{HEAD ~ Communication} with the ESLs is accomplished using {TAIL ~ communication base stations} 206A and 206B and reading of the RFID tags is accomplished using portable RFID readers 208A and 208B 
is accomplished using
{ HEAD ~ Communication } with the ESLs is accomplished using { TAIL ~ communication base stations } 206A and 206B and reading of the RFID tags is accomplished using portable RFID readers 208A and 208B
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH