View Single Post
Unread 07-21-2007, 03:08 PM   #4
Join Date: Apr 2006
Posts: 799
Thanks: 66
Thanked 61 Times in 44 Posts
affinity will become famous soon enough

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.
affinity is offline   Reply With Quote