ADSL2 and VDSL

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barf

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Topic # 7736 5-May-2006 19:55

it looks like there are some new, competing standards here... a friend of mine tried to tell me that VDSL was the future yesterday.
but I had to argue ;-) VDSL is extremely short range, and i dont think it can be seriously considered, except maybe in new subdivions.
ADSL2 however extends on RADSL's range. it looks pretty cool.

there are some whitepapers here:
http://www.aware.com/products/dsl/whitepapers.htm

what do you guys think is a better standard?

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DonGould

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Reply # 35046 5-May-2006 21:12

barf: what do you guys think is a better standard?

Strikes me that they're different standards with different applications.

Why do you ask which one we think is better?

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bradstewart

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Reply # 35066 6-May-2006 01:10

DonGould:Why do you ask which one we think is better?

Im going to go ahead and assume it was for the purpose of discussion.

From what i've read on VDSL it does have very short rnage and given the problems that many are already facing due to distance from the exchange ADSL2+ is the path to take. Of course Telecom have already announced they are taking that route.

VDSL has theoretical limits of 52/12Mbps but within 1500m of exchange that is down to 24Mbps. To roll that out in NZ where many people live 2 or more km form the exchange you would having people complaining that thier 52Mbps service was only around 10Mbps.

ADSL2+ is also hampered by short range but not to the same extent as VDSL

Fraktul

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Reply # 35212 8-May-2006 19:46

Yes I would think its quite obvious that the suitablity for each standard is largely based on the population density and average local loop distance in the country/region in question.

juha

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Reply # 35218 8-May-2006 22:08

VDSL is now cheap to implement, but mainly useful for situations like a block of residential housing where you can put a fibre-fed DSLAM in the basement so as to provide high-speed networking over existing copper wiring in the house. Could work nicely in parts of say Auckland CBD but not perhaps so good in suburbia.

One of the advantages of ADSL2+ is actually that it provides better performance over the same reach, up to a certain distance, than first generation DSL. That said, the high bitrates are only available over close distances, hence Telecom's "cabinetisation" of the network.

Makes me wonder if it wouldn't be better to just bite the bullet and go FTTH straight off. Probably be a fair bit more expensive still.

Juha

tonyhughes

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Reply # 35242 9-May-2006 08:26

juha: bite the bullet and go FTTH straight off. Probably be a fair bit more expensive still.

For those lurkers who dont know, FTTH is Fiber To The Home.

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bradstewart

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Reply # 35245 9-May-2006 08:37

Have to admit i didnt know that. So many damn acronyms around here.......

Fraktul

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Reply # 35255 9-May-2006 09:16

Granted fiber is more expensive and harder to run but the cost is still mostly made up by civils. All new developments should have FTTH IMHO.

juha

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Reply # 35256 9-May-2006 09:20

Fraktul: Granted fiber is more expensive and harder to run but the cost is still mostly made up by civils. All new developments should have FTTH IMHO.

Last time I looked, single-mode is $4 per metre but all the RMA crapola can add $100-$150 easily on top. Now that's something the government needs to sort out quickly.

Juha