Sorry, not possible. KAT5 is NOT an ethernet based system. It used CAT5 cable to carry balanced analogue audio and video signals. It can not and MUST not be connected to an ethernet hub. It also cannot be star wired for multidrop distribution, it has to be run as a daisy chain with transmitter at one end, terminated receiver at the other end and unterminated receivers in the middle.
Hoep that helps