I have a Zyxel GS1900-10HP POE switch. I bought it under the impression it would be able to handle 5 Dahua HDW5231-RZ. I finally got my fifth camera hooked up and noticed one of the others went down. So I checked the log in and saw this - Port GigabitEthernet8: Power was denied because of insufficient power, or administrative operation. Can anyone with experience tell me if I bought an underpowered switch or is there a setting that I'm overlooking?