<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">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 the NTDs all being electrically connected for power (Potentially (Ha!) across 3 phases).<div class=""><br class=""></div><div class="">So a lightning strike that hits a power pole nearby is likely to fry a lot of stuff.</div><div class=""><br class=""></div><div class="">Reality is, FTTC is just a way of delaying spending money on fibre. To build FTTC NBN are building a GPON network already, just using Cu into the house. (It’s a very NPV friendly way of deploying, delaying capex is always a winner there).</div><div class=""><br class=""></div><div class="">MMC<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 21 Jan 2021, at 10:34 am, Jrandombob <<a href="mailto:jrandombob@darkglade.com" class="">jrandombob@darkglade.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Yeah, sounds to me like the NTDs just aren't very well designed.<br class=""><br class="">Even in a high lightning area, as Damien said previously, if anything FTTC ought to be LESS susceptible (assuming of course the devices are well designed) to lightning owing to the shorter cable runs.<br class=""></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jan 21, 2021 at 10:50 AM Paul Julian <<a href="mailto:paul@fivejay.com.au" class="">paul@fivejay.com.au</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-AU" class=""><div class="gmail-m_2002214641581563991WordSection1"><p class="MsoNormal"><span class="">As somebody who lives in one of the areas that gets affected a lot, and that the article was mostly written about I believe, I can tell you that there are a lot more NTD’s getting damaged than there was ADSL modems.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">I can’t explain it either, it shouldn’t be happening, however people with surge protected power boards are copping it as well, it’s like it’s coming through the copper, maybe due to the nature of the DPU and other people connected, perhaps it’s transiting the DPU and damaging other NTD’s, I don’t know, but the DPU’s seem to be unaffected, only NTD’s, so it could be a design issue.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">I don’t use NBN myself, however our local facebook page lights up whenever there is a storm approaching or upon us, with people talking about unplugging NTD’s etc. and then of course afterwards when people complain about no internet, and then the complaints that it’s taken NBN 5 days to get there and replace it </span><span style="font-family:"Segoe UI Emoji",sans-serif" class="">😊</span><span class=""><u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">Many people have been told by the provider that NBN is looking at NTD’s which handle power spikes better, I don’t know what they are actually doing but that’s what people are being told.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">The NBN techs will also not leave spare equipment, this makes sense of course, but I know the question has been asked many times in our community.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">I believe the article came about due to many people complaining to local MP’s about the issues and obviously the media has picked it up as well.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">Regards<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class="">Paul<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><div class=""><div style="border-color:rgb(225,225,225) currentcolor currentcolor;border-style:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm" class=""><p class="MsoNormal"><b class=""><span lang="EN-US" class="">From:</span></b><span lang="EN-US" class=""> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" class="">ausnog-bounces@lists.ausnog.net</a>> <b class="">On Behalf Of </b>Brendan Ord<br class=""><b class="">Sent:</b> Thursday, 21 January 2021 10:36 AM<br class=""><b class="">To:</b> Damien Gardner Jnr <<a href="mailto:rendrag@rendrag.net" target="_blank" class="">rendrag@rendrag.net</a>><br class=""><b class="">Cc:</b> <a href="mailto:ausnog@ausnog.net" target="_blank" class="">ausnog@ausnog.net</a> <<a href="mailto:ausnog@lists.ausnog.net" target="_blank" class="">ausnog@lists.ausnog.net</a>><br class=""><b class="">Subject:</b> Re: [AusNOG] Lightning and FTTC - is it really this bad?<u class=""></u><u class=""></u></span></p></div></div><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal"><span class="">Damien, I agree with you. Lightning is going to be causing the same issues it always caused regardless of the technology; telegram, POTS, ADSL or VDSL from the curb or cabinet – nothing’s changed because there’s still copper conductors in the ground.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">I smell a lot of agenda pushing and bias in this article and that’s about all it is.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span class="">Although, maybe a more important topic mentioned in the article – NBN won’t allow these businesses to buy a cold spare?!?<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><table style="width:337.5pt" width="450" cellspacing="0" cellpadding="0" border="0" class=""><tbody class=""><tr class=""><td style="padding:0cm" class=""></td></tr><tr class=""><td style="padding:11.25pt 0cm 7.5pt" class=""><p class="MsoNormal" style="margin-bottom:12pt;line-height:12pt"><b class=""><span style="font-size:11.5pt;color:rgb(236,89,26)" class="">Brendan Ord</span></b><u class=""></u><u class=""></u></p></td></tr></tbody></table><p class="MsoNormal"><u class=""></u> <u class=""></u></p><p class="MsoNormal"><span class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><b class=""><span lang="EN-US" class="">From:</span></b><span lang="EN-US" class=""> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank" class="">ausnog-bounces@lists.ausnog.net</a>> <b class="">On Behalf Of </b>Damien Gardner Jnr<br class=""><b class="">Sent:</b> Thursday, 21 January 2021 9:11 AM<br class=""><b class="">To:</b> Troy Kelly <<a href="mailto:troy@troykelly.com" target="_blank" class="">troy@troykelly.com</a>><br class=""><b class="">Cc:</b> <a href="mailto:ausnog@ausnog.net" target="_blank" class="">ausnog@ausnog.net</a> <<a href="mailto:ausnog@lists.ausnog.net" target="_blank" class="">ausnog@lists.ausnog.net</a>><br class=""><b class="">Subject:</b> Re: [AusNOG] Lightning and FTTC - is it really this bad?<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p><div class=""><p class="MsoNormal">Yeah it really didn’t make sense to me. How is a product which only has a TINY bit of copper compared to FTTN and indeed the older POTS network, SO much more susceptible to lightning strikes? I mean, it’s Fibre to the pit, and then one breakout box is running four(?) homes, with maybe 100-150m total of copper between all four homes’ runs? Unless lightning is hitting one of those houses, or the people in those houses are stupid enough to NOT be running surge protection on their gear (seriously, wtf? Are there really people without surge protection these days? It’s been around for 30 years, and is on almost every power board Bunnings sell..), I don’t see how lightning can be an issue??<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">Something doesn’t make sense here..<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">—DG<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p><div class=""><div class=""><p class="MsoNormal">On Thu, 21 Jan 2021 at 8:25 am, Troy Kelly <<a href="mailto:troy@troykelly.com" target="_blank" class="">troy@troykelly.com</a>> wrote:<u class=""></u><u class=""></u></p></div><blockquote style="border-color:currentcolor currentcolor currentcolor rgb(204,204,204);border-style:none none none solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;margin:5pt 0cm 5pt 4.8pt" class=""><div class=""><div class=""><p class="MsoNormal">Yes Mark, I've heard of it ;)<u class=""></u><u class=""></u></p></div><div class=""><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div></div><div class=""><p class="MsoNormal">I guess my point was - why is (is it?) FTTC somehow apparently more susceptible to discharge issues than POTS was/is. Perhaps I am getting the wrong impression from the article.<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div></div><div class=""><div class=""><div class=""><p class="MsoNormal"><b class="">Regards, Troy</b><u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal">Brevity is the elixir of life.<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><span style="font-size:7.5pt" class="">Father Hector McGrath, Pixie 2020</span><u class=""></u><u class=""></u></p></div></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal">On Wednesday, 20 January 2021 10:15 PM, Mark Smith <<a href="mailto:markzzzsmith@gmail.com" target="_blank" class="">markzzzsmith@gmail.com</a>> wrote:<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><blockquote style="margin-top:5pt;margin-bottom:5pt" class=""><div class=""><div class=""><p class="MsoNormal">Heard of ADSL? POTS?<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">If the Internet was only meant to run over fibre, there wouldn't have been any ARPANET or Internet before the late 1980s or early 1990s.<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">Fun fact, RFC1 was written on a typewriter in a bathroom in 1969, because Steve didn't want to disturb his flatmates.<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal"><a href="https://tools.ietf.org/html/rfc1" target="_blank" class="">https://tools.ietf.org/html/rfc1</a><u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal">BCP89.<u class=""></u><u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div><div class=""><p class="MsoNormal"><u class=""></u> <u class=""></u></p></div></div></blockquote></blockquote></div></div></div></div>_______________________________________________<br class="">
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