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Aspiring Contributor
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Message 1 of 26

Re: My Infinity 2 connection and noise margin

Hi Craig_UK and others,

 

Just to let you know, since I got my Unlocked HG612 3B modem on connected to my Acher VR900, things seem a bit better....I now have a very stable 54 Mbps connection and SNR varies between 7.1-7.8 (the max downstream speed values varies betweeen 56-59 Mbps). I changed over to this configuration 36 hours ago now, so I will keep it going for the next weeks and hope that there is some marginal improvement in speed back up to to 59-60 Mbps download speed I used to enjoy. I am not sure I will ever get there now, but now because my speed is overy 50 Mbps, they won't get an engineer round as I am within the "excpected/accepted speed range" for my line.

 

But, just wanted to to let you know I am happier with using the HG612 modem and seperate router - it gives me a lot more freedom to bounce the wireless router if I want, but ensure I keep the all important modem on. Also, the stats I now get from the unlocked HG612 are great - am using the programs to get graphs and stats recorded so I have a record of everything.

 

Hope you get your sorted soon

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Highlighted
Aspiring Contributor
666 Views
Message 2 of 26

Re: My Infinity 2 connection and noise margin

Actually, I realise I am on 54MB which seems to be the upper end of one of the Banded profiles (27 - 54M download). I am hoping DLM eventually puts be back on the higher profile which looks like it is 37-74M download which means I would be able to enjoy 60M download speeds again.

 

Having read other this and forums, there are quite a few reports of their profile being stuck on a banded profile and DLM never actually improves the speed even though there is room for it to do so (i.e. higher SNR, 0 errors, etc.)

 

Any comments from anyone?

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Distinguished Guru
649 Views
Message 3 of 26

Re: My Infinity 2 connection and noise margin

One issue seems to be that BT Wholesale don't make the info about the current sync range being applied on a line readily available to customers. As I see it every line has a sync range applied even if it's the wide 0.128 - 40M or 0.128 - 80M as that is how the product sync speed caps are implemented. I don't see any harm in showing the customer the current range as they still couldn't control it, and it would be very useful in certain circumstances for understanding/diagnosing issues. The ISP's seem to be able to view this info if necessary.

Out of interest what is the acceptable download speed range stated by the BT Wholesale Speedtest Further Diagnostics for your number? I notice some results show a range of 20 or 40 - xxMbps whereas others seem to show a more variable lower figure. Not sure what that might signify though?
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Aspiring Contributor
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Message 4 of 26

Re: My Infinity 2 connection and noise margin

Hi umpire,

 

The BT Wholesale Speedtest Further Diagnostics states acceptable range of speeds is 36.55 Mbps-52.21 Mbps and the IP Profile for your line is - 52.21 Mbps. The HG612 is connected at a Downstream rate = 54000 Kbps, but with a Max Downstream rate of 58964 Kbps at the moment)

 

I now suspect that somehow I am getting the impacted Range B service (see exert from BT DSLchecker), even though at the start of November before I had the fault that slowed my line that BT apparently fixed, I was achieveing sync speeds of more than 60000 Kbps)

                                      Downstream   Upstream
                                      High    Low    High    Low  
FTTC Range A (Clean) -     65.8    45.3   18.7    11.8
FTTC Range B (Impacted)  55      32.4   17.9     8.5

 

 

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Distinguished Sage
Distinguished Sage
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Message 5 of 26

Re: My Infinity 2 connection and noise margin

I think you are in middle of band 'A'  is your noise margin about normal 6db?



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Highlighted
Expert
617 Views
Message 6 of 26

Re: My Infinity 2 connection and noise margin

Would the figures match  "Downstram Error Protection low/medium" setting  rather than a banded dlm profile?

 

If Phil doesn't mind a bit of telneting ? 🙂

 

Maybe post up :  xdslcmd info --stats

The one of the best tips I got when struggling with the eci/r was to save all the key commands in notepad and use a programme call putty. 

 

 

BTRetails sister isp plusnet produces detailed information reports.Carn't see any harm in BTRetail doing the same as umpire highlights?

 

An example:

 

 

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Distinguished Guru
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Message 7 of 26

Re: My Infinity 2 connection and noise margin


@Phil-S wrote:
acceptable range of speeds is 36.55 Mbps-52.21 Mbps and the IP Profile for your line is - 52.21 Mbps.
The HG612 is connected at a Downstream rate = 54000 Kbps, but with a Max Downstream rate of 58964 Kbps at the moment)

 


 

So an acceptable range of 36.55 - IP profile doesn't really give any extra clue as to the sync range being applied to your line. Smiley Sad

 

The connection speed of 54000 Kbps could just be a co-incidence and doesn't prove your line is limited to a range of 27 - 54Mbps. The higher than 6dB noise margin does make it look a bit more likely though. Was the noise margin you mentioned from sync time or much later? Is it recorded in the log at sync time. The margins can fluctuate a fair bit after sync time due to changes in noise levels.

