

Is a one time loss of 25Mbps likely? There has been a gradual reduction of my attainable rate from around 102Mbps down to 77Mbps. I think that 25Mbps in one re sync is a bit too much.

Here are the stats, first the original stats:

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 32583 Kbps, Downstream rate = 77036 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 77242 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): 6.2 14.1
Attn(dB): 13.7 0.0
Pwr(dBm): 13.1 3.5
VDSL2 framing
Bearer 0
MSGc: -6 -6
B: 243 97
M: 1 1
T: 0 0
R: 10 8
S: 0.1006 0.1554
L: 20201 5457
D: 8 8
I: 254 106
N: 254 106
Q: 8 8
V: 0 2
RxQueue: 60 39
TxQueue: 20 13
G.INP Framing: 18 18
G.INP lookback: 20 13
RRC bits: 24 24
Bearer 1
MSGc: 186 58
B: 0 0
M: 2 2
T: 2 2
R: 16 16
S: 5.3333 16.0000
L: 48 16
D: 3 1
I: 32 32
N: 32 32
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 0
OHFErr: 0 14
RS: 1879557872 1677076
RSCorr: 275329 9092
RSUnCorr: 0 0
Bearer 1
OHF: 43456684 635824
OHFErr: 0 0
RS: 521479471 2711071
RSCorr: 250 170
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 4133 4481
rtx_c: 1964 1582
rtx_uc: 0 81

G.INP Counters
LEFTRS: 13 15
minEFTR: 77230 19997
errFreeBits: 822270774 447853505

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 605937123 0
Data Cells: 614385375 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 3
SES: 0 2
UAS: 53 53
AS: 698040

Bearer 0
INP: 47.00 47.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 0.00
OR: 0.01 0.01
AgR: 77320.70 20102.08

Bearer 1
INP: 4.00 4.00
INPRein: 4.00 4.00
delay: 3 0
PER: 16.06 16.06
OR: 95.62 31.87
AgR: 95.62 31.87

Bitswap: 449622/449623 12914/12946

Total time = 1 days 1 hours 54 min 53 sec
FEC: 275329 9092
CRC: 0 14
ES: 0 3
SES: 0 2
UAS: 53 53
LOS: 0 0
LOF: 0 0
LOM: 0 0
Latest 15 minutes time = 9 min 53 sec
FEC: 192 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: 108 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 = 1 hours 54 min 53 sec
FEC: 1316 70
CRC: 0 0
ES: 0 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: 31012 432
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Since Link time = 8 days 1 hours 53 min 59 sec
FEC: 275329 9092
CRC: 0 14
ES: 0 3
SES: 0 2
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0

And now the current stats:

xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 1
Last initialization procedure status: 0
Max: Upstream rate = 23628 Kbps, Downstream rate = 48660 Kbps
Bearer: 0, Upstream rate = 20000 Kbps, Downstream rate = 52101 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): 5.5 8.0
Attn(dB): 20.9 0.0
Pwr(dBm): 13.2 7.3
VDSL2 framing
Bearer 0
MSGc: -6 -6
B: 235 97
M: 1 1
T: 0 0
R: 12 8
S: 0.1442 0.1554
L: 13763 5457
D: 8 8
I: 248 106
N: 248 106
Q: 8 8
V: 1 2
RxQueue: 42 39
TxQueue: 14 13
G.INP Framing: 18 18
G.INP lookback: 14 13
RRC bits: 24 24
Bearer 1
MSGc: 122 58
B: 0 0
M: 2 2
T: 2 2
R: 16 16
S: 8.0000 16.0000
L: 32 16
D: 1 1
I: 32 32
N: 32 32
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 0
OHFErr: 0 0
RS: 785805632 1675162
RSCorr: 74113 8140
RSUnCorr: 0 0
Bearer 1
OHF: 1770023 728375
OHFErr: 0 0
RS: 14159688 2812837
RSCorr: 1 184
RSUnCorr: 0 0

Retransmit Counters
rtx_tx: 45115 46696
rtx_c: 28421 27171
rtx_uc: 630192 2860

G.INP Counters
LEFTRS: 741 595
minEFTR: 52097 19997
errFreeBits: 2000482348 981012876

Bearer 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 2848560928 0
Data Cells: 16871424 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: 184 42
SES: 142 6
UAS: 398 257
AS: 28432

Bearer 0
INP: 47.00 47.00
INPRein: 0.00 0.00
delay: 0 0
PER: 0.00 0.00
OR: 0.01 0.01
AgR: 52184.34 20102.08

Bearer 1
INP: 2.00 4.00
INPRein: 2.00 4.00
delay: 0 0
PER: 16.06 16.06
OR: 63.75 31.87
AgR: 63.75 31.87

Bitswap: 22291/22292 2328/2333

Total time = 1 days 7 hours 36 min 13 sec
FEC: 4311262 307257
CRC: 8346 139
ES: 184 42
SES: 142 6
UAS: 398 257
LOS: 7 0
LOF: 65 0
LOM: 10 0
Latest 15 minutes time = 6 min 13 sec
FEC: 434 33
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: 674 880
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 = 7 hours 36 min 13 sec
FEC: 69101 8005
CRC: 0 0
ES: 0 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: 351401 32119
CRC: 2322 0
ES: 40 0
SES: 40 0
UAS: 114 74
LOS: 2 0
LOF: 18 0
LOM: 2 0
Since Link time = 7 hours 53 min 51 sec
FEC: 74113 8140
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0

I have tried a quiet line test and it is not completely silent, I can hear a faint buzzing and the occasional click. (corded phone, in phone socket of bt plate, not test socket). I have just noticed that my attenuation seems to have changed to 20.9 from 13.7

I had a drop of 20-25Mb in one go after a long period of gradual loss of db that kept me above 80/20 now stuck at 57/19. Not got GINP or Vectoring yet.

In reply to a post by think26872:

I had a drop of 20-25Mb in one go after a long period of gradual loss of db that kept me above 80/20 now stuck at 57/19. Not got GINP or Vectoring yet.

I wonder if your cabinet has GINP and your modem doesn't have the right firmware?

In reply to a post by jchamier:

In reply to a post by think26872:

I had a drop of 20-25Mb in one go after a long period of gradual loss of db that kept me above 80/20 now stuck at 57/19. Not got GINP or Vectoring yet.

I wonder if your cabinet has GINP and your modem doesn't have the right firmware?

No it is ECI cabinet and no GINP according to stats.

yes with a heavy disturber, I had 2 of them.

In reply to a post by TheHorseman:

Here are the stats, first the original stats:

Text
1	Attn(dB):        13.7            0.0

And now the current stats:

Text
1	Attn(dB):        20.9            0.0

I have tried a quiet line test and it is not completely silent, I can hear a faint buzzing and the occasional click. (corded phone, in phone socket of bt plate, not test socket). I have just noticed that my attenuation seems to have changed to 20.9 from 13.7

There's your answer. There's been a dramatic deterioration in the propagation characteristics of your line. You have a line fault in other words; whether a fault in your internal wiring, or more likely on BT's external plant. Quite often, it's a failing, high-resistance joint at the distribution point, where the twisted pair is most vulnerable to the weather and corrosion.

The aggregate attenuation of all your downstream subcarriers has increased by 7.2dB from 13.7dB to 20.9dB. If we take the anti-log of 7.2dB, we can quantify the power loss in more intuitive terms..

7.2dB = 10.log₁₀y = 10^0.72 = 5.25 ; and where 5.25^-1 = 0.19

This tells us that the line fault has reduced your signal power to just 19% of what it was. With that signal degradation, it's perhaps surprising that your sync speed isn't much worse.

--
.

Edited by deleted (Thu 23-Apr-15 01:08:56)

Yes you are right, I've not thought about it too hard as I have recently had a medical problem diagnosed and that has taken priority. (Still have to have an MRI scan though).

I have reported it as a fault to Plusnet via the member centre.

In reply to a post by TheHorseman:

Yes you are right, I've not thought about it too hard as I have recently had a medical problem diagnosed and that has taken priority. (Still have to have an MRI scan though).

Sorry to hear about your "medical problem". Between these four wall's is it a gentleman's problem? If so, my sympathy's. My jelly bean (as the wife call's it) got caught in the crimp's while doing a dropwire re-fix. It turned a violent purple, swelling to five time's its (flacid) size. Tell me to mind my own, but what colour and size is your jelly bean?

Glad to hear your booked in for an MIR/CAT scan though. Could be a long wait for that scan while the Tory's are clinging to power. That's why we're voting Labour. Only Labour will get the N.H.S. back on it's feet. Labour, the only party fit for government. The only party that can deliver fibre to every home. Accept no less!

Really? How do you jump from TheHorseman's post to "a gentlemen's problem". I believe you just wildly over shared and we really didn't need to know that in a broadband forum. Maybe the Park would be a better place for that discussion (or possibly not).

Hahahahahahahahahahaha

In reply to a post by edwincluck:

The only party that can deliver fibre to every home. Accept no less!

Most supermarkets will deliver fibre to your home.

No, the local doctor thought I might be in the early stages of Parkinson's, however a neurologist has said that it is not and it turns out that I have "essential tremor". There is still no cure but it can be treated by various drugs.

On the broadband problem, still waiting for Plusnet to get back to me.

In reply to a post by TheHorseman:

however a neurologist has said that it is not and it turns out that I have "essential tremor".

Wow, according to NHS Choices, 4% of adults over 40 suffer from this and I hadn't even heard of it (and I'm well over 40).

Yes, I've seen that myself, I also read the page on Parkinson's disease, since that was what the doctor thought I may have.It started to affect me early last year when I was 55. So I will soon have another tablet to add to the collection. At this rate I'll rattle when I walk .