Writing in *#TheAmericanProspect*, #KalenaThomhave does an *excellent* job on the technical ins-and-outs of calling on PUCs to regulate prison-tech, both in California and in other states where PUCs haven't yet been neutered or eliminated by deregulation-crazed Republicans:
https://prospect.org/justice/2023-05-08-california-prison-phone-calls-free/
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