Re: A few GPON questions...

[Ben Cannon <ben () 6by7 net>]

We think it makes sense for cost reduction for semi rural or suburban aerial distribution- reducing the fiber count to 
like. 12. Reduces costs dramatically vs say a 288 count and all the splicing. (Ribbons are better)

-Ben

> On Dec 11, 2018, at 10:49 AM, Owen DeLong <owen () delong com> wrote:
>
>
>
> > On Dec 11, 2018, at 10:01 , Ben Cannon <ben () 6by7 net> wrote:
> >
> > Sure but I can fit quite a lot of fiber in very little space. eg an 864 is approx 1” dia.
> >
> > Fan-outs can be done each floor, etc.  And a single single mode strand has prodigious bandwidth available with the 
> > right optics.
> >
> > Bonus: if you did this 30 years ago, you’re still good.  Anything else (remember FDDI grade Multi-mode?) is not 
> > future proof IMO.  Basic 9/125 Singlemode always will be.
> >
> > In city wide deployments, a bit different, especially for eg residential service at economical pricing.  GPON for 
> > sure has it’s place, I just don’t personally feel it’s inside a building all else being equal.
>
> I’d actually argue that even if you’re going to do GPON on a wide distribution, the economics these days make a 
> pretty good case for future-proofing with home-run fiber and putting your splitters and GPON gear in the same 
> location. The link budgets turn out to be identical regardless of how far upstream the splitter is and once you dig 
> the trench, the cost of the fiber itself is relatively cheap.
>
> Home run means you aren’t locked into the PON topology if something better comes along in the future. It also opens 
> up the potential to support competition (which I realize may be considered a detractor by some).
>
> Owen
>
> > - Ben Cannon, AS15206
> >
> > > On Dec 11, 2018, at 9:24 AM, Jason Lixfeld <jason+nanog () lixfeld ca> wrote:
> > >
> > >
> > >
> > > > On Dec 11, 2018, at 11:32 AM, Ben Cannon <ben () 6by7 net> wrote:
> > > >
> > > > Rip it out and run 9/125 SMF fiber home runs. Use BiDi SFPs to re-use your existing (likely SMF thankfully) cable 
> > > > plant.  My opinion.
> > >
> > > There’s only so much space in conduits, risers and ducts.  At some point, scale would press this up against 
> > > physical infrastructure realities depending on how far the active gear at the head end is from the subscriber.