3Com WL-537 User Manual page 35

Heart Beat Signal Mode(For Australia only)
Figure 23 Heart Beat Signal Mode Screen
To set up the Router for use with an L2TP connection, use the following
procedure:
1 IT is a service used in Australia only. If you are using Heart Beat Signal
connection, check with your ISP for the necessary setup information.
2 Enter the User Name and Password you use when logging nonto your ISP
through a Heart Beat connection.
Accessing the Wizard 39