The data link communications offers a more efficient conflict resolution strategy in order to increase the effective capacity of the communications channel, reduce delay in severe weather, and enhance pilots and air traffic controller working environment. In [3], interesting statistics about CPDLC versus voice radio communications can be found. The authors showed that the reduction in analog voice usage increase linearly as a function of CPDLC equipage: for 100% CPDLC aircraft equipped, the radio voice usage decreases by 84%.