Changes to DLM Incoming

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356 posts

Ultimate Geek

#1790409 27-May-2017 22:24

datahawk:OK, I see now after checking my previous interleave stats that my ping has also been static at 13ms regardless of depth which also jumped from 0 to ~250 when I played with the Draytek SNR adjustment and firmware updates.

Your Interleave depth jump is normal
I was on Fast (zero depth) also till ddDLM kicked in
When I trialled modem at road, my connections were 65/20Mbps interleave depth was 277 then
Modem in house at 44/8Mbps the Interleave depth was 188
With SNR tweaks and higher connection speeds the Depth also goes up.

AidanP

76 posts

Master Geek

#1790442 27-May-2017 23:48

What's the difference between VDSL Annex A and VDSL Annex B?

AidanP

76 posts

Master Geek

#1790454 28-May-2017 08:30

Our modem reset again today at 4 am, nothing had changed at all exept for the downstream attainable rate which had gone from 56 to 68 but the rate I am syncing at is only 36/11 which the download is way to slow for my distance and my line quality as before the new dlm change came into place we were getting 53/9, what should I do?

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1790520 28-May-2017 09:27

not much you can do

atomeara

324 posts

Ultimate Geek

#1790563 28-May-2017 11:28

AidanP: What's the difference between VDSL Annex A and VDSL Annex B?

Annex B is for ADSL with ISDN. Not something we have in NZ.

smalltrader

174 posts

Master Geek

#1790595 28-May-2017 12:27

AidanP: Our modem reset again today at 4 am, nothing had changed at all exept for the downstream attainable rate which had gone from 56 to 68 but the rate I am syncing at is only 36/11 which the download is way to slow for my distance and my line quality as before the new dlm change came into place we were getting 53/9, what should I do?

High attainable rate but low sync rate would suggest wiring issue related to noise and/or interference. It also could be cauesd by very high VDSL update/usage in the neighbourhood resulting in interference at the cabinet level (quite unlikely though IMHO)

As a starter, are you able to hook up your modem to the External Termination Point and see what sync rate you are getting. This will rule out (or rule in) in house wiring issue. Beyond the ETP, the wiring is Chorus's properties and only Chorus can investigate external wiring issue.

AidanP

76 posts

Master Geek

#1790619 28-May-2017 13:44

atomeara:

AidanP: What's the difference between VDSL Annex A and VDSL Annex B?
Annex B is for ADSL with ISDN. Not something we have in NZ.

I have VDSL running on Annex B which i dont know if its something to do with the cabinet or something else, i dont know

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AidanP

76 posts

Master Geek

#1790622 28-May-2017 13:48

smalltrader:

AidanP: Our modem reset again today at 4 am, nothing had changed at all exept for the downstream attainable rate which had gone from 56 to 68 but the rate I am syncing at is only 36/11 which the download is way to slow for my distance and my line quality as before the new dlm change came into place we were getting 53/9, what should I do?

High attainable rate but low sync rate would suggest wiring issue related to noise and/or interference. It also could be cauesd by very high VDSL update/usage in the neighbourhood resulting in interference at the cabinet level (quite unlikely though IMHO)

As a starter, are you able to hook up your modem to the External Termination Point and see what sync rate you are getting. This will rule out (or rule in) in house wiring issue. Beyond the ETP, the wiring is Chorus's properties and only Chorus can investigate external wiring issue.

I am running the modem off the master splitter which is connected to the copper cable that runs out to the street, my stats are as follows

Synchronized Time:

0:3:46:49

Number of Synchronizations:

Mode:

VDSL2 Annex B

Traffic Type:

PTM

Status:

Link Power State:

Copper Loop(kft):

0.0

Downstream

Upstream

Line Coding(Trellis):

SNR Margin (0.1 dB):

159

Attenuation (0.1 dB):

206

Output Power (0.1 dBm):

151

-7

Attainable Rate (Kbps):

67775

11880

Path 0

Path 1

Downstream

Upstream

Downstream

Upstream

Rate (Kbps):

36625

11853

B (# of bytes in Mux Data Frame):

241

M (# of Mux Data Frames in an RS codeword):

T (# of Mux Data Frames in an OH sub-frame):

R (# of redundancy bytes in the RS codeword):

S (# of data symbols over which the RS code word spans):

0.0417

0.6489

0.0000

L (# of bits transmitted in each data symbol):

12288

3144

D (interleaver depth):

777

I (interleaver block size in bytes):

N (RS codeword size):

255

Delay (msec):

INP (DMT symbol):

4.00

0.00

OH Frames:

5061848

1254020

OH Frame Errors:

RS Words:

1295738520

1924946

RS Correctable Errors:

41826

1201

RS Uncorrectable Errors:

HEC Errors:

OCD Errors:

LCD Errors:

Total Cells:

954430850

Data Cells:

65820506

Bit Errors:

Total ES:

Total SES:

Total UAS:

Jase2985

13457 posts

Uber Geek

ID Verified

Lifetime subscriber

#1790660 28-May-2017 15:10

Some formatting would have been nice :)

if there is nothing wrong at your end you could try lodge a fault with your ISP but you could be liable for a charge for no fault found if chorus find nothing.

AidanP

76 posts

Master Geek

#1790664 28-May-2017 15:33

Jase2985:

Some formatting would have been nice :)

if there is nothing wrong at your end you could try lodge a fault with your ISP but you could be liable for a charge for no fault found if chorus find nothing.

sorry for the big long thing it looked good when i copied it. I will contact my isp soon to get it sorted

smalltrader

174 posts

Master Geek

#1790673 28-May-2017 16:15

AidanP,

Your sync rate at the ETP is still low and that rules out internal wiring issue. That leaves a couple of areas to investigate:

- Wiring from the ETP back to the cabinet

- Interference at the cabinet level due to high VDSL usage in your area. Low probability IMHO

Yep. For the first problem, you will have to log a call with your ISP. If it is the second problem, it will not be registered as a fault as this is classified as a part of "normal" VDSL operation at the cabinet level.

freakngeek

356 posts

Ultimate Geek

#1790700 28-May-2017 16:47

Possibly first thing is to sort getting your modem running in Annex A mode ?
Annex B is working but not optimised for NZ

Not familiar with Netcomm modems but there must surely be a Firmware for it

cddt

1548 posts

Uber Geek

#1790732 28-May-2017 17:38

Looks like we synced a few days ago and I've noticed a major improvement on the upload. Previously was getting 1.0 Mbps, now it's up to 1.4.

No change downstream.

PZB

4 posts

Wannabe Geek

#1790883 29-May-2017 08:20

I noticed last night mine has gone from 31/8 to 41/11 I'am ok with that its good

dclegg

2806 posts

Uber Geek

Trusted

#1790904 29-May-2017 09:17

The day after Chorus started installing fibre into our street, my VDSL modem resynched with these stats (previously 46Mbps/8Mbps). My current working theory is that it's becoming increasingly nervous about its ongoing role in our household, and is trying a last ditch attempt to prove to us that it can still be useful :-)

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