BT Turns Sheriff On Lawbreakers To Stop Fraud 
By Sheridan Nye, Total Telecom

Telephone companies are reluctant to discuss figures, but fraud is 
believed to siphon between 3 percent and 6 percent of revenues -- billions 
of dollars -- every year as telephone hackers target unprotected switches. 
One of the most vulnerable areas is dial-through fraud where, for 
instance, a call to a voice-mail system can be redirected to another
number.

"Telcos are losing billions of dollars every year," said Cooper. "So even 
if they can stop a fraction of it, they are going to make significant 
savings."