Post your FTTC line stats & unlocking info

Got a few more recent up to date stats, If you could please take a look @Bald_Eagle1. There more detailed so maybe you can see if there are any issues.

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 6355 Kbps, Downstream rate = 37540 Kbps
Path: 0, Upstream rate = 2000 Kbps, Downstream rate = 16495 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 14.8 15.2
Attn(dB): 0.0 0.0
Pwr(dBm): 9.8 4.3
VDSL2 framing
Path 0
B: 29 48
M: 1 1
T: 58 6
R: 16 16
S: 0.0577 0.7651
L: 6377 711
D: 1129 1
I: 46 68
N: 46 68
Counters
Path 0
OHF: 130349 40904
OHFErr: 0 0
RS: 45361056 3435132
RSCorr: 1077 0
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 20829512 0
Data Cells: 7807 0
Drop Cells: 0
Bit Errors: 0 0

ES: 0 0
SES: 0 0
UAS: 16 16
AS: 658

Path 0
INP: 11.00 0.00
PER: 5.02 16.06
delay: 16.00 0.00
OR: 76.48 167.29

Bitswap: 5 0

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 6358 Kbps, Downstream rate = 37452 Kbps
Path: 0, Upstream rate = 2000 Kbps, Downstream rate = 16495 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (880,1195) (1984,2771)
DS: (32,859) (1216,1959) (2792,4083)
Medley Phase (Final) Band Plan
US: (0,95) (880,1195)
DS: (32,859) (1216,1959)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 6358 kbps 37452 kbps
Actual Aggregate Tx Power: 4.3 dBm 9.8 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 4.2 44.2 61.8 N/A 19.9 55.5 0.1

Signal Attenuation(dB): 4.1 44.2 N/A N/A 19.9 55.5 N/A

SNR Margin(dB): 17.4 15.1 N/A N/A 14.5 15.2 N/A

TX Power(dBm): 0.5 2.0 N/A N/A 8.8 3.2 N/A
 
JoshShep said:
Possibly, But I think the sync speed has more to do with the SNR margin, mine being at 15 would explain why I'm syncing so low. But it's a big learning curve for me, ADSL so much easier to understand!
Click to expand...


I suppose it IS dictated by SNRM, but what causes a high SNRM?
Errors, RFI interference, noise, dodgy joint connections?

From what I have seen, those users capped at 40Mb, with attainable rates much higher have DS SNRM up toward 30dB, so is "something" currently capping your sync speed such as DLM, or a stuck BT Sync Profile (not IP Profile)

Also, as you were initially provided with an ECI modem, perhaps your DSLAM in the cabinet is also ECI & not fully compatible with the HG612.

Huawei HG612 modems appear to be provided for users connected to Huawei cabinet DSLAMS & ECI modems to users connected to ECI DSLAMS.

We have already noted that your "Discovery Phase" & Medley Phase" use a slightly different tone band plan than users connected to Huawei DSLAMs.
 
Bald_Eagle1 said:
I suppose it IS dictated by SNRM, but what causes a high SNRM?
Errors, RFI interference, noise, dodgy joint connections?

From what I have seen, those users capped at 40Mb, with attainable rates much higher have DS SNRM up toward 30dB, so is "something" currently capping your sync speed such as DLM, or a stuck BT Sync Profile (not IP Profile)

Also, as you were initially provided with an ECI modem, perhaps your DSLAM in the cabinet is also ECI & not fully compatible with the HG612.

Huawei HG612 modems appear to be provided for users connected to Huawei cabinet DSLAMS & ECI modems to users connected to ECI DSLAMS.

We have already noted that your "Discovery Phase" & Medley Phase" use a slightly different tone band plan than users connected to Huawei DSLAMs.
Click to expand...

I think your right about something being capped... The last Engineer I had said he requested a line reset but they refused because of errors on the line, Thus probably meaning they've capped my profile and refuse to reset allowing DLM to train again. Would DML reset once I'm placed on 80/20? I hope so because my speeds are similar to what I was getting on ADSL2 atm. Thanks for the help Bald_Eagle1!
 
JoshShep said:
Got a few more recent up to date stats, If you could please take a look @Bald_Eagle1. There more detailed so maybe you can see if there are any issues.
Click to expand...

I am a long way from being an expert in these matters.
I am learningf as I go along.

What stands out as potential issues though is:-

SNR (dB): 14.8 15.2 - looks quite high.

Pwr(dBm): 9.8 4.3 - looks quite low.

D: 1129 1 (Interleaving looks quite high - 1 = OFF)

INP: 11.00 0.00 - looks high, even mine is only 8.00 at worst

delay: 16.00 0.00 - looks high (double mine)

Line & Signal attenuation are both better than mine.

Are you sure it's not just constant rebooting/reconnecting that has made DLM think you have a very unstable connection?
 
JoshShep said:
I think your right about something being capped... The last Engineer I had said he requested a line reset but they refused because of errors on the line, Thus probably meaning they've capped my profile and refuse to reset allowing DLM to train again.
Click to expand...

