Set the wayback machine to [?]
"A common route for criminals is to tap into a private branch exchange (PBX) through a remote access feature, steal the code, and then set up a "call-sell" operation. Scam artists also tap into voice mail systems to "crack a code" and then proceed to transfer toll calls through the public switched network."
That's from a press release from the Alliance to Outfox Phone Fraud, at
http://www.thefreelibrary.com/FIRST+ANNIVERSARY+OF+ALLIANCE+TO+OUTFOX+PHONE+FRAUD+IS+CELEBRATED...-a018271340
It's from 1996 (whenever 5/9/96 is).
Nine teen nine ty six, grandad (I won't shout, it's not polite).
This is still going on twenty years later? Why? How?