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<div class="moz-cite-prefix">On 13/09/2013 11:33 AM, Matt Perkins
wrote:<br>
</div>
<blockquote cite="mid:52326B82.4000308@spectrum.com.au" type="cite">
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<div class="moz-cite-prefix">I think there are to many unknown's
to apply much of this type of logic to NBN2. The 100M/bit
question will be. <br>
<br>
Where will they put the "node". The most logical place will be
to knock over the pillars (big grey knob looking post) and put
the big green graffiti target in it's place. The Node will then
cover what was formally known as the "distribution area" (DA).<br>
</div>
</blockquote>
<br>
Knocking it over is likely to result in too long without any service
for many hundreds of people. Most proposals I've seen assume the
pillar itself stays, the node cabinet is installed beside it, and
100-pair cables from the MDF in the cabinet are run into the pillar,
replacing the main cables from the exchange. The customer pairs are
cross-connected within the pillar as normal.<br>
That's what they did in the UK, and the new regime seems to like to
follow the UK model in many things.<br>
<br>
<br>
<blockquote cite="mid:52326B82.4000308@spectrum.com.au" type="cite">
<div class="moz-cite-prefix"> <br>
If that's the case the direct main cable usually 300+ pairs
direct to the exchange will be superseded with the fiber &
node.</div>
</blockquote>
Yes.<br>
<br>
<br>
<blockquote cite="mid:52326B82.4000308@spectrum.com.au" type="cite">
<div class="moz-cite-prefix"> This higher density cable is where
most of the cross talk is seen usually. It's induced in these
cables but the root cause is usually impedance mismatch further
down the loop. With the higher density cable out of the picture
I think the cross talk will be decreased overall but the root
cause will still be there to cause havoc.<br>
</div>
</blockquote>
Vectoring fixes this.<br>
<blockquote cite="mid:52326B82.4000308@spectrum.com.au" type="cite">
<div class="moz-cite-prefix"> <br>
Nothing would be done further down the loop. It would work how
it works now best effort. Customer would go to dick smith and
get themselves a vdsl modem with POTS/VOIP port and that would
be that. Average speed would be <25M/bit with a the lucky
few <50M/bit <br>
</div>
</blockquote>
<br>
except the election promise was 25 Mbps minimum for all to begin
with, raising to 50 Mbps minimum for 90% of people after vectoring
is installed.<br>
I can see a lot of truckrolls to homes to install VDSL2-capable
central filters/splitters - BT in the UK also confirms that many of
the problems woith VDSL2 performance they've seen relate to in-home
cabling.<br>
Its still going to be a good time to be a registered cabling
contractor.
<br>
<br>
P.<br>
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