The embodiments of the invention include a network element implementing {TAIL ~ an optical line terminal} that is configured to improve {HEAD ~ efficiency} in a passive optical network  
The embodiments of the invention include a network element implementing { TAIL ~ an optical line terminal } that is configured to improve { HEAD ~ efficiency } in a passive optical network
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH