VDSL Requirements and Wiring

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aussiedean

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#79352 16-Mar-2011 16:50

Hi there,

I have a brother in NZ in a VDSL area and resides less than a one kilometer from the cabinet. I have checked the Telecom Wholesale site which indicates he is within the "zone" and shows it is available in his area.

So the next question is when are the plans from Xtra expected to roll out. He is currently on a Business plan and would like to take the next step up to VDSL but it all seems a bit far away yet. Even ringing Telecom asking about VDSL results in we can't give you a date as yet?

Which brings me to the next question, obviously new equipment is required to take full advantage of the new offering so is home wiring going to be included in the install? I would be thinking not but would like to know in case there is a need to organise our own wiring. Also recommended data cable would be Cat 6? Just in case we get some installers that want to install something lesser like Cat 5.

Just on that Data techs in the West Auckland area. Would anyone have any recommendations please. The current residence has one line into the house but separate line for business office. I have recommended a splitter be installed and dedicated line for the VDSL connection.

Any help or advise greatly appreciated.

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#448956 16-Mar-2011 17:08

aussiedean:

I have a brother in NZ in a VDSL area and resides less than a one kilometer from the cabinet. I have checked the Telecom Wholesale site which indicates he is within the "zone" and shows it is available in his area.

So the next question is when are the plans from Xtra expected to roll out. He is currently on a Business plan and would like to take the next step up to VDSL but it all seems a bit far away yet. Even ringing Telecom asking about VDSL results in we can't give you a date as yet?

They've been trialling it for ages, retail plans were supposed to be coming out around now. I suspect the Christchurch earthquake has thrown a spanner in the works and critical other stuff is the focus.

aussiedean:

Which brings me to the next question, obviously new equipment is required to take full advantage of the new offering so is home wiring going to be included in the install? I would be thinking not but would like to know in case there is a need to organise our own wiring. Also recommended data cable would be Cat 6? Just in case we get some installers that want to install something lesser like Cat 5.

Availability of consumer VDSL modems is extremely poor atm, likely ISP's will be supplying them to begin with. Most likely the same Alcatel cellpipe that is being used by people trialling VDSL.

Cat5e or Cat6, the difference is minimal for home use. Cat5e is usually a lot cheaper.

TCF has guild lines for structured cabling, though you might not be able to go to this extent on an existing place easily:
http://www.tcf.org.nz/content/c23a4073-6db3-4970-8dc7-3e8e238f517a.cmr

aussiedean:

Just on that Data techs in the West Auckland area. Would anyone have any recommendations please. The current residence has one line into the house but separate line for business office. I have recommended a splitter be installed and dedicated line for the VDSL connection.

The physical phone line to the house will usually have two pairs of wires, two lines, in most houses the 2nd pair simply isn't used.

Do you have phone and adsl on both lines (home) and business?

aussiedean

65 posts

Master Geek

#449002 16-Mar-2011 18:50

I'm in Australia so not entirely sure but I'm picking the one phone line only which has normal phone service - split off to an ADSL connection and Sky.

The other pair for Business ADSL in Office running static IP.

sbiddle

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#449027 16-Mar-2011 21:01

Just be aware that the availability of VDSL2 doesn't mean that you're capable of getting the service. Being close to ~1km from a cabinent puts you on the outer fringes of cabinet coverage - over 50% are within 500m and virtually everybody is within 1km.

While 900m will still give you great ADSL2+ speeds it won't necessarily give great VDSL speeds and with Telecom delivering guaranteed speeds they won't do an install unless the line meets certain criteria. It is possible that you could fall outside this criteria.

In terms of requirements a VDSL2 rated master splitter is the only one and it's highly likely there will probably be no self installs. ISP's are all supplying modems at present.

cyril7

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#449039 16-Mar-2011 21:39

Hi, VDSL2 will work well on the Telecom network out to the 500-600m mark, I have seen good results in that region.

As for cabling cat3 cabling is what these technologies are designed for, so if you provide better (typically Cat5e) then all good, but reality is that 500m of cat3 cable in the Telecom network can not be helped by the last 40m of cat6 or cat7 within your home, lets get a grip!!!

If you want to make good of VDSL2 then the distance to your local ISAM (exchange or cabinet) is important, Telecoms wholesales maps details the areas that match a line loss area that should perform with VDSL2.

Cyril

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#449043 16-Mar-2011 21:44

Are the dedicated jack-point installs that the likes of Chorus do done with VDSL2 in mind or still just ADSL2+ ?

cyril7

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#449046 16-Mar-2011 21:49

VDSL2 is just a little more demanding, but in the end all you need is a normal DSL filter install using a VDSL2 compatible filter that is similar to the ADSL2+ one but rated through to 30MHz.

So yes a VDSL2 or even ADSL2+ connection should have a single central filter with suitably designed house cabling, period.

Cyril

aussiedean

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#449215 17-Mar-2011 13:07

Thanks for the input guys. Have just had another look at the Telecom Wholesale site and they have posted a new date of June 11.

As you can see the residence is about the middle of the vdsl zone and the cabinet is located at the end of the Waimoko Glen road. The house would be under the 1 kilometer mark I would say.

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cyril7

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#449221 17-Mar-2011 13:21

Hi, according to google maps and its measuring tool, Waimoko Glen Rd is around 400m in total length. The VDSL2 (green) area is based on calculations of a similar nature and with Telecoms knowledge of the cable run, plus based on ADSL2 attenuation figures of current services.

Regardless that property should have good VDSL2 service, as you are aware no one is too sure when plans will be made public, but its likely to be in the next couple of months based on the rumblings I hear.

Just to recap on your original post, cat5 is perfectly fine for VDSL2, dont forget that there is a few hundred meters of multipair cable in the street thats cat3 or less rated. There are approved VDSL2 filters that are in the same physical format as specificed by Chorus, who will insist that one is installed and a dedicated socket used.

Cyril

aussiedean

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#449317 17-Mar-2011 18:07

Thanks very much for the info, very helpful indeed.

powerforce

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#449514 18-Mar-2011 10:58

i forget where i read it, but i read that VDSL requires a line attenuation of around or less then about 10db mark.
so as others have said, i believe only the "cleanest" lines will be able to get it in the not too distant future.

coffeebaron

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#449555 18-Mar-2011 13:06

aussiedean: Just on that Data techs in the West Auckland area. Would anyone have any recommendations please. The current residence has one line into the house but separate line for business office. I have recommended a splitter be installed and dedicated line for the VDSL connection.

Any help or advise greatly appreciated.

I can do data / phone wiring etc. So send me a message when ready to look into this further.

Thanks
Fraser

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aussiedean

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#449667 18-Mar-2011 16:11

powerforce: i forget where i read it, but i read that VDSL requires a line attenuation of around or less then about 10db mark.
so as others have said, i believe only the "cleanest" lines will be able to get it in the not too distant future.

I will check his line stats when possible but as cyril7 has mentioned above he is probably no more than 500 mtrs from the cabinet so shouldn't be too bad.

aussiedean

65 posts

Master Geek

#449672 18-Mar-2011 16:22

I can do data / phone wiring etc. So send me a message when ready to look into this further.

Thanks
Fraser

Thanks for that Fraser will pass the info on for you.

Not sure how you would install a splitter in this situation but currently the house has one pair for the main house phone line that has an ADSL connection and Sky attached.

The other pair splits off at some point to supply another Business Class ADSL connection separate to the main house line.

I have suggested keeping the Office pair totally isolated from the House ADSL due to the fact that it has multiple phone points an ADSL connection and sky as well.

In a situation like this would the Office have its own splitter to avoid any interferance from the other line?

Anyway as mentioned will pass the info on.

Thanks again for your input chaps ....... cheers

aussiedean

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#450377 21-Mar-2011 13:51

Line Stats

Mode: ADSL_2plus

Downstream

SNR Margin (0.1 dB):      124

Attenuation (0.1 dB):     90

Attainable Rate (Kbps): 19908

Bit different to my Bilion readout but I would be thinking that is an SNR of 12.4 say and Att of 9.0 which would be right considering his distance from the exchange.

Current connect speed was 16898 Down 1021 Up

cyril7

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#450378 21-Mar-2011 13:54

Hi, I would expect you should be good to go on VDSL2 having 9dB attenuation.

Cyril

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