VDSL Max Distance From Cabinet

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myfullflavour

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#116693 7-May-2013 10:20

Keen to hear from anyone who has got a VDSL connection successfully working from a distance of 900m or more (from the cabinet).

Got a customer who is beyond the 900m mark but their line noise is in the 9-10 range. Keen to see how they benchmark against similar connections.

plambrechtsen

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#812612 7-May-2013 10:40

I would say at 900Meters you're doing pretty ok to attempt VDSL2

A lot would depend on the copper in the ground and that greatly varies between geographical location in NZ.

Run a prequal, run a test in SPM for their ADSL line. If it looks ok and they aren't getting any major binning across the spectrum and they are still getting at least 6mb at 500... Then you should be sweet.

JohnButt

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#812630 7-May-2013 10:52

Interesting result after a quick look:

My home office probe is exactly 900m :-)

Note, this is from a quick pivot table and some spots may be the AVERAGE of two or more probes.

Talkiet

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#812646 7-May-2013 11:07

How are you getting distance from your subscriber to cabinet John?

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

JohnButt

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#812650 7-May-2013 11:13

With a bit of help from Chorus, but not as accurate as I would like, I desperately need a way to update it if a cabinet is introduced or boundaries change.

Specifically, I use the road distance once I identify the location of the appropriate cabinet. Mostly likely to be accurate, my background is in cabinet engineering which helps interpretation. However I have no idea of the copper grade - 0.4, 0.5, 0.63 or 0.9mm and this makes a very large difference, more than distance. I have to assume all are the same - most will be 0.5.

It would be best to have calculated attenuation.

myfullflavour

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#812702 7-May-2013 12:00

We've got a client 1.3KM away from the exchange - download 30, upload 9.5.

Behodar

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#812726 7-May-2013 12:26

myfullflavour: We've got a client 1.3KM away from the exchange - download 30, upload 9.5.

Ooh. I might look into this when I get home because I'm about that far from the cabinet and I'd love to have those speeds!

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seatil

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#812746 7-May-2013 12:53

Interesting graph. I had been wondering what we might reasonably expect to receive at our new place. It seems that there's an awful lot of variation, including that rather anomalous point that manages a whopping 3.5Mbps @440m. :D

The speed figures - are those sync rates, or actual measured throughput?

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JohnButt

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#812775 7-May-2013 13:17

The speed figures are actual measured speeds.

The variation is partly due to faulty connections - we chase these down with the volunteer concerned, and partly due to the real world including but not limited to:
* Copper grade (diameter of the copper wires in your street cable)
* DSL working pairs in your cable causing interference
* house wiring

plus many more factors. You could look at the top of the envelope and consider that the peak capability. although I would need to run it again to separate any dual spots to be sure.

Stan

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#813168 7-May-2013 19:23

I am looking forward to seeing my attenuation when I move into my brand new house.
Its around 200m from the cabinet by apparently chorus think my attenuation will be somewhere around 20-22db

plambrechtsen

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#813286 7-May-2013 21:17

Stan: I am looking forward to seeing my attenuation when I move into my brand new house.
Its around 200m from the cabinet by apparently chorus think my attenuation will be somewhere around 20-22db

I would hope not... unless you have REALLY poor wiring in your house, or poor copper in the street.

coffeebaron

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#813311 7-May-2013 21:51

plambrechtsen:
Stan: I am looking forward to seeing my attenuation when I move into my brand new house.
Its around 200m from the cabinet by apparently chorus think my attenuation will be somewhere around 20-22db

I would hope not... unless you have REALLY poor wiring in your house, or poor copper in the street.

or the copper goes up the street and back

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#813326 7-May-2013 22:13

plambrechtsen:
Stan: I am looking forward to seeing my attenuation when I move into my brand new house.
Its around 200m from the cabinet by apparently chorus think my attenuation will be somewhere around 20-22db

I would hope not... unless you have REALLY poor wiring in your house, or poor copper in the street.

Should not be its a brand new subdivision and a brand new house with cat 5e. I suspect chorus is incorrect but move in is on the first so I will soon find out :)
The street is only 130m long and the house 4 down can get it with 5db attenuation according to Chorus
Anyway a tad ot