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We have a pair of these powerline networking gadgets from Netgear.
We have some outlets in the building we can't get coverage in, but
fortunately the rooms we need work just fine. We have wireless
coverage, but we can't use it for the intended application because
we aren't connecting a computer, we're connecting a video
phone--and it won't run the special software to access the
wireless network, even though they have built in wifi support. We
use the video phones for teaching institute classes to an outlying
branch.
-Jeff
Posted by: "Brian Cooper" bcooper at novell.com
<mailto:bcooper at novell.com?Subject=%20Re%3A%20LDSC%3A%20Powerline%20networking%3F>
Sun Mar 4, 2007 8:48 am (PST)
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I know someone who experimented with powerline networking in a building
that already had a Family History Center. We wanted to teach a Family
History Class on the far side of the building where the wireless didn't
reach and thought this would be an ideal solution. Unfortunately, we ran
into a snag - we could only reach part of the building. There is more
than one power supply coming into the building, and they are, for all
intents and purposes, completely separate. Power from the electrical
utility is high-voltage two- or three-phase, which is brought in that
way to the building, where a set of transformers step it down to the
voltage we use. From there, the distribution panels supply it to
different parts of the building as needed. I once saw one of these input
leads fail, leaving the building partially powered. What this all means
is that the power-line networking can only service the parts of the
building that are on the same input lead. For us, that meant that we!
could
network across half of the building, but the far classroom that we
wanted to use was inaccessible. You can install bridges across the
different segments of the power system, but that adds complexity, and
you are left with a kludge that still isn't very fast. In the end, we
just set up a temporary wireless access point for the duration of the
class. Powerline networking might work for a private home, but I would
be skeptical about proposing it as a general solution.
Brian Cooper
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