On Demand
Connection that is automatically started when the PortMaster queues packets for the remote location. This dial-on-demand connection can save money---the telephone line is used only when transmission is necessary---and can also back up other types of connections, such as those using high-speed synchronous lines.
Note the following for this connection type:
Do not use it for the route to the loghost, to any RADIUS server, or to any host for a port that uses the PortMaster login or device service--unless you understand the effect of these services on dial-on-demand routing.