We use satellite circuits that are 25,000 miles long millions of times every single day. Why is a 240,000-mile line of sight circuit so inconceivable to you? Even amateur radio operators send signals to the Moon and back on a regular basis. And it's trivial to connect a radio transceiver to the telephone network. RCA was doing that by 1935.
It seems like you know very little about data transmission networks and their history. Might make sense to research outside of the conspiracy influencer bubbles.