2x Cameras on one cable

Hi All,


I'm strugling to get working my 2x Hikvision Cameras with the NVR 7608NXI-K2. I bought a pair of rj45 splitter as shown on the picture and connected as shown ( pic2)

However it does not work at all. I'm wondering if this nvr is able to work in this setup ? Can someone confirm ? Or maybe there is a setting on the nvr that I miss ? As I do not see any power entering the ports when the splitter is connected. Single cable connection nvr-camera works perfect.

Thank you for any advice.