[AusNOG] Long live the NBN. The NBN is dead?! [personal]
Tim McCullagh
technical at halenet.com.au
Wed Aug 11 10:43:59 EST 2010
----- Original Message -----
From: "Paul Brooks" <pbrooks-ausnog at layer10.com.au>
> Forget about the magic 100Mbps for the moment - in the context of the
> non-plan outlined yesterday, they will have enough trouble reaching the
> 12 Mbps "minimum peak" threshhold.
>
> Who remembers where the magic 12 Mbps threshold comes from?
> It was first outlined in Telstra's ADSL2-based FTTN proposal at their
> technology briefing in November 2005, and released as an ASX announcement.
> They proposed spending ~$3.1B to deploy FTTN - active fibre-fed cabinets
> - to shorten the maximum copper line length to around 1.5 km.
>
> As it happens, 12 Mbps is the ADSL speed that can be guaranteed at a
> copper loop distance of 1.5km, under worst-case mutual interference from
> nearby DSL lines.
> Since then, 12 Mbps has been used as the 'magic benchmark' - not
> because of any analysis that indicates this is sufficient for any
> purpose, or is some sort of inflexion point on a
> economic-benefit-to-the-nation curve, but because it is doable with DSL.
>
>
> So...Telstra calculated $3.1 bn required to bring 12 Mbps to around 4
> million homes in the 5 capital cities - less than 50% of the population.
>
> The coalition apparently plans to spend ~$2.7 bn to bring 12 Mbps min
> line speed to 97% of the population, without mentioning FTTN or what
> proportion of the 97% would be served by copper (where they only budget
> ~ $750 million compared to Telstra's $3.1billion ) and the remainder by
> some new fixed wireless networks.
>
> This 'policy' appears to be badly thought out back-of-envelope numbers
> that simply doesn't add up.
>
What absolute rubbish. I find it difficult to make such a statement when
the details of what is being proposed is not clear at this time.
The coalitions annoncement is no more a back of the envelope than the NBN
mark 1 2 3 etc.
The issue that is being overlooked is that there have been some new
developments in DSL and cable technologies and just perhaps the coalition
has been talking to some carriers that have suggested they they can get more
than 12 Mbps out of existing infrastructure. I would suggest the 12 Mbps
that the coalition are referring to is based on some Wimax fixed wireless or
LTE information they have been given and or that relates to the so called
sat speed under the current NBN proposal which is to be deployed in regional
areas. Without the details of the coalition plan it is difficult to say what
they are proposing. It is also difficult to make the assertions above as
well.
It is worth pointing out that Telstra has 100Mbps on the cable network in
Melbourne, but the take up has been low and doesn't justify the roll out in
other cities. Until such time as there is some well researched analysis of
customer demand and price curves then I can't see any reason why the
government via NBNco should overbuild 2 cable networks in the capital cities
and a functioning DSL network without some real justification. I don't
call feeding consultants justification, and most if not all the support I am
seeing for NBN is coming from such groups, I certainly am not seeing it from
my customer base, that is the ones that have to pay for it.
The real test should be to ask those proposing NBN ftth whether they sign
the front of the cheque or the back. We should discard all those replies
that sign the back due to conflict of interest, then we will have a clear
idea as to the real demand, and I would suggest the numbers supporting NBN
will be much lower. That noisy minority always seem to think they are or
represent the majority
If the government has money to risk it should go on doing something about
sorting out how to put more water into the murry darling basin (bradfield
scheme). Now there is a name of a man with a vision Google bradfield
scheme. Now that is a project that would make a difference, it is not
overbuilding existing water projects and there is a need. Inland rail is
another scheme to get the trucks off the highways. Fix up out ports
infrastructure so that we can as a nation export more products and earn an
income as a nation, just to name a couple of alternative uses for such
funds. Each of these would have a far larger impact on Australian then
stringing fibre up on power poles (dumb idea) to replace a network that
already functions and is underground. It is a similar arguement to that of
replacing your car with a new one every year becasue it will go faster even
though the need hasn't changed you can still only drive at the speed limit
which hasn't changed. We don't do this and our 2 3 or 4 year old cars all
do the same job.
regards
Tim
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