a question is it possible on netPower 16P to use two port PoeOUT simultaneously power two devices with different voltages such as: ipcam 12v and access points 25v?

Hello,
Device itself does not have an onboard voltage converter. You need 24V PSU to have 24V PoE out and/or 48V PSU to have 48V PoE out (IEEE 802.3 at/af).