Hi,
I have strange problem with powering IAP-275 from mediaconverter (Microsens MS657099PX, unmanaged, compliant with IEEE802.3af/at PoE+ standard) - only a half of them turned on. I tried to reseting mediaconverter, or to replug AP, but nothings work - still mediaconverter doesn't supply power.
I also tried to connect to the same mediaconverters other IAP-275 which I have as a back-up, and at every time it turned up without any problems.
It looks like it is a device incompatibility, but every mediaconverter, and IAP are exacaly the same model from the same delivery.