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Topic # 67558 3-Sep-2010 16:07
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According to the Telecom Wholesale maps I live in an area of Takapuna that is not going to be cabinetised, so I'm assuming I'm going to remain connected to the exchange.

From my modem my line stats are:

Line Rate: 11027/953 (Attainable: 13484/953)
Noise: 11.6dB/11.8dB
Attenuation: 25dB/12.6dB

I live in the upstairs part of the house. The demarcation point is outside one of the windows, and early last year I had a line put in from this point, so the jack is about 2 to 3 metres away from the demarc point. All that is connected is a modem, no other equipment.

Downstairs is a splitter that was installed a few years ago. It originally was for broadband and telephone, but right now it's just the telephone that's connected.

I sync at about 9.5Mb down and 0.80Mb up, but I've read that if you divide the attenuation rate by 13.81 it gives you an approximate distance from the exchange, which for me is about 1.8km so theoretically I should be able to sync around the 18Mb mark according to this: http://www.internode.on.net/residential/broadband/adsl/extreme/performance/

I know it's probably hard to answer, but based on what is known, would I likely see a benefit that would make spending the $200 worthwhile?

Then speaking generally, how would anyone know if it will be of benefit to them? Will it be gauged on the stats the modem is showing or would someone need to come to the house first and take a look at the wiring? 




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  Reply # 376409 4-Sep-2010 02:08
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I would say not worth it currently but it will be worth it when VDSL becomes available and you want to move to that. Your old master filter may not be rated for VDSL.

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  Reply # 376478 4-Sep-2010 09:25
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Ragnor: I would say not worth it currently but it will be worth it when VDSL becomes available and you want to move to that. Your old master filter may not be rated for VDSL.


VDSL would probably never be provisioned on line with stats like those above which are on the poor side.



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  Reply # 376479 4-Sep-2010 09:28
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Hi, your sync rate (13Mb/s) is not uncommon for a 1.8-2km run although I would have thought a little more, but you have to realise that noise due to other DSL users in the feeder your line is in can impact on this. Also note that the internode graph is based on a 6dB noise margin where as Telecom use a 12dB margin that drops things a bit, I would typically find a 2km line to give around the 12-15Mb/s mark, all depending on noise conditions.

You say the line comes from the demarc directly to your modem, and if I understand what you are saying the same line also splits from the demarc to downstairs where there is a splitter, is this correct or have I read it wrong. Ideally if it splits at the demarc in two directions regardless of which services are on which then I would more the filter to the demarc.

If you have a setup as suggested above then I doubt the SDP is of any use to you at all

Cyril



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  Reply # 376480 4-Sep-2010 09:34
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cyril7: You say the line comes from the demarc directly to your modem, and if I understand what you are saying the same line also splits from the demarc to downstairs where there is a splitter, is this correct or have I read it wrong.


Hi Cyril, yes this is exactly how it is set up.




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  Reply # 376483 4-Sep-2010 09:37
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Then there may be some benefit (no guarantees) in moving the filter to the demarc and having the voice side then split two ways (one to your area and the other to downstairs) and the direct line going just to the modem, which is how it should have been done, I am assuming the splitter downstairs is a wired in MM3200B rather than a inline filter.

Cyril



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  Reply # 376484 4-Sep-2010 09:41
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Yes it is a wired filter, not an inline one.




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  Reply # 376493 4-Sep-2010 10:07
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odd someone would have put the filter in a location other than the demarc when there is a split from the demarc on the inbound line side, this creates a line stub which can effect performance, is the demarc hard to access or something.

Cyril



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  Reply # 376494 4-Sep-2010 10:14
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Not really, it's directly above the front door at the top of the second storey so only requires a ladder to get to it. No other obstructions around.




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  Reply # 376495 4-Sep-2010 10:16
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Assuming its a white square ETP box at the demarc then the filter will fit in it (upside down) they were specifically dimensioned to fit in those boxs.

Cyril



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  Reply # 376498 4-Sep-2010 10:28
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Yep it's a small white box with the wires coming out of the top.




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