A capacity monitor can monitor capacity related conditions of {HEAD ~ a data port}, including bandwidth usage and {TAIL ~ reservation conditions} 
A capacity monitor can monitor capacity related conditions of { HEAD ~ a data port } , including bandwidth usage and { TAIL ~ reservation conditions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL