Now, operators of those legacy links make A LOT of money for operating them since they carry 100% of the country's spam traffic, and they're not going to shut them down just because you think they should. The government would have to make them do it and they'll pretend upgrading is super expensive.
These two categories should be denied by default by my telecom provider, and the user must opt-in to receiving them.
> Now, operators of those legacy links make A LOT of money for operating them since they carry 100% of the country's spam traffic, and they're not going to shut them down just because you think they should.
Those operators are not my concern, they can do whatever they want. I want my telecom provider to block unknown/unverified calls by default. I have no reason to ever receive a call from an unverified source. Some people might, because they have business or relatives or whatever in such a region, and they can opt-in to receiving them if so.
Easier (and correct) fix: Telecoms operators should not be permitted to provide transit to a call that's routed through one of these.
> I know they allow it so some grandma in rural France that still uses a dial phone on a copper line that hasn't been touched since 1962...
This doesn't make sense. Even my inexpensive Mikrotik switches can augment packets with the ID of the port that they originated from. I do not believe for even a second that Telecoms Grade switching equipment is unable to do the same. The fact that that grandma can send and receive calls tells you that both that that equipment exists and that it knows what port her phone is connected to.
Mikrotik is a young spring chick compared to the dinosaurs in telecom.
The example should rather have been some telecom carrier in Africa or India. Telco equipment is expensive, the technology is ridiculously complex and getting companies especially in less well-off regions to replace aging stuff and updating it to modern standards is next to impossible. Think about it, the globally connected phone system includes countries where you get 10 GBit/s symmetric fiber in your home and it includes countries where people don't even have running water because they're so poor.
The fact that we in Western countries can have a realtime conversation with someone in the Saharan desert or in an Indian village that requires days worth of travel [1] is nothing short of a miracle.
[1] https://www.aljazeera.com/gallery/2024/5/8/an-election-booth...