On 3/10/06, jonheal <[EMAIL PROTECTED]> wrote: > Anyway, I wasn't talking about "real" Power Over Ethernet (PoE). I was > describing jury-rigging something that just piggy-backed on that last > length of cable between the switch and the SqueezeBox. I think the real > PoE systems are sort of standardized on 48V. And I guess there are > actually 4 free wires in the ethernet cable.
The standardized version of PoE (802.3af) doesn't actually need to use the extra pairs. Ethernet uses isolation transformers, so it's possible to combine power and signal by putting a DC voltage between the two pairs. - Jacob _______________________________________________ Discuss mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/discuss
