[LINK] Why don't telcos cut off bulk scam calls

[David]

On Friday, 19 September 2025 10:41:13 AEST Tom Worthington wrote:
> I don't see why the telcos could not detect and stop this.

But how?  If all banks, acting individually, were required to develop a mechanism for "detecting and stopping" this dangerous traffic they would always risk missing a spam connection or blocking a legitimate message, with possibly litigious consequences.

Perhaps Australian banks acting co-operatively, could develop a secure AusBank gateway.  This would require some form of client authentication (even for VoIP messages) but that might make things even worse for citizens without a proper understanding of the problem.  Then the insurance companies, and the health providers, and the online advertisers, etc. etc... would all want one of course.

At a personal level, if your VoIP service uses a decent domestic Analogue Telephone Adapter (ATA), you can almost certainly  configure a white-list of acceptable calling numbers and block the rest.  And you could configure a star-code to add acceptable callers you've forgotten.

_DavidL_