In alt.home.repair, on Wed, 29 Jan 2020 19:56:12 -0500,
wrote:

https://www.msn.com/en-us/news/technology/blocking-robocalls-now-us-based-voip-gateway-carriers-hit-by-doj-lawsuits/ar-BBZrxJT

Yes, I think everyone wants this, except the scammers and thieves.

"The FCC also aims to mandate that carriers implement its SHAKEN/STIR
authentication system to help combat robocalls. AT&T and Comcast in
March announced they had successfully tested SHAKEN/STIR-authenticated
call interoperability across networks. "

"its SHAKEN/STIR authentication system". They've been trying to get
James Bond to testify about this, but he hasn't. Many people say he's
been resisting the subpoena.