A utility that lets you control and monitor the modem connection in an Airport Base Station. It provides status on the connection, the IP address assigned by your ISP, etc. Works on both wireless and wired machines.
What's new in Airport Modem Utility
Added a compact user interface, connection timer, and preferences dialog.
Fixed bugs related to changed in the TCP/IP configuration.
Add support for Mac OS X Classic environment. (But the program is not yet Mac OS X-native.)