Its mean 'crypto phones', or custom firmware mobile phones with their own voice, chat and messaging system. The most recent busted operation, Anom, was actually run by Law Enforcement who backdoored the devices and recorded all the calls and messages. A very successful operation.

I am assuming there are several actual real not-run-by-the-police systems that they are referring to, I can see the NSW government introducing some really silly legislation that turns out to accidentally criminalize ios and android. Oops.