The execution server supervises prioritization and scheduling of test requests from {HEAD ~ all client machines} in {TAIL ~ the communications test network} 
in
The execution server supervises prioritization and scheduling of test requests from { HEAD ~ all client machines } in { TAIL ~ the communications test network }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL