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ModemHelp.Net Recommends: Free System Scan for PC Errors

Error 643

1.  Check dialer settings and make sure they are dialing the correct number.

2.  Is the user on a network?  If not, check the network control panel and perhaps reinstall the components.

3.  If the user is on a network have them contact their sysadmin and make sure that their network is configured to dial out.