I tried to go cheap and got this system on Amazon. I figured since they were POE cameras, they would work with a standard POE switch. I didn't want to run four cables all the way back to the NVR for power, which would require very long runs and new wall jacks with 4+ ethernets. When I plugged the cameras into the switch (a Linksys LGS108P), they wouldn't power on. This switch does 802.3af and 802.3at and powers my Cisco access points just fine.
I wrote to Annke and got a confusing answer:
Doesn't make any sense to me, as those standards dictate voltage negotiation and cable pinouts.
Long story short the cameras don't appear to be 802.3af or 802.3at, and I sent the whole thing back.