{TAIL ~ An optical fiber communications network} using a star coupler to broadcast a selected transmission received on {HEAD ~ incoming channels} from one of a number of stations, over an equal number of outgoing channels to all of the stations 
{ TAIL ~ An optical fiber communications network } using a star coupler to broadcast a selected transmission received on { HEAD ~ incoming channels } from one of a number of stations , over an equal number of outgoing channels to all of the stations
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH