+ comes into being, the possible values are:-<br>
+ <table>
+ <tr><td>A</td><td>ACK</td></tr>
+ <tr><td>B</td><td>Broadcast</td></tr>
+ <tr><td>C</td><td>Catch up</td></tr>
+ <tr><td>J</td><td>Join</td></tr>
+ <tr><td>L</td><td>Leave</td></tr>
+ <tr><td>M</td><td>Multicast</td></tr>
+ <tr><td>N</td><td>NAK</td></tr>
+ <tr><td>P</td><td>Point to Point</td></tr>
+ <tr><td>T</td><td>Time (ping with time)</td></tr>
+ </table>