Error 718/721 PPP Error
This problem tends to occur due to failure of the modem synchronising with the local exchange
 

• Recheck connection settings, as this error can be caused by dialling an incorrect number
   
• Restart your PC and attempt to reconnect as this can sometimes be caused by a synchronisation problem
   
• Recreate the Dial-up Connection
   
• Test the line connectivity by dialling the Internet Dial-Up number directly from your phone handset
   
• If this problem has been ongoing for a long period an upgrade or repair of the modem drivers is required in case the modem drivers have corrupted.