There are ocean-going systems that only use one wire. Plus the ocean, of course.
There are ocean-going systems that only use one wire. Plus the ocean, of course.
PoE = Two pairs, minimum, right? = 4 conductors. USB = 4 conductors IEE1394 = 6 conductors (if power provided) POTS = 2 conductors minimum
1-wire = 2 conductors minimum, 3 used at timesBest regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Spehro Pefhany wrote in news: snipped-for-privacy@4ax.com:
AFAIK, POE uses the other two pairs in an ethernet cable for power to the remote device (usually a wireless transciever).
There are two types. One uses spare pairs, the other superimposes a DC bias on the TX/RX pairs.
Kind of bulky if you don't need it otherwise.
Best regards, Spehro Pefhany
-- "it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
Le Wed, 22 Aug 2007 14:26:21 -0400, Spehro Pefhany a écrit:
I wonder how waves propagate in this transmission line and what ground current looks like.
-- Thanks, Fred.
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