General Dynamics to Provide FAA with Radios for Backup Emergency Air Traffic Control Communications - General Dynamics Mission Systems
We know that when someone is speaking on the radio with ATC, he tells his call sign. But is there any other system that verifies the identity of the person speaking besides
![Barrett provides HF radio for air traffic control towers for peacekeeping forces - Barrett Communications Barrett provides HF radio for air traffic control towers for peacekeeping forces - Barrett Communications](https://www.barrettcommunications.com.au/wp-content/uploads/2016/11/2050_P01.png)