Symptom
The message "Could not open the communications device" when you try to connect to the Internet with the internal modem.
Solution
If you do not use a Bluetooth-compatible mobile phone for Internet access
1. Choose Apple Menu > System Preferences.
2. Choose View > Network.
3. Choose Network Port Configurations from the Show pop-up menu.
4. Deselect "USB Bluetooth Modem Adapter".
5. Click Apply Now.
6. Open Internet Connect (/Applications).
7. Choose Internal Modem from the Configure pop-up menu if it is not already chosen.
If you use both a Bluetooth-compatible mobile phone and the internal modem for Internet access
Be sure you first choose the appropriate device from the Internet Connect Configure pop-up menu.
Related documents
106575: "
Mac OS X 10.2: Modem Unable to Dial, 'could not open the communications device' Alert"