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From: faunt@spar.UUCP
Newsgroups: sci.electronics
Subject: Re: Communication over power lines - is it legal?
Message-ID: <1668@spar.SPAR.SLB.COM>
Date: Tue, 12-May-87 18:40:43 EDT
Article-I.D.: spar.1668
Posted: Tue May 12 18:40:43 1987
Date-Received: Fri, 15-May-87 05:23:32 EDT
References: <3271@ece-csc.UUCP> <1286@ur-tut.UUCP> <1708@megaron.arizona.edu>
Reply-To: faunt@spar.UUCP (Doug Faunt)
Organization: Schlumberger Palo Alto Research - CASLAB
Lines: 8

In article <1708@megaron.arizona.edu> wendt@arizona.edu (Alan Lee Wendt) writes:
>
>I wonder if Tempest rooms (isolated computer rooms for classified stuff)
>typically include an isolation transformer to prevent transmitting
>information back from the computer along the power line?
>
At least the ones I was in, and those that had telephones had them on
opto-isolators.