power from phone line

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Article #3955

#3955

From: Hal Murray
Date: Tue, 05 Dec 1989 04:21

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Suppose you have some remote instrumentation, like a seismometer, 
or weather station, and you are transmitting that data back to a 
central collection point via a phone line.

Can you scrounge any power from the phone line? I'm not thinking of 
many watts, just enough to run a few slow CMOS chips.

Is there an obvious book I should know about that answers things like 
this?

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Path: arc1-ca.pugleaf.net!utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!decwrl!jumbo!murray
From: murray@jumbo.dec.com (Hal Murray)
Newsgroups: sci.electronics
Subject: power from phone line
Keywords: phone, power, remote
Message-ID: <14230@jumbo.dec.com>
Date: 5 Dec 89 04:21:13 GMT
Organization: DEC Systems Research Center, Palo Alto
Lines: 9