After fiber goes to the client end there is a fiber coupler (splitter) which splits a line to two. One is fiber which goes to the ONU. ONU is the device that converts optical signal to electric signal and the ONU is connected to a CPE device through which internet works and the other is coaxial cable. Coaxial cable is used for watching TV as till this date the only mode through which TV signal is passed is coaxial cable. The coaxial cable goes to STB which converts analog Tv signal to digital signal.