On Tue, 15 Apr 1997 13:43:11 -0700, Stan Sieler <[log in to unmask]>
wrote:

>Tracy writes:
>> Even more humorously, the thought occurred to me, what if someone developed
>> an interface between networking and local power grid?  After all, the only
>
>> Then more ominously, I thought, "What if someone has already invented it?",
>> "Perhaps the Government?"  60 cycles..... hmmmmm.
>
>Years ago.  I believe that there are at least two competing home automation
>products that use the AC wiring in your house for sending signals.  They
>either assume that the signals won't get past your main electric panel
>(or require a box at that end?).
>
>--
>Stan Sieler                                          [log in to unmask]
>                                     http://www.allegro.com/sieler.html

I work for a Electric Company and currently we us a remote meter
reading system that transmits on an ultra low frequency from the meter
along the power line to a receiver at the sub station.  The use of the
low frequency allows transparent transmission along the power line.
The drawback to using this frequency is that transmissions are slow
and therefore are monitored 24hr a day.