[AusNOG] VDSL2, was Re: 4G advances

[Matthew Moyle-Croft]

On 18/10/2012, at 6:13 PM, Glen Greig <glen at greig.net.au> wrote:

> Not true, Telstra has just rolled out over 1800 ISAMs (VDSL capable) in the form of Tophat.

The chassis are capable but:

1) VDSL2 uses a lot more power (and thus generates a lot more heat) than ADSL2+
2) VDSL2 lines cards are less dense (ports per card)
3) VDSL2 isn't ratified for use on the CAN
4) RIMs supply only a small %age of the population

So it's unlikely it's ever going to be doable even by Telstra.  It'd benefit a very small %age of the population unless you start rolling out stupidly large numbers of cabinets all just to eek a few more years out of the CAN.

The major problem with VDSL2 is that it's the end of the road for Cu.  It's as good as it's going to get.  Sure there are technologies to optimise a bit, there's pair bonding, but most residential in Australia is lucky to have one pair.

MMC

> 
> On Fri, Oct 19, 2012 at 11:02 AM, Mark Newton <newton at atdot.dotat.org> wrote:
> On Fri, Oct 19, 2012 at 12:52:12AM +0000, Mark Delany wrote:
> 
>  > So sure, maybe Telstra was stymied, but squirt-sized ISPs were never
>  > going to do a massive VDSL deployment without huge government or
>  > regulatory assistance.
> 
> No, but they might have said, "We're going to stop buying
> ADSL1/ADSL2/ADSL2+ DSLAM modules, and start buying ADSL1/ADSL2/ADSL2+/VDSL
> DSLAM modules for replacements and future deployments."
> 
> Alternatively, they might have said, "Here are bits of our market
> where we think we'll get more revenue out of VDSL, let's put it
> in those areas." (like they did with SHDSL)
> 
> What's actually happened is, "We're not going to buy anything at all."
> 
>   - mark
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