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