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