poe questions

Hi, I've an EZVIZ NVR (CS-X4-108P) which is POE only NVR with 8 channels. I've purchased a kit in 2019 which came with 4 cameras. Everything works well till now. But when I'm trying to connect Dahua camera to this NVR, it's not showing up in the monitor or mobile app. I've tried several...

I've Googled for hours and I'm still not clear on PoE voltages. I understand the current draw and VD over distance but can't figure out how what voltage is safe to use. I'm installing 4 bullet cams using CAT5e copper and maybe a PTZ at a later date. The longest run may be 75Ft. The cam specs...

Hi guys, as IP seems the standard to go and POE becomes a neat way to power the devices up, I wonder what POE switch for a home scenario you can recommend? Requirements: 4+ POE ports (at least 802.3af support?) - better 8 What standards should be supported? Are 15W output per port enough...

I thought all PoE was 48V. Why do the cameras I just purchased (see URL below) list the power supply in the specs as 12V? Can I not use an injector or switch listed as 48V PoE 802.3af for these cameras? Aliexpress.com : Buy DAHUA 3MP Network IR Bullet Camera 1080P IPC HFW1320S new model replace...

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...

Hey Guys, This may be a stupid question, but is it possible to run Power over ethernet to a POE injector? http://www.amazon.com/dp/B00EOSMT8U/ something like this to this http://www.amazon.com/dp/B001PS9E5I/