While talking about the data breach Moses mentions reprogramming a Video Graphics Card into a radio transceiver. The Air-Gap security protocol alone would prevent the Video Graphics card from being able to send out radio signals to any device. Also, Mainframe Servers do not use Video Graphics Cards and are not capable of Radio frequency emissions.
While speaking to his wife over the phone, Ethan James, the American head of Pine Gap (but played by Englishman Steve Toussaint) says, "Hey, let's do something special at the week end", with a noticeable break between the two final words. An American would have said, "on the weekend".