Re: Easy to deal with if the will was there
"1 Telcos have a charging system and that must work internationally. I very much doubt that's hacked as easily as caller ID."
It works on a 'previous link in the chain' basis. International calls might have passed though multiple networks to get to you, you just bill the telco who gave it to you. You can't see any further back than that. A telco will have a number of interconnects to other telcos, they only have billing relationships with those telcos.
For international calls, the former monopolies are now minnows. The large operators are people like Primus in London who operate a 'blind' exchange. The UK telco picking up a call bills Primus, Primus then bills the operator who delivered the call to their switch from overseas. The end telco can't see where the call came from, what networks it has traversed, or whether the CLI is likely to be right or not.
Biting the hand that feeds IT
