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197 posts

Master Geek
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Topic # 220330 6-Aug-2017 15:45
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I signed up for Ultra VDSL from Spark in 2014 and when we first got it - it was fantastic, 50 odd megabit down and 10 up.
Ive watch the sync rate slowly go down and down and now its at 9 megabit down... to the point where before i could stream 4k fine but now i sometimes have issues with even Spotify.
We live in a semi rural area - and a number of new houses have been built recently which seems to have coincided with the big drop.

 

Just wondered if theres anything I can do? I feel like theyre over selling the number of connections on the cabinet or something which has resulted in a much poorer service.
Would it make any difference if I switched providers or is it just a connections per cabinet issue?
Id kill for Fibre but looks like its a long way off in our location in Kapiti.

 

Any advice appreciated. Ive checked the chorus broadband checker and where it used to say something like current connection 50 mbit it now says 14 megabit.

 

I have so far - called Spark to get the line checked - nothing wring they said and just did a resync.
Ive tried upgrading the firmware on the huawei modem, have tried rebooting it a few times to see if it would make any difference etc.
I do  fair bit of work from home and it's getting more painful. I am considering adding a 4G wireless connection if it gets any worse.
any advice or suggestions appreciated.

 

cheers


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  Reply # 1839945 6-Aug-2017 15:49
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Can you post the full line stats from the modem?




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Master Geek
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  Reply # 1839946 6-Aug-2017 15:50
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sure. as below:

 

Connection Status
DSL synchronization status Up
DSL up time 7:10:19
Line standard VDSL2
Downstream line rate (kbit/s) 9179
Upstream line rate (kbit/s) 9623
Downstream SNR (dB) 11.8
Upstream SNR (dB) 8.4
Downstream line attenuation (dB) 30.3
Upstream line attenuation (dB) 28.6
Downstream output power (dBmV) 13.9
Upstream output power (dBmV) 9.5
Downstream CRC 37
Upstream CRC 21
Downstream FEC 128451
Upstream FEC 88715

 

 

 

[mod edit: mm - formatting]


 
 
 
 


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  Reply # 1839948 6-Aug-2017 16:00
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Do you have a master filter?

 

Changing ISP won't change your sync rate.

 

 


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  Reply # 1839950 6-Aug-2017 16:07
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Have you got stats from previous to compare?

 

My thoughts are that the 30dB downstream attenuation is just too high (line too long) for a respectable VDSL connection, so what you have is about right.

 

If you are in a rural area, you can often get a far higher sync rate for the same attenuation, but the reason for this is no crosstalk from other nearby xDSL connections. If new properties have been built and are running in the same feeder bundle, crosstalk will have increased, and a corresponding drop in sync rate.

 

Attenuation shouldn't have changed by any significant amount over this time (unless there has been major cable re-routing), so if you know what the attenuation was previously, you could compare. It's not that the cabinet is over subscribed, it's just that you are probably outside the normal limits for getting VDSL, but have managed in the past due to low crosstalk.

 

The other possibility is that something has caused the attenuation to increase recently - faulty or corroded cable joint somewhere is the obvious. @hio77 may be able to take a look for you perhaps


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  Reply # 1839959 6-Aug-2017 16:16
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Google ' VDSL crosstalk ' as more users connect to VDSL the speed will change

 

Linux


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Master Geek
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  Reply # 1839961 6-Aug-2017 16:18
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Something is afoot with your downstream connection, shouldn't be less than your upstream which is not bad for the attenuation you are getting
Downstream attenuation is quite high which would normally mean long distance from cabinet, but your download speed means you are within 1km

 

Semi-rural are you on a long driveway ?
Something may have happened to cable to house
Check where cable comes out of ground (or off pole) into little white box
Spiders and other crawlies may have had a field day in here
There should ideally be a master splitter in here that separates the Phone from Broadband (unless you're on Naked then remove)
Check internal house wiring, remove all wall plugs and diagnose if you have phones, faxes etc plugged in.




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Master Geek
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  Reply # 1839964 6-Aug-2017 16:22
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i believe we do have a master splitter - i vaguely remember the guy coming out from chorus and connecting us up and mentioning that.

 

Its also a relative new house (6 years old) and we are 500 metres from the cabinet...

 

 

 

i dont think i saved previous sync settings but will have a look just in case...

 

 

 

 


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  Reply # 1839965 6-Aug-2017 16:24
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House that is 6 years old has zero to do with it, Do you have naked or clothed broadband?

 

Linux




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Master Geek
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  Reply # 1839966 6-Aug-2017 16:24
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freakngeek:

 

Something is afoot with your downstream connection, shouldn't be less than your upstream which is not bad for the attenuation you are getting
Downstream attenuation is quite high which would normally mean long distance from cabinet, but your download speed means you are within 1km

 

Semi-rural are you on a long driveway ?
Something may have happened to cable to house
Check where cable comes out of ground (or off pole) into little white box
Spiders and other crawlies may have had a field day in here
There should ideally be a master splitter in here that separates the Phone from Broadband (unless you're on Naked then remove)
Check internal house wiring, remove all wall plugs and diagnose if you have phones, faxes etc plugged in.

 

 

 

 

driveway is only a few metres to the road, white box is on side of house and is pretty tidy - was only put in 3 years ago.

 

only cabling changes we have made in the house is connecting up cat 6 but that was a couple of years ago and it was great back then too.

 

i believe there is a master splitter - but we are on naked broadband anyway :(


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Master Geek
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  Reply # 1839995 6-Aug-2017 16:39
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Do you still have any other wall sockets connected internally in house (even with nothing in sockets) ?
Try to remove those connections if so
Signals will bounce around house
Ideally line in straight to modem is what you're after for best results

 

Had to sort out office which is in an old house, remove everything leading to not used sockets
Made quite a difference in connection speed

 

But the above doesn't really explain your drop in speed you once had, something gradual is happening
Should at least rule out your house being the issue.


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  Reply # 1839996 6-Aug-2017 16:41
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You should only have a single master xDSL jack point connected up if you are on naked BB, The speed has dropped quite a bit and I am sure the issue will be in the house wiring somewhere

 

Linux




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Master Geek
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  Reply # 1840009 6-Aug-2017 16:54
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so i figured id unplug the modem for a few minutes and while i was waiting i decided to dig out another cable (rj43?) and try that instead... not sure which of the two things caused it but its now back up to 38 mbit!

 

Downstream line rate (kbit/s) 38335
Upstream line rate (kbit/s) 25458
Downstream SNR (dB)  11.9
Upstream SNR (dB)  8
Downstream line attenuation (dB) 14.2
Upstream line attenuation (dB) 4.9
Downstream output power (dBmV) 14.4

 

??


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Master Geek
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  Reply # 1840012 6-Aug-2017 17:07
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Probably the cable at fault here. (RJ45 are the connectors), buy a new one, with length needed to reach wall
Your on a 12db profile, you should see a lowering of this over time if ddDLM decides you are worthy (not too many CRC errors) of either 8db ot better yet 6db, which will bring you back to aprox 50Mbps down




197 posts

Master Geek
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  Reply # 1840018 6-Aug-2017 17:15
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sweet! thanks, hopefully it does. though even 38 is great!

 

 

 

ps its not an rj45 lan connection its smaller than that on both ends - looks like the old rj43 connectors that go into the back of a phone though not sure if its the same.


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Master Geek
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  Reply # 1840035 6-Aug-2017 17:30
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Ah, RJ11 (4pin) most common or RJ12 (6pin) telephone connectors
Grab shortest one you can find to reach wall
And never ever use an extension, they are noise magnets 


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