Description / Abstract: The document describes the current situation as well as goals and objectives for transition from analog Air/Ground (A/G) telecommunications to A/G Very High Frequency (VHF) Digital Link Mode 3 (VDL Mode 3) based integrated voice and data communications. It includes a transition strategy from analog voice to VDL Mode 3 digital voice and Aeronautical Telecommunications Network (ATN) based data communications via VHF Digital Link Mode 2 and VDL Mode 3.