VDSL upload slower the ADSL on same line?

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#1308020 19-May-2015 21:14

Thanks for all the comments. Chorus guy arrived after dark tonight and took a look. Tested at the ETP and confirmed that the problem was on the network, not internally. Went to trace the line and left a message to say there is an issue affecting the whole cabinet and that he would resolve it tomorrow. Fingers crossed it sorts out the VDSL speed issues as well...

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#1311613 25-May-2015 21:02

alphabet: Thanks for all the comments. Chorus guy arrived after dark tonight and took a look. Tested at the ETP and confirmed that the problem was on the network, not internally. Went to trace the line and left a message to say there is an issue affecting the whole cabinet and that he would resolve it tomorrow. Fingers crossed it sorts out the VDSL speed issues as well...

What happened?

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alphabet

25 posts

Geek

#1311813 26-May-2015 09:28

Sorry for lack of update, been out of town...

Phoneline seems to be working better now, but VDSL performance has actually gotten worse...

Modem still shows max line speeds of 14.3 / 0.5 but Speedtest results have degraded from the same as max line speeds to 9 / 0.4

I walked the line over the weekend, direct path to the Mt Albert exchange is 680m. But the tech thinks the line goes out of my street to a small cabinet (don't think it has equipment in it, just connectors) the wrong way up New North road before looping back to the exchange - making it more like 960m once you include the loop.

Is such poor performance expected over this distance?

I tried to check expected speeds on this calculator, http://www.speedguide.net/dsl_speed_calc.php

But, my modem DSL stats show attenuation as 0 ?????

DSL synchronization status:Up

Connection status:Showtime

Upstream line rate (kbit/s):467

Downstream line rate (kbit/s):14235

Maximum upstream rate (kbit/s):486

Maximum downstream rate (kbit/s):14684

Upstream noise safety coefficient (dB):12

Downstream noise safety coefficient (dB):13.1

Upstream interleave depth:0

Downstream interleave depth:0

Line standard:VDSL

Upstream line attenuation (dB):0

Downstream line attenuation (dB):0

Upstream output power (dBmV):2.8

Downstream output power (dBmV):18.6

Downstream interleave depth:None

DSL up time:5 days 21 hours 43 minutes 33 seconds

johnr

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#1311836 26-May-2015 09:51

Copper does not always run direct to the exchange / cabinet, It can run up and down the same street on the other side of the road

Jaxar

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#1311839 26-May-2015 09:57

It isn't unusual for phone lines to not take a direct route. My understanding a lot of it has to do with the infrastructure being designed pre-xDSL.
At 960m I would not expect an optimal VDSL experience and I would expect your attenuation to be higher than 0.

Please note: I have a professional bias towards Vodafone.

alphabet

25 posts

Geek

#1311849 26-May-2015 10:13

Thanks guys - is there any way to force the Voda-supplied Huawei HG659 to tell me the line attenuation in dB instead of showing zero?

DSL synchronization status: Up
Connection status: Showtime
Upstream line rate (kbit/s): 467
Downstream line rate (kbit/s): 14235
Maximum upstream rate (kbit/s): 497
Maximum downstream rate (kbit/s): 14684
Upstream noise safety coefficient (dB): 12.1
Downstream noise safety coefficient (dB): 13.1
Upstream interleave depth: 0
Downstream interleave depth: 0
Line standard: VDSL
Upstream line attenuation (dB): 0
Downstream line attenuation (dB): 0
Upstream output power (dBmV): 2.8
Downstream output power (dBmV): 18.6
Downstream interleave depth: None
DSL up time: 5 days 22 hours 27 minutes 55 seconds

johnr

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#1311854 26-May-2015 10:19

Request a move back to ADSL the modem you have can be configured to support ADSL2+

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hio77

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#1311857 26-May-2015 10:21

Jaxar: It isn't unusual for phone lines to not take a direct route. My understanding a lot of it has to do with the infrastructure being designed pre-xDSL.
At 960m I would not expect an optimal VDSL experience and I would expect your attenuation to be higher than 0.

The attenuation figure is a bug that exists in the HG659, Im somewhat surprised Vodafone still haven't looked at patching it along with the other issues with that firmware....

@alphabet as painful as it is, if you want to know your actual attenuation figure, you need to call Vodafone and ask them to check from their side.

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

dylanp

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#1311860 26-May-2015 10:28

here you go.

Parameter Value (U) Value (D)
lqd.parameter.actual.bitrate 467 14235
lqd.parameter.attainable.bitrate 497 14184
lqd.parameter.rel.capacity.occupation 97 97
lqd.parameter.attenuation 51.1 22.4
lqd.parameter.loop.attenuation 57.5 22.4
lqd.parameter.noise.margin 12.1 12.4

Hmm. Will ask some of the faults team about this one.

johnr

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#1311867 26-May-2015 10:38

So that is a move back to ADSL

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#1311879 26-May-2015 10:56

alphabet: ... I walked the line over the weekend, direct path to the Mt Albert exchange is 680m. But the tech thinks the line goes out of my street to a small cabinet (don't think it has equipment in it, just connectors) the wrong way up New North road before looping back to the exchange - making it more like 960m once you include the loop.

Is such poor performance expected over this distance? ...

Yes.

Go back to ADSL.

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johnr

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#1311882 26-May-2015 10:58

Or move house closer to a VDSL cabinet / exchange

alphabet

25 posts

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#1311913 26-May-2015 11:38

Thanks all, looks like a fall-back to ADSL2+ is on the cards then, glad to hear a modem change will not be required.

First I'll wait to hear if VodafoneDylan finds out anything from the faults team as he offered above. (VodaDylan - I PMed you my account details in case it helps.)

dylanp

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#1312788 27-May-2015 14:46

We're going to lodge another fault to Chorus and ask them to try and find out what is causing the slow upload as that's the current obvious issue. If that's fixed hopefully it will also help the download speed too. It won't be truck rolled (no request for a person in a van like with faults like no dial tone etc) and could take a couple of days for them to examine it. Will let you know when I know more.

Jaxar

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#1312843 27-May-2015 15:41

My experience with VDSL connections provisioned on too high of an attenuation but not so high that it doesn't stop working altogether is you tend to get a reduced download speed but still an increase in upload speed. While you may still be best of reverting to ADSL it is good that Dylan has faults checking the upload speed as that may be a separate issue.

P.S. I forgot about that modem bug. I guess it's a side affect of not being in front line support anymore.

Please note: I have a professional bias towards Vodafone.

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