RJ45 Conector

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Hi,

I want to use a rj45 connector but confused with different types and pinouts. Here is a one which I can find:
http://www.javanelec.com/RJ00000...

first of all, what this POE thing? Does it provide power to the board and what is its use? If using POE, the RJ45 connector differs like this:

http://pinouts.ru/Net/poe_pinout...

http://www.allpinouts.org/index....(PoE)

I also found Ethernet shield for arduino which uses pinouts different from the above:

http://arduino.cc/en/uploads/Mai...

It mentions that it uses a standard RJ45 connector but I could not find one with the documented pinouts.

Can you shed some light on this?
Thanks.

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Quote:
what this POE thing?
Power Over Ethernet uses the same cabling as the Ethernet data cable to power up a device without extra power cable, the voltage and current are limited of course.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

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note that with POE the pinout isn't any different, only the pins have dual purpose. [you also need special electronics on the power supply side for it to work, as well as special magnetics]

Writing code is like having sex.... make one little mistake, and you're supporting it for life.