Your page showing how to get DSL stats doesn't have the 3220H procedure, in case you want to add it:

Connect to your 3220H using your browser. Its default address is: http://192.168.1.254/

The main management menu should be displayed:

Click "Monitor" to get to the monitor menu:

Click "DSL" to view DSL stats:

Note: Thanks to Paul W. for providing these procedures and screeshots.