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Unread 07-21-2007, 03:08 PM   #4
affinity
 
Join Date: Apr 2006
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affinity will become famous soon enough
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Okay, how about this for a solution:
  • every device that you trust should prepend a known and fixed bunch of digits to every called number;
  • Treat the prefix set of digits as a PIN and don't disclose it to others;
  • create dial plans that only allow your 'premium' dialing if the known prefix is used.
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