def human(self):
        """Emit the address in human-readible format (AA.BB.CC)."""
        strout = ''
        first = True
        for i in range(0, 28, 2):
            if first:
                first = False
            else:
                strout = strout + '.'
            strout = strout + self.hex[i:i + 2]
        return strout