{TAIL ~ The network processor} is configured to execute a quality of service module, {HEAD ~ an AG ONU monitor module}, a traffic forwarding module and an ONU management module 
{ TAIL ~ The network processor } is configured to execute a quality of service module , { HEAD ~ an AG ONU monitor module } , a traffic forwarding module and an ONU management module
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH