Last Mile Design

Baldur Norddahl baldur.norddahl at
Sat Feb 9 10:54:24 UTC 2019

PON in urban areas absolutely makes sense. Maybe less in a high rise area,
where each building can have a small building wide network of its own. But
it in areas with single family homes PON is king.

Our POPs can have up to 10 000 customers each. All on a single 96 fiber
strand cable leading into the POP building. We have extra ducts, but
nothing that would allow us to change that to a point to point network.
That would require 100x that 96 fiber cable.

With extra ducts it would be possible to rebuild from PON to point to
point. But it would require massive investments. Basically you would have
to invest all that we saved by building PON. For starters, you would have
to have many more POPs.

And yes, there are splitters in the hand holes. This is not what stops you
from rebuilding from PON. It is the fact that we never paid for extra
fiber. The backbone in a sub area is typically build with a 24 fiber strand
cable. Because fibers are not free and are actually quite expensive as the
number of fibers grow and the distances get longer. We can do a few point
to point connections, for example if we need to deliver a commercial
service or for our own needs (to connect POPs etc).

We are not big on commercial services. But if we were, I would use WDM
splitters for that. Or the long awaited 10G PON if that ever arrives and
turns out at a price point that works.


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