FTTH Active vs Passive

Tue Dec 1 17:59:46 UTC 2009

On Tue, 1 Dec 2009, Dan White wrote:

> However, there are some advantages to GPON - particularly if you're
> deploying high bandwidth video services. PON ONTs share 2.4Gb/s of
> bandwidth downstream, which means you can support more than a gig of video
> on each PON, if deploying in dense mode.

You don't need to supply more than a gig per household, so active gige (or 
100meg) is enough to feed the household with their broadcast video needs. 
So yes, you will need 10GE to the node and 100/1000 to each household do 
this this kind of video.

PON only makes sense with low take-rates and high per-truckroll costs when 
I did the business case last time.

> Another big advantage is in CO equipment. A 4-PON blade in a cabinet is
> going to support on the order of 256 ONTs.

But you lose out on the CPEs, at least historically these were much more 
expensive than the 100FX/TX media converters available in the market.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se