You establish a dial-up PPP link by having the dial-out machine call the dial-in server. You can instruct the dial-out machine to call the server by specifying the demand option in the local PPP configuration files. However, the most common method for establishing the link is for the user to run the pppd command on the dial-out machine.
Before you proceed to the next task, you should have done either or both of the following:
Set up the dial-out machine, as described in Configuring the Dial-out Machine
Set up the dial-in server, as described in Configuring the Dial-in Server