{HEAD ~ An optical fiber communications network} using {TAIL ~ a star coupler} to broadcast 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 
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{ HEAD ~ An optical fiber communications network } using { TAIL ~ a star coupler } to broadcast 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
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD 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 OTH OTH OTH OTH OTH