nanog mailing list archives

Re: Muni fiber: L1 or L2?


From: Owen DeLong <owen () delong com>
Date: Thu, 31 Jan 2013 15:28:55 -0800


On Jan 31, 2013, at 13:57 , Fletcher Kittredge <fkittred () gwi net> wrote:




On Thu, Jan 31, 2013 at 4:36 PM, Owen DeLong <owen () delong com> wrote:
If you have an MMR where all of the customers come together, then you
can cross-connect all of $PROVIDER_1's customers to a splitter provided
by $PROVIDER_1 and cross connect all of $PROVIDER_2's customers to
a splitter provided by $PROVIDER_2, etc.

If the splitter is out in the neighborhood, then $PROVIDER_1 and $PROVIDER_2
and... all need to build out to every neighborhood.

If you have the splitter next to the PON gear instead of next to the subscribers,
then you remove the relevance of the inability to connect a splitter to multiple
OLTs. The splitter becomes the provider interface to the open fiber plant

Owen;

Interesting.   Do you then lose the cost advantage because you need home run fiber back to the MMR?   Do you have 
examples of plants built with this architecture (I know of one such plant, but I am hoping you will turn up more 
examples.)


I don't know of any. Yes, it would eliminate part of the theoretical cost savings of the PON architecture, but the 
point is that it would provide a technology agnostic last mile infrastructure that could easily be used by multiple 
competing providers and would not prevent a provider from using PON if they chose to do so for other reasons.

Owen


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