If you are experiencing trouble connecting to other nodes or hubs, there's a few ways to remedy the issue.
1) Submit a ticket by visiting http://wh6av.net:81/osticket. Please indicate your node number(s) that you are having issues with connecting.
2) You can request to have a node entry manually added to the node number(s) that you are trying to link with.
3) Or you can request to have your node number(s) registered with HAMVOIP REGISTRATION SERVERS yourself.