VDSL
Brandon Martin
lists.nanog at monmotha.net
Wed Oct 16 08:21:52 UTC 2019
On 10/15/19 1:51 PM, Rod Beck wrote:
> These are large 19th century buildings with courtyards. I have seen lots
> of activity on this street - fiber being pulled from manhole and gear
> being installed in cable manholes. Corning on the cables.
Sounds like a fiber-to-the-curb deployment with G.FAST as the last
"mile". They run fiber to the nearest pedestal then install a small
G.FAST ONU/DPU at the pedestal fed by that fiber then delivering
potentially 500-1000Mbps over the last few 100ft into the existing
building on existing copper. Saves them from having to pull new drops
which can get very expensive.
It's a bit of a stop-gap to a full FTTH deployment, but it'll get you
very usable service for now and is relatively easily upgraded to full
FTTH in the future by just pulling a real fiber drop and hooking it up
to the existing fiber that's being used to feed the G.FAST ONU/DPU.
A lot of the G.FAST ONU/DPUs support VDSL2 fallback which they'll use if
the copper turns out to be especially terrible, too long, or the
customer doesn't want more than 50-100Mbps since the VDSL CPEs are
somewhat significantly cheaper than G.FAST. Might be where "VDSL" came
from.
--
Brandon Martin
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