I had the same situation once over.
Since then quite a bit of work has been carried out on my line from the cabinet, eventually leading to a DLM rest a couple of weeks ago when I achieved 35.3Mb sync speed.

It has dropped since, but I have resisted the urge to reboot the modem as I have been trying to convince DLM that my connection is now reasonably stable again.

Would DML reset once I'm placed on 80/20? I hope so because my speeds are similar to what I was getting on ADSL2 atm. Thanks for the help Bald_Eagle1!
Click to expand...

Maybe.
I'll no doubt find out tomorrow..........
 
Last edited:
Bald_Eagle1 said:
I am a long way from being an expert in these matters.
I am learningf as I go along.

What stands out as potential issues though is:-

SNR (dB): 14.8 15.2 - looks quite high.

Pwr(dBm): 9.8 4.3 - looks quite low.

D: 1129 1 (Interleaving looks quite high - 1 = OFF)

INP: 11.00 0.00 - looks high, even mine is only 8.00 at worst

delay: 16.00 0.00 - looks high (double mine)

Line & Signal attenuation are both better than mine.

Are you sure it's not just constant rebooting/reconnecting that has made DLM think you have a very unstable connection?
Click to expand...

I promise I don't reboot the modem, only when I want to get some line stats, I will now leave everything alone now though and just see how things go, I just got this email so might interest you, It looks like DLM will be reset :)

"Hi,

This is a quick note to prepare you for your 80/20 fibre upgrade, scheduled to take place either on the 20th/21st or 22nd March. Your exact date should be on a previous email from me.

From initial testing of internal employee triallists, we have discovered the new 80/20 profile is updated to the service without the need to reboot any equipment, as I previously stated. Therefore, keep your equipment ON throughout the trial.

The 80/20 profile will be updated to your line between 00:01 and 03:00 on the day of your upgrade (i.e. Small Hours). This increase should be easily identifiable by the lift in your Up throughput on your TalkTalk Labs Desktop profile. Please do your best, if able to do so, to have the Desktop app running and recording results over the next few days so the upgrade can be easily spotted.

However, The main point of this email is to explain that you may see less throughput than expected from the early stages of upgrade based from being placed onto a 80/20 profile. This is normal. The reason for this is OpenReach operate a DLM (Digital Line Management) system on the Fibre line that may fluctuate your speeds for up to 2 weeks. We operate a similar system on our ADSL lines and it is found to be very effective.

TalkTalk do not have control over this system, but the line will rest at a speed that preserves stability - and when reasonably "happy", the line will stay with this speed.

I have limited experience or knowledge of this system, but would be happy to take your questions or points (and take them to someone who does).

Kind Regards"
 
Router Fan said:
What I mean is: can these scripts be made to obtain SNR info and sync speed from other modem routers like the Netgear DG834GT or the 2Wire 2700HGV?
Click to expand...

Possibly, with quite a lot of editing.

I used to use DMT.EXE & Routerstats when I had an ADSL connection with my DG834GT modem/router combination:-

DMT29-11-2010.jpg



I can't find any RouterStats graphs now though.

HTH.....
 
Line Status
Help
Downstream Upstream
Attainable rate (kbit/s) 39500 7148
SNR margin (dB) 1.3 18.3
Line attenuation (dB) 0 0
Output power (dBmV) 11.1 -1.4

Statistics
Help

Path 0
Path 1
Downstream Upstream
Line rate (kbit/s) 39996 1999
CRC errors 787869 0
FEC errors 16845 518
HEC errors 231608 0
 
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 7129 Kbps, Downstream rate = 39280 Kbps
Path: 0, Upstream rate = 1999 Kbps, Downstream rate = 39996 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 1.2 18.3
Attn(dB): 0.0 0.0
Pwr(dBm): 11.1 -1.6
VDSL2 framing
Path 0
B: 57 31
M: 1 2
T: 64 34
R: 16 16
S: 0.0461 0.9907
L: 12835 646
D: 701 1
I: 74 80
N: 74 80
Counters
Path 0
OHF: 363287337 127117
OHFErr: 16854 519
RS: 1031740441 4078328
RSCorr: 318412989 2600
RSUnCorr: 788063 0

Path 0
HEC: 231656 0
OCD: 0 0
LCD: 0 0
Total Cells: 1963189567 0
Data Cells: 261128204 0
Drop Cells: 0
Bit Errors: 0 0

ES: 1937 511
SES: 14 0
UAS: 15 15
AS: 807448

Path 0
INP: 3.00 0.00
PER: 2.21 16.84
delay: 8.00 0.00
OR: 86.72 60.80

Bitswap: 502850 7521



# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Max: Upstream rate = 7170 Kbps, Downstream rate = 39500 Kbps
Path: 0, Upstream rate = 1999 Kbps, Downstream rate = 39996 Kbps

Discovery Phase (Initial) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963) (2792,3939)
Medley Phase (Final) Band Plan
US: (0,95) (868,1207) (1972,2783)
DS: (32,859) (1216,1963)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 7170 kbps 39500 kbps
Actual Aggregate Tx Power: - 1.5 dBm 11.0 dBm
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 6.5 39.8 59.5 N/A 17.3 49.8 0.1

Signal Attenuation(dB): 12.2 39.1 N/A N/A 17.3 49.8 N/A

SNR Margin(dB): 18.4 18.3 N/A N/A 1.4 1.1 N/A

TX Power(dBm): -3.7 -5.1 -128.0 N/A 8.2 7.8 N/A




mmm, not looking good atm :s Although it is still synced at 39996 apparently at this snr i can only get 39500....

