Just received one of those holiday scam calls with callerid of 1300123456 which is clearly not a valid caller id. I was wondering how these calls get into the NZ PSTN. Are there providers which accept any caller id from their customers? Or do these calls come via other providers overseas.
I was wondering why the Telco's don't enfore a rule requiring valid caller id on their interconnect links and disconnect anyone who dosen't comply.