Enterprise GPON / Zhone Questions

Wed Dec 12 22:13:57 UTC 2018

Many 1U GPON OLT switches have 16 OLT ports and each port can have up to
128 ONT. This gives you 2048 ONT in one unit for the OLT. Typical power is
less than 200 watt.

Each ONT has 4 or more ethernet ports. So multiply with that. You could
have a small campus on just one unit of OLT. On the other hand, I am not
sure you will actually save any power as the ONTs also need power and they
are many.

Regards
Baldur

ons. 12. dec. 2018 22.56 skrev Mike Hammett <nanog at ics-il.net>:

> Lower power consumption of electronics and the fact that most (not all)
> deployments don't need more than 10 megs committed to them, so share a big
> pipe and burst away. 1U can have 256 endpoints easily and consume less
> power than a regular switch.
>
>
>
> -----
> Mike Hammett
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> ------------------------------
> *From: *"Alfie Pates" <alfie at fdx.services>
> *To: *nanog at nanog.org
> *Sent: *Wednesday, December 12, 2018 3:34:29 PM
> *Subject: *Re: Enterprise GPON / Zhone Questions
>
> The discussion was regarding an in-building LAN - residential access
> networks/WANs are a wholly different beast and GPON is fantastically
> suitable for that particular problem.
>
> There is, however, a reason that a lot of new mixed-use (business &&
> residential) WAN fibre deployments end up building a home-run dark fibre
> network for business use and overbuilding with GPON for residential use -
> the 1-1 mapping of end users to patch points/flexibility points makes for a
> vastly more future-proof network.
>
> I think we often underestimate just how long the networks we install stick
> around. I ordered a 10Gbit/s service not too long ago over the very same
> fibre that was used to serve 2Mbit/s connections in the mid 90s: I'm not
> kidding, the fibre was physically disconnected from an old, derelict
> 2Mbit/s SDH network termination and plugged into a brand new 10Gbit/s EDD.
>
> GPON is cool, definitely - I've worked on very large scale GPON
> deployments before, and it is definitely a very useful technology that
> allows us to affordably deploy high-bandwidth consumer and small-business
> connectivity.
>
> However - it is a compromise, and I don't think you're gaining anything by
> running GPON versus the tried-and-tested method of active, switch-based
> aggregation, especially compared to the sacrifices you make deploying a
> passively-aggregated network.
>
> As I said before - I wouldn't stake my reputation on it.
>
> ~A
>
>
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