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