How on earth did I get VDSL with this kind of attenuation?

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Gordy7

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#1185772 30-Nov-2014 14:49

Hi

I was a bit disappointed not to get VDSL. Spark reckoned I could but Chorus said no.

Here are my stats, BB map and Chorus cabinet map.

Looks like I might be on an exchange and 4 houses too far from a cabinet.
I am about 550m as the crow flies from a cabinet.
My overhead line appears to head towards the cabinet, but I understand that phone lines can take very tortuous routes.

Click on these thumbnails for a better view:

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

hio77

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#1185773 30-Nov-2014 15:03

Its a funny thing really, some real high attenuation lines get through, others dont.

You may be 550M from the cabinet, but going by your attenuation, your cable length is much longer.

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Gordy7

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#1185775 30-Nov-2014 15:19

It is interesting that when I do a cable length estimate based the 16dB ADSL download line atten I get 1.2km.
Using:
http://www.kitz.co.uk/adsl/max_speed_calc.php

When I do a GIS road distance measurement from my place to the exchange I get 1.04km... pretty close match.

Here is my GIS route thumbnail.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

Jase2985

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#1185776 30-Nov-2014 15:23

yep your on an exchange from the looks of it an outside the distance for VDSL. Not much you can do about it.

the white line is generally the border between the different cabinet/exchange areas

Gordy7

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#1185782 30-Nov-2014 15:28

Jase2985: yep your on an exchange from the looks of it an outside the distance for VDSL. Not much you can do about it.

the white line is generally the border between the different cabinet/exchange areas

I guess it would be quite expensive to get Chorus to re-route overhead lines.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

Jase2985

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#1185787 30-Nov-2014 15:31

they wont do it

you are stuck with what you have. you should have OK ADSL2 though

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Gordy7

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#1185793 30-Nov-2014 15:45

Jase2985: they wont do it

you are stuck with what you have. you should have OK ADSL2 though

ADSL2 here 12.3/0.8 Mbps.
I could do with better upload speed.

Problem with this whole exercise is that I have been hitting my Spark 40GB data cap. ($75/m).

To go to ADSL 80GB cap will cost $95/m.

To go to VDSL 80GB cap will also cost $95/m.

Thought it might be worth upgrading to the faster DSL at the same time.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

pjamieson

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#1185892 30-Nov-2014 19:32

sbiddle: The 10.8dB limit went a long time ago. Now pretty much anything goes.

Incorrect

plambrechtsen: Your VDSL Attenuation will be approximately 2.5X higher than your ADSL attentuation. Since the frequency bandwidth is much higher than with ADSL.

This^ - I'm seeing lots of people report their post VDSL Att, and not being aware of the pre-qual results, thinking the 10.8 rule is being ignored.

plambrechtsen

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#1185900 30-Nov-2014 19:49

pjamieson:
sbiddle: The 10.8dB limit went a long time ago. Now pretty much anything goes.

Incorrect

plambrechtsen: Your VDSL Attenuation will be approximately 2.5X higher than your ADSL attentuation. Since the frequency bandwidth is much higher than with ADSL.

This^ - I'm seeing lots of people report their post VDSL Att, and not being aware of the pre-qual results, thinking the 10.8 rule is being ignored.

Cheers.. (yet I get no +1's :(... )

I'm 1.2km or so from the exchange and have 14mb connect rate with my own installed Master Filter. Looking like I get UFB in 2017/8 and I have built the new broadband subscriber management stack at Spark. So unfortunately I too am in the dead zone between exchange and cabinets. It's just the way it is.

No chance of VDSL. As technically at my distance it's the sweet spot of where adsl and vdsl sync at the same rate. Further away and your vdsl speeds rapidly deteriorate to nothing.

There is a fun tool at our lab that can set the cable distance electronically and do all sorts of other fun things. And yes above 900 meters go south quickly. So there is good reasons why things are the way they are.

pjamieson

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#1185922 30-Nov-2014 20:38

Multiple +1's added! :)

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