Specifically, the embodiments of the invention relate to a system and method for using {HEAD ~ alternate routing} through {TAIL ~ an aggregate optical network unit} to cost effectively improve protection and improve energy efficiency 
through
Specifically , the embodiments of the invention relate to a system and method for using { HEAD ~ alternate routing } through { TAIL ~ an aggregate optical network unit } to cost effectively improve protection and improve energy efficiency
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH