Dundas NSW - Have had three jobs at the one place since xmas including a
fire as the result of lightning - I recall there is another fellow on list
from the area maybe has similar stories - The process is annoying for the
FTTC (can be 5 days waiting, for a quick hardware replacement from the good
The DPUs being back-fed from the houses they provide service I’d suggest is the
main reason - ADSL modems just had the ADSL signal to contend with, whereas
back feeding power means you’ve got the DPU, with power across the 4 Cu lines
into the houses and the power grid in four houses connected to
On Friday 15th we had 30 FTTC NCDs "fried"
in a single 1km2 area due to an electrical storm.
No other devices were impacted in the affected households and
damage occurred irrespective of whether NCDs were plugged to
surge protectors or not.
It seems unlikely that lightning hit lead-ins for the
af
Yeah, I'd say that's a good bet.
Aerial lead-ins are always going to be more susceptible to induced
spikes from nearby lightning than buried cable.
On Fri, Jan 22, 2021 at 11:30 AM wrote:
>
> On Friday 15th we had 30 FTTC NCDs "fried"
> in a single 1km2 area due to an electrical storm.
> No othe
I wonder if it has anything to do with the old legacy copper that was
previously hooked up to the DPUs, which the NCDs trigger a cutover from.
There could potentially be rather a lot of it there, not necessarily
grounded if the old legacy infrastructure has been partially removed, so an
induced cur
All of the DSLAMs that Australian carriers are throwing in the bin right
now have $20 gas-discharge lightning arrestors on every port to comply with
TEBA rules around LSS connections.
I imagine that FTTC has no such requirement because there is no expensive
voice exchange to protect.
Underground
On Fri, 22 Jan 2021, John Edwards wrote:
Underground copper is probably more vulnerable than aerial to lightning.
Lightning strikes the ground, not the copper, but a voltage gets induced
in the copper due to the nearby electromagnetic charge - something that
doesn't happen in air because it'
Yes it really is that bad. Word is they are replacing thousands of NTD's
every week. It appears the design adopted is very sensitive to potential
difference from induced current flows over relatively short cable lengths.
Faster Cheaper Better. Thanks Malcolm.
Matt
On 22/1/21 11:30 am, m...
I don't know if it's related, but last weekend we had a NBN FttC
device fail following a storm, but it was the DPU in the street, not
the NTD. There was power loss, but no lightning in the immediate area.
They said due to equipment shortages it'd be 3 days for a replacement,
but it was there the ne
