Do you experience such delays on wired devices connected to the same switch which feeds the EAP, too?

No. It needs 24V, so you would need two 12V batteries connected in series. But use a stabilizer to ensure a constant voltage.

I still don't get your problem. In recent switches you assign an IP to the switch's interface of a VLAN. So, if you use VLAN 6 you assign the first switch's IP to the first interface on the first...

If you change the IP of the EAP or if DHCP assigns another IP due to short lease expiration time, it is possible that two IPs temporarily show up in the ARP table: [CODE]# arp -a IP address HW type...

Ahh, I see. The power injectors have some way of an "out-of-band signalling" to communicate a pressed reset button to the CPE. Maybe your dvr network did trigger this signalling. This would explain...

Can you describe it in more detail? What topology, which antennas in use, what kind of disconnect at what distance to the AP, which angle to the AP and so on ...