DP48 POE pin out and voltage.

Does anyone know on what pins the cat5 cable carries power to a DP48 POE rj45 port? What voltage is required to power them via that port? The Hub4 manual says the remote power follows the 802.3at spec but it appears there are a few varieties of pin options within that spec, and perhaps with voltage as well? Using pin 4 and 5 (+) and 7 and 8 (-) with 24v dc does not do it. The power supply to the DP48 uses 24V DC. The P16M uses those same pins but with 12v dc and it works fine. Looking for POE injector options as the HUB4 seems to be quite lost at sea.