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