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PoE?

This is probably going to sound like stupid question #5000, but please be nice :)

I'm wondering if you can use a "standard" four-port wired router to power, say, WRT54G's, located outside a building, with Power over Ethernet.

For example: you have the wired router inside, on mains power, and then you run the Cat5 to the PoE convertor, which then powers the WRT54G. And then you have another WRT54G powered by the second port on your wired router, and so on.

I'm looking to prevent losses via antenna cabling by mounting the AP itself outside with pigtail, but I'm not too keen on leaving a PC on

24/7 (in an area with no aircon) to power it all.

Is this idea possible?

Thanks,

Reply to
David Fairbrother
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Do you know for a fact if the unused conductors inside the router are not connected to ground or does the PoE float the router side of the unused pairs?

If you don't know for sure, you could simply make up a patch cable from the router to the PoE and cut off the white/blue and white/brown pairs before inserting the cable into the crimp connectors. The white/orange and white/green pairs are for data.

Reply to
DTC

No. At least, not with 'normal' routers. There's some specialist PoE router which is designed deliberately to pump power out over the unused pins in each JR45 socket, but the client would have to be similarly designed (or use special cables) or else you'd fry it when you plugged it in.

Make yourself a PoE cable - its easy: separate out the 2 unused pairs from the RJ45 jacks at each end of the cable. Take the outside router's PSU, snip the cable between the wall wart and the plug that goes into the router. At each end of your CAT5 cable, attach the spare pairs to the +ve and -ve on the severed ends of the power cable (be careful to keep the polarity right!). There you go.

Reply to
Mark McIntyre

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