I have had this PTZ running for almost 2yrs now, I purchased the BV-Tech 30w POE and never seemed to have a problem. When others started posting about their cam going offline, I started looking at the Cam logs and BI log. I noticed the cam logs showed logging off and back on and BI log showed "Signal: Restored". BI log never showed signal lost and never any breaks in recording. So I just ignored it since it seemed to be working.
Last month, 18th, I checked the cams and the PTZ was offline. I could not get it to reboot and could not find it on the network, about 6hrs later it came back online on its own.
A day or two later it went offline again, never to return. Could not find cam on network again. I unplugged the POE injector for a few minutes and when I plugged it back in I could hear the cam ticking outside.
I decided to purchase a Zyxel GS1200 POE+ switch. Plugged the switch in and the cam booted right up. Been running without a hiccup since. Nothing in logs.
I think this cam needs more power at times than listed requirements.