Forgive me if this is a bit off topic, but my company has just started to install IP Cameras with Power Over Ethernet connectors on the back. The idea of these is that power comes down the CAT5 cable, so you don't need a mains power supply.
Whilst this makes for a very neat installation, the problem is that you can't derive 12v from anywhere to power the heater, as the PoE Splitter is internal to the camera. I have asked the camera manufacturers why they don't supply a 12v source and they generally say that whilst some older analog cameras used to provide power output for heating/ventilation, this is not typically done today.
Is this true? Are heaters a thing of the past? Are there any IP Camera installers here who still power case heaters? How is it done? Have PoE powered IP camera manufacturers got it wrong?
-Jerry