Re: clock, data, and power on same line?

Question

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 times Best regards, Spehro Pefhany-- "it's the network..."                          "The Journey is the reward"             Info for manufacturers:  software/hardware/analog  Info for designers:

Winfield · Accepted Answer

There are ocean-going systems that only use one wire.  Plus the ocean, of course.

Spehro Pefhany · Answer

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 times Best regards, Spehro Pefhany-- "it's the network..."                          "The Journey is the reward"             Info for manufacturers:  software/hardware/analog  Info for designers:

Gary Tait · Answer

Spehro Pefhany  wrote in news:AFAIK, POE uses the other two pairs in an ethernet cable for power to the remote device (usually a wireless transciever).

DJ Delorie · Answer

There are two types.  One uses spare pairs, the other superimposes aDC bias on the TX/RX pairs.

Spehro Pefhany · Answer

Kind of bulky if you don't need it otherwise. Best regards, Spehro Pefhany-- "it's the network..."                          "The Journey is the reward"             Info for manufacturers:  software/hardware/analog  Info for designers:

Fred Bartoli · Answer

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.

Re: clock, data, and power on same line?

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