In the Apple menu ( ), select System Preferences...

Click the Network icon
Click the TCP/IP tab

In the Configure drop-down list, select Using PPP
In the Domain Name Servers text box, type the DNS servers for your location:
Tulsa  206.230.48.4
            206.230.48.2
Oklahoma City 63.171.168.2
                          206.230.48.4
Wichita 208.34.44.7
               206.230.48.4
Chebanse 208.34.44.7
                   206.230.48.4
In the Search Domains text box, type intcon.net
Click the PPP tab

In the Service Provider text box, type Internet Connection
In the Telephone Number text box, type the telephone number of your local connection:
Tulsa 584-6137
Wichita 337-0197
Oklahoma City 815-9962
Chebanse 697-2650

In the Account Name text box, type your Internet Connection username (such as janedoe)
Click the Save password check box so that it has a tick
In the Password text box, type your Internet Connection password
Click PPP Options...

Click the Connect automatically when starting TCP/IP applications check box so that it has a tick
Click the Prompt to stay connected if idle for X minutes check box to remove the tick
Click the Disconnect if idle for X minutes check box to remove the tick
Click the Disconnect when user logs out check box so that it has a tick
Click the Redial if busy check box to remove the tick
Click the Send PPP echo packets check box to remove the tick
Click the Use TCP header compression check box so that it has a tick
Click the Connect using a terminal window (command line) check box to remove the tick
Click the Use verbose logging check box to remove the tick
Click OK
Click the Proxies tab

Click the FTP Proxy check box to remove the tick
Click the Use Passive FTP Mode (PASV) check box to remove the tick
Click the Web Proxy (HTTP) check box to remove the  tick
In the FTP Proxy and Web Proxy (HTTP) text boxes, they should be blank.

In the Port text boxes, hey should be blank.
In the Bypass proxy settings for these Hosts & Domains text box, there should be nothing.
Click the Modem tab

In the Modem drop-down list, select your modem (if your modem is internal, select Apple Internal 56k Modem (v90))
Click the Tone radio button
Click the Wait for dial tone before dialing check box so that it has a tick
Click Save

Your Mac is now ready to connect to the Internet Connection.