Tom wrote:
Cisco supports 802.3af with a special cross-over cable which is easy and cheap to make.
Nope, Cisco phones do _not_ support 802.3af. With the cross-over cable you can make them work off a 'dumb' power injector, but a true 802.3af injector without Cisco-proprietary support will not supply them power, as they will not negotiate for it since they don't support the same protocol. On top of that, a switch with built-in PoE can choose to supply power on the _data_ wires instead of the spare wires (which is fully supported by the spec), in which case a Cisco phone would have no hope of working.
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