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From: "Peter O. Brackett"
Subject: Re: Communication and power in a 2 wires network
Date: Sat, 11 Jan 2003 11:14:59 -0500
Organization: MindSpring Enterprises
X-Server-Date: 11 Jan 2003 16:14:48 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2919.6600
"Emanuel Oliveira" wrote in message
> Hello to all!
> I want to be able to communicate and send power at the same time over two
> wires network.
> Can any one help me? Any chip reference, web site, etc. will be good.
> Emanuel Oliveira
What you ask for is done all the time in millions of instances. In the
commercial/carrier marketplace such systems are
known as DSL for Digital Subscriber Loop systems. Some use line powering
and most do not. For instance at 1.5Mbps
several of the widely deployed HDSL [High Speed DSL] systems use such
techniques, so do the standard line powered
analog modems V.32, etc...
Most of these "complete" line powered DSL systems are proprietary to the
modem/DSL manufacturers and not available
in the public domain, although there is a "merchant market" in chips for
some aspects of the function you are looking for.
If this is for a commercial deployment, I would suggest that you look into
purchasing complete systems from existing
manufacturers, for instance try Adtran, ADC or Paradyne, etc...
http://www.adtran.com. Adtran as well as others
design their own chips and systems "in-house" for achieving these functions
and due to a desire to maintain a competitive
advantage in terms of range and data rate at low power levels they do not
make such systems available outside their
What is the range [line length and line characteristics] and data rate in
which you are interested?
Although such systems are widely available commercially, to do this
effectively at long range and high data rate is
not a job for "amateurs" it takes considerable "know how" and resources to
As far as I know there are no self-contained "off-the-shelf" commercial
chips or chip sets for completely implementing
Indialantic By-the-Sea, FL.
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