How do you tell if your on fast path or interleaving?



Now after the free sky regrade:- to 40/10

# xdslcmd info -show
xdslcmd: too many parameters
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 2
Max: Upstream rate = 7301 Kbps, Downstream rate = 44604 Kbps
Path: 0, Upstream rate = 7345 Kbps, Downstream rate = 38010 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.2 5.9
Attn(dB): 0.0 0.0
Pwr(dBm): 11.0 -0.9
VDSL2 framing
Path 0
B: 63 223
M: 1 1
T: 64 40
R: 16 0
S: 0.0536 0.9686
L: 11945 1850
D: 603 1
I: 80 112
N: 80 224
Counters
Path 0
OHF: 328191 87474
OHFErr: 0 1
RS: 63061126 3497552
RSCorr: 3455 0
RSUnCorr: 0 0

Path 0
HEC: 0 0
OCD: 0 0
LCD: 0 0
Total Cells: 61933626 0
Data Cells: 627077 0
Drop Cells: 0
Bit Errors: 0 0

ES: 16 1
SES: 15 0
UAS: 33 33
AS: 847

Path 0
INP: 3.00 0.00
PER: 2.57 9.68
delay: 8.00 0.00
OR: 65.32 26.42

Bitswap: 177 99
 
Last edited:
Angel_Rex said:
Ah ok cheers. Is there anyway to get it taken off or would the sheer amount of errors on my line be causing the interleaving to be on?
Click to expand...

As far as I am aware, unlike ADSL connections, ISPs cannot remove or request removal of interleaving for FTTC connections as it is all controlled via DLM.
Neither can they reset or request a reset of SNR levels.

Also, currently they cannot request a DLM reset as only on-site engineers can request that & sometimes BT even refuse engineer requests.

ISPs can request an engineer's visit, but if no fault is found (i.e. the connection is performing within BT's low thresholds, you COULD be charged for the visit.

It might be the amount of errors, or the frequency of diconnections/reconnections that turns interleaving on in the first place.
 
Last edited:
Angel_Rex said:
Shame, Ive not had any disconnects at all, since 2nd march it has been reset by me 3- 4 times.

once to move, once to resync and the firmware hack :)

ill try to figure out whats causing my low snr and see if that helps.

many thanks
Click to expand...

Have you tried out the graphing scripts, available at https://docs.google.com/leaf?id=0B6wW18mYskvBMTEyNzk2MTQtNWEyNC00NTBlLWFiMjYtNTg0MDdhMTBlNDdk&sort=name&layout=list&pid=0B6wW18mYskvBODZjMTk1YmUtZDA0ZC00Y2NlLWEwYWItMjEyNmRjNTk0MWU5&cindex=4

They will provide lots of useful information & show how a connection changes over a period of time.

They are now very quick to install/set up, but only currently work with the Huawei HG612 modem.
 
Bald_Eagle1 said:
Have you tried out the graphing scripts, available at https://docs.google.com/leaf?id=0B6wW18mYskvBMTEyNzk2MTQtNWEyNC00NTBlLWFiMjYtNTg0MDdhMTBlNDdk&sort=name&layout=list&pid=0B6wW18mYskvBODZjMTk1YmUtZDA0ZC00Y2NlLWEwYWItMjEyNmRjNTk0MWU5&cindex=4

They will provide lots of useful information & show how a connection changes over a period of time.

They are now very quick to install/set up, but only currently work with the Huawei HG612 modem.
Click to expand...


Cheers for that I will give them a go.
 
JoshShep said:
Any updates Paul? You gone live yet?
Click to expand...

It looks like I was switched to the 80/20 trial just after midnight.

It was just an experiment & miracles weren't expected & neither were they delivered, as confirmed by my stats.

My ISP also provided this confirmation info this afternoon:-

2:56pm, Tuesday 20 Mar 2012
**internal**
GEA:
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 32.2 Mbps
Upstream Speed 5.7 Mbps
Appointment Required N
Fault Report Advised N
Profile Name 0.128M-80M Downstream, Interleaving Off - 0.128M-20M Upstream, Interleaving Off
Time Stamp 2012-03-20T00:00:00
PTTR: 27681 (31196 profile on 20/03/12)
RADIUS: 14:24:43 (on going)
Summary: Line now on the 80M profile with INP Off but will likely change profile shortly as the line is only achieving 32.2Mbps due to loop loss limitations.
Click to expand...
 
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