If you have an *ACTIVE* cabinet in the neighborhood, that means you have electronics & batteries & an uplink fiber to feed it. You'll also need another fiber in another direction. If I were to do things in town, that would make sense.
In my case I'm in the middle of nowhere so I have all of my customers all going to one solid concrete building (gas generator, LP generator, weeks worth of batteries) and a 100% underground plant. My only concern is illegal digging in the ROW. On Sat, Mar 16, 2024 at 5:45 PM Ken Hohhof <khoh...@kwom.com> wrote: > Mike Hammett kind of touched on what I was asking and why. I was told > that Metronet near me had a hut in Batavia that also served St. Charles, > Geneva, West Chicago, etc. via PON. > > > > Also a company that built a middle mile / anchor institution fiber network > with a BTOP grant 12+ years ago convinced the county to let them take it > private, and they have run aerial fiber in most of Shabbona which is one of > the towns Mike mentioned. With my misconception about how FTTH is > typically deployed, I expected there to be at least one cabinet or hut in > town. But I think they are just using strands from the BTOP project and > feeding it passively from a distant town. > > > > I would prefer to see more redundancy, especially since both buried and > aerial fiber definitely gets damaged around here, but I guess practical > results matter more than what-ifs. At least local power outages shouldn’t > take it down, and a central NOC or hut should be able to have serious > battery and/or generator backup. > > > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Josh Luthman > *Sent:* Saturday, March 16, 2024 4:12 PM > *To:* AnimalFarm Microwave Users Group <af@af.afmug.com> > *Subject:* Re: [AFMUG] PON question > > > > PON is one port at your end and then goes through splitters that reduce > light and add ports to end up at customer ONTs. 1:128 is pretty short > range and high customer count - we could never do that in a rural plant > (5-15 miles). Maybe 1:64 but that's about the limit. There is NO > redundancy in PON. Best you could do is 2x32 or whatever splitters which > is where you feed the downstream fiber with two PON ports. An engineer > from Metronet told me they did that but no one could ever answer why > (technically or operationally). Think like you have an AP on a tower > feeding 32 customers. What are the chances you have an AP right below it > with the same SSID/PSK/frequency for the customers to connect to if the > first AP goes down? > > > > Think of Active E like a bunch of dumb switches. You have a 48 port > switch that goes to 48 customers using 48 fibers. If the fiber feeding the > switch goes down, it can go to a different fiber/uplink port. > > > > On Fri, Mar 15, 2024 at 7:59 PM Ken Hohhof <khoh...@kwom.com> wrote: > > Since there are FTTH people here and I’m mostly ignorant of such things, > maybe someone can clear something up for me. > > > > I always assumed a PON based FTTH system had a topology kind of like HFC. > I expected fiber down the street with splitters, but fed by some sort of > neighborhood node in a cabinet with power and electronics, fed by active > EPL style fiber. Which could have redundant paths, rings, etc. so a fiber > cut wouldn’t take down a whole town or multiple towns, the backbone traffic > would reroute. > > > > I’ve been told this is not the case. And that instead, each PON could go > back over a strand to a headend several towns and many miles away, all > passive. > > > > Sorry for the poor description of my question, hopefully you can figure > out what I’m asking. > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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