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by rsynnott 659 days ago
I'd assuming they're talking about TETRA, presumably one of the export versions (I don't think TEA2 (only available to European public safety orgs) is known to be broken at this point, though its age and obscure nature wouldn't give you much confidence).

There's a good talk on it here: https://media.ccc.de/v/37c3-11761-all_cops_are_broadcasting