This invention generally relates to 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 {TAIL ~ specified frequency} 
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This invention generally relates to 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 { TAIL ~ specified frequency }
OTH OTH OTH OTH OTH OTH OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL