{TAIL ~ The gateway} can communicate with {HEAD ~ the RFID reader} using active RF communications, power line communications protocol, or hardwire connection 
{ TAIL ~ The gateway } can communicate with { HEAD ~ the RFID reader } using active RF communications , power line communications protocol , or hardwire connection
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH