The method 20, wherein {HEAD ~ the data} produced at {TAIL ~ at least one end terminal} are digital, non packetized data 
produced at
The method 20 , wherein { HEAD ~ the data } produced at { TAIL ~ at least one end terminal } are digital , non packetized data
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH