The communications channel 1 wherein {HEAD ~ said communications channel} is implemented in {TAIL ~ a data storage system} 
is implemented in
The communications channel 1 wherein { HEAD ~ said communications channel } is implemented in { TAIL ~ a data storage system }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL