-48VDC is extremely reliable, we have also never had a power incursion on our DC plant. Any of them.
I’m not sure I’d consider it cheap, but it’s not horrifying expensive and it *works* when you deploy enough of it in a 2 or 3N fashion. -Ben > On Dec 28, 2019, at 9:04 AM, Baldur Norddahl <baldur.nordd...@gmail.com> > wrote: > > > What is wrong with lead acid battery backup? Seems to be exceedingly stable > from my experience. We have all our equipment on -48V DC and have never had a > power interruption at any site. > > The requirements here are 48 hours of backup by law. Telecom is declared to > be part of emergency and defense, so they put in a requirement for > resilience. > > Regards > > Baldur > > > tor. 26. dec. 2019 11.33 skrev Joe Maimon <jmai...@jmaimon.com>: >> Unless telecom infrastructure has been diligently changing out the lead >> acid battery approach at all their remote terminals, powered gpon, hfc >> and antennae plants will never last more than minutes. If at all. >> >> A traditional car has between a 100-200amp alternator @12volts >> >> How much generating capacity can you get out of a typical hybrid? >> >> Self-isolating and re-tieing inverters. Economic household ATS systems. >> Do those exist? >> >> Enough independent distributed capacity and now comes the ability to >> create grid islands. How might that look? >> >> Electric grid shortage is likely coming to NYC, courtesy of folk of >> certain political persuasion and their love of stone age era living. IP >> decommissioning. >> >> If you have CO loop copper, keep it. >> >> Joe >> >> Don Gould wrote: >> > This is a very short term problem. >> > >> > The market is going to fill with battery storage sooner rather than >> > later. >> > >> > Solar is just exploding. >> > >> > Your car will "house tie". >> > >> > 6G will solve your data problem. >> > >> > D >> > >> > >> > >> > -- >> > Don Gould >> > 5 Cargill Place >> > Richmond >> > Christchurch, New Zealand >> > Mobile/Telegram: + 64 21 114 0699 >> > www. <http://www.tusker.net.au/>bowenvale.co.nz >> > >> > >> > >> > -------- Original message -------- >> > From: Michael Thomas <m...@mtcc.com> >> > Date: 26/12/19 2:33 PM (GMT+12:00) >> > To: nanog@nanog.org >> > Subject: power to the internet >> > >> > >> > https://www.politico.com/news/2019/12/25/california-power-shutoffs-089678 >> > >> > >> > This article details some of the issues with California's "new reality" >> > of planned blackouts. One of the big things that came to light with >> > these blackouts is that our network infrastructure's resilience is >> > pretty lacking. While I was (surprisingly to me) ok with my DSL >> > connection out in the boonies, lots and lots of people with cable >> > weren't so lucky. And I'm not sure how bad the situation is with >> > cellular infrastructure, but I assume it's not much better than cable. >> > And I wouldn't doubt that other DSL deployments go dark when power is >> > down. I have no clue with fiber. >> > >> > So I guess what I'm wondering is what can we do about this? What should >> > we do about this? These days IP access is not just convenience, it's the >> > way we go about our lives, just like electricity itself. At base, it >> > seems to me that network operators should be required to keep the lights >> > on in blackouts just like POTS operators do now. If I have power to >> > light my modem or charge in my phone, I should be able to get onto the >> > net. That seems like table stakes. >> > >> > One of the things we learned also is that the blackouts seem to last >> > between 2-3 days apiece. I happen to have a generator since I'm out in >> > the boonies and our power gets cut regularly because of snow, but not >> > everyone has that luxury. I kind of want to think that my router+modem >> > use about 20 watts, so powering it up would take about 1.5kwh for 3 >> > days. a quick google look shows that I'd probably need to shell out $500 >> > or so for a battery of that capacity, and that's doesn't include your >> > phones, laptops, tv's, etc power needs. What does that mean? That is a >> > major expense for a lot of people. >> > >> > On the bright side, I hear that power generator companies stocks have >> > gone through the roof. >> > >> > On the dark side, this is probably coming to a lot more states and >> > countries due to climate change. Australia. Sigh. >> > >> > Mike >> > >>