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