code: function continue_from_buffer(data) {
  
      var durations = continue_durations_from_hex_buffer(data);
  
      var on = durations[0];
      var off = durations[1];
      var stop = durations[2];
  
      return (8900 < on && on < 9200) &&
          (-2350 < off && off < -2100) &&
          (500 < stop && stop < 650);
  }
docs: determine whether or not the buffer is a valid continuation code