{HEAD ~ The ONU management module} is configured to receive {TAIL ~ a message} from the ONU that the ONU has switched to an active mode from the sleep mode to receive the received data traffic from the OLT over the optical line 
{ HEAD ~ The ONU management module } is configured to receive { TAIL ~ a message } from the ONU that the ONU has switched to an active mode from the sleep mode to receive the received data traffic from the OLT over the optical line
HEAD 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH