What has happened to my VDSL?

Forums › Spark New Zealand (including Skinny and BigPipe) › What has happened to my VDSL?

keriboi

274 posts

Ultimate Geek

#127226 3-Aug-2013 06:07

After ten days of having awesome vdls I had my first drop out. My connection had been sitting at 40/10 and no issues. Now my connection downgrades to 25/10. Here is a log of my net overnight. Check out the errors
It had very little use. This is on xtra and right now only my iphone is using the net.

DSL Connection

Link Information

Uptime: 0 days, 7:38:19

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,354 / 25,446

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 2.9 / 12.8

Line Attenuation (Up/Down) [dB]: 29.1 / 16.4

SN Margin (Up/Down) [dB]: 18.6 / 13.4

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 125 / 0

Loss of Signal (Local/Remote): 180 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 2,592 / 37

FEC Errors (Up/Down): 14,822 / 1,023,775

CRC Errors (Up/Down): 26 / 26,326

HEC Errors (Up/Down): 0 / 1,287,299

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6018 posts

Uber Geek

Trusted

Geekzone

Lifetime subscriber

#871073 3-Aug-2013 06:07

Hello... Our robot found some keywords in your post, so here is an automated reply with some important things to note regarding broadband speeds.

If you are posting regarding DSL speeds please check that

- you have reset your modem and router

- your PC (or other PCs in your LAN) is not downloading large files when you are testing

- you are not being throttled by your ISP due to going over the monthly cap

- your tests are always done on an ethernet connection to the router - do not use wireless for testing

- you read this topic and follow the instructions there.

Make sure you provide information for other users to help you. If you have not already done it, please EDIT your post and add this now:

- Your ISP and plan

- Type of connection (ADSL, ADSL2, VDSL)

- Your modem DSL stats (do not worry about posting Speedtest, we need sync rate, attenuation and noise margin)

- Your general location (or street)

- If you are rural or urban

- If you know your connection is to an exchange, cabinet or conklin

- If your connection is to a ULL or wholesale service

- If you have done an isolation test as per the link above

Most of the problems with speed are likely to be related to internal wiring issues. Read this discussion to find out more about this. Your ISP is not intentionally slowing you down today (unless you are on a managed plan). Also if this is the school holidays it's likely you will notice slower than usual speed due to more users online.

A master splitter is required for VDSL2 and in most cases will improve speeds on DSL connections. Regular disconnections can be a monitored alarm or a set top box trying to connect. If there's an alarm connected to your line even if you don't have an alarm contract it may still try to connect so it's worth checking.

I recommend you read these two blog posts:

- Is your premises phone wiring impacting your broadband performance? (very technical)

- Are you receiving a substandard ULL ADSL2+ connection from your ISP?

I am the Geekzone Robot and I am here to help. I am from the Internet. I do not interact. Do not expect other replies from me.

These links are referral codes: Sharesies | Mighty Ape

cbrpilot

955 posts

Ultimate Geek

Trusted

Spark NZ

#871083 3-Aug-2013 07:06

Try restarting your modem and looking at the sync rates again.

My views are my own, and may not necessarily represent those of my employer.

keriboi

274 posts

Ultimate Geek

#871084 3-Aug-2013 07:14

I have restarted it multiple times. Leave modem off for two mins before restarts.

Just did now heres the stats. Will post them again in 30 mins

DSL Connection

Link Information

Uptime: 0 days, 0:00:12

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,354 / 25,641

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 1.5 / 13.2

Line Attenuation (Up/Down) [dB]: 28.0 / 15.4

SN Margin (Up/Down) [dB]: 17.6 / 11.9

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 0 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 0 / 0

FEC Errors (Up/Down): 0 / 0

CRC Errors (Up/Down): 0 / 0

HEC Errors (Up/Down): 0 / 0

keriboi

274 posts

Ultimate Geek

#871085 3-Aug-2013 07:22

This what I used to have and was stable for 10 days

keriboi:
stitch:
ke

Impr

Not sure why it hasnt recorded any data.

Uptime: 0 days, 7:44:57

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,354 / 40,961

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 429496725.6 / 13.5

Line Attenuation (Up/Down) [dB]: 22.6 / 10.4

SN Margin (Up/Down) [dB]: 18.6 / 12.5

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 8 / 0

Loss of Signal (Local/Remote): 2 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 24 / 0

FEC Errors (Up/Down): 195 / 15,765

CRC Errors (Up/Down): 1 / 3

HEC Errors (Up/Down): 0 / 4

cbrpilot

955 posts

Ultimate Geek

Trusted

Spark NZ

#871099 3-Aug-2013 09:14

I'd give the helpdesk a call and see what they can do.
They probably know the Dynamic Line Management better than I do. I've no idea if this is just the DLM going conservative, or whether a fault or change in line condition has occurred.

My views are my own, and may not necessarily represent those of my employer.

nitrotech

1285 posts

Uber Geek

#871102 3-Aug-2013 09:43

When your attenuation has jumped from 10 to 16 a massive decrease in speed is to be expected.

You might need someone to do some investigation into your wiring - there will be a reason it's jumped.

keriboi

274 posts

Ultimate Geek

#871103 3-Aug-2013 09:48

Wiring is 10 days old. New line from outside house.

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

Jarsky

142 posts

Master Geek

#871114 3-Aug-2013 10:40

A jump to 16dB attenuation is going to do that.

This is also indicative of a physical problem - a lot of errors for 7 hours:

FEC Errors (Up/Down): 14,822 / 1,023,775

CRC Errors (Up/Down): 26 / 26,326

HEC Errors (Up/Down): 0 / 1,287,299

Some sort of physical issue. Probably cable/wiring related

johnr

19282 posts

Uber Geek
Inactive user

#871130 3-Aug-2013 11:10

keriboi: Wiring is 10 days old. New line from outside house.

Then it must have a issue

keriboi

274 posts

Ultimate Geek

#871217 3-Aug-2013 14:16

Thanks guys will harass the help desk on monday.

Just did a reset. Up to 35

Details here

Link Information

Uptime: 0 days, 0:02:55

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,354 / 35,030

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 429496727.2 / 13.5

Line Attenuation (Up/Down) [dB]: 24.2 / 11.9

SN Margin (Up/Down) [dB]: 18.1 / 12.3

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 0 / 0

Loss of Signal (Local/Remote): 0 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 0 / 0

FEC Errors (Up/Down): 0 / 0

CRC Errors (Up/Down): 1 / 0

HEC Errors (Up/Down): 0 / 0

keriboi

274 posts

Ultimate Geek

#871247 3-Aug-2013 15:54

Update. Getting regular drop outs now. Help desk has put a 24 monitoring on my connection. I had a drop out while on the phone and they could see my connection go from 27 to 24 down although at their end there are no drop outs showing up which is strange.

Few erros for a connection of just 3 mins

Link Information

Uptime: 0 days, 0:02:59

DSL Type: ITU-T G.993.2

Bandwidth (Up/Down) [kbps/kbps]: 10,354 / 24,552

Data Transferred (Sent/Received) [B/B]: 0 / 0

Output Power (Up/Down) [dBm]: 1.7 / 13.1

Line Attenuation (Up/Down) [dB]: 27.8 / 15.6

SN Margin (Up/Down) [dB]: 17.4 / 11.6

System Vendor ID (Local/Remote): TMMB / ----

Chipset Vendor ID (Local/Remote): BDCM / IKNS

Loss of Framing (Local/Remote): 33 / 0

Loss of Signal (Local/Remote): 50 / 0

Loss of Power (Local/Remote): 0 / 0

Loss of Link (Remote): -

Error Seconds (Local/Remote): 190 / 0

FEC Errors (Up/Down): 0 / 27,539

CRC Errors (Up/Down): 1 / 474

HEC Errors (Up/Down): 0 / 13,912

lchiu7

6474 posts

Uber Geek

Trusted

#871376 3-Aug-2013 20:20

If you want to see CRC errors look at this

Link InformationUptime:   0 days, 0:06:06
FEC Errors (Up/Down):   0 / 918,362
CRC Errors (Up/Down):   1 / 2,163
HEC Errors (Up/Down):   0 / 15,051

Link InformationUptime:   0 days, 0:07:58
FEC Errors (Up/Down):   0 / 1,123,983
CRC Errors (Up/Down):   1 / 2,818
HEC Errors (Up/Down):   0 / 18,459

Link InformationUptime:   0 days, 0:10:40
FEC Errors (Up/Down):   0 / 1,427,025
CRC Errors (Up/Down):   1 / 3,756
HEC Errors (Up/Down):   0 / 24,239

Link InformationUptime:   0 days, 0:18:24
FEC Errors (Up/Down):   0 / 3,814,806
CRC Errors (Up/Down):   1 / 13,283
HEC Errors (Up/Down):   0 / 81,759

So this is from 6 minutes into restarting the modem until 12 minutes later with a couple of speedtests and regular browsing. The CRC errors at 2,163, then 2,818, 3,776 and then 13,283 (down) seem♠ very high and might explain the lousy transfer rates I get (which range form 8Mbs to 18Mbs) on a link which is supposed to have up to 30Mbs according to Chorus.

The very low CRC errors up would also explain why my uploads in the Speedtest always get 8-9Mbs no matter how lousy the downloads are.

Must get on the phone to Telecom to complain when I have the time. This seems very unsatisfactory for VDSL connection that has only been on for 3 weeks.

Staying in Wellington. Check out my AirBnB in the Wellington CBD. https://www.airbnb.co.nz/h/wellycbd PM me and mention GZ to get a 15% discount and no AirBnB charges.

hamish225

1418 posts

Uber Geek

ID Verified

#871414 3-Aug-2013 22:01

has it rained since you got this new line? what if water got into the line?

*Insert big spe*dtest result here*

quickymart

13935 posts

Uber Geek

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#871429 3-Aug-2013 22:27

Port reset worth a try?

hio77

12999 posts

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Lizard Networks

#871440 3-Aug-2013 22:47

before you get too worried about the errors, might wanna be looking into how your attention jumped so high.. you could say whatever change was made influenced the increase in errors

#include <std_disclaimer>

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

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