{TAIL ~ The network} employs a Ring Wiring Center which includes a single optical fiber attached to {HEAD ~ a processor} 
{ TAIL ~ The network } employs a Ring Wiring Center which includes a single optical fiber attached to { HEAD ~ a processor }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD