Troubleshooting guide

Cingular Communication Manager Help
138
Error 720: No PPP control protocols configured
This error is typically reported if an unexpected error has occurred while
connecting to a GSM
network.
Follow these steps to resolve this error:
1. Verify that there is no default dial-up connection selected in the Control
Panel. Click here
for instructions.
2. If you are still unable to connect, shut down your PC. Then, restart the
computer and the Communication Manager software and try to connect
again.
3. If you are still unable to connect, reinstall the software drivers for you
wireless device. See Reinstalling the Device
for more information.
4. If you are still unable to connect, your device's Subscriber Information
Module (SIM) may not be properly configured for data access. Contact
Cingular Customer Care for Additional Support
.
Error 721: Remote PPP peer or computer is not responding
This error is typically reported if an unexpected error has occurred while
connecting to a GSM
network, but has also been known to occur on CSD
connections.
Follow these steps to resolve this error:
1. Verify that there is no default dial-up connection selected in the Control
Panel. Click here
for instructions.
2. If you are still unable to connect, shut down your PC. Then, restart the
computer and the Communication Manager software and try to connect
again.
3. If you are still unable to connect, reinstall the software drivers for you
wireless device. See Reinstalling the Device
for more information.
4. If you are still unable to connect, your device's Subscriber Information
Module (SIM) may not be properly configured for data access. Contact
Cingular Customer Care for Additional Support
.