ATC COMMS
In our ATC centre the comms are all digital interface with TID selection. When a GSM (mobile) is left on in the centre (against local orders I might add) the phone when it searches, or for a worst example actually rings...WILL block our frequency and transmits the electrical interference sound you here when your phone is near car radio's/CD Players/Speakers etc. To that end a supressor has been installed to jam the signals of peoples phones. Additionally when a pilot transmits to ATC and there is GSM in the flight deck searching etc. we receive the interference at our end. If you have ever placed your phone next to the PC when it goes off, just watch the screen go bezerk. Still some unknowns with these little puppies I think.
