g.inp turned off on line, plus sync speed is progressively getting slower over time.
Instead of resurrecting a previous post, I'll link to it here:
https://community.plus.net/t5/Fibre-Broadband/Sync-speed-dropped-14th-December-with-no-real-reason-a...
I'm still seeing a progressive slowdown of my connection, latest now seems that g.inp has been disabled again on my line, LSYMB and INTLVBLOCK have also gone through the rough again, yet I've no idea as to why or what is causing this to occur. There doesn't seem to be a massive number of CRC errors which I can see, nothing has changed with any equipment my side, everything is still connected the same, has not been moved about, nothing added or removed either, so I'm a bit puzzled why the speeds are dropping as they are.
Current speeds now is a sync of 49mpbs, with attainable sync being anywhere between 52 and 57mbps, SNR has also increased from Dec/January and is now averaging around 7/8dB.
I know previously, when this was happening, there was a line fault where the line comes into the property, and that the jelly connectors were all corroding. Once they were changed, this helped to massively reduce CRC's on the line, and also brought my sync speeds right back up, but just to me feels crazy if this may be the cause again and it's a bit of a waste calling an engineer perhaps to just terminate the connection coming into my house again.
I've added the modem stats again though, but wondering if anything can be seen on the line which may give an indication?
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 48999000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 55443464 bps US Attainable Rate : 20616000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 17 dB Cur SNR Margin : 7 dB
DS actual PSD : 7. 3 dB US actual PSD : 12. 8 dB
NE CRC Count : 17 FE CRC Count : 15080
NE ES Count : 5 FE ES Count : 13737
Xdsl Reset Times : 0 Xdsl Link Times : 1
ITU Version[0] : fe004452 ITU Version[1] : 41590000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 21 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004244 CO ITU Version[1] : 434da49a
DSLAM CHIPSET VENDOR : < BDCM >
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 1 1
ReTxEnable : 0 1
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 0 0
LOF : 0 0
LPR : 0 0
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 0 565695 (seconds)
ES : 5 13737 (seconds)
SES : 0 3 (seconds)
LOSS : 0 0 (seconds)
UAS : 31 8495 (seconds)
HECError : 0 0
CRC : 17 15080
RsCorrection : 0 0
INP : 0 215 (symbols)
InterleaveDelay : 0 13 (1/100 ms)
NFEC : 254 32
RFEC : 16 16
LSYMB : 5373 16
INTLVBLOCK : 127 32
AELEM : 0 ----Cheers!
From what I can see, this all started to happen around April, as there is a 10mbps speed drop around that time, with an increase in SNR from around 5dB to 8dB
Hi @ErTnEc - I've run some tests on the line this morning. I thought I'd add the results here.
| GEA Test Detail | |||
| Circuit ID | NA | Service ID | |
| Test Outcome | Pass | ||||
| Test Outcome Code | GTC_FTTC_SERVICE_0000 | ||||
| Description | GEA service test completed and no fault found . | ||||
| Main Fault Location | OK | ||||
| Sync Status | In Sync | ||||
| Downstream Speed | 48.9 Mbps | ||||
| Upstream Speed | 20.0 Mbps | ||||
| Appointment Required | N | ||||
| Fault Report Advised | N | ||||
| NTE Power Status | PowerOn | ||||
| Voice Line Test Result | Pass | ||||
| Radio Frequency Ingress | Not Detected | ||||
| Repetitive Electrical Impulse Noise | Not Detected | ||||
| Cross Talk | Not Detected | ||||
| Estimated Line Length In Metres | 554.0 | ||||
| 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 | ||||
| Current 15Min Bin Retrains | 0 | ||||
| Last 15Min Bin Retrains | 0 | ||||
| DP Type | External | ||||
| Profile Name | 0.128M-49M Downstream, Retransmission Low - 0.128M-20M Upstream, Error Protection Off | ||||
| Time Stamp | 2020-09-04T11:15:00 | ||||
| Parameters | MIN | MAX | AVG |
| Down Stream Line Rate | 48.9 Mbps | 48.9 Mbps | 48.9 Mbps |
| Up Stream Line Rate | 20.0 Mbps | 20.0 Mbps | 20.0 Mbps |
| Up Time | 2.0 Sec | 900.0 Sec | 893.3 Sec |
| Retrains | 0.0 | 1.0 | 0.0 |
| Current and Last 15 Minute Bin Performance | ||
| Parameters | Last Traffic Count(Upto 15 mins) | Current Traffic Count(Upto 15 mins) |
| Start Time Stamp | 2020-09-17T09:41:23Z | 2020-09-17T09:56:23Z |
| Ingress Code Violation | 1 | 1 |
| Egress Code Violation | 0 | 0 |
| Errored Seconds | 0 | 0 |
| Severely Errored Seconds | 0 | 0 |
| Unavailable Seconds | 0 | 0 |
The profile is banded as you've mentioned, the router logs also backed that up with the current data rate stats it provided. I've arranged for the line to be reset as it's achieving the max sync rate the profile is capped to. Normally this takes a working day to go through, but this might be slightly longer given the weekend is approaching.
I've updated the open fault ticket here so this can be followed up: https://www.plus.net/wizard/?p=view_question&id=205883069
Hi @WillF thanks for looking into that. The line does appear to have had the reset applied on Friday just before 11:30, there were 4 LOS events according to my modem, and once it came back it's been syncing straight at 58mbps solid since:
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Running Mode : 17A State : SHOWTIME
DS Actual Rate : 58887000 bps US Actual Rate : 20000000 bps
DS Attainable Rate : 58035428 bps US Attainable Rate : 20680000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 17 dB Cur SNR Margin : 5 dB
DS actual PSD : 7. 3 dB US actual PSD : 12. 8 dB
NE CRC Count : 12 FE CRC Count : 15944
NE ES Count : 6 FE ES Count : 14501
Xdsl Reset Times : 0 Xdsl Link Times : 3
ITU Version[0] : fe004452 ITU Version[1] : 41590000
VDSL Firmware Version : 05-07-06-0D-01-07 [with Vectoring support]
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 21 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004244 CO ITU Version[1] : 434da49a
DSLAM CHIPSET VENDOR : < BDCM >
---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
Near End Far End Note
Trellis : 1 1
Bitswap : 1 1
ReTxEnable : 0 1
VirtualNoise : 0 0
20BitSupport : 0 0
LatencyPath : 0 0
LOS : 4 4
LOF : 0 0
LPR : 0 4
LOM : 0 0
SosSuccess : 0 0
NCD : 0 0
LCD : 0 0
FECS : 0 570205 (seconds)
ES : 6 14501 (seconds)
SES : 0 3 (seconds)
LOSS : 0 0 (seconds)
UAS : 30 8630 (seconds)
HECError : 0 0
CRC : 12 15944
RsCorrection : 0 0
INP : 0 220 (symbols)
InterleaveDelay : 0 24 (1/100 ms)
NFEC : 254 32
RFEC : 16 16
LSYMB : 5373 16
INTLVBLOCK : 127 32
AELEM : 0 ----
It does appear that g.inp is still off on the line though, and since Friday I've only recorded 12 CRC errors (as listed above), as well as 6 NE ES, so does seem to be fairly stable.
However, speeds still appear to not be as fast as I'm now syncing, and checking it does say on the btwholesale speedtest site that my IP Profile is set to 47.37Mbps. Will it take a bit longer for the IP Profile to update & match the current sync speeds?
Cheers
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