I am installing Hikvision cameras at my brand new new store. I had all the necessary cables fished to my Camera room, but yesterday I decided to add 4 more cameras and now I cant run the cables from new location to camera room. Some how i managed to run all four cameras to a different room and I have one cable from that room going to my Camera room. Now my questions is: 
1. How can I send the feed from four cameras through one cable to my NVR? 
2. Should I use POE switch? 
3. I am using 16 channel POE switch with my NVR. 
4. Any wireless transmitter available to do this job? 
  
Thanks