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