> [TELECOM Digest Editor's Note: A couple things I do not understand
>> about voice communication over electrical power lines: Some say it
>> will not work; others say it is okay.
> My understanding is there are two different electrical systems in the
> world, the 220v version the rest of the world uses, and the 110v the
> US uses. In the rest of the world, a fairly large number of residences
> are run off a single transformer, where in the USofA, a much smaller > number are run.
> For example, in my neighborhood, each block of houses (8-10) has its
> own transformer, which would require a fiber run, or some way to
> couple it to the 12kv 3phase line that drives the transformer.
> Multiply by millions and millions of these things all over the place,
> and it is easy to see why, even though it is being reported in the US
> media, the actual action is taking place in a foreign county, in the
> article, it was Japan.
A few years ago the Los Angeles Department of Water and Power had planned a system, don't know if they ever went ahead with the plans.
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