How did radio relay systems support Allied forces during the Normandy campaign?

During the Normandy campaign, radio relay systems were a critical development that provided essential mobility and communication capacity for Allied forces. Born of the necessity for mobile operations, these systems utilized frequency modulation and carrier techniques, as well as radar pulse transmission and multiplex time-division methods, to obtain multiple voice channels from a single radio carrier.1

These radio relay telephone and teletypewriter circuits were instrumental in spanning the English Channel to support the initial Normandy landings. Following the successful establishment of the beachhead, these systems continued to furnish vital communication services for General George S. Patton during his breakout from Normandy, allowing for the coordination of highly mobile field units.1