This invention generally relates to {TAIL ~ the field} of communication systems, and, more particularly, to apparatus for decoding signals which are encoded by means of {HEAD ~ one or more tones} of specified frequency 
This invention generally relates to { TAIL ~ the field } of communication systems , and , more particularly , to apparatus for decoding signals which are encoded by means of { HEAD ~ one or more tones } of specified frequency
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH