Re: FCC now planning "all-IP" phone transition [Telecom]

"Neal McLain" <nmclain@xxxxxxxxxxxxxx> wrote in message
news:4B45FB69.6080408@xxxxxxxxxxxxxxxxx

Thanks for the info. I'm surprised that it was line powered, because
every DLC I've seen was pad-mounted and had an electric meter. But I
can certainly understand why they wanted to avoid equipment that
required its own power. Cable TV networks have numerous power
supplies, and maintaining them has always been a headache.

That's one of the reasons Verizon is pushing FiOS. It is a PON, which
means "passive optical network." Passive is the key word here; PON's
have no powered equipment between the endpoints. All power is at the
"CO" or premise. Couple that with the fact that fiber doesn't
rust(*), and you can see they are creating a very reliable, low
maintenance cost infrastructure.

Cable networks use a hybrid fiber coax system (HFC). HFC does require
powered equipment in the field. There are some powered amplifiers,
but the biggest powered pieces are the "nodes," which convert between
fiber and coax. Thus, HFC infrastructure is inherently costlier to
maintain than a PON.

However, HFC infrastructure has been built out over a much wider area
of the country than FiOS, so it has the advantage of a much larger
installed base to amortize costs across.

-Gary

(*) When I had FiOS installed last spring. the connection between my
drop and the neighborhood fiber was made in an underground box that
was flooded. After screwing the connectors together, the tech simply
dropped the connection into the water. I asked if he was concerned,
but he wasn't. The connection is water tight (at least to a few
feet), and with no metal in the cable, water is no problem.

.

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