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by kjellsbells 1 day ago
In rural America, the major telcos choose not to help, and that is a big factor here. You can't do stir/shaken crypto attestation of calls over TDM, but the big guys refuse to sell SIP trunks to rural operators.

see [1] for more on why stir/shaken hasnt helped as much as it ought to.

[1] https://news.ycombinator.com/item?id=48920432#48928781