Please note that the code to disable Call Waiting may vary depending on your phone service and where you live. Please refer to your Telephone Directory for the correct code. The instructions below will allow Call Waiting to automatically disable each time you're online, and enable when you're off-line:
Double-click on the My Computer icon on your Windows desktop, then:
Windows 95, and 98 users: open the Dial-up Networking folder.
Right-click once on your ISP icon. A pop-up menu should appear.
In this menu, left-click on Properties.
Before the telephone number that is displayed in the Phone number: field, enter the code that is used for disabling Call Waiting in your area (e.g. *70), followed by a comma and a space. As an example, this field should now read "*70, 555-1234" if 555-1234 is your Internet Service Provider's dial-up number and *70 is the correct code.
Click OK.
Connect to the Internet and have someone call you to test ICM.
Go to the Apple menu.
Click on Control Panels.
Choose Remote Access.
In the Number field is the phone number your computer dials to access the Internet. Prior to this number, enter the code that is used for disabling Call Waiting in your area (e.g. *70), followed by a comma and a space. This field should now read "*70, 555-1234" if 555-1234 is your ISP's dial-up number and *70 is your code.
Connect to the Internet and have someone call you to test ICM.
When you close this window, choose Save to save the configuration changes you have made.
These instructions may not work for all ISPs, but they should for the majority. If you are having any problems configuring your modem to disable Call Waiting, please contact your ISP for help.