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Highlighted
Aspiring Contributor
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Message 8 of 26

Re: My Infinity 2 connection and noise margin

No, noise margin is around 7.5 at the moment....hence why I am not happy....I uses to have a SNR of around 6 when I got around 60 Mbps.

 

 

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Highlighted
Aspiring Contributor
576 Views
Message 9 of 26

Re: My Infinity 2 connection and noise margin

Thanks Barry,

 

This is straight from DSLstats program as of now...

 

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 24198 Kbps, Downstream rate = 57344 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 54000 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):  7.3   15.4
Attn(dB):  18.0   0.0
Pwr(dBm):  12.9   7.5
   VDSL2 framing
   Bearer 0
MSGc:  -6  26
B:  150  237
M:  1  1
T:  0  42
R:  8  16
S:  0.0887  0.3781
L:  14336  5374
😧  16  1
I:  159  127
N:  159  254
Q:  16  0
V:  9  0
RxQueue:  33  0
TxQueue:  11  0
G.INP Framing:  18  0
G.INP lookback:  11  0
RRC bits:  0  24
   Bearer 1
MSGc:  122  -6
B:  0  0
M:  2  0
T:  2  0
R:  16  0
S:  8.0000  0.0000
L:  32  0
😧  1  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  3572623
OHFErr:  3  48
RS:  3875742288  532435
RSCorr:  761056  340
RSUnCorr: 0  0
   Bearer 1
OHF:  11327688  0
OHFErr:  0  0
RS:  90621011  0
RSCorr:  85  0
RSUnCorr: 0  0

   Retransmit Counters
rtx_tx:  2374875925  0
rtx_c:  5148  0
rtx_uc:  4  0

   G.INP Counters
LEFTRS:  126  0
minEFTR: 53983  0
errFreeBits: 149857729  0

   Bearer 0
HEC:  0  0
OCD:  0  0
LCD:  0  0
Total Cells: 1714738551  0
Data Cells: 603544741  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:  3  43
SES:  0  0
UAS:  28  28
AS:  181953

   Bearer 0
INP:  45.00  0.00
INPRein: 0.00  0.00
delay:  0  0
PER:  0.00  3.98
OR:  0.01  64.22
AgR:  54246.86 20063.54

   Bearer 1
INP:  2.00  0.00
INPRein: 2.00  0.00
delay:  0  0
PER:  16.06  0.01
OR:  63.75  0.01
AgR:  63.75 0.01

Bitswap: 133811/133811  131/131

Total time = 1 days 2 hours 33 min 1 sec
FEC:  761056  340
CRC:  3  48
ES:  3  43
SES:  0  0
UAS:  28  28
LOS:  0  0
LOF:  0  0
LOM:  0  0
Latest 15 minutes time = 3 min 1 sec
FEC:  850  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:  5061  4
CRC:  0  1
ES:  0  1
SES:  0  0
UAS:  0  0
LOS:  0  0
LOF:  0  0
LOM:  0  0
Latest 1 day time = 2 hours 33 min 1 sec
FEC:  48237  28
CRC:  0  5
ES:  0  5
SES:  0  0
UAS:  0  0
LOS:  0  0
LOF:  0  0
LOM:  0  0
Previous 1 day time = 24 hours 0 sec
FEC:  352445  149
CRC:  1  27
ES:  1  23
SES:  0  0
UAS:  0  0
LOS:  0  0
LOF:  0  0
LOM:  0  0
Since Link time = 2 days 2 hours 32 min 31 sec
FEC:  761056  340
CRC:  3  48
ES:  3  43
SES:  0  0
UAS:  0  0
LOS:  0  0
LOF:  0  0
LOM:  0  0
#

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Highlighted
Aspiring Contributor
566 Views
Message 10 of 26

Re: My Infinity 2 connection and noise margin

Thanks umpire.

 

SNR when i first synced with my new unlocked HG612 modem was 7.1. Now it's 7.3. It fluctuates on a daily basis between around 7 to 7.8.

 

Interestingly, I have noticed that my Upstream SNR of around 15.3 dB now is much higher than it used to be ....previously when it was all working fine, the sort of upload/download and SNR I had was:

Down Rate=60276000Kbps, Up Rate=19999000Kbps; SNR Margin Down=6.5dB, Up=6.9dB

 

My actual speeds on thinkbroadband speed test are currently around 50.5 Mbps down and 14 Mbps Up.

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