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Author Topic: Speed increase after Openreach visit  (Read 787 times)

Shakermaker

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  • Posts: 30
Speed increase after Openreach visit
« on: June 28, 2020, 09:33:02 AM »

Hi all  :)

I have had some issues with my line recently snr randomly dropping to 1db etc causing my router to drop sync.

Anyway had Openreach out and they said they found a fault and went off to fix and has luck would have it about half hour later my router comes back up and syncing 7mbps higher on the download 4mbps higher on the upload previously my sync speed was 44mbps down and 5mbps up and now syncing at 51mbps down and 9mbps up so course I'm happy...........but,

He did'nt tell me what he had done nor did he do a DLM reset after which I think would've benefitted even more and was wondering if there's anything I can do to force DLM into giving me a bit more?

Current stat's attached.

Thanks,

Code: [Select]
Connection stats
adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 9269 Kbps, Downstream rate = 51901 Kbps
Bearer: 0, Upstream rate = 9269 Kbps, Downstream rate = 51235 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             6.1
Attn(dB):        20.0            0.0
Pwr(dBm):        13.1            6.6

                        VDSL2 framing
                        Bearer 0
MSGc:           -6              -6
B:              235             227
M:              1               1
T:              0               0
R:              12              16
S:              0.1466          0.7824
L:              13534           2495
D:              8               4
I:              248             244
N:              248             244
Q:              8               4
V:              1               0
RxQueue:                42              15
TxQueue:                14              5
G.INP Framing:          18              18
G.INP lookback:         14              5
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               2
RS:             1955337688              2746546
RSCorr:         1364906         10097
RSUnCorr:       0               0
                        Bearer 1
OHF:            4478817         302697
OHFErr:         0               11
RS:             35830038                808137
RSCorr:         1474            203
RSUnCorr:       0               0

                        Retransmit Counters
rtx_tx:         192666223               832
rtx_c:          5761            222244
rtx_uc:         0               610983

                        G.INP Counters
LEFTRS:         34              7395
minEFTR:        51238           9266
errFreeBits:    56185637                1048122258

                        Bearer 0
HEC:            0               0
OCD:            0               0
LCD:            0               0
Total Cells:    2793055695              0
Data Cells:     221235972               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               1
SES:            0               0
UAS:            32              32
AS:             71951

                        Bearer 0
INP:            48.00           43.00
INPRein:        0.00            0.00
delay:          0               0
PER:            0.00            0.00
OR:             0.01            0.01
AgR:            51316.06        9289.28

                        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:        17803/17803             4553/4558

Total time = 19 hours 59 min 45 sec
FEC:            1364906         10097
CRC:            0               2
ES:             0               1
SES:            0               0
UAS:            32              32
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 15 minutes time = 14 min 45 sec
FEC:            5309            16
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:            5146            2
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 = 19 hours 59 min 45 sec
FEC:            1364906         10097
CRC:            0               2
ES:             0               1
SES:            0               0
UAS:            32              32
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 = 19 hours 59 min 12 sec
FEC:            1364906         10097
CRC:            0               2
ES:             0               1
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
 >

[Moderator edited to remove one erroneous and broken [/code] tag.]
« Last Edit: June 28, 2020, 04:51:41 PM by burakkucat »
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RealAleMadrid

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Re: Speed increase after Openreach visit
« Reply #1 on: June 28, 2020, 10:20:42 AM »

I don't think a DLM reset would give any benefit. Your line is not banded, the SNRM is at 3dB and you have G.INP with retransmission low enabled on downstream and upstream (which is unusual and may not last).

So I would say that's the best you are going to get. ;D
« Last Edit: June 28, 2020, 10:27:51 AM by RealAleMadrid »
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tiffy

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Re: Speed increase after Openreach visit
« Reply #2 on: June 28, 2020, 11:25:07 AM »

At 20dB DS attenuation you are not exactly on the shortest of lines to your FTTC cabinet, as RealAleMadrid has said, 51 Mbps DS synch with 3.3dB DS SNRN is very likely the best your line is capable of, the 5 to 9 Mbps US synch improvement is certainly a good result.

Would think that your US G.Inp (Re-Tx) will disappear very shortly, currently DLM does not appear to leave this active for very long as soon as the ES rate decreases, would expect DS G.Inp to remain active.

Overall I think you have had a positive result, VDSL-2 FTTC service unfortunately does not generally improve with time regardng synch speeds, cross-talk being the biggest factor as more subscribers are added to the local FTTC cabinet.

You have not really mentioned what your synch speeds were before the fault developed ?
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Shakermaker

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Re: Speed increase after Openreach visit
« Reply #3 on: June 28, 2020, 11:37:20 AM »

Thanks for the replies  :)

My line has always synced around the 44mbps mark so I think the fault has always been there.

Looks like whatever it was got considerably worse recently just frustrates me when openreach don't tell you what they've done after the fix and I thought it was standard practice for them to do a DLM reset after fixing a fault.

It would've been interesting to see how the line behaves for the next 10 days or so after a reset watching G.IMP being enabled again and the reduction to the target 3db snr.

But nevermind thanks again  :)
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tiffy

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Re: Speed increase after Openreach visit
« Reply #4 on: June 28, 2020, 01:25:23 PM »

Quote
openreach don't tell you what they've done after the fix
Yes, depends very much on the "engineer" who attends, some are very communicative but sadly some are not and treat customers like morons who couldn't possibly understand their systems.
The better ISP's such as A&A can provide customer access to the OR engineers report I believe, no personal experience on that.

Enjoy your speed boost and don't become too fixated with the stat's as long as your connection is stable it can become addictive, I can vouch for that !
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j0hn

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Re: Speed increase after Openreach visit
« Reply #5 on: June 28, 2020, 02:37:28 PM »

You REALLY didn't want a DLM reset.

A DLM reset is good because it wipes the lines history and starts from scratch, meaning a line is more likely to go on the optimum profile.

You are on the optimum profile, in every way.
DLM can't push any more sync out the line. You're fortunate he didn't reset it.

As above for your attenuation (line length is likely over 800m) that's a great sync.
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Alex Atkin UK

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Re: Speed increase after Openreach visit
« Reply #6 on: June 29, 2020, 10:21:17 AM »

Yes, depends very much on the "engineer" who attends, some are very communicative but sadly some are not and treat customers like morons who couldn't possibly understand their systems.
The better ISP's such as A&A can provide customer access to the OR engineers report I believe, no personal experience on that.

Enjoy your speed boost and don't become too fixated with the stat's as long as your connection is stable it can become addictive, I can vouch for that !

To be fair, 99% of customers likely ARE morons.  ::)
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roseway

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Re: Speed increase after Openreach visit
« Reply #7 on: June 29, 2020, 11:19:17 AM »

>>> To be fair, 99% of customers likely ARE morons.

That's a bit harsh, don't you think? :oldman:
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tiffy

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Re: Speed increase after Openreach visit
« Reply #8 on: June 29, 2020, 11:20:25 AM »

Quote
To be fair, 99% of customers likely ARE morons.

A wee bit harsh perhaps but probably close to factual.
However, with information sites like this so easily accessable it's surprising how well informed the public can be at times.

The other side of the coin being a little knowledge can be a dangerous thing, dealing with "joe public" is never easy and I'am sure OR engineers will experience many instances of customers telling them what's wrong and suggesting how they should fix it, must become very annoying and who could blame them for just "switching off" in the end.

My dad was a TV "engineer" back in the B&W, thermionic valve days, people used to come into his workshop and ask for a "picture valve" or a "sound valve" to repair their faulty appliances, usually got quite annoyed when informed that it was not that simple.
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