How to organize a video conference?

Question

System administration

Good afternoon, dear toastermen, how can I organize a conference call in the new office?
Now about the situation itself:
There is an office with a repair, wires are brought out in three corners - a twisted pair (copper) through the ceiling (Far-right corner, far-left corner and center (the camera should be above the TV))
All cables are brought out to the center of the room where the amplifier will stand under the speakers and other equipment under the table.
Task: Make sure that these three cameras (connected, judging by the situation, via PoE) can broadcast the image to Skype or an analog program like Lynk, etc. Which cameras to choose? and what equipment will be generally needed in order to connect these cameras to a computer?