[AusNOG] VDSL2, was Re: 4G advances

Glen Greig glen at greig.net.au
Fri Oct 19 12:42:35 EST 2012

Sorry, I didn't mean to imply that Telstra had any intention on rolling out
VDSL, it was mealy a response to "not going to buy anything at all", there
is still investment happening in the CAN. The VDSL comment was simply

On Fri, Oct 19, 2012 at 11:22 AM, Matthew Moyle-Croft <mmc at mmc.com.au>wrote:

> 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.
> 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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