Thread got deleted -- this is a different topic moderators, but I would say they're not doing more as they see the PSTN as dying, and it's not being enforced by the FCC, plus, we're dead. And, it's money lost, so yes, you're right.
CPN Screening on DMS came out in 1998 -- maybe earlier.
DMS would send the following bits when CPN Screening was enabled for PRIs.
SI of 01 for user provided number, verified, passed
SI of 11 for network provided number
SI of 00 for user provided number, not screened for spoofing
SI of 10 for user provided, verified, and failed (may be a spoof)
10 could be set to swap to 11 without telling you, and throw out the spoof, or reject the call.
So, I can't spoof. I could spoof on VOIP though. We did a friendly spoof to test security.
So I'm asking VOIP providers why they aren't doing this. They can't be bothered. We did something like this with private and unknown callers too.
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