Ubiquiti Aircam and Aircam Dome run on 24-volt POE.

Higher-end cameras including Pan Tilt Zoom (PTZ) cameras, use 48-volt POE.

If you are using Ubiquiti POE switches, you will need a TS-PRO-8 for 48-volt: That is the 8-port version.  The smaller version of Tough Switch with 5-ports only has 24-volt POE.