I'm looking at the hEX PoE (RB960PGS) for its 4x 802.3af/at-out ports (ether2-ether5). My question is: can it supply 802.3at out on all 4 ports advertised? If so, do I need to use the DC adapter or passive POE injector (or will either work)? I ask because 802.3at can deliver up to 25.5w, while the m...