Apple iMac G5 - Manual (Page 70)

70 Appendix C Connecting to the Internet
3 Choose Network Port Configurations from the Show pop-up menu and select the On
checkbox next to Internal Modem.
4 Drag Internal Modem to the top of the Port Configurations list to make it the preferred,
or primary, network interface.
5 Choose Internal Modem from the Show pop-up menu and click PPP.
6 Enter the information from your ISP and click Apply Now.