a decoder coupled to {HEAD ~ the receiver} for recovering {TAIL ~ the selective call message} from the demodulated signal 
a decoder coupled to { HEAD ~ the receiver } for recovering { TAIL ~ the selective call message } from the demodulated signal
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH