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Historically, you whistled them (https://en.wikipedia.org/wiki/Phreaking https://en.wikipedia.org/wiki/Phreaking), or you bought a hardware ‘whistle’ from the l
by Someone 4y ago
Historically, you whistled them (https://en.wikipedia.org/wiki/Phreaking https://en.wikipedia.org/wiki/Phreaking), or you bought a hardware ‘whistle’ from the likes of Steve Jobs (https://en.wikipedia.org/wiki/Blue_box https://en.wikipedia.org/wiki/Blue_box)