On the basis of a LINK ID held by the data, data requiring {HEAD ~ storage}, e.g. data making exclusive use of a wide bandwidth such as audiovisual data and large volume data packages, are determined among all the data sent to {TAIL ~ an optical network unit} 
On the basis of a LINK ID held by the data , data requiring { HEAD ~ storage } , e.g. data making exclusive use of a wide bandwidth such as audiovisual data and large volume data packages , are determined among all the data sent to { TAIL ~ an optical network unit }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL