voltage

Hi, I would like to buy a single injector for a Dahua cam (5442 - IRE - not led). This is the voltage and consumption specs: Power Supply DC 12V (±30%), PoE (802.3af) (Class 0) Power Consumption <7.2W I'm not sure about the required poe injector to buy. It should be <7.2W, so 12v/1a will...

Is it okay to give cameras 13.5v constantly? When it was 12v in the night some cameras turned off and other got some abnormal lines now when i made it 13.5v they are fine in the night but will this harm the cameras? Thanks in advance for reading this.

Hi i'm vahid new here and new here last week i was installing cams in a local school with hikvision 2132 3MPixel cameras.i used cat6 copper wires but i think cat5 wires could be the best choice to save bucks. because cams use 10/100 NIC and i think there is enough bandwidth with Cat5E .but i...