The routing data generation circuit generates and adds {TAIL ~ routing data} to the data frame received by {HEAD ~ the buffer} 
The routing data generation circuit generates and adds { TAIL ~ routing data } to the data frame received by { HEAD ~ the buffer }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD