<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On 18/10/2012, at 6:13 PM, Glen Greig <<a href="mailto:glen@greig.net.au">glen@greig.net.au</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Not true, Telstra has just rolled out over 1800 ISAMs (VDSL capable) in the form of Tophat.<br></blockquote><div><br></div><div>The chassis are capable but:</div><div><br></div><div>1) VDSL2 uses a lot more power (and thus generates a lot more heat) than ADSL2+</div><div>2) VDSL2 lines cards are less dense (ports per card)</div><div>3) VDSL2 isn't ratified for use on the CAN</div><div>4) RIMs supply only a small %age of the population</div><div><br></div><div>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.</div><div><br></div><div>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.</div><div><br></div><div>MMC</div><br><blockquote type="cite"><br><div class="gmail_quote">On Fri, Oct 19, 2012 at 11:02 AM, Mark Newton <span dir="ltr"><<a href="mailto:newton@atdot.dotat.org" target="_blank">newton@atdot.dotat.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>On Fri, Oct 19, 2012 at 12:52:12AM +0000, Mark Delany wrote:<br>
<br>
> So sure, maybe Telstra was stymied, but squirt-sized ISPs were never<br>
> going to do a massive VDSL deployment without huge government or<br>
> regulatory assistance.<br>
<br>
</div>No, but they might have said, "We're going to stop buying<br>
ADSL1/ADSL2/ADSL2+ DSLAM modules, and start buying ADSL1/ADSL2/ADSL2+/VDSL<br>
DSLAM modules for replacements and future deployments."<br>
<br>
Alternatively, they might have said, "Here are bits of our market<br>
where we think we'll get more revenue out of VDSL, let's put it<br>
in those areas." (like they did with SHDSL)<br>
<br>
What's actually happened is, "We're not going to buy anything at all."<br>
<span><font color="#888888"><br>
- mark<br>
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