A method and {TAIL ~ an apparatus} for implementing {HEAD ~ a storage function} in a passive optical network system 
A method and { TAIL ~ an apparatus } for implementing { HEAD ~ a storage function } in a passive optical network system
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH