The link apparatus also contains circuits for determining when a node has won {HEAD ~ arbitration} over {TAIL ~ another node} competing for time on the bus 
The link apparatus also contains circuits for determining when a node has won { HEAD ~ arbitration } over { TAIL ~ another node } competing for time on the bus
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH