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