[AusNOG] Why not Symmetric ingress and egress?

[craig at askings.com.au]

> Stephen - the GPON technology they are considering has a natural 2:1
> ratio as part of the tech standard (2.5Gbps down, 1.25 Gbps up, shared
> amongst ~32 drops in the PON), which is one consideration - and  much
> better than the 20:1 ratio inherent in DSL - Hence the 100Mbps down, 50
> Mbps up plans. There is no technical reason why an RSP couldn't offer
> something like 50 Mbps symmetric though.
>

Given that the highest upstream being publicly offered is 8mpbs, even with
64 drops per PON you are only using 512mbps of your 1.25Gbps available.

It doesn't seem that the underlying technology really has much to do with
the restriction on the upstream speed.

Craig.