[MLB-WIRELESS] Max distance, Power over ethernet and 5v AP's

Mark Aitken nodegxt at yahoo.com.au
Wed Dec 20 05:29:08 EST 2006

lukebaldan wrote:

>Hi guys, just wanting to know the maximum ethernet cable length you
>should run to a 5v access point, if you are delievering power to the
>AP via the unused pairs in the cat5. Thanks
>Melbwireless mailing list
>Melbwireless at wireless.org.au
You are limited by the resistance of the cable.

A better idea is to use a higher voltage, say 12volt, and then regulate 
it down to the required
voltage at the AP's position.

Still, several 10's of meters, maybe a 100m or so maybe acheivable this way.

The actual PoE (Power over Ethernet) spec allows for 48v @ 500mA, not 
sure of the cable run